# Scrapy 1.x release notes

## Scrapy 1.8.4 (2024-02-14)

**Security bug fixes:**

- Due to its [ReDoS vulnerabilities](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), `scrapy.utils.iterators.xmliter` is
  now deprecated in favor of [`xmliter_lxml()`](../faq.md),
  which [`XMLFeedSpider`](../topics/spiders.md) now uses.

  To minimize the impact of this change on existing code,
  [`xmliter_lxml()`](../faq.md) now supports indicating
  the node namespace as a prefix in the node name, and big files with highly
  nested trees when using libxml2 2.7+.

  Please, see the [cc65-xxvf-f7r9 security advisory](https://github.com/scrapy/scrapy/security/advisories/GHSA-cc65-xxvf-f7r9) for more information.
- [`DOWNLOAD_MAXSIZE`](../topics/settings.md) and [`DOWNLOAD_WARNSIZE`](../topics/settings.md) now also apply
  to the decompressed response body. Please, see the [7j7m-v7m3-jqm7 security
  advisory](https://github.com/scrapy/scrapy/security/advisories/GHSA-7j7m-v7m3-jqm7) for more information.
- Also in relation with the [7j7m-v7m3-jqm7 security advisory](https://github.com/scrapy/scrapy/security/advisories/GHSA-7j7m-v7m3-jqm7), use of the
  `scrapy.downloadermiddlewares.decompression` module is discouraged and
  will trigger a warning.
- The `Authorization` header is now dropped on redirects to a different
  domain. Please, see the [cw9j-q3vf-hrrv security advisory](https://github.com/scrapy/scrapy/security/advisories/GHSA-cw9j-q3vf-hrrv) for more
  information.

## Scrapy 1.8.3 (2022-07-25)

**Security bug fix:**

- When [`HttpProxyMiddleware`](../topics/downloader-middleware.md)
  processes a request with [`proxy`](../topics/downloader-middleware.md) metadata, and that
  [`proxy`](../topics/downloader-middleware.md) metadata includes proxy credentials,
  [`HttpProxyMiddleware`](../topics/downloader-middleware.md) sets
  the `Proxy-Authorization` header, but only if that header is not already
  set.

  There are third-party proxy-rotation downloader middlewares that set
  different [`proxy`](../topics/downloader-middleware.md) metadata every time they process a request.

  Because of request retries and redirects, the same request can be processed
  by downloader middlewares more than once, including both
  [`HttpProxyMiddleware`](../topics/downloader-middleware.md) and
  any third-party proxy-rotation downloader middleware.

  These third-party proxy-rotation downloader middlewares could change the
  [`proxy`](../topics/downloader-middleware.md) metadata of a request to a new value, but fail to remove
  the `Proxy-Authorization` header from the previous value of the
  [`proxy`](../topics/downloader-middleware.md) metadata, causing the credentials of one proxy to be sent
  to a different proxy.

  To prevent the unintended leaking of proxy credentials, the behavior of
  [`HttpProxyMiddleware`](../topics/downloader-middleware.md) is now
  as follows when processing a request:
  - If the request being processed defines [`proxy`](../topics/downloader-middleware.md) metadata that
    includes credentials, the `Proxy-Authorization` header is always
    updated to feature those credentials.
  - If the request being processed defines [`proxy`](../topics/downloader-middleware.md) metadata
    without credentials, the `Proxy-Authorization` header is removed
    *unless* it was originally defined for the same proxy URL.

    To remove proxy credentials while keeping the same proxy URL, remove
    the `Proxy-Authorization` header.
  - If the request has no [`proxy`](../topics/downloader-middleware.md) metadata, or that metadata is a
    falsy value (e.g. `None`), the `Proxy-Authorization` header is
    removed.

    It is no longer possible to set a proxy URL through the
    [`proxy`](../topics/downloader-middleware.md) metadata but set the credentials through the
    `Proxy-Authorization` header. Set proxy credentials through the
    [`proxy`](../topics/downloader-middleware.md) metadata instead.

## Scrapy 1.8.2 (2022-03-01)

**Security bug fixes:**

- When a [`Request`](../topics/request-response.md) object with cookies defined gets a
  redirect response causing a new [`Request`](../topics/request-response.md) object to be
  scheduled, the cookies defined in the original
  [`Request`](../topics/request-response.md) object are no longer copied into the new
  [`Request`](../topics/request-response.md) object.

  If you manually set the `Cookie` header on a
  [`Request`](../topics/request-response.md) object and the domain name of the redirect
  URL is not an exact match for the domain of the URL of the original
  [`Request`](../topics/request-response.md) object, your `Cookie` header is now dropped
  from the new [`Request`](../topics/request-response.md) object.

  The old behavior could be exploited by an attacker to gain access to your
  cookies. Please, see the [cjvr-mfj7-j4j8 security advisory](https://github.com/scrapy/scrapy/security/advisories/GHSA-cjvr-mfj7-j4j8) for more
  information.
  > [!NOTE]
  > It is still possible to enable the sharing of cookies between
  > different domains with a shared domain suffix (e.g.
  > `example.com` and any subdomain) by defining the shared domain
  > suffix (e.g. `example.com`) as the cookie domain when defining
  > your cookies. See the documentation of the
  > [`Request`](../topics/request-response.md) class for more information.
- When the domain of a cookie, either received in the `Set-Cookie` header
  of a response or defined in a [`Request`](../topics/request-response.md) object, is set
  to a [public suffix](https://publicsuffix.org/), the cookie is now
  ignored unless the cookie domain is the same as the request domain.

  The old behavior could be exploited by an attacker to inject cookies into
  your requests to some other domains. Please, see the [mfjm-vh54-3f96
  security advisory](https://github.com/scrapy/scrapy/security/advisories/GHSA-mfjm-vh54-3f96) for more information.

## Scrapy 1.8.1 (2021-10-05)

* **Security bug fix:**

  If you use
  [`HttpAuthMiddleware`](../topics/downloader-middleware.md)
  (i.e. the `http_user` and `http_pass` spider attributes) for HTTP
  authentication, any request exposes your credentials to the request target.

  To prevent unintended exposure of authentication credentials to unintended
  domains, you must now additionally set a new, additional spider attribute,
  `http_auth_domain`, and point it to the specific domain to which the
  authentication credentials must be sent.

  If the `http_auth_domain` spider attribute is not set, the domain of the
  first request will be considered the HTTP authentication target, and
  authentication credentials will only be sent in requests targeting that
  domain.

  If you need to send the same HTTP authentication credentials to multiple
  domains, you can use [`w3lib.http.basic_auth_header()`](https://w3lib.readthedocs.io/en/latest/w3lib.html#w3lib.http.basic_auth_header) instead to
  set the value of the `Authorization` header of your requests.

  If you *really* want your spider to send the same HTTP authentication
  credentials to any domain, set the `http_auth_domain` spider attribute
  to `None`.

  Finally, if you are a user of [scrapy-splash](https://github.com/scrapy-plugins/scrapy-splash), know that this version of
  Scrapy breaks compatibility with scrapy-splash 0.7.2 and earlier. You will
  need to upgrade scrapy-splash to a greater version for it to continue to
  work.

## Scrapy 1.8.0 (2019-10-28)

Highlights:

* Dropped Python 3.4 support and updated minimum requirements; made Python 3.8
  support official
* New [`Request.from_curl()`](../topics/request-response.md) class method
* New [`ROBOTSTXT_PARSER`](../topics/settings.md) and [`ROBOTSTXT_USER_AGENT`](../topics/settings.md) settings
* New [`DOWNLOADER_CLIENT_TLS_CIPHERS`](../topics/settings.md) and
  [`DOWNLOADER_CLIENT_TLS_VERBOSE_LOGGING`](../topics/settings.md) settings

### Backward-incompatible changes

* Python 3.4 is no longer supported, and some of the minimum requirements of
  Scrapy have also changed:
  * [cssselect](https://cssselect.readthedocs.io/en/latest/index.html) 0.9.1
  * [cryptography](https://cryptography.io/en/latest/) 2.0
  * [lxml](https://lxml.de/) 3.5.0
  * [pyOpenSSL](https://www.pyopenssl.org/en/stable/) 16.2.0
  * [queuelib](https://github.com/scrapy/queuelib) 1.4.2
  * [service_identity](https://service-identity.readthedocs.io/en/stable/) 16.0.0
  * [six](https://six.readthedocs.io/) 1.10.0
  * [Twisted](https://twisted.org/) 17.9.0 (16.0.0 with Python 2)
  * [zope.interface](https://zopeinterface.readthedocs.io/en/latest/) 4.1.3

  ([#3892](https://github.com/scrapy/scrapy/issues/3892))
* `JSONRequest` is now called [`JsonRequest`](../topics/request-response.md) for
  consistency with similar classes ([#3929](https://github.com/scrapy/scrapy/issues/3929), [#3982](https://github.com/scrapy/scrapy/issues/3982))
* If you are using a custom context factory
  (`DOWNLOADER_CLIENTCONTEXTFACTORY`), its `__init__` method must
  accept two new parameters: `tls_verbose_logging` and `tls_ciphers`
  ([#2111](https://github.com/scrapy/scrapy/issues/2111), [#3392](https://github.com/scrapy/scrapy/issues/3392), [#3442](https://github.com/scrapy/scrapy/issues/3442), [#3450](https://github.com/scrapy/scrapy/issues/3450))
* [`ItemLoader`](../topics/loaders.md) now turns the values of its input item
  into lists:
  ```pycon
  >>> item = MyItem()
  >>> item["field"] = "value1"
  >>> loader = ItemLoader(item=item)
  >>> item["field"]
  ['value1']
  ```

  This is needed to allow adding values to existing fields
  (`loader.add_value('field', 'value2')`).

  ([#3804](https://github.com/scrapy/scrapy/issues/3804), [#3819](https://github.com/scrapy/scrapy/issues/3819), [#3897](https://github.com/scrapy/scrapy/issues/3897), [#3976](https://github.com/scrapy/scrapy/issues/3976), [#3998](https://github.com/scrapy/scrapy/issues/3998),
  [#4036](https://github.com/scrapy/scrapy/issues/4036))

See also Deprecation removals below.

### New features

* A new [`Request.from_curl`](../topics/request-response.md) class
  method allows [creating a request from a cURL command](../topics/developer-tools.md) ([#2985](https://github.com/scrapy/scrapy/issues/2985), [#3862](https://github.com/scrapy/scrapy/issues/3862))
* A new [`ROBOTSTXT_PARSER`](../topics/settings.md) setting allows choosing which [robots.txt](https://www.robotstxt.org/)
  parser to use. It includes built-in support for
  [RobotFileParser](../topics/downloader-middleware.md),
  [Protego](../topics/downloader-middleware.md "Protego parser") (default), Reppy, and
  [Robotexclusionrulesparser](../topics/downloader-middleware.md), and allows you to
  [implement support for additional parsers](../topics/downloader-middleware.md "Implementing support for a new parser") ([#754](https://github.com/scrapy/scrapy/issues/754), [#2669](https://github.com/scrapy/scrapy/issues/2669),
  [#3796](https://github.com/scrapy/scrapy/issues/3796), [#3935](https://github.com/scrapy/scrapy/issues/3935), [#3969](https://github.com/scrapy/scrapy/issues/3969), [#4006](https://github.com/scrapy/scrapy/issues/4006))
* A new [`ROBOTSTXT_USER_AGENT`](../topics/settings.md) setting allows defining a separate
  user agent string to use for [robots.txt](https://www.robotstxt.org/) parsing ([#3931](https://github.com/scrapy/scrapy/issues/3931),
  [#3966](https://github.com/scrapy/scrapy/issues/3966))
* [`Rule`](../topics/spiders.md) no longer requires a [`LinkExtractor`](../topics/link-extractors.md) parameter
  ([#781](https://github.com/scrapy/scrapy/issues/781), [#4016](https://github.com/scrapy/scrapy/issues/4016))
* Use the new [`DOWNLOADER_CLIENT_TLS_CIPHERS`](../topics/settings.md) setting to customize
  the TLS/SSL ciphers used by the default HTTP/1.1 downloader ([#3392](https://github.com/scrapy/scrapy/issues/3392),
  [#3442](https://github.com/scrapy/scrapy/issues/3442))
* Set the new [`DOWNLOADER_CLIENT_TLS_VERBOSE_LOGGING`](../topics/settings.md) setting to
  `True` to enable debug-level messages about TLS connection parameters
  after establishing HTTPS connections ([#2111](https://github.com/scrapy/scrapy/issues/2111), [#3450](https://github.com/scrapy/scrapy/issues/3450))
* Callbacks that receive keyword arguments (see [`Request.cb_kwargs`](../topics/request-response.md))
  can now be tested using the new [`@cb_kwargs`](../topics/contracts.md)
  [spider contract](../topics/contracts.md) ([#3985](https://github.com/scrapy/scrapy/issues/3985), [#3988](https://github.com/scrapy/scrapy/issues/3988))
* When a [`@scrapes`](../topics/contracts.md) spider
  contract fails, all missing fields are now reported ([#766](https://github.com/scrapy/scrapy/issues/766),
  [#3939](https://github.com/scrapy/scrapy/issues/3939))
* [Custom log formats](../topics/logging.md) can now drop messages by
  having the corresponding methods of the configured [`LOG_FORMATTER`](../topics/settings.md)
  return `None` ([#3984](https://github.com/scrapy/scrapy/issues/3984), [#3987](https://github.com/scrapy/scrapy/issues/3987))
* A much improved completion definition is now available for [Zsh](https://www.zsh.org/)
  ([#4069](https://github.com/scrapy/scrapy/issues/4069))

### Bug fixes

* [`ItemLoader.load_item()`](../topics/loaders.md) no
  longer makes later calls to [`ItemLoader.get_output_value()`](../topics/loaders.md) or
  [`ItemLoader.load_item()`](../topics/loaders.md) return
  empty data ([#3804](https://github.com/scrapy/scrapy/issues/3804), [#3819](https://github.com/scrapy/scrapy/issues/3819), [#3897](https://github.com/scrapy/scrapy/issues/3897), [#3976](https://github.com/scrapy/scrapy/issues/3976),
  [#3998](https://github.com/scrapy/scrapy/issues/3998), [#4036](https://github.com/scrapy/scrapy/issues/4036))
* Fixed [`DummyStatsCollector`](../topics/stats.md) raising a
  `TypeError` exception ([#4007](https://github.com/scrapy/scrapy/issues/4007), [#4052](https://github.com/scrapy/scrapy/issues/4052))
* [`FilesPipeline.file_path`](../topics/media-pipeline.md) and
  [`ImagesPipeline.file_path`](../topics/media-pipeline.md) no longer choose
  file extensions that are not [registered with IANA](https://www.iana.org/assignments/media-types/media-types.xhtml) ([#1287](https://github.com/scrapy/scrapy/issues/1287),
  [#3953](https://github.com/scrapy/scrapy/issues/3953), [#3954](https://github.com/scrapy/scrapy/issues/3954))
* When using [botocore](https://github.com/boto/botocore) to persist files in S3, all botocore-supported headers
  are properly mapped now ([#3904](https://github.com/scrapy/scrapy/issues/3904), [#3905](https://github.com/scrapy/scrapy/issues/3905))
* FTP passwords in `FEED_URI` containing percent-escaped characters
  are now properly decoded ([#3941](https://github.com/scrapy/scrapy/issues/3941))
* A memory-handling and error-handling issue in
  `scrapy.utils.ssl.get_temp_key_info()` has been fixed ([#3920](https://github.com/scrapy/scrapy/issues/3920))

### Documentation

* The documentation now covers how to define and configure a [custom log
  format](../topics/logging.md "Custom Log Formats") ([#3616](https://github.com/scrapy/scrapy/issues/3616), [#3660](https://github.com/scrapy/scrapy/issues/3660))
* API documentation added for [`MarshalItemExporter`](../topics/exporters.md)
  and [`PythonItemExporter`](../topics/exporters.md) ([#3973](https://github.com/scrapy/scrapy/issues/3973))
* API documentation added for `BaseItem` and
  [`ItemMeta`](../topics/items.md) ([#3999](https://github.com/scrapy/scrapy/issues/3999))
* Minor documentation fixes ([#2998](https://github.com/scrapy/scrapy/issues/2998), [#3398](https://github.com/scrapy/scrapy/issues/3398), [#3597](https://github.com/scrapy/scrapy/issues/3597),
  [#3894](https://github.com/scrapy/scrapy/issues/3894), [#3934](https://github.com/scrapy/scrapy/issues/3934), [#3978](https://github.com/scrapy/scrapy/issues/3978), [#3993](https://github.com/scrapy/scrapy/issues/3993), [#4022](https://github.com/scrapy/scrapy/issues/4022),
  [#4028](https://github.com/scrapy/scrapy/issues/4028), [#4033](https://github.com/scrapy/scrapy/issues/4033), [#4046](https://github.com/scrapy/scrapy/issues/4046), [#4050](https://github.com/scrapy/scrapy/issues/4050), [#4055](https://github.com/scrapy/scrapy/issues/4055),
  [#4056](https://github.com/scrapy/scrapy/issues/4056), [#4061](https://github.com/scrapy/scrapy/issues/4061), [#4072](https://github.com/scrapy/scrapy/issues/4072), [#4071](https://github.com/scrapy/scrapy/issues/4071), [#4079](https://github.com/scrapy/scrapy/issues/4079),
  [#4081](https://github.com/scrapy/scrapy/issues/4081), [#4089](https://github.com/scrapy/scrapy/issues/4089), [#4093](https://github.com/scrapy/scrapy/issues/4093))

### Deprecation removals

* `scrapy.xlib` has been removed ([#4015](https://github.com/scrapy/scrapy/issues/4015))

### Deprecations

* The [LevelDB](https://github.com/google/leveldb) storage backend
  (`scrapy.extensions.httpcache.LeveldbCacheStorage`) of
  [`HttpCacheMiddleware`](../topics/downloader-middleware.md) is
  deprecated ([#4085](https://github.com/scrapy/scrapy/issues/4085), [#4092](https://github.com/scrapy/scrapy/issues/4092))
* Use of the undocumented `SCRAPY_PICKLED_SETTINGS_TO_OVERRIDE` environment
  variable is deprecated ([#3910](https://github.com/scrapy/scrapy/issues/3910))
* `scrapy.item.DictItem` is deprecated, use [`Item`](../topics/items.md)
  instead ([#3999](https://github.com/scrapy/scrapy/issues/3999))

### Other changes

* Minimum versions of optional Scrapy requirements that are covered by
  continuous integration tests have been updated:
  * [botocore](https://github.com/boto/botocore) 1.3.23
  * [Pillow](https://github.com/python-pillow/Pillow) 3.4.2

  Lower versions of these optional requirements may work, but it is not
  guaranteed ([#3892](https://github.com/scrapy/scrapy/issues/3892))
* GitHub templates for bug reports and feature requests ([#3126](https://github.com/scrapy/scrapy/issues/3126),
  [#3471](https://github.com/scrapy/scrapy/issues/3471), [#3749](https://github.com/scrapy/scrapy/issues/3749), [#3754](https://github.com/scrapy/scrapy/issues/3754))
* Continuous integration fixes ([#3923](https://github.com/scrapy/scrapy/issues/3923))
* Code cleanup ([#3391](https://github.com/scrapy/scrapy/issues/3391), [#3907](https://github.com/scrapy/scrapy/issues/3907), [#3946](https://github.com/scrapy/scrapy/issues/3946), [#3950](https://github.com/scrapy/scrapy/issues/3950),
  [#4023](https://github.com/scrapy/scrapy/issues/4023), [#4031](https://github.com/scrapy/scrapy/issues/4031))

## Scrapy 1.7.4 (2019-10-21)

Revert the fix for [#3804](https://github.com/scrapy/scrapy/issues/3804) ([#3819](https://github.com/scrapy/scrapy/issues/3819)), which has a few undesired
side effects ([#3897](https://github.com/scrapy/scrapy/issues/3897), [#3976](https://github.com/scrapy/scrapy/issues/3976)).

As a result, when an item loader is initialized with an item,
[`ItemLoader.load_item()`](../topics/loaders.md) once again
makes later calls to [`ItemLoader.get_output_value()`](../topics/loaders.md) or [`ItemLoader.load_item()`](../topics/loaders.md) return empty data.

## Scrapy 1.7.3 (2019-08-01)

Enforce lxml 4.3.5 or lower for Python 3.4 ([#3912](https://github.com/scrapy/scrapy/issues/3912), [#3918](https://github.com/scrapy/scrapy/issues/3918)).

## Scrapy 1.7.2 (2019-07-23)

Fix Python 2 support ([#3889](https://github.com/scrapy/scrapy/issues/3889), [#3893](https://github.com/scrapy/scrapy/issues/3893), [#3896](https://github.com/scrapy/scrapy/issues/3896)).

## Scrapy 1.7.1 (2019-07-18)

Re-packaging of Scrapy 1.7.0, which was missing some changes in PyPI.

## Scrapy 1.7.0 (2019-07-18)

> [!NOTE]
> Make sure you install Scrapy 1.7.1. The Scrapy 1.7.0 package in PyPI
> is the result of an erroneous commit tagging and does not include all
> the changes described below.

Highlights:

* Improvements for crawls targeting multiple domains
* A cleaner way to pass arguments to callbacks
* A new class for JSON requests
* Improvements for rule-based spiders
* New features for feed exports

### Backward-incompatible changes

* `429` is now part of the [`RETRY_HTTP_CODES`](../topics/downloader-middleware.md) setting by default

  This change is **backward incompatible**. If you don’t want to retry
  `429`, you must override [`RETRY_HTTP_CODES`](../topics/downloader-middleware.md) accordingly.
* [`Crawler`](../topics/api.md),
  [`CrawlerRunner.crawl`](../topics/api.md) and
  `CrawlerRunner.create_crawler`
  no longer accept a [`Spider`](../topics/spiders.md) subclass instance, they
  only accept a [`Spider`](../topics/spiders.md) subclass now.

  [`Spider`](../topics/spiders.md) subclass instances were never meant to
  work, and they were not working as one would expect: instead of using the
  passed [`Spider`](../topics/spiders.md) subclass instance, their
  `from_crawler` method was called to generate
  a new instance.
* Non-default values for the [`SCHEDULER_PRIORITY_QUEUE`](../topics/settings.md) setting
  may stop working. Scheduler priority queue classes now need to handle
  [`Request`](../topics/request-response.md) objects instead of arbitrary Python data
  structures.
* An additional `crawler` parameter has been added to the `__init__`
  method of the [`Scheduler`](../topics/scheduler.md) class. Custom
  scheduler subclasses which don’t accept arbitrary parameters in their
  `__init__` method might break because of this change.

  For more information, see [`SCHEDULER`](../topics/settings.md).

See also Deprecation removals below.

### New features

* A new scheduler priority queue,
  `scrapy.pqueues.DownloaderAwarePriorityQueue`, may be
  [enabled](../topics/settings.md "SCHEDULER_PRIORITY_QUEUE") for a significant
  scheduling improvement on crawls targeting multiple web domains, at the
  cost of no `CONCURRENT_REQUESTS_PER_IP` support ([#3520](https://github.com/scrapy/scrapy/issues/3520))
* A new [`Request.cb_kwargs`](../topics/request-response.md) attribute
  provides a cleaner way to pass keyword arguments to callback methods
  ([#1138](https://github.com/scrapy/scrapy/issues/1138), [#3563](https://github.com/scrapy/scrapy/issues/3563))
* A new [`JSONRequest`](../topics/request-response.md) class offers a more
  convenient way to build JSON requests ([#3504](https://github.com/scrapy/scrapy/issues/3504), [#3505](https://github.com/scrapy/scrapy/issues/3505))
* A `process_request` callback passed to the [`Rule`](../topics/spiders.md)
  `__init__` method now receives the [`Response`](../topics/request-response.md) object that
  originated the request as its second argument ([#3682](https://github.com/scrapy/scrapy/issues/3682))
* A new `restrict_text` parameter for the
  [`LinkExtractor`](../topics/link-extractors.md)
  `__init__` method allows filtering links by linking text ([#3622](https://github.com/scrapy/scrapy/issues/3622),
  [#3635](https://github.com/scrapy/scrapy/issues/3635))
* A new [`FEED_STORAGE_S3_ACL`](../topics/feed-exports.md) setting allows defining a custom ACL
  for feeds exported to Amazon S3 ([#3607](https://github.com/scrapy/scrapy/issues/3607))
* A new [`FEED_STORAGE_FTP_ACTIVE`](../topics/feed-exports.md) setting allows using FTP’s active
  connection mode for feeds exported to FTP servers ([#3829](https://github.com/scrapy/scrapy/issues/3829))
* A new [`METAREFRESH_IGNORE_TAGS`](https://docs.scrapy.org/en/latest/topics/downloader-middleware.md#std-setting-METAREFRESH_IGNORE_TAGS) setting allows overriding which
  HTML tags are ignored when searching a response for HTML meta tags that
  trigger a redirect ([#1422](https://github.com/scrapy/scrapy/issues/1422), [#3768](https://github.com/scrapy/scrapy/issues/3768))
* A new [`redirect_reasons`](../topics/downloader-middleware.md) request meta key exposes the reason
  (status code, meta refresh) behind every followed redirect ([#3581](https://github.com/scrapy/scrapy/issues/3581),
  [#3687](https://github.com/scrapy/scrapy/issues/3687))
* The `SCRAPY_CHECK` variable is now set to the `true` string during runs
  of the [`check`](../topics/commands.md) command, which allows [detecting contract
  check runs from code](../topics/contracts.md "Detecting check runs") ([#3704](https://github.com/scrapy/scrapy/issues/3704),
  [#3739](https://github.com/scrapy/scrapy/issues/3739))
* A new `Item.deepcopy()` method makes it
  easier to [deep-copy items](../topics/items.md "Copying items") ([#1493](https://github.com/scrapy/scrapy/issues/1493),
  [#3671](https://github.com/scrapy/scrapy/issues/3671))
* [`CoreStats`](../topics/extensions.md) also logs
  `elapsed_time_seconds` now ([#3638](https://github.com/scrapy/scrapy/issues/3638))
* Exceptions from [`ItemLoader`](../topics/loaders.md) [input and output
  processors](../topics/loaders.md "Input and Output processors") are now more verbose
  ([#3836](https://github.com/scrapy/scrapy/issues/3836), [#3840](https://github.com/scrapy/scrapy/issues/3840))
* [`Crawler`](../topics/api.md),
  [`CrawlerRunner.crawl`](../topics/api.md) and
  `CrawlerRunner.create_crawler`
  now fail gracefully if they receive a [`Spider`](../topics/spiders.md)
  subclass instance instead of the subclass itself ([#2283](https://github.com/scrapy/scrapy/issues/2283),
  [#3610](https://github.com/scrapy/scrapy/issues/3610), [#3872](https://github.com/scrapy/scrapy/issues/3872))

### Bug fixes

* [`process_spider_exception()`](../topics/spider-middleware.md)
  is now also invoked for generators ([#220](https://github.com/scrapy/scrapy/issues/220), [#2061](https://github.com/scrapy/scrapy/issues/2061))
* System exceptions like [KeyboardInterrupt](https://docs.python.org/3/library/exceptions.html#KeyboardInterrupt) are no longer caught
  ([#3726](https://github.com/scrapy/scrapy/issues/3726))
* [`ItemLoader.load_item()`](../topics/loaders.md) no
  longer makes later calls to [`ItemLoader.get_output_value()`](../topics/loaders.md) or
  [`ItemLoader.load_item()`](../topics/loaders.md) return
  empty data ([#3804](https://github.com/scrapy/scrapy/issues/3804), [#3819](https://github.com/scrapy/scrapy/issues/3819))
* The images pipeline ([`ImagesPipeline`](../topics/media-pipeline.md)) no
  longer ignores these Amazon S3 settings: [`AWS_ENDPOINT_URL`](../topics/settings.md),
  [`AWS_REGION_NAME`](../topics/settings.md), [`AWS_USE_SSL`](../topics/settings.md), [`AWS_VERIFY`](../topics/settings.md)
  ([#3625](https://github.com/scrapy/scrapy/issues/3625))
* Fixed a memory leak in `scrapy.pipelines.media.MediaPipeline` affecting,
  for example, non-200 responses and exceptions from custom middlewares
  ([#3813](https://github.com/scrapy/scrapy/issues/3813))
* Requests with private callbacks are now correctly unserialized from disk
  ([#3790](https://github.com/scrapy/scrapy/issues/3790))
* `FormRequest.from_response()`
  now handles invalid methods like major web browsers ([#3777](https://github.com/scrapy/scrapy/issues/3777),
  [#3794](https://github.com/scrapy/scrapy/issues/3794))

### Documentation

* A new topic, [Selecting dynamically-loaded content](../topics/dynamic-content.md), covers recommended approaches
  to read dynamically-loaded data ([#3703](https://github.com/scrapy/scrapy/issues/3703))
* [Speeding up broad crawls](../topics/optimize.md) now features information about memory usage
  ([#1264](https://github.com/scrapy/scrapy/issues/1264), [#3866](https://github.com/scrapy/scrapy/issues/3866))
* The documentation of [`Rule`](../topics/spiders.md) now covers how to access
  the text of a link when using [`CrawlSpider`](../topics/spiders.md)
  ([#3711](https://github.com/scrapy/scrapy/issues/3711), [#3712](https://github.com/scrapy/scrapy/issues/3712))
* A new section, [Writing your own storage backend](../topics/downloader-middleware.md), covers writing a custom
  cache storage backend for
  [`HttpCacheMiddleware`](../topics/downloader-middleware.md)
  ([#3683](https://github.com/scrapy/scrapy/issues/3683), [#3692](https://github.com/scrapy/scrapy/issues/3692))
* A new [FAQ](../faq.md) entry, [How to split an item into multiple items in an item pipeline?](../faq.md), explains what to do
  when you want to split an item into multiple items from an item pipeline
  ([#2240](https://github.com/scrapy/scrapy/issues/2240), [#3672](https://github.com/scrapy/scrapy/issues/3672))
* Updated the [FAQ entry about crawl order](../faq.md "Does Scrapy crawl in breadth-first or depth-first order?") to explain why
  the first few requests rarely follow the desired order ([#1739](https://github.com/scrapy/scrapy/issues/1739),
  [#3621](https://github.com/scrapy/scrapy/issues/3621))
* The [`LOGSTATS_INTERVAL`](../topics/settings.md) setting ([#3730](https://github.com/scrapy/scrapy/issues/3730)), the
  [`FilesPipeline.file_path`](../topics/media-pipeline.md)
  and
  [`ImagesPipeline.file_path`](../topics/media-pipeline.md)
  methods ([#2253](https://github.com/scrapy/scrapy/issues/2253), [#3609](https://github.com/scrapy/scrapy/issues/3609)) and the
  [`Crawler.stop()`](../topics/api.md) method ([#3842](https://github.com/scrapy/scrapy/issues/3842))
  are now documented
* Some parts of the documentation that were confusing or misleading are now
  clearer ([#1347](https://github.com/scrapy/scrapy/issues/1347), [#1789](https://github.com/scrapy/scrapy/issues/1789), [#2289](https://github.com/scrapy/scrapy/issues/2289), [#3069](https://github.com/scrapy/scrapy/issues/3069),
  [#3615](https://github.com/scrapy/scrapy/issues/3615), [#3626](https://github.com/scrapy/scrapy/issues/3626), [#3668](https://github.com/scrapy/scrapy/issues/3668), [#3670](https://github.com/scrapy/scrapy/issues/3670), [#3673](https://github.com/scrapy/scrapy/issues/3673),
  [#3728](https://github.com/scrapy/scrapy/issues/3728), [#3762](https://github.com/scrapy/scrapy/issues/3762), [#3861](https://github.com/scrapy/scrapy/issues/3861), [#3882](https://github.com/scrapy/scrapy/issues/3882))
* Minor documentation fixes ([#3648](https://github.com/scrapy/scrapy/issues/3648), [#3649](https://github.com/scrapy/scrapy/issues/3649), [#3662](https://github.com/scrapy/scrapy/issues/3662),
  [#3674](https://github.com/scrapy/scrapy/issues/3674), [#3676](https://github.com/scrapy/scrapy/issues/3676), [#3694](https://github.com/scrapy/scrapy/issues/3694), [#3724](https://github.com/scrapy/scrapy/issues/3724), [#3764](https://github.com/scrapy/scrapy/issues/3764),
  [#3767](https://github.com/scrapy/scrapy/issues/3767), [#3791](https://github.com/scrapy/scrapy/issues/3791), [#3797](https://github.com/scrapy/scrapy/issues/3797), [#3806](https://github.com/scrapy/scrapy/issues/3806), [#3812](https://github.com/scrapy/scrapy/issues/3812))

### Deprecation removals

The following deprecated APIs have been removed ([#3578](https://github.com/scrapy/scrapy/issues/3578)):

* `scrapy.conf` (use [`Crawler.settings`](../topics/api.md))
* From `scrapy.core.downloader.handlers`:
  * `http.HttpDownloadHandler` (use `http10.HTTP10DownloadHandler`)
* `scrapy.loader.ItemLoader._get_values` (use `_get_xpathvalues`)
* `scrapy.loader.XPathItemLoader` (use [`ItemLoader`](../topics/loaders.md))
* `scrapy.log` (see [Logging](../topics/logging.md))
* From `scrapy.pipelines`:
  * `files.FilesPipeline.file_key` (use `file_path`)
  * `images.ImagesPipeline.file_key` (use `file_path`)
  * `images.ImagesPipeline.image_key` (use `file_path`)
  * `images.ImagesPipeline.thumb_key` (use `thumb_path`)
* From both `scrapy.selector` and `scrapy.selector.lxmlsel`:
  * `HtmlXPathSelector` (use [`Selector`](../topics/selectors.md))
  * `XmlXPathSelector` (use [`Selector`](../topics/selectors.md))
  * `XPathSelector` (use [`Selector`](../topics/selectors.md))
  * `XPathSelectorList` (use [`Selector`](../topics/selectors.md))
* From `scrapy.selector.csstranslator`:
  * `ScrapyGenericTranslator` (use [parsel.csstranslator.GenericTranslator](https://parsel.readthedocs.io/en/latest/parsel.md#parsel.csstranslator.GenericTranslator))
  * `ScrapyHTMLTranslator` (use [parsel.csstranslator.HTMLTranslator](https://parsel.readthedocs.io/en/latest/parsel.md#parsel.csstranslator.HTMLTranslator))
  * `ScrapyXPathExpr` (use [parsel.csstranslator.XPathExpr](https://parsel.readthedocs.io/en/latest/parsel.md#parsel.csstranslator.XPathExpr))
* From [`Selector`](../topics/selectors.md):
  * `_root` (both the `__init__` method argument and the object property, use
    `root`)
  * `extract_unquoted` (use `getall`)
  * `select` (use `xpath`)
* From [`SelectorList`](../topics/selectors.md):
  * `extract_unquoted` (use `getall`)
  * `select` (use `xpath`)
  * `x` (use `xpath`)
* `scrapy.spiders.BaseSpider` (use [`Spider`](../topics/spiders.md))
* From [`Spider`](../topics/spiders.md) (and subclasses):
  * `DOWNLOAD_DELAY` (use [download_delay](../topics/settings.md))
  * `set_crawler` (use `from_crawler()`)
* `scrapy.spiders.spiders` (use [`SpiderLoader`](../topics/api.md))
* `scrapy.telnet` (use [`scrapy.extensions.telnet`](../topics/telnetconsole.md))
* From `scrapy.utils.python`:
  * `str_to_unicode` (use `to_unicode`)
  * `unicode_to_str` (use `to_bytes`)
* `scrapy.utils.response.body_or_str`

The following deprecated settings have also been removed ([#3578](https://github.com/scrapy/scrapy/issues/3578)):

* `SPIDER_MANAGER_CLASS` (use [`SPIDER_LOADER_CLASS`](../topics/settings.md))

### Deprecations

* The `queuelib.PriorityQueue` value for the
  [`SCHEDULER_PRIORITY_QUEUE`](../topics/settings.md) setting is deprecated. Use
  `scrapy.pqueues.ScrapyPriorityQueue` instead.
* `process_request` callbacks passed to [`Rule`](../topics/spiders.md) that
  do not accept two arguments are deprecated.
* The following modules are deprecated:
  * `scrapy.utils.http` (use [w3lib.http](https://w3lib.readthedocs.io/en/latest/w3lib.html#module-w3lib.http))
  * `scrapy.utils.markup` (use [w3lib.html](https://w3lib.readthedocs.io/en/latest/w3lib.html#module-w3lib.html))
  * `scrapy.utils.multipart` (use [urllib3](https://urllib3.readthedocs.io/en/latest/index.html))
* The `scrapy.utils.datatypes.MergeDict` class is deprecated for Python 3
  code bases. Use [`ChainMap`](https://docs.python.org/3/library/collections.html#collections.ChainMap) instead. ([#3878](https://github.com/scrapy/scrapy/issues/3878))
* The `scrapy.utils.gz.is_gzipped` function is deprecated. Use
  `scrapy.utils.gz.gzip_magic_number` instead.

### Other changes

* It is now possible to run all tests from the same [tox](https://pypi.org/project/tox/) environment in
  parallel; the documentation now covers [this and other ways to run
  tests](../contributing.md "Running tests") ([#3707](https://github.com/scrapy/scrapy/issues/3707))
* It is now possible to generate an API documentation coverage report
  ([#3806](https://github.com/scrapy/scrapy/issues/3806), [#3810](https://github.com/scrapy/scrapy/issues/3810), [#3860](https://github.com/scrapy/scrapy/issues/3860))
* The [documentation policies](../contributing.md) now require
  [docstrings](https://docs.python.org/3/glossary.html#term-docstring) ([#3701](https://github.com/scrapy/scrapy/issues/3701)) that follow [PEP 257](https://peps.python.org/pep-0257/) ([#3748](https://github.com/scrapy/scrapy/issues/3748))
* Internal fixes and cleanup ([#3629](https://github.com/scrapy/scrapy/issues/3629), [#3643](https://github.com/scrapy/scrapy/issues/3643), [#3684](https://github.com/scrapy/scrapy/issues/3684),
  [#3698](https://github.com/scrapy/scrapy/issues/3698), [#3734](https://github.com/scrapy/scrapy/issues/3734), [#3735](https://github.com/scrapy/scrapy/issues/3735), [#3736](https://github.com/scrapy/scrapy/issues/3736), [#3737](https://github.com/scrapy/scrapy/issues/3737),
  [#3809](https://github.com/scrapy/scrapy/issues/3809), [#3821](https://github.com/scrapy/scrapy/issues/3821), [#3825](https://github.com/scrapy/scrapy/issues/3825), [#3827](https://github.com/scrapy/scrapy/issues/3827), [#3833](https://github.com/scrapy/scrapy/issues/3833),
  [#3857](https://github.com/scrapy/scrapy/issues/3857), [#3877](https://github.com/scrapy/scrapy/issues/3877))

## Scrapy 1.6.0 (2019-01-30)

Highlights:

* better Windows support;
* Python 3.7 compatibility;
* big documentation improvements, including a switch
  from `.extract_first()` + `.extract()` API to `.get()` + `.getall()`
  API;
* feed exports, FilePipeline and MediaPipeline improvements;
* better extensibility: [`item_error`](../topics/signals.md) and
  [`request_reached_downloader`](../topics/signals.md) signals; `from_crawler` support
  for feed exporters, feed storages and dupefilters.
* `scrapy.contracts` fixes and new features;
* telnet console security improvements, first released as a
  backport in Scrapy 1.5.2 (2019-01-22);
* clean-up of the deprecated code;
* various bug fixes, small new features and usability improvements across
  the codebase.

### Selector API changes

While these are not changes in Scrapy itself, but rather in the [parsel](https://github.com/scrapy/parsel)
library which Scrapy uses for xpath/css selectors, these changes are
worth mentioning here. Scrapy now depends on parsel >= 1.5, and
Scrapy documentation is updated to follow recent `parsel` API conventions.

Most visible change is that `.get()` and `.getall()` selector
methods are now preferred over `.extract_first()` and `.extract()`.
We feel that these new methods result in a more concise and readable code.
See [extract() and extract_first()](../topics/selectors.md) for more details.

> [!NOTE]
> There are currently **no plans** to deprecate `.extract()`
> and `.extract_first()` methods.

Another useful new feature is the introduction of `Selector.attrib` and
`SelectorList.attrib` properties, which make it easier to get
attributes of HTML elements. See [Selecting element attributes](../topics/selectors.md).

CSS selectors are cached in parsel >= 1.5, which makes them faster
when the same CSS path is used many times. This is very common in
case of Scrapy spiders: callbacks are usually called several times,
on different pages.

If you’re using custom `Selector` or `SelectorList` subclasses,
a **backward incompatible** change in parsel may affect your code.
See [parsel changelog](https://parsel.readthedocs.io/en/latest/history.md) for a detailed description, as well as for the
full list of improvements.

### Telnet console

**Backward incompatible**: Scrapy’s telnet console now requires username
and password. See [Telnet Console](../topics/telnetconsole.md) for more details. This change
fixes a **security issue**; see Scrapy 1.5.2 (2019-01-22) release notes for details.

### New extensibility features

* `from_crawler` support is added to feed exporters and feed storages. This,
  among other things, allows to access Scrapy settings from custom feed
  storages and exporters ([#1605](https://github.com/scrapy/scrapy/issues/1605), [#3348](https://github.com/scrapy/scrapy/issues/3348)).
* `from_crawler` support is added to dupefilters ([#2956](https://github.com/scrapy/scrapy/issues/2956)); this allows
  to access e.g. settings or a spider from a dupefilter.
* [`item_error`](../topics/signals.md) is fired when an error happens in a pipeline
  ([#3256](https://github.com/scrapy/scrapy/issues/3256));
* [`request_reached_downloader`](../topics/signals.md) is fired when Downloader gets
  a new Request; this signal can be useful e.g. for custom Schedulers
  ([#3393](https://github.com/scrapy/scrapy/issues/3393)).
* new SitemapSpider [`sitemap_filter()`](../topics/spiders.md) method which allows
  to select sitemap entries based on their attributes in SitemapSpider
  subclasses ([#3512](https://github.com/scrapy/scrapy/issues/3512)).
* Lazy loading of Downloader Handlers is now optional; this enables better
  initialization error handling in custom Downloader Handlers ([#3394](https://github.com/scrapy/scrapy/issues/3394)).

### New FilePipeline and MediaPipeline features

* Expose more options for S3FilesStore: [`AWS_ENDPOINT_URL`](../topics/settings.md),
  [`AWS_USE_SSL`](../topics/settings.md), [`AWS_VERIFY`](../topics/settings.md), [`AWS_REGION_NAME`](../topics/settings.md).
  For example, this allows to use alternative or self-hosted
  AWS-compatible providers ([#2609](https://github.com/scrapy/scrapy/issues/2609), [#3548](https://github.com/scrapy/scrapy/issues/3548)).
* ACL support for Google Cloud Storage: [`FILES_STORE_GCS_ACL`](../topics/media-pipeline.md) and
  [`IMAGES_STORE_GCS_ACL`](../topics/media-pipeline.md) ([#3199](https://github.com/scrapy/scrapy/issues/3199)).

### `scrapy.contracts` improvements

* Exceptions in contracts code are handled better ([#3377](https://github.com/scrapy/scrapy/issues/3377));
* `dont_filter=True` is used for contract requests, which allows to test
  different callbacks with the same URL ([#3381](https://github.com/scrapy/scrapy/issues/3381));
* `request_cls` attribute in Contract subclasses allow to use different
  Request classes in contracts, for example FormRequest ([#3383](https://github.com/scrapy/scrapy/issues/3383)).
* Fixed errback handling in contracts, e.g. for cases where a contract
  is executed for URL which returns non-200 response ([#3371](https://github.com/scrapy/scrapy/issues/3371)).

### Usability improvements

* more stats for RobotsTxtMiddleware ([#3100](https://github.com/scrapy/scrapy/issues/3100))
* INFO log level is used to show telnet host/port ([#3115](https://github.com/scrapy/scrapy/issues/3115))
* a message is added to IgnoreRequest in RobotsTxtMiddleware ([#3113](https://github.com/scrapy/scrapy/issues/3113))
* better validation of `url` argument in `Response.follow` ([#3131](https://github.com/scrapy/scrapy/issues/3131))
* non-zero exit code is returned from Scrapy commands when error happens
  on spider initialization ([#3226](https://github.com/scrapy/scrapy/issues/3226))
* Link extraction improvements: “ftp” is added to scheme list ([#3152](https://github.com/scrapy/scrapy/issues/3152));
  “flv” is added to common video extensions ([#3165](https://github.com/scrapy/scrapy/issues/3165))
* better error message when an exporter is disabled ([#3358](https://github.com/scrapy/scrapy/issues/3358));
* `scrapy shell --help` mentions syntax required for local files
  (`./file.html`) - [#3496](https://github.com/scrapy/scrapy/issues/3496).
* Referer header value is added to RFPDupeFilter log messages ([#3588](https://github.com/scrapy/scrapy/issues/3588))

### Bug fixes

* fixed issue with extra blank lines in .csv exports under Windows
  ([#3039](https://github.com/scrapy/scrapy/issues/3039));
* proper handling of pickling errors in Python 3 when serializing objects
  for disk queues ([#3082](https://github.com/scrapy/scrapy/issues/3082))
* flags are now preserved when copying Requests ([#3342](https://github.com/scrapy/scrapy/issues/3342));
* FormRequest.from_response clickdata shouldn’t ignore elements with
  `input[type=image]` ([#3153](https://github.com/scrapy/scrapy/issues/3153)).
* FormRequest.from_response should preserve duplicate keys ([#3247](https://github.com/scrapy/scrapy/issues/3247))

### Documentation improvements

* Docs are re-written to suggest .get/.getall API instead of
  .extract/.extract_first. Also, [Selectors](../topics/selectors.md) docs are updated
  and re-structured to match latest parsel docs; they now contain more topics,
  such as [Selecting element attributes](../topics/selectors.md) or [Extensions to CSS Selectors](../topics/selectors.md)
  ([#3390](https://github.com/scrapy/scrapy/issues/3390)).
* [Using your browser’s Developer Tools for scraping](../topics/developer-tools.md) is a new tutorial which replaces
  old Firefox and Firebug tutorials ([#3400](https://github.com/scrapy/scrapy/issues/3400)).
* SCRAPY_PROJECT environment variable is documented ([#3518](https://github.com/scrapy/scrapy/issues/3518));
* troubleshooting section is added to install instructions ([#3517](https://github.com/scrapy/scrapy/issues/3517));
* improved links to beginner resources in the tutorial
  ([#3367](https://github.com/scrapy/scrapy/issues/3367), [#3468](https://github.com/scrapy/scrapy/issues/3468));
* fixed [`RETRY_HTTP_CODES`](../topics/downloader-middleware.md) default values in docs ([#3335](https://github.com/scrapy/scrapy/issues/3335));
* remove unused `DEPTH_STATS` option from docs ([#3245](https://github.com/scrapy/scrapy/issues/3245));
* other cleanups ([#3347](https://github.com/scrapy/scrapy/issues/3347), [#3350](https://github.com/scrapy/scrapy/issues/3350), [#3445](https://github.com/scrapy/scrapy/issues/3445), [#3544](https://github.com/scrapy/scrapy/issues/3544),
  [#3605](https://github.com/scrapy/scrapy/issues/3605)).

### Deprecation removals

Compatibility shims for pre-1.0 Scrapy module names are removed
([#3318](https://github.com/scrapy/scrapy/issues/3318)):

* `scrapy.command`
* `scrapy.contrib` (with all submodules)
* `scrapy.contrib_exp` (with all submodules)
* `scrapy.dupefilter`
* `scrapy.linkextractor`
* `scrapy.project`
* `scrapy.spider`
* `scrapy.spidermanager`
* `scrapy.squeue`
* `scrapy.stats`
* `scrapy.statscol`
* `scrapy.utils.decorator`

See Module Relocations for more information, or use suggestions
from Scrapy 1.5.x deprecation warnings to update your code.

Other deprecation removals:

* Deprecated scrapy.interfaces.ISpiderManager is removed; please use
  scrapy.interfaces.ISpiderLoader.
* Deprecated `CrawlerSettings` class is removed ([#3327](https://github.com/scrapy/scrapy/issues/3327)).
* Deprecated `Settings.overrides` and `Settings.defaults` attributes
  are removed ([#3327](https://github.com/scrapy/scrapy/issues/3327), [#3359](https://github.com/scrapy/scrapy/issues/3359)).

### Other improvements, cleanups

* All Scrapy tests now pass on Windows; Scrapy testing suite is executed
  in a Windows environment on CI ([#3315](https://github.com/scrapy/scrapy/issues/3315)).
* Python 3.7 support ([#3326](https://github.com/scrapy/scrapy/issues/3326), [#3150](https://github.com/scrapy/scrapy/issues/3150), [#3547](https://github.com/scrapy/scrapy/issues/3547)).
* Testing and CI fixes ([#3526](https://github.com/scrapy/scrapy/issues/3526), [#3538](https://github.com/scrapy/scrapy/issues/3538), [#3308](https://github.com/scrapy/scrapy/issues/3308),
  [#3311](https://github.com/scrapy/scrapy/issues/3311), [#3309](https://github.com/scrapy/scrapy/issues/3309), [#3305](https://github.com/scrapy/scrapy/issues/3305), [#3210](https://github.com/scrapy/scrapy/issues/3210), [#3299](https://github.com/scrapy/scrapy/issues/3299))
* `scrapy.http.cookies.CookieJar.clear` accepts “domain”, “path” and “name”
  optional arguments ([#3231](https://github.com/scrapy/scrapy/issues/3231)).
* additional files are included to sdist ([#3495](https://github.com/scrapy/scrapy/issues/3495));
* code style fixes ([#3405](https://github.com/scrapy/scrapy/issues/3405), [#3304](https://github.com/scrapy/scrapy/issues/3304));
* unneeded .strip() call is removed ([#3519](https://github.com/scrapy/scrapy/issues/3519));
* collections.deque is used to store MiddlewareManager methods instead
  of a list ([#3476](https://github.com/scrapy/scrapy/issues/3476))

## Scrapy 1.5.2 (2019-01-22)

* *Security bugfix*: Telnet console extension can be easily exploited by rogue
  websites POSTing content to [http://localhost:6023](http://localhost:6023), we haven’t found a way to
  exploit it from Scrapy, but it is very easy to trick a browser to do so and
  elevates the risk for local development environment.

  *The fix is backward incompatible*, it enables telnet user-password
  authentication by default with a random generated password. If you can’t
  upgrade right away, please consider setting [`TELNETCONSOLE_PORT`](../topics/telnetconsole.md)
  out of its default value.

  See [telnet console](../topics/telnetconsole.md) documentation for more info
* Backport CI build failure under GCE environment due to boto import error.

## Scrapy 1.5.1 (2018-07-12)

This is a maintenance release with important bug fixes, but no new features:

* `O(N^2)` gzip decompression issue which affected Python 3 and PyPy
  is fixed ([#3281](https://github.com/scrapy/scrapy/issues/3281));
* skipping of TLS validation errors is improved ([#3166](https://github.com/scrapy/scrapy/issues/3166));
* Ctrl-C handling is fixed in Python 3.5+ ([#3096](https://github.com/scrapy/scrapy/issues/3096));
* testing fixes ([#3092](https://github.com/scrapy/scrapy/issues/3092), [#3263](https://github.com/scrapy/scrapy/issues/3263));
* documentation improvements ([#3058](https://github.com/scrapy/scrapy/issues/3058), [#3059](https://github.com/scrapy/scrapy/issues/3059), [#3089](https://github.com/scrapy/scrapy/issues/3089),
  [#3123](https://github.com/scrapy/scrapy/issues/3123), [#3127](https://github.com/scrapy/scrapy/issues/3127), [#3189](https://github.com/scrapy/scrapy/issues/3189), [#3224](https://github.com/scrapy/scrapy/issues/3224), [#3280](https://github.com/scrapy/scrapy/issues/3280),
  [#3279](https://github.com/scrapy/scrapy/issues/3279), [#3201](https://github.com/scrapy/scrapy/issues/3201), [#3260](https://github.com/scrapy/scrapy/issues/3260), [#3284](https://github.com/scrapy/scrapy/issues/3284), [#3298](https://github.com/scrapy/scrapy/issues/3298),
  [#3294](https://github.com/scrapy/scrapy/issues/3294)).

## Scrapy 1.5.0 (2017-12-29)

This release brings small new features and improvements across the codebase.
Some highlights:

* Google Cloud Storage is supported in FilesPipeline and ImagesPipeline.
* Crawling with proxy servers becomes more efficient, as connections
  to proxies can be reused now.
* Warnings, exception and logging messages are improved to make debugging
  easier.
* `scrapy parse` command now allows to set custom request meta via
  `--meta` argument.
* Compatibility with Python 3.6, PyPy and PyPy3 is improved;
  PyPy and PyPy3 are now supported officially, by running tests on CI.
* Better default handling of HTTP 308, 522 and 524 status codes.
* Documentation is improved, as usual.

### Backward Incompatible Changes

* Scrapy 1.5 drops support for Python 3.3.
* Default Scrapy User-Agent now uses https link to scrapy.org ([#2983](https://github.com/scrapy/scrapy/issues/2983)).
  **This is technically backward-incompatible**; override
  [`USER_AGENT`](../topics/settings.md) if you relied on old value.
* Logging of settings overridden by `custom_settings` is fixed;
  **this is technically backward-incompatible** because the logger
  changes from `[scrapy.utils.log]` to `[scrapy.crawler]`. If you’re
  parsing Scrapy logs, please update your log parsers ([#1343](https://github.com/scrapy/scrapy/issues/1343)).
* LinkExtractor now ignores `m4v` extension by default, this is change
  in behavior.
* 522 and 524 status codes are added to `RETRY_HTTP_CODES` ([#2851](https://github.com/scrapy/scrapy/issues/2851))

### New features

- Support `<link>` tags in `Response.follow` ([#2785](https://github.com/scrapy/scrapy/issues/2785))
- Support for `ptpython` REPL ([#2654](https://github.com/scrapy/scrapy/issues/2654))
- Google Cloud Storage support for FilesPipeline and ImagesPipeline
  ([#2923](https://github.com/scrapy/scrapy/issues/2923)).
- New `--meta` option of the “scrapy parse” command allows to pass additional
  request.meta ([#2883](https://github.com/scrapy/scrapy/issues/2883))
- Populate spider variable when using `shell.inspect_response` ([#2812](https://github.com/scrapy/scrapy/issues/2812))
- Handle HTTP 308 Permanent Redirect ([#2844](https://github.com/scrapy/scrapy/issues/2844))
- Add 522 and 524 to `RETRY_HTTP_CODES` ([#2851](https://github.com/scrapy/scrapy/issues/2851))
- Log versions information at startup ([#2857](https://github.com/scrapy/scrapy/issues/2857))
- `scrapy.mail.MailSender` now works in Python 3 (it requires Twisted 17.9.0)
- Connections to proxy servers are reused ([#2743](https://github.com/scrapy/scrapy/issues/2743))
- Add template for a downloader middleware ([#2755](https://github.com/scrapy/scrapy/issues/2755))
- Explicit message for NotImplementedError when parse callback not defined
  ([#2831](https://github.com/scrapy/scrapy/issues/2831))
- CrawlerProcess got an option to disable installation of root log handler
  ([#2921](https://github.com/scrapy/scrapy/issues/2921))
- LinkExtractor now ignores `m4v` extension by default
- Better log messages for responses over [`DOWNLOAD_WARNSIZE`](../topics/settings.md) and
  [`DOWNLOAD_MAXSIZE`](../topics/settings.md) limits ([#2927](https://github.com/scrapy/scrapy/issues/2927))
- Show warning when a URL is put to `Spider.allowed_domains` instead of
  a domain ([#2250](https://github.com/scrapy/scrapy/issues/2250)).

### Bug fixes

- Fix logging of settings overridden by `custom_settings`;
  **this is technically backward-incompatible** because the logger
  changes from `[scrapy.utils.log]` to `[scrapy.crawler]`, so please
  update your log parsers if needed ([#1343](https://github.com/scrapy/scrapy/issues/1343))
- Default Scrapy User-Agent now uses https link to scrapy.org ([#2983](https://github.com/scrapy/scrapy/issues/2983)).
  **This is technically backward-incompatible**; override
  [`USER_AGENT`](../topics/settings.md) if you relied on old value.
- Fix PyPy and PyPy3 test failures, support them officially
  ([#2793](https://github.com/scrapy/scrapy/issues/2793), [#2935](https://github.com/scrapy/scrapy/issues/2935), [#2990](https://github.com/scrapy/scrapy/issues/2990), [#3050](https://github.com/scrapy/scrapy/issues/3050), [#2213](https://github.com/scrapy/scrapy/issues/2213),
  [#3048](https://github.com/scrapy/scrapy/issues/3048))
- Fix DNS resolver when `DNSCACHE_ENABLED=False` ([#2811](https://github.com/scrapy/scrapy/issues/2811))
- Add `cryptography` for Debian Jessie tox test env ([#2848](https://github.com/scrapy/scrapy/issues/2848))
- Add verification to check if Request callback is callable ([#2766](https://github.com/scrapy/scrapy/issues/2766))
- Port `extras/qpsclient.py` to Python 3 ([#2849](https://github.com/scrapy/scrapy/issues/2849))
- Use getfullargspec under the scenes for Python 3 to stop DeprecationWarning
  ([#2862](https://github.com/scrapy/scrapy/issues/2862))
- Update deprecated test aliases ([#2876](https://github.com/scrapy/scrapy/issues/2876))
- Fix `SitemapSpider` support for alternate links ([#2853](https://github.com/scrapy/scrapy/issues/2853))

### Docs

- Added missing bullet point for the `AUTOTHROTTLE_TARGET_CONCURRENCY`
  setting. ([#2756](https://github.com/scrapy/scrapy/issues/2756))
- Update Contributing docs, document new support channels
  ([#2762](https://github.com/scrapy/scrapy/issues/2762), [#3038](https://github.com/scrapy/scrapy/issues/3038))
- Include references to Scrapy subreddit in the docs
- Fix broken links; use `https://` for external links
  ([#2978](https://github.com/scrapy/scrapy/issues/2978), [#2982](https://github.com/scrapy/scrapy/issues/2982), [#2958](https://github.com/scrapy/scrapy/issues/2958))
- Document CloseSpider extension better ([#2759](https://github.com/scrapy/scrapy/issues/2759))
- Use `pymongo.collection.Collection.insert_one()` in MongoDB example
  ([#2781](https://github.com/scrapy/scrapy/issues/2781))
- Spelling mistake and typos
  ([#2828](https://github.com/scrapy/scrapy/issues/2828), [#2837](https://github.com/scrapy/scrapy/issues/2837), [#2884](https://github.com/scrapy/scrapy/issues/2884), [#2924](https://github.com/scrapy/scrapy/issues/2924))
- Clarify `CSVFeedSpider.headers` documentation ([#2826](https://github.com/scrapy/scrapy/issues/2826))
- Document `DontCloseSpider` exception and clarify `spider_idle`
  ([#2791](https://github.com/scrapy/scrapy/issues/2791))
- Update “Releases” section in README ([#2764](https://github.com/scrapy/scrapy/issues/2764))
- Fix rst syntax in `DOWNLOAD_FAIL_ON_DATALOSS` docs ([#2763](https://github.com/scrapy/scrapy/issues/2763))
- Small fix in description of startproject arguments ([#2866](https://github.com/scrapy/scrapy/issues/2866))
- Clarify data types in Response.body docs ([#2922](https://github.com/scrapy/scrapy/issues/2922))
- Add a note about `request.meta['depth']` to DepthMiddleware docs ([#2374](https://github.com/scrapy/scrapy/issues/2374))
- Add a note about `request.meta['dont_merge_cookies']` to CookiesMiddleware
  docs ([#2999](https://github.com/scrapy/scrapy/issues/2999))
- Up-to-date example of project structure ([#2964](https://github.com/scrapy/scrapy/issues/2964), [#2976](https://github.com/scrapy/scrapy/issues/2976))
- A better example of ItemExporters usage ([#2989](https://github.com/scrapy/scrapy/issues/2989))
- Document `from_crawler` methods for spider and downloader middlewares
  ([#3019](https://github.com/scrapy/scrapy/issues/3019))

## Scrapy 1.4.0 (2017-05-18)

Scrapy 1.4 does not bring that many breathtaking new features
but quite a few handy improvements nonetheless.

Scrapy now supports anonymous FTP sessions with customizable user and
password via the new [`FTP_USER`](../topics/settings.md) and [`FTP_PASSWORD`](../topics/settings.md) settings.
And if you’re using Twisted version 17.1.0 or above, FTP is now available
with Python 3.

There’s a new [`response.follow`](../topics/request-response.md) method
for creating requests; **it is now a recommended way to create Requests
in Scrapy spiders**. This method makes it easier to write correct
spiders; `response.follow` has several advantages over creating
`scrapy.Request` objects directly:

* it handles relative URLs;
* it works properly with non-ascii URLs on non-UTF8 pages;
* in addition to absolute and relative URLs it supports Selectors;
  for `<a>` elements it can also extract their href values.

For example, instead of this:

```
for href in response.css('li.page a::attr(href)').extract():
    url = response.urljoin(href)
    yield scrapy.Request(url, self.parse, encoding=response.encoding)
```

One can now write this:

```
for a in response.css('li.page a'):
    yield response.follow(a, self.parse)
```

Link extractors are also improved. They work similarly to what a regular
modern browser would do: leading and trailing whitespace are removed
from attributes (think `href="   http://example.com"`) when building
`Link` objects. This whitespace-stripping also happens for `action`
attributes with `FormRequest`.

**Please also note that link extractors do not canonicalize URLs by default
anymore.** This was puzzling users every now and then, and it’s not what
browsers do in fact, so we removed that extra transformation on extracted
links.

For those of you wanting more control on the `Referer:` header that Scrapy
sends when following links, you can set your own `Referrer Policy`.
Prior to Scrapy 1.4, the default `RefererMiddleware` would simply and
blindly set it to the URL of the response that generated the HTTP request
(which could leak information on your URL seeds).
By default, Scrapy now behaves much like your regular browser does.
And this policy is fully customizable with W3C standard values
(or with something really custom of your own if you wish).
See [`REFERRER_POLICY`](../topics/spider-middleware.md) for details.

To make Scrapy spiders easier to debug, Scrapy logs more stats by default
in 1.4: memory usage stats, detailed retry stats, detailed HTTP error code
stats. A similar change is that HTTP cache path is also visible in logs now.

Last but not least, Scrapy now has the option to make JSON and XML items
more human-readable, with newlines between items and even custom indenting
offset, using the new [`FEED_EXPORT_INDENT`](../topics/feed-exports.md) setting.

Enjoy! (Or read on for the rest of changes in this release.)

### Deprecations and Backward Incompatible Changes

- Default to `canonicalize=False` in
  [`scrapy.linkextractors.LinkExtractor`](../topics/link-extractors.md)
  ([#2537](https://github.com/scrapy/scrapy/issues/2537), fixes [#1941](https://github.com/scrapy/scrapy/issues/1941) and [#1982](https://github.com/scrapy/scrapy/issues/1982)):
  **warning, this is technically backward-incompatible**
- Enable memusage extension by default ([#2539](https://github.com/scrapy/scrapy/issues/2539), fixes [#2187](https://github.com/scrapy/scrapy/issues/2187));
  **this is technically backward-incompatible** so please check if you have
  any non-default `MEMUSAGE_***` options set.
- `EDITOR` environment variable now takes precedence over `EDITOR`
  option defined in settings.py ([#1829](https://github.com/scrapy/scrapy/issues/1829)); Scrapy default settings
  no longer depend on environment variables. **This is technically a backward
  incompatible change**.
- `Spider.make_requests_from_url` is deprecated
  ([#1728](https://github.com/scrapy/scrapy/issues/1728), fixes [#1495](https://github.com/scrapy/scrapy/issues/1495)).

### New Features

- Accept proxy credentials in [`proxy`](../topics/downloader-middleware.md) request meta key ([#2526](https://github.com/scrapy/scrapy/issues/2526))
- Support [brotli-compressed](https://www.ietf.org/rfc/rfc7932.txt) content; requires optional [brotlipy](https://github.com/python-hyper/brotlipy/)
  ([#2535](https://github.com/scrapy/scrapy/issues/2535))
- New [response.follow](../intro/tutorial.md "A shortcut for creating Requests") shortcut
  for creating requests ([#1940](https://github.com/scrapy/scrapy/issues/1940))
- Added `flags` argument and attribute to [`Request`](../topics/request-response.md)
  objects ([#2047](https://github.com/scrapy/scrapy/issues/2047))
- Support Anonymous FTP ([#2342](https://github.com/scrapy/scrapy/issues/2342))
- Added `retry/count`, `retry/max_reached` and `retry/reason_count/<reason>`
  stats to [`RetryMiddleware`](../topics/downloader-middleware.md)
  ([#2543](https://github.com/scrapy/scrapy/issues/2543))
- Added `httperror/response_ignored_count` and `httperror/response_ignored_status_count/<status>`
  stats to [`HttpErrorMiddleware`](../topics/spider-middleware.md)
  ([#2566](https://github.com/scrapy/scrapy/issues/2566))
- Customizable [`Referrer policy`](../topics/spider-middleware.md) in
  [`RefererMiddleware`](../topics/spider-middleware.md)
  ([#2306](https://github.com/scrapy/scrapy/issues/2306))
- New `data:` URI download handler ([#2334](https://github.com/scrapy/scrapy/issues/2334), fixes [#2156](https://github.com/scrapy/scrapy/issues/2156))
- Log cache directory when HTTP Cache is used ([#2611](https://github.com/scrapy/scrapy/issues/2611), fixes [#2604](https://github.com/scrapy/scrapy/issues/2604))
- Warn users when project contains duplicate spider names (fixes [#2181](https://github.com/scrapy/scrapy/issues/2181))
- `scrapy.utils.datatypes.CaselessDict` now accepts `Mapping` instances and
  not only dicts ([#2646](https://github.com/scrapy/scrapy/issues/2646))
- [Media downloads](../topics/media-pipeline.md), with
  [`FilesPipeline`](../topics/media-pipeline.md) or
  [`ImagesPipeline`](../topics/media-pipeline.md), can now optionally handle
  HTTP redirects using the new [`MEDIA_ALLOW_REDIRECTS`](../topics/media-pipeline.md) setting
  ([#2616](https://github.com/scrapy/scrapy/issues/2616), fixes [#2004](https://github.com/scrapy/scrapy/issues/2004))
- Accept non-complete responses from websites using a new
  [`DOWNLOAD_FAIL_ON_DATALOSS`](../topics/settings.md) setting ([#2590](https://github.com/scrapy/scrapy/issues/2590), fixes [#2586](https://github.com/scrapy/scrapy/issues/2586))
- Optional pretty-printing of JSON and XML items via
  [`FEED_EXPORT_INDENT`](../topics/feed-exports.md) setting ([#2456](https://github.com/scrapy/scrapy/issues/2456), fixes [#1327](https://github.com/scrapy/scrapy/issues/1327))
- Allow dropping fields in `FormRequest.from_response` formdata when
  `None` value is passed ([#667](https://github.com/scrapy/scrapy/issues/667))
- Per-request retry times with the new [`max_retry_times`](../topics/request-response.md) meta key
  ([#2642](https://github.com/scrapy/scrapy/issues/2642))
- `python -m scrapy` as a more explicit alternative to `scrapy` command
  ([#2740](https://github.com/scrapy/scrapy/issues/2740))

### Bug fixes

- LinkExtractor now strips leading and trailing whitespaces from attributes
  ([#2547](https://github.com/scrapy/scrapy/issues/2547), fixes [#1614](https://github.com/scrapy/scrapy/issues/1614))
- Properly handle whitespaces in action attribute in
  [`FormRequest`](../topics/request-response.md) ([#2548](https://github.com/scrapy/scrapy/issues/2548))
- Buffer CONNECT response bytes from proxy until all HTTP headers are received
  ([#2495](https://github.com/scrapy/scrapy/issues/2495), fixes [#2491](https://github.com/scrapy/scrapy/issues/2491))
- FTP downloader now works on Python 3, provided you use Twisted>=17.1
  ([#2599](https://github.com/scrapy/scrapy/issues/2599))
- Use body to choose response type after decompressing content ([#2393](https://github.com/scrapy/scrapy/issues/2393),
  fixes [#2145](https://github.com/scrapy/scrapy/issues/2145))
- Always decompress `Content-Encoding: gzip` at [`HttpCompressionMiddleware`](../topics/downloader-middleware.md) stage ([#2391](https://github.com/scrapy/scrapy/issues/2391))
- Respect custom log level in `Spider.custom_settings` ([#2581](https://github.com/scrapy/scrapy/issues/2581),
  fixes [#1612](https://github.com/scrapy/scrapy/issues/1612))
- ‘make htmlview’ fix for macOS ([#2661](https://github.com/scrapy/scrapy/issues/2661))
- Remove “commands” from the command list  ([#2695](https://github.com/scrapy/scrapy/issues/2695))
- Fix duplicate Content-Length header for POST requests with empty body ([#2677](https://github.com/scrapy/scrapy/issues/2677))
- Properly cancel large downloads, i.e. above [`DOWNLOAD_MAXSIZE`](../topics/settings.md) ([#1616](https://github.com/scrapy/scrapy/issues/1616))
- ImagesPipeline: fixed processing of transparent PNG images with palette
  ([#2675](https://github.com/scrapy/scrapy/issues/2675))

### Cleanups & Refactoring

- Tests: remove temp files and folders ([#2570](https://github.com/scrapy/scrapy/issues/2570)),
  fixed ProjectUtilsTest on macOS ([#2569](https://github.com/scrapy/scrapy/issues/2569)),
  use portable pypy for Linux on Travis CI ([#2710](https://github.com/scrapy/scrapy/issues/2710))
- Separate building request from `_requests_to_follow` in CrawlSpider ([#2562](https://github.com/scrapy/scrapy/issues/2562))
- Remove “Python 3 progress” badge ([#2567](https://github.com/scrapy/scrapy/issues/2567))
- Add a couple more lines to `.gitignore` ([#2557](https://github.com/scrapy/scrapy/issues/2557))
- Remove bumpversion prerelease configuration ([#2159](https://github.com/scrapy/scrapy/issues/2159))
- Add codecov.yml file ([#2750](https://github.com/scrapy/scrapy/issues/2750))
- Set context factory implementation based on Twisted version ([#2577](https://github.com/scrapy/scrapy/issues/2577),
  fixes [#2560](https://github.com/scrapy/scrapy/issues/2560))
- Add omitted `self` arguments in default project middleware template ([#2595](https://github.com/scrapy/scrapy/issues/2595))
- Remove redundant `slot.add_request()` call in ExecutionEngine ([#2617](https://github.com/scrapy/scrapy/issues/2617))
- Catch more specific `os.error` exception in
  `scrapy.pipelines.files.FSFilesStore` ([#2644](https://github.com/scrapy/scrapy/issues/2644))
- Change “localhost” test server certificate ([#2720](https://github.com/scrapy/scrapy/issues/2720))
- Remove unused `MEMUSAGE_REPORT` setting ([#2576](https://github.com/scrapy/scrapy/issues/2576))

### Documentation

- Binary mode is required for exporters ([#2564](https://github.com/scrapy/scrapy/issues/2564), fixes [#2553](https://github.com/scrapy/scrapy/issues/2553))
- Mention issue with `FormRequest.from_response()` due to bug in lxml ([#2572](https://github.com/scrapy/scrapy/issues/2572))
- Use single quotes uniformly in templates ([#2596](https://github.com/scrapy/scrapy/issues/2596))
- Document [`ftp_user`](../topics/settings.md) and [`ftp_password`](../topics/settings.md) meta keys ([#2587](https://github.com/scrapy/scrapy/issues/2587))
- Removed section on deprecated `contrib/` ([#2636](https://github.com/scrapy/scrapy/issues/2636))
- Recommend Anaconda when installing Scrapy on Windows
  ([#2477](https://github.com/scrapy/scrapy/issues/2477), fixes [#2475](https://github.com/scrapy/scrapy/issues/2475))
- FAQ: rewrite note on Python 3 support on Windows ([#2690](https://github.com/scrapy/scrapy/issues/2690))
- Rearrange selector sections ([#2705](https://github.com/scrapy/scrapy/issues/2705))
- Remove `__nonzero__` from [`SelectorList`](../topics/selectors.md)
  docs ([#2683](https://github.com/scrapy/scrapy/issues/2683))
- Mention how to disable request filtering in documentation of
  [`DUPEFILTER_CLASS`](../topics/settings.md) setting ([#2714](https://github.com/scrapy/scrapy/issues/2714))
- Add sphinx_rtd_theme to docs setup readme ([#2668](https://github.com/scrapy/scrapy/issues/2668))
- Open file in text mode in JSON item writer example ([#2729](https://github.com/scrapy/scrapy/issues/2729))
- Clarify `allowed_domains` example ([#2670](https://github.com/scrapy/scrapy/issues/2670))

## Scrapy 1.3.3 (2017-03-10)

### Bug fixes

- Make `SpiderLoader` raise `ImportError` again by default for missing
  dependencies and wrong [`SPIDER_MODULES`](../topics/settings.md).
  These exceptions were silenced as warnings since 1.3.0.
  A new setting is introduced to toggle between warning or exception if needed ;
  see [`SPIDER_LOADER_WARN_ONLY`](../topics/settings.md) for details.

## Scrapy 1.3.2 (2017-02-13)

### Bug fixes

- Preserve request class when converting to/from dicts (utils.reqser) ([#2510](https://github.com/scrapy/scrapy/issues/2510)).
- Use consistent selectors for author field in tutorial ([#2551](https://github.com/scrapy/scrapy/issues/2551)).
- Fix TLS compatibility in Twisted 17+ ([#2558](https://github.com/scrapy/scrapy/issues/2558))

## Scrapy 1.3.1 (2017-02-08)

### New features

- Support `'True'` and `'False'` string values for boolean settings ([#2519](https://github.com/scrapy/scrapy/issues/2519));
  you can now do something like `scrapy crawl myspider -s REDIRECT_ENABLED=False`.
- Support kwargs with `response.xpath()` to use [XPath variables](../topics/selectors.md "Variables in XPath expressions")
  and ad-hoc namespaces declarations ;
  this requires at least Parsel v1.1 ([#2457](https://github.com/scrapy/scrapy/issues/2457)).
- Add support for Python 3.6 ([#2485](https://github.com/scrapy/scrapy/issues/2485)).
- Run tests on PyPy (warning: some tests still fail, so PyPy is not supported yet).

### Bug fixes

- Enforce `DNS_TIMEOUT` setting ([#2496](https://github.com/scrapy/scrapy/issues/2496)).
- Fix [`view`](../topics/commands.md) command ; it was a regression in v1.3.0 ([#2503](https://github.com/scrapy/scrapy/issues/2503)).
- Fix tests regarding `*_EXPIRES settings` with Files/Images pipelines ([#2460](https://github.com/scrapy/scrapy/issues/2460)).
- Fix name of generated pipeline class when using basic project template ([#2466](https://github.com/scrapy/scrapy/issues/2466)).
- Fix compatibility with Twisted 17+ ([#2496](https://github.com/scrapy/scrapy/issues/2496), [#2528](https://github.com/scrapy/scrapy/issues/2528)).
- Fix `scrapy.Item` inheritance on Python 3.6 ([#2511](https://github.com/scrapy/scrapy/issues/2511)).
- Enforce numeric values for components order in `SPIDER_MIDDLEWARES`,
  `DOWNLOADER_MIDDLEWARES`, `EXTENSIONS` and `SPIDER_CONTRACTS` ([#2420](https://github.com/scrapy/scrapy/issues/2420)).

### Documentation

- Reword Code of Conduct section and upgrade to Contributor Covenant v1.4
  ([#2469](https://github.com/scrapy/scrapy/issues/2469)).
- Clarify that passing spider arguments converts them to spider attributes
  ([#2483](https://github.com/scrapy/scrapy/issues/2483)).
- Document `formid` argument on `FormRequest.from_response()` ([#2497](https://github.com/scrapy/scrapy/issues/2497)).
- Add .rst extension to README files ([#2507](https://github.com/scrapy/scrapy/issues/2507)).
- Mention LevelDB cache storage backend ([#2525](https://github.com/scrapy/scrapy/issues/2525)).
- Use `yield` in sample callback code ([#2533](https://github.com/scrapy/scrapy/issues/2533)).
- Add note about HTML entities decoding with `.re()/.re_first()` ([#1704](https://github.com/scrapy/scrapy/issues/1704)).
- Typos ([#2512](https://github.com/scrapy/scrapy/issues/2512), [#2534](https://github.com/scrapy/scrapy/issues/2534), [#2531](https://github.com/scrapy/scrapy/issues/2531)).

### Cleanups

- Remove redundant check in `MetaRefreshMiddleware` ([#2542](https://github.com/scrapy/scrapy/issues/2542)).
- Faster checks in `LinkExtractor` for allow/deny patterns ([#2538](https://github.com/scrapy/scrapy/issues/2538)).
- Remove dead code supporting old Twisted versions ([#2544](https://github.com/scrapy/scrapy/issues/2544)).

## Scrapy 1.3.0 (2016-12-21)

This release comes rather soon after 1.2.2 for one main reason:
it was found out that releases since 0.18 up to 1.2.2 (included) use
some backported code from Twisted (`scrapy.xlib.tx.*`),
even if newer Twisted modules are available.
Scrapy now uses `twisted.web.client` and `twisted.internet.endpoints` directly.
(See also cleanups below.)

As it is a major change, we wanted to get the bug fix out quickly
while not breaking any projects using the 1.2 series.

### New Features

- `MailSender` now accepts single strings as values for `to` and `cc`
  arguments ([#2272](https://github.com/scrapy/scrapy/issues/2272))
- `scrapy fetch url`, `scrapy shell url` and `fetch(url)` inside
  Scrapy shell now follow HTTP redirections by default ([#2290](https://github.com/scrapy/scrapy/issues/2290));
  See [`fetch`](../topics/commands.md) and [`shell`](../topics/commands.md) for details.
- `HttpErrorMiddleware` now logs errors with `INFO` level instead of `DEBUG`;
  this is technically **backward incompatible** so please check your log parsers.
- By default, logger names now use a long-form path, e.g. `[scrapy.extensions.logstats]`,
  instead of the shorter “top-level” variant of prior releases (e.g. `[scrapy]`);
  this is **backward incompatible** if you have log parsers expecting the short
  logger name part. You can switch back to short logger names using [`LOG_SHORT_NAMES`](../topics/settings.md)
  set to `True`.

### Dependencies & Cleanups

- Scrapy now requires Twisted >= 13.1 which is the case for many Linux
  distributions already.
- As a consequence, we got rid of `scrapy.xlib.tx.*` modules, which
  copied some of Twisted code for users stuck with an “old” Twisted version
- `ChunkedTransferMiddleware` is deprecated and removed from the default
  downloader middlewares.

## Scrapy 1.2.3 (2017-03-03)

- Packaging fix: disallow unsupported Twisted versions in setup.py

## Scrapy 1.2.2 (2016-12-06)

### Bug fixes

- Fix a cryptic traceback when a pipeline fails on `open_spider()` ([#2011](https://github.com/scrapy/scrapy/issues/2011))
- Fix embedded IPython shell variables (fixing [#396](https://github.com/scrapy/scrapy/issues/396) that re-appeared
  in 1.2.0, fixed in [#2418](https://github.com/scrapy/scrapy/issues/2418))
- A couple of patches when dealing with robots.txt:
  - handle (non-standard) relative sitemap URLs ([#2390](https://github.com/scrapy/scrapy/issues/2390))
  - handle non-ASCII URLs and User-Agents in Python 2 ([#2373](https://github.com/scrapy/scrapy/issues/2373))

### Documentation

- Document `"download_latency"` key in `Request`’s `meta` dict ([#2033](https://github.com/scrapy/scrapy/issues/2033))
- Remove page on (deprecated & unsupported) Ubuntu packages from ToC ([#2335](https://github.com/scrapy/scrapy/issues/2335))
- A few fixed typos ([#2346](https://github.com/scrapy/scrapy/issues/2346), [#2369](https://github.com/scrapy/scrapy/issues/2369), [#2369](https://github.com/scrapy/scrapy/issues/2369), [#2380](https://github.com/scrapy/scrapy/issues/2380))
  and clarifications ([#2354](https://github.com/scrapy/scrapy/issues/2354), [#2325](https://github.com/scrapy/scrapy/issues/2325), [#2414](https://github.com/scrapy/scrapy/issues/2414))

### Other changes

- Advertize [conda-forge](https://anaconda.org/conda-forge/scrapy) as Scrapy’s official conda channel ([#2387](https://github.com/scrapy/scrapy/issues/2387))
- More helpful error messages when trying to use `.css()` or `.xpath()`
  on non-Text Responses ([#2264](https://github.com/scrapy/scrapy/issues/2264))
- `startproject` command now generates a sample `middlewares.py` file ([#2335](https://github.com/scrapy/scrapy/issues/2335))
- Add more dependencies’ version info in `scrapy version` verbose output ([#2404](https://github.com/scrapy/scrapy/issues/2404))
- Remove all `*.pyc` files from source distribution ([#2386](https://github.com/scrapy/scrapy/issues/2386))

## Scrapy 1.2.1 (2016-10-21)

### Bug fixes

- Include OpenSSL’s more permissive default ciphers when establishing
  TLS/SSL connections ([#2314](https://github.com/scrapy/scrapy/issues/2314)).
- Fix “Location” HTTP header decoding on non-ASCII URL redirects ([#2321](https://github.com/scrapy/scrapy/issues/2321)).

### Documentation

- Fix JsonWriterPipeline example ([#2302](https://github.com/scrapy/scrapy/issues/2302)).
- Various notes: [#2330](https://github.com/scrapy/scrapy/issues/2330) on spider names,
  [#2329](https://github.com/scrapy/scrapy/issues/2329) on middleware methods processing order,
  [#2327](https://github.com/scrapy/scrapy/issues/2327) on getting multi-valued HTTP headers as lists.

### Other changes

- Removed `www.` from `start_urls` in built-in spider templates ([#2299](https://github.com/scrapy/scrapy/issues/2299)).

## Scrapy 1.2.0 (2016-10-03)

### New Features

- New [`FEED_EXPORT_ENCODING`](../topics/feed-exports.md) setting to customize the encoding
  used when writing items to a file.
  This can be used to turn off `\uXXXX` escapes in JSON output.
  This is also useful for those wanting something else than UTF-8
  for XML or CSV output ([#2034](https://github.com/scrapy/scrapy/issues/2034)).
- `startproject` command now supports an optional destination directory
  to override the default one based on the project name ([#2005](https://github.com/scrapy/scrapy/issues/2005)).
- New [`SCHEDULER_DEBUG`](../topics/settings.md) setting to log requests serialization
  failures ([#1610](https://github.com/scrapy/scrapy/issues/1610)).
- JSON encoder now supports serialization of `set` instances ([#2058](https://github.com/scrapy/scrapy/issues/2058)).
- Interpret `application/json-amazonui-streaming` as `TextResponse` ([#1503](https://github.com/scrapy/scrapy/issues/1503)).
- `scrapy` is imported by default when using shell tools ([`shell`](../topics/commands.md),
  [inspect_response](../topics/shell.md "Invoking the shell from spiders to inspect responses")) ([#2248](https://github.com/scrapy/scrapy/issues/2248)).

### Bug fixes

- DefaultRequestHeaders middleware now runs before UserAgent middleware
  ([#2088](https://github.com/scrapy/scrapy/issues/2088)). **Warning: this is technically backward incompatible**,
  though we consider this a bug fix.
- HTTP cache extension and plugins that use the `.scrapy` data directory now
  work outside projects ([#1581](https://github.com/scrapy/scrapy/issues/1581)).  **Warning: this is technically
  backward incompatible**, though we consider this a bug fix.
- `Selector` does not allow passing both `response` and `text` anymore
  ([#2153](https://github.com/scrapy/scrapy/issues/2153)).
- Fixed logging of wrong callback name with `scrapy parse` ([#2169](https://github.com/scrapy/scrapy/issues/2169)).
- Fix for an odd gzip decompression bug ([#1606](https://github.com/scrapy/scrapy/issues/1606)).
- Fix for selected callbacks when using `CrawlSpider` with [`scrapy parse`](../topics/commands.md)
  ([#2225](https://github.com/scrapy/scrapy/issues/2225)).
- Fix for invalid JSON and XML files when spider yields no items ([#872](https://github.com/scrapy/scrapy/issues/872)).
- Implement `flush()` for `StreamLogger` avoiding a warning in logs ([#2125](https://github.com/scrapy/scrapy/issues/2125)).

### Refactoring

- `canonicalize_url` has been moved to [w3lib.url](https://w3lib.readthedocs.io/en/latest/w3lib.html#w3lib.url.canonicalize_url) ([#2168](https://github.com/scrapy/scrapy/issues/2168)).

### Tests & Requirements

Scrapy’s new requirements baseline is Debian 8 “Jessie”. It was previously
Ubuntu 12.04 Precise.
What this means in practice is that we run continuous integration tests
with these (main) packages versions at a minimum:
Twisted 14.0, pyOpenSSL 0.14, lxml 3.4.

Scrapy may very well work with older versions of these packages
(the code base still has switches for older Twisted versions for example)
but it is not guaranteed (because it’s not tested anymore).

### Documentation

- Grammar fixes: [#2128](https://github.com/scrapy/scrapy/issues/2128), [#1566](https://github.com/scrapy/scrapy/issues/1566).
- Download stats badge removed from README ([#2160](https://github.com/scrapy/scrapy/issues/2160)).
- New Scrapy [architecture diagram](../topics/architecture.md) ([#2165](https://github.com/scrapy/scrapy/issues/2165)).
- Updated `Response` parameters documentation ([#2197](https://github.com/scrapy/scrapy/issues/2197)).
- Reworded misleading `RANDOMIZE_DOWNLOAD_DELAY` description ([#2190](https://github.com/scrapy/scrapy/issues/2190)).
- Add StackOverflow as a support channel ([#2257](https://github.com/scrapy/scrapy/issues/2257)).

## Scrapy 1.1.4 (2017-03-03)

- Packaging fix: disallow unsupported Twisted versions in setup.py

## Scrapy 1.1.3 (2016-09-22)

### Bug fixes

- Class attributes for subclasses of `ImagesPipeline` and `FilesPipeline`
  work as they did before 1.1.1 ([#2243](https://github.com/scrapy/scrapy/issues/2243), fixes [#2198](https://github.com/scrapy/scrapy/issues/2198))

### Documentation

- [Overview](../intro/overview.md) and [tutorial](../intro/tutorial.md)
  rewritten to use [http://toscrape.com](http://toscrape.com) websites
  ([#2236](https://github.com/scrapy/scrapy/issues/2236), [#2249](https://github.com/scrapy/scrapy/issues/2249), [#2252](https://github.com/scrapy/scrapy/issues/2252)).

## Scrapy 1.1.2 (2016-08-18)

### Bug fixes

- Introduce a missing [`IMAGES_STORE_S3_ACL`](../topics/media-pipeline.md) setting to override
  the default ACL policy in `ImagesPipeline` when uploading images to S3
  (note that default ACL policy is “private” – instead of “public-read” –
  since Scrapy 1.1.0)
- [`IMAGES_EXPIRES`](../topics/media-pipeline.md) default value set back to 90
  (the regression was introduced in 1.1.1)

## Scrapy 1.1.1 (2016-07-13)

### Bug fixes

- Add “Host” header in CONNECT requests to HTTPS proxies ([#2069](https://github.com/scrapy/scrapy/issues/2069))
- Use response `body` when choosing response class
  ([#2001](https://github.com/scrapy/scrapy/issues/2001), fixes [#2000](https://github.com/scrapy/scrapy/issues/2000))
- Do not fail on canonicalizing URLs with wrong netlocs
  ([#2038](https://github.com/scrapy/scrapy/issues/2038), fixes [#2010](https://github.com/scrapy/scrapy/issues/2010))
- a few fixes for `HttpCompressionMiddleware` (and `SitemapSpider`):
  - Do not decode HEAD responses ([#2008](https://github.com/scrapy/scrapy/issues/2008), fixes [#1899](https://github.com/scrapy/scrapy/issues/1899))
  - Handle charset parameter in gzip Content-Type header
    ([#2050](https://github.com/scrapy/scrapy/issues/2050), fixes [#2049](https://github.com/scrapy/scrapy/issues/2049))
  - Do not decompress gzip octet-stream responses
    ([#2065](https://github.com/scrapy/scrapy/issues/2065), fixes [#2063](https://github.com/scrapy/scrapy/issues/2063))
- Catch (and ignore with a warning) exception when verifying certificate
  against IP-address hosts ([#2094](https://github.com/scrapy/scrapy/issues/2094), fixes [#2092](https://github.com/scrapy/scrapy/issues/2092))
- Make `FilesPipeline` and `ImagesPipeline` backward compatible again
  regarding the use of legacy class attributes for customization
  ([#1989](https://github.com/scrapy/scrapy/issues/1989), fixes [#1985](https://github.com/scrapy/scrapy/issues/1985))

### New features

- Enable genspider command outside project folder ([#2052](https://github.com/scrapy/scrapy/issues/2052))
- Retry HTTPS CONNECT `TunnelError` by default ([#1974](https://github.com/scrapy/scrapy/issues/1974))

### Documentation

- `FEED_TEMPDIR` setting at lexicographical position ([commit 9b3c72c](https://github.com/scrapy/scrapy/commit/9b3c72c))
- Use idiomatic `.extract_first()` in overview ([#1994](https://github.com/scrapy/scrapy/issues/1994))
- Update years in copyright notice ([commit c2c8036](https://github.com/scrapy/scrapy/commit/c2c8036))
- Add information and example on errbacks ([#1995](https://github.com/scrapy/scrapy/issues/1995))
- Use “url” variable in downloader middleware example ([#2015](https://github.com/scrapy/scrapy/issues/2015))
- Grammar fixes ([#2054](https://github.com/scrapy/scrapy/issues/2054), [#2120](https://github.com/scrapy/scrapy/issues/2120))
- New FAQ entry on using BeautifulSoup in spider callbacks ([#2048](https://github.com/scrapy/scrapy/issues/2048))
- Add notes about Scrapy not working on Windows with Python 3 ([#2060](https://github.com/scrapy/scrapy/issues/2060))
- Encourage complete titles in pull requests ([#2026](https://github.com/scrapy/scrapy/issues/2026))

### Tests

- Upgrade py.test requirement on Travis CI and Pin pytest-cov to 2.2.1 ([#2095](https://github.com/scrapy/scrapy/issues/2095))

## Scrapy 1.1.0 (2016-05-11)

This 1.1 release brings a lot of interesting features and bug fixes:

- Scrapy 1.1 has beta Python 3 support (requires Twisted >= 15.5). See
  Beta Python 3 Support for more details and some limitations.
- Hot new features:
  - Item loaders now support nested loaders ([#1467](https://github.com/scrapy/scrapy/issues/1467)).
  - `FormRequest.from_response` improvements ([#1382](https://github.com/scrapy/scrapy/issues/1382), [#1137](https://github.com/scrapy/scrapy/issues/1137)).
  - Added setting [`AUTOTHROTTLE_TARGET_CONCURRENCY`](../topics/autothrottle.md) and improved
    AutoThrottle docs ([#1324](https://github.com/scrapy/scrapy/issues/1324)).
  - Added `response.text` to get body as unicode ([#1730](https://github.com/scrapy/scrapy/issues/1730)).
  - Anonymous S3 connections ([#1358](https://github.com/scrapy/scrapy/issues/1358)).
  - Deferreds in downloader middlewares ([#1473](https://github.com/scrapy/scrapy/issues/1473)). This enables better
    robots.txt handling ([#1471](https://github.com/scrapy/scrapy/issues/1471)).
  - HTTP caching now follows RFC2616 more closely, added settings
    [`HTTPCACHE_ALWAYS_STORE`](../topics/downloader-middleware.md) and
    [`HTTPCACHE_IGNORE_RESPONSE_CACHE_CONTROLS`](../topics/downloader-middleware.md) ([#1151](https://github.com/scrapy/scrapy/issues/1151)).
  - Selectors were extracted to the [parsel](https://github.com/scrapy/parsel) library ([#1409](https://github.com/scrapy/scrapy/issues/1409)). This means
    you can use Scrapy Selectors without Scrapy and also upgrade the
    selectors engine without needing to upgrade Scrapy.
  - HTTPS downloader now does TLS protocol negotiation by default,
    instead of forcing TLS 1.0. You can also set the SSL/TLS method
    using the new `DOWNLOADER_CLIENT_TLS_METHOD` setting.
- These bug fixes may require your attention:
  - Don’t retry bad requests (HTTP 400) by default ([#1289](https://github.com/scrapy/scrapy/issues/1289)).
    If you need the old behavior, add `400` to [`RETRY_HTTP_CODES`](../topics/downloader-middleware.md).
  - Fix shell files argument handling ([#1710](https://github.com/scrapy/scrapy/issues/1710), [#1550](https://github.com/scrapy/scrapy/issues/1550)).
    If you try `scrapy shell index.html` it will try to load the URL `http://index.html`,
    use `scrapy shell ./index.html` to load a local file.
  - Robots.txt compliance is now enabled by default for newly-created projects
    ([#1724](https://github.com/scrapy/scrapy/issues/1724)). Scrapy will also wait for robots.txt to be downloaded
    before proceeding with the crawl ([#1735](https://github.com/scrapy/scrapy/issues/1735)). If you want to disable
    this behavior, update [`ROBOTSTXT_OBEY`](../topics/settings.md) in `settings.py` file
    after creating a new project.
  - Exporters now work on unicode, instead of bytes by default ([#1080](https://github.com/scrapy/scrapy/issues/1080)).
    If you use [`PythonItemExporter`](../topics/exporters.md), you may want to
    update your code to disable binary mode which is now deprecated.
  - Accept XML node names containing dots as valid ([#1533](https://github.com/scrapy/scrapy/issues/1533)).
  - When uploading files or images to S3 (with `FilesPipeline` or
    `ImagesPipeline`), the default ACL policy is now “private” instead
    of “public” **Warning: backward incompatible!**.
    You can use [`FILES_STORE_S3_ACL`](../topics/media-pipeline.md) to change it.
  - We’ve reimplemented `canonicalize_url()` for more correct output,
    especially for URLs with non-ASCII characters ([#1947](https://github.com/scrapy/scrapy/issues/1947)).
    This could change link extractors output compared to previous Scrapy versions.
    This may also invalidate some cache entries you could still have from pre-1.1 runs.
    **Warning: backward incompatible!**.

Keep reading for more details on other improvements and bug fixes.

### Beta Python 3 Support

We have been hard at work to make Scrapy run on Python 3. As a result, now
you can run spiders on Python 3.3, 3.4 and 3.5 (Twisted >= 15.5 required). Some
features are still missing (and some may never be ported).

Almost all builtin extensions/middlewares are expected to work.
However, we are aware of some limitations in Python 3:

- Scrapy does not work on Windows with Python 3
- Sending emails is not supported
- FTP download handler is not supported
- Telnet console is not supported

### Additional New Features and Enhancements

- Scrapy now has a [Code of Conduct](https://github.com/scrapy/scrapy/blob/master/CODE_OF_CONDUCT.md) ([#1681](https://github.com/scrapy/scrapy/issues/1681)).
- Command line tool now has completion for zsh ([#934](https://github.com/scrapy/scrapy/issues/934)).
- Improvements to `scrapy shell`:
  - Support for bpython and configure preferred Python shell via
    `SCRAPY_PYTHON_SHELL` ([#1100](https://github.com/scrapy/scrapy/issues/1100), [#1444](https://github.com/scrapy/scrapy/issues/1444)).
  - Support URLs without scheme ([#1498](https://github.com/scrapy/scrapy/issues/1498))
    **Warning: backward incompatible!**
  - Bring back support for relative file path ([#1710](https://github.com/scrapy/scrapy/issues/1710), [#1550](https://github.com/scrapy/scrapy/issues/1550)).
- Added [`MEMUSAGE_CHECK_INTERVAL_SECONDS`](../topics/settings.md) setting to change default check
  interval ([#1282](https://github.com/scrapy/scrapy/issues/1282)).
- Download handlers are now lazy-loaded on first request using their
  scheme ([#1390](https://github.com/scrapy/scrapy/issues/1390), [#1421](https://github.com/scrapy/scrapy/issues/1421)).
- HTTPS download handlers do not force TLS 1.0 anymore; instead,
  OpenSSL’s `SSLv23_method()/TLS_method()` is used allowing to try
  negotiating with the remote hosts the highest TLS protocol version
  it can ([#1794](https://github.com/scrapy/scrapy/issues/1794), [#1629](https://github.com/scrapy/scrapy/issues/1629)).
- `RedirectMiddleware` now skips the status codes from
  `handle_httpstatus_list` on spider attribute
  or in `Request`’s `meta` key ([#1334](https://github.com/scrapy/scrapy/issues/1334), [#1364](https://github.com/scrapy/scrapy/issues/1364),
  [#1447](https://github.com/scrapy/scrapy/issues/1447)).
- Form submission:
  - now works with `<button>` elements too ([#1469](https://github.com/scrapy/scrapy/issues/1469)).
  - an empty string is now used for submit buttons without a value
    ([#1472](https://github.com/scrapy/scrapy/issues/1472))
- Dict-like settings now have per-key priorities
  ([#1135](https://github.com/scrapy/scrapy/issues/1135), [#1149](https://github.com/scrapy/scrapy/issues/1149) and [#1586](https://github.com/scrapy/scrapy/issues/1586)).
- Sending non-ASCII emails ([#1662](https://github.com/scrapy/scrapy/issues/1662))
- `CloseSpider` and `SpiderState` extensions now get disabled if no relevant
  setting is set ([#1723](https://github.com/scrapy/scrapy/issues/1723), [#1725](https://github.com/scrapy/scrapy/issues/1725)).
- Added method `ExecutionEngine.close` ([#1423](https://github.com/scrapy/scrapy/issues/1423)).
- Added method `CrawlerRunner.create_crawler` ([#1528](https://github.com/scrapy/scrapy/issues/1528)).
- Scheduler priority queue can now be customized via
  [`SCHEDULER_PRIORITY_QUEUE`](../topics/settings.md) ([#1822](https://github.com/scrapy/scrapy/issues/1822)).
- `.pps` links are now ignored by default in link extractors ([#1835](https://github.com/scrapy/scrapy/issues/1835)).
- temporary data folder for FTP and S3 feed storages can be customized
  using a new [`FEED_TEMPDIR`](../topics/settings.md) setting ([#1847](https://github.com/scrapy/scrapy/issues/1847)).
- `FilesPipeline` and `ImagesPipeline` settings are now instance attributes
  instead of class attributes, enabling spider-specific behaviors ([#1891](https://github.com/scrapy/scrapy/issues/1891)).
- `JsonItemExporter` now formats opening and closing square brackets
  on their own line (first and last lines of output file) ([#1950](https://github.com/scrapy/scrapy/issues/1950)).
- If available, `botocore` is used for `S3FeedStorage`, `S3DownloadHandler`
  and `S3FilesStore` ([#1761](https://github.com/scrapy/scrapy/issues/1761), [#1883](https://github.com/scrapy/scrapy/issues/1883)).
- Tons of documentation updates and related fixes ([#1291](https://github.com/scrapy/scrapy/issues/1291), [#1302](https://github.com/scrapy/scrapy/issues/1302),
  [#1335](https://github.com/scrapy/scrapy/issues/1335), [#1683](https://github.com/scrapy/scrapy/issues/1683), [#1660](https://github.com/scrapy/scrapy/issues/1660), [#1642](https://github.com/scrapy/scrapy/issues/1642), [#1721](https://github.com/scrapy/scrapy/issues/1721),
  [#1727](https://github.com/scrapy/scrapy/issues/1727), [#1879](https://github.com/scrapy/scrapy/issues/1879)).
- Other refactoring, optimizations and cleanup ([#1476](https://github.com/scrapy/scrapy/issues/1476), [#1481](https://github.com/scrapy/scrapy/issues/1481),
  [#1477](https://github.com/scrapy/scrapy/issues/1477), [#1315](https://github.com/scrapy/scrapy/issues/1315), [#1290](https://github.com/scrapy/scrapy/issues/1290), [#1750](https://github.com/scrapy/scrapy/issues/1750), [#1881](https://github.com/scrapy/scrapy/issues/1881)).

### Deprecations and Removals

- Added `to_bytes` and `to_unicode`, deprecated `str_to_unicode` and
  `unicode_to_str` functions ([#778](https://github.com/scrapy/scrapy/issues/778)).
- `binary_is_text` is introduced, to replace use of `isbinarytext`
  (but with inverse return value) ([#1851](https://github.com/scrapy/scrapy/issues/1851))
- The `optional_features` set has been removed ([#1359](https://github.com/scrapy/scrapy/issues/1359)).
- The `--lsprof` command line option has been removed ([#1689](https://github.com/scrapy/scrapy/issues/1689)).
  **Warning: backward incompatible**, but doesn’t break user code.
- The following datatypes were deprecated ([#1720](https://github.com/scrapy/scrapy/issues/1720)):
  + `scrapy.utils.datatypes.MultiValueDictKeyError`
  + `scrapy.utils.datatypes.MultiValueDict`
  + `scrapy.utils.datatypes.SiteNode`
- The previously bundled `scrapy.xlib.pydispatch` library was deprecated and
  replaced by [pydispatcher](https://pypi.org/project/PyDispatcher/).

### Relocations

- `telnetconsole` was relocated to `extensions/` ([#1524](https://github.com/scrapy/scrapy/issues/1524)).
  + Note: telnet is not enabled on Python 3
    ([https://github.com/scrapy/scrapy/pull/1524#issuecomment-146985595](https://github.com/scrapy/scrapy/pull/1524#issuecomment-146985595))

### Bugfixes

- Scrapy does not retry requests that got a `HTTP 400 Bad Request`
  response anymore ([#1289](https://github.com/scrapy/scrapy/issues/1289)). **Warning: backward incompatible!**
- Support empty password for http_proxy config ([#1274](https://github.com/scrapy/scrapy/issues/1274)).
- Interpret `application/x-json` as `TextResponse` ([#1333](https://github.com/scrapy/scrapy/issues/1333)).
- Support link rel attribute with multiple values ([#1201](https://github.com/scrapy/scrapy/issues/1201)).
- Fixed `scrapy.FormRequest.from_response` when there is a `<base>`
  tag ([#1564](https://github.com/scrapy/scrapy/issues/1564)).
- Fixed [`TEMPLATES_DIR`](../topics/settings.md) handling ([#1575](https://github.com/scrapy/scrapy/issues/1575)).
- Various `FormRequest` fixes ([#1595](https://github.com/scrapy/scrapy/issues/1595), [#1596](https://github.com/scrapy/scrapy/issues/1596), [#1597](https://github.com/scrapy/scrapy/issues/1597)).
- Makes `_monkeypatches` more robust ([#1634](https://github.com/scrapy/scrapy/issues/1634)).
- Fixed bug on `XMLItemExporter` with non-string fields in
  items ([#1738](https://github.com/scrapy/scrapy/issues/1738)).
- Fixed startproject command in macOS ([#1635](https://github.com/scrapy/scrapy/issues/1635)).
- Fixed [`PythonItemExporter`](../topics/exporters.md) and CSVExporter for
  non-string item types ([#1737](https://github.com/scrapy/scrapy/issues/1737)).
- Various logging related fixes ([#1294](https://github.com/scrapy/scrapy/issues/1294), [#1419](https://github.com/scrapy/scrapy/issues/1419), [#1263](https://github.com/scrapy/scrapy/issues/1263),
  [#1624](https://github.com/scrapy/scrapy/issues/1624), [#1654](https://github.com/scrapy/scrapy/issues/1654), [#1722](https://github.com/scrapy/scrapy/issues/1722), [#1726](https://github.com/scrapy/scrapy/issues/1726) and [#1303](https://github.com/scrapy/scrapy/issues/1303)).
- Fixed bug in `utils.template.render_templatefile()` ([#1212](https://github.com/scrapy/scrapy/issues/1212)).
- sitemaps extraction from `robots.txt` is now case-insensitive ([#1902](https://github.com/scrapy/scrapy/issues/1902)).
- HTTPS+CONNECT tunnels could get mixed up when using multiple proxies
  to same remote host ([#1912](https://github.com/scrapy/scrapy/issues/1912)).

## Scrapy 1.0.7 (2017-03-03)

- Packaging fix: disallow unsupported Twisted versions in setup.py

## Scrapy 1.0.6 (2016-05-04)

- FIX: RetryMiddleware is now robust to non-standard HTTP status codes ([#1857](https://github.com/scrapy/scrapy/issues/1857))
- FIX: Filestorage HTTP cache was checking wrong modified time ([#1875](https://github.com/scrapy/scrapy/issues/1875))
- DOC: Support for Sphinx 1.4+ ([#1893](https://github.com/scrapy/scrapy/issues/1893))
- DOC: Consistency in selectors examples ([#1869](https://github.com/scrapy/scrapy/issues/1869))

## Scrapy 1.0.5 (2016-02-04)

- FIX: [Backport] Ignore bogus links in LinkExtractors (fixes [#907](https://github.com/scrapy/scrapy/issues/907), [commit 108195e](https://github.com/scrapy/scrapy/commit/108195e))
- TST: Changed buildbot makefile to use ‘pytest’ ([commit 1f3d90a](https://github.com/scrapy/scrapy/commit/1f3d90a))
- DOC: Fixed typos in tutorial and media-pipeline ([commit 808a9ea](https://github.com/scrapy/scrapy/commit/808a9ea) and [commit 803bd87](https://github.com/scrapy/scrapy/commit/803bd87))
- DOC: Add AjaxCrawlMiddleware to DOWNLOADER_MIDDLEWARES_BASE in settings docs ([commit aa94121](https://github.com/scrapy/scrapy/commit/aa94121))

## Scrapy 1.0.4 (2015-12-30)

- Ignoring xlib/tx folder, depending on Twisted version. ([commit 7dfa979](https://github.com/scrapy/scrapy/commit/7dfa979))
- Run on new travis-ci infra ([commit 6e42f0b](https://github.com/scrapy/scrapy/commit/6e42f0b))
- Spelling fixes ([commit 823a1cc](https://github.com/scrapy/scrapy/commit/823a1cc))
- escape nodename in xmliter regex ([commit da3c155](https://github.com/scrapy/scrapy/commit/da3c155))
- test xml nodename with dots ([commit 4418fc3](https://github.com/scrapy/scrapy/commit/4418fc3))
- TST don’t use broken Pillow version in tests ([commit a55078c](https://github.com/scrapy/scrapy/commit/a55078c))
- disable log on version command. closes #1426 ([commit 86fc330](https://github.com/scrapy/scrapy/commit/86fc330))
- disable log on startproject command ([commit db4c9fe](https://github.com/scrapy/scrapy/commit/db4c9fe))
- Add PyPI download stats badge ([commit df2b944](https://github.com/scrapy/scrapy/commit/df2b944))
- don’t run tests twice on Travis if a PR is made from a scrapy/scrapy branch ([commit a83ab41](https://github.com/scrapy/scrapy/commit/a83ab41))
- Add Python 3 porting status badge to the README ([commit 73ac80d](https://github.com/scrapy/scrapy/commit/73ac80d))
- fixed RFPDupeFilter persistence ([commit 97d080e](https://github.com/scrapy/scrapy/commit/97d080e))
- TST a test to show that dupefilter persistence is not working ([commit 97f2fb3](https://github.com/scrapy/scrapy/commit/97f2fb3))
- explicit close file on [file://](file://) scheme handler ([commit d9b4850](https://github.com/scrapy/scrapy/commit/d9b4850))
- Disable dupefilter in shell ([commit c0d0734](https://github.com/scrapy/scrapy/commit/c0d0734))
- DOC: Add captions to toctrees which appear in sidebar ([commit aa239ad](https://github.com/scrapy/scrapy/commit/aa239ad))
- DOC Removed pywin32 from install instructions as it’s already declared as dependency. ([commit 10eb400](https://github.com/scrapy/scrapy/commit/10eb400))
- Added installation notes about using Conda for Windows and other OSes. ([commit 1c3600a](https://github.com/scrapy/scrapy/commit/1c3600a))
- Fixed minor grammar issues. ([commit 7f4ddd5](https://github.com/scrapy/scrapy/commit/7f4ddd5))
- fixed a typo in the documentation. ([commit b71f677](https://github.com/scrapy/scrapy/commit/b71f677))
- Version 1 now exists ([commit 5456c0e](https://github.com/scrapy/scrapy/commit/5456c0e))
- fix another invalid xpath error ([commit 0a1366e](https://github.com/scrapy/scrapy/commit/0a1366e))
- fix ValueError: Invalid XPath: //div/[id=”not-exists”]/text() on selectors.rst ([commit ca8d60f](https://github.com/scrapy/scrapy/commit/ca8d60f))
- Typos corrections ([commit 7067117](https://github.com/scrapy/scrapy/commit/7067117))
- fix typos in downloader-middleware.rst and exceptions.rst, middlware -> middleware ([commit 32f115c](https://github.com/scrapy/scrapy/commit/32f115c))
- Add note to Ubuntu install section about Debian compatibility ([commit 23fda69](https://github.com/scrapy/scrapy/commit/23fda69))
- Replace alternative macOS install workaround with virtualenv ([commit 98b63ee](https://github.com/scrapy/scrapy/commit/98b63ee))
- Reference Homebrew’s homepage for installation instructions ([commit 1925db1](https://github.com/scrapy/scrapy/commit/1925db1))
- Add oldest supported tox version to contributing docs ([commit 5d10d6d](https://github.com/scrapy/scrapy/commit/5d10d6d))
- Note in install docs about pip being already included in python>=2.7.9 ([commit 85c980e](https://github.com/scrapy/scrapy/commit/85c980e))
- Add non-python dependencies to Ubuntu install section in the docs ([commit fbd010d](https://github.com/scrapy/scrapy/commit/fbd010d))
- Add macOS installation section to docs ([commit d8f4cba](https://github.com/scrapy/scrapy/commit/d8f4cba))
- DOC(ENH): specify path to rtd theme explicitly ([commit de73b1a](https://github.com/scrapy/scrapy/commit/de73b1a))
- minor: scrapy.Spider docs grammar ([commit 1ddcc7b](https://github.com/scrapy/scrapy/commit/1ddcc7b))
- Make common practices sample code match the comments ([commit 1b85bcf](https://github.com/scrapy/scrapy/commit/1b85bcf))
- nextcall repetitive calls (heartbeats). ([commit 55f7104](https://github.com/scrapy/scrapy/commit/55f7104))
- Backport fix compatibility with Twisted 15.4.0 ([commit b262411](https://github.com/scrapy/scrapy/commit/b262411))
- pin pytest to 2.7.3 ([commit a6535c2](https://github.com/scrapy/scrapy/commit/a6535c2))
- Merge pull request #1512 from mgedmin/patch-1 ([commit 8876111](https://github.com/scrapy/scrapy/commit/8876111))
- Merge pull request #1513 from mgedmin/patch-2 ([commit 5d4daf8](https://github.com/scrapy/scrapy/commit/5d4daf8))
- Typo ([commit f8d0682](https://github.com/scrapy/scrapy/commit/f8d0682))
- Fix list formatting ([commit 5f83a93](https://github.com/scrapy/scrapy/commit/5f83a93))
- fix Scrapy squeue tests after recent changes to queuelib ([commit 3365c01](https://github.com/scrapy/scrapy/commit/3365c01))
- Merge pull request #1475 from rweindl/patch-1 ([commit 2d688cd](https://github.com/scrapy/scrapy/commit/2d688cd))
- Update tutorial.rst ([commit fbc1f25](https://github.com/scrapy/scrapy/commit/fbc1f25))
- Merge pull request #1449 from rhoekman/patch-1 ([commit 7d6538c](https://github.com/scrapy/scrapy/commit/7d6538c))
- Small grammatical change ([commit 8752294](https://github.com/scrapy/scrapy/commit/8752294))
- Add openssl version to version command ([commit 13c45ac](https://github.com/scrapy/scrapy/commit/13c45ac))

## Scrapy 1.0.3 (2015-08-11)

- add service_identity to Scrapy install_requires ([commit cbc2501](https://github.com/scrapy/scrapy/commit/cbc2501))
- Workaround for travis#296 ([commit 66af9cd](https://github.com/scrapy/scrapy/commit/66af9cd))

## Scrapy 1.0.2 (2015-08-06)

- Twisted 15.3.0 does not raises PicklingError serializing lambda functions ([commit b04dd7d](https://github.com/scrapy/scrapy/commit/b04dd7d))
- Minor method name fix ([commit 6f85c7f](https://github.com/scrapy/scrapy/commit/6f85c7f))
- minor: scrapy.Spider grammar and clarity ([commit 9c9d2e0](https://github.com/scrapy/scrapy/commit/9c9d2e0))
- Put a blurb about support channels in CONTRIBUTING ([commit c63882b](https://github.com/scrapy/scrapy/commit/c63882b))
- Fixed typos ([commit a9ae7b0](https://github.com/scrapy/scrapy/commit/a9ae7b0))
- Fix doc reference. ([commit 7c8a4fe](https://github.com/scrapy/scrapy/commit/7c8a4fe))

## Scrapy 1.0.1 (2015-07-01)

- Unquote request path before passing to FTPClient, it already escape paths ([commit cc00ad2](https://github.com/scrapy/scrapy/commit/cc00ad2))
- include tests/ to source distribution in MANIFEST.in ([commit eca227e](https://github.com/scrapy/scrapy/commit/eca227e))
- DOC Fix SelectJmes documentation ([commit b8567bc](https://github.com/scrapy/scrapy/commit/b8567bc))
- DOC Bring Ubuntu and Archlinux outside of Windows subsection ([commit 392233f](https://github.com/scrapy/scrapy/commit/392233f))
- DOC remove version suffix from Ubuntu package ([commit 5303c66](https://github.com/scrapy/scrapy/commit/5303c66))
- DOC Update release date for 1.0 ([commit c89fa29](https://github.com/scrapy/scrapy/commit/c89fa29))

## Scrapy 1.0.0 (2015-06-19)

You will find a lot of new features and bugfixes in this major release.  Make
sure to check our updated [overview](../intro/overview.md) to get a glance of
some of the changes, along with our brushed [tutorial](../intro/tutorial.md).

### Support for returning dictionaries in spiders

Declaring and returning Scrapy Items is no longer necessary to collect the
scraped data from your spider, you can now return explicit dictionaries
instead.

*Classic version*

```
class MyItem(scrapy.Item):
    url = scrapy.Field()

class MySpider(scrapy.Spider):
    def parse(self, response):
        return MyItem(url=response.url)
```

*New version*

```
class MySpider(scrapy.Spider):
    def parse(self, response):
        return {'url': response.url}
```

### Per-spider settings (GSoC 2014)

Last Google Summer of Code project accomplished an important redesign of the
mechanism used for populating settings, introducing explicit priorities to
override any given setting. As an extension of that goal, we included a new
level of priority for settings that act exclusively for a single spider,
allowing them to redefine project settings.

Start using it by defining a `custom_settings`
class variable in your spider:

```
class MySpider(scrapy.Spider):
    custom_settings = {
        "DOWNLOAD_DELAY": 5.0,
        "RETRY_ENABLED": False,
    }
```

Read more about settings population: [Settings](../topics/settings.md)

### Python Logging

Scrapy 1.0 has moved away from Twisted logging to support Python built in’s
as default logging system. We’re maintaining backward compatibility for most
of the old custom interface to call logging functions, but you’ll get
warnings to switch to the Python logging API entirely.

*Old version*

```
from scrapy import log
log.msg('MESSAGE', log.INFO)
```

*New version*

```
import logging
logging.info('MESSAGE')
```

Logging with spiders remains the same, but on top of the
`log()` method you’ll have access to a custom
`logger` created for the spider to issue log
events:

```
class MySpider(scrapy.Spider):
    def parse(self, response):
        self.logger.info('Response received')
```

Read more in the logging documentation: [Logging](../topics/logging.md)

### Crawler API refactoring (GSoC 2014)

Another milestone for last Google Summer of Code was a refactoring of the
internal API, seeking a simpler and easier usage. Check new core interface
in: [Core API](../topics/api.md)

A common situation where you will face these changes is while running Scrapy
from scripts. Here’s a quick example of how to run a Spider manually with the
new API:

```
from scrapy.crawler import CrawlerProcess

process = CrawlerProcess({
    'USER_AGENT': 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)'
})
process.crawl(MySpider)
process.start()
```

Bear in mind this feature is still under development and its API may change
until it reaches a stable status.

See more examples for scripts running Scrapy: [Common Practices](../topics/practices.md)

### Module Relocations

There’s been a large rearrangement of modules trying to improve the general
structure of Scrapy. Main changes were separating various subpackages into
new projects and dissolving both `scrapy.contrib` and `scrapy.contrib_exp`
into top level packages. Backward compatibility was kept among internal
relocations, while importing deprecated modules expect warnings indicating
their new place.

#### Full list of relocations

Outsourced packages

> [!NOTE]
> These extensions went through some minor changes, e.g. some setting names
> were changed. Please check the documentation in each new repository to
> get familiar with the new usage.

| Old location              | New location                                                                                                                       |
|---------------------------|------------------------------------------------------------------------------------------------------------------------------------|
| scrapy.commands.deploy    | [scrapyd-client](https://github.com/scrapy/scrapyd-client) (See other alternatives here: [Deploying Spiders](../topics/deploy.md)) |
| scrapy.contrib.djangoitem | [scrapy-djangoitem](https://github.com/scrapy-plugins/scrapy-djangoitem)                                                           |
| scrapy.webservice         | [scrapy-jsonrpc](https://github.com/scrapy-plugins/scrapy-jsonrpc)                                                                 |

`scrapy.contrib_exp` and `scrapy.contrib` dissolutions

| Old location                                                                                                                                                                                                                                                                                            | New location                               |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------|
| scrapy.contrib_exp.downloadermiddleware.decompression                                                                                                                                                                                                                                                   | scrapy.downloadermiddlewares.decompression |
| scrapy.contrib_exp.iterators                                                                                                                                                                                                                                                                            | scrapy.utils.iterators                     |
| scrapy.contrib.downloadermiddleware                                                                                                                                                                                                                                                                     | scrapy.downloadermiddlewares               |
| scrapy.contrib.exporter                                                                                                                                                                                                                                                                                 | scrapy.exporters                           |
| scrapy.contrib.linkextractors                                                                                                                                                                                                                                                                           | scrapy.linkextractors                      |
| scrapy.contrib.loader                                                                                                                                                                                                                                                                                   | scrapy.loader                              |
| scrapy.contrib.loader.processor                                                                                                                                                                                                                                                                         | scrapy.loader.processors                   |
| scrapy.contrib.pipeline                                                                                                                                                                                                                                                                                 | scrapy.pipelines                           |
| scrapy.contrib.spidermiddleware                                                                                                                                                                                                                                                                         | scrapy.spidermiddlewares                   |
| scrapy.contrib.spiders                                                                                                                                                                                                                                                                                  | scrapy.spiders                             |
| * scrapy.contrib.closespider * scrapy.contrib.corestats * scrapy.contrib.debug * scrapy.contrib.feedexport * scrapy.contrib.httpcache * scrapy.contrib.logstats * scrapy.contrib.memdebug * scrapy.contrib.memusage * scrapy.contrib.spiderstate * scrapy.contrib.statsmailer * scrapy.contrib.throttle | scrapy.extensions.\*                       |

Plural renames and Modules unification

| Old location           | New location            |
|------------------------|-------------------------|
| scrapy.command         | scrapy.commands         |
| scrapy.dupefilter      | scrapy.dupefilters      |
| scrapy.linkextractor   | scrapy.linkextractors   |
| scrapy.spider          | scrapy.spiders          |
| scrapy.squeue          | scrapy.squeues          |
| scrapy.statscol        | scrapy.statscollectors  |
| scrapy.utils.decorator | scrapy.utils.decorators |

Class renames

| Old location                       | New location                     |
|------------------------------------|----------------------------------|
| scrapy.spidermanager.SpiderManager | scrapy.spiderloader.SpiderLoader |

Settings renames

| Old location         | New location        |
|----------------------|---------------------|
| SPIDER_MANAGER_CLASS | SPIDER_LOADER_CLASS |

### Changelog

New Features and Enhancements

- Python logging ([#1060](https://github.com/scrapy/scrapy/issues/1060), [#1235](https://github.com/scrapy/scrapy/issues/1235), [#1236](https://github.com/scrapy/scrapy/issues/1236), [#1240](https://github.com/scrapy/scrapy/issues/1240),
  [#1259](https://github.com/scrapy/scrapy/issues/1259), [#1278](https://github.com/scrapy/scrapy/issues/1278), [#1286](https://github.com/scrapy/scrapy/issues/1286))
- FEED_EXPORT_FIELDS option ([#1159](https://github.com/scrapy/scrapy/issues/1159), [#1224](https://github.com/scrapy/scrapy/issues/1224))
- Dns cache size and timeout options ([#1132](https://github.com/scrapy/scrapy/issues/1132))
- support namespace prefix in xmliter_lxml ([#963](https://github.com/scrapy/scrapy/issues/963))
- Reactor threadpool max size setting ([#1123](https://github.com/scrapy/scrapy/issues/1123))
- Allow spiders to return dicts. ([#1081](https://github.com/scrapy/scrapy/issues/1081))
- Add Response.urljoin() helper ([#1086](https://github.com/scrapy/scrapy/issues/1086))
- look in ~/.config/scrapy.cfg for user config ([#1098](https://github.com/scrapy/scrapy/issues/1098))
- handle TLS SNI ([#1101](https://github.com/scrapy/scrapy/issues/1101))
- Selectorlist extract first ([#624](https://github.com/scrapy/scrapy/issues/624), [#1145](https://github.com/scrapy/scrapy/issues/1145))
- Added JmesSelect ([#1016](https://github.com/scrapy/scrapy/issues/1016))
- add gzip compression to filesystem http cache backend ([#1020](https://github.com/scrapy/scrapy/issues/1020))
- CSS support in link extractors ([#983](https://github.com/scrapy/scrapy/issues/983))
- httpcache dont_cache meta #19 #689 ([#821](https://github.com/scrapy/scrapy/issues/821))
- add signal to be sent when request is dropped by the scheduler
  ([#961](https://github.com/scrapy/scrapy/issues/961))
- avoid download large response ([#946](https://github.com/scrapy/scrapy/issues/946))
- Allow to specify the quotechar in CSVFeedSpider ([#882](https://github.com/scrapy/scrapy/issues/882))
- Add referer to “Spider error processing” log message ([#795](https://github.com/scrapy/scrapy/issues/795))
- process robots.txt once ([#896](https://github.com/scrapy/scrapy/issues/896))
- GSoC Per-spider settings ([#854](https://github.com/scrapy/scrapy/issues/854))
- Add project name validation ([#817](https://github.com/scrapy/scrapy/issues/817))
- GSoC API cleanup ([#816](https://github.com/scrapy/scrapy/issues/816), [#1128](https://github.com/scrapy/scrapy/issues/1128), [#1147](https://github.com/scrapy/scrapy/issues/1147),
  [#1148](https://github.com/scrapy/scrapy/issues/1148), [#1156](https://github.com/scrapy/scrapy/issues/1156), [#1185](https://github.com/scrapy/scrapy/issues/1185), [#1187](https://github.com/scrapy/scrapy/issues/1187), [#1258](https://github.com/scrapy/scrapy/issues/1258),
  [#1268](https://github.com/scrapy/scrapy/issues/1268), [#1276](https://github.com/scrapy/scrapy/issues/1276), [#1285](https://github.com/scrapy/scrapy/issues/1285), [#1284](https://github.com/scrapy/scrapy/issues/1284))
- Be more responsive with IO operations ([#1074](https://github.com/scrapy/scrapy/issues/1074) and [#1075](https://github.com/scrapy/scrapy/issues/1075))
- Do leveldb compaction for httpcache on closing ([#1297](https://github.com/scrapy/scrapy/issues/1297))

Deprecations and Removals

- Deprecate htmlparser link extractor ([#1205](https://github.com/scrapy/scrapy/issues/1205))
- remove deprecated code from FeedExporter ([#1155](https://github.com/scrapy/scrapy/issues/1155))
- a leftover for.15 compatibility ([#925](https://github.com/scrapy/scrapy/issues/925))
- drop support for CONCURRENT_REQUESTS_PER_SPIDER ([#895](https://github.com/scrapy/scrapy/issues/895))
- Drop old engine code ([#911](https://github.com/scrapy/scrapy/issues/911))
- Deprecate SgmlLinkExtractor ([#777](https://github.com/scrapy/scrapy/issues/777))

Relocations

- Move exporters/_\_init_\_.py to exporters.py ([#1242](https://github.com/scrapy/scrapy/issues/1242))
- Move base classes to their packages ([#1218](https://github.com/scrapy/scrapy/issues/1218), [#1233](https://github.com/scrapy/scrapy/issues/1233))
- Module relocation ([#1181](https://github.com/scrapy/scrapy/issues/1181), [#1210](https://github.com/scrapy/scrapy/issues/1210))
- rename SpiderManager to SpiderLoader ([#1166](https://github.com/scrapy/scrapy/issues/1166))
- Remove djangoitem ([#1177](https://github.com/scrapy/scrapy/issues/1177))
- remove scrapy deploy command ([#1102](https://github.com/scrapy/scrapy/issues/1102))
- dissolve contrib_exp ([#1134](https://github.com/scrapy/scrapy/issues/1134))
- Deleted bin folder from root, fixes #913 ([#914](https://github.com/scrapy/scrapy/issues/914))
- Remove jsonrpc based webservice ([#859](https://github.com/scrapy/scrapy/issues/859))
- Move Test cases under project root dir ([#827](https://github.com/scrapy/scrapy/issues/827), [#841](https://github.com/scrapy/scrapy/issues/841))
- Fix backward incompatibility for relocated paths in settings
  ([#1267](https://github.com/scrapy/scrapy/issues/1267))

Documentation

- CrawlerProcess documentation ([#1190](https://github.com/scrapy/scrapy/issues/1190))
- Favoring web scraping over screen scraping in the descriptions
  ([#1188](https://github.com/scrapy/scrapy/issues/1188))
- Some improvements for Scrapy tutorial ([#1180](https://github.com/scrapy/scrapy/issues/1180))
- Documenting Files Pipeline together with Images Pipeline ([#1150](https://github.com/scrapy/scrapy/issues/1150))
- deployment docs tweaks ([#1164](https://github.com/scrapy/scrapy/issues/1164))
- Added deployment section covering scrapyd-deploy and shub ([#1124](https://github.com/scrapy/scrapy/issues/1124))
- Adding more settings to project template ([#1073](https://github.com/scrapy/scrapy/issues/1073))
- some improvements to overview page ([#1106](https://github.com/scrapy/scrapy/issues/1106))
- Updated link in docs/topics/architecture.rst ([#647](https://github.com/scrapy/scrapy/issues/647))
- DOC reorder topics ([#1022](https://github.com/scrapy/scrapy/issues/1022))
- updating list of Request.meta special keys ([#1071](https://github.com/scrapy/scrapy/issues/1071))
- DOC document download_timeout ([#898](https://github.com/scrapy/scrapy/issues/898))
- DOC simplify extension docs ([#893](https://github.com/scrapy/scrapy/issues/893))
- Leaks docs ([#894](https://github.com/scrapy/scrapy/issues/894))
- DOC document from_crawler method for item pipelines ([#904](https://github.com/scrapy/scrapy/issues/904))
- Spider_error doesn’t support deferreds ([#1292](https://github.com/scrapy/scrapy/issues/1292))
- Corrections & Sphinx related fixes ([#1220](https://github.com/scrapy/scrapy/issues/1220), [#1219](https://github.com/scrapy/scrapy/issues/1219),
  [#1196](https://github.com/scrapy/scrapy/issues/1196), [#1172](https://github.com/scrapy/scrapy/issues/1172), [#1171](https://github.com/scrapy/scrapy/issues/1171), [#1169](https://github.com/scrapy/scrapy/issues/1169), [#1160](https://github.com/scrapy/scrapy/issues/1160),
  [#1154](https://github.com/scrapy/scrapy/issues/1154), [#1127](https://github.com/scrapy/scrapy/issues/1127), [#1112](https://github.com/scrapy/scrapy/issues/1112), [#1105](https://github.com/scrapy/scrapy/issues/1105), [#1041](https://github.com/scrapy/scrapy/issues/1041),
  [#1082](https://github.com/scrapy/scrapy/issues/1082), [#1033](https://github.com/scrapy/scrapy/issues/1033), [#944](https://github.com/scrapy/scrapy/issues/944), [#866](https://github.com/scrapy/scrapy/issues/866), [#864](https://github.com/scrapy/scrapy/issues/864),
  [#796](https://github.com/scrapy/scrapy/issues/796), [#1260](https://github.com/scrapy/scrapy/issues/1260), [#1271](https://github.com/scrapy/scrapy/issues/1271), [#1293](https://github.com/scrapy/scrapy/issues/1293), [#1298](https://github.com/scrapy/scrapy/issues/1298))

Bugfixes

- Item multi inheritance fix ([#353](https://github.com/scrapy/scrapy/issues/353), [#1228](https://github.com/scrapy/scrapy/issues/1228))
- ItemLoader.load_item: iterate over copy of fields ([#722](https://github.com/scrapy/scrapy/issues/722))
- Fix Unhandled error in Deferred (RobotsTxtMiddleware) ([#1131](https://github.com/scrapy/scrapy/issues/1131),
  [#1197](https://github.com/scrapy/scrapy/issues/1197))
- Force to read DOWNLOAD_TIMEOUT as int ([#954](https://github.com/scrapy/scrapy/issues/954))
- scrapy.utils.misc.load_object should print full traceback ([#902](https://github.com/scrapy/scrapy/issues/902))
- Fix bug for “.local” host name ([#878](https://github.com/scrapy/scrapy/issues/878))
- Fix for Enabled extensions, middlewares, pipelines info not printed
  anymore ([#879](https://github.com/scrapy/scrapy/issues/879))
- fix dont_merge_cookies bad behaviour when set to false on meta
  ([#846](https://github.com/scrapy/scrapy/issues/846))

Python 3 In Progress Support

- disable scrapy.telnet if twisted.conch is not available ([#1161](https://github.com/scrapy/scrapy/issues/1161))
- fix Python 3 syntax errors in ajaxcrawl.py ([#1162](https://github.com/scrapy/scrapy/issues/1162))
- more python3 compatibility changes for urllib ([#1121](https://github.com/scrapy/scrapy/issues/1121))
- assertItemsEqual was renamed to assertCountEqual in Python 3.
  ([#1070](https://github.com/scrapy/scrapy/issues/1070))
- Import unittest.mock if available. ([#1066](https://github.com/scrapy/scrapy/issues/1066))
- updated deprecated cgi.parse_qsl to use six’s parse_qsl ([#909](https://github.com/scrapy/scrapy/issues/909))
- Prevent Python 3 port regressions ([#830](https://github.com/scrapy/scrapy/issues/830))
- PY3: use MutableMapping for python 3 ([#810](https://github.com/scrapy/scrapy/issues/810))
- PY3: use six.BytesIO and six.moves.cStringIO ([#803](https://github.com/scrapy/scrapy/issues/803))
- PY3: fix xmlrpclib and email imports ([#801](https://github.com/scrapy/scrapy/issues/801))
- PY3: use six for robotparser and urlparse ([#800](https://github.com/scrapy/scrapy/issues/800))
- PY3: use six.iterkeys, six.iteritems, and tempfile ([#799](https://github.com/scrapy/scrapy/issues/799))
- PY3: fix has_key and use six.moves.configparser ([#798](https://github.com/scrapy/scrapy/issues/798))
- PY3: use six.moves.cPickle ([#797](https://github.com/scrapy/scrapy/issues/797))
- PY3 make it possible to run some tests in Python3 ([#776](https://github.com/scrapy/scrapy/issues/776))

Tests

- remove unnecessary lines from py3-ignores ([#1243](https://github.com/scrapy/scrapy/issues/1243))
- Fix remaining warnings from pytest while collecting tests ([#1206](https://github.com/scrapy/scrapy/issues/1206))
- Add docs build to travis ([#1234](https://github.com/scrapy/scrapy/issues/1234))
- TST don’t collect tests from deprecated modules. ([#1165](https://github.com/scrapy/scrapy/issues/1165))
- install service_identity package in tests to prevent warnings
  ([#1168](https://github.com/scrapy/scrapy/issues/1168))
- Fix deprecated settings API in tests ([#1152](https://github.com/scrapy/scrapy/issues/1152))
- Add test for webclient with POST method and no body given ([#1089](https://github.com/scrapy/scrapy/issues/1089))
- py3-ignores.txt supports comments ([#1044](https://github.com/scrapy/scrapy/issues/1044))
- modernize some of the asserts ([#835](https://github.com/scrapy/scrapy/issues/835))
- selector._\_repr_\_ test ([#779](https://github.com/scrapy/scrapy/issues/779))

Code refactoring

- CSVFeedSpider cleanup: use iterate_spider_output ([#1079](https://github.com/scrapy/scrapy/issues/1079))
- remove unnecessary check from scrapy.utils.spider.iter_spider_output
  ([#1078](https://github.com/scrapy/scrapy/issues/1078))
- Pydispatch pep8 ([#992](https://github.com/scrapy/scrapy/issues/992))
- Removed unused ‘load=False’ parameter from walk_modules() ([#871](https://github.com/scrapy/scrapy/issues/871))
- For consistency, use `job_dir` helper in `SpiderState` extension.
  ([#805](https://github.com/scrapy/scrapy/issues/805))
- rename “sflo” local variables to less cryptic “log_observer” ([#775](https://github.com/scrapy/scrapy/issues/775))