scrapy-fake-useragent

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scrapy-fake-useragent

Random User-Agent middleware for Scrapy scraping framework based on fake-useragent <https://pypi.python.org/pypi/fake-useragent>, which picks up User-Agent strings based on usage statistics <http://www.w3schools.com/browsers/browsers_stats.asp> from a real world database <http://useragentstring.com/>, but also has the option to configure a generator of fake UA strings, as a backup, powered by Faker <https://faker.readthedocs.io/en/stable/providers/faker.providers.user_agent.html>.

It also has the possibility of extending the capabilities of the middleware, by adding your own providers.

Changes

Please see CHANGELOG_.

Installation

The simplest way is to install it via pip:

pip install scrapy-fake-useragent

Configuration

Turn off the built-in UserAgentMiddleware and RetryMiddleware and add RandomUserAgentMiddleware and RetryUserAgentMiddleware.

In Scrapy >=1.0:

.. code:: python

DOWNLOADER_MIDDLEWARES = {
    'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware': None,
    'scrapy.downloadermiddlewares.retry.RetryMiddleware': None,
    'scrapy_fake_useragent.middleware.RandomUserAgentMiddleware': 400,
    'scrapy_fake_useragent.middleware.RetryUserAgentMiddleware': 401,
}

In Scrapy <1.0:

.. code:: python

DOWNLOADER_MIDDLEWARES = {
    'scrapy.contrib.downloadermiddleware.useragent.UserAgentMiddleware': None,
    'scrapy.contrib.downloadermiddleware.retry.RetryMiddleware': None,
    'scrapy_fake_useragent.middleware.RandomUserAgentMiddleware': 400,
    'scrapy_fake_useragent.middleware.RetryUserAgentMiddleware': 401,
}

Recommended setting (1.3.0+):

.. code:: python

FAKEUSERAGENT_PROVIDERS = [
    'scrapy_fake_useragent.providers.FakeUserAgentProvider',  # this is the first provider we'll try
    'scrapy_fake_useragent.providers.FakerProvider',  # if FakeUserAgentProvider fails, we'll use faker to generate a user-agent string for us
    'scrapy_fake_useragent.providers.FixedUserAgentProvider',  # fall back to USER_AGENT value
]
USER_AGENT = '<your user agent string which you will fall back to if all other providers fail>'

---

Additional configuration information

Enabling providers

The package comes with a thin abstraction layer of User-Agent providers, which for purposes of backwards compatibility defaults to:

.. code:: python

FAKEUSERAGENT_PROVIDERS = [
    'scrapy_fake_useragent.providers.FakeUserAgentProvider'
]

The package has also FakerProvider (powered by Faker library <https://faker.readthedocs.io/>__) and FixedUserAgentProvider implemented and available for use if needed.

Each provider is enabled individually, and used in the order they are defined. In case a provider fails execute (for instance, it can happen <https://github.com/hellysmile/fake-useragent/issues/99>__ to fake-useragent because of it's dependency with an online service), the next one will be used.

Example of what FAKEUSERAGENT_PROVIDERS setting may look like in your case:

.. code:: python

FAKEUSERAGENT_PROVIDERS = [
    'scrapy_fake_useragent.providers.FakeUserAgentProvider',
    'scrapy_fake_useragent.providers.FakerProvider',
    'scrapy_fake_useragent.providers.FixedUserAgentProvider',
    'mypackage.providers.CustomProvider'
]

Configuring fake-useragent

Parameter: FAKE_USERAGENT_RANDOM_UA_TYPE defaulting to random.

Other options, as example:

• firefox to mimic only firefox browsers
• desktop or mobile values to send desktop or mobile strings respectively.

You can also set the FAKEUSERAGENT_FALLBACK option, which is a fake-useragent specific fallback. For example:

.. code:: python

FAKEUSERAGENT_FALLBACK = 'Mozilla/5.0 (Android; Mobile; rv:40.0)'

What it does is, if the selected FAKE_USERAGENT_RANDOM_UA_TYPE fails to retrieve a UA, it will use the type set in FAKEUSERAGENT_FALLBACK.

Configuring faker

Parameter: FAKER_RANDOM_UA_TYPE defaulting to user_agent which is the way of selecting totally random User-Agents values. Other options, as example:

• chrome
• firefox

Configuring FixedUserAgent

It also comes with a fixed provider (only provides one user agent), reusing the Scrapy's default USER_AGENT setting value.

Usage with scrapy-proxies

To use with middlewares of random proxy such as scrapy-proxies <https://github.com/aivarsk/scrapy-proxies>_, you need:

1. set RANDOM_UA_PER_PROXY to True to allow switch per proxy

2. set priority of RandomUserAgentMiddleware to be greater than scrapy-proxies, so that proxy is set before handle UA

License

The package is under MIT license. Please see LICENSE_.

.. |GitHub version| image:: https://badge.fury.io/gh/alecxe%2Fscrapy-fake-useragent.svg :target: http://badge.fury.io/gh/alecxe%2Fscrapy-fake-useragent .. |Requirements Status| image:: https://requires.io/github/alecxe/scrapy-fake-useragent/requirements.svg?branch=master :target: https://requires.io/github/alecxe/scrapy-fake-useragent/requirements/?branch=master .. _LICENSE: https://github.com/alecxe/scrapy-fake-useragent/blob/master/LICENSE.txt .. _CHANGELOG: https://github.com/alecxe/scrapy-fake-useragent/blob/master/CHANGELOG.rst