GRequests: Asynchronous Requests

GRequests allows you to use Requests with Gevent to make asynchronous HTTP Requests easily.

Note: You should probably use requests-threads or requests-futures instead.

Usage

Usage is simple:

import grequests

urls = [
    'http://www.heroku.com',
    'http://python-tablib.org',
    'http://httpbin.org',
    'http://python-requests.org',
    'http://fakedomain/',
    'http://kennethreitz.com'
]

Create a set of unsent Requests:

>>> rs = (grequests.get(u) for u in urls)

Send them all at the same time:

>>> grequests.map(rs)
[<Response [200]>, <Response [200]>, <Response [200]>, <Response [200]>, None, <Response [200]>]

Optionally, in the event of a timeout or any other exception during the connection of the request, you can add an exception handler that will be called with the request and exception inside the main thread:

>>> def exception_handler(request, exception):
...    print("Request failed")

>>> reqs = [
...    grequests.get('http://httpbin.org/delay/1', timeout=0.001),
...    grequests.get('http://fakedomain/'),
...    grequests.get('http://httpbin.org/status/500')]
>>> grequests.map(reqs, exception_handler=exception_handler)
Request failed
Request failed
[None, None, <Response [500]>]

For some speed/performance gains, you may also want to use imap instead of map. imap returns a generator of responses. Order of these responses does not map to the order of the requests you send out. The API for imap is equivalent to the API for map.

To pass parameters in request, you can pass them in params dict just as in requests.get:

>>> reqs = [
...    grequests.get('some-url', params={'param1': 'value1'}),
...    grequests.get('some-other-url', params={'param2': 'value2'})]
>>> grequests.map(reqs)

Installation

Installation is easy with pip:

$ pip install grequests
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