Screen scraping and web crawling framework

Related tags

Web Crawling python crawler framework scraping crawling asyncio
Overview

Pomp

circleci codecov Latest PyPI version python versions Have wheel License

Pomp is a screen scraping and web crawling framework. Pomp is inspired by and similar to Scrapy, but has a simpler implementation that lacks the hard Twisted dependency.

Features:

  • Pure python
  • Only one dependency for Python 2.x - concurrent.futures (backport of package for Python 2.x)
  • Supports one file applications; Pomps doesn't force a specific project layout or other restrictions.
  • Pomp is a meta framework like Paste: you may use it to create your own scraping framework.
  • Extensible networking: you may use any sync or async method.
  • No parsing libraries in the core; use you preferred approach.
  • Pomp instances may be distributed and are designed to work with an external queue.

Pomp makes no attempt to accomodate:

  • redirects
  • proxies
  • caching
  • database integration
  • cookies
  • authentication
  • etc.

If you want proxies, redirects, or similar, you may use the excellent requests library as the Pomp downloader.

Pomp examples

Pomp docs

Pomp is written and maintained by Evgeniy Tatarkin and is licensed under the BSD license.

Comments
  • Comprehensive examples

    Comprehensive examples

    Pomp looks like a nice and simple design - I'm going to give it a try while migrating an existing Scrapy project to Python 3.

    However, I would really like to see some more comprehensive examples in the documentation or the repository.

    For instance, a larger project would:

    • Use requests middleware for auth, proxies, etc
    • Use asyncio with some kind of queue
    • Export to a database
    • Run as a daemon or a scheduled job

    These things can be rolled together by any competent Python dev, but I think demonstrating one or more ways to build a full-scale production deployment might help gain a few users.

    opened by danielnaab 6
  • Improve item

    Improve item

    Now we can use the following syntax

    class MyItem(Item): f1 = Field() f2 = Field()

    mi = MyItem('field1', 'field2') mi.f1 == 'field1' m.f2 == 'field2' print(m) == 'MyItem(f1=field1,f2=field2)'

    opened by sibelius 2
  • Documentation changes for readability.

    Documentation changes for readability.

    I started a search for a Python 3 compatible crawler and came across Pomp. While I haven't tried the framework out yet, I thought I'd contribute some clarifications to the docstrings and README to improve the readability for native English speakers.

    opened by danielnaab 1
  • RetryMiddleware(BaseMiddleware)

    RetryMiddleware(BaseMiddleware)

    How i can retry request in middleware process_exception? Example

    class RetryMiddleware(BaseMiddleware):

   def process_exception(self, exception, crawler, downloader):
        logger.info("Try again with request: %s", exception.request)
        return exception.request
    opened by affmaker 1
  • 'PhantomDownloader' object has no attribute 'drivers'

    'PhantomDownloader' object has no attribute 'drivers'

    Just trying to launch e05_phantomjs.py example.

    INFO:pomp.engine:Prepare downloader: <__main__.PhantomDownloader object at 0x10e0be3c8> INFO:pomp.engine:Start crawler: <__main__.TwitterSpider object at 0x10e78c128> INFO:pomp.engine:Start pipe: <e02_quotes.PrintPipeline object at 0x10e77ff60> Traceback (most recent call last): File "e05_phantomjs.py", line 200, in <module> pomp.pump(TwitterSpider()) File "/usr/local/lib/python3.6/site-packages/pomp/core/engine.py", line 271, in pump iterator(next_requests), crawler, File "/usr/local/lib/python3.6/site-packages/pomp/core/engine.py", line 158, in process_requests self._req_middlewares(requests, crawler), crawler): File "e05_phantomjs.py", line 109, in process request.driver_url = self.drivers[0].command_executor._url AttributeError: 'PhantomDownloader' object has no attribute 'drivers'

    opened by karambaq 2
Owner
Evgeniy Tatarkin
Evgeniy Tatarkin
GitHub https://pomp.readthedocs.org
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