Web crawling framework based on asyncio.
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yc0 and gaojiuli Queue timeout and python 3.6 support. (#40)
* support sessions mechanism, which brings cookie_jar to subsquent ClientSession.
Also, adopt "async with" for aiohttp instead.

* add timeout mechanism to avoid blocking by queue.get() coroutine.
Latest commit 2c8160c Mar 19, 2018

README.md

Build Python Version License

Web crawling framework for everyone. Written with asyncio, uvloop and aiohttp.

Requirements

  • Python3.5+

Installation

pip install gain

pip install uvloop (Only linux)

Usage

  1. Write spider.py:
from gain import Css, Item, Parser, Spider
import aiofiles

class Post(Item):
    title = Css('.entry-title')
    content = Css('.entry-content')

    async def save(self):
        async with aiofiles.open('scrapinghub.txt', 'a+') as f:
            await f.write(self.results['title'])


class MySpider(Spider):
    concurrency = 5
    headers = {'User-Agent': 'Google Spider'}
    start_url = 'https://blog.scrapinghub.com/'
    parsers = [Parser('https://blog.scrapinghub.com/page/\d+/'),
               Parser('https://blog.scrapinghub.com/\d{4}/\d{2}/\d{2}/[a-z0-9\-]+/', Post)]


MySpider.run()

Or use XPathParser:

from gain import Css, Item, Parser, XPathParser, Spider


class Post(Item):
    title = Css('.breadcrumb_last')

    async def save(self):
        print(self.title)


class MySpider(Spider):
    start_url = 'https://mydramatime.com/europe-and-us-drama/'
    concurrency = 5
    headers = {'User-Agent': 'Google Spider'}
    parsers = [
               XPathParser('//span[@class="category-name"]/a/@href'),
               XPathParser('//div[contains(@class, "pagination")]/ul/li/a[contains(@href, "page")]/@href'),
               XPathParser('//div[@class="mini-left"]//div[contains(@class, "mini-title")]/a/@href', Post)
              ]
    proxy = 'https://localhost:1234'

MySpider.run()

You can add proxy setting to spider as above.

  1. Run python spider.py

  2. Result:

Example

The examples are in the /example/ directory.

Contribution

  • Pull request.
  • Open issue.