awinograd/scrapy-inline-requests

Scrapy Inline Requests

This module provides a decorator to allow to write Scrapy's spider callbacks which performs multiple requests without the need to write multiple callbacks for each request.

The code is experimental, might not work in all cases and even might be hard to debug.

Example:

from inline_requests import inline_requests

class MySpider(CrawlSpider):

  ...

  @inline_requests
  def parse_item(self, response):
    item = self.build_item(response)

    # scrape more information
    response = yield Request(response.url + '?info')
    item['info'] = self.extract_info(response)

    # scrape pictures
    response = yield Request(response.url + '?pictures')
    item['pictures'] = self.extract_pictures(response)

    # a request that might fail (dns error, network timeout, error 404/500, etc)
    try:
      response = yield Request(response.url + '?protected')
    except Exception as e:
      log.err(e, spider=self)
    else:
      item['protected'] = self.extract_protected_info(response)

    # finally yield the item
    yield item

Example Project

The example directory includes a example spider for StackOverflow.com:

cd example
scrapy crawl stackoverflow

Requirements

• Python 2.6+
• Scrapy 0.14+