Python Scrapy 301 重定向 [英] Python Scrapy 301 redirects

问题描述

在抓取给定网站时，我在打印重定向的 url(301 重定向后的新 URL)时遇到了一些问题.我的想法是只打印它们而不是刮它们.我目前的一段代码是:

I have a little problem in printing the redirected urls (new URLs after 301 redirection) when scraping a given website. My idea is to only print them and not scrape them. My current piece of code is:

import scrapy
import os
from scrapy.spiders import CrawlSpider, Rule
from scrapy.linkextractors import LinkExtractor

class MySpider(CrawlSpider):
    name = 'rust'
    allowed_domains = ['example.com']
    start_urls = ['http://example.com']

    rules = (
        # Extract links matching 'category.php' (but not matching 'subsection.php')
        # and follow links from them (since no callback means follow=True by default).
        # Extract links matching 'item.php' and parse them with the spider's method parse_item
        Rule(LinkExtractor(), callback='parse_item', follow=True),
    )

    def parse_item(self, response):
        #if response.status == 301:
        print response.url

但是，这不会打印重定向的 url.任何帮助将不胜感激.

However, this does not print the redirected urls. Any help will be appreciated.

谢谢.

推荐答案

要解析不是 200 的任何响应，您需要执行以下操作之一:

To parse any responses that are not 200 you'd need to do one of these things:

您可以在 settings.py 文件中设置设置 HTTPERROR_ALLOWED_CODES = [301,302,...].或者，如果您想为所有代码启用它，您可以改为设置 HTTPERROR_ALLOW_ALL = True.

You can set setting HTTPERROR_ALLOWED_CODES = [301,302,...] in settings.py file. Or if you want to enable it for all codes you can set HTTPERROR_ALLOW_ALL = True instead.

将 handle_httpstatus_list 参数添加到您的蜘蛛.在你的情况下是这样的:

Add handle_httpstatus_list parameter to your spider. In your case something like:

class MySpider(scrapy.Spider):
    handle_httpstatus_list = [301]
    # or 
    handle_httpstatus_all = True

请求范围

您可以在请求中设置这些 meta 键 handle_httpstatus_list = [301, 302,...] 或 handle_httpstatus_all = True:

scrapy.request('http://url.com', meta={'handle_httpstatus_list': [301]})

要了解更多信息，请参阅 HttpErrorMiddleware

To learn more see HttpErrorMiddleware

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