具有Scrapy-Splash的代理服务器

Question

我正在尝试让代理服务器在我的本地启动实例上工作。我已经阅读了几份文件，但没有找到任何可行的示例。我注意到，这个 https://github.com/scrapy-plugins/scrapy-splash/issues/107 是原因。我不再得到那个回溯，但仍然无法将 Splash 与代理一起使用。下面的新错误消息。如果有人可以帮助我解决这个问题，请提前感谢。我的所有请求都没有通过 Splash。

  def parse_json(self, response):
    json_data = response.body
    load = json.loads(json_data.decode('utf-8'))
    dump = json.dumps(load,sort_keys=True,indent=2)
    LUA_SOURCE = """
    function main(splash)
        local host = "proxy.crawlera.com"
        local port = 8010
        local user = "APIKEY"
        local password = ""
        local session_header = "X-Crawlera-Session"
        local session_id = "create"
        splash:on_request(function (request)
            request:set_header("X-Crawlera-UA", "desktop")
            request:set_header(session_header, session_id)
            request:set_proxy{host, port, username=user, password=password}
        end)
        splash:on_response_headers(function (response)
            if response.headers[session_header] ~= nil then
                session_id = response.headers[session_header]
            end
        end)
        splash:go(splash.args.url)
        return splash:html()
    end
    """
    for link in load['d']['blogtopics']:
        link = link['Uri']
        yield SplashRequest(link, self.parse_blog, endpoint='execute',  args={'wait': 3, 'lua_source': LUA_SOURCE})

2017-03-29 09:26:37 [scrapy.core.engine] DEBUG: Crawled (503) <GET http://community.martindale.com/legal-blogs/Practice_Areas/b/corporate__securities_law/archive/2011/08/11/sec-adopts-new-rules-replacing-credit-ratings-as-a-criterion-for-the-use-of-short-form-shelf-registration.aspx via http://localhost:8050/execute> (referer: None)

Answer 1

问题似乎是由 Crawlera 中间件引起的。没有处理 SplashRequest。它尝试通过代理到我的本地主机。