不完全确定问题出在哪里。
运行 Python 2.7.3 和 Scrapy 0.16.5
我创建了一个非常简单的 Scrapy spider 来测试连接到我的本地 Polipo 代理，这样我就可以通过 TOR 发送请求。我的蜘蛛的基本代码如下：
from scrapy.spider import BaseSpider
class TorSpider(BaseSpider):
name = "tor"
allowed_domains = ["check.torproject.org"]
start_urls = [
"https://check.torproject.org"
]
def parse(self, response):
print response.body
对于我的代理中间件，我定义了：
class ProxyMiddleware(object):
def process_request(self, request, spider):
request.meta['proxy'] = settings.get('HTTP_PROXY')
我的设置文件中的 HTTP_PROXY 定义为HTTP_PROXY = 'http://localhost:8123'.
现在，如果我将起始 URL 更改为http://check.torproject.org，一切正常，没有问题。
如果我尝试针对https://check.torproject.org运行，我每次都会收到 400 Bad Request 错误（我也尝试过不同的 https:// 站点，它们都有相同的问题）：
2013-07-23 21:36:18+0100 [scrapy] INFO: Scrapy 0.16.5 started (bot: arachnid)
2013-07-23 21:36:18+0100 [scrapy] DEBUG: Enabled extensions: LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, SpiderState
2013-07-23 21:36:18+0100 [scrapy] DEBUG: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, RandomUserAgentMiddleware, ProxyMiddleware, RetryMiddleware, DefaultHeadersMiddleware, RedirectMiddleware, CookiesMiddleware, HttpCompressionMiddleware, ChunkedTransferMiddleware, DownloaderStats
2013-07-23 21:36:18+0100 [scrapy] DEBUG: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
2013-07-23 21:36:18+0100 [scrapy] DEBUG: Enabled item pipelines:
2013-07-23 21:36:18+0100 [tor] INFO: Spider opened
2013-07-23 21:36:18+0100 [tor] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2013-07-23 21:36:18+0100 [scrapy] DEBUG: Telnet console listening on 0.0.0.0:6023
2013-07-23 21:36:18+0100 [scrapy] DEBUG: Web service listening on 0.0.0.0:6080
2013-07-23 21:36:18+0100 [tor] DEBUG: Retrying <GET https://check.torproject.org> (failed 1 times): 400 Bad Request
2013-07-23 21:36:18+0100 [tor] DEBUG: Retrying <GET https://check.torproject.org> (failed 2 times): 400 Bad Request
2013-07-23 21:36:18+0100 [tor] DEBUG: Gave up retrying <GET https://check.torproject.org> (failed 3 times): 400 Bad Request
2013-07-23 21:36:18+0100 [tor] DEBUG: Crawled (400) <GET https://check.torproject.org> (referer: None)
2013-07-23 21:36:18+0100 [tor] INFO: Closing spider (finished)
为了仔细检查我的 TOR/Polipo 设置是否有问题，我可以在终端中运行以下 curl 命令，并正常连接：curl --proxy localhost:8123 https://check.torproject.org/
关于这里有什么问题的任何建议？