Question

我试图通过使用t.p.basic.LineReceiver获取HTTP POST请求正文但是失败了。我的代码如下：

from twisted.internet import reactor, protocol
from twisted.protocols import basic

class PrintPostBody(basic.LineReceiver):
    def __init__(self):
        self.line_no = 0

    def lineReceived(self, line):
        print '{0}: {1}'.format(str(self.line_no).rjust(3), repr(line))
        self.line_no += 1

    def connectionLost(self, reason):
        print "conn lost"

class PPBFactory(protocol.ServerFactory):
    protocol = PrintPostBody

def main():
    f = PPBFactory()
    reactor.listenTCP(80, f)
    reactor.run()


if __name__ == '__main__':
    main()

但是当我在端口80对该计算机发出HTTP POST请求时，只打印出HTTP请求标头。样本输出：

  0: 'POST / HTTP/1.0'
  1: 'Host: ###.##.##.##'
  2: 'Referer: http://#.#####.###/?ssid=0&from=0&bd_page_type=1&uid=wiaui_1292470548_2644&pu=sz%40176_229,sz%40176_208'
  3: 'Content-Length: 116'
  4: 'Origin: http://#.#####.###'
  5: 'Content-Type: application/x-www-form-urlencoded'
  6: 'Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5'
  7: 'User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US) AppleWebKit/534.11 (KHTML, like Gecko) Chrome/9.0.565.0 Safari/534.11'
  8: 'Accept-Encoding: gzip,deflate,sdch'
  9: 'Accept-Language: en-US,en;q=0.8'
 10: 'Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3'
 11: 'Via: 1.1 #####.###.###.##:8080 (squid/2.6.STABLE21)'
 12: 'X-Forwarded-For: ###.##.###.###'
 13: 'Cache-Control: max-age=0'
 14: 'Connection: keep-alive'
 15: ''

所以这里没有关闭连接，但也没有收到POST主体。

我已经通过运行sudo nc -l 80测试了网络状况，并且确实打印出了HTTP POST请求正文。

那么，我如何使用Twisted获取HTTP POST请求正文？非常感谢你。

Answer 1

我怀疑您没有看到请求正文打印出来，因为它不包含任何换行符或以换行符结尾。因此它进入了PrintPostBody实例的解析缓冲区并永远坐在那里，等待换行符表示已收到完整的行。在收到整行之前，LineReceiver不会调用lineReceived回调。

相反，你可以让Twisted Web为你做这个解析：

from twisted.web.server import Site  # Site is a server factory for HTTP
from twisted.web.resource import Resource
from twisted.internet import reactor

class PrintPostBody(Resource):  # Resources are what Site knows how to deal with
    isLeaf = True  # Disable child lookup

    def render_POST(self, request):  # Define a handler for POST requests
        print request.content.read()  # Get the request body from this file-like object
        return "" # Define the response body as empty

reactor.listenTCP(80, Site(PrintPostBody()))
reactor.run()

无法使用Twisted获取HTTP POST请求正文

1 个答案: