在Werkzeug中发送HTTP PUT请求

Question

在我的网页应用中，我使用werkzeug来监听和处理请求。在某个功能中，我需要监听来自A的请求，然后向另一个服务器B发送一个http的put请求，等我从B那里收到响应后，再把这个响应返回给A。

我对werkzeug不是很熟悉，不确定它是否有发送请求的功能，所以我用了httplib来发送请求。

但是我遇到了错误。

这里有很多环节，我想知道以下几点：

1. werkzeug是否有发送请求的能力？
2. 错误的原因是什么？

感谢任何帮助。

代码：

def complete(self, request):
    if request.method == 'GET':
        location_id = self.extract_param_value(request,'location_id');
        status_code = self.extract_param_value(request,'status_code');

        req_url = something;
        jsonData = { 'data' : {'status' : status_code, 'id': location_id}};
        jsonDataDump = json.dumps(jsonData);
        #send request to B
        connection =  httplib.HTTPConnection(HOST, timeout=5);
        body_content = jsonDataDump;
        headers = {"Content-type": "application/json", "Accept": "text/plain"};
        connection.request('PUT', req_url, body_content, headers); #error occurs here
        result = connection.getresponse();
        connection.close();
        #return response to A
        response = Response(status=200);

        return response;

错误：

        1**.1**.1**.** - - [30/Dec/2011 03:06:57] "GET //complete?location_id=615201308&status_code=LIVE&message=fine HTTP/1.1" 500 -
        Traceback (most recent call last):
        File "/home/ec2-user/y_ws.py", line 381, in __call__
        return self.wsgi_app(environ, start_response)
        File "/usr/lib/python2.6/site-packages/Werkzeug-0.8.1-py2.6.egg/werkzeug/wsgi.py", line 411, in __call__
            return self.app(environ, start_response)
          File "/home/ec2-user/y_ws.py", line 377, in wsgi_app
            response = self.dispatch_request(request);
          File "/home/ec2-user/y_ws.py", line 98, in dispatch_request
            return getattr(self, endpoint)(request, **values)
          File "/home/ec2-user/y_ws.py", line 184, in complete
           connection.request('PUT', y_req_url, body_content, headers);
          File "/usr/lib64/python2.6/httplib.py", line 914, in request
            self._send_request(method, url, body, headers)
          File "/usr/lib64/python2.6/httplib.py", line 951, in _send_request
            self.endheaders()
          File "/usr/lib64/python2.6/httplib.py", line 908, in endheaders
            self._send_output()
          File "/usr/lib64/python2.6/httplib.py", line 780, in _send_output
            self.send(msg)
          File "/usr/lib64/python2.6/httplib.py", line 739, in send
            self.connect()
          File "/usr/lib64/python2.6/httplib.py", line 720, in connect
            self.timeout)
          File "/usr/lib64/python2.6/socket.py", line 567, in create_connection
            raise error, msg
        error: [Errno 111] Connection refused

Answer 1

1. Werkzeug 不是用来发送 HTTP 请求的库，你应该使用 httplib（就像你例子里那样）。
2. 用 curl 检查一下从主机机器发出的请求是否成功，这样可以排除网络问题。你遇到的错误是一个通用的网络错误。