HTTPResponse.read([amt])：只能read一次

业务需要：我要写个tanx模拟器，给DSP发竞价请求。

下面是部分代码：

  def PostDataToDSP(self,url,postdata):
         headers = {
              'Content-Type':'application/octet-stream',
              'Connection':'Keep-Alive',
         }

         payload = postdata.SerializeToString()

         conn = httplib.HTTPConnection(url)
         conn.request(method='POST',url='/bid',body = payload, headers = headers)
         response = conn.getresponse()

         print response.status

         if 200 == response.status:
             print response.read()
             print 'send successfully'
         else:
             print 'send failed'

         conn.close()
         return response.read()

这个代码是错误的，刚接触互联网行业，一堆不懂。

老大指点说：只能read一次。

代码修改后：

  def PostDataToDSP(self,url,postdata):
         headers = {
              'Content-Type':'application/octet-stream',
              'Connection':'Keep-Alive',
         }

         payload = postdata.SerializeToString()

         conn = httplib.HTTPConnection(url)
         conn.request(method='POST',url='/bid',body = payload, headers = headers)
         response = conn.getresponse()

         print response.status

         if 200 == response.status:
             res = response.read()
             print 'send successfully'
         else:
             print 'send failed'

         conn.close()
         return res