python - 通过 HTTP 发送和接收简单的 JSON 消息

Question

我想通过 HTTP 发送和接收一些简单的数据。

这是服务器端:

import time
import BaseHTTPServer
import json

HOST_NAME = 'localhost' 
PORT_NUMBER = 9000 

class MyHandler(BaseHTTPServer.BaseHTTPRequestHandler):
    def do_POST(self):
        print "You've got mail!"
        content_len = int(self.headers.getheader('content-length', 0))
        body = self.rfile.read(content_len)
        data = json.loads(body)
        print data

if __name__ == '__main__':
    server_class = BaseHTTPServer.HTTPServer
    httpd = server_class((HOST_NAME, PORT_NUMBER), MyHandler)
    print time.asctime(), "Server Starts - %s:%s" % (HOST_NAME, 
PORT_NUMBER)
    try:
        httpd.serve_forever()
    except KeyboardInterrupt:
        pass
    httpd.server_close()
    print time.asctime(), "Server Stops - %s:%s" % (HOST_NAME, PORT_NUMBER)

这是客户端:

import requests
import json

url = 'http://localhost:9000'
data = {
    'date': 'the best day',
    'time': 'the best time',
    'name': 'Janet Smith'
}

r = requests.post(url, json=data)
print r.status_code
print r.json() 

我收到这个错误:

Traceback (most recent call last): File "testSend.py", line 17, in

r = requests.post(url, json=data)

File "/Library/Python/2.7/site-packages/requests/api.py", line 116, in post return request('post', url, data=data, json=json, **kwargs)

File "/Library/Python/2.7/site-packages/requests/api.py", line 60, in request

return session.request(method=method, url=url, **kwargs)

File "/Library/Python/2.7/site-packages/requests/sessions.py", line 524, in request

resp = self.send(prep, **send_kwargs)

File "/Library/Python/2.7/site-packages/requests/sessions.py", line 637, in send

r = adapter.send(request, **kwargs)

File "/Library/Python/2.7/site-packages/requests/adapters.py", line 498, in send

raise ConnectionError(err, request=request)

requests.exceptions.ConnectionError: ('Connection aborted.',

BadStatusLine("''",))

编辑:我最初也遇到了服务器端错误，但看起来问题可能出在一行粘贴的代码上。我重新缩进了所有内容，现在可以使用了。

Answer 1

原来有几个问题:

1. 服务器端错误是由于复制粘贴代码造成的。我需要重新缩进所有内容。

2. 通过在服务器端将 self.send_response(200) 添加到我的 DO_POST 函数来修复客户端错误

3. 执行 #2 会引入一个新的“无法解码 json”错误。这是因为来自服务器的响应不包含 json 消息。所以我只需要注释掉 print r.json() 行或在服务器端发送一条 json 消息。