原文链接: tornado处理post请求的json数据

方式一, urllib.parse.urlencode
代码
server

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class MainHandler(RequestHandler):
    def post(self):
        param = self.get_argument('param')
        print(type(param))
        print(param)
        param = eval(param)
        print(type(param))
        print(param)
        self.write('OK')

client

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import urllib.parse
import urllib.request
url = "http://172.16.1.239:8888/"
req_dict = {'param': 'param'}
req_encode = urllib.parse.urlencode(req_dict)
req_post = req_encode.encode('utf-8')
print(req_post)
headers = {}
req = urllib.request.Request(url=url, headers=headers, data=req_post)
res = urllib.request.urlopen(req)
res = res.read().decode('utf-8')

输出
server

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<class 'str'>
{'k': 'v'}
<class 'dict'>
{'k': 'v'}

client

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b'param=%7B%27k%27%3A+%27v%27%7D'
OK

方式二, json
代码
server

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class MainHandler(RequestHandler):
    def post(self):
        param = self.request.body.decode('utf-8')
        prarm = json.loads(param)
        print(param)
        self.write('Ok')

client

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import json
import urllib.parse
import urllib.request
url = "http://172.16.1.239:8888/"
param = {'k': 'v'}
req_dict = {'param': param}
req_json = json.dumps(req_dict)
req_post = req_json.encode('utf-8')
print(req_post)
headers = {'Content-Type': 'application/json'}
req = urllib.request.Request(url=url, headers=headers, data=req_post)
res = urllib.request.urlopen(req)
res = res.read().decode('utf-8')
print(res)

输出
server

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{"param": {"k": "v"}}

client

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b'{"param": {"k": "v"}}'
OK

方式二client请求方式一的server, server会报如下错误
WARNING:tornado.general:400 POST /start_plus (172.16.1.239): Missing argument param

同样

方式一client请求方式二的server, server会报如下错误
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)