Python3：没有请求库的 JSON POST 请求
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Python3: JSON POST Request WITHOUT requests library
提问by moritzg
I want to send JSON encoded data to a server using only native Python libraries. I love requests but I simply can't use it because I can't use it on the machine which runs the script. I need to do it without.
我想仅使用本机 Python 库将 JSON 编码的数据发送到服务器。我喜欢请求，但我根本无法使用它，因为我无法在运行脚本的机器上使用它。我需要在没有的情况下做到这一点。
newConditions = {"con1":40, "con2":20, "con3":99, "con4":40, "password":"1234"}
params = urllib.parse.urlencode(newConditions)
params = params.encode('utf-8')
req = urllib.request.Request(conditionsSetURL, data=params)
urllib.request.urlopen(req)
My server is a local WAMP server. I always get an
我的服务器是本地 WAMP 服务器。我总是得到一个
urllib.error.HTTPError: HTTP Error 500: Internal Server Error
urllib.error.HTTPError：HTTP 错误 500：内部服务器错误
I am 100% surethat this is NOTa server issue, because the same data, with the same url, on the same machine, with the same server works with the requests library and Postman.
我100% 确定这不是服务器问题，因为相同的数据，具有相同的 url，在同一台机器上，具有相同的服务器与请求库和邮递员一起工作。
采纳答案by Martijn Pieters
You are not posting JSON, you are posting a application/x-www-form-urlencodedrequest.
您不是在发布 JSON，而是在发布application/x-www-form-urlencoded请求。
Encode to JSON and set the right headers:
编码为 JSON 并设置正确的标头：
import json
newConditions = {"con1":40, "con2":20, "con3":99, "con4":40, "password":"1234"}
params = json.dumps(newConditions).encode('utf8')
req = urllib.request.Request(conditionsSetURL, data=params,
headers={'content-type': 'application/json'})
response = urllib.request.urlopen(req)
Demo:
演示：
>>> import json
>>> import urllib.request
>>> conditionsSetURL = 'http://httpbin.org/post'
>>> newConditions = {"con1":40, "con2":20, "con3":99, "con4":40, "password":"1234"}
>>> params = json.dumps(newConditions).encode('utf8')
>>> req = urllib.request.Request(conditionsSetURL, data=params,
... headers={'content-type': 'application/json'})
>>> response = urllib.request.urlopen(req)
>>> print(response.read().decode('utf8'))
{
"args": {},
"data": "{\"con4\": 40, \"con2\": 20, \"con1\": 40, \"password\": \"1234\", \"con3\": 99}",
"files": {},
"form": {},
"headers": {
"Accept-Encoding": "identity",
"Connection": "close",
"Content-Length": "68",
"Content-Type": "application/json",
"Host": "httpbin.org",
"User-Agent": "Python-urllib/3.4",
"X-Request-Id": "411fbb7c-1aa0-457e-95f9-1af15b77c2d8"
},
"json": {
"con1": 40,
"con2": 20,
"con3": 99,
"con4": 40,
"password": "1234"
},
"origin": "84.92.98.170",
"url": "http://httpbin.org/post"
}
