请求时出现 flask错误.Post on micropython esp8266

Question

我只是用flask制作api，并且有错误请求。微python esp8266这是我的代码

flask.py

from flask import Flask, request
import os, sys
cert = os.path.join(sys.path[0], 'cert.pem')
key = os.path.join(sys.path[0], 'key.pem')
app = Flask(__name__)
context = (cert, key)
@app.route("/")
def hello():
return {'data': 'demo'}
@app.route('/demo', methods = ['POST'])
def demo_post():
content = request.get_json()
print(content)
return content
if __name__ == "__main__":
app.run(host='0.0.0.0', port='5000', debug = True, ssl_context = context)
#app.run(port='5000', debug = True)

normal_requests(工作). py

import requests
requests.get('https://example.com/').json()
>>> {'data': 'demo'}
requests.post('https://example.com/demo', json={"a":5,"b":4}).json()
>>> {"a":5,"b":4}

micropython_urequests(工作). py

import urequests
urequests.get('https://example.com/').json()
>>> {'data': 'demo'}

---

error this line

urequests.post('https://example.com/demo', json={"a":5,"b":4}).json()

误差

Traceback (most recent call last):
File "/home/pi/programing/myenv/flask/lib/python3.7/site-packages/flask/app.py", line 2464, in __call__
return self.wsgi_app(environ, start_response)
File "/home/pi/programing/myenv/flask/lib/python3.7/site-packages/flask/app.py", line 2450, in wsgi_app
response = self.handle_exception(e)
File "/home/pi/programing/myenv/flask/lib/python3.7/site-packages/flask/app.py", line 1867, in handle_exception
reraise(exc_type, exc_value, tb)
File "/home/pi/programing/myenv/flask/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
raise value
File "/home/pi/programing/myenv/flask/lib/python3.7/site-packages/flask/app.py", line 2447, in wsgi_app
response = self.full_dispatch_request()
File "/home/pi/programing/myenv/flask/lib/python3.7/site-packages/flask/app.py", line 1953, in full_dispatch_request
return self.finalize_request(rv)
File "/home/pi/programing/myenv/flask/lib/python3.7/site-packages/flask/app.py", line 1968, in finalize_request
response = self.make_response(rv)
File "/home/pi/programing/myenv/flask/lib/python3.7/site-packages/flask/app.py", line 2098, in make_response
"The view function did not return a valid response. The"
TypeError: The view function did not return a valid response. The function either returned None or ended without a return statement.

请帮忙，谢谢!

Answer 1

请查看请求中的帖子示例

使用ujson.dumps返回以JSON字符串表示的dict。

import urequests
import ujson
post_data = ujson.dumps({"a":5,"b":4})
res = urequests.post('https://example.com/demo', headers = {'content-type': 'application/json'}, data = post_data).json()