package 数据并将其作为表单数据发送到 flask 服务器应用程序

Question

我正在尝试使用 python random package 组成一些数据，并使用requests package 将其作为表单数据发送。 出于测试目的，我将其发送到httpbin.org以查看响应。

传感器.py

import time, requests
import pandas as pd
from datetime import date, datetime
import random, json


def json_serial(obj):
    """JSON serializer for objects not serializable by default json code"""

    if isinstance(obj, (datetime, date)):
        return obj.isoformat()
    raise TypeError ("Type %s not serializable" % type(obj))


stuff = {}
stamp = json_serial(datetime.now())
elctricMeterReading = (random.random() * 440) - 15

stuff['Date'] = stamp
stuff['MeterReading'] = elctricMeterReading


print(stuff)
r = requests.post('https://httpbin.org/post', data=stuff)
#r = requests.post('http://localhost:5000/datainform', params=stuff)


print("Status code: ", r.status_code)
print("Printing Entire Post Request")
print(r.json())

在 httpbin 的以下响应中，我可以看到'form': {'Date': '2020-06-18T11:42:31.408767', 'MeterReading': '179.49598690916307'}那么我该如何在Flask 应用程序？

httpbin.org 回复：

Status code:  200
Printing Entire Post Request
{'args': {}, 'data': '', 'files': {}, 'form': {'Date': '2020-06-18T11:42:31.408767', 'MeterReading': '179.49598690916307'}, 'headers': {'Accept': '*/*', 'Accept-Encoding': 'gzip, deflate', 'Content-Length': '67', 'Content-Type': 'application/x-www-form-urlencoded', 'Host': 'httpbin.org', 'User-Agent': 'python-requests/2.21.0', 'X-Amzn-Trace-Id': 'Root=1-5eeb9977-4144b1b998be98a1a47d6934', 'X-B3-Parentspanid': 'a327575ce788b35a', 'X-B3-Sampled': '0', 'X-B3-Spanid': '097957453d58e94e', 'X-B3-Traceid': '101a34ed0555e0f4a327575ce788b35a', 'X-Envoy-External-Address': '207.171.103.240', 'X-Forwarded-Client-Cert': 'By=spiffe://cluster.local/ns/httpbin-istio/sa/httpbin;Hash=ea1c0e0fbd1a2a4dcfdc36e743ce618cf614b92afb4e5a6b19e7ba9a2ac7ecdb;Subject="";URI=spiffe://cluster.local/ns/istio-system/sa/istio-ingressgateway-service-account'}, 'json': None, 'origin': '207.171.103.240,10.100.91.201', 'url': 'https://httpbin.org/post'}

如果我将 sensor.py 用于我的 Flask 应用程序（注释掉 httpbin.org），则会引发错误： werkzeug.exceptions.HTTPException.wrap.<locals>.newcls: 400 Bad Request: KeyError: 'Date'

Flask 应用代码：

from flask import Flask, make_response, request, render_template, jsonify, make_response
import pandas as pd
from sqlalchemy import create_engine
from pandas.api.types import is_string_dtype
from pandas.api.types import is_numeric_dtype
import requests

app = Flask(__name__)


@app.route('/datainform', methods=['POST'])
def getdatatwo():

    stamp = request.form['Date']
    meterReading = request.form['MeterReading']
    #outTemp = request.form['outTemp']
    print('Date',stamp)
    print('MeterReading',meterReading)

    return 'OK', 200

if __name__ == '__main__':
    app.run(host='0.0.0.0',debug=True)

任何提示都非常感谢...

Answer 1

经过更多测试...我不确定为什么，但将其添加到 Flask 应用程序似乎工作得很好... result = request.form但是没有它代码会出错..

这是整个脚本：

@app.route('/datainform', methods=['POST'])
def getdatatwo():

    result = request.form
    print(result)
    stamp = request.form['Date']
    meterReading = request.form['MeterReading']
    #outTemp = request.form['outTemp']
    print('Date',stamp)
    print('MeterReading',meterReading)

    return 'OK', 200

if __name__ == '__main__':
    app.run(host='0.0.0.0',debug=True)