我正在尝试使用jquery将json数据传递到flask。您可以看到以下代码：
app.py
from flask import Flask, request, jsonify, render_template
from flask_mysqldb import MySQL
import time
import datetime
import json
app = Flask(__name__,template_folder='/home/tobias/Documents')
app.config['MYSQL_HOST'] = 'xxxx'
app.config['MYSQL_USER'] = 'xxxx'
app.config['MYSQL_PASSWORD'] = 'xxxx'
app.config['MYSQL_DB'] = 'xxxx'
mysql = MySQL(app)
#datahora1=time.gmtime(time.time())
#tempo=datetime.datetime.strptime(str(datahora1[2])+"/"+str(datahora1[1])+"/"+str(datahora1[0])+" 00:00:00", '%d/%m/%Y %H:%M:%S')
@app.route('/')
def index():
return render_template('index3.html')
@app.route('/process', methods=['GET','POST'])
def process():
local=request.get_json()
datastore = json.loads(local)
tempo=datastore["datahora"]
print("local")
# tempo=request.form["datahora"]
# datahora1=time.gmtime(time.time())
# tempo=datetime.datetime.strptime(str(datahora1[2])+"/"+str(datahora1[1])+"/"+str(datahora1[0])+" 00:00:00", '%d/%m/%Y %H:%M:%S')
cur = mysql.connection.cursor()
cur.execute("SELECT datahora,lat,lon,wdir,wspd,gst,\
wvht,dpd,apd,mwd,pres,ptdy,atmp,wtmp FROM ndbc WHERE datahora>='%s'\
ORDER BY datahora DESC" % (tempo))
row_headers=[x[0] for x in cur.description]
rv = cur.fetchall()
json_data=[]
for result in rv:
result1=[result[0].strftime('%d/%m/%Y %H:%M:%S'),result[1],result[2],result[3],result[4],result[5],result[6],result[7],result[8],result[9],result[10],result[11],result[12],result[13]]
json_data.append(dict(zip(row_headers,result1)))
cur.close()
return json.dumps(json_data)
if __name__ == '__main__':
app.run(debug=True)
index3.html
<!DOCTYPE html>
<html>
<script
src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js">
</script>
<input type="checkbox" id="WAVESCHECK" value="WAVESCHECK" CHECKED> WAVESCHECK
<input type="checkbox" id="NDBC" value="NDBC" CHECKED> NDBC
<br />
<input type="button" name="Check_All" value="MARCAR TODOS"
onClick="CheckAll(document)">
<input type="button" name="Un_CheckAll" value="DESMARCAR TODOS"
onClick="UnCheckAll(document)">
Início <input type="date" id="theDate">
<input type="button" name="vermapa" value="VER"
onClick="buscarbanco(document)">
<input id="demo" value="VER"></p>
<SCRIPT LANGUAGE="JavaScript">
<!--
<!-- Begin
var server="http://localhost:5000";
var date = new Date();
var day = date.getDate();
var month = date.getMonth() + 1;
var year = date.getFullYear();
if (month < 10) month = "0" + month;
if (day < 10) day = "0" + day;
var today = year + "-" + month + "-" + day;
document.getElementById("theDate").value = today;
function CheckAll(document) {
document.getElementById("WAVESCHECK").checked=true;
document.getElementById("NDBC").checked=true;
}
function UnCheckAll(document){
document.getElementById("WAVESCHECK").checked=false;
document.getElementById("NDBC").checked=false;
}
</script>
<SCRIPT LANGUAGE="JavaScript">
<!--
<!-- Begin
$( function(){
$( "#vermapa").click(function(){
if ($('#NDBC').prop('checked'))
{
var appdir='/process';
var teste = ($('#theDate').val());
// myObj = {"estacao": "ndbc", "tempo": teste};
//jsonify to send to the server
$.ajax({
type: "POST",
url: appdir,
contentType: "application/json; charset=utf-8",
data: {
local : "ndbc",
datahora : $('#theDate').val()
},
dataType: 'json'
}).done(function(data){
console.log(data);
});
};
});
});
</script>
app.py从jquery接收json数据，如下所示：
data: {
local : "ndbc",
datahora : $('#theDate').val()
}
因此，我运行app.py并打开Web浏览器。当我点击“ VER”按钮时，我在app.py代码中遇到了以下错误：
File "/home/tobias/.local/lib/python3.6/site-packages/flask/app.py", line 2309, in __call__
return self.wsgi_app(environ, start_response)
File "/home/tobias/.local/lib/python3.6/site-packages/flask/app.py", line 2295, in wsgi_app
response = self.handle_exception(e)
File "/home/tobias/.local/lib/python3.6/site-packages/flask/app.py", line 1741, in handle_exception
reraise(exc_type, exc_value, tb)
File "/home/tobias/.local/lib/python3.6/site-packages/flask/_compat.py", line 35, in reraise
raise value
File "/home/tobias/.local/lib/python3.6/site-packages/flask/app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "/home/tobias/.local/lib/python3.6/site-packages/flask/app.py", line 1815, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/home/tobias/.local/lib/python3.6/site-packages/flask/app.py", line 1718, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/home/tobias/.local/lib/python3.6/site-packages/flask/_compat.py", line 35, in reraise
raise value
File "/home/tobias/.local/lib/python3.6/site-packages/flask/app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "/home/tobias/.local/lib/python3.6/site-packages/flask/app.py", line 1799, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/home/tobias/Documents/app.py", line 30, in process
datastore = json.loads(local)
File "/usr/lib/python3.6/json/__init__.py", line 348, in loads
'not {!r}'.format(s.__class__.__name__))
TypeError: the JSON object must be str, bytes or bytearray, not 'NoneType'
当我将json数据传递给python时，我认为我做错了。有人可以帮助我尝试找到代码中的错误吗？