将数据从html发送到pythonflask服务器“GET/HTTP/1.1”405错误

Question

very new to python/AJAX and have been piecing everything from examples on the internet/flask documentation and I've gotten so far. Basically what I am trying to do is send latitude and longitude coordinates on a click (from mapbox API) to flask, and have that data print to console (to prove it has successfully gone Flask so I can work with it later).

data I am trying to send is formatted as:

LngLat {lng: 151.0164794921875, lat: -33.79572045486767}

HTML:

<button onclick=submit() type="button">POST</button>

<script>    
map.on('click', function (e) { 
console.log(e.lngLat)
});

function submit() {
var myData = e.lngLat
$.post( "/", $( "myData" ).serialize() 
);
}
</script>

PY:

from flask import Flask
from flask import request
from flask import render_template

app = Flask(__name__)

@app.route('/', methods=['POST'])
def home():
return render_template('index.html')
print(request.form['myData'])

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

when I try to run from console to localhost:5000 I get the error

127.0.0.1 - - [23/Sept/2016 23:21:15] "GET / HTTP/1.1" 405 - 

I'm sorry if this is a silly question but I'm stumped for now! Thank you for your input

Answer 1

In your route, allow GET method, otherwise the html wil never render.

@app.route('/', methods=['POST', 'GET'])

To print lat/lng to the console, first check if the method is POST , then print it:

if request.method == 'POST':
    print(request.form.get('lng'), request.form.get('lat'))

This is the resulting code for the route:

@app.route('/', methods=['POST', 'GET'])
def home():
    if request.method == 'POST':
        print(request.form.get('lng'), request.form.get('lat'))
    return render_template('index.html')

Answer 2

The reason you are getting 405 error is because you only have home() controller, that accept only POST methods. And you are trying to get response with GET method.

So you need to change methods argument in @app.route() decorator

@app.route('/', methods=['GET', 'POST'])
def home():
    return render_template('index.html')

But still, you don't have any code that would handle your AJAX request.