Flask的Javascript REST API错误

Question

I have deployed a flask framework on the pythonanywhere website, with the following code, whose third method handles rest requests:

from flask import Flask
from flask import jsonify
app = Flask(__name__)
@app.route('/')
def hello_world():
    return 'Hello from Sachin Flask!'
@app.route('/getval')
def getter():
    return '3'
@app.route('/get', methods=['GET'])
def get_task():
    return jsonify({"tasks": "tas",})

Website: https://sachk480.pythonanywhere.com/

I wrote a simple javascript getter which grabs the data from the /get url and displays it to the console, but I keep receiving this error:

Uncaught SyntaxError: Unexpected token :

This error points to the JSON data and its format, and I am not sure what is going wrong here.

Javascript getter: https://jsfiddle.net/sachinkonan480/04bx0sye/5/

Answer 1

PythonAnywhere dev here, when I visit your site I see an error:

https://sachk480.pythonanywhere.com/get

My guess is that your app is actually returning a 500 error, which is not valid json, so that's why your javascript can't parse it.

have a look at your error log on pythonanywhere? there's a few tips on debugging common problems here: http://help.pythonanywhere.com/pages/DebuggingImportError

Answer 2

问题是您的字典中最后一个值后面有逗号，这不是有效的json