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ViewsFlask API failing to decode JSON data. Error: "message": "Failed to decode JSON object: Expecting value: line 1 column 1 (char 0)"
I'm setting up a simple rest api using flask and flask-restful. Right now all I'm trying to do is create a post request with some Json data, and then return it just to see if it works. I always get the same error "message": "Failed to decode JSON object: Expecting value: line 1 column 1 (char 0)"
Below is my code
from flask import Flask, jsonify, request
from flask_restful import Resource, Api
app = Flask(__name__)
api = Api(app)
class Tester(Resource):
def get(self):
return {'about': 'Hello World'}
def post(self):
data_json = request.get_json(force=True)
return {'you sent': data_json}
api.add_resource(Tester, '/')
if __name__ == '__main__':
app.run(debug=True)
The curl request I am making to test this is below, I've also tried making request using postman
curl -H "Content-Type: application/json" -X POST -d '{'username':"abc",'password':"abc"}' http://localhost:5000
3 answers
Answer question0
The curl request (payload) is incorrect. Use double quotes in the payload.
curl -H "Content-Type: application/json" -X POST -d '{"username":"abc","password":"abc"}' http://localhost:5000
0
You need to select raw -> JSON (application/json) in Postman like this:
When it comes to your cURL request, answer explains that windows's command line lacks support of strings with single quotes, so use:
curl -i -H "Content-Type: application/json" -X POST -d "{\"username\":\"abc\", \"password\":\"abc\"}" 127.0.0.1:5000
instead:
curl -H "Content-Type: application/json" -X POST -d '{'username':"abc",'password':"abc"}' http://localhost:5000
\ escapes " character.
0
You also need to have the Content-Length header enabled.
