javascript access to xmlhttprequest at from origin 'null' has been blocked by cors policy
//Open the HTML file using live server, it will work
javascript access to xmlhttprequest at from origin 'null' has been blocked by cors policy
//Open the HTML file using live server, it will work
Access to XMLHttpRequest at from origin HTTP localhost:3000 has been blocked by CORS policy
const cors = require('cors');
const corsOptions ={
origin:'http://localhost:3000',
credentials:true, //access-control-allow-credentials:true
optionSuccessStatus:200
}
app.use(cors(corsOptions));
Access to XMLHttpRequest has been blocked by CORS policy
/*
npm i cors
or
yarn add cors
then in your node app
*/
const cors = require('cors');
const corsOptions ={
origin:'http://localhost:3000',
credentials:true, //access-control-allow-credentials:true
optionSuccessStatus:200
}
app.use(cors(corsOptions));
Access to XMLHttpRequest at 'http://localhost/MySQL_pracs/InsertUser.php' from origin 'http://localhost:4200' has been blocked by CORS policy: Request header field content-type is not allowed by Access-Control-Allow-Headers in preflight response.
//Access to XMLHttpRequest at 'http://localhost/[api path].php' from origin 'http://localhost:4200' has been blocked by CORS policy: Request header field content-type is not allowed by Access-Control-Allow-Headers in preflight response.
//The error is simply saying that "Content-Type" is missing from "Access-Control-Allow-Headers".
//Therefore we need to add "Content-Type" to "Access-Control-Allow-Headers".
<?php
header('Access-Control-Allow-Headers: Content-Type');
-----
?>
ccess to XMLHttpRequest at 'http://127.0.0.1:5000/ has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
@app.route('your route', methods=['GET'])
def yourMethod(params):
response = flask.jsonify({'some': 'data'})
response.headers.add('Access-Control-Allow-Origin', '*')
return response
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