I am new to node.js and trying to make Rest API, now my REST API working fine but whenever i called this services through angularjs, it gives me "access-control-allow-origin" error. However, i added this code on server side :-
var express = require("express");
var app = express();
var router = express.Router();
app.use(function (req, res, next) {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Methods', 'GET, OPTIONS');
res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization');
res.header('Access-Control-Allow-Credentials', true);
return next();
});
But its not working for me, i searched a lot but didn't get feasible solution, please help me out.
You are using http module of angular, if yes, then Angular sends a pre-flight options before actual request. Your server should return 20X for OPTIONS for angular to make actual request.
You can avoid this by handling OPTIONS separately ,
app.use(function (req, res, next) {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Methods', 'GET, OPTIONS');
res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization');
res.header('Access-Control-Allow-Credentials', true);
if (req.method == "OPTIONS") {
response.statusCode = 200 //although correct code should be 204,
return;
}
return next();
});
Also a more exhaustive and less restrictive CORS filter will look like below, use it as per your need
resp.header("Access-Control-Allow-Origin", "*");
resp.header("Access-Control-Allow-Credentials", "true");
resp.header("Access-Control-Allow-Methods", "POST, GET, PUT,PATCH, OPTIONS, DELETE");
resp.header("Access-Control-Max-Age", "3600");
resp.header("Access-Control-Allow-Headers", "X-Requested-With, Content-Type, Authorization, Origin, Accept, Access-Control-Request-Method, Access-Control-Request-Headers");
resp.header("Access-Control-Expose-Headers", "Authorization");
The browser sends a preflight
request before making the actual request. You need to add code for handling this requests, Try this in your server side code.
const cors = require('cors')
const corsOptions = {
origin: '*'
}
app.use(cors(corsOptions))
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