CORS-api-server

CORS-api-server is a NodeJS proxy which adds CORS headers to the proxied request.

The url to proxy is literally taken from the path, validated and proxied. The protocol part of the proxied URI is optional, and defaults to "http". If port 443 is specified, the protocol defaults to "https". This package does not put any restrictions on the http methods or headers, except for cookies. The app can be configured to require a header for proxying a request, for example to avoid a direct visit from the browser.

Just append https://cors-request-api-server.herokuapp.com/ before XMLHttpRequest url

Example:

Im using this to fetching data from steam web api:

https://cors-request-api-server.herokuapp.com/http://api.steampowered.com/ISteamApps/GetAppList/v0002/?key=XXXXXXXXXXXXXXXXXX&format=json

Example

// Listen on a specific host via the HOST environment variable
var host = process.env.HOST || '0.0.0.0';
// Listen on a specific port via the PORT environment variable
var port = process.env.PORT || 8080;

var cors_proxy = require('mycors');
cors_proxy.createServer({
    originWhitelist: [], // Allow all origins
    requireHeader: ['origin', 'x-requested-with'],
    removeHeaders: ['cookie', 'cookie2']
}).listen(port, host, function() {
    console.log('Running MYCORS on ' + host + ':' + port);
});

Request examples:

http://localhost:8080/http://google.com/ - Google.com with CORS headers
http://localhost:8080/google.com - Same as previous.
http://localhost:8080/google.com:443 - Proxies https://google.com/
http://localhost:8080/ - Shows usage text, as defined in libs/help.txt
http://localhost:8080/favicon.ico - Replies 404 Not found

Documentation

Client

If you want to automatically enable cross-domain requests when needed, use the following snippet:

(function() {
    var cors_api_host = 'cors-request-api-server.herokuapp.com';
    var cors_api_url = 'https://' + cors_api_host + '/';
    var slice = [].slice;
    var origin = window.location.protocol + '//' + window.location.host;
    var open = XMLHttpRequest.prototype.open;
    XMLHttpRequest.prototype.open = function() {
        var args = slice.call(arguments);
        var targetOrigin = /^https?:\/\/([^\/]+)/i.exec(args[1]);
        if (targetOrigin && targetOrigin[0].toLowerCase() !== origin &&
            targetOrigin[1] !== cors_api_host) {
            args[1] = cors_api_url + args[1];
        }
        return open.apply(this, args);
    };
})();

If you're using jQuery, you can also use the following code instead of the previous one:

jQuery.ajaxPrefilter(function(options) {
    if (options.crossDomain && jQuery.support.cors) {
        options.url = 'https://cors-request-api-server.herokuapp.com/' + options.url;
    }
});

License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

sourabh48 / CORS-api-server