Angular 2 Proxy Configuration (CORS Headers Issue for local testing)

As part of integrating the WebSphere Commerce REST services in Angular2 application, created bunch of WCS MOCK REST Services for unit testing using SOAP UI. It helps to test multiple scenarios (different data and fail scenarios  ...etc).

You can use SOAPUI or other tools to mock the REST services during the development.

1.       Create and Start mock services (or you may backend services running on different port)

While creating the MOCK Service, I have given following port and host address.


Start the mock services by clicking “run” button, then you can access mock services on http://localhost:4646 

Problem : You will see the problem similar to below when you try to access these MOCK services from the Angular2 App because of cross domain (same origin) policy issues, We can mitigate this by adding Cross-Origin-Resource-Sharing  (CORS) headers in server level , if you backend (api server) supports.


Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://localhost:4646/wcs/resources/store/14321/cart/shipping_modes. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).

Solution:  As I am not using the any backend API server running in my local for adding CORS headers, thought to use the angular2 proxy configuration to bypass this errors.

1.       Create proxy.config.json file under project root directory

2.       Add following in proxy configuration file
  "/localapi/*": {
    "target": "http://localhost:4646",
    "pathRewrite": {
      "^/localapi": ""
    "changeOrigin": true,
    "secure": false,
    "logLevel": "debug"

3.       Then start the local angular dev server as shown below
a.       Using NPM START
Add “—proxy-config proxy.config.json” in package.json as shown below.

b.       Or Using NG SERVE
:/> ng serve –proxy-config proxy.config.json

4.       Use the “/localapi” context while making HTTP call from the angular 2
http.get("/localapi/wcs/resources/store/14321/cart/shipping_modes", options)

5.       Now when you access the application then browser makes call on 4200 port and get response from SOAP UI mock service that is running on 4646.