Setting headers with request

As of Breeze 0.70.1 we now support for the ability to completely customize or replace any ajax communication between the breeze client and the web service on the server.

The Breeze documentation on our Ajax support is still in progress, but hopefully the following will get you started.

To control the headers on every ajax request that breeze makes you can execute the following code when your app first starts up.

     var ajaxImpl = breeze.core.config.getAdapterInstance("ajax");
     ajaxImpl.defaultSettings = {
           headers: {
               // any CORS or other headers that you want to specify.
               "X-Test-Header": "foo2"
           },
    };
  
Alternatively, you can intercept the individual ajax calls and add your headers selectively based on the request.

     var ajaxImpl = breeze.core.config.getAdapterInstance("ajax");
     ajaxImpl.defaultSettings = {
           beforeSend: function(jqXHR, settings) {
                  // examine the jqXHR or settings and customize the headers accordingly.
                  jqXHR.setRequestHeader("X-Test-Before-Send-Header", "foo2");
           }
     };

Great question!, and an oversight on our part.  We will be adding support for custom ajax headers in the next release, (or very soon thereafter).  I can give you a fix that involves hacking the source as a temporary fix if you need something sooner.