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How to call a JavaEE REST web service with BASIC Authentication using jquery ajax

I don't really remember when I coded it, nor where I got it but I'm writing it here for future use :-)
Below is the code I use to test CORS, http://en.wikipedia.org/wiki/Cross-origin_resource_sharing.

<script
  src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script type="text/javascript">
 var $ = jQuery.noConflict();
 
 $.aja(angry) {
  cache: false,
  crossDomain: true,
  dataType: "json",
  url: "http://czetsuya/myService/meMethod",
  type: "GET",
  success: function( jsonObj, textStatus, xhr ) {
   var htmlContent = $( "#logMsgDiv" ).html( ) + "<p>" + jsonObj.message + "</p>";
   $( "#logMsgDiv" ).html( htmlContent );
  },
  beforeSend: function (xhr) {
   xhr.setRequestHeader ("Authorization", "Basic " + btoa("username:password")); 
  },
  error: function( xhr, textStatus, errorThrown ) {
   console.log( "HTTP Status: " + xhr.status );
   console.log( "Error textStatus: " + textStatus );
   console.log( "Error thrown: " + errorThrown );
  }
 } );
</script>

And here are the javaEE filters.

import java.io.IOException;

import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerRequestFilter;
import javax.ws.rs.container.PreMatching;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.Provider;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Edward P. Legaspi
 **/
@Provider
@PreMatching
public class RESTCorsRequestFilter implements ContainerRequestFilter {

 private final static Logger log = LoggerFactory
   .getLogger(RESTCorsRequestFilter.class.getName());

 @Override
 public void filter(ContainerRequestContext requestCtx) throws IOException {
  // When HttpMethod comes as OPTIONS, just acknowledge that it accepts...
  if (requestCtx.getRequest().getMethod().equals("OPTIONS")) {
   log.debug("HTTP Method (OPTIONS) - Detected!");

   // Just send a OK signal back to the browser
   requestCtx.abortWith(Response.status(Response.Status.OK).build());
  }
 }

}

import java.io.IOException;

import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;
import javax.ws.rs.container.PreMatching;
import javax.ws.rs.ext.Provider;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Edward P. Legaspi
 **/
@Provider
@PreMatching
public class RESTCorsResponseFilter implements ContainerResponseFilter {
 private final static Logger log = LoggerFactory
   .getLogger(RESTCorsResponseFilter.class.getName());

 @Override
 public void filter(ContainerRequestContext requestCtx,
   ContainerResponseContext responseCtx) throws IOException {
  log.debug("Adding CORS to the response.");

  responseCtx.getHeaders().add("Access-Control-Allow-Origin", "*");
  responseCtx.getHeaders()
    .add("Access-Control-Allow-Credentials", "true");
  responseCtx.getHeaders().add("Access-Control-Allow-Methods",
    "GET, POST, DELETE, PUT");
 }

}

If you are using RESTEasy just like I'm usually am. You can take advantage of the already available CorsFilter class:

package com.weddinghighway.api.rest.filter;

import javax.ws.rs.core.Feature;
import javax.ws.rs.core.FeatureContext;
import javax.ws.rs.ext.Provider;

import org.jboss.resteasy.plugins.interceptors.CorsFilter;

/**
 * @author Edward P. Legaspi
 * @created 5 Oct 2017
 */

@Provider
public class RESTCorsResponseFilter implements Feature {

    @Override
    public boolean configure(FeatureContext context) {
        CorsFilter corsFilter = new CorsFilter();
        corsFilter.getAllowedOrigins().add("*");
        context.register(corsFilter);
        return true;
    }
}

Note: If one fails, then just try the other :-)

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