title: webservice call using Post
body: <p>I am new to webservice and ajax .. I tried to call a webservice using POST method.
  I tried to invoke it using Postman (Google chrome App) and I was getting the response but when I tried using Ajax  I am getting error
  Following are the things I did:</p>
  
  <p>My Code: (I wrote a JS in which I included following code and tried all the commented options too ):</p>
  
  <pre><code>$.ajax({
      crossDomain: true,
      url : 'https://yxyxyxyxyx/search/v1/query.json', 
      type : 'POST',
      dataType : "json",
      data: {appId: "a9b475a079",query: "dhcp"},
      //async : true,
      //headers: {"Content-type": "application/json"},
      headers: { 'Access-Control-Allow-Origin': '*' },
      //contentType: "application/json; charset=utf-8",
      //headers: ('Access-Control-Allow-Methods: GET, POST, OPTIONS'),
      //headers: ('Access-Control-Allow-Headers: Origin, Content-Type, Accept, Authorization, X-Request-With'),
      //headers: ('Access-Control-Allow-Credentials: true'),
      // Access-Control-Allow-Origin: "http://localhost:8080",
      // headers: { 'Access-Control-Allow-Origin': '*' },
      //userAgent : 'Mozilla/22.0',
  
      success: function(data){
  
       alert("hi success");
      },
      error: function(data) {alert("An error occured: " + data.status + " " + data.statusText);
      });
  </code></pre>
  
  <p>I am getting the alert in the error and getting following error while debugging:</p>
  
  <pre><code>XMLHttpRequest cannot load https://www.sample.search/v1/query.json. The request was redirected to 'https://www.sample/obrareq.cgi?wh%3DCCI-STG4%20wu%3D%2Fuesps%…n-tools-stage.cisco.com%20ru%3D%252Fuesps%252Fsearch%252Fv1%252Fquery.json', which is disallowed for cross-origin requests that require preflight.
  </code></pre>
  
  <p>I tried all the options to resolve the CROS option in which I found on net… do we have any other way to resolve it.</p>
  
  <p>Can someone help me if we can do it using a java class that will also serve the purpose </p>