Issue #1134: Reinstate postDataString for about:home searches.

netwerk/base/nsIBrowserSearchService.idl

@@ -7,7 +7,7 @@
 interface nsIURI;
 interface nsIInputStream;
 
-[scriptable, uuid(5799251f-5b55-4df7-a9e7-0c27812c469a)]
+[scriptable, uuid(72599f7a-3712-4b93-90e9-86127006cd68)]
 interface nsISearchSubmission : nsISupports
 {
   /**
@@ -20,6 +20,12 @@ interface nsISearchSubmission : nsISupports
    * The URI to submit a search to.
    */
   readonly attribute nsIURI uri;
+  
+  /**
+   * The POST data associated with a search submission as an
+   * application/x-www-form-urlencoded string. May be null.
+   */
+  readonly attribute AString postDataString;
 };
 
 [scriptable, uuid(620bd920-0491-48c8-99a8-d6047e64802d)]

toolkit/components/search/nsSearchService.js

@@ -780,6 +780,7 @@ EngineURL.prototype = {
     }
 
     var postData = null;
+    let postDataString = null;
     if (this.method == "GET") {
       // GET method requests have no post data, and append the encoded
       // query string to the url...
@@ -787,6 +788,7 @@ EngineURL.prototype = {
         url += "?";
       url += dataString;
     } else if (this.method == "POST") {
+      postDataString = dataString;
       // POST method requests must wrap the encoded text in a MIME
       // stream and supply that as POSTDATA.
       var stringStream = Cc["@mozilla.org/io/string-input-stream;1"].
@@ -800,7 +802,7 @@ EngineURL.prototype = {
       postData.setData(stringStream);
     }
 
-    return new Submission(makeURI(url), postData);
+    return new Submission(makeURI(url), postData, postDataString);
   },
 
   _getTermsParameterName: function SRCH_EURL__getTermsParameterName() {
@@ -2409,9 +2411,10 @@ Engine.prototype = {
 };
 
 // nsISearchSubmission
-function Submission(aURI, aPostData = null) {
+function Submission(aURI, aPostData = null, aPostDataString = null) {
   this._uri = aURI;
   this._postData = aPostData;
+  this._postDataString = aPostDataString;
 }
 Submission.prototype = {
   get uri() {
@@ -2420,6 +2423,9 @@ Submission.prototype = {
   get postData() {
     return this._postData;
   },
+  get postDataString() {
+    return this._postDataString;
+  },
   QueryInterface: function SRCH_SUBM_QI(aIID) {
     if (aIID.equals(Ci.nsISearchSubmission) ||
         aIID.equals(Ci.nsISupports))