Fixed: format multilevel json to querystring correctly

src/ng/http.js

@@ -1009,25 +1009,37 @@ function $HttpProvider() {
       }
     }
 
-
-    function buildUrl(url, params) {
-          if (!params) return url;
-          var parts = [];
-          forEachSorted(params, function(value, key) {
-            if (value === null || isUndefined(value)) return;
-            if (!isArray(value)) value = [value];
-
-            forEach(value, function(v) {
-              if (isObject(v)) {
-                v = toJson(v);
-              }
-              parts.push(encodeUriQuery(key) + '=' +
-                         encodeUriQuery(v));
-            });
+		function is(type, obj) {
+      var clas = Object.prototype.toString.call(obj).slice(8, -1);
+      return obj !== undefined && obj !== null && clas === type;
+		}
+
+		function toQueryString(params, parts, pk) {
+      forEachSorted(params, function(value, key) {
+        if (value === null || value === undefined) return;
+        if (pk) key = pk+'['+key+']';
+        if (is('Array',value)) {
+          forEach(value, function(v,i) {
+            if(is('Object', v)){
+              key = key+'['+i+']';
+              toQueryString(v, parts, key);
+            } else {
+              parts.push(encodeUriQuery(key) + '=' + encodeUriQuery(v));
+            }
           });
-          return url + ((url.indexOf('?') == -1) ? '?' : '&') + parts.join('&');
+          return;
+        } else if (is('Object',value)) {
+          return toQueryString(value, parts, key);
         }
+        parts.push(encodeUriQuery(key) + '=' + encodeUriQuery(value));
+      });
+    }
 
-
+    function buildUrl(url, params) {
+      if (!params) return url;
+      var parts = [];
+      toQueryString(params, parts);
+      return url + ((url.indexOf('?') == -1) ? '?' : '&') + parts.join('&');
+    }
   }];
 }

test/ng/httpSpec.js

@@ -432,7 +432,7 @@ describe('$http', function() {
 
 
       it('should jsonify objects in params map', inject(function($httpBackend, $http) {
-        $httpBackend.expect('GET', '/url?a=1&b=%7B%22c%22:3%7D').respond('');
+        $httpBackend.expect('GET', '/url?a=1&b%5Bc%5D=3').respond('');
         $http({url: '/url', params: {a:1, b:{c:3}}, method: 'GET'});
       }));