fix($httpParamSerializerJQLike): Follow jQuery parameter serialization logic

Follow jQuery parameter serialization logic for nested objects.

Closes #11551

Author: lgalfaso

src/ng/http.js

@@ -11,30 +11,56 @@ var JSON_PROTECTION_PREFIX = /^\)\]\}',?\n/;
 
 function paramSerializerFactory(jQueryMode) {
 
+  return jQueryMode ? jQueryLikeParamSerializer : paramSerializer;
+
   function serializeValue(v) {
     if (isObject(v)) {
       return isDate(v) ? v.toISOString() : toJson(v);
     }
     return v;
   }
 
-  return function paramSerializer(params) {
+  function paramSerializer(params) {
     if (!params) return '';
     var parts = [];
     forEachSorted(params, function(value, key) {
       if (value === null || isUndefined(value)) return;
-      if (isArray(value) || isObject(value) && jQueryMode) {
+      if (isArray(value)) {
         forEach(value, function(v, k) {
-          var keySuffix = jQueryMode ? '[' + (!isArray(value) ? k : '') + ']' : '';
-          parts.push(encodeUriQuery(key + keySuffix)  + '=' + encodeUriQuery(serializeValue(v)));
+          parts.push(encodeUriQuery(key)  + '=' + encodeUriQuery(serializeValue(v)));
         });
       } else {
         parts.push(encodeUriQuery(key) + '=' + encodeUriQuery(serializeValue(value)));
       }
     });
 
     return parts.length > 0 ? parts.join('&') : '';
-  };
+  }
+
+  function jQueryLikeParamSerializer(params) {
+    if (!params) return '';
+    var parts = [];
+    serialize(params, '', true);
+    return parts.length > 0 ? parts.join('&') : '';
+
+    function serialize(toSerialize, prefix, topLevel) {
+      if (toSerialize === null || isUndefined(toSerialize)) return;
+      if (isArray(toSerialize)) {
+        forEach(toSerialize, function(value) {
+          serialize(value, prefix + '[]');
+        });
+      } else if (isObject(toSerialize)) {
+        forEachSorted(toSerialize, function(value, key) {
+          serialize(value, prefix +
+              (topLevel ? '' : '[') +
+              key +
+              (topLevel ? '' : ']'));
+        });
+      } else {
+        parts.push(encodeUriQuery(prefix) + '=' + encodeUriQuery(serializeValue(toSerialize)));
+      }
+    }
+  }
 }
 
 function $HttpParamSerializerProvider() {

test/ng/httpSpec.js

@@ -2014,6 +2014,12 @@ describe('$http param serializers', function() {
       expect(jqrSer({a: 'b', foo: {'bar': 'barv', 'baz': 'bazv'}})).toEqual('a=b&foo%5Bbar%5D=barv&foo%5Bbaz%5D=bazv');
                                                                            //a=b&foo[bar]=barv&foo[baz]=bazv
     });
+
+    it('should serialize nested objects by repeating param name with [kay] suffix', function() {
+      expect(jqrSer({a: ['b', {c: 'd'}], e: {f: 'g', 'h': ['i', 'j']}})).toEqual(
+         'a%5B%5D=b&a%5B%5D%5Bc%5D=d&e%5Bf%5D=g&e%5Bh%5D%5B%5D=i&e%5Bh%5D%5B%5D=j');
+         //a[]=b&a[][c]=d&e[f]=g&e[h][]=i&e[h][]=j
+    });
   });
 
 });