feat($httpParamSerializerJQLike): honor object.toJSON function if present.

Author: gabrielmaldi

src/ng/http.js

@@ -112,12 +112,19 @@ function $HttpParamSerializerJQLikeProvider() {
       return parts.join('&');
 
       function serialize(toSerialize, prefix, topLevel) {
-        if (toSerialize === null || isUndefined(toSerialize)) return;
+        if (toSerialize === null || isUndefined(toSerialize) || isFunction(toSerialize)) return;
         if (isArray(toSerialize)) {
           forEach(toSerialize, function(value, index) {
             serialize(value, prefix + '[' + (isObject(value) ? index : '') + ']');
           });
-        } else if (isObject(toSerialize) && !isDate(toSerialize)) {
+        } else if (isFunction(toSerialize.toJSON)) {
+          var toJsonResult = toSerialize.toJSON();
+          if (isString(toJsonResult)) {
+            parts.push(encodeUriQuery(prefix) + '=' + encodeUriQuery(toJsonResult));
+          } else {
+            serialize(toJsonResult, prefix, topLevel);
+          }
+        } else if (isObject(toSerialize)) {
           forEachSorted(toSerialize, function(value, key) {
             serialize(value, prefix +
                 (topLevel ? '' : '[') +

test/ng/httpSpec.js

@@ -2049,6 +2049,48 @@ describe('$http param serializers', function() {
       expect(jqrSer({someDate: new Date('2014-07-15T17:30:00.000Z')})).toEqual('someDate=2014-07-15T17:30:00.000Z');
     });
 
+    it('should ignore functions', function() {
+      expect(jqrSer({
+        foo: {
+          a: 'b',
+          c: function() {
+            return 'd';
+          }
+        }
+      })).toEqual('foo%5Ba%5D=b');
+    });
+
+    it('should honor toJSON function which returns a string', function() {
+      expect(jqrSer({
+        foo: {
+          a: 'b',
+          toJSON: function() {
+            return 'baz';
+          }
+        },
+        bar: {
+          c: 'd'
+        }
+      })).toEqual('bar%5Bc%5D=d&foo=baz');
+    });
+
+    it('should honor toJSON function which returns an object', function() {
+      expect(jqrSer({
+        foo: {
+          a: 'b',
+          toJSON: function() {
+            return {
+              e: 'f',
+              g: 'h'
+            };
+          }
+        },
+        bar: {
+          c: 'd'
+        }
+      })).toEqual('bar%5Bc%5D=d&foo%5Be%5D=f&foo%5Bg%5D=h');
+    });
+
   });
 
   describe('default array serialization', function() {