Closes #980

Signed-off-by: Vishal Rana <vr@labstack.com>

bind.go

@@ -42,6 +42,9 @@ func (b *DefaultBinder) Bind(i interface{}, c Context) (err error) {
 	if err = b.bindPathData(i, c); err != nil {
 		return NewHTTPError(http.StatusBadRequest, err.Error())
 	}
+	if err = b.bindPathData(i, c); err != nil {
+		return NewHTTPError(http.StatusBadRequest, err.Error())
+	}
 	ctype := req.Header.Get(HeaderContentType)
 	switch {
 	case strings.HasPrefix(ctype, MIMEApplicationJSON):
@@ -79,7 +82,10 @@ func (b *DefaultBinder) Bind(i interface{}, c Context) (err error) {
 }
 
 func (b *DefaultBinder) bindPathData(ptr interface{}, c Context) error {
-	m := make(map[string][]string)
+	if reflect.TypeOf(ptr).Elem().Kind() == reflect.Slice {
+		return nil
+	}
+	m := make(map[string][]string, len(c.ParamNames()))
 	for _, key := range c.ParamNames() {
 		m[key] = []string{c.Param(key)}
 	}

bind_test.go

@@ -118,6 +118,7 @@ var values = map[string][]string{
 func TestBindJSON(t *testing.T) {
 	testBindOkay(t, strings.NewReader(userJSON), MIMEApplicationJSON)
 	testBindError(t, strings.NewReader(invalidContent), MIMEApplicationJSON)
+	testBindSlice(t, strings.NewReader(userJSONArray), MIMEApplicationJSON)
 }
 
 func TestBindXML(t *testing.T) {
@@ -349,3 +350,19 @@ func testBindError(t *testing.T, r io.Reader, ctype string) {
 		}
 	}
 }
+
+func testBindSlice(t *testing.T, r io.Reader, ctype string) {
+	e := New()
+	req := httptest.NewRequest(POST, "/", r)
+	rec := httptest.NewRecorder()
+	c := e.NewContext(req, rec)
+	req.Header.Set(HeaderContentType, ctype)
+	us := []user{}
+	err := c.Bind(&us)
+	if assert.NoError(t, err) {
+		assert.Equal(t, 1, us[0].ID)
+		assert.Equal(t, "Jon Snow", us[0].Name)
+		assert.Equal(t, 2, us[1].ID)
+		assert.Equal(t, "Arya Stark", us[1].Name)
+	}
+}

echo_test.go

@@ -25,6 +25,7 @@ type (
 
 const (
 	userJSON         = `{"id":1,"name":"Jon Snow"}`
+	userJSONArray    = `[{"id":1,"name":"Jon Snow"},{"id":2,"name":"Arya Stark"}]`
 	userJSONOnlyName = `{"name":"Jon Snow"}`
 	userXML          = `<user><id>1</id><name>Jon Snow</name></user>`
 	userForm         = `id=1&name=Jon Snow`