Revert the ContentLength conditions for BindBody

Author: 178inaba

bind.go

@@ -67,14 +67,7 @@ func (b *DefaultBinder) BindQueryParams(c Context, i interface{}) error {
 // See MIMEMultipartForm: https://golang.org/pkg/net/http/#Request.ParseMultipartForm
 func (b *DefaultBinder) BindBody(c Context, i interface{}) (err error) {
 	req := c.Request()
-	var isChunked bool
-	for _, enc := range req.TransferEncoding {
-		if enc == "chunked" {
-			isChunked = true
-			break
-		}
-	}
-	if req.ContentLength <= 0 && !isChunked {
+	if req.ContentLength == 0 {
 		return
 	}
 

bind_test.go

@@ -1063,12 +1063,21 @@ func TestDefaultBinder_BindBody(t *testing.T) {
 			expectError:      "code=415, message=Unsupported Media Type",
 		},
 		{
-			name:             "ok, JSON POST bind to struct with: path + query + http.NoBody",
+			name:             "nok, JSON POST with http.NoBody",
 			givenURL:         "/api/real_node/endpoint?node=xxx",
 			givenMethod:      http.MethodPost,
 			givenContentType: MIMEApplicationJSON,
 			givenContent:     http.NoBody,
 			expect:           &Node{ID: 0, Node: ""},
+			expectError:      "code=400, message=EOF, internal=EOF",
+		},
+		{
+			name:             "ok, JSON POST with empty body",
+			givenURL:         "/api/real_node/endpoint?node=xxx",
+			givenMethod:      http.MethodPost,
+			givenContentType: MIMEApplicationJSON,
+			givenContent:     strings.NewReader(""),
+			expect:           &Node{ID: 0, Node: ""},
 		},
 		{
 			name:             "ok, JSON POST bind to struct with: path + query + chunked body",