feat(binding): add support for encoding.UnmarshalText in uri/query binding

context.go

@@ -989,8 +989,7 @@ func (c *Context) ClientIP() string {
 
 	if trusted && c.engine.ForwardedByClientIP && c.engine.RemoteIPHeaders != nil {
 		for _, headerName := range c.engine.RemoteIPHeaders {
-			headerValue := strings.Join(c.Request.Header.Values(headerName), ",")
-			ip, valid := c.engine.validateHeader(headerValue)
+			ip, valid := c.engine.validateHeader(c.requestHeader(headerName))
 			if valid {
 				return ip
 			}

context_test.go

@@ -1143,37 +1143,6 @@ func TestContextRenderNoContentIndentedJSON(t *testing.T) {
 	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
-func TestContextClientIPWithMultipleHeaders(t *testing.T) {
-	c, _ := CreateTestContext(httptest.NewRecorder())
-	c.Request, _ = http.NewRequest(http.MethodGet, "/test", nil)
-
-	// Multiple X-Forwarded-For headers
-	c.Request.Header.Add("X-Forwarded-For", "1.2.3.4, "+localhostIP)
-	c.Request.Header.Add("X-Forwarded-For", "5.6.7.8")
-	c.Request.RemoteAddr = localhostIP + ":1234"
-
-	c.engine.ForwardedByClientIP = true
-	c.engine.RemoteIPHeaders = []string{"X-Forwarded-For"}
-	_ = c.engine.SetTrustedProxies([]string{localhostIP})
-
-	// Should return 5.6.7.8 (last non-trusted IP)
-	assert.Equal(t, "5.6.7.8", c.ClientIP())
-}
-
-func TestContextClientIPWithSingleHeader(t *testing.T) {
-	c, _ := CreateTestContext(httptest.NewRecorder())
-	c.Request, _ = http.NewRequest(http.MethodGet, "/test", nil)
-	c.Request.Header.Set("X-Forwarded-For", "1.2.3.4, "+localhostIP)
-	c.Request.RemoteAddr = localhostIP + ":1234"
-
-	c.engine.ForwardedByClientIP = true
-	c.engine.RemoteIPHeaders = []string{"X-Forwarded-For"}
-	_ = c.engine.SetTrustedProxies([]string{localhostIP})
-
-	// Should return 1.2.3.4
-	assert.Equal(t, "1.2.3.4", c.ClientIP())
-}
-
 // Tests that the response is serialized as Secure JSON
 // and Content-Type is set to application/json
 func TestContextRenderSecureJSON(t *testing.T) {