RAGFlow go API server (#13240)

# RAGFlow Go Implementation Plan 🚀

This repository tracks the progress of porting RAGFlow to Go. We'll
implement core features and provide performance comparisons between
Python and Go versions.

## Implementation Checklist

- [x] User Management APIs
- [x] Dataset Management Operations
- [x] Retrieval Test
- [x] Chat Management Operations
- [x] Infinity Go SDK

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>
Co-authored-by: Yingfeng Zhang <yingfeng.zhang@gmail.com>

internal/handler/system.go

@@ -0,0 +1,125 @@
+//
+//  Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//
+
+package handler
+
+import (
+	"net/http"
+	"ragflow/internal/server"
+
+	"github.com/gin-gonic/gin"
+
+	"ragflow/internal/service"
+)
+
+// SystemHandler system handler
+type SystemHandler struct {
+	systemService *service.SystemService
+}
+
+// NewSystemHandler create system handler
+func NewSystemHandler(systemService *service.SystemService) *SystemHandler {
+	return &SystemHandler{
+		systemService: systemService,
+	}
+}
+
+// Ping health check endpoint
+// @Summary Ping
+// @Description Simple ping endpoint
+// @Tags system
+// @Produce plain
+// @Success 200 {string} string "pong"
+// @Router /v1/system/ping [get]
+func (h *SystemHandler) Ping(c *gin.Context) {
+	c.String(http.StatusOK, "pong")
+}
+
+// GetConfig get system configuration
+// @Summary Get System Configuration
+// @Description Get system configuration including register enabled status
+// @Tags system
+// @Accept json
+// @Produce json
+// @Success 200 {object} map[string]interface{}
+// @Router /v1/system/config [get]
+func (h *SystemHandler) GetConfig(c *gin.Context) {
+	config, err := h.systemService.GetConfig()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{
+			"code":    500,
+			"message": "Failed to get system configuration",
+		})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"code":    0,
+		"message": "success",
+		"data":    config,
+	})
+}
+
+// GetConfigs get all system configurations
+// @Summary Get All System Configurations
+// @Description Get all system configurations from globalConfig
+// @Tags system
+// @Accept json
+// @Produce json
+// @Success 200 {object} config.Config
+// @Router /v1/system/configs [get]
+func (h *SystemHandler) GetConfigs(c *gin.Context) {
+	cfg := server.GetConfig()
+	if cfg == nil {
+		c.JSON(http.StatusInternalServerError, gin.H{
+			"code":    500,
+			"message": "Configuration not initialized",
+		})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"code":    0,
+		"message": "success",
+		"data":    cfg,
+	})
+}
+
+// GetVersion get RAGFlow version
+// @Summary Get RAGFlow Version
+// @Description Get the current version of the application
+// @Tags system
+// @Accept json
+// @Produce json
+// @Security ApiKeyAuth
+// @Success 200 {object} map[string]interface{}
+// @Router /v1/system/version [get]
+func (h *SystemHandler) GetVersion(c *gin.Context) {
+	version, err := h.systemService.GetVersion()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{
+			"code":    500,
+			"message": "Failed to get version",
+		})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"code":    0,
+		"message": "success",
+		"data":    version.Version,
+	})
+}