From e2ebdc06210a45172d65177b7abde66295d3fceb Mon Sep 17 00:00:00 2001
From: junleea <354425203@qq.com>
Date: Sat, 6 Sep 2025 13:54:12 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E4=B8=8B=E8=BD=BD=E4=BB=A3?=
 =?UTF-8?q?=E7=90=86=E6=8E=A5=E5=8F=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 handler/tool.go | 72 +++++++++++++++++++++++++++++++++++++++++++++++++
 proto/conf.go   |  1 +
 2 files changed, 73 insertions(+)

diff --git a/handler/tool.go b/handler/tool.go
index a5192ef..9342803 100644
--- a/handler/tool.go
+++ b/handler/tool.go
@@ -6,7 +6,9 @@ import (
 	"io"
 	"log"
 	"net/http"
+	"net/url"
 	"os"
+	"path/filepath"
 	"strconv"
 	"time"
 	"videoplayer/dao"
@@ -57,6 +59,8 @@ func SetUpToolGroup(router *gin.Engine) {
 	toolGroup.POST("/del_monitor", DelMonitor)         //删除设备监控
 	//发送邮件
 	toolGroup.POST("/send_mail", SendMailTool)
+	//下载代理
+	toolGroup.GET("/dl/:url", DownloadProxyHandle)
 }
 
 func GetMonitorList(c *gin.Context) {
@@ -485,3 +489,71 @@ func SendMailTool(c *gin.Context) {
 	}
 
 }
+
+// DownloadProxyHandle 处理下载代理请求
+func DownloadProxyHandle(c *gin.Context) {
+	key := c.Query("key")
+	if key == "" || key != proto.Config.DOWNLOAD_PROXY_KEY {
+		c.JSON(http.StatusOK, gin.H{"code": proto.ParameterError, "message": "failed, key is null or error"})
+	}
+	// 获取URL参数
+	encodedURL := c.Param("url")
+	if encodedURL == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "URL参数不能为空", "code": proto.ParameterError, "message": "failed"})
+		return
+	}
+
+	// URL解码
+	decodedURL, err := url.QueryUnescape(encodedURL)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "URL解码失败: " + err.Error(), "code": proto.ParameterError, "message": "failed"})
+		return
+	}
+
+	// 验证URL格式
+	parsedURL, err := url.Parse(decodedURL)
+	if err != nil || parsedURL.Scheme == "" || parsedURL.Host == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的URL格式", "code": proto.ParameterError, "message": "failed"})
+		return
+	}
+
+	// 发起请求获取目标资源
+	resp, err := http.Get(decodedURL)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "获取资源失败: " + err.Error(), "code": proto.InternalServerError})
+		return
+	}
+	defer resp.Body.Close()
+
+	// 检查响应状态
+	if resp.StatusCode != http.StatusOK {
+		c.JSON(http.StatusBadGateway, gin.H{"error": "目标资源请求失败，状态码: " + resp.Status, "code": proto.InternalServerError})
+		return
+	}
+
+	// 获取文件名
+	filename := getFilenameFromURL(parsedURL)
+
+	// 设置响应头，告诉浏览器这是一个文件下载
+	c.Header("Content-Disposition", "attachment; filename="+url.QueryEscape(filename))
+	c.Header("Content-Type", resp.Header.Get("Content-Type"))
+	c.Header("Content-Length", resp.Header.Get("Content-Length"))
+
+	// 将响应体流式传输到客户端
+	_, err = io.Copy(c.Writer, resp.Body)
+	if err != nil {
+		// 已经开始传输数据后发生错误，无法返回JSON，只能记录日志
+		log.Println("tool download proxy handle error:", err)
+	}
+}
+
+// 从URL中提取文件名
+func getFilenameFromURL(u *url.URL) string {
+	// 从路径中提取文件名
+	filename := filepath.Base(u.Path)
+	// 如果路径中没有文件名，尝试从查询参数中获取
+	if filename == "" || filename == "/" {
+		filename = "download_file"
+	}
+	return filename
+}
diff --git a/proto/conf.go b/proto/conf.go
index 71d5dbe..0db119b 100644
--- a/proto/conf.go
+++ b/proto/conf.go
@@ -100,6 +100,7 @@ type ConfigStruct struct {
 	MONITOR_SERVER_TOKEN string        `json:"monitor_server_token"` // 监控服务器token,用于状态监控及邮件通知
 	APP_ID               string        `json:"app_id"`               // 应用ID,用于标识不同应用
 	MONITOR_MAIL         []StructValue `json:"monitor_mail"`         // 设备监控邮件通知配置
+	DOWNLOAD_PROXY_KEY   string        `json:"download_proxy_key"`   // 下载代理key
 }
 
 func WriteConfigToFile() {