feat: 添加更新路由，支持获取最新版本信息，并实现相关测试用例

atsf_server/controller/update.go

@@ -0,0 +1,77 @@
+package controller
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/gin-gonic/gin"
+)
+
+const latestReleaseURL = "https://api.github.com/repos/Rain-kl/ATSFlare/releases/latest"
+
+var updateHTTPClient = &http.Client{
+	Timeout: 10 * time.Second,
+}
+
+type latestReleaseResponse struct {
+	TagName     string `json:"tag_name"`
+	Body        string `json:"body"`
+	HTMLURL     string `json:"html_url"`
+	PublishedAt string `json:"published_at"`
+}
+
+func GetLatestRelease(c *gin.Context) {
+	req, err := http.NewRequestWithContext(c.Request.Context(), http.MethodGet, latestReleaseURL, nil)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{
+			"success": false,
+			"message": "创建更新请求失败",
+		})
+		return
+	}
+	req.Header.Set("Accept", "application/vnd.github+json")
+	req.Header.Set("User-Agent", "ATSFlare-Server")
+
+	resp, err := updateHTTPClient.Do(req)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{
+			"success": false,
+			"message": fmt.Sprintf("获取最新版本失败: %v", err),
+		})
+		return
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		c.JSON(http.StatusOK, gin.H{
+			"success": false,
+			"message": fmt.Sprintf("GitHub 返回异常状态: %s", resp.Status),
+		})
+		return
+	}
+
+	var release latestReleaseResponse
+	if err = json.NewDecoder(resp.Body).Decode(&release); err != nil {
+		c.JSON(http.StatusOK, gin.H{
+			"success": false,
+			"message": "解析最新版本信息失败",
+		})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"success": true,
+		"message": "",
+		"data":    release,
+	})
+}
+
+func UpdateHTTPClientForTest() *http.Client {
+	return updateHTTPClient
+}
+
+func SetUpdateHTTPClientForTest(client *http.Client) {
+	updateHTTPClient = client
+}