feat(*): go 后端项目脚手架

internal/api/handler/proxy.go

@@ -0,0 +1,42 @@
+package handler
+
+import (
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/zhilv666/navsite/pkg/common"
+)
+
+func Proxy(c *gin.Context) {
+	_url := c.Query("url")
+	if _url == "" {
+		common.Fail(c, "missing url")
+		return
+	}
+	// 请求目标 URL
+	resp, err := http.Get(_url)
+	if err != nil {
+		common.Fail(c, "unable to fetch image")
+		return
+	}
+	defer resp.Body.Close()
+
+	// 检查 Content-Type 是否为图片
+	contentType := resp.Header.Get("Content-Type")
+	if !strings.HasPrefix(contentType, "image/") {
+		common.Fail(c, "not an image file")
+		return
+	}
+
+	// 设置响应 Content-Type
+	c.Writer.Header().Set("Content-Type", contentType)
+
+	// 将图片数据直接写入响应
+	_, err = io.Copy(c.Writer, resp.Body)
+	if err != nil {
+		common.Fail(c, "failed to write image")
+		return
+	}
+}