重定向
Gin 支持 HTTP 重定向(将客户端发送到不同的 URL)和路由器重定向(在服务器内部将请求转发到不同的处理函数,无需客户端往返)。
HTTP 重定向
使用 c.Redirect 配合适当的 HTTP 状态码来重定向客户端:
- 301 (
http.StatusMovedPermanently) —— 资源已永久移动。浏览器和搜索引擎会更新它们的缓存。 - 302 (
http.StatusFound) —— 临时重定向。浏览器会跟随但不会缓存新 URL。 - 307 (
http.StatusTemporaryRedirect) —— 类似 302,但浏览器必须保留原始 HTTP 方法(对 POST 重定向有用)。 - 308 (
http.StatusPermanentRedirect) —— 类似 301,但浏览器必须保留原始 HTTP 方法。
package main
import ( "net/http"
"github.com/gin-gonic/gin")
func main() { router := gin.Default()
// External redirect (GET) router.GET("/old", func(c *gin.Context) { c.Redirect(http.StatusMovedPermanently, "https://www.google.com/") })
// Redirect from POST -- use 302 or 307 to preserve behavior router.POST("/submit", func(c *gin.Context) { c.Redirect(http.StatusFound, "/result") })
// Internal router redirect (no HTTP round-trip) router.GET("/test", func(c *gin.Context) { c.Request.URL.Path = "/final" router.HandleContext(c) })
router.GET("/final", func(c *gin.Context) { c.JSON(http.StatusOK, gin.H{"hello": "world"}) })
router.GET("/result", func(c *gin.Context) { c.String(http.StatusOK, "Redirected here!") })
router.Run(":8080")}测试
# GET redirect -- follows to Google (use -L to follow, -I to see headers only)curl -I http://localhost:8080/old# Output includes: HTTP/1.1 301 Moved Permanently# Output includes: Location: https://www.google.com/
# POST redirect -- returns 302 with new locationcurl -X POST -I http://localhost:8080/submit# Output includes: HTTP/1.1 302 Found# Output includes: Location: /result
# Internal redirect -- handled server-side, client sees final responsecurl http://localhost:8080/test# Output: {"hello":"world"}