路徑參數

Gin 支援兩種類型的路徑參數，讓你可以直接從 URL 中擷取值：

:name —— 匹配單一路徑段。例如，/user/:name 匹配 /user/john，但不匹配 /user/ 或 /user。
*action —— 匹配前綴之後的所有內容，包括斜線。例如，/user/:name/*action 匹配 /user/john/send 和 /user/john/。擷取的值包含前導 /。

使用 c.Param("name") 在處理器中取得路徑參數的值。

package main

import (
  "net/http"

  "github.com/gin-gonic/gin"
)

func main() {
  router := gin.Default()

  // This handler will match /user/john but will not match /user/ or /user
  router.GET("/user/:name", func(c *gin.Context) {
    name := c.Param("name")
    c.String(http.StatusOK, "Hello %s", name)
  })

  // However, this one will match /user/john/ and also /user/john/send
  // If no other routers match /user/john, it will redirect to /user/john/
  router.GET("/user/:name/*action", func(c *gin.Context) {
    name := c.Param("name")
    action := c.Param("action")
    message := name + " is " + action
    c.String(http.StatusOK, message)
  })

  router.Run(":8080")
}

測試

# Single parameter -- matches :name
curl http://localhost:8080/user/john
# Output: Hello john

# Wildcard parameter -- matches :name and *action
curl http://localhost:8080/user/john/send
# Output: john is /send

# Trailing slash is captured by the wildcard
curl http://localhost:8080/user/john/
# Output: john is /

另請參閱