package main

import (
	"fmt"
	"net/http"
)

func main() {
	// 设置路由和处理函数
	http.HandleFunc("/get-value", func(w http.ResponseWriter, r *http.Request) {
		// 检查请求方法是否为GET
		if r.Method != http.MethodGet {
			http.Error(w, "Invalid request method", http.StatusMethodNotAllowed)
			return
		}

		// 从请求参数中获取"key"的值
		key := r.URL.Query().Get("key")
		if key == "" {
			http.Error(w, "Missing 'key' parameter", http.StatusBadRequest)
			return
		}

		// 根据key返回相应的值（这里可以替换为实际的业务逻辑）
		value := fmt.Sprintf("Value for key '%s'", key)

		// 设置响应头
		w.Header().Set("Content-Type", "text/plain")

		// 返回响应值
		w.WriteHeader(http.StatusOK)
		w.Write([]byte(value))
	})

	// 启动HTTP服务器
	fmt.Println("Server is running on http://localhost:8080")
	err := http.ListenAndServe(":8080", nil)
	if err != nil {
		fmt.Println("Error starting server:", err)
	}
}