refactor(server):重构HTTP服务器实现

- 将原始main函数中的HTTP处理逻辑拆分到独立文件
- 新增main1.go实现基础HTTP服务器功能
- 新增main2.go增强路由处理和重定向逻辑
- 新增main3.go使用标准库处理程序优化代码结构
- 更新main.go调用新的main3函数并注释其他入口点
- 移除main.go中旧的HTTP处理相关导入和类型定义

24-httpserver/httpserver/main3.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"io"
+	"net/http"
+)
+
+type StringHandle3 struct {
+	message string
+}
+
+func (sh *StringHandle3) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
+	Printfln("Request for %v", request.URL.Path)
+	io.WriteString(writer, sh.message)
+}
+
+func main3() {
+	http.Handle("/message", &StringHandle3{message: "Hello World!"})
+	http.Handle("/favicon.ico", http.NotFoundHandler())
+	http.Handle("/", http.RedirectHandler("/message", http.StatusTemporaryRedirect))
+	err := http.ListenAndServe("localhost:5000", nil)
+	if err != nil {
+		Printfln("ListenAndServe Error: %v", err)
+		return
+	}
+}