Web基础与HTTP处理

package main

import (
    "fmt"
    "net/http"
)

func helloHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello, World!")
}

func main() {
    http.HandleFunc("/", helloHandler)
    fmt.Println("Server starting on :8080...")
    http.ListenAndServe(":8080", nil)
}

func requestInfo(w http.ResponseWriter, r *http.Request) {
    // 获取请求方法
    method := r.Method
    
    // 获取请求路径
    path := r.URL.Path
    
    // 获取查询参数
    name := r.URL.Query().Get("name")
    
    // 获取请求头
    userAgent := r.Header.Get("User-Agent")
    
    fmt.Fprintf(w, "Method: %s\nPath: %s\nName: %s\nUserAgent: %s", 
        method, path, name, userAgent)
}

func jsonResponse(w http.ResponseWriter, r *http.Request) {
    // 设置Content-Type
    w.Header().Set("Content-Type", "application/json")
    
    // 返回JSON数据
    data := map[string]interface{}{
        "status":  "success",
        "message": "Hello, JSON!",
    }
    json.NewEncoder(w).Encode(data)
}

func errorResponse(w http.ResponseWriter, r *http.Request) {
    // 返回错误状态码
    w.WriteHeader(http.StatusNotFound)
    fmt.Fprint(w, "404 Not Found")
}

func main() {
    // 提供静态文件服务
    fs := http.FileServer(http.Dir("static"))
    http.Handle("/static/", http.StripPrefix("/static/", fs))
    
    http.ListenAndServe(":8080", nil)
}