Go语言中的Web服务器开发详细指南

package main

import (
    "fmt"
    "net/http"
)

// 处理根路径的请求
func homeHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Welcome to the home page!")
}

// 处理 /about 路径的请求
func aboutHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "This is the about page.")
}

func main() {
    // 注册处理函数
    http.HandleFunc("/", homeHandler)
    http.HandleFunc("/about", aboutHandler)

    // 启动服务器，监听 8080 端口
    fmt.Println("Server is starting on port 8080...")
    if err := http.ListenAndServe(":8080", nil); err != nil {
        fmt.Println("Error starting server:", err)
    }
}

package main

import (
    "fmt"
    "net/http"
)

func main() {
    // 注册文件服务器处理函数
    http.Handle("/files/", http.StripPrefix("/files/", http.FileServer(http.Dir("./public"))))

    // 启动服务器，监听 8080 端口
    fmt.Println("File server is starting on port 8080...")
    if err := http.ListenAndServe(":8080", nil); err != nil {
        fmt.Println("Error starting server:", err)
    }
}

package main

import (
    "fmt"
    "net/http"
)

// 处理 GET 请求
func getHandler(w http.ResponseWriter, r *http.Request) {
    if r.Method == http.MethodGet {
        fmt.Fprintf(w, "This is a GET request.")
    }
}

// 处理 POST 请求
func postHandler(w http.ResponseWriter, r *http.Request) {
    if r.Method == http.MethodPost {
        fmt.Fprintf(w, "This is a POST request.")
    }
}

func main() {
    http.HandleFunc("/get", getHandler)
    http.HandleFunc("/post", postHandler)

    fmt.Println("Server is starting on port 8080...")
    if err := http.ListenAndServe(":8080", nil); err != nil {
        fmt.Println("Error starting server:", err)
    }
}

package main

import (
    "fmt"
    "log"
    "net/http"
)

func errorHandler(w http.ResponseWriter, r *http.Request) {
    // 模拟一个错误
    err := fmt.Errorf("an error occurred")
    if err != nil {
        log.Println("Error:", err)
        http.Error(w, "Internal Server Error", http.StatusInternalServerError)
    }
}

func main() {
    http.HandleFunc("/error", errorHandler)

    fmt.Println("Server is starting on port 8080...")
    if err := http.ListenAndServe(":8080", nil); err != nil {
        log.Println("Error starting server:", err)
    }
}

package main

import (
    "fmt"
    "net/http"
)

func concurrentHandler(w http.ResponseWriter, r *http.Request) {
    // 模拟一个耗时操作
    for i := 0; i < 1000000000; i++ {
    }
    fmt.Fprintf(w, "Concurrent request processed.")
}

func main() {
    http.HandleFunc("/concurrent", concurrentHandler)

    fmt.Println("Server is starting on port 8080...")
    if err := http.ListenAndServe(":8080", nil); err != nil {
        fmt.Println("Error starting server:", err)
    }
}