Go言語によるWebサイトのアクセス速度の最適化戦略の検討と実践

package main

import (
    "bytes"
    "compress/gzip"
    "encoding/base64"
    "fmt"
    "io/ioutil"
    "net/http"
)

func main() {
    http.HandleFunc("/combine", combineHandler)
    http.ListenAndServe(":8080", nil)
}

func combineHandler(w http.ResponseWriter, r *http.Request) {
    var combinedFile bytes.Buffer

    // 读取CSS文件
    cssContent, err := ioutil.ReadFile("style.css")
    if err != nil {
        http.Error(w, "Error reading CSS file", http.StatusInternalServerError)
        return
    }

    // 读取JavaScript文件
    jsContent, err := ioutil.ReadFile("script.js")
    if err != nil {
        http.Error(w, "Error reading JavaScript file", http.StatusInternalServerError)
        return
    }

    // 合并CSS和JavaScript文件
    combinedFile.Write(cssContent)
    combinedFile.Write(jsContent)

    // Gzip压缩合并后的文件
    gzipBuffer := bytes.Buffer{}
    gzipWriter := gzip.NewWriter(&gzipBuffer)
    gzipWriter.Write(combinedFile.Bytes())
    gzipWriter.Close()

    // 将压缩后的文件进行Base64编码
    encodedContent := base64.StdEncoding.EncodeToString(gzipBuffer.Bytes())

    // 返回合并、压缩和编码后的文件给客户端
    w.Header().Set("Content-Encoding", "gzip")
    fmt.Fprintf(w, "<script src="data:text/javascript;base64,%s"></script>", encodedContent)
}

package main

import (
    "net/http"
    "time"
)

func main() {
    http.HandleFunc("/", imageHandler)
    http.ListenAndServe(":8080", nil)
}

func imageHandler(w http.ResponseWriter, r *http.Request) {
    http.ServeFile(w, r, "image.jpg")

    // 设置响应头的Cache-Control和Expires字段
    w.Header().Set("Cache-Control", "public, max-age=86400")
    w.Header().Set("Expires", time.Now().Add(time.Hour*24).Format(http.TimeFormat))
}

package main

import (
    "fmt"
    "net/http"
    "sync"
    "time"
)

func main() {
    http.HandleFunc("/", handler)
    http.ListenAndServe(":8080", nil)
}

func handler(w http.ResponseWriter, r *http.Request) {
    var wg sync.WaitGroup

    for i := 0; i < 10; i++ {
        wg.Add(1)
        go func() {
            defer wg.Done()
            // 执行一些耗时操作
            time.Sleep(time.Second)
            fmt.Fprintln(w, "Hello, World!")
        }()
    }

    wg.Wait()
}