http:服务器在Golang httptest中向HTTPS客户端提供HTTP响应

package main

import (
    "crypto/tls"
    "fmt"
    "io"
    "net/http"
    "net/http/httptest"
)

func main() {
    // 创建自签名的TLS证书
    cert, err := tls.X509KeyPair([]byte(certPEM), []byte(keyPEM))
    if err != nil {
        fmt.Println("Failed to load cert", err)
        return
    }

    // 创建服务器
    server := httptest.NewUnstartedServer(http.HandlerFunc(handler))

    // 配置TLS
    server.TLS = &tls.Config{
        Certificates: []tls.Certificate{cert},
    }

    // 启动服务器
    server.StartTLS()
    defer server.Close()

    // 创建HTTPS客户端
    client := server.Client()

    // 发送HTTP请求
    resp, err := client.Get(server.URL)
    if err != nil {
        fmt.Println("Failed to send request", err)
        return
    }
    defer resp.Body.Close()

    // 读取并打印响应内容
    body, err := io.ReadAll(resp.Body)
    if err != nil {
        fmt.Println("Failed to read response", err)
        return
    }
    fmt.Println("Response:", string(body))
}

// 处理HTTP请求的处理函数
func handler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprint(w, "Hello, World!")
}

// 示例的TLS证书和密钥
const certPEM = `-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`

const keyPEM = `-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----`