package main

import "fmt"

// ServerConfig 定義服務(wù)器配置
type ServerConfig struct {
    Port    int
    Timeout int
}

// Option 定義函數(shù)選項(xiàng)類型
type Option func(*ServerConfig)

// WithPort 設(shè)置服務(wù)器端口
func WithPort(port int) Option {
    return func(cfg *ServerConfig) {
        cfg.Port = port
    }
}

// WithTimeout 設(shè)置超時(shí)時(shí)間
func WithTimeout(timeout int) Option {
    return func(cfg *ServerConfig) {
        cfg.Timeout = timeout
    }
}

// NewServer 創(chuàng)建一個(gè)新的服務(wù)器實(shí)例
func NewServer(options ...Option) *ServerConfig {
    cfg := &ServerConfig{
        Port:    8080,
        Timeout: 30,
    }
    for _, opt := range options {
        opt(cfg)
    }
    return cfg
}

func main() {
    // 創(chuàng)建服務(wù)器實(shí)例并指定選項(xiàng)
    server := NewServer(
        WithPort(9090),
        WithTimeout(60),
    )

    fmt.Printf("Server Port: %d, Timeout: %d\n", server.Port, server.Timeout)
}

package main

import "fmt"

// ServerConfig 定義服務(wù)器配置
type ServerConfig struct {
    Port    int
    Timeout int
}

// ServerOption 定義結(jié)構(gòu)體選項(xiàng)類型
type ServerOption struct {
    Port    int
    Timeout int
}

// NewServer 創(chuàng)建一個(gè)新的服務(wù)器實(shí)例
func NewServer(opts ...ServerOption) *ServerConfig {
    cfg := &ServerConfig{
        Port:    8080,
        Timeout: 30,
    }
    for _, opt := range opts {
        cfg.Port = opt.Port
        cfg.Timeout = opt.Timeout
    }
    return cfg
}

func main() {
    // 創(chuàng)建服務(wù)器實(shí)例并指定選項(xiàng)
    server := NewServer(
        ServerOption{Port: 9090, Timeout: 60},
    )

    fmt.Printf("Server Port: %d, Timeout: %d\n", server.Port, server.Timeout)
}

package main

import (
    "fmt"
    "net/http"
)

// ServerConfig 定義服務(wù)器配置
type ServerConfig struct {
    Port    int
    Timeout int
}

// ServerOption 定義結(jié)構(gòu)體選項(xiàng)類型
type ServerOption struct {
    Port    int
    Timeout int
}

// NewServer 創(chuàng)建一個(gè)新的服務(wù)器實(shí)例
func NewServer(opts ...ServerOption) *ServerConfig {
    cfg := &ServerConfig{
        Port:    8080,
        Timeout: 30,
    }
    for _, opt := range opts {
        cfg.Port = opt.Port
        cfg.Timeout = opt.Timeout
    }
    return cfg
}

// Start 啟動(dòng)HTTP服務(wù)器
func (cfg *ServerConfig) Start() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintf(w, "Hello, World!")
    })

    addr := fmt.Sprintf(":%d", cfg.Port)
    fmt.Printf("Server listening on %s\n", addr)
    http.ListenAndServe(addr, nil)
}

func main() {
    // 創(chuàng)建HTTP服務(wù)器實(shí)例并指定選項(xiàng)
    server := NewServer(
        ServerOption{Port: 9090, Timeout: 60},
    )

    server.Start()
}