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| package main
import (
"context"
"fmt"
"log"
"net"
"net/http"
"runtime"
"sync"
"time"
)
// 高性能HTTP服务器
type HighPerformanceServer struct {
server *http.Server
listener net.Listener
connPool sync.Pool
// 性能监控
activeConns int64
totalReqs int64
// 配置参数
maxConns int
readTimeout time.Duration
writeTimeout time.Duration
idleTimeout time.Duration
}
// 连接池中的连接包装器
type ConnWrapper struct {
net.Conn
server *HighPerformanceServer
}
func (c *ConnWrapper) Close() error {
// 连接复用逻辑
if c.server != nil {
atomic.AddInt64(&c.server.activeConns, -1)
}
return c.Conn.Close()
}
// 创建高性能服务器
func NewHighPerformanceServer(addr string) *HighPerformanceServer {
server := &HighPerformanceServer{
maxConns: 100000,
readTimeout: 30 * time.Second,
writeTimeout: 30 * time.Second,
idleTimeout: 120 * time.Second,
}
// 配置HTTP服务器
server.server = &http.Server{
Addr: addr,
ReadTimeout: server.readTimeout,
WriteTimeout: server.writeTimeout,
IdleTimeout: server.idleTimeout,
// 自定义连接状态回调
ConnState: server.onConnStateChange,
// 优化的处理器
Handler: server.createOptimizedHandler(),
}
// 初始化连接池
server.connPool = sync.Pool{
New: func() interface{} {
return make([]byte, 4096) // 4KB缓冲区
},
}
return server
}
// 连接状态变化回调
func (s *HighPerformanceServer) onConnStateChange(conn net.Conn, state http.ConnState) {
switch state {
case http.StateNew:
atomic.AddInt64(&s.activeConns, 1)
case http.StateClosed:
atomic.AddInt64(&s.activeConns, -1)
}
}
// 创建优化的处理器
func (s *HighPerformanceServer) createOptimizedHandler() http.Handler {
mux := http.NewServeMux()
// 高性能API端点
mux.HandleFunc("/api/fast", s.fastAPIHandler)
mux.HandleFunc("/api/stream", s.streamHandler)
mux.HandleFunc("/metrics", s.metricsHandler)
// 添加中间件
return s.withMiddleware(mux)
}
// 快速API处理器
func (s *HighPerformanceServer) fastAPIHandler(w http.ResponseWriter, r *http.Request) {
atomic.AddInt64(&s.totalReqs, 1)
// 从连接池获取缓冲区
buf := s.connPool.Get().([]byte)
defer s.connPool.Put(buf)
// 设置响应头
w.Header().Set("Content-Type", "application/json")
w.Header().Set("Cache-Control", "no-cache")
// 快速响应
response := `{"status":"ok","timestamp":` + fmt.Sprintf("%d", time.Now().Unix()) + `}`
w.Write([]byte(response))
}
// 流式处理器
func (s *HighPerformanceServer) streamHandler(w http.ResponseWriter, r *http.Request) {
// 设置流式响应
w.Header().Set("Content-Type", "text/plain")
w.Header().Set("Transfer-Encoding", "chunked")
flusher, ok := w.(http.Flusher)
if !ok {
http.Error(w, "Streaming unsupported", http.StatusInternalServerError)
return
}
// 流式发送数据
for i := 0; i < 10; i++ {
fmt.Fprintf(w, "chunk %d\n", i)
flusher.Flush()
time.Sleep(100 * time.Millisecond)
}
}
// 性能指标处理器
func (s *HighPerformanceServer) metricsHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
metrics := fmt.Sprintf(`{
"active_connections": %d,
"total_requests": %d,
"goroutines": %d,
"memory_mb": %d
}`,
atomic.LoadInt64(&s.activeConns),
atomic.LoadInt64(&s.totalReqs),
runtime.NumGoroutine(),
getMemUsage()/1024/1024,
)
w.Write([]byte(metrics))
}
// 中间件包装器
func (s *HighPerformanceServer) withMiddleware(handler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// 请求限流
if atomic.LoadInt64(&s.activeConns) > int64(s.maxConns) {
http.Error(w, "Too Many Requests", http.StatusTooManyRequests)
return
}
// 设置通用响应头
w.Header().Set("Server", "Go-HighPerf/1.0")
handler.ServeHTTP(w, r)
})
}
// 启动服务器
func (s *HighPerformanceServer) Start() error {
// 创建优化的监听器
listener, err := s.createOptimizedListener()
if err != nil {
return err
}
s.listener = listener
log.Printf("High performance server starting on %s", s.server.Addr)
return s.server.Serve(listener)
}
// 创建优化的监听器
func (s *HighPerformanceServer) createOptimizedListener() (net.Listener, error) {
// 解析地址
addr, err := net.ResolveTCPAddr("tcp", s.server.Addr)
if err != nil {
return nil, err
}
// 创建TCP监听器
listener, err := net.ListenTCP("tcp", addr)
if err != nil {
return nil, err
}
// 设置TCP参数
if tcpListener, ok := listener.(*net.TCPListener); ok {
// 启用地址复用
if file, err := tcpListener.File(); err == nil {
fd := int(file.Fd())
syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_REUSEPORT, 1)
file.Close()
}
}
return listener, nil
}
// 获取内存使用量
func getMemUsage() uint64 {
var m runtime.MemStats
runtime.ReadMemStats(&m)
return m.Alloc
}
// 优雅关闭
func (s *HighPerformanceServer) Shutdown(ctx context.Context) error {
return s.server.Shutdown(ctx)
}
|