/
server.go
382 lines (333 loc) · 7.85 KB
/
server.go
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package fastserver
import (
"flag"
"fmt"
"github.com/valyala/fasthttp"
"github.com/valyala/fasthttp/prefork"
"github.com/valyala/fasthttp/reuseport"
"github.com/xfyun/xns/tools/str"
"log"
"net"
"os"
"os/exec"
"os/signal"
"path"
"runtime"
"runtime/debug"
"strconv"
"sync"
"sync/atomic"
"syscall"
"time"
)
type Message struct {
Code int `json:"code"`
Message string `json:"message"`
}
var stringOf = str.StringOf
func (c HandlersChain) Last() Handler {
if length := len(c); length > 0 {
return c[length-1]
}
return nil
}
// http server
// 基于fastHttp 封装路由功能
// 路由部分参考gin 的路由树,支持path 参数
type Server struct {
RouterGroup //
closed bool
stopWg sync.WaitGroup // 用于优雅启动停止时,等待所有的请求处理完毕时再退出
notFoundHandler HandlersChain // 找不到路由时默认执行的路由
file *os.File
currency int64
}
func (s *Server) stopWgCounter(ctx *Context) {
s.stopWg.Add(1)
atomic.AddInt64(&s.currency,1)
ctx.Next()
s.stopWg.Done()
atomic.AddInt64(&s.currency,-1)
}
func (s *Server)Currency()int64{
return atomic.LoadInt64(&s.currency)
}
func NewServer() *Server {
s := &Server{
RouterGroup: RouterGroup{
path: "",
handlers: nil,
routerTree: &routerTree{},
},
}
//fmt.Println(logo3)
s.routerTree.server = s
//每次接受到一个请求,wg +1 ,处理完一个请求,wg -1
s.Use(s.stopWgCounter)
return s
}
func (r *Server) NotFound(handler Handler) {
r.notFoundHandler = combineHandlers(r.handlers, handler)
}
func (s *Server) request() func(ctx *fasthttp.RequestCtx) {
return func(ctx *fasthttp.RequestCtx) {
c := newContext()
c.FastCtx = ctx
c.Path = stringOf(ctx.Path())
c.Method = stringOf(ctx.Method())
c.handlers = nil
c.RequestURI = stringOf(ctx.RequestURI())
s.routerTree.handleHTTPRequest(c)
c.free()
}
}
func (s *Server) RunFork(addr string, resuport bool) error {
sv := &fasthttp.Server{
Handler: s.request(),
}
pf := prefork.New(sv)
pf.Reuseport = resuport
return pf.ListenAndServe(addr)
}
func getMaxProcs()int{
num ,_ := strconv.Atoi(os.Getenv("NS_GOMAXPROC"))
if num > 0{
return num
}
return runtime.NumCPU()
}
func (s *Server) Run(addr string,reusepor bool)(err error ){
if !reusepor{
runtime.GOMAXPROCS(getMaxProcs())
}
var ls net.Listener
if reusepor{
ls ,err =reuseport.Listen("tcp4",addr)
}else{
ls, err = net.Listen("tcp", addr)
}
if err != nil {
return err
}
return s.run(ls)
}
func (s *Server) run(ls net.Listener) error {
// listen
go func() {
if err := fasthttp.Serve(ls, s.request()); err != nil {
if s.closed { // 正常关闭直接return
return
} else {
panic(err) // 否则panic
}
}
}()
//监听退出信号
sigChan := make(chan os.Signal, 1)
signal.Notify(sigChan, syscall.SIGSTOP, syscall.SIGQUIT, syscall.SIGTERM, syscall.SIGINT)
sig := <-sigChan
fmt.Printf("server receive signal:%v ,close listener and start to stop,%v\n", sig, time.Now().String())
s.closed = true
// 获取到退出信号时,关闭listener,不再接受新的请求,并且等待所有的请求处理完毕后退出
ls.Close()
s.stopWg.Wait()
fmt.Printf("server successful stoped %v \n", time.Now().String())
return nil
}
// 开启多进程
const (
profkFlags = "-forked-child-process"
child = "child"
)
var (
forkFlagVal = ""
)
func init() {
flag.StringVar(&forkFlagVal, profkFlags[1:], "", "")
}
func (s *Server) runChild() (cmd *exec.Cmd, err error) {
cmd = exec.Command(os.Args[0], append(os.Args[1:], profkFlags, child)...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.ExtraFiles = []*os.File{s.file}
err = cmd.Start()
if err != nil {
return
}
return
}
func isChild() bool {
if forkFlagVal == child {
return true
}
return false
}
func (s *Server) listenChild() error {
ls, err := net.FileListener(os.NewFile(3, ""))
if err != nil {
return err
}
return s.run(ls)
}
func (s *Server) listenTcpFiles(addr string) error {
raddr, err := net.ResolveTCPAddr("tcp", addr)
if err != nil {
return err
}
ls, err := net.ListenTCP("tcp", raddr)
if err != nil {
return err
}
f, err := ls.File()
if err != nil {
return err
}
s.file = f
return nil
}
type process struct {
err error
pid int
}
func getWorkerProcessesNum()int{
num ,_ := strconv.Atoi(os.Getenv("NS_WORKER_PROCESSES"))
if num > 0 && num < 128{
return num
}
return runtime.NumCPU()
}
// 启动子进程进行服务
func (s *Server) forkChildren()error {
processNum := getWorkerProcessesNum()
stopChan := make(chan process,processNum)
childMap := sync.Map{}
for i := 0; i < processNum; i++ {
cmd,err := s.runChild()
if err != nil{
return err
}
go func() {
stopChan <- process{
err: cmd.Wait(),
pid: cmd.Process.Pid,
}
}()
childMap.Store(cmd.Process.Pid,cmd)
}
var re error
for i:=0 ;i< processNum;i++{
p := <- stopChan
log.Println("child process done,err:",p.err,"pid",p.pid)
childMap.Delete(p.pid)
cmd,err := s.runChild()
re = err
if err != nil{
return err
}
go func() {
stopChan <- process{
err: cmd.Wait(),
pid: cmd.Process.Pid,
}
}()
childMap.Store(cmd.Process.Pid,cmd)
}
return re
}
func (s *Server) RunPFork(addr string,reusePort bool) error {
flag.Parse()
if isChild() {
runtime.GOMAXPROCS(1)
if reusePort{
ls,err := reuseport.Listen("tcp4",addr)
if err != nil{
return err
}
return s.run(ls)
}
return s.listenChild()
}
if !reusePort{
err := s.listenTcpFiles(addr)
if err != nil {
return err
}
}
return s.forkChildren()
}
type Handler func(ctx *Context)
type HandlersChain []Handler
type RouterGroup struct {
path string
handlers []Handler
routerTree *routerTree
}
// 添加拦截器(handlers)
func (r *RouterGroup) Use(handlers ...Handler) {
r.handlers = append(r.handlers, handlers...)
}
func (r *RouterGroup) Method(method string, pth string, handler Handler) {
pth = path.Join(r.path, pth)
r.routerTree.addRoute(method, pth, combineHandlers(r.handlers, handler))
}
//
func (r *RouterGroup) GET(path string, handler Handler) {
r.Method("GET", path, handler)
}
func (r *RouterGroup) POST(path string, handler Handler) {
r.Method("POST", path, handler)
}
func (r *RouterGroup) PUT(path string, handler Handler) {
r.Method("PUT", path, handler)
}
func (r *RouterGroup) DELETE(path string, handler Handler) {
r.Method("DELETE", path, handler)
}
func (r *RouterGroup) PATCH(path string, handler Handler) {
r.Method("PATCH", path, handler)
}
func (r *RouterGroup) HEAD(path string, handler Handler) {
r.Method("HEAD", path, handler)
}
func (r *RouterGroup) OPTION(path string, handler Handler) {
r.Method("OPTION", path, handler)
}
func (r *RouterGroup) RegisterApis(apis []*Api) *ApiGroup {
return NewApiGroup(r, apis)
}
func (r *RouterGroup) Any(path string, handler Handler) {
r.GET(path, handler)
r.POST(path, handler)
r.PATCH(path, handler)
r.DELETE(path, handler)
r.PUT(path, handler)
r.HEAD(path, handler)
r.OPTION(path, handler)
}
//创建一个group,可以构建新的拦截器链路,新的group 会继承父拦截器(handler)
func (r *RouterGroup) Group(pth string) *RouterGroup {
g := &RouterGroup{
path: path.Join(r.path, pth),
handlers: combineHandlers(r.handlers), // 这个地方需要复制一份,否则会出现不同的group handler 相互覆盖的情况
routerTree: r.routerTree,
}
return g
}
//recover handler
// 兜底,防止业务逻辑出现panic导致服务直接不可用
func DefaultRecover(c *Context) {
defer func() {
if err := recover(); err != nil {
stack := debug.Stack()
fmt.Fprintf(os.Stdout, "panic: err:%v stack:%s", err, stringOf(stack))
server500(c)
return
}
}()
c.Next()
}
func combineHandlers(hs HandlersChain, handler ...Handler) HandlersChain {
targets := make(HandlersChain, len(hs), len(hs)+len(handler))
copy(targets, hs)
return append(targets, handler...)
}