mirror of
https://gitee.com/johng/gf.git
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501 lines
17 KiB
Go
501 lines
17 KiB
Go
// Copyright 2017 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://gitee.com/johng/gf.
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package ghttp
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import (
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"os"
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"sync"
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"errors"
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"strings"
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"reflect"
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"runtime"
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"net/http"
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"gitee.com/johng/gf/g/os/glog"
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"gitee.com/johng/gf/g/os/gproc"
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"gitee.com/johng/gf/g/os/gcache"
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"gitee.com/johng/gf/g/util/gconv"
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"gitee.com/johng/gf/g/container/gmap"
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"gitee.com/johng/gf/g/container/gtype"
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"gitee.com/johng/gf/g/container/gqueue"
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"gitee.com/johng/gf/g/os/gspath"
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"gitee.com/johng/gf/g/os/genv"
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"github.com/gorilla/websocket"
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"gitee.com/johng/gf/g/os/gtime"
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"time"
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"gitee.com/johng/gf/g/os/gfile"
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"gitee.com/johng/gf/g/util/gregex"
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"gitee.com/johng/gf/g/container/garray"
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"github.com/olekukonko/tablewriter"
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"bytes"
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"fmt"
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)
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const (
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SERVER_STATUS_STOPPED = 0 // Server状态:停止
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SERVER_STATUS_RUNNING = 1 // Server状态:运行
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HOOK_BEFORE_SERVE = "BeforeServe"
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HOOK_AFTER_SERVE = "AfterServe"
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HOOK_BEFORE_OUTPUT = "BeforeOutput"
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HOOK_AFTER_OUTPUT = "AfterOutput"
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HOOK_BEFORE_CLOSE = "BeforeClose"
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HOOK_AFTER_CLOSE = "AfterClose"
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)
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const (
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gHTTP_METHODS = "GET,PUT,POST,DELETE,PATCH,HEAD,CONNECT,OPTIONS,TRACE"
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gDEFAULT_SERVER = "default"
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gDEFAULT_DOMAIN = "default"
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gDEFAULT_METHOD = "ALL"
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gROUTE_REGISTER_HANDLER = 1
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gROUTE_REGISTER_OBJECT = 2
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gROUTE_REGISTER_CONTROLLER = 3
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)
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// ghttp.Server结构体
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type Server struct {
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// 基本属性变量
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name string // 服务名称,方便识别
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paths *gspath.SPath // 静态文件检索对象(类似nginx tryfile功能)
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config ServerConfig // 配置对象
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servers []*gracefulServer // 底层http.Server列表
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methodsMap map[string]struct{} // 所有支持的HTTP Method(初始化时自动填充)
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servedCount *gtype.Int // 已经服务的请求数(4-8字节,不考虑溢出情况),同时作为请求ID
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closeQueue *gqueue.Queue // 请求结束的关闭队列(存放的是需要异步关闭处理的*Request对象)
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// 服务注册相关
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serveTree map[string]interface{} // 所有注册的服务回调函数(路由表,树型结构,哈希表+链表优先级匹配)
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hooksTree map[string]interface{} // 所有注册的事件回调函数(路由表,树型结构,哈希表+链表优先级匹配)
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serveCache *gcache.Cache // 服务注册路由内存缓存
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hooksCache *gcache.Cache // 事件回调路由内存缓存
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routesMap map[string]registeredRouteItem // 已经注册的路由及对应的注册方法文件地址(用以路由重复注册判断)
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// 自定义状态码回调
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hsmu sync.RWMutex // status handler互斥锁
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statusHandlerMap map[string]HandlerFunc // 不同状态码下的注册处理方法(例如404状态时的处理方法)
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// SESSION
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sessions *gcache.Cache // Session内存缓存
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// Logger
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logger *glog.Logger // 日志管理对象
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}
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// 路由对象
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type Router struct {
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Uri string // 注册时的pattern - uri
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Method string // 注册时的pattern - method
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Domain string // 注册时的pattern - domain
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RegRule string // 路由规则解析后对应的正则表达式
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RegNames []string // 路由规则解析后对应的变量名称数组
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Priority int // 优先级,用于链表排序,值越大优先级越高
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}
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// pattern与回调函数的绑定map
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type handlerMap map[string]*handlerItem
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// http回调函数注册信息
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type handlerItem struct {
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name string // 注册的方法名称信息
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rtype int // 注册方式(执行对象/回调函数/控制器)
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ctype reflect.Type // 控制器类型(反射类型)
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fname string // 回调方法名称
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faddr HandlerFunc // 准确的执行方法内存地址(与以上两个参数二选一)
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finit HandlerFunc // 初始化请求回调方法(执行对象注册方式下有效)
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fshut HandlerFunc // 完成请求回调方法(执行对象注册方式下有效)
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router *Router // 注册时绑定的路由对象
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}
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// 根据特定URL.Path解析后的路由检索结果项
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type handlerParsedItem struct {
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handler *handlerItem // 路由注册项
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values map[string][]string // 特定URL.Path的Router解析参数
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}
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// 已注册的路由项
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type registeredRouteItem struct {
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file string // 文件路径及行数地址
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handler *handlerItem // 路由注册项
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}
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// HTTP注册函数
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type HandlerFunc func(r *Request)
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// 文件描述符map
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type listenerFdMap map[string]string
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// Server表,用以存储和检索名称与Server对象之间的关联关系
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var serverMapping = gmap.NewStringInterfaceMap()
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// 正常运行的Server数量,如果没有运行、失败或者全部退出,那么该值为0
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var serverRunning = gtype.NewInt()
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// Web Socket默认配置
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var wsUpgrader = websocket.Upgrader{}
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// Web Server已完成服务事件通道,当有事件时表示服务完成,当前进程退出
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var doneChan = make(chan struct{}, 1000)
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// 用于服务进程初始化,只能初始化一次,采用“懒初始化”(在server运行时才初始化)
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var serverProcInited = gtype.NewBool()
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// Web Server进程初始化.
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// 注意该方法不能放置于包初始化方法init中,不使用ghttp.Server的功能便不能初始化对应的协程goroutine逻辑.
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func serverProcInit() {
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if serverProcInited.Val() {
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return
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}
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serverProcInited.Set(true)
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// 如果是完整重启,那么需要等待主进程销毁后,才开始执行监听,防止端口冲突
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if genv.Get(gADMIN_ACTION_RESTART_ENVKEY) != "" {
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if p, e := os.FindProcess(gproc.PPid()); e == nil {
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p.Kill()
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p.Wait()
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} else {
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glog.Error(e)
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}
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}
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// 信号量管理操作监听
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go handleProcessSignal()
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// 异步监听进程间消息
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go handleProcessMessage()
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}
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// 获取/创建一个默认配置的HTTP Server(默认监听端口是80)
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// 单例模式,请保证name的唯一性
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func GetServer(name...interface{}) (*Server) {
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sname := gDEFAULT_SERVER
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if len(name) > 0 {
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sname = gconv.String(name[0])
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}
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if s := serverMapping.Get(sname); s != nil {
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return s.(*Server)
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}
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s := &Server {
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name : sname,
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paths : gspath.New(),
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servers : make([]*gracefulServer, 0),
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methodsMap : make(map[string]struct{}),
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statusHandlerMap : make(map[string]HandlerFunc),
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serveTree : make(map[string]interface{}),
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hooksTree : make(map[string]interface{}),
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serveCache : gcache.New(),
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hooksCache : gcache.New(),
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routesMap : make(map[string]registeredRouteItem),
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sessions : gcache.New(),
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servedCount : gtype.NewInt(),
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closeQueue : gqueue.New(),
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logger : glog.New(),
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}
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// 日志的标准输出默认关闭,但是错误信息会特殊处理
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s.logger.SetStdPrint(false)
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for _, v := range strings.Split(gHTTP_METHODS, ",") {
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s.methodsMap[v] = struct{}{}
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}
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// 初始化时使用默认配置
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s.SetConfig(defaultServerConfig)
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// 记录到全局ServerMap中
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serverMapping.Set(sname, s)
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return s
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}
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// 作为守护协程异步执行(当同一进程中存在多个Web Server时,需要采用这种方式执行)
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// 需要结合Wait方式一起使用
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func (s *Server) Start() error {
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// 服务进程初始化,只会初始化一次
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serverProcInit()
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// 当前Web Server状态判断
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if s.Status() == SERVER_STATUS_RUNNING {
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return errors.New("server is already running")
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}
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// 如果设置了静态文件目录,那么优先按照静态文件目录进行检索,其次是当前可执行文件工作目录;
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// 并且如果是开发环境,默认也会添加main包的源码目录路径做为二级检索。
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if s.config.ServerRoot != "" {
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s.paths.Set(s.config.ServerRoot)
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}
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s.paths.Add(gfile.SelfDir())
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if p := gfile.MainPkgPath(); gfile.Exists(p) {
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s.paths.Add(p)
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}
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// 底层http server配置
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if s.config.Handler == nil {
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s.config.Handler = http.HandlerFunc(s.defaultHttpHandle)
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}
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// 不允许访问的路由注册
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if s.config.DenyRoutes != nil {
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for _, v := range s.config.DenyRoutes {
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s.BindHookHandler(v, HOOK_BEFORE_SERVE, func(r *Request) {
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r.Response.WriteStatus(403)
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r.Exit()
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})
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}
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}
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// gzip压缩文件类型
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//if s.config.GzipContentTypes != nil {
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// for _, v := range s.config.GzipContentTypes {
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// s.gzipMimesMap[v] = struct{}{}
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// }
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//}
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// 启动http server
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reloaded := false
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fdMapStr := genv.Get(gADMIN_ACTION_RELOAD_ENVKEY)
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if len(fdMapStr) > 0 {
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sfm := bufferToServerFdMap([]byte(fdMapStr))
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if v, ok := sfm[s.name]; ok {
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s.startServer(v)
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reloaded = true
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}
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}
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if !reloaded {
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s.startServer(nil)
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}
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// 如果是子进程,那么服务开启后通知父进程销毁
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if gproc.IsChild() {
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gtime.SetTimeout(2*time.Second, func() {
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gproc.Send(gproc.PPid(), []byte("exit"), gADMIN_GPROC_COMM_GROUP)
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})
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}
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// 开启异步关闭队列处理循环
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s.startCloseQueueLoop()
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// 打印展示路由表
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s.DumpRoutesMap()
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return nil
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}
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// 打印展示路由表
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func (s *Server) DumpRoutesMap() {
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fmt.Println(s.GetRoutesMap())
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}
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// 获得路由表(格式化字符串)
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func (s *Server) GetRoutesMap() string {
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type tableItem struct {
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hook string
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domain string
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method string
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route string
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handler string
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}
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buf := bytes.NewBuffer(nil)
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table := tablewriter.NewWriter(buf)
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table.SetHeader([]string{"DOMAIN", "METHOD", "ROUTE", "HANDLER", "HOOK"})
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table.SetRowLine(true)
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table.SetBorder(false)
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table.SetCenterSeparator("|")
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m := make(map[string]*garray.SortedArray)
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for k, v := range s.routesMap {
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array, _ := gregex.MatchString(`(.*?)%([A-Z]+):(.+)@(.+)`, k)
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item := &tableItem{
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hook : array[1],
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domain : array[4],
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method : array[2],
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route : array[3],
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handler : v.handler.name,
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}
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if _, ok := m[item.domain]; !ok {
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m[item.domain] = garray.NewSortedArray(100, func(v1, v2 interface{}) int {
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item1 := v1.(*tableItem)
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item2 := v2.(*tableItem)
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r := 0
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if r = strings.Compare(item1.domain, item2.domain); r == 0 {
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if r = strings.Compare(item1.route, item2.route); r == 0 {
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if r = strings.Compare(item1.method, item2.method); r == 0 {
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r = strings.Compare(item1.hook, item2.hook)
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}
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}
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}
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return r
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}, false)
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}
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m[item.domain].Add(item)
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}
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for _, a := range m {
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s := make([]string, 5)
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for _, v := range a.Slice() {
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item := v.(*tableItem)
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s[0] = item.domain
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s[1] = item.method
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s[2] = item.route
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s[3] = item.handler
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s[4] = item.hook
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table.Append(s)
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}
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}
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table.Render()
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return buf.String()
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}
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// 阻塞执行监听
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func (s *Server) Run() error {
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if err := s.Start(); err != nil {
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return err
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}
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// 阻塞等待服务执行完成
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<- doneChan
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glog.Printfln("%d: all servers shutdown", gproc.Pid())
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return nil
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}
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// 阻塞等待所有Web Server停止,常用于多Web Server场景,以及需要将Web Server异步运行的场景
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// 这是一个与进程相关的方法
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func Wait() {
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// 阻塞等待服务执行完成
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<- doneChan
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glog.Printfln("%d: all servers shutdown", gproc.Pid())
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}
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// 开启底层Web Server执行
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func (s *Server) startServer(fdMap listenerFdMap) {
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var httpsEnabled bool
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if len(s.config.HTTPSCertPath) > 0 && len(s.config.HTTPSKeyPath) > 0 {
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// ================
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// HTTPS
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// ================
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if len(s.config.HTTPSAddr) == 0 {
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if len(s.config.Addr) > 0 {
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s.config.HTTPSAddr = s.config.Addr
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s.config.Addr = ""
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} else {
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s.config.HTTPSAddr = gDEFAULT_HTTPS_ADDR
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}
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}
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httpsEnabled = len(s.config.HTTPSAddr) > 0
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var array []string
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if v, ok := fdMap["https"]; ok && len(v) > 0 {
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array = strings.Split(v, ",")
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} else {
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array = strings.Split(s.config.HTTPSAddr, ",")
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}
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for _, v := range array {
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if len(v) == 0 {
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continue
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}
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fd := 0
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addr := v
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array := strings.Split(v, "#")
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if len(array) > 1 {
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addr = array[0]
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// windows系统不支持文件描述符传递socket通信平滑交接,因此只能完整重启
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if runtime.GOOS != "windows" {
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fd = gconv.Int(array[1])
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}
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}
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if fd > 0 {
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s.servers = append(s.servers, s.newGracefulServer(addr, fd))
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} else {
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s.servers = append(s.servers, s.newGracefulServer(addr))
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}
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s.servers[len(s.servers) - 1].isHttps = true
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}
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}
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// ================
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// HTTP
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// ================
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// 当HTTPS服务未启用时,默认HTTP地址才会生效
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if !httpsEnabled && len(s.config.Addr) == 0 {
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s.config.Addr = gDEFAULT_HTTP_ADDR
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}
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var array []string
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if v, ok := fdMap["http"]; ok && len(v) > 0 {
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array = strings.Split(v, ",")
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} else {
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array = strings.Split(s.config.Addr, ",")
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}
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for _, v := range array {
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if len(v) == 0 {
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continue
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}
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fd := 0
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addr := v
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array := strings.Split(v, "#")
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if len(array) > 1 {
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addr = array[0]
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// windows系统不支持文件描述符传递socket通信平滑交接,因此只能完整重启
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if runtime.GOOS != "windows" {
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fd = gconv.Int(array[1])
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}
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}
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if fd > 0 {
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s.servers = append(s.servers, s.newGracefulServer(addr, fd))
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} else {
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s.servers = append(s.servers, s.newGracefulServer(addr))
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}
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}
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// 开始执行异步监听
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for _, v := range s.servers {
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go func(server *gracefulServer) {
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serverRunning.Add(1)
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err := (error)(nil)
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if server.isHttps {
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err = server.ListenAndServeTLS(s.config.HTTPSCertPath, s.config.HTTPSKeyPath)
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} else {
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||
err = server.ListenAndServe()
|
||
}
|
||
serverRunning.Add(-1)
|
||
// 如果非关闭错误,那么提示报错,否则认为是正常的服务关闭操作
|
||
if err != nil && !strings.EqualFold(http.ErrServerClosed.Error(), err.Error()) {
|
||
glog.Error(err)
|
||
}
|
||
// 如果所有异步的Server都已经停止,并且没有在管理操作(重启/关闭)进行中,那么主Server就可以退出了
|
||
if serverRunning.Val() < 1 && serverProcessStatus.Val() == 0 {
|
||
doneChan <- struct{}{}
|
||
}
|
||
}(v)
|
||
}
|
||
}
|
||
|
||
// 获取当前服务器的状态
|
||
func (s *Server) Status() int {
|
||
// 当全局运行的Web Server数量为0时表示所有Server都是停止状态
|
||
if serverRunning.Val() == 0 {
|
||
return SERVER_STATUS_STOPPED
|
||
}
|
||
// 只要有一个Server处于运行状态,那么都表示运行状态
|
||
for _, v := range s.servers {
|
||
if v.status == SERVER_STATUS_RUNNING {
|
||
return SERVER_STATUS_RUNNING
|
||
}
|
||
}
|
||
return SERVER_STATUS_STOPPED
|
||
}
|
||
|
||
// 获取当前监听的文件描述符信息,构造成map返回
|
||
func (s *Server) getListenerFdMap() map[string]string {
|
||
m := map[string]string {
|
||
"https" : "",
|
||
"http" : "",
|
||
}
|
||
// s.servers是从HTTPS到HTTP优先级遍历,解析的时候也应当按照这个顺序读取fd
|
||
for _, v := range s.servers {
|
||
str := v.addr + "#" + gconv.String(v.Fd()) + ","
|
||
if v.isHttps {
|
||
m["https"] += str
|
||
} else {
|
||
m["http"] += str
|
||
}
|
||
}
|
||
// 去掉末尾的","号
|
||
if len(m["https"]) > 0 {
|
||
m["https"] = m["https"][0 : len(m["https"]) - 1]
|
||
}
|
||
if len(m["http"]) > 0 {
|
||
m["http"] = m["http"][0 : len(m["http"]) - 1]
|
||
}
|
||
|
||
return m
|
||
}
|