gf/g/net/ghttp/http_server.go

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// Copyright 2017 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://gitee.com/johng/gf.
package ghttp
import (
"sync"
"errors"
"strings"
"reflect"
"net/http"
"gitee.com/johng/gf/g/os/glog"
"gitee.com/johng/gf/g/os/gcache"
"gitee.com/johng/gf/g/container/gmap"
"gitee.com/johng/gf/g/container/gtype"
"gitee.com/johng/gf/g/container/gqueue"
)
const (
gHTTP_METHODS = "GET,PUT,POST,DELETE,PATCH,HEAD,CONNECT,OPTIONS,TRACE"
gDEFAULT_SERVER = "default"
gDEFAULT_DOMAIN = "default"
gDEFAULT_METHOD = "ALL"
gDEFAULT_COOKIE_PATH = "/" // 默认path
gDEFAULT_COOKIE_MAX_AGE = 86400*365 // 默认cookie有效期(一年)
gDEFAULT_SESSION_MAX_AGE = 600 // 默认session有效期(600秒)
gDEFAULT_SESSION_ID_NAME = "gfsessionid" // 默认存放Cookie中的SessionId名称
)
// http server结构体
type Server struct {
hmmu sync.RWMutex // handler互斥锁
hhmu sync.RWMutex // hooks互斥锁
hmcmu sync.RWMutex // handlerCache互斥锁
hhcmu sync.RWMutex // hooksCache互斥锁
name string // 服务名称,方便识别
server http.Server // 底层http server对象
config ServerConfig // 配置对象
status int8 // 当前服务器状态(0未启动1运行中)
methodsMap map[string]bool // 所有支持的HTTP Method(初始化时自动填充)
handlerMap HandlerMap // 所有注册的回调函数(静态匹配)
handlerTree map[string]interface{} // 所有注册的回调函数(动态匹配,树型+链表优先级匹配)
hooksTree map[string]interface{} // 所有注册的事件回调函数(动态匹配,树型+链表优先级匹配)
handlerCache *gcache.Cache // 服务注册路由内存缓存
hooksCache *gcache.Cache // 回调事件注册路由内存缓存
servedCount *gtype.Int // 已经服务的请求数(4-8字节不考虑溢出情况)
cookieMaxAge *gtype.Int // Cookie有效期
sessionMaxAge *gtype.Int // Session有效期
sessionIdName *gtype.String // SessionId名称
cookies *gmap.IntInterfaceMap // 当前服务器正在服务(请求正在执行)的Cookie(每个请求一个Cookie对象)
sessions *gcache.Cache // Session内存缓存
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)
}
// 域名、URI与回调函数的绑定记录表
type HandlerMap map[string]*HandlerItem
// http回调函数注册信息
type HandlerItem struct {
ctype reflect.Type // 控制器类型
fname string // 回调方法名称
faddr HandlerFunc // 准确的执行方法内存地址(与以上两个参数二选一)
uri string // 注册时的pattern - uri
method string // 注册时的pattern - method
domain string // 注册时的pattern - domain
priority int // 优先级,用于链表排序,值越大优先级越高
}
// http注册函数
type HandlerFunc func(*Request)
// Server表用以存储和检索名称与Server对象之间的关联关系
var serverMapping = gmap.NewStringInterfaceMap()
// 获取/创建一个默认配置的HTTP Server(默认监听端口是80)
// 单例模式请保证name的唯一性
func GetServer(names...string) (*Server) {
name := gDEFAULT_SERVER
if len(names) > 0 {
name = names[0]
}
if s := serverMapping.Get(name); s != nil {
return s.(*Server)
}
s := &Server {
name : name,
methodsMap : make(map[string]bool),
handlerMap : make(HandlerMap),
handlerTree : make(map[string]interface{}),
hooksTree : make(map[string]interface{}),
handlerCache : gcache.New(),
hooksCache : gcache.New(),
cookies : gmap.NewIntInterfaceMap(),
sessions : gcache.New(),
cookieMaxAge : gtype.NewInt(gDEFAULT_COOKIE_MAX_AGE),
sessionMaxAge : gtype.NewInt(gDEFAULT_SESSION_MAX_AGE),
sessionIdName : gtype.NewString(gDEFAULT_SESSION_ID_NAME),
servedCount : gtype.NewInt(),
closeQueue : gqueue.New(),
}
s.hooksCache.SetCap(10000)
s.handlerCache.SetCap(10000)
for _, v := range strings.Split(gHTTP_METHODS, ",") {
s.methodsMap[v] = true
}
s.SetConfig(defaultServerConfig)
serverMapping.Set(name, s)
return s
}
// 阻塞执行监听
func (s *Server) Run() error {
if s.status == 1 {
return errors.New("server is already running")
}
// 底层http server配置
if s.config.Handler == nil {
s.config.Handler = http.HandlerFunc(s.defaultHttpHandle)
}
// 底层http server初始化
s.server = http.Server {
Addr : s.config.Addr,
Handler : s.config.Handler,
ReadTimeout : s.config.ReadTimeout,
WriteTimeout : s.config.WriteTimeout,
IdleTimeout : s.config.IdleTimeout,
MaxHeaderBytes : s.config.MaxHeaderBytes,
}
// 开启异步处理队列处理循环
s.startCloseQueueLoop()
// 执行端口监听
if err := s.server.ListenAndServe(); err != nil {
glog.Error(err)
return err
}
s.status = 1
return nil
}
// 清空当前的handlerCache
func (s *Server) clearHandlerCache() {
// 只有在运行时才会生效
if s.status != 1 {
return
}
s.hmcmu.Lock()
defer s.hmcmu.Unlock()
s.handlerCache.Close()
s.handlerCache = gcache.New()
}
// 清空当前的hooksCache
func (s *Server) clearHooksCache() {
// 只有在运行时才会生效
if s.status != 1 {
return
}
s.hhcmu.Lock()
defer s.hhcmu.Unlock()
s.hooksCache.Close()
s.hooksCache = gcache.New()
}