mirror of
https://github.com/lkmio/lkm.git
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479 lines
12 KiB
Go
479 lines
12 KiB
Go
package main
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import (
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"encoding/json"
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"fmt"
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"github.com/gorilla/mux"
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"github.com/gorilla/websocket"
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"github.com/lkmio/avformat/utils"
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"github.com/lkmio/lkm/flv"
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"github.com/lkmio/lkm/gb28181"
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"github.com/lkmio/lkm/hls"
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"github.com/lkmio/lkm/log"
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"github.com/lkmio/lkm/rtc"
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"github.com/lkmio/lkm/stream"
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"io"
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"net"
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"net/http"
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"os"
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"runtime"
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"strings"
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"sync"
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"time"
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)
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type ApiServer struct {
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upgrader *websocket.Upgrader
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router *mux.Router
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}
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var apiServer *ApiServer
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func init() {
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apiServer = &ApiServer{
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upgrader: &websocket.Upgrader{
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CheckOrigin: func(r *http.Request) bool {
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return true
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},
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},
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router: mux.NewRouter(),
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}
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}
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func withCheckParams(f func(sourceId string, w http.ResponseWriter, req *http.Request), suffix string) func(http.ResponseWriter, *http.Request) {
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return func(w http.ResponseWriter, req *http.Request) {
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source, err := stream.Path2SourceId(req.URL.Path, suffix)
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if err != nil {
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httpResponse(w, http.StatusBadRequest, err.Error())
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return
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}
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f(source, w, req)
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}
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}
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func startApiServer(addr string) {
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/**
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http://host:port/xxx.flv
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http://host:port/xxx.rtc
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http://host:port/xxx.m3u8
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http://host:port/xxx_0.ts
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ws://host:port/xxx.flv
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*/
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//{source}.flv和/{source}/{stream}.flv意味着, 推流id(路径)只能一层
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apiServer.router.HandleFunc("/{source}.flv", withCheckParams(apiServer.onFlv, ".flv"))
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apiServer.router.HandleFunc("/{source}/{stream}.flv", withCheckParams(apiServer.onFlv, ".flv"))
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apiServer.router.HandleFunc("/{source}.m3u8", withCheckParams(apiServer.onHLS, ".m3u8"))
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apiServer.router.HandleFunc("/{source}/{stream}.m3u8", withCheckParams(apiServer.onHLS, ".m3u8"))
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apiServer.router.HandleFunc("/{source}.ts", withCheckParams(apiServer.onTS, ".ts"))
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apiServer.router.HandleFunc("/{source}/{stream}.ts", withCheckParams(apiServer.onTS, ".ts"))
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apiServer.router.HandleFunc("/{source}.rtc", withCheckParams(apiServer.onRtc, ".rtc"))
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apiServer.router.HandleFunc("/{source}/{stream}.rtc", withCheckParams(apiServer.onRtc, ".rtc"))
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apiServer.router.HandleFunc("/api/v1/gb28181/source/create", apiServer.createGBSource)
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//TCP主动,设置连接地址
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apiServer.router.HandleFunc("/api/v1/gb28181/source/connect", apiServer.connectGBSource)
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apiServer.router.HandleFunc("/api/v1/gb28181/source/close", apiServer.closeGBSource)
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apiServer.router.HandleFunc("/api/v1/gc/force", func(writer http.ResponseWriter, request *http.Request) {
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runtime.GC()
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writer.WriteHeader(http.StatusOK)
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})
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apiServer.router.HandleFunc("/rtc.html", func(writer http.ResponseWriter, request *http.Request) {
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http.ServeFile(writer, request, "./rtc.html")
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})
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http.Handle("/", apiServer.router)
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srv := &http.Server{
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Handler: apiServer.router,
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Addr: addr,
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// Good practice: enforce timeouts for servers you create!
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WriteTimeout: 30 * time.Second,
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ReadTimeout: 30 * time.Second,
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}
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err := srv.ListenAndServe()
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if err != nil {
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panic(err)
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}
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}
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func (api *ApiServer) createGBSource(w http.ResponseWriter, r *http.Request) {
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//请求参数
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v := &struct {
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Source string `json:"source"` //SourceId
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Setup string `json:"setup"` //active/passive
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SSRC uint32 `json:"ssrc,omitempty"`
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}{}
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//返回监听的端口
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response := &struct {
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IP string `json:"ip"`
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Port int `json:"port,omitempty"`
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}{}
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var err error
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defer func() {
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if err != nil {
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log.Sugar.Errorf(err.Error())
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httpResponse2(w, err)
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}
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}()
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if err = HttpDecodeJSONBody(w, r, v); err != nil {
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return
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}
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log.Sugar.Infof("gb create:%v", v)
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source := stream.SourceManager.Find(v.Source)
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if source != nil {
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err = &MalformedRequest{Code: http.StatusBadRequest, Msg: fmt.Sprintf("创建GB28181 Source失败 %s 已经存在", v.Source)}
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return
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}
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tcp := true
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var active bool
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if v.Setup == "passive" {
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} else if v.Setup == "active" {
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active = true
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} else {
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tcp = false
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//udp收流
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}
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if tcp && active {
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if !stream.AppConfig.GB28181.IsMultiPort() {
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err = &MalformedRequest{Code: http.StatusBadRequest, Msg: "创建GB28181 Source失败, 单端口模式下不能主动拉流"}
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} else if !tcp {
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err = &MalformedRequest{Code: http.StatusBadRequest, Msg: "创建GB28181 Source失败, UDP不能主动拉流"}
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} else if !stream.AppConfig.GB28181.IsEnableTCP() {
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err = &MalformedRequest{Code: http.StatusBadRequest, Msg: "创建GB28181 Source失败, 未开启TCP, UDP不能主动拉流"}
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}
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if err != nil {
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return
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}
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}
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_, port, err := gb28181.NewGBSource(v.Source, v.SSRC, tcp, active)
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if err != nil {
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err = &MalformedRequest{Code: http.StatusInternalServerError, Msg: fmt.Sprintf("创建GB28181 Source失败 err:%s", err.Error())}
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return
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}
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response.IP = stream.AppConfig.PublicIP
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response.Port = port
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httpResponseOk(w, response)
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}
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func (api *ApiServer) connectGBSource(w http.ResponseWriter, r *http.Request) {
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//请求参数
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v := &struct {
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Source string `json:"source"` //SourceId
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RemoteAddr string `json:"remote_addr"`
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}{}
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var err error
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defer func() {
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if err != nil {
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log.Sugar.Errorf(err.Error())
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httpResponse2(w, err)
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}
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}()
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if err = HttpDecodeJSONBody(w, r, v); err != nil {
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return
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}
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log.Sugar.Infof("gb connect:%v", v)
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source := stream.SourceManager.Find(v.Source)
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if source == nil {
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err = &MalformedRequest{Code: http.StatusBadRequest, Msg: "gb28181 source 不存在"}
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return
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}
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activeSource, ok := source.(*gb28181.ActiveSource)
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if !ok {
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err = &MalformedRequest{Code: http.StatusBadRequest, Msg: "gbsource 不能转为active source"}
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return
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}
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addr, err := net.ResolveTCPAddr("tcp", v.RemoteAddr)
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if err != nil {
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err = &MalformedRequest{Code: http.StatusBadRequest, Msg: "解析连接地址失败"}
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return
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}
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err = activeSource.Connect(addr)
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if err != nil {
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err = &MalformedRequest{Code: http.StatusBadRequest, Msg: fmt.Sprintf("连接Server失败 err:%s", err.Error())}
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return
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}
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httpResponseOk(w, nil)
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}
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func (api *ApiServer) closeGBSource(w http.ResponseWriter, r *http.Request) {
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//请求参数
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v := &struct {
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Source string `json:"source"` //SourceId
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}{}
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var err error
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defer func() {
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if err != nil {
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log.Sugar.Errorf(err.Error())
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httpResponse2(w, err)
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}
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}()
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if err = HttpDecodeJSONBody(w, r, v); err != nil {
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httpResponse2(w, err)
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return
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}
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log.Sugar.Infof("gb close:%v", v)
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source := stream.SourceManager.Find(v.Source)
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if source == nil {
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err = &MalformedRequest{Code: http.StatusBadRequest, Msg: "gb28181 source 不存在"}
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return
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}
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source.Close()
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httpResponseOk(w, nil)
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}
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func (api *ApiServer) generateSinkId(remoteAddr string) stream.SinkId {
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tcpAddr, err := net.ResolveTCPAddr("tcp", remoteAddr)
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if err != nil {
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panic(err)
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}
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return stream.GenerateSinkId(tcpAddr)
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}
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func (api *ApiServer) generateSourceId(remoteAddr string) stream.SinkId {
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tcpAddr, err := net.ResolveTCPAddr("tcp", remoteAddr)
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if err != nil {
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panic(err)
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}
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return stream.GenerateSinkId(tcpAddr)
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}
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func (api *ApiServer) onFlv(sourceId string, w http.ResponseWriter, r *http.Request) {
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ws := true
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if !("upgrade" == strings.ToLower(r.Header.Get("Connection"))) {
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ws = false
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} else if !("websocket" == strings.ToLower(r.Header.Get("Upgrade"))) {
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ws = false
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} else if !("13" == r.Header.Get("Sec-Websocket-Version")) {
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ws = false
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}
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if ws {
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apiServer.onWSFlv(sourceId, w, r)
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} else {
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apiServer.onHttpFLV(sourceId, w, r)
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}
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}
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func (api *ApiServer) onWSFlv(sourceId string, w http.ResponseWriter, r *http.Request) {
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conn, err := api.upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Sugar.Errorf("websocket头检查失败 err:%s", err.Error())
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w.WriteHeader(http.StatusBadRequest)
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return
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}
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sink := flv.NewFLVSink(api.generateSinkId(r.RemoteAddr), sourceId, flv.NewWSConn(conn))
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sink.SetUrlValues(r.URL.Query())
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log.Sugar.Infof("ws-flv 连接 sink:%s", sink.PrintInfo())
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_, state := stream.PreparePlaySink(sink)
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if utils.HookStateOK != state {
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log.Sugar.Warnf("ws-flv 播放失败 sink:%s", sink.PrintInfo())
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w.WriteHeader(http.StatusForbidden)
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return
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}
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netConn := conn.NetConn()
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bytes := make([]byte, 64)
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for {
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if _, err := netConn.Read(bytes); err != nil {
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log.Sugar.Infof("ws-flv 断开连接 sink:%s", sink.PrintInfo())
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sink.Close()
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break
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}
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}
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}
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func (api *ApiServer) onHttpFLV(sourceId string, w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "video/x-flv")
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w.Header().Set("Connection", "Keep-Alive")
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w.Header().Set("Transfer-Encoding", "chunked")
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hj, ok := w.(http.Hijacker)
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if !ok {
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http.Error(w, "webserver doesn't support hijacking", http.StatusInternalServerError)
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return
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}
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w.WriteHeader(http.StatusOK)
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conn, _, err := hj.Hijack()
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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sink := flv.NewFLVSink(api.generateSinkId(r.RemoteAddr), sourceId, conn)
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sink.SetUrlValues(r.URL.Query())
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log.Sugar.Infof("http-flv 连接 sink:%s", sink.PrintInfo())
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_, state := stream.PreparePlaySink(sink)
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if utils.HookStateOK != state {
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log.Sugar.Warnf("http-flv 播放失败 sink:%s", sink.PrintInfo())
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w.WriteHeader(http.StatusForbidden)
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return
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}
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bytes := make([]byte, 64)
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for {
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if _, err := conn.Read(bytes); err != nil {
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log.Sugar.Infof("http-flv 断开连接 sink:%s", sink.PrintInfo())
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sink.Close()
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break
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}
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}
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}
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func (api *ApiServer) onTS(source string, w http.ResponseWriter, r *http.Request) {
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if !stream.AppConfig.Hls.Enable {
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log.Sugar.Warnf("处理m3u8请求失败 server未开启hls request:%s", r.URL.Path)
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http.Error(w, "hls disable", http.StatusInternalServerError)
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return
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}
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index := strings.LastIndex(source, "_")
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if index < 0 || index == len(source)-1 {
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w.WriteHeader(http.StatusBadRequest)
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return
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}
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seq := source[index+1:]
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sourceId := source[:index]
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tsPath := stream.AppConfig.Hls.TSPath(sourceId, seq)
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if _, err := os.Stat(tsPath); err != nil {
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w.WriteHeader(http.StatusNotFound)
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return
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}
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//链路复用无法获取http断开回调
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//Hijack需要自行解析http
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http.ServeFile(w, r, tsPath)
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}
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func (api *ApiServer) onHLS(sourceId string, w http.ResponseWriter, r *http.Request) {
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if !stream.AppConfig.Hls.Enable {
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log.Sugar.Warnf("处理hls请求失败 server未开启hls")
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http.Error(w, "hls disable", http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/vnd.apple.mpegurl")
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//m3u8和ts会一直刷新, 每个请求只hook一次.
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sinkId := api.generateSinkId(r.RemoteAddr)
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//hook成功后, 如果还没有m3u8文件，等生成m3u8文件
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//后续直接返回当前m3u8文件
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if stream.SinkManager.Exist(sinkId) {
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http.ServeFile(w, r, stream.AppConfig.Hls.M3U8Path(sourceId))
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} else {
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context := r.Context()
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done := make(chan int, 0)
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sink := hls.NewM3U8Sink(sinkId, sourceId, func(m3u8 []byte) {
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w.Write(m3u8)
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done <- 0
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})
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sink.SetUrlValues(r.URL.Query())
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_, state := stream.PreparePlaySink(sink)
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if utils.HookStateOK != state {
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log.Sugar.Warnf("m3u8 请求失败 sink:%s", sink.PrintInfo())
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w.WriteHeader(http.StatusForbidden)
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return
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} else {
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err := stream.SinkManager.Add(sink)
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utils.Assert(err == nil)
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}
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select {
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case <-done:
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case <-context.Done():
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break
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}
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}
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}
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func (api *ApiServer) onRtc(sourceId string, w http.ResponseWriter, r *http.Request) {
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v := struct {
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Type string `json:"type"`
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SDP string `json:"sdp"`
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}{}
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data, err := io.ReadAll(r.Body)
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if err != nil {
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log.Sugar.Errorf("rtc请求错误 err:%s remote:%s", err.Error(), r.RemoteAddr)
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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} else if err := json.Unmarshal(data, &v); err != nil {
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log.Sugar.Errorf("rtc请求错误 err:%s remote:%s", err.Error(), r.RemoteAddr)
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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group := sync.WaitGroup{}
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group.Add(1)
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sink := rtc.NewSink(api.generateSinkId(r.RemoteAddr), sourceId, v.SDP, func(sdp string) {
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response := struct {
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Type string `json:"type"`
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SDP string `json:"sdp"`
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}{
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Type: "answer",
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SDP: sdp,
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}
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marshal, err := json.Marshal(response)
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if err != nil {
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panic(err)
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}
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w.Header().Set("Content-Type", "application/json")
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w.Write(marshal)
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group.Done()
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})
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sink.SetUrlValues(r.URL.Query())
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log.Sugar.Infof("rtc 请求 sink:%s sdp:%v", sink.PrintInfo(), v.SDP)
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_, state := stream.PreparePlaySink(sink)
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if utils.HookStateOK != state {
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log.Sugar.Warnf("rtc 播放失败 sink:%s", sink.PrintInfo())
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w.WriteHeader(http.StatusForbidden)
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group.Done()
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}
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group.Wait()
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}
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