94 lines
3.3 KiB
Go
94 lines
3.3 KiB
Go
package server
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import (
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"net/http"
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"net/http/httputil"
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"net/url"
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"strings"
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)
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// srsProxyHandler 反向代理 SRS HTTP API（WHIP/WHEP 在 /rtc/v1/）。
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// 信令可反代，媒体由浏览器直连 SRS :8000。推流可按需校验服务端下发的 JWT。
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func (s *Server) srsProxyHandler() http.Handler {
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target, err := url.Parse(s.cfg.SRSBaseURL)
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if err != nil {
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target, _ = url.Parse("http://localhost:1985")
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}
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rp := httputil.NewSingleHostReverseProxy(target)
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if s.cfg.TokenRequired && strings.HasPrefix(r.URL.Path, "/rtc/v1/whip/") {
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room := r.URL.Query().Get("stream")
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tok := r.URL.Query().Get("token")
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claims, verr := verifyStreamToken(s.cfg.TokenSecret, tok)
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if verr != nil || claims.Room != room || claims.Role != "publish" {
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http.Error(w, "forbidden: valid publish token required", http.StatusForbidden)
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return
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}
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}
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rp.ServeHTTP(w, r)
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})
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}
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// srsHlsProxyHandler 反向代理 SRS http_server 的 HLS/FLV 静态资源（8080）。
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// 浏览器通过 Go 网关拉 HLS，避免直连 8080 的跨域和端口暴露问题。
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// 支持 /live/*.m3u8 /live/*.ts /live/*.flv
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func (s *Server) srsHlsProxyHandler() http.Handler {
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target, err := url.Parse(s.cfg.SRSHttpURL)
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if err != nil {
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target, _ = url.Parse("http://localhost:8080")
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}
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rp := httputil.NewSingleHostReverseProxy(target)
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origDirector := rp.Director
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rp.Director = func(r *http.Request) {
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origDirector(r)
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}
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("Access-Control-Allow-Methods", "GET, HEAD, OPTIONS")
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w.Header().Set("Access-Control-Allow-Headers", "*")
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if r.Method == http.MethodOptions {
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w.WriteHeader(http.StatusNoContent)
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return
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}
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rp.ServeHTTP(w, r)
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})
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}
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// cdnProxyHandler 占位代理第三方 CDN HLS。未配置时 502，便于前端感知与联调。
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func (s *Server) cdnProxyHandler() http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if s.cfg.CDNRTMPURL == "" {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusBadGateway)
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w.Write([]byte(`{"error":"cdn not configured: set CDN_RTMP_URL"}`))
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return
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}
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// 已配置但无实际 HLS 边缘时，返回 502 并附带 CDN 信息
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusBadGateway)
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w.Write([]byte(`{"error":"cdn hls not yet available: forward via RTMP not implemented"}`))
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})
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}
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// cfProxyHandler 反向代理 Cloudflare Realtime REST，注入 AppSecret。
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// 浏览器只交换 SDP（tracks/new），凭证不出服务端。
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func (s *Server) cfProxyHandler() http.Handler {
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base := strings.TrimRight(s.cfg.CFBaseURL, "/") + "/apps/" + s.cfg.CFAppID
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target, err := url.Parse(base)
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if err != nil {
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target, _ = url.Parse("https://rtc.live.cloudflare.com/v1/apps/" + s.cfg.CFAppID)
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}
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rp := httputil.NewSingleHostReverseProxy(target)
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rp.Director = func(r *http.Request) {
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rest := strings.TrimPrefix(r.URL.Path, "/api/cf")
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r.URL.Path = target.Path + rest
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r.URL.Scheme = target.Scheme
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r.URL.Host = target.Host
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r.Host = target.Host
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if s.cfg.CFAppSecret != "" {
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r.Header.Set("Authorization", "Bearer "+s.cfg.CFAppSecret)
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}
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}
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return rp
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}
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