78 lines
2.1 KiB
Go
78 lines
2.1 KiB
Go
package server
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import (
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"context"
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"encoding/json"
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"fmt"
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"github.com/golang/glog"
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"github.com/mayuresh82/gocast/controller"
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"net/http"
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)
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// Server is the main entrypoint into the app and serves app requests
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type Server struct {
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ListenAddr string
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mon *controller.MonitorMgr
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}
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func NewServer(addr string, mon *controller.MonitorMgr) *Server {
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return &Server{
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ListenAddr: addr,
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mon: mon,
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}
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}
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func (s *Server) Serve(ctx context.Context) {
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glog.Infof("Starting http server on %s", s.ListenAddr)
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http.HandleFunc("/register", s.registerHandler)
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http.HandleFunc("/unregister", s.unregisterHandler)
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http.HandleFunc("/info", s.infoHandler)
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srv := &http.Server{Addr: s.ListenAddr}
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idleConnsClosed := make(chan struct{})
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go func() {
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<-ctx.Done()
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if err := srv.Shutdown(context.Background()); err != nil {
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// Error from closing listeners, or context timeout:
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glog.Errorf("HTTP server Shutdown Error: %v", err)
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}
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close(idleConnsClosed)
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}()
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if err := srv.ListenAndServe(); err != http.ErrServerClosed {
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// Error starting or closing listener
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glog.Errorf("HTTP server ListenAndServe Error: %v", err)
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}
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<-idleConnsClosed
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}
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func (s *Server) registerHandler(w http.ResponseWriter, r *http.Request) {
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queries := r.URL.Query()
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app, err := controller.NewApp(queries["name"][0], queries["vip"][0], queries["monitor"], queries["nat"], "http")
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if err != nil {
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http.Error(w, fmt.Sprintf("Invalid request: %v", err), http.StatusBadRequest)
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return
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}
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s.mon.Add(app)
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}
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func (s *Server) unregisterHandler(w http.ResponseWriter, r *http.Request) {
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queries := r.URL.Query()
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appName, ok := queries["name"]
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if !ok {
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http.Error(w, "Invalid request, need app name specified", http.StatusBadRequest)
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return
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}
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s.mon.Lock()
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s.mon.Remove(appName[0])
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s.mon.Unlock()
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}
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func (s *Server) infoHandler(w http.ResponseWriter, r *http.Request) {
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peer, err := s.mon.GetInfo()
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if err != nil {
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http.Error(w, fmt.Sprintf("Internal error getting peers: %v", err), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(peer)
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}
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