package main import ( "encoding/json" "fmt" "io/ioutil" "net/http" log "github.com/Sirupsen/logrus" "github.com/elazarl/go-bindata-assetfs" "github.com/gorilla/mux" ) type WebProvider struct { Address string CertFile, KeyFile string } func (provider *WebProvider) Provide(configurationChan chan<- configMessage) error { systemRouter := mux.NewRouter() // health route systemRouter.Methods("GET").Path("/health").HandlerFunc(getHealthHandler) // API routes systemRouter.Methods("GET").Path("/api").HandlerFunc(getConfigHandler) systemRouter.Methods("GET").Path("/api/providers").HandlerFunc(getConfigHandler) systemRouter.Methods("GET").Path("/api/providers/{provider}").HandlerFunc(getProviderHandler) systemRouter.Methods("PUT").Path("/api/providers/{provider}").HandlerFunc(func(response http.ResponseWriter, request *http.Request) { vars := mux.Vars(request) if vars["provider"] != "web" { response.WriteHeader(http.StatusBadRequest) fmt.Fprintf(response, "Only 'web' provider can be updated through the REST API") return } configuration := new(Configuration) body, _ := ioutil.ReadAll(request.Body) err := json.Unmarshal(body, configuration) if err == nil { configurationChan <- configMessage{"web", configuration} getConfigHandler(response, request) } else { log.Errorf("Error parsing configuration %+v", err) http.Error(response, fmt.Sprintf("%+v", err), http.StatusBadRequest) } }) systemRouter.Methods("GET").Path("/api/providers/{provider}/backends").HandlerFunc(getBackendsHandler) systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}").HandlerFunc(getBackendHandler) systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}/servers").HandlerFunc(getServersHandler) systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}/servers/{server}").HandlerFunc(getServerHandler) systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends").HandlerFunc(getFrontendsHandler) systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}").HandlerFunc(getFrontendHandler) systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}/routes").HandlerFunc(getRoutesHandler) systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}/routes/{route}").HandlerFunc(getRouteHandler) // Expose dashboard systemRouter.Methods("GET").Path("/").HandlerFunc(func(response http.ResponseWriter, request *http.Request) { http.Redirect(response, request, "/dashboard/", 302) }) systemRouter.Methods("GET").PathPrefix("/dashboard/").Handler(http.StripPrefix("/dashboard/", http.FileServer(&assetfs.AssetFS{Asset: Asset, AssetDir: AssetDir, Prefix: "static"}))) go func() { if len(provider.CertFile) > 0 && len(provider.KeyFile) > 0 { err := http.ListenAndServeTLS(provider.Address, provider.CertFile, provider.KeyFile, systemRouter) if err != nil { log.Fatal("Error creating server: ", err) } } else { err := http.ListenAndServe(provider.Address, systemRouter) if err != nil { log.Fatal("Error creating server: ", err) } } }() return nil } func getHealthHandler(response http.ResponseWriter, request *http.Request) { templatesRenderer.JSON(response, http.StatusOK, metrics.Data()) } func getConfigHandler(response http.ResponseWriter, request *http.Request) { templatesRenderer.JSON(response, http.StatusOK, currentConfigurations) } func getProviderHandler(response http.ResponseWriter, request *http.Request) { vars := mux.Vars(request) providerID := vars["provider"] if provider, ok := currentConfigurations[providerID]; ok { templatesRenderer.JSON(response, http.StatusOK, provider) } else { http.NotFound(response, request) } } func getBackendsHandler(response http.ResponseWriter, request *http.Request) { vars := mux.Vars(request) providerID := vars["provider"] if provider, ok := currentConfigurations[providerID]; ok { templatesRenderer.JSON(response, http.StatusOK, provider.Backends) } else { http.NotFound(response, request) } } func getBackendHandler(response http.ResponseWriter, request *http.Request) { vars := mux.Vars(request) providerID := vars["provider"] backendID := vars["backend"] if provider, ok := currentConfigurations[providerID]; ok { if backend, ok := provider.Backends[backendID]; ok { templatesRenderer.JSON(response, http.StatusOK, backend) return } } http.NotFound(response, request) } func getServersHandler(response http.ResponseWriter, request *http.Request) { vars := mux.Vars(request) providerID := vars["provider"] backendID := vars["backend"] if provider, ok := currentConfigurations[providerID]; ok { if backend, ok := provider.Backends[backendID]; ok { templatesRenderer.JSON(response, http.StatusOK, backend.Servers) return } } http.NotFound(response, request) } func getServerHandler(response http.ResponseWriter, request *http.Request) { vars := mux.Vars(request) providerID := vars["provider"] backendID := vars["backend"] serverID := vars["server"] if provider, ok := currentConfigurations[providerID]; ok { if backend, ok := provider.Backends[backendID]; ok { if server, ok := backend.Servers[serverID]; ok { templatesRenderer.JSON(response, http.StatusOK, server) return } } } http.NotFound(response, request) } func getFrontendsHandler(response http.ResponseWriter, request *http.Request) { vars := mux.Vars(request) providerID := vars["provider"] if provider, ok := currentConfigurations[providerID]; ok { templatesRenderer.JSON(response, http.StatusOK, provider.Frontends) } else { http.NotFound(response, request) } } func getFrontendHandler(response http.ResponseWriter, request *http.Request) { vars := mux.Vars(request) providerID := vars["provider"] frontendID := vars["frontend"] if provider, ok := currentConfigurations[providerID]; ok { if frontend, ok := provider.Frontends[frontendID]; ok { templatesRenderer.JSON(response, http.StatusOK, frontend) return } } http.NotFound(response, request) } func getRoutesHandler(response http.ResponseWriter, request *http.Request) { vars := mux.Vars(request) providerID := vars["provider"] frontendID := vars["frontend"] if provider, ok := currentConfigurations[providerID]; ok { if frontend, ok := provider.Frontends[frontendID]; ok { templatesRenderer.JSON(response, http.StatusOK, frontend.Routes) return } } http.NotFound(response, request) } func getRouteHandler(response http.ResponseWriter, request *http.Request) { vars := mux.Vars(request) providerID := vars["provider"] frontendID := vars["frontend"] routeID := vars["route"] if provider, ok := currentConfigurations[providerID]; ok { if frontend, ok := provider.Frontends[frontendID]; ok { if route, ok := frontend.Routes[routeID]; ok { templatesRenderer.JSON(response, http.StatusOK, route) return } } } http.NotFound(response, request) }