print api endpoints

app/web-apiv1.go

@@ -25,15 +25,23 @@
 package main
 
 import (
-	"fmt"
+	"encoding/json"
 	"net/http"
 
 	"github.com/gorilla/mux"
 )
 
+type webAPIv1Endpoint struct {
+	Methods []string `json:"allowed-methods"`
+}
+
+var (
+	webAPIv1Endpoints = make(map[string]*webAPIv1Endpoint)
+)
+
 func webAPIv1_Index(w http.ResponseWriter, r *http.Request) {
-	fmt.Fprintf(w, "welcome to /api/v1")
-	// TODO: print endpioint listing
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(webAPIv1Endpoints)
 }
 
 func webAPIv1_Groups_List(w http.ResponseWriter, r *http.Request) {
@@ -85,11 +93,11 @@ func webAPIv1__methodNotAllowed(w http.ResponseWriter, r *http.Request) {
 }
 
 func webAPIv1InstallHandler(r *mux.Router) {
-	r.HandleFunc("", webAPIv1_Index)
-	r.HandleFunc("/", webAPIv1_Index)
-
-	r.HandleFunc("/groups", webAPIv1_Groups_List)
+	// Groups
+	r.HandleFunc("/groups", webAPIv1_Groups_List).Methods("GET")
+	r.HandleFunc("/groups", webAPIv1__methodNotAllowed)
 
+	// Playlists
 	r.HandleFunc("/groups/{group-id}/playlists", webAPIv1_PlaylistsOfGroup_List).Methods("GET")
 	r.HandleFunc("/groups/{group-id}/playlists", webAPIv1_PlaylistsOfGroup_Create).Methods("POST")
 	r.HandleFunc("/groups/{group-id}/playlists", webAPIv1__methodNotAllowed)
@@ -98,11 +106,35 @@ func webAPIv1InstallHandler(r *mux.Router) {
 	r.HandleFunc("/groups/{group-id}/playlists/{playlist-id}", webAPIv1_PlaylistsOfGroup_Delete).Methods("DELETE")
 	r.HandleFunc("/groups/{group-id}/playlists/{playlist-id}", webAPIv1__methodNotAllowed)
 
+	// Files
 	r.HandleFunc("/groups/{group-id}/files", webAPIv1_FilesOfGroup_List).Methods("GET")
 	r.HandleFunc("/groups/{group-id}/files", webAPIv1_FilesOfGroup_Create).Methods("POST")
 	r.HandleFunc("/groups/{group-id}/files", webAPIv1__methodNotAllowed)
+
 	r.HandleFunc("/groups/{group-id}/files/{file-id}", webAPIv1_FilesOfGroup_Read).Methods("GET")
 	r.HandleFunc("/groups/{group-id}/files/{file-id}", webAPIv1_FilesOfGroup_Update).Methods("PUT")
 	r.HandleFunc("/groups/{group-id}/files/{file-id}", webAPIv1_FilesOfGroup_Delete).Methods("DELETE")
 	r.HandleFunc("/groups/{group-id}/files/{file-id}", webAPIv1__methodNotAllowed)
+
+	// Index
+	r.HandleFunc("/", webAPIv1_Index).Methods("GET")
+	r.HandleFunc("/", webAPIv1__methodNotAllowed)
+	r.Walk(func(route *mux.Route, router *mux.Router, ancestors []*mux.Route) error {
+		p, err := route.GetPathTemplate()
+		if err != nil {
+			return nil
+		}
+
+		m, err := route.GetMethods()
+		if err != nil || len(m) == 0 {
+			return err
+		}
+
+		if e, exists := webAPIv1Endpoints[p]; exists {
+			e.Methods = append(e.Methods, m...)
+		} else {
+			webAPIv1Endpoints[p] = &webAPIv1Endpoint{m}
+		}
+		return nil
+	})
 }

app/web.go

@@ -36,7 +36,7 @@ import (
 
 const (
 	WebUIPathPrefix = "/ui/"
-	WebAPIv1Prefix  = "/api/v1"
+	WebAPIv1Prefix  = "/api/v1/"
 )
 
 func runWeb(ln net.Listener) error {