Simplify the setup of bundled assets (#436)

1. Move the generated file to handlers - it better belongs there
2. Ensure that all file serves are also handled by the asset store

Co-authored-by: Marcos Lilljedahl <marcosnils@gmail.com>

handlers/bootstrap.go

@@ -31,6 +31,9 @@ import (
 	"google.golang.org/api/people/v1"
 )
 
+//go:generate go run github.com/jteeuwen/go-bindata/go-bindata -pkg handlers -o gen_bindata.go -prefix ../www/ ../www/...
+//go:generate gofmt -w -s gen_bindata.go
+
 var core pwd.PWDApi
 var e event.EventApi
 var landings = map[string][]byte{}
@@ -85,19 +88,21 @@ func Register(extend HandlerExtender) {
 	corsRouter.HandleFunc("/sessions/{sessionId}/instances/{instanceName}/file", file).Methods("GET")
 
 	r.HandleFunc("/sessions/{sessionId}/instances/{instanceName}/editor", func(rw http.ResponseWriter, r *http.Request) {
-		http.ServeFile(rw, r, "www/editor.html")
+		serveAsset(rw, "editor.html")
 	})
 
 	r.HandleFunc("/ooc", func(rw http.ResponseWriter, r *http.Request) {
-		http.ServeFile(rw, r, "./www/ooc.html")
+		serveAsset(rw, "occ.html")
 	}).Methods("GET")
 	r.HandleFunc("/503", func(rw http.ResponseWriter, r *http.Request) {
-		http.ServeFile(rw, r, "./www/503.html")
+		serveAsset(rw, "503.html")
 	}).Methods("GET")
 	r.HandleFunc("/p/{sessionId}", Home).Methods("GET")
-	r.PathPrefix("/assets").Handler(http.FileServer(http.Dir("./www")))
+	r.PathPrefix("/assets").HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+		serveAsset(rw, r.URL.Path[1:])
+	})
 	r.HandleFunc("/robots.txt", func(rw http.ResponseWriter, r *http.Request) {
-		http.ServeFile(rw, r, "www/robots.txt")
+		serveAsset(rw, "robots.txt")
 	})
 
 	corsRouter.HandleFunc("/sessions/{sessionId}/ws/", WSH)
@@ -187,6 +192,15 @@ func Register(extend HandlerExtender) {
 	}
 }
 
+func serveAsset(w http.ResponseWriter, name string) {
+	a, err := Asset(name)
+	if err != nil {
+		w.WriteHeader(http.StatusNotFound)
+		return
+	}
+	w.Write(a)
+}
+
 func initPlaygrounds() {
 	pgs, err := core.PlaygroundList()
 	if err != nil {
@@ -205,7 +219,7 @@ func initAssets(p *types.Playground) {
 	}
 
 	lpath := path.Join(p.AssetsDir, "landing.html")
-	landing, err := config.Asset(lpath)
+	landing, err := Asset(lpath)
 	if err != nil {
 		log.Fatalf("Error loading %v: %v", lpath, err)
 	}

handlers/home.go

@@ -3,7 +3,6 @@ package handlers
 import (
 	"log"
 	"net/http"
-	"os"
 	"path/filepath"
 
 	"github.com/gorilla/mux"
@@ -34,12 +33,17 @@ func Home(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	index := filepath.Join("./www", playground.AssetsDir, "/index.html")
-	if _, err := os.Stat(index); os.IsNotExist(err) {
-		index = "./www/default/index.html"
+	index, err := Asset(filepath.Join(playground.AssetsDir, "/index.html"))
+	if err != nil {
+		index, err = Asset("default/index.html")
 	}
 
-	http.ServeFile(w, r, index)
+	if err != nil {
+		w.WriteHeader(http.StatusFound)
+		return
+
+	}
+	w.Write(index)
 }
 
 func Landing(rw http.ResponseWriter, req *http.Request) {

handlers/login.go

@@ -43,7 +43,7 @@ func ListProviders(rw http.ResponseWriter, req *http.Request) {
 	}
 
 	providers := []string{}
-	for name, _ := range config.Providers[playground.Id] {
+	for name := range config.Providers[playground.Id] {
 		providers = append(providers, name)
 	}
 	json.NewEncoder(rw).Encode(providers)