feat: serve static files

.drone.yml

@@ -5,7 +5,7 @@ name: default
 
 steps:
 - name: backend
-  image: golang:1.18
+  image: golang:1.23
   commands:
     - go install honnef.co/go/tools/cmd/staticcheck@latest
     - go build ./...

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18-alpine3.15 as go-builder
+FROM golang:1.23-alpine3.20 as go-builder
 ENV GOPATH ""
 
 RUN apk add git

go.mod

@@ -1,11 +1,11 @@
 module git.netflux.io/rob/netflux-homepage
 
-go 1.18
+go 1.23.3
 
-require github.com/stretchr/testify v1.7.1
+require github.com/stretchr/testify v1.9.0
 
 require (
-	github.com/davecgh/go-spew v1.1.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,11 +1,17 @@
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.7.1 h1:5TQK59W5E3v0r2duFAb7P95B6hEeOyEnHRa8MjYSMTY=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

handler/handler.go

@@ -8,31 +8,47 @@ import (
 //go:embed static/index.html
 var indexPage string
 
-func New(matrixHostname, matrixBaseURL string) http.HandlerFunc {
-	return func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != http.MethodGet && r.Method != http.MethodHead {
-			w.WriteHeader(http.StatusMethodNotAllowed)
-			w.Write([]byte("405 method not allowed\n"))
-			return
-		}
+type Params struct {
+	MatrixHostname string
+	MatrixBaseURL  string
+	RootPath       string
+}
 
-		switch r.URL.Path {
-		case "/.well-known/matrix/server":
-			w.Header().Add("content-type", "application/json")
-			w.WriteHeader(http.StatusOK)
-			w.Write([]byte(`{"m.server": "` + matrixHostname + `"}`))
-		case "/.well-known/matrix/client":
-			w.Header().Add("content-type", "application/json")
-			w.WriteHeader(http.StatusOK)
-			w.Write([]byte(`{"m.homeserver": {"base_url": "` + matrixBaseURL + `"}}`))
-		case "/":
-			w.Header().Add("content-type", "text/html")
-			w.WriteHeader(http.StatusOK)
-			if r.Method == http.MethodGet {
-				w.Write([]byte(indexPage))
-			}
-		default:
-			http.NotFound(w, r)
-		}
+type handler struct {
+	*http.ServeMux
+	params Params
+}
+
+func New(params Params) http.Handler {
+	h := &handler{
+		ServeMux: http.NewServeMux(),
+		params:   params,
+	}
+
+	h.Handle("GET /.well-known/matrix/server", http.HandlerFunc(h.getMatrixServer))
+	h.Handle("GET /.well-known/matrix/client", http.HandlerFunc(h.getMatrixClient))
+	h.Handle("GET /{$}", http.HandlerFunc(h.getHomepage))
+	h.Handle("GET /", http.FileServer(http.Dir(params.RootPath)))
+
+	return h
+}
+
+func (h *handler) getMatrixServer(w http.ResponseWriter, r *http.Request) {
+	w.Header().Add("content-type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	w.Write([]byte(`{"m.server": "` + h.params.MatrixHostname + `"}`))
+}
+
+func (h *handler) getMatrixClient(w http.ResponseWriter, r *http.Request) {
+	w.Header().Add("content-type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	w.Write([]byte(`{"m.homeserver": {"base_url": "` + h.params.MatrixBaseURL + `"}}`))
+}
+
+func (h *handler) getHomepage(w http.ResponseWriter, r *http.Request) {
+	w.Header().Add("content-type", "text/html")
+	w.WriteHeader(http.StatusOK)
+	if r.Method == http.MethodGet {
+		w.Write([]byte(indexPage))
 	}
 }

handler/handler_test.go

@@ -1,7 +1,7 @@
 package handler_test
 
 import (
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/http/httptest"
 	"testing"
@@ -41,6 +41,14 @@ func TestHandler(t *testing.T) {
 			wantStatusCode:  http.StatusOK,
 			wantBody:        `{"m.homeserver": {"base_url": "https://foo.example.com"}}`,
 		},
+		{
+			name:            "GET /test.html",
+			method:          http.MethodGet,
+			path:            "/test.html",
+			wantContentType: "text/html; charset=utf-8",
+			wantStatusCode:  http.StatusOK,
+			wantBody:        "<html>\n  <head>\n    <title>Test</title>\n  </head>\n</html>\n",
+		},
 		{
 			name:            "GET /",
 			method:          http.MethodGet,
@@ -69,7 +77,7 @@ func TestHandler(t *testing.T) {
 			method:         http.MethodPost,
 			path:           "/",
 			wantStatusCode: http.StatusMethodNotAllowed,
-			wantBody:       "405 method not allowed",
+			wantBody:       "Method Not Allowed\n",
 		},
 	}
 
@@ -78,7 +86,13 @@ func TestHandler(t *testing.T) {
 			req := httptest.NewRequest(tc.method, tc.path, nil)
 			rec := httptest.NewRecorder()
 
-			h := handler.New(matrixHostname, matrixBaseURL)
+			h := handler.New(
+				handler.Params{
+					MatrixHostname: matrixHostname,
+					MatrixBaseURL:  matrixBaseURL,
+					RootPath:       "testdata/static/",
+				},
+			)
 			h.ServeHTTP(rec, req)
 			resp := rec.Result()
 			defer resp.Body.Close()
@@ -89,7 +103,7 @@ func TestHandler(t *testing.T) {
 				assert.Equal(t, tc.wantContentType, resp.Header.Get("content-type"))
 			}
 
-			respBody, err := ioutil.ReadAll(resp.Body)
+			respBody, err := io.ReadAll(resp.Body)
 			require.NoError(t, err)
 			assert.Contains(t, string(respBody), tc.wantBody)
 		})

handler/testdata/static/test.html

@@ -0,0 +1,5 @@
+<html>
+  <head>
+    <title>Test</title>
+  </head>
+</html>

main.go

@@ -18,8 +18,9 @@ const (
 func main() {
 	matrixHostname := os.Getenv("NETFLUX_MATRIX_HOSTNAME")
 	matrixBaseURL := os.Getenv("NETFLUX_MATRIX_BASE_URL")
-	if matrixHostname == "" || matrixBaseURL == "" {
-		log.Fatal("NETFLUX_MATRIX_HOSTNAME and NETFLUX_MATRIX_BASE_URL are both required")
+	rootPath := os.Getenv("NETFLUX_ROOT_PATH")
+	if matrixHostname == "" || matrixBaseURL == "" || rootPath == "" {
+		log.Fatal("NETFLUX_MATRIX_HOSTNAME and NETFLUX_MATRIX_BASE_URL and NETFLUX_ROOT_PATH are all required")
 	}
 
 	listenAddr := os.Getenv("NETFLUX_LISTEN_ADDR")
@@ -28,8 +29,12 @@ func main() {
 	}
 
 	server := http.Server{
-		Addr:         listenAddr,
-		Handler:      handler.New(matrixHostname, matrixBaseURL),
+		Addr: listenAddr,
+		Handler: handler.New(handler.Params{
+			MatrixHostname: matrixHostname,
+			MatrixBaseURL:  matrixBaseURL,
+			RootPath:       rootPath,
+		}),
 		ReadTimeout:  readTimeout,
 		WriteTimeout: writeTimeout,
 	}