feat: serve clients binaries from a local directory

Fixes #44.

Signed-off-by: Julien Riou <julien@riou.xyz>

src/cmd/collerd/README.md

@@ -41,6 +41,7 @@ The file format is **JSON**:
 * **tls_key_file** (string): Path to TLS key file to enable HTTPS
 * **ace_directory** (string): Serve [Ace](hhttps://ace.c9.io/) assets from this local directory (ex: "./node_modules/ace-builds"). See **Dependencies** for details.
 * **bootstrap_directory** (string): Serve [Bootstrap](https://getbootstrap.com/) assets from this local directory (ex: "./node_modules/bootstrap/dist"). See **Dependencies** for details.
+* **clients_directory** (string): Serve clients binaries from this local directory (ex: "./releases/1.2.0")
 * **disable_editor** (bool): Disable Ace editor.
 
 The configuration file is not required but the service might not be exposed to the public.

src/server/config.go

@@ -34,6 +34,7 @@ type Config struct {
 	AceDirectory             string   `json:"ace_directory"`
 	BootstrapDirectory       string   `json:"bootstrap_directory"`
 	DisableEditor            bool     `json:"disable_editor"`
+	ClientsDirectory         string   `json:"clients_directory"`
 }
 
 func NewConfig() *Config {

src/server/handlers_api.go

@@ -232,8 +232,9 @@ func (h *GetProtectedNoteHandler) ServeHTTP(w http.ResponseWriter, r *http.Reque
 }
 
 type ClientHandler struct {
-	logger  *slog.Logger
+	logger    *slog.Logger
-	version string
+	version   string
+	directory string
 }
 
 func (h *ClientHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
@@ -253,5 +254,9 @@ func (h *ClientHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		version = "latest"
 	}
 
-	http.Redirect(w, r, fmt.Sprintf("https://git.riou.xyz/jriou/coller/releases/download/%s/%s-%s-%s", version, clientName, os, arch), http.StatusMovedPermanently)
+	if h.directory != "" {
+		http.ServeFile(w, r, h.directory+"/"+fmt.Sprintf("%s-%s-%s", clientName, os, arch))
+	} else {
+		http.Redirect(w, r, fmt.Sprintf("https://git.riou.xyz/jriou/coller/releases/download/%s/%s-%s-%s", version, clientName, os, arch), http.StatusMovedPermanently)
+	}
 }

src/server/server.go

@@ -133,8 +133,9 @@ func (s *Server) Start() error {
 	r.Path("/clients.html").Handler(clientsHandler).Methods("GET")
 
 	clientHandler := &ClientHandler{
-		logger:  s.logger,
+		logger:    s.logger,
-		version: p.Version,
+		version:   p.Version,
+		directory: s.config.ClientsDirectory,
 	}
 	r.Path("/clients/{os:[a-z]+}-{arch:[a-z0-9]+}/{clientName:[a-z]+}").Handler(clientHandler).Methods("GET")