Feature: Unix domain socket support (#492)

Co-authored-by: Khanh Ngo <k@ndk.name>

.gitignore

@@ -21,6 +21,9 @@ node_modules/
 .vscode
 .idea
 
+# Vim
+.*.sw[op]
+
 # Examples
 examples/docker-compose/config
 examples/docker-compose/db

README.md

@@ -39,7 +39,7 @@ docker-compose up
 | Variable                    | Description                                                                                                                                                                 | Default                            |
 |-----------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------|
 | `BASE_PATH`                 | Set this variable if you run wireguard-ui under a subpath of your reverse proxy virtual host (e.g. /wireguard)                                                              | N/A                                |
-| `BIND_ADDRESS`              | The addresses that can access to the web interface and the port                                                                                                             | 0.0.0.0:80                         |
+| `BIND_ADDRESS`              | The addresses that can access to the web interface and the port, use unix:///abspath/to/file.socket for unix domain socket.                                                 | 0.0.0.0:80                         |
 | `SESSION_SECRET`            | The secret key used to encrypt the session cookies. Set this to a random value                                                                                              | N/A                                |
 | `SESSION_SECRET_FILE`       | Optional filepath for the secret key used to encrypt the session cookies. Leave `SESSION_SECRET` blank to take effect                                                       | N/A                                |
 | `WGUI_USERNAME`             | The username for the login page. Used for db initialization only                                                                                                            | `admin`                            |

main.go

@@ -8,6 +8,9 @@ import (
 	"net/http"
 	"os"
 	"time"
+	"strings"
+	"net"
+	"syscall"
 
 	"github.com/labstack/echo/v4"
 	"github.com/labstack/gommon/log"
@@ -229,7 +232,20 @@ func main() {
 	// serves other static files
 	app.GET(util.BasePath+"/static/*", echo.WrapHandler(http.StripPrefix(util.BasePath+"/static/", assetHandler)))
 
+	if strings.HasPrefix(util.BindAddress, "unix://") {
+		// Listen on unix domain socket.
+		// https://github.com/labstack/echo/issues/830
+		syscall.Unlink(util.BindAddress[6:])
+		l, err := net.Listen("unix", util.BindAddress[6:])
+		if err != nil {
+			app.Logger.Fatal(err)
+		}
+		app.Listener = l
+		app.Logger.Fatal(app.Start(""))
+	} else {
+		// Listen on TCP socket
 		app.Logger.Fatal(app.Start(util.BindAddress))
+	}
 }
 
 func initServerConfig(db store.IStore, tmplDir fs.FS) {