add path prefix #196.

docs/changelog.md

@@ -4,6 +4,7 @@
 
 ### New Features
 - Added `m1k1o/neko:vivaldi` tag (thanks @Xeddius).
+- Added `NEKO_PATH_PREFIX`.
 
 ## [n.eko v2.6](https://github.com/m1k1o/neko/releases/tag/v2.6)
 

docs/getting-started/configuration.md

@@ -134,6 +134,9 @@ nat1to1: <ip>
 #### `NEKO_PROXY`:
   - Enable reverse proxy mode, so that neko trusts `X-Forwarded-For` headers.
   - e.g. `false`
+#### `NEKO_PATH_PREFIX`:
+  - Path prefix for HTTP requests.
+  - e.g. `/neko/`
 
 ### Expert settings
 

server/internal/http/http.go

@@ -30,6 +30,12 @@ func New(conf *config.Server, webSocketHandler types.WebSocketHandler) *Server {
 	router.Use(middleware.RequestLogger(&logformatter{logger}))
 	router.Use(middleware.Recoverer) // Recover from panics without crashing server
 
+	if conf.PathPrefix != "/" {
+		router.Use(func(h http.Handler) http.Handler {
+			return http.StripPrefix(conf.PathPrefix, h)
+		})
+	}
+
 	router.Get("/ws", func(w http.ResponseWriter, r *http.Request) {
 		err := webSocketHandler.Upgrade(w, r)
 		if err != nil {

server/internal/types/config/server.go

@@ -1,6 +1,8 @@
 package config
 
 import (
+	"path"
+
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -10,6 +12,7 @@ type Server struct {
 	Key        string
 	Bind       string
 	Static     string
+	PathPrefix string
 }
 
 func (Server) Init(cmd *cobra.Command) error {
@@ -33,6 +36,11 @@ func (Server) Init(cmd *cobra.Command) error {
 		return err
 	}
 
+	cmd.PersistentFlags().String("path_prefix", "/", "path prefix for HTTP requests")
+	if err := viper.BindPFlag("path_prefix", cmd.PersistentFlags().Lookup("path_prefix")); err != nil {
+		return err
+	}
+
 	return nil
 }
 
@@ -41,4 +49,5 @@ func (s *Server) Set() {
 	s.Key = viper.GetString("key")
 	s.Bind = viper.GetString("bind")
 	s.Static = viper.GetString("static")
+	s.PathPrefix = path.Join("/", path.Clean(viper.GetString("path_prefix")))
 }