fix(serverHandler/wsl1): strip alias URL prefix when serving content

Author: marjune163

src/serverHandler/aliasHandler.go

@@ -13,7 +13,7 @@ import (
 
 var defaultHandler = http.NotFoundHandler()
 
-var createFileServer func(root string) http.Handler
+var createFileServer func(aliasUrl, aliasFs string) http.Handler
 
 type pathStrings struct {
 	path    string
@@ -219,7 +219,7 @@ func newAliasHandler(
 
 	var fileServer http.Handler
 	if !emptyRoot && createFileServer != nil { // for WSL 1 fix
-		fileServer = createFileServer(currentAlias.fs)
+		fileServer = createFileServer(currentAlias.url, currentAlias.fs)
 	}
 
 	h := &aliasHandler{

src/serverHandler/wsl1.go

@@ -23,8 +23,11 @@ func (fs wrappedHttpFileSystem) Open(name string) (http.File, error) {
 	return wrappedHttpFile{file}, err
 }
 
-func createFsFileServer(root string) http.Handler {
-	return http.FileServer(wrappedHttpFileSystem{http.Dir(root)})
+func createFsFileServer(aliasUrl, aliasFs string) http.Handler {
+	fs := wrappedHttpFileSystem{http.Dir(aliasFs)}
+	handler := http.FileServer(fs)
+	handler = http.StripPrefix(aliasUrl, handler)
+	return handler
 }
 
 func serveFsContent(h *aliasHandler, w http.ResponseWriter, r *http.Request, info os.FileInfo, file *os.File) {