Add custom path to gRPC (#1815)

transport/internet/grpc/config.go

@@ -2,6 +2,7 @@ package grpc
 
 import (
 	"net/url"
+	"strings"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/transport/internet"
@@ -15,6 +16,41 @@ func init() {
 	}))
 }
 
-func (c *Config) getNormalizedName() string {
-	return url.PathEscape(c.ServiceName)
+func (c *Config) getServiceName() string {
+	// Normal old school config
+	if !strings.HasPrefix(c.ServiceName, "/") {
+		return url.PathEscape(c.ServiceName)
+	}
+	// Otherwise new custom paths
+	rawServiceName := c.ServiceName[1:strings.LastIndex(c.ServiceName, "/")] // trim from first to last '/'
+	serviceNameParts := strings.Split(rawServiceName, "/")
+	for i := range serviceNameParts {
+		serviceNameParts[i] = url.PathEscape(serviceNameParts[i])
+	}
+	return strings.Join(serviceNameParts, "/")
+}
+
+func (c *Config) getTunStreamName() string {
+	// Normal old school config
+	if !strings.HasPrefix(c.ServiceName, "/") {
+		return "Tun"
+	}
+	// Otherwise new custom paths
+	endingPath := c.ServiceName[strings.LastIndex(c.ServiceName, "/")+1:] // from the last '/' to end of string
+	return url.PathEscape(strings.Split(endingPath, "|")[0])
+}
+
+func (c *Config) getTunMultiStreamName() string {
+	// Normal old school config
+	if !strings.HasPrefix(c.ServiceName, "/") {
+		return "TunMulti"
+	}
+	// Otherwise new custom paths
+	endingPath := c.ServiceName[strings.LastIndex(c.ServiceName, "/")+1:] // from the last '/' to end of string
+	streamNames := strings.Split(endingPath, "|")
+	if len(streamNames) == 1 { // client side. Service name is the full path to multi tun
+		return url.PathEscape(streamNames[0])
+	} else { // server side. The second part is the path to multi tun
+		return url.PathEscape(streamNames[1])
+	}
 }