feat: suno api 支持

feat: 调试 suno

feat: 补充suno 文档

relay/constant/relay_mode.go

@@ -1,6 +1,9 @@
 package constant
 
-import "strings"
+import (
+	"net/http"
+	"strings"
+)
 
 const (
 	RelayModeUnknown = iota
@@ -26,6 +29,9 @@ const (
 	RelayModeMidjourneyModal
 	RelayModeMidjourneyShorten
 	RelayModeSwapFace
+	RelayModeSunoFetch
+	RelayModeSunoFetchByID
+	RelayModeSunoSubmit
 )
 
 func Path2RelayMode(path string) int {
@@ -89,3 +95,15 @@ func Path2RelayModeMidjourney(path string) int {
 	}
 	return relayMode
 }
+
+func Path2RelaySuno(method, path string) int {
+	relayMode := RelayModeUnknown
+	if method == http.MethodPost && strings.HasSuffix(path, "/fetch") {
+		relayMode = RelayModeSunoFetch
+	} else if method == http.MethodGet && strings.Contains(path, "/fetch/") {
+		relayMode = RelayModeSunoFetchByID
+	} else if strings.Contains(path, "/submit/") {
+		relayMode = RelayModeSunoSubmit
+	}
+	return relayMode
+}