fix: 修复 dall-e-2 请求报错

relay/relay-image.go

@@ -38,9 +38,7 @@ func getAndValidImageRequest(c *gin.Context, info *relaycommon.RelayInfo) (*dto.
 	if imageRequest.Model == "" {
 		imageRequest.Model = "dall-e-2"
 	}
-	if imageRequest.Quality == "" {
-		imageRequest.Quality = "standard"
-	}
+
 	// Not "256x256", "512x512", or "1024x1024"
 	if imageRequest.Model == "dall-e-2" || imageRequest.Model == "dall-e" {
 		if imageRequest.Size != "" && imageRequest.Size != "256x256" && imageRequest.Size != "512x512" && imageRequest.Size != "1024x1024" {
@@ -50,6 +48,9 @@ func getAndValidImageRequest(c *gin.Context, info *relaycommon.RelayInfo) (*dto.
 		if imageRequest.Size != "" && imageRequest.Size != "1024x1024" && imageRequest.Size != "1024x1792" && imageRequest.Size != "1792x1024" {
 			return nil, errors.New("size must be one of 256x256, 512x512, or 1024x1024, dall-e-3 1024x1792 or 1792x1024")
 		}
+		if imageRequest.Quality == "" {
+			imageRequest.Quality = "standard"
+		}
 		//if imageRequest.N != 1 {
 		//	return nil, errors.New("n must be 1")
 		//}