fix gpt-4 & gpt-4-browsing

handlers.go

@@ -142,6 +142,9 @@ func nightmare(c *gin.Context) {
 			if original_response.Error != nil {
 				return
 			}
+			if original_response.Message.Content.Parts == nil {
+				continue
+			}
 			if original_response.Message.Content.Parts[0] == "" || original_response.Message.Author.Role != "assistant" {
 				continue
 			}

internal/chatgpt/convert.go

@@ -2,10 +2,17 @@ package chatgpt
 
 import (
 	typings "freechatgpt/internal/typings"
+	"strings"
 )
 
 func ConvertAPIRequest(api_request typings.APIRequest) ChatGPTRequest {
 	chatgpt_request := NewChatGPTRequest()
+	if strings.HasPrefix(api_request.Model, "gpt-4") {
+		chatgpt_request.Model = "gpt-4"
+		if api_request.Model == "gpt-4-browsing" {
+			chatgpt_request.Model = "gpt-4-browsing"
+		}
+	}
 	for _, api_message := range api_request.Messages {
 		if api_message.Role == "system" {
 			api_message.Role = "critic"