Update relay-ali.go:改进stream模式，添加联网搜索能力

通义千问支持stream的增量模式，不需要每次去掉上次的前缀；实测qwen-max联网模式效果不错，添加了联网模式。如果别的模型有问题可以改为单独给qwen-max开放

controller/relay-ali.go

@@ -95,12 +95,14 @@ func requestOpenAI2Ali(request GeneralOpenAIRequest) *AliChatRequest {
 		Input: AliInput{
 			Messages: messages,
 		},
-		//Parameters: AliParameters{  // ChatGPT's parameters are not compatible with Ali's
+		Parameters: AliParameters{  // ChatGPT's parameters are not compatible with Ali's
 		//	TopP: request.TopP,
 		//	TopK: 50,
 		//	//Seed:         0,
-		//	//EnableSearch: false,
-		//},
+			EnableSearch: true,
+			incremental_output=true,
+			stream=request.Stream,
+		},
 	}
 }
 
@@ -202,7 +204,7 @@ func streamResponseAli2OpenAI(aliResponse *AliChatResponse) *ChatCompletionsStre
 		Id:      aliResponse.RequestId,
 		Object:  "chat.completion.chunk",
 		Created: common.GetTimestamp(),
-		Model:   "ernie-bot",
+		Model:   "qwen",
 		Choices: []ChatCompletionsStreamResponseChoice{choice},
 	}
 	return &response
@@ -240,7 +242,7 @@ func aliStreamHandler(c *gin.Context, resp *http.Response) (*OpenAIErrorWithStat
 		stopChan <- true
 	}()
 	setEventStreamHeaders(c)
-	lastResponseText := ""
+	//lastResponseText := ""
 	c.Stream(func(w io.Writer) bool {
 		select {
 		case data := <-dataChan:
@@ -256,8 +258,8 @@ func aliStreamHandler(c *gin.Context, resp *http.Response) (*OpenAIErrorWithStat
 				usage.TotalTokens = aliResponse.Usage.InputTokens + aliResponse.Usage.OutputTokens
 			}
 			response := streamResponseAli2OpenAI(&aliResponse)
-			response.Choices[0].Delta.Content = strings.TrimPrefix(response.Choices[0].Delta.Content, lastResponseText)
-			lastResponseText = aliResponse.Output.Text
+			//response.Choices[0].Delta.Content = strings.TrimPrefix(response.Choices[0].Delta.Content, lastResponseText)
+			//lastResponseText = aliResponse.Output.Text
 			jsonResponse, err := json.Marshal(response)
 			if err != nil {
 				common.SysError("error marshalling stream response: " + err.Error())