fix: fix finish_reason fileld not fully compatible with OpenAI (close #372, #373)

* optimize:unify finish_reason field

* refactor: use a global stop finish reason

---------

Co-authored-by: JustSong <songquanpeng@foxmail.com>

controller/relay-ali.go

@@ -121,7 +121,10 @@ func responseAli2OpenAI(response *AliChatResponse) *OpenAITextResponse {
 func streamResponseAli2OpenAI(aliResponse *AliChatResponse) *ChatCompletionsStreamResponse {
 	var choice ChatCompletionsStreamResponseChoice
 	choice.Delta.Content = aliResponse.Output.Text
-	choice.FinishReason = aliResponse.Output.FinishReason
+	if aliResponse.Output.FinishReason != "null" {
+		finishReason := aliResponse.Output.FinishReason
+		choice.FinishReason = &finishReason
+	}
 	response := ChatCompletionsStreamResponse{
 		Id:      aliResponse.RequestId,
 		Object:  "chat.completion.chunk",

controller/relay-baidu.go

@@ -120,7 +120,9 @@ func responseBaidu2OpenAI(response *BaiduChatResponse) *OpenAITextResponse {
 func streamResponseBaidu2OpenAI(baiduResponse *BaiduChatStreamResponse) *ChatCompletionsStreamResponse {
 	var choice ChatCompletionsStreamResponseChoice
 	choice.Delta.Content = baiduResponse.Result
-	choice.FinishReason = "stop"
+	if baiduResponse.IsEnd {
+		choice.FinishReason = &stopFinishReason
+	}
 	response := ChatCompletionsStreamResponse{
 		Id:      baiduResponse.Id,
 		Object:  "chat.completion.chunk",

controller/relay-claude.go

@@ -81,7 +81,10 @@ func requestOpenAI2Claude(textRequest GeneralOpenAIRequest) *ClaudeRequest {
 func streamResponseClaude2OpenAI(claudeResponse *ClaudeResponse) *ChatCompletionsStreamResponse {
 	var choice ChatCompletionsStreamResponseChoice
 	choice.Delta.Content = claudeResponse.Completion
-	choice.FinishReason = stopReasonClaude2OpenAI(claudeResponse.StopReason)
+	finishReason := stopReasonClaude2OpenAI(claudeResponse.StopReason)
+	if finishReason != "null" {
+		choice.FinishReason = &finishReason
+	}
 	var response ChatCompletionsStreamResponse
 	response.Object = "chat.completion.chunk"
 	response.Model = claudeResponse.Model

controller/relay-palm.go

@@ -94,7 +94,7 @@ func streamResponsePaLM2OpenAI(palmResponse *PaLMChatResponse) *ChatCompletionsS
 	if len(palmResponse.Candidates) > 0 {
 		choice.Delta.Content = palmResponse.Candidates[0].Content
 	}
-	choice.FinishReason = "stop"
+	choice.FinishReason = &stopFinishReason
 	var response ChatCompletionsStreamResponse
 	response.Object = "chat.completion.chunk"
 	response.Model = "palm2"

controller/relay-utils.go

@@ -6,6 +6,8 @@ import (
 	"one-api/common"
 )
 
+var stopFinishReason = "stop"
+
 var tokenEncoderMap = map[string]*tiktoken.Tiktoken{}
 
 func getTokenEncoder(model string) *tiktoken.Tiktoken {

controller/relay-xunfei.go

@@ -138,6 +138,9 @@ func streamResponseXunfei2OpenAI(xunfeiResponse *XunfeiChatResponse) *ChatComple
 	}
 	var choice ChatCompletionsStreamResponseChoice
 	choice.Delta.Content = xunfeiResponse.Payload.Choices.Text[0].Content
+	if xunfeiResponse.Payload.Choices.Status == 2 {
+		choice.FinishReason = &stopFinishReason
+	}
 	response := ChatCompletionsStreamResponse{
 		Object:  "chat.completion.chunk",
 		Created: common.GetTimestamp(),

controller/relay-zhipu.go

@@ -163,7 +163,6 @@ func responseZhipu2OpenAI(response *ZhipuResponse) *OpenAITextResponse {
 func streamResponseZhipu2OpenAI(zhipuResponse string) *ChatCompletionsStreamResponse {
 	var choice ChatCompletionsStreamResponseChoice
 	choice.Delta.Content = zhipuResponse
-	choice.FinishReason = ""
 	response := ChatCompletionsStreamResponse{
 		Object:  "chat.completion.chunk",
 		Created: common.GetTimestamp(),
@@ -176,7 +175,7 @@ func streamResponseZhipu2OpenAI(zhipuResponse string) *ChatCompletionsStreamResp
 func streamMetaResponseZhipu2OpenAI(zhipuResponse *ZhipuStreamMetaResponse) (*ChatCompletionsStreamResponse, *Usage) {
 	var choice ChatCompletionsStreamResponseChoice
 	choice.Delta.Content = ""
-	choice.FinishReason = "stop"
+	choice.FinishReason = &stopFinishReason
 	response := ChatCompletionsStreamResponse{
 		Id:      zhipuResponse.RequestId,
 		Object:  "chat.completion.chunk",

controller/relay.go

@@ -124,7 +124,7 @@ type ChatCompletionsStreamResponseChoice struct {
 	Delta struct {
 		Content string `json:"content"`
 	} `json:"delta"`
-	FinishReason string `json:"finish_reason,omitempty"`
+	FinishReason *string `json:"finish_reason"`
 }
 
 type ChatCompletionsStreamResponse struct {