feat: convert gemini format to openai chat completions

relay/channel/gemini/dto.go → dto/gemini.go

-package gemini
+package dto
 
 import (
 	"encoding/json"
@@ -56,7 +56,7 @@ type FunctionCall struct {
 	Arguments    any    `json:"args"`
 }
 
-type FunctionResponse struct {
+type GeminiFunctionResponse struct {
 	Name     string                 `json:"name"`
 	Response map[string]interface{} `json:"response"`
 }
@@ -81,7 +81,7 @@ type GeminiPart struct {
 	Thought             bool                           `json:"thought,omitempty"`
 	InlineData          *GeminiInlineData              `json:"inlineData,omitempty"`
 	FunctionCall        *FunctionCall                  `json:"functionCall,omitempty"`
-	FunctionResponse    *FunctionResponse              `json:"functionResponse,omitempty"`
+	FunctionResponse    *GeminiFunctionResponse        `json:"functionResponse,omitempty"`
 	FileData            *GeminiFileData                `json:"fileData,omitempty"`
 	ExecutableCode      *GeminiPartExecutableCode      `json:"executableCode,omitempty"`
 	CodeExecutionResult *GeminiPartCodeExecutionResult `json:"codeExecutionResult,omitempty"`

relay/channel/adapter.go

@@ -26,6 +26,7 @@ type Adaptor interface {
 	GetModelList() []string
 	GetChannelName() string
 	ConvertClaudeRequest(c *gin.Context, info *relaycommon.RelayInfo, request *dto.ClaudeRequest) (any, error)
+	ConvertGeminiRequest(c *gin.Context, info *relaycommon.RelayInfo, request *dto.GeminiChatRequest) (any, error)
 }
 
 type TaskAdaptor interface {

relay/channel/ali/adaptor.go

@@ -18,6 +18,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/aws/adaptor.go

@@ -22,6 +22,11 @@ type Adaptor struct {
 	RequestMode int
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(c *gin.Context, info *relaycommon.RelayInfo, request *dto.ClaudeRequest) (any, error) {
 	c.Set("request_model", request.Model)
 	c.Set("converted_request", request)

relay/channel/baidu/adaptor.go

@@ -18,6 +18,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/baidu_v2/adaptor.go

@@ -18,6 +18,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")
@@ -43,15 +48,15 @@ func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
 
 func (a *Adaptor) SetupRequestHeader(c *gin.Context, req *http.Header, info *relaycommon.RelayInfo) error {
 	channel.SetupApiRequestHeader(info, c, req)
-        keyParts := strings.Split(info.ApiKey, "|")
+	keyParts := strings.Split(info.ApiKey, "|")
 	if len(keyParts) == 0 || keyParts[0] == "" {
-        	return errors.New("invalid API key: authorization token is required")
-        }
-	 if len(keyParts) > 1 {
-               if keyParts[1] != "" {
-                       req.Set("appid", keyParts[1])
-               }
-        }
+		return errors.New("invalid API key: authorization token is required")
+	}
+	if len(keyParts) > 1 {
+		if keyParts[1] != "" {
+			req.Set("appid", keyParts[1])
+		}
+	}
 	req.Set("Authorization", "Bearer "+keyParts[0])
 	return nil
 }

relay/channel/claude/adaptor.go

@@ -24,6 +24,11 @@ type Adaptor struct {
 	RequestMode int
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(c *gin.Context, info *relaycommon.RelayInfo, request *dto.ClaudeRequest) (any, error) {
 	return request, nil
 }

relay/channel/claude_code/adaptor.go

@@ -25,6 +25,11 @@ type Adaptor struct {
 	RequestMode int
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(c *gin.Context, info *relaycommon.RelayInfo, request *dto.ClaudeRequest) (any, error) {
 	// Use configured system prompt if available, otherwise use default
 	if info.ChannelSetting.SystemPrompt != "" {

relay/channel/cloudflare/adaptor.go

@@ -18,6 +18,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/cohere/adaptor.go

@@ -17,6 +17,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/coze/adaptor.go

@@ -18,6 +18,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *common.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 // ConvertAudioRequest implements channel.Adaptor.
 func (a *Adaptor) ConvertAudioRequest(c *gin.Context, info *common.RelayInfo, request dto.AudioRequest) (io.Reader, error) {
 	return nil, errors.New("not implemented")

relay/channel/deepseek/adaptor.go

@@ -19,6 +19,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/dify/adaptor.go

@@ -24,6 +24,11 @@ type Adaptor struct {
 	BotType int
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/gemini/adaptor.go

@@ -20,6 +20,10 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(c *gin.Context, info *relaycommon.RelayInfo, request *dto.GeminiChatRequest) (any, error) {
+	return request, nil
+}
+
 func (a *Adaptor) ConvertClaudeRequest(c *gin.Context, info *relaycommon.RelayInfo, req *dto.ClaudeRequest) (any, error) {
 	adaptor := openai.Adaptor{}
 	oaiReq, err := adaptor.ConvertClaudeRequest(c, info, req)
@@ -51,13 +55,13 @@ func (a *Adaptor) ConvertImageRequest(c *gin.Context, info *relaycommon.RelayInf
 	}
 
 	// build gemini imagen request
-	geminiRequest := GeminiImageRequest{
-		Instances: []GeminiImageInstance{
+	geminiRequest := dto.GeminiImageRequest{
+		Instances: []dto.GeminiImageInstance{
 			{
 				Prompt: request.Prompt,
 			},
 		},
-		Parameters: GeminiImageParameters{
+		Parameters: dto.GeminiImageParameters{
 			SampleCount:      request.N,
 			AspectRatio:      aspectRatio,
 			PersonGeneration: "allow_adult", // default allow adult
@@ -138,9 +142,9 @@ func (a *Adaptor) ConvertEmbeddingRequest(c *gin.Context, info *relaycommon.Rela
 	}
 
 	// only process the first input
-	geminiRequest := GeminiEmbeddingRequest{
-		Content: GeminiChatContent{
-			Parts: []GeminiPart{
+	geminiRequest := dto.GeminiEmbeddingRequest{
+		Content: dto.GeminiChatContent{
+			Parts: []dto.GeminiPart{
 				{
 					Text: inputs[0],
 				},

relay/channel/gemini/relay-gemini-native.go

@@ -28,7 +28,7 @@ func GeminiTextGenerationHandler(c *gin.Context, info *relaycommon.RelayInfo, re
 	}
 
 	// 解析为 Gemini 原生响应格式
-	var geminiResponse GeminiChatResponse
+	var geminiResponse dto.GeminiChatResponse
 	err = common.Unmarshal(responseBody, &geminiResponse)
 	if err != nil {
 		return nil, types.NewOpenAIError(err, types.ErrorCodeBadResponseBody, http.StatusInternalServerError)
@@ -71,7 +71,7 @@ func GeminiTextGenerationStreamHandler(c *gin.Context, info *relaycommon.RelayIn
 	responseText := strings.Builder{}
 
 	helper.StreamScannerHandler(c, resp, info, func(data string) bool {
-		var geminiResponse GeminiChatResponse
+		var geminiResponse dto.GeminiChatResponse
 		err := common.UnmarshalJsonStr(data, &geminiResponse)
 		if err != nil {
 			common.LogError(c, "error unmarshalling stream response: "+err.Error())

relay/channel/gemini/relay-gemini.go

@@ -81,7 +81,7 @@ func clampThinkingBudget(modelName string, budget int) int {
 	return budget
 }
 
-func ThinkingAdaptor(geminiRequest *GeminiChatRequest, info *relaycommon.RelayInfo) {
+func ThinkingAdaptor(geminiRequest *dto.GeminiChatRequest, info *relaycommon.RelayInfo) {
 	if model_setting.GetGeminiSettings().ThinkingAdapterEnabled {
 		modelName := info.UpstreamModelName
 		isNew25Pro := strings.HasPrefix(modelName, "gemini-2.5-pro") &&
@@ -93,7 +93,7 @@ func ThinkingAdaptor(geminiRequest *GeminiChatRequest, info *relaycommon.RelayIn
 			if len(parts) == 2 && parts[1] != "" {
 				if budgetTokens, err := strconv.Atoi(parts[1]); err == nil {
 					clampedBudget := clampThinkingBudget(modelName, budgetTokens)
-					geminiRequest.GenerationConfig.ThinkingConfig = &GeminiThinkingConfig{
+					geminiRequest.GenerationConfig.ThinkingConfig = &dto.GeminiThinkingConfig{
 						ThinkingBudget:  common.GetPointer(clampedBudget),
 						IncludeThoughts: true,
 					}
@@ -113,11 +113,11 @@ func ThinkingAdaptor(geminiRequest *GeminiChatRequest, info *relaycommon.RelayIn
 			}
 
 			if isUnsupported {
-				geminiRequest.GenerationConfig.ThinkingConfig = &GeminiThinkingConfig{
+				geminiRequest.GenerationConfig.ThinkingConfig = &dto.GeminiThinkingConfig{
 					IncludeThoughts: true,
 				}
 			} else {
-				geminiRequest.GenerationConfig.ThinkingConfig = &GeminiThinkingConfig{
+				geminiRequest.GenerationConfig.ThinkingConfig = &dto.GeminiThinkingConfig{
 					IncludeThoughts: true,
 				}
 				if geminiRequest.GenerationConfig.MaxOutputTokens > 0 {
@@ -128,7 +128,7 @@ func ThinkingAdaptor(geminiRequest *GeminiChatRequest, info *relaycommon.RelayIn
 			}
 		} else if strings.HasSuffix(modelName, "-nothinking") {
 			if !isNew25Pro {
-				geminiRequest.GenerationConfig.ThinkingConfig = &GeminiThinkingConfig{
+				geminiRequest.GenerationConfig.ThinkingConfig = &dto.GeminiThinkingConfig{
 					ThinkingBudget: common.GetPointer(0),
 				}
 			}
@@ -137,11 +137,11 @@ func ThinkingAdaptor(geminiRequest *GeminiChatRequest, info *relaycommon.RelayIn
 }
 
 // Setting safety to the lowest possible values since Gemini is already powerless enough
-func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon.RelayInfo) (*GeminiChatRequest, error) {
+func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon.RelayInfo) (*dto.GeminiChatRequest, error) {
 
-	geminiRequest := GeminiChatRequest{
-		Contents: make([]GeminiChatContent, 0, len(textRequest.Messages)),
-		GenerationConfig: GeminiChatGenerationConfig{
+	geminiRequest := dto.GeminiChatRequest{
+		Contents: make([]dto.GeminiChatContent, 0, len(textRequest.Messages)),
+		GenerationConfig: dto.GeminiChatGenerationConfig{
 			Temperature:     textRequest.Temperature,
 			TopP:            textRequest.TopP,
 			MaxOutputTokens: textRequest.MaxTokens,
@@ -158,9 +158,9 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon
 
 	ThinkingAdaptor(&geminiRequest, info)
 
-	safetySettings := make([]GeminiChatSafetySettings, 0, len(SafetySettingList))
+	safetySettings := make([]dto.GeminiChatSafetySettings, 0, len(SafetySettingList))
 	for _, category := range SafetySettingList {
-		safetySettings = append(safetySettings, GeminiChatSafetySettings{
+		safetySettings = append(safetySettings, dto.GeminiChatSafetySettings{
 			Category:  category,
 			Threshold: model_setting.GetGeminiSafetySetting(category),
 		})
@@ -198,17 +198,17 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon
 			functions = append(functions, tool.Function)
 		}
 		if codeExecution {
-			geminiRequest.Tools = append(geminiRequest.Tools, GeminiChatTool{
+			geminiRequest.Tools = append(geminiRequest.Tools, dto.GeminiChatTool{
 				CodeExecution: make(map[string]string),
 			})
 		}
 		if googleSearch {
-			geminiRequest.Tools = append(geminiRequest.Tools, GeminiChatTool{
+			geminiRequest.Tools = append(geminiRequest.Tools, dto.GeminiChatTool{
 				GoogleSearch: make(map[string]string),
 			})
 		}
 		if len(functions) > 0 {
-			geminiRequest.Tools = append(geminiRequest.Tools, GeminiChatTool{
+			geminiRequest.Tools = append(geminiRequest.Tools, dto.GeminiChatTool{
 				FunctionDeclarations: functions,
 			})
 		}
@@ -238,7 +238,7 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon
 			continue
 		} else if message.Role == "tool" || message.Role == "function" {
 			if len(geminiRequest.Contents) == 0 || geminiRequest.Contents[len(geminiRequest.Contents)-1].Role == "model" {
-				geminiRequest.Contents = append(geminiRequest.Contents, GeminiChatContent{
+				geminiRequest.Contents = append(geminiRequest.Contents, dto.GeminiChatContent{
 					Role: "user",
 				})
 			}
@@ -265,18 +265,18 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon
 				}
 			}
 
-			functionResp := &FunctionResponse{
+			functionResp := &dto.GeminiFunctionResponse{
 				Name:     name,
 				Response: contentMap,
 			}
 
-			*parts = append(*parts, GeminiPart{
+			*parts = append(*parts, dto.GeminiPart{
 				FunctionResponse: functionResp,
 			})
 			continue
 		}
-		var parts []GeminiPart
-		content := GeminiChatContent{
+		var parts []dto.GeminiPart
+		content := dto.GeminiChatContent{
 			Role: message.Role,
 		}
 		// isToolCall := false
@@ -290,8 +290,8 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon
 						return nil, fmt.Errorf("invalid arguments for function %s, args: %s", call.Function.Name, call.Function.Arguments)
 					}
 				}
-				toolCall := GeminiPart{
-					FunctionCall: &FunctionCall{
+				toolCall := dto.GeminiPart{
+					FunctionCall: &dto.FunctionCall{
 						FunctionName: call.Function.Name,
 						Arguments:    args,
 					},
@@ -308,7 +308,7 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon
 				if part.Text == "" {
 					continue
 				}
-				parts = append(parts, GeminiPart{
+				parts = append(parts, dto.GeminiPart{
 					Text: part.Text,
 				})
 			} else if part.Type == dto.ContentTypeImageURL {
@@ -331,8 +331,8 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon
 						return nil, fmt.Errorf("mime type is not supported by Gemini: '%s', url: '%s', supported types are: %v", fileData.MimeType, url, getSupportedMimeTypesList())
 					}
 
-					parts = append(parts, GeminiPart{
-						InlineData: &GeminiInlineData{
+					parts = append(parts, dto.GeminiPart{
+						InlineData: &dto.GeminiInlineData{
 							MimeType: fileData.MimeType, // 使用原始的 MimeType，因为大小写可能对API有意义
 							Data:     fileData.Base64Data,
 						},
@@ -342,8 +342,8 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon
 					if err != nil {
 						return nil, fmt.Errorf("decode base64 image data failed: %s", err.Error())
 					}
-					parts = append(parts, GeminiPart{
-						InlineData: &GeminiInlineData{
+					parts = append(parts, dto.GeminiPart{
+						InlineData: &dto.GeminiInlineData{
 							MimeType: format,
 							Data:     base64String,
 						},
@@ -357,8 +357,8 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon
 				if err != nil {
 					return nil, fmt.Errorf("decode base64 file data failed: %s", err.Error())
 				}
-				parts = append(parts, GeminiPart{
-					InlineData: &GeminiInlineData{
+				parts = append(parts, dto.GeminiPart{
+					InlineData: &dto.GeminiInlineData{
 						MimeType: format,
 						Data:     base64String,
 					},
@@ -371,8 +371,8 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon
 				if err != nil {
 					return nil, fmt.Errorf("decode base64 audio data failed: %s", err.Error())
 				}
-				parts = append(parts, GeminiPart{
-					InlineData: &GeminiInlineData{
+				parts = append(parts, dto.GeminiPart{
+					InlineData: &dto.GeminiInlineData{
 						MimeType: "audio/" + part.GetInputAudio().Format,
 						Data:     base64String,
 					},
@@ -392,8 +392,8 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest, info *relaycommon
 	}
 
 	if len(system_content) > 0 {
-		geminiRequest.SystemInstructions = &GeminiChatContent{
-			Parts: []GeminiPart{
+		geminiRequest.SystemInstructions = &dto.GeminiChatContent{
+			Parts: []dto.GeminiPart{
 				{
 					Text: strings.Join(system_content, "\n"),
 				},
@@ -636,7 +636,7 @@ func unescapeMapOrSlice(data interface{}) interface{} {
 	return data
 }
 
-func getResponseToolCall(item *GeminiPart) *dto.ToolCallResponse {
+func getResponseToolCall(item *dto.GeminiPart) *dto.ToolCallResponse {
 	var argsBytes []byte
 	var err error
 	if result, ok := item.FunctionCall.Arguments.(map[string]interface{}); ok {
@@ -658,7 +658,7 @@ func getResponseToolCall(item *GeminiPart) *dto.ToolCallResponse {
 	}
 }
 
-func responseGeminiChat2OpenAI(c *gin.Context, response *GeminiChatResponse) *dto.OpenAITextResponse {
+func responseGeminiChat2OpenAI(c *gin.Context, response *dto.GeminiChatResponse) *dto.OpenAITextResponse {
 	fullTextResponse := dto.OpenAITextResponse{
 		Id:      helper.GetResponseID(c),
 		Object:  "chat.completion",
@@ -725,7 +725,7 @@ func responseGeminiChat2OpenAI(c *gin.Context, response *GeminiChatResponse) *dt
 	return &fullTextResponse
 }
 
-func streamResponseGeminiChat2OpenAI(geminiResponse *GeminiChatResponse) (*dto.ChatCompletionsStreamResponse, bool, bool) {
+func streamResponseGeminiChat2OpenAI(geminiResponse *dto.GeminiChatResponse) (*dto.ChatCompletionsStreamResponse, bool, bool) {
 	choices := make([]dto.ChatCompletionsStreamResponseChoice, 0, len(geminiResponse.Candidates))
 	isStop := false
 	hasImage := false
@@ -830,7 +830,7 @@ func GeminiChatStreamHandler(c *gin.Context, info *relaycommon.RelayInfo, resp *
 	respCount := 0
 
 	helper.StreamScannerHandler(c, resp, info, func(data string) bool {
-		var geminiResponse GeminiChatResponse
+		var geminiResponse dto.GeminiChatResponse
 		err := common.UnmarshalJsonStr(data, &geminiResponse)
 		if err != nil {
 			common.LogError(c, "error unmarshalling stream response: "+err.Error())
@@ -913,7 +913,7 @@ func GeminiChatHandler(c *gin.Context, info *relaycommon.RelayInfo, resp *http.R
 	if common.DebugEnabled {
 		println(string(responseBody))
 	}
-	var geminiResponse GeminiChatResponse
+	var geminiResponse dto.GeminiChatResponse
 	err = common.Unmarshal(responseBody, &geminiResponse)
 	if err != nil {
 		return nil, types.NewOpenAIError(err, types.ErrorCodeBadResponseBody, http.StatusInternalServerError)
@@ -959,7 +959,7 @@ func GeminiEmbeddingHandler(c *gin.Context, info *relaycommon.RelayInfo, resp *h
 		return nil, types.NewOpenAIError(readErr, types.ErrorCodeBadResponseBody, http.StatusInternalServerError)
 	}
 
-	var geminiResponse GeminiEmbeddingResponse
+	var geminiResponse dto.GeminiEmbeddingResponse
 	if jsonErr := common.Unmarshal(responseBody, &geminiResponse); jsonErr != nil {
 		return nil, types.NewOpenAIError(jsonErr, types.ErrorCodeBadResponseBody, http.StatusInternalServerError)
 	}
@@ -1005,7 +1005,7 @@ func GeminiImageHandler(c *gin.Context, info *relaycommon.RelayInfo, resp *http.
 	}
 	_ = resp.Body.Close()
 
-	var geminiResponse GeminiImageResponse
+	var geminiResponse dto.GeminiImageResponse
 	if jsonErr := common.Unmarshal(responseBody, &geminiResponse); jsonErr != nil {
 		return nil, types.NewOpenAIError(jsonErr, types.ErrorCodeBadResponseBody, http.StatusInternalServerError)
 	}

relay/channel/jimeng/adaptor.go

@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"github.com/gin-gonic/gin"
 	"io"
 	"net/http"
 	"one-api/dto"
@@ -13,11 +12,18 @@ import (
 	relaycommon "one-api/relay/common"
 	relayconstant "one-api/relay/constant"
 	"one-api/types"
+
+	"github.com/gin-gonic/gin"
 )
 
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	return nil, errors.New("not implemented")
 }

relay/channel/jina/adaptor.go

@@ -19,6 +19,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/mistral/adaptor.go

@@ -16,6 +16,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/mokaai/adaptor.go

@@ -18,6 +18,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/ollama/adaptor.go

@@ -17,6 +17,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(c *gin.Context, info *relaycommon.RelayInfo, request *dto.ClaudeRequest) (any, error) {
 	openaiAdaptor := openai.Adaptor{}
 	openaiRequest, err := openaiAdaptor.ConvertClaudeRequest(c, info, request)

relay/channel/openai/adaptor.go

@@ -34,6 +34,15 @@ type Adaptor struct {
 	ResponseFormat string
 }
 
+func (a *Adaptor) ConvertGeminiRequest(c *gin.Context, info *relaycommon.RelayInfo, request *dto.GeminiChatRequest) (any, error) {
+	// 使用 service.GeminiToOpenAIRequest 转换请求格式
+	openaiRequest, err := service.GeminiToOpenAIRequest(request, info)
+	if err != nil {
+		return nil, err
+	}
+	return a.ConvertOpenAIRequest(c, info, openaiRequest)
+}
+
 func (a *Adaptor) ConvertClaudeRequest(c *gin.Context, info *relaycommon.RelayInfo, request *dto.ClaudeRequest) (any, error) {
 	//if !strings.Contains(request.Model, "claude") {
 	//	return nil, fmt.Errorf("you are using openai channel type with path /v1/messages, only claude model supported convert, but got %s", request.Model)
@@ -64,7 +73,7 @@ func (a *Adaptor) Init(info *relaycommon.RelayInfo) {
 }
 
 func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
-	if info.RelayFormat == relaycommon.RelayFormatClaude {
+	if info.RelayFormat == relaycommon.RelayFormatClaude || info.RelayFormat == relaycommon.RelayFormatGemini {
 		return fmt.Sprintf("%s/v1/chat/completions", info.BaseUrl), nil
 	}
 	if info.RelayMode == relayconstant.RelayModeRealtime {

relay/channel/openai/helper.go

@@ -2,6 +2,8 @@ package openai
 
 import (
 	"encoding/json"
+	"errors"
+	"net/http"
 	"one-api/common"
 	"one-api/dto"
 	relaycommon "one-api/relay/common"
@@ -16,11 +18,14 @@ import (
 // 辅助函数
 func HandleStreamFormat(c *gin.Context, info *relaycommon.RelayInfo, data string, forceFormat bool, thinkToContent bool) error {
 	info.SendResponseCount++
+
 	switch info.RelayFormat {
 	case relaycommon.RelayFormatOpenAI:
 		return sendStreamData(c, info, data, forceFormat, thinkToContent)
 	case relaycommon.RelayFormatClaude:
 		return handleClaudeFormat(c, data, info)
+	case relaycommon.RelayFormatGemini:
+		return handleGeminiFormat(c, data, info)
 	}
 	return nil
 }
@@ -41,6 +46,46 @@ func handleClaudeFormat(c *gin.Context, data string, info *relaycommon.RelayInfo
 	return nil
 }
 
+func handleGeminiFormat(c *gin.Context, data string, info *relaycommon.RelayInfo) error {
+	// 截取前50个字符用于调试
+	debugData := data
+	if len(data) > 50 {
+		debugData = data[:50] + "..."
+	}
+	common.LogInfo(c, "handleGeminiFormat called with data: "+debugData)
+
+	var streamResponse dto.ChatCompletionsStreamResponse
+	if err := common.Unmarshal(common.StringToByteSlice(data), &streamResponse); err != nil {
+		common.LogError(c, "failed to unmarshal stream response: "+err.Error())
+		return err
+	}
+
+	common.LogInfo(c, "successfully unmarshaled stream response")
+	geminiResponse := service.StreamResponseOpenAI2Gemini(&streamResponse, info)
+
+	// 如果返回 nil，表示没有实际内容，跳过发送
+	if geminiResponse == nil {
+		common.LogInfo(c, "handleGeminiFormat: no content to send, skipping")
+		return nil
+	}
+
+	geminiResponseStr, err := common.Marshal(geminiResponse)
+	if err != nil {
+		common.LogError(c, "failed to marshal gemini response: "+err.Error())
+		return err
+	}
+
+	common.LogInfo(c, "sending gemini format response")
+	// send gemini format response
+	c.Render(-1, common.CustomEvent{Data: "data: " + string(geminiResponseStr)})
+	if flusher, ok := c.Writer.(http.Flusher); ok {
+		flusher.Flush()
+	} else {
+		return errors.New("streaming error: flusher not found")
+	}
+	return nil
+}
+
 func ProcessStreamResponse(streamResponse dto.ChatCompletionsStreamResponse, responseTextBuilder *strings.Builder, toolCount *int) error {
 	for _, choice := range streamResponse.Choices {
 		responseTextBuilder.WriteString(choice.Delta.GetContentString())
@@ -185,6 +230,37 @@ func HandleFinalResponse(c *gin.Context, info *relaycommon.RelayInfo, lastStream
 		for _, resp := range claudeResponses {
 			_ = helper.ClaudeData(c, *resp)
 		}
+
+	case relaycommon.RelayFormatGemini:
+		var streamResponse dto.ChatCompletionsStreamResponse
+		if err := common.Unmarshal(common.StringToByteSlice(lastStreamData), &streamResponse); err != nil {
+			common.SysError("error unmarshalling stream response: " + err.Error())
+			return
+		}
+
+		// 这里处理的是 openai 最后一个流响应，其 delta 为空，有 finish_reason 字段
+		// 因此相比较于 google 官方的流响应，由 openai 转换而来会多一个 parts 为空，finishReason 为 STOP 的响应
+		// 而包含最后一段文本输出的响应（倒数第二个）的 finishReason 为 null
+		// 暂不知是否有程序会不兼容。
+
+		geminiResponse := service.StreamResponseOpenAI2Gemini(&streamResponse, info)
+
+		// openai 流响应开头的空数据
+		if geminiResponse == nil {
+			return
+		}
+
+		geminiResponseStr, err := common.Marshal(geminiResponse)
+		if err != nil {
+			common.SysError("error marshalling gemini response: " + err.Error())
+			return
+		}
+
+		// 发送最终的 Gemini 响应
+		c.Render(-1, common.CustomEvent{Data: "data: " + string(geminiResponseStr)})
+		if flusher, ok := c.Writer.(http.Flusher); ok {
+			flusher.Flush()
+		}
 	}
 }
 

relay/channel/openai/relay-openai.go

@@ -223,6 +223,13 @@ func OpenaiHandler(c *gin.Context, info *relaycommon.RelayInfo, resp *http.Respo
 			return nil, types.NewError(err, types.ErrorCodeBadResponseBody)
 		}
 		responseBody = claudeRespStr
+	case relaycommon.RelayFormatGemini:
+		geminiResp := service.ResponseOpenAI2Gemini(&simpleResponse, info)
+		geminiRespStr, err := common.Marshal(geminiResp)
+		if err != nil {
+			return nil, types.NewError(err, types.ErrorCodeBadResponseBody)
+		}
+		responseBody = geminiRespStr
 	}
 
 	common.IOCopyBytesGracefully(c, resp, responseBody)

relay/channel/palm/adaptor.go

@@ -17,6 +17,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/perplexity/adaptor.go

@@ -17,6 +17,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/siliconflow/adaptor.go

@@ -18,6 +18,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(c *gin.Context, info *relaycommon.RelayInfo, req *dto.ClaudeRequest) (any, error) {
 	adaptor := openai.Adaptor{}
 	return adaptor.ConvertClaudeRequest(c, info, req)

relay/channel/tencent/adaptor.go

@@ -25,6 +25,11 @@ type Adaptor struct {
 	Timestamp int64
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/vertex/adaptor.go

@@ -44,6 +44,10 @@ type Adaptor struct {
 	AccountCredentials Credentials
 }
 
+func (a *Adaptor) ConvertGeminiRequest(c *gin.Context, info *relaycommon.RelayInfo, request *dto.GeminiChatRequest) (any, error) {
+	return request, nil
+}
+
 func (a *Adaptor) ConvertClaudeRequest(c *gin.Context, info *relaycommon.RelayInfo, request *dto.ClaudeRequest) (any, error) {
 	if v, ok := claudeModelMap[info.UpstreamModelName]; ok {
 		c.Set("request_model", v)

relay/channel/volcengine/adaptor.go

@@ -23,6 +23,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/xai/adaptor.go

@@ -19,6 +19,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	//panic("implement me")

relay/channel/xunfei/adaptor.go

@@ -17,6 +17,11 @@ type Adaptor struct {
 	request *dto.GeneralOpenAIRequest
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/zhipu/adaptor.go

@@ -16,6 +16,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/channel/zhipu_4v/adaptor.go

@@ -18,6 +18,11 @@ import (
 type Adaptor struct {
 }
 
+func (a *Adaptor) ConvertGeminiRequest(*gin.Context, *relaycommon.RelayInfo, *dto.GeminiChatRequest) (any, error) {
+	//TODO implement me
+	return nil, errors.New("not implemented")
+}
+
 func (a *Adaptor) ConvertClaudeRequest(*gin.Context, *relaycommon.RelayInfo, *dto.ClaudeRequest) (any, error) {
 	//TODO implement me
 	panic("implement me")

relay/gemini_handler.go

@@ -20,8 +20,8 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
-func getAndValidateGeminiRequest(c *gin.Context) (*gemini.GeminiChatRequest, error) {
-	request := &gemini.GeminiChatRequest{}
+func getAndValidateGeminiRequest(c *gin.Context) (*dto.GeminiChatRequest, error) {
+	request := &dto.GeminiChatRequest{}
 	err := common.UnmarshalBodyReusable(c, request)
 	if err != nil {
 		return nil, err
@@ -44,7 +44,7 @@ func checkGeminiStreamMode(c *gin.Context, relayInfo *relaycommon.RelayInfo) {
 	// }
 }
 
-func checkGeminiInputSensitive(textRequest *gemini.GeminiChatRequest) ([]string, error) {
+func checkGeminiInputSensitive(textRequest *dto.GeminiChatRequest) ([]string, error) {
 	var inputTexts []string
 	for _, content := range textRequest.Contents {
 		for _, part := range content.Parts {
@@ -61,7 +61,7 @@ func checkGeminiInputSensitive(textRequest *gemini.GeminiChatRequest) ([]string,
 	return sensitiveWords, err
 }
 
-func getGeminiInputTokens(req *gemini.GeminiChatRequest, info *relaycommon.RelayInfo) int {
+func getGeminiInputTokens(req *dto.GeminiChatRequest, info *relaycommon.RelayInfo) int {
 	// 计算输入 token 数量
 	var inputTexts []string
 	for _, content := range req.Contents {
@@ -78,7 +78,7 @@ func getGeminiInputTokens(req *gemini.GeminiChatRequest, info *relaycommon.Relay
 	return inputTokens
 }
 
-func isNoThinkingRequest(req *gemini.GeminiChatRequest) bool {
+func isNoThinkingRequest(req *dto.GeminiChatRequest) bool {
 	if req.GenerationConfig.ThinkingConfig != nil && req.GenerationConfig.ThinkingConfig.ThinkingBudget != nil {
 		return *req.GenerationConfig.ThinkingConfig.ThinkingBudget == 0
 	}
@@ -202,7 +202,12 @@ func GeminiHelper(c *gin.Context) (newAPIError *types.NewAPIError) {
 		}
 		requestBody = bytes.NewReader(body)
 	} else {
-		jsonData, err := common.Marshal(req)
+		// 使用 ConvertGeminiRequest 转换请求格式
+		convertedRequest, err := adaptor.ConvertGeminiRequest(c, relayInfo, req)
+		if err != nil {
+			return types.NewError(err, types.ErrorCodeConvertRequestFailed, types.ErrOptionWithSkipRetry())
+		}
+		jsonData, err := common.Marshal(convertedRequest)
 		if err != nil {
 			return types.NewError(err, types.ErrorCodeConvertRequestFailed, types.ErrOptionWithSkipRetry())
 		}

service/convert.go

@@ -448,3 +448,353 @@ func toJSONString(v interface{}) string {
 	}
 	return string(b)
 }
+
+func GeminiToOpenAIRequest(geminiRequest *dto.GeminiChatRequest, info *relaycommon.RelayInfo) (*dto.GeneralOpenAIRequest, error) {
+	openaiRequest := &dto.GeneralOpenAIRequest{
+		Model:  info.UpstreamModelName,
+		Stream: info.IsStream,
+	}
+
+	// 转换 messages
+	var messages []dto.Message
+	for _, content := range geminiRequest.Contents {
+		message := dto.Message{
+			Role: convertGeminiRoleToOpenAI(content.Role),
+		}
+
+		// 处理 parts
+		var mediaContents []dto.MediaContent
+		var toolCalls []dto.ToolCallRequest
+		for _, part := range content.Parts {
+			if part.Text != "" {
+				mediaContent := dto.MediaContent{
+					Type: "text",
+					Text: part.Text,
+				}
+				mediaContents = append(mediaContents, mediaContent)
+			} else if part.InlineData != nil {
+				mediaContent := dto.MediaContent{
+					Type: "image_url",
+					ImageUrl: &dto.MessageImageUrl{
+						Url:      fmt.Sprintf("data:%s;base64,%s", part.InlineData.MimeType, part.InlineData.Data),
+						Detail:   "auto",
+						MimeType: part.InlineData.MimeType,
+					},
+				}
+				mediaContents = append(mediaContents, mediaContent)
+			} else if part.FileData != nil {
+				mediaContent := dto.MediaContent{
+					Type: "image_url",
+					ImageUrl: &dto.MessageImageUrl{
+						Url:      part.FileData.FileUri,
+						Detail:   "auto",
+						MimeType: part.FileData.MimeType,
+					},
+				}
+				mediaContents = append(mediaContents, mediaContent)
+			} else if part.FunctionCall != nil {
+				// 处理 Gemini 的工具调用
+				toolCall := dto.ToolCallRequest{
+					ID:   fmt.Sprintf("call_%d", len(toolCalls)+1), // 生成唯一ID
+					Type: "function",
+					Function: dto.FunctionRequest{
+						Name:      part.FunctionCall.FunctionName,
+						Arguments: toJSONString(part.FunctionCall.Arguments),
+					},
+				}
+				toolCalls = append(toolCalls, toolCall)
+			} else if part.FunctionResponse != nil {
+				// 处理 Gemini 的工具响应，创建单独的 tool 消息
+				toolMessage := dto.Message{
+					Role:       "tool",
+					ToolCallId: fmt.Sprintf("call_%d", len(toolCalls)), // 使用对应的调用ID
+				}
+				toolMessage.SetStringContent(toJSONString(part.FunctionResponse.Response))
+				messages = append(messages, toolMessage)
+			}
+		}
+
+		// 设置消息内容
+		if len(toolCalls) > 0 {
+			// 如果有工具调用，设置工具调用
+			message.SetToolCalls(toolCalls)
+		} else if len(mediaContents) == 1 && mediaContents[0].Type == "text" {
+			// 如果只有一个文本内容，直接设置字符串
+			message.Content = mediaContents[0].Text
+		} else if len(mediaContents) > 0 {
+			// 如果有多个内容或包含媒体，设置为数组
+			message.SetMediaContent(mediaContents)
+		}
+
+		// 只有当消息有内容或工具调用时才添加
+		if len(message.ParseContent()) > 0 || len(message.ToolCalls) > 0 {
+			messages = append(messages, message)
+		}
+	}
+
+	openaiRequest.Messages = messages
+
+	if geminiRequest.GenerationConfig.Temperature != nil {
+		openaiRequest.Temperature = geminiRequest.GenerationConfig.Temperature
+	}
+	if geminiRequest.GenerationConfig.TopP > 0 {
+		openaiRequest.TopP = geminiRequest.GenerationConfig.TopP
+	}
+	if geminiRequest.GenerationConfig.TopK > 0 {
+		openaiRequest.TopK = int(geminiRequest.GenerationConfig.TopK)
+	}
+	if geminiRequest.GenerationConfig.MaxOutputTokens > 0 {
+		openaiRequest.MaxTokens = geminiRequest.GenerationConfig.MaxOutputTokens
+	}
+	// gemini stop sequences 最多 5 个，openai stop 最多 4 个
+	if len(geminiRequest.GenerationConfig.StopSequences) > 0 {
+		openaiRequest.Stop = geminiRequest.GenerationConfig.StopSequences[:4]
+	}
+	if geminiRequest.GenerationConfig.CandidateCount > 0 {
+		openaiRequest.N = geminiRequest.GenerationConfig.CandidateCount
+	}
+
+	// 转换工具调用
+	if len(geminiRequest.Tools) > 0 {
+		var tools []dto.ToolCallRequest
+		for _, tool := range geminiRequest.Tools {
+			if tool.FunctionDeclarations != nil {
+				// 将 Gemini 的 FunctionDeclarations 转换为 OpenAI 的 ToolCallRequest
+				functionDeclarations, ok := tool.FunctionDeclarations.([]dto.FunctionRequest)
+				if ok {
+					for _, function := range functionDeclarations {
+						openAITool := dto.ToolCallRequest{
+							Type: "function",
+							Function: dto.FunctionRequest{
+								Name:        function.Name,
+								Description: function.Description,
+								Parameters:  function.Parameters,
+							},
+						}
+						tools = append(tools, openAITool)
+					}
+				}
+			}
+		}
+		if len(tools) > 0 {
+			openaiRequest.Tools = tools
+		}
+	}
+
+	// gemini system instructions
+	if geminiRequest.SystemInstructions != nil {
+		// 将系统指令作为第一条消息插入
+		systemMessage := dto.Message{
+			Role:    "system",
+			Content: extractTextFromGeminiParts(geminiRequest.SystemInstructions.Parts),
+		}
+		openaiRequest.Messages = append([]dto.Message{systemMessage}, openaiRequest.Messages...)
+	}
+
+	return openaiRequest, nil
+}
+
+func convertGeminiRoleToOpenAI(geminiRole string) string {
+	switch geminiRole {
+	case "user":
+		return "user"
+	case "model":
+		return "assistant"
+	case "function":
+		return "function"
+	default:
+		return "user"
+	}
+}
+
+func extractTextFromGeminiParts(parts []dto.GeminiPart) string {
+	var texts []string
+	for _, part := range parts {
+		if part.Text != "" {
+			texts = append(texts, part.Text)
+		}
+	}
+	return strings.Join(texts, "\n")
+}
+
+// ResponseOpenAI2Gemini 将 OpenAI 响应转换为 Gemini 格式
+func ResponseOpenAI2Gemini(openAIResponse *dto.OpenAITextResponse, info *relaycommon.RelayInfo) *dto.GeminiChatResponse {
+	geminiResponse := &dto.GeminiChatResponse{
+		Candidates: make([]dto.GeminiChatCandidate, 0, len(openAIResponse.Choices)),
+		PromptFeedback: dto.GeminiChatPromptFeedback{
+			SafetyRatings: []dto.GeminiChatSafetyRating{},
+		},
+		UsageMetadata: dto.GeminiUsageMetadata{
+			PromptTokenCount:     openAIResponse.PromptTokens,
+			CandidatesTokenCount: openAIResponse.CompletionTokens,
+			TotalTokenCount:      openAIResponse.PromptTokens + openAIResponse.CompletionTokens,
+		},
+	}
+
+	for _, choice := range openAIResponse.Choices {
+		candidate := dto.GeminiChatCandidate{
+			Index:         int64(choice.Index),
+			SafetyRatings: []dto.GeminiChatSafetyRating{},
+		}
+
+		// 设置结束原因
+		var finishReason string
+		switch choice.FinishReason {
+		case "stop":
+			finishReason = "STOP"
+		case "length":
+			finishReason = "MAX_TOKENS"
+		case "content_filter":
+			finishReason = "SAFETY"
+		case "tool_calls":
+			finishReason = "STOP"
+		default:
+			finishReason = "STOP"
+		}
+		candidate.FinishReason = &finishReason
+
+		// 转换消息内容
+		content := dto.GeminiChatContent{
+			Role:  "model",
+			Parts: make([]dto.GeminiPart, 0),
+		}
+
+		// 处理工具调用
+		toolCalls := choice.Message.ParseToolCalls()
+		if len(toolCalls) > 0 {
+			for _, toolCall := range toolCalls {
+				// 解析参数
+				var args map[string]interface{}
+				if toolCall.Function.Arguments != "" {
+					if err := json.Unmarshal([]byte(toolCall.Function.Arguments), &args); err != nil {
+						args = map[string]interface{}{"arguments": toolCall.Function.Arguments}
+					}
+				} else {
+					args = make(map[string]interface{})
+				}
+
+				part := dto.GeminiPart{
+					FunctionCall: &dto.FunctionCall{
+						FunctionName: toolCall.Function.Name,
+						Arguments:    args,
+					},
+				}
+				content.Parts = append(content.Parts, part)
+			}
+		} else {
+			// 处理文本内容
+			textContent := choice.Message.StringContent()
+			if textContent != "" {
+				part := dto.GeminiPart{
+					Text: textContent,
+				}
+				content.Parts = append(content.Parts, part)
+			}
+		}
+
+		candidate.Content = content
+		geminiResponse.Candidates = append(geminiResponse.Candidates, candidate)
+	}
+
+	return geminiResponse
+}
+
+// StreamResponseOpenAI2Gemini 将 OpenAI 流式响应转换为 Gemini 格式
+func StreamResponseOpenAI2Gemini(openAIResponse *dto.ChatCompletionsStreamResponse, info *relaycommon.RelayInfo) *dto.GeminiChatResponse {
+	// 检查是否有实际内容或结束标志
+	hasContent := false
+	hasFinishReason := false
+	for _, choice := range openAIResponse.Choices {
+		if len(choice.Delta.GetContentString()) > 0 || (choice.Delta.ToolCalls != nil && len(choice.Delta.ToolCalls) > 0) {
+			hasContent = true
+		}
+		if choice.FinishReason != nil {
+			hasFinishReason = true
+		}
+	}
+
+	// 如果没有实际内容且没有结束标志，跳过。主要针对 openai 流响应开头的空数据
+	if !hasContent && !hasFinishReason {
+		return nil
+	}
+
+	geminiResponse := &dto.GeminiChatResponse{
+		Candidates: make([]dto.GeminiChatCandidate, 0, len(openAIResponse.Choices)),
+		PromptFeedback: dto.GeminiChatPromptFeedback{
+			SafetyRatings: []dto.GeminiChatSafetyRating{},
+		},
+		UsageMetadata: dto.GeminiUsageMetadata{
+			PromptTokenCount:     info.PromptTokens,
+			CandidatesTokenCount: 0, // 流式响应中可能没有完整的 usage 信息
+			TotalTokenCount:      info.PromptTokens,
+		},
+	}
+
+	for _, choice := range openAIResponse.Choices {
+		candidate := dto.GeminiChatCandidate{
+			Index:         int64(choice.Index),
+			SafetyRatings: []dto.GeminiChatSafetyRating{},
+		}
+
+		// 设置结束原因
+		if choice.FinishReason != nil {
+			var finishReason string
+			switch *choice.FinishReason {
+			case "stop":
+				finishReason = "STOP"
+			case "length":
+				finishReason = "MAX_TOKENS"
+			case "content_filter":
+				finishReason = "SAFETY"
+			case "tool_calls":
+				finishReason = "STOP"
+			default:
+				finishReason = "STOP"
+			}
+			candidate.FinishReason = &finishReason
+		}
+
+		// 转换消息内容
+		content := dto.GeminiChatContent{
+			Role:  "model",
+			Parts: make([]dto.GeminiPart, 0),
+		}
+
+		// 处理工具调用
+		if choice.Delta.ToolCalls != nil {
+			for _, toolCall := range choice.Delta.ToolCalls {
+				// 解析参数
+				var args map[string]interface{}
+				if toolCall.Function.Arguments != "" {
+					if err := json.Unmarshal([]byte(toolCall.Function.Arguments), &args); err != nil {
+						args = map[string]interface{}{"arguments": toolCall.Function.Arguments}
+					}
+				} else {
+					args = make(map[string]interface{})
+				}
+
+				part := dto.GeminiPart{
+					FunctionCall: &dto.FunctionCall{
+						FunctionName: toolCall.Function.Name,
+						Arguments:    args,
+					},
+				}
+				content.Parts = append(content.Parts, part)
+			}
+		} else {
+			// 处理文本内容
+			textContent := choice.Delta.GetContentString()
+			if textContent != "" {
+				part := dto.GeminiPart{
+					Text: textContent,
+				}
+				content.Parts = append(content.Parts, part)
+			}
+		}
+
+		candidate.Content = content
+		geminiResponse.Candidates = append(geminiResponse.Candidates, candidate)
+	}
+
+	return geminiResponse
+}