mirror of
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323 lines
9.5 KiB
Go
323 lines
9.5 KiB
Go
package gemini
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import (
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"bufio"
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"encoding/json"
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"fmt"
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"github.com/gin-gonic/gin"
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"io"
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"net/http"
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"one-api/common"
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"one-api/dto"
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relaycommon "one-api/relay/common"
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"one-api/service"
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"strings"
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)
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// Setting safety to the lowest possible values since Gemini is already powerless enough
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func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest) *GeminiChatRequest {
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geminiRequest := GeminiChatRequest{
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Contents: make([]GeminiChatContent, 0, len(textRequest.Messages)),
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SafetySettings: []GeminiChatSafetySettings{
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{
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Category: "HARM_CATEGORY_HARASSMENT",
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Threshold: common.GeminiSafetySetting,
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},
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{
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Category: "HARM_CATEGORY_HATE_SPEECH",
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Threshold: common.GeminiSafetySetting,
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},
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{
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Category: "HARM_CATEGORY_SEXUALLY_EXPLICIT",
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Threshold: common.GeminiSafetySetting,
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},
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{
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Category: "HARM_CATEGORY_DANGEROUS_CONTENT",
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Threshold: common.GeminiSafetySetting,
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},
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},
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GenerationConfig: GeminiChatGenerationConfig{
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Temperature: textRequest.Temperature,
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TopP: textRequest.TopP,
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MaxOutputTokens: textRequest.MaxTokens,
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},
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}
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if textRequest.Tools != nil {
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functions := make([]dto.FunctionCall, 0, len(textRequest.Tools))
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for _, tool := range textRequest.Tools {
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functions = append(functions, tool.Function)
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}
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geminiRequest.Tools = []GeminiChatTools{
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{
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FunctionDeclarations: functions,
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},
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}
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} else if textRequest.Functions != nil {
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geminiRequest.Tools = []GeminiChatTools{
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{
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FunctionDeclarations: textRequest.Functions,
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},
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}
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}
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shouldAddDummyModelMessage := false
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for _, message := range textRequest.Messages {
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content := GeminiChatContent{
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Role: message.Role,
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Parts: []GeminiPart{
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{
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Text: message.StringContent(),
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},
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},
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}
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openaiContent := message.ParseContent()
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var parts []GeminiPart
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imageNum := 0
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for _, part := range openaiContent {
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if part.Type == dto.ContentTypeText {
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parts = append(parts, GeminiPart{
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Text: part.Text,
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})
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} else if part.Type == dto.ContentTypeImageURL {
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imageNum += 1
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if imageNum > GeminiVisionMaxImageNum {
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continue
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}
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// 判断是否是url
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if strings.HasPrefix(part.ImageUrl.(dto.MessageImageUrl).Url, "http") {
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// 是url，获取图片的类型和base64编码的数据
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mimeType, data, _ := common.GetImageFromUrl(part.ImageUrl.(dto.MessageImageUrl).Url)
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parts = append(parts, GeminiPart{
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InlineData: &GeminiInlineData{
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MimeType: mimeType,
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Data: data,
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},
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})
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} else {
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_, format, base64String, err := common.DecodeBase64ImageData(part.ImageUrl.(dto.MessageImageUrl).Url)
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if err != nil {
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continue
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}
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parts = append(parts, GeminiPart{
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InlineData: &GeminiInlineData{
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MimeType: "image/" + format,
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Data: base64String,
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},
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})
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}
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}
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}
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content.Parts = parts
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// there's no assistant role in gemini and API shall vomit if Role is not user or model
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if content.Role == "assistant" {
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content.Role = "model"
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}
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// Converting system prompt to prompt from user for the same reason
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if content.Role == "system" {
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content.Role = "user"
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shouldAddDummyModelMessage = true
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}
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geminiRequest.Contents = append(geminiRequest.Contents, content)
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// If a system message is the last message, we need to add a dummy model message to make gemini happy
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if shouldAddDummyModelMessage {
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geminiRequest.Contents = append(geminiRequest.Contents, GeminiChatContent{
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Role: "model",
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Parts: []GeminiPart{
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{
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Text: "Okay",
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},
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},
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})
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shouldAddDummyModelMessage = false
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}
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}
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return &geminiRequest
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}
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func (g *GeminiChatResponse) GetResponseText() string {
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if g == nil {
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return ""
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}
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if len(g.Candidates) > 0 && len(g.Candidates[0].Content.Parts) > 0 {
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return g.Candidates[0].Content.Parts[0].Text
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}
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return ""
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}
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func getToolCalls(candidate *GeminiChatCandidate) []dto.ToolCall {
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var toolCalls []dto.ToolCall
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item := candidate.Content.Parts[0]
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if item.FunctionCall == nil {
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return toolCalls
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}
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argsBytes, err := json.Marshal(item.FunctionCall.Arguments)
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if err != nil {
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//common.SysError("getToolCalls failed: " + err.Error())
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return toolCalls
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}
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toolCall := dto.ToolCall{
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ID: fmt.Sprintf("call_%s", common.GetUUID()),
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Type: "function",
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Function: dto.FunctionCall{
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Arguments: string(argsBytes),
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Name: item.FunctionCall.FunctionName,
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},
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}
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toolCalls = append(toolCalls, toolCall)
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return toolCalls
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}
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func responseGeminiChat2OpenAI(response *GeminiChatResponse) *dto.OpenAITextResponse {
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fullTextResponse := dto.OpenAITextResponse{
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Id: fmt.Sprintf("chatcmpl-%s", common.GetUUID()),
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Object: "chat.completion",
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Created: common.GetTimestamp(),
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Choices: make([]dto.OpenAITextResponseChoice, 0, len(response.Candidates)),
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}
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content, _ := json.Marshal("")
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for i, candidate := range response.Candidates {
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choice := dto.OpenAITextResponseChoice{
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Index: i,
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Message: dto.Message{
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Role: "assistant",
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Content: content,
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},
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FinishReason: relaycommon.StopFinishReason,
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}
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if len(candidate.Content.Parts) > 0 {
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if candidate.Content.Parts[0].FunctionCall != nil {
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choice.Message.ToolCalls = getToolCalls(&candidate)
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} else {
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choice.Message.SetStringContent(candidate.Content.Parts[0].Text)
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}
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}
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fullTextResponse.Choices = append(fullTextResponse.Choices, choice)
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}
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return &fullTextResponse
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}
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func streamResponseGeminiChat2OpenAI(geminiResponse *GeminiChatResponse) *dto.ChatCompletionsStreamResponse {
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var choice dto.ChatCompletionsStreamResponseChoice
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//choice.Delta.SetContentString(geminiResponse.GetResponseText())
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if len(geminiResponse.Candidates) > 0 && len(geminiResponse.Candidates[0].Content.Parts) > 0 {
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respFirst := geminiResponse.Candidates[0].Content.Parts[0]
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if respFirst.FunctionCall != nil {
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// function response
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choice.Delta.ToolCalls = getToolCalls(&geminiResponse.Candidates[0])
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} else {
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// text response
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choice.Delta.SetContentString(respFirst.Text)
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}
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}
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var response dto.ChatCompletionsStreamResponse
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response.Object = "chat.completion.chunk"
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response.Model = "gemini"
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response.Choices = []dto.ChatCompletionsStreamResponseChoice{choice}
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return &response
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}
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func GeminiChatStreamHandler(c *gin.Context, resp *http.Response, info *relaycommon.RelayInfo) (*dto.OpenAIErrorWithStatusCode, *dto.Usage) {
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responseText := ""
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id := fmt.Sprintf("chatcmpl-%s", common.GetUUID())
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createAt := common.GetTimestamp()
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var usage = &dto.Usage{}
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scanner := bufio.NewScanner(resp.Body)
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scanner.Split(bufio.ScanLines)
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service.SetEventStreamHeaders(c)
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for scanner.Scan() {
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data := scanner.Text()
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info.SetFirstResponseTime()
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data = strings.TrimSpace(data)
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if !strings.HasPrefix(data, "data: ") {
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continue
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}
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data = strings.TrimPrefix(data, "data: ")
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data = strings.TrimSuffix(data, "\"")
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var geminiResponse GeminiChatResponse
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err := json.Unmarshal([]byte(data), &geminiResponse)
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if err != nil {
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common.LogError(c, "error unmarshalling stream response: "+err.Error())
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continue
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}
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response := streamResponseGeminiChat2OpenAI(&geminiResponse)
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if response == nil {
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continue
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}
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response.Id = id
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response.Created = createAt
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responseText += response.Choices[0].Delta.GetContentString()
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if geminiResponse.UsageMetadata.TotalTokenCount != 0 {
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usage.PromptTokens = geminiResponse.UsageMetadata.PromptTokenCount
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usage.CompletionTokens = geminiResponse.UsageMetadata.CandidatesTokenCount
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}
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err = service.ObjectData(c, response)
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if err != nil {
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common.LogError(c, err.Error())
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}
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}
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response := service.GenerateStopResponse(id, createAt, info.UpstreamModelName, relaycommon.StopFinishReason)
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service.ObjectData(c, response)
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usage.TotalTokens = usage.PromptTokens + usage.CompletionTokens
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if info.ShouldIncludeUsage {
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response = service.GenerateFinalUsageResponse(id, createAt, info.UpstreamModelName, *usage)
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err := service.ObjectData(c, response)
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if err != nil {
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common.SysError("send final response failed: " + err.Error())
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}
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}
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service.Done(c)
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resp.Body.Close()
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return nil, usage
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}
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func GeminiChatHandler(c *gin.Context, resp *http.Response) (*dto.OpenAIErrorWithStatusCode, *dto.Usage) {
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responseBody, err := io.ReadAll(resp.Body)
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if err != nil {
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return service.OpenAIErrorWrapper(err, "read_response_body_failed", http.StatusInternalServerError), nil
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}
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err = resp.Body.Close()
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if err != nil {
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return service.OpenAIErrorWrapper(err, "close_response_body_failed", http.StatusInternalServerError), nil
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}
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var geminiResponse GeminiChatResponse
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err = json.Unmarshal(responseBody, &geminiResponse)
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if err != nil {
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return service.OpenAIErrorWrapper(err, "unmarshal_response_body_failed", http.StatusInternalServerError), nil
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}
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if len(geminiResponse.Candidates) == 0 {
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return &dto.OpenAIErrorWithStatusCode{
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Error: dto.OpenAIError{
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Message: "No candidates returned",
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Type: "server_error",
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Param: "",
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Code: 500,
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},
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StatusCode: resp.StatusCode,
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}, nil
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}
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fullTextResponse := responseGeminiChat2OpenAI(&geminiResponse)
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usage := dto.Usage{
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PromptTokens: geminiResponse.UsageMetadata.PromptTokenCount,
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CompletionTokens: geminiResponse.UsageMetadata.CandidatesTokenCount,
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TotalTokens: geminiResponse.UsageMetadata.TotalTokenCount,
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}
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fullTextResponse.Usage = usage
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jsonResponse, err := json.Marshal(fullTextResponse)
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if err != nil {
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return service.OpenAIErrorWrapper(err, "marshal_response_body_failed", http.StatusInternalServerError), nil
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}
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c.Writer.Header().Set("Content-Type", "application/json")
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c.Writer.WriteHeader(resp.StatusCode)
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_, err = c.Writer.Write(jsonResponse)
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return nil, &usage
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}
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