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234
relay/gemini_handler.go
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234
relay/gemini_handler.go
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package relay
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"one-api/common"
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"one-api/dto"
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"one-api/relay/channel/gemini"
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relaycommon "one-api/relay/common"
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"one-api/relay/helper"
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"one-api/service"
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"one-api/setting"
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"one-api/setting/model_setting"
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"one-api/types"
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"strings"
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"github.com/gin-gonic/gin"
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)
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func getAndValidateGeminiRequest(c *gin.Context) (*gemini.GeminiChatRequest, error) {
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request := &gemini.GeminiChatRequest{}
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err := common.UnmarshalBodyReusable(c, request)
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if err != nil {
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return nil, err
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}
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if len(request.Contents) == 0 {
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return nil, errors.New("contents is required")
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}
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return request, nil
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}
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// 流模式
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// /v1beta/models/gemini-2.0-flash:streamGenerateContent?alt=sse&key=xxx
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func checkGeminiStreamMode(c *gin.Context, relayInfo *relaycommon.RelayInfo) {
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if c.Query("alt") == "sse" {
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relayInfo.IsStream = true
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}
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// if strings.Contains(c.Request.URL.Path, "streamGenerateContent") {
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// relayInfo.IsStream = true
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// }
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}
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func checkGeminiInputSensitive(textRequest *gemini.GeminiChatRequest) ([]string, error) {
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var inputTexts []string
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for _, content := range textRequest.Contents {
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for _, part := range content.Parts {
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if part.Text != "" {
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inputTexts = append(inputTexts, part.Text)
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}
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}
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}
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if len(inputTexts) == 0 {
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return nil, nil
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}
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sensitiveWords, err := service.CheckSensitiveInput(inputTexts)
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return sensitiveWords, err
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}
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func getGeminiInputTokens(req *gemini.GeminiChatRequest, info *relaycommon.RelayInfo) int {
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// 计算输入 token 数量
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var inputTexts []string
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for _, content := range req.Contents {
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for _, part := range content.Parts {
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if part.Text != "" {
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inputTexts = append(inputTexts, part.Text)
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}
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}
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}
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inputText := strings.Join(inputTexts, "\n")
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inputTokens := service.CountTokenInput(inputText, info.UpstreamModelName)
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info.PromptTokens = inputTokens
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return inputTokens
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}
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func isNoThinkingRequest(req *gemini.GeminiChatRequest) bool {
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if req.GenerationConfig.ThinkingConfig != nil && req.GenerationConfig.ThinkingConfig.ThinkingBudget != nil {
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return *req.GenerationConfig.ThinkingConfig.ThinkingBudget <= 0
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}
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return false
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}
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func trimModelThinking(modelName string) string {
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// 去除模型名称中的 -nothinking 后缀
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if strings.HasSuffix(modelName, "-nothinking") {
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return strings.TrimSuffix(modelName, "-nothinking")
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}
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// 去除模型名称中的 -thinking 后缀
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if strings.HasSuffix(modelName, "-thinking") {
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return strings.TrimSuffix(modelName, "-thinking")
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}
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// 去除模型名称中的 -thinking-number
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if strings.Contains(modelName, "-thinking-") {
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parts := strings.Split(modelName, "-thinking-")
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if len(parts) > 1 {
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return parts[0] + "-thinking"
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}
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}
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return modelName
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}
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func GeminiHelper(c *gin.Context) (newAPIError *types.NewAPIError) {
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req, err := getAndValidateGeminiRequest(c)
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if err != nil {
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common.LogError(c, fmt.Sprintf("getAndValidateGeminiRequest error: %s", err.Error()))
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return types.NewError(err, types.ErrorCodeInvalidRequest)
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}
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relayInfo := relaycommon.GenRelayInfoGemini(c)
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// 检查 Gemini 流式模式
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checkGeminiStreamMode(c, relayInfo)
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if setting.ShouldCheckPromptSensitive() {
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sensitiveWords, err := checkGeminiInputSensitive(req)
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if err != nil {
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common.LogWarn(c, fmt.Sprintf("user sensitive words detected: %s", strings.Join(sensitiveWords, ", ")))
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return types.NewError(err, types.ErrorCodeSensitiveWordsDetected)
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}
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}
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// model mapped 模型映射
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err = helper.ModelMappedHelper(c, relayInfo, req)
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if err != nil {
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return types.NewError(err, types.ErrorCodeChannelModelMappedError)
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}
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if value, exists := c.Get("prompt_tokens"); exists {
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promptTokens := value.(int)
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relayInfo.SetPromptTokens(promptTokens)
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} else {
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promptTokens := getGeminiInputTokens(req, relayInfo)
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c.Set("prompt_tokens", promptTokens)
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}
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if model_setting.GetGeminiSettings().ThinkingAdapterEnabled {
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if isNoThinkingRequest(req) {
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// check is thinking
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if !strings.Contains(relayInfo.OriginModelName, "-nothinking") {
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// try to get no thinking model price
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noThinkingModelName := relayInfo.OriginModelName + "-nothinking"
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containPrice := helper.ContainPriceOrRatio(noThinkingModelName)
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if containPrice {
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relayInfo.OriginModelName = noThinkingModelName
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relayInfo.UpstreamModelName = noThinkingModelName
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}
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}
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}
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if req.GenerationConfig.ThinkingConfig == nil {
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gemini.ThinkingAdaptor(req, relayInfo)
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}
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}
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priceData, err := helper.ModelPriceHelper(c, relayInfo, relayInfo.PromptTokens, int(req.GenerationConfig.MaxOutputTokens))
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if err != nil {
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return types.NewError(err, types.ErrorCodeModelPriceError)
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}
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// pre consume quota
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preConsumedQuota, userQuota, newAPIError := preConsumeQuota(c, priceData.ShouldPreConsumedQuota, relayInfo)
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if newAPIError != nil {
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return newAPIError
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}
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defer func() {
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if newAPIError != nil {
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returnPreConsumedQuota(c, relayInfo, userQuota, preConsumedQuota)
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}
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}()
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adaptor := GetAdaptor(relayInfo.ApiType)
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if adaptor == nil {
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return types.NewError(fmt.Errorf("invalid api type: %d", relayInfo.ApiType), types.ErrorCodeInvalidApiType)
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}
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adaptor.Init(relayInfo)
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// Clean up empty system instruction
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if req.SystemInstructions != nil {
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hasContent := false
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for _, part := range req.SystemInstructions.Parts {
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if part.Text != "" {
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hasContent = true
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break
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}
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}
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if !hasContent {
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req.SystemInstructions = nil
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}
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}
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requestBody, err := json.Marshal(req)
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if err != nil {
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return types.NewError(err, types.ErrorCodeConvertRequestFailed)
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}
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if common.DebugEnabled {
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println("Gemini request body: %s", string(requestBody))
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}
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resp, err := adaptor.DoRequest(c, relayInfo, bytes.NewReader(requestBody))
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if err != nil {
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common.LogError(c, "Do gemini request failed: "+err.Error())
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return types.NewError(err, types.ErrorCodeDoRequestFailed)
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}
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statusCodeMappingStr := c.GetString("status_code_mapping")
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var httpResp *http.Response
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if resp != nil {
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httpResp = resp.(*http.Response)
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relayInfo.IsStream = relayInfo.IsStream || strings.HasPrefix(httpResp.Header.Get("Content-Type"), "text/event-stream")
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if httpResp.StatusCode != http.StatusOK {
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newAPIError = service.RelayErrorHandler(httpResp, false)
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// reset status code 重置状态码
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service.ResetStatusCode(newAPIError, statusCodeMappingStr)
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return newAPIError
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}
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}
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usage, openaiErr := adaptor.DoResponse(c, resp.(*http.Response), relayInfo)
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if openaiErr != nil {
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service.ResetStatusCode(openaiErr, statusCodeMappingStr)
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return openaiErr
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}
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postConsumeQuota(c, relayInfo, usage.(*dto.Usage), preConsumedQuota, userQuota, priceData, "")
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return nil
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}
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