mirror of
https://github.com/router-for-me/CLIProxyAPI.git
synced 2026-02-02 20:40:52 +08:00
266 lines
8.6 KiB
Go
266 lines
8.6 KiB
Go
// Package openai provides HTTP handlers for OpenAIResponses API endpoints.
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// This package implements the OpenAIResponses-compatible API interface, including model listing
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// and chat completion functionality. It supports both streaming and non-streaming responses,
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// and manages a pool of clients to interact with backend services.
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// The handlers translate OpenAIResponses API requests to the appropriate backend format and
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// convert responses back to OpenAIResponses-compatible format.
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package openai
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import (
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"bytes"
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"context"
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"fmt"
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"net/http"
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"github.com/gin-gonic/gin"
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. "github.com/router-for-me/CLIProxyAPI/v6/internal/constant"
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"github.com/router-for-me/CLIProxyAPI/v6/internal/interfaces"
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"github.com/router-for-me/CLIProxyAPI/v6/internal/registry"
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"github.com/router-for-me/CLIProxyAPI/v6/sdk/api/handlers"
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"github.com/tidwall/gjson"
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)
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// OpenAIResponsesAPIHandler contains the handlers for OpenAIResponses API endpoints.
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// It holds a pool of clients to interact with the backend service.
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type OpenAIResponsesAPIHandler struct {
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*handlers.BaseAPIHandler
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}
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// NewOpenAIResponsesAPIHandler creates a new OpenAIResponses API handlers instance.
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// It takes an BaseAPIHandler instance as input and returns an OpenAIResponsesAPIHandler.
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//
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// Parameters:
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// - apiHandlers: The base API handlers instance
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//
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// Returns:
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// - *OpenAIResponsesAPIHandler: A new OpenAIResponses API handlers instance
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func NewOpenAIResponsesAPIHandler(apiHandlers *handlers.BaseAPIHandler) *OpenAIResponsesAPIHandler {
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return &OpenAIResponsesAPIHandler{
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BaseAPIHandler: apiHandlers,
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}
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}
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// HandlerType returns the identifier for this handler implementation.
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func (h *OpenAIResponsesAPIHandler) HandlerType() string {
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return OpenaiResponse
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}
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// Models returns the OpenAIResponses-compatible model metadata supported by this handler.
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func (h *OpenAIResponsesAPIHandler) Models() []map[string]any {
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// Get dynamic models from the global registry
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modelRegistry := registry.GetGlobalRegistry()
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return modelRegistry.GetAvailableModels("openai")
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}
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// OpenAIResponsesModels handles the /v1/models endpoint.
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// It returns a list of available AI models with their capabilities
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// and specifications in OpenAIResponses-compatible format.
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func (h *OpenAIResponsesAPIHandler) OpenAIResponsesModels(c *gin.Context) {
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c.JSON(http.StatusOK, gin.H{
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"object": "list",
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"data": h.Models(),
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})
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}
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// Responses handles the /v1/responses endpoint.
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// It determines whether the request is for a streaming or non-streaming response
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// and calls the appropriate handler based on the model provider.
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//
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// Parameters:
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// - c: The Gin context containing the HTTP request and response
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func (h *OpenAIResponsesAPIHandler) Responses(c *gin.Context) {
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rawJSON, err := c.GetRawData()
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// If data retrieval fails, return a 400 Bad Request error.
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if err != nil {
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c.JSON(http.StatusBadRequest, handlers.ErrorResponse{
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Error: handlers.ErrorDetail{
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Message: fmt.Sprintf("Invalid request: %v", err),
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Type: "invalid_request_error",
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},
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})
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return
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}
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// Check if the client requested a streaming response.
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streamResult := gjson.GetBytes(rawJSON, "stream")
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if streamResult.Type == gjson.True {
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h.handleStreamingResponse(c, rawJSON)
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} else {
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h.handleNonStreamingResponse(c, rawJSON)
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}
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}
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func (h *OpenAIResponsesAPIHandler) Compact(c *gin.Context) {
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rawJSON, err := c.GetRawData()
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if err != nil {
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c.JSON(http.StatusBadRequest, handlers.ErrorResponse{
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Error: handlers.ErrorDetail{
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Message: fmt.Sprintf("Invalid request: %v", err),
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Type: "invalid_request_error",
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},
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})
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return
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}
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streamResult := gjson.GetBytes(rawJSON, "stream")
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if streamResult.Type == gjson.True {
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c.JSON(http.StatusBadRequest, handlers.ErrorResponse{
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Error: handlers.ErrorDetail{
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Message: "Streaming not supported for compact responses",
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Type: "invalid_request_error",
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},
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})
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return
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}
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c.Header("Content-Type", "application/json")
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modelName := gjson.GetBytes(rawJSON, "model").String()
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cliCtx, cliCancel := h.GetContextWithCancel(h, c, context.Background())
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stopKeepAlive := h.StartNonStreamingKeepAlive(c, cliCtx)
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resp, errMsg := h.ExecuteWithAuthManager(cliCtx, h.HandlerType(), modelName, rawJSON, "responses/compact")
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stopKeepAlive()
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if errMsg != nil {
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h.WriteErrorResponse(c, errMsg)
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cliCancel(errMsg.Error)
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return
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}
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_, _ = c.Writer.Write(resp)
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cliCancel()
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}
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// handleNonStreamingResponse handles non-streaming chat completion responses
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// for Gemini models. It selects a client from the pool, sends the request, and
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// aggregates the response before sending it back to the client in OpenAIResponses format.
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//
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// Parameters:
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// - c: The Gin context containing the HTTP request and response
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// - rawJSON: The raw JSON bytes of the OpenAIResponses-compatible request
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func (h *OpenAIResponsesAPIHandler) handleNonStreamingResponse(c *gin.Context, rawJSON []byte) {
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c.Header("Content-Type", "application/json")
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modelName := gjson.GetBytes(rawJSON, "model").String()
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cliCtx, cliCancel := h.GetContextWithCancel(h, c, context.Background())
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stopKeepAlive := h.StartNonStreamingKeepAlive(c, cliCtx)
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resp, errMsg := h.ExecuteWithAuthManager(cliCtx, h.HandlerType(), modelName, rawJSON, "")
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stopKeepAlive()
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if errMsg != nil {
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h.WriteErrorResponse(c, errMsg)
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cliCancel(errMsg.Error)
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return
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}
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_, _ = c.Writer.Write(resp)
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cliCancel()
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}
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// handleStreamingResponse handles streaming responses for Gemini models.
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// It establishes a streaming connection with the backend service and forwards
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// the response chunks to the client in real-time using Server-Sent Events.
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//
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// Parameters:
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// - c: The Gin context containing the HTTP request and response
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// - rawJSON: The raw JSON bytes of the OpenAIResponses-compatible request
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func (h *OpenAIResponsesAPIHandler) handleStreamingResponse(c *gin.Context, rawJSON []byte) {
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// Get the http.Flusher interface to manually flush the response.
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flusher, ok := c.Writer.(http.Flusher)
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if !ok {
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c.JSON(http.StatusInternalServerError, handlers.ErrorResponse{
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Error: handlers.ErrorDetail{
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Message: "Streaming not supported",
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Type: "server_error",
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},
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})
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return
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}
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// New core execution path
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modelName := gjson.GetBytes(rawJSON, "model").String()
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cliCtx, cliCancel := h.GetContextWithCancel(h, c, context.Background())
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dataChan, errChan := h.ExecuteStreamWithAuthManager(cliCtx, h.HandlerType(), modelName, rawJSON, "")
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setSSEHeaders := func() {
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c.Header("Content-Type", "text/event-stream")
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c.Header("Cache-Control", "no-cache")
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c.Header("Connection", "keep-alive")
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c.Header("Access-Control-Allow-Origin", "*")
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}
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// Peek at the first chunk
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for {
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select {
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case <-c.Request.Context().Done():
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cliCancel(c.Request.Context().Err())
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return
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case errMsg, ok := <-errChan:
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if !ok {
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// Err channel closed cleanly; wait for data channel.
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errChan = nil
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continue
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}
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// Upstream failed immediately. Return proper error status and JSON.
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h.WriteErrorResponse(c, errMsg)
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if errMsg != nil {
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cliCancel(errMsg.Error)
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} else {
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cliCancel(nil)
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}
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return
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case chunk, ok := <-dataChan:
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if !ok {
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// Stream closed without data? Send headers and done.
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setSSEHeaders()
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_, _ = c.Writer.Write([]byte("\n"))
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flusher.Flush()
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cliCancel(nil)
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return
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}
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// Success! Set headers.
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setSSEHeaders()
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// Write first chunk logic (matching forwardResponsesStream)
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if bytes.HasPrefix(chunk, []byte("event:")) {
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_, _ = c.Writer.Write([]byte("\n"))
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}
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_, _ = c.Writer.Write(chunk)
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_, _ = c.Writer.Write([]byte("\n"))
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flusher.Flush()
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// Continue
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h.forwardResponsesStream(c, flusher, func(err error) { cliCancel(err) }, dataChan, errChan)
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return
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}
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}
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}
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func (h *OpenAIResponsesAPIHandler) forwardResponsesStream(c *gin.Context, flusher http.Flusher, cancel func(error), data <-chan []byte, errs <-chan *interfaces.ErrorMessage) {
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h.ForwardStream(c, flusher, cancel, data, errs, handlers.StreamForwardOptions{
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WriteChunk: func(chunk []byte) {
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if bytes.HasPrefix(chunk, []byte("event:")) {
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_, _ = c.Writer.Write([]byte("\n"))
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}
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_, _ = c.Writer.Write(chunk)
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_, _ = c.Writer.Write([]byte("\n"))
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},
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WriteTerminalError: func(errMsg *interfaces.ErrorMessage) {
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if errMsg == nil {
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return
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}
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status := http.StatusInternalServerError
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if errMsg.StatusCode > 0 {
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status = errMsg.StatusCode
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}
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errText := http.StatusText(status)
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if errMsg.Error != nil && errMsg.Error.Error() != "" {
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errText = errMsg.Error.Error()
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}
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body := handlers.BuildErrorResponseBody(status, errText)
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_, _ = fmt.Fprintf(c.Writer, "\nevent: error\ndata: %s\n\n", string(body))
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},
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WriteDone: func() {
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_, _ = c.Writer.Write([]byte("\n"))
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},
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})
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}
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