mirror of
https://github.com/router-for-me/CLIProxyAPI.git
synced 2026-02-03 04:50:52 +08:00
Refactor codebase
This commit is contained in:
Luis Pater
268
internal/api/handlers/gemini/gemini-cli_handlers.go
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268
internal/api/handlers/gemini/gemini-cli_handlers.go
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@@ -0,0 +1,268 @@
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// Package gemini provides HTTP handlers for Gemini CLI API functionality.
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// This package implements handlers that process CLI-specific requests for Gemini API operations,
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// including content generation and streaming content generation endpoints.
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// The handlers restrict access to localhost only and manage communication with the backend service.
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package gemini
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import (
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"bytes"
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"context"
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"fmt"
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"io"
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"net/http"
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"strings"
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"time"
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"github.com/gin-gonic/gin"
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"github.com/luispater/CLIProxyAPI/internal/api/handlers"
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. "github.com/luispater/CLIProxyAPI/internal/constant"
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"github.com/luispater/CLIProxyAPI/internal/interfaces"
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"github.com/luispater/CLIProxyAPI/internal/util"
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log "github.com/sirupsen/logrus"
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"github.com/tidwall/gjson"
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)
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// GeminiCLIAPIHandler contains the handlers for Gemini CLI API endpoints.
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// It holds a pool of clients to interact with the backend service.
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type GeminiCLIAPIHandler struct {
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*handlers.BaseAPIHandler
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}
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// NewGeminiCLIAPIHandler creates a new Gemini CLI API handlers instance.
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// It takes an BaseAPIHandler instance as input and returns a GeminiCLIAPIHandler.
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func NewGeminiCLIAPIHandler(apiHandlers *handlers.BaseAPIHandler) *GeminiCLIAPIHandler {
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return &GeminiCLIAPIHandler{
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BaseAPIHandler: apiHandlers,
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}
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}
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// HandlerType returns the type of this handler.
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func (h *GeminiCLIAPIHandler) HandlerType() string {
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return GEMINICLI
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}
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// Models returns a list of models supported by this handler.
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func (h *GeminiCLIAPIHandler) Models() []map[string]any {
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return make([]map[string]any, 0)
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}
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// CLIHandler handles CLI-specific requests for Gemini API operations.
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// It restricts access to localhost only and routes requests to appropriate internal handlers.
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func (h *GeminiCLIAPIHandler) CLIHandler(c *gin.Context) {
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if !strings.HasPrefix(c.Request.RemoteAddr, "127.0.0.1:") {
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c.JSON(http.StatusForbidden, handlers.ErrorResponse{
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Error: handlers.ErrorDetail{
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Message: "CLI reply only allow local access",
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Type: "forbidden",
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},
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})
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return
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}
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rawJSON, _ := c.GetRawData()
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requestRawURI := c.Request.URL.Path
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if requestRawURI == "/v1internal:generateContent" {
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h.handleInternalGenerateContent(c, rawJSON)
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} else if requestRawURI == "/v1internal:streamGenerateContent" {
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h.handleInternalStreamGenerateContent(c, rawJSON)
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} else {
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reqBody := bytes.NewBuffer(rawJSON)
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req, err := http.NewRequest("POST", fmt.Sprintf("https://cloudcode-pa.googleapis.com%s", c.Request.URL.RequestURI()), reqBody)
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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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for key, value := range c.Request.Header {
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req.Header[key] = value
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}
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httpClient := util.SetProxy(h.Cfg, &http.Client{})
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resp, err := httpClient.Do(req)
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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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if resp.StatusCode < 200 || resp.StatusCode >= 300 {
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defer func() {
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if err = resp.Body.Close(); err != nil {
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log.Printf("warn: failed to close response body: %v", err)
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}
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}()
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bodyBytes, _ := io.ReadAll(resp.Body)
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c.JSON(http.StatusBadRequest, handlers.ErrorResponse{
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Error: handlers.ErrorDetail{
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Message: string(bodyBytes),
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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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defer func() {
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_ = resp.Body.Close()
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}()
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for key, value := range resp.Header {
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c.Header(key, value[0])
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}
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output, err := io.ReadAll(resp.Body)
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if err != nil {
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log.Errorf("Failed to read response body: %v", err)
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return
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}
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_, _ = c.Writer.Write(output)
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c.Set("API_RESPONSE", output)
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}
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}
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// handleInternalStreamGenerateContent handles streaming content generation requests.
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// It sets up a server-sent event stream and forwards the request to the backend client.
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// The function continuously proxies response chunks from the backend to the client.
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func (h *GeminiCLIAPIHandler) handleInternalStreamGenerateContent(c *gin.Context, rawJSON []byte) {
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alt := h.GetAlt(c)
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if alt == "" {
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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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// 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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modelResult := gjson.GetBytes(rawJSON, "model")
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modelName := modelResult.String()
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cliCtx, cliCancel := h.GetContextWithCancel(h, c, context.Background())
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var cliClient interfaces.Client
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defer func() {
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// Ensure the client's mutex is unlocked on function exit.
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if cliClient != nil {
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cliClient.GetRequestMutex().Unlock()
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}
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}()
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outLoop:
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for {
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var errorResponse *interfaces.ErrorMessage
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cliClient, errorResponse = h.GetClient(modelName)
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if errorResponse != nil {
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c.Status(errorResponse.StatusCode)
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_, _ = fmt.Fprint(c.Writer, errorResponse.Error.Error())
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flusher.Flush()
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cliCancel()
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return
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}
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// Send the message and receive response chunks and errors via channels.
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respChan, errChan := cliClient.SendRawMessageStream(cliCtx, modelName, rawJSON, "")
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for {
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select {
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// Handle client disconnection.
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case <-c.Request.Context().Done():
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if c.Request.Context().Err().Error() == "context canceled" {
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log.Debugf("Client disconnected: %v", c.Request.Context().Err())
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cliCancel() // Cancel the backend request.
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return
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}
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// Process incoming response chunks.
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case chunk, okStream := <-respChan:
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if !okStream {
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cliCancel()
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return
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}
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_, _ = c.Writer.Write([]byte("data: "))
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_, _ = c.Writer.Write(chunk)
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_, _ = c.Writer.Write([]byte("\n\n"))
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flusher.Flush()
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// Handle errors from the backend.
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case err, okError := <-errChan:
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if okError {
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if err.StatusCode == 429 && h.Cfg.QuotaExceeded.SwitchProject {
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continue outLoop
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} else {
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c.Status(err.StatusCode)
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_, _ = fmt.Fprint(c.Writer, err.Error.Error())
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flusher.Flush()
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cliCancel(err.Error)
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}
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return
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}
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// Send a keep-alive signal to the client.
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case <-time.After(500 * time.Millisecond):
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}
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}
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}
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}
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// handleInternalGenerateContent handles non-streaming content generation requests.
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// It sends a request to the backend client and proxies the entire response back to the client at once.
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func (h *GeminiCLIAPIHandler) handleInternalGenerateContent(c *gin.Context, rawJSON []byte) {
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c.Header("Content-Type", "application/json")
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modelResult := gjson.GetBytes(rawJSON, "model")
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modelName := modelResult.String()
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cliCtx, cliCancel := h.GetContextWithCancel(h, c, context.Background())
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var cliClient interfaces.Client
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defer func() {
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if cliClient != nil {
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cliClient.GetRequestMutex().Unlock()
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}
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}()
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for {
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var errorResponse *interfaces.ErrorMessage
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cliClient, errorResponse = h.GetClient(modelName)
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if errorResponse != nil {
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c.Status(errorResponse.StatusCode)
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_, _ = fmt.Fprint(c.Writer, errorResponse.Error.Error())
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cliCancel()
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return
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}
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resp, err := cliClient.SendRawMessage(cliCtx, modelName, rawJSON, "")
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if err != nil {
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if err.StatusCode == 429 && h.Cfg.QuotaExceeded.SwitchProject {
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continue
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} else {
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c.Status(err.StatusCode)
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_, _ = c.Writer.Write([]byte(err.Error.Error()))
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// log.Debugf("code: %d, error: %s", err.StatusCode, err.Error.Error())
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cliCancel(err.Error)
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}
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break
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} else {
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_, _ = c.Writer.Write(resp)
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cliCancel(resp)
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break
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}
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}
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}
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