592d2d0978
- 新增调度配置：粘性会话排队、兜底排队、负载计算、槽位清理 - 实现账号级等待队列和批量负载查询（Redis Lua 脚本） - 三层选择策略：粘性会话优先 → 负载感知选择 → 兜底排队 - 后台定期清理过期槽位，防止资源泄漏 - 集成到所有网关处理器（Claude/Gemini/OpenAI）
729 lines
24 KiB
Go
729 lines
24 KiB
Go
package handler
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"log"
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"net/http"
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"strings"
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"time"
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"github.com/Wei-Shaw/sub2api/internal/pkg/claude"
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"github.com/Wei-Shaw/sub2api/internal/pkg/openai"
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middleware2 "github.com/Wei-Shaw/sub2api/internal/server/middleware"
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"github.com/Wei-Shaw/sub2api/internal/service"
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"github.com/gin-gonic/gin"
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)
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// GatewayHandler handles API gateway requests
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type GatewayHandler struct {
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gatewayService *service.GatewayService
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geminiCompatService *service.GeminiMessagesCompatService
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antigravityGatewayService *service.AntigravityGatewayService
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userService *service.UserService
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billingCacheService *service.BillingCacheService
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concurrencyHelper *ConcurrencyHelper
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}
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// NewGatewayHandler creates a new GatewayHandler
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func NewGatewayHandler(
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gatewayService *service.GatewayService,
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geminiCompatService *service.GeminiMessagesCompatService,
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antigravityGatewayService *service.AntigravityGatewayService,
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userService *service.UserService,
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concurrencyService *service.ConcurrencyService,
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billingCacheService *service.BillingCacheService,
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) *GatewayHandler {
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return &GatewayHandler{
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gatewayService: gatewayService,
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geminiCompatService: geminiCompatService,
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antigravityGatewayService: antigravityGatewayService,
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userService: userService,
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billingCacheService: billingCacheService,
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concurrencyHelper: NewConcurrencyHelper(concurrencyService, SSEPingFormatClaude),
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}
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}
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// Messages handles Claude API compatible messages endpoint
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// POST /v1/messages
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func (h *GatewayHandler) Messages(c *gin.Context) {
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// 从context获取apiKey和user（ApiKeyAuth中间件已设置）
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apiKey, ok := middleware2.GetApiKeyFromContext(c)
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if !ok {
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h.errorResponse(c, http.StatusUnauthorized, "authentication_error", "Invalid API key")
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return
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}
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subject, ok := middleware2.GetAuthSubjectFromContext(c)
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if !ok {
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h.errorResponse(c, http.StatusInternalServerError, "api_error", "User context not found")
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return
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}
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// 读取请求体
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body, err := io.ReadAll(c.Request.Body)
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if err != nil {
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if maxErr, ok := extractMaxBytesError(err); ok {
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h.errorResponse(c, http.StatusRequestEntityTooLarge, "invalid_request_error", buildBodyTooLargeMessage(maxErr.Limit))
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return
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}
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h.errorResponse(c, http.StatusBadRequest, "invalid_request_error", "Failed to read request body")
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return
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}
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if len(body) == 0 {
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h.errorResponse(c, http.StatusBadRequest, "invalid_request_error", "Request body is empty")
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return
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}
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parsedReq, err := service.ParseGatewayRequest(body)
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if err != nil {
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h.errorResponse(c, http.StatusBadRequest, "invalid_request_error", "Failed to parse request body")
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return
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}
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reqModel := parsedReq.Model
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reqStream := parsedReq.Stream
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// 验证 model 必填
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if reqModel == "" {
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h.errorResponse(c, http.StatusBadRequest, "invalid_request_error", "model is required")
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return
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}
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// Track if we've started streaming (for error handling)
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streamStarted := false
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// 获取订阅信息（可能为nil）- 提前获取用于后续检查
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subscription, _ := middleware2.GetSubscriptionFromContext(c)
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// 0. 检查wait队列是否已满
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maxWait := service.CalculateMaxWait(subject.Concurrency)
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canWait, err := h.concurrencyHelper.IncrementWaitCount(c.Request.Context(), subject.UserID, maxWait)
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if err != nil {
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log.Printf("Increment wait count failed: %v", err)
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// On error, allow request to proceed
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} else if !canWait {
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h.errorResponse(c, http.StatusTooManyRequests, "rate_limit_error", "Too many pending requests, please retry later")
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return
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}
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// 确保在函数退出时减少wait计数
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defer h.concurrencyHelper.DecrementWaitCount(c.Request.Context(), subject.UserID)
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// 1. 首先获取用户并发槽位
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userReleaseFunc, err := h.concurrencyHelper.AcquireUserSlotWithWait(c, subject.UserID, subject.Concurrency, reqStream, &streamStarted)
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if err != nil {
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log.Printf("User concurrency acquire failed: %v", err)
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h.handleConcurrencyError(c, err, "user", streamStarted)
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return
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}
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if userReleaseFunc != nil {
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defer userReleaseFunc()
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}
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// 2. 【新增】Wait后二次检查余额/订阅
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if err := h.billingCacheService.CheckBillingEligibility(c.Request.Context(), apiKey.User, apiKey, apiKey.Group, subscription); err != nil {
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log.Printf("Billing eligibility check failed after wait: %v", err)
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h.handleStreamingAwareError(c, http.StatusForbidden, "billing_error", err.Error(), streamStarted)
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return
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}
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// 计算粘性会话hash
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sessionHash := h.gatewayService.GenerateSessionHash(parsedReq)
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// 获取平台：优先使用强制平台（/antigravity 路由，中间件已设置 request.Context），否则使用分组平台
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platform := ""
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if forcePlatform, ok := middleware2.GetForcePlatformFromContext(c); ok {
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platform = forcePlatform
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} else if apiKey.Group != nil {
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platform = apiKey.Group.Platform
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}
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sessionKey := sessionHash
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if platform == service.PlatformGemini && sessionHash != "" {
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sessionKey = "gemini:" + sessionHash
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}
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if platform == service.PlatformGemini {
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const maxAccountSwitches = 3
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switchCount := 0
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failedAccountIDs := make(map[int64]struct{})
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lastFailoverStatus := 0
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for {
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selection, err := h.gatewayService.SelectAccountWithLoadAwareness(c.Request.Context(), apiKey.GroupID, sessionKey, reqModel, failedAccountIDs)
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if err != nil {
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if len(failedAccountIDs) == 0 {
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h.handleStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "No available accounts: "+err.Error(), streamStarted)
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return
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}
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h.handleFailoverExhausted(c, lastFailoverStatus, streamStarted)
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return
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}
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account := selection.Account
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// 检查预热请求拦截（在账号选择后、转发前检查）
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if account.IsInterceptWarmupEnabled() && isWarmupRequest(body) {
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if selection.Acquired && selection.ReleaseFunc != nil {
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selection.ReleaseFunc()
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}
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if reqStream {
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sendMockWarmupStream(c, reqModel)
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} else {
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sendMockWarmupResponse(c, reqModel)
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}
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return
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}
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// 3. 获取账号并发槽位
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accountReleaseFunc := selection.ReleaseFunc
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var accountWaitRelease func()
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if !selection.Acquired {
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if selection.WaitPlan == nil {
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h.handleStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "No available accounts", streamStarted)
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return
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}
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canWait, err := h.concurrencyHelper.IncrementAccountWaitCount(c.Request.Context(), account.ID, selection.WaitPlan.MaxWaiting)
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if err != nil {
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log.Printf("Increment account wait count failed: %v", err)
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} else if !canWait {
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log.Printf("Account wait queue full: account=%d", account.ID)
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h.handleStreamingAwareError(c, http.StatusTooManyRequests, "rate_limit_error", "Too many pending requests, please retry later", streamStarted)
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return
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}
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accountWaitRelease = func() {
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h.concurrencyHelper.DecrementAccountWaitCount(c.Request.Context(), account.ID)
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}
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accountReleaseFunc, err = h.concurrencyHelper.AcquireAccountSlotWithWaitTimeout(
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c,
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account.ID,
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selection.WaitPlan.MaxConcurrency,
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selection.WaitPlan.Timeout,
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reqStream,
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&streamStarted,
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)
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if err != nil {
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if accountWaitRelease != nil {
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accountWaitRelease()
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}
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log.Printf("Account concurrency acquire failed: %v", err)
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h.handleConcurrencyError(c, err, "account", streamStarted)
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return
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}
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if err := h.gatewayService.BindStickySession(c.Request.Context(), sessionKey, account.ID); err != nil {
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log.Printf("Bind sticky session failed: %v", err)
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}
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}
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// 转发请求 - 根据账号平台分流
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var result *service.ForwardResult
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if account.Platform == service.PlatformAntigravity {
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result, err = h.antigravityGatewayService.ForwardGemini(c.Request.Context(), c, account, reqModel, "generateContent", reqStream, body)
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} else {
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result, err = h.geminiCompatService.Forward(c.Request.Context(), c, account, body)
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}
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if accountReleaseFunc != nil {
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accountReleaseFunc()
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}
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if accountWaitRelease != nil {
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accountWaitRelease()
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}
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if err != nil {
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var failoverErr *service.UpstreamFailoverError
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if errors.As(err, &failoverErr) {
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failedAccountIDs[account.ID] = struct{}{}
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if switchCount >= maxAccountSwitches {
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lastFailoverStatus = failoverErr.StatusCode
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h.handleFailoverExhausted(c, lastFailoverStatus, streamStarted)
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return
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}
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lastFailoverStatus = failoverErr.StatusCode
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switchCount++
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log.Printf("Account %d: upstream error %d, switching account %d/%d", account.ID, failoverErr.StatusCode, switchCount, maxAccountSwitches)
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continue
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}
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// 错误响应已在Forward中处理，这里只记录日志
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log.Printf("Forward request failed: %v", err)
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return
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}
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// 异步记录使用量（subscription已在函数开头获取）
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go func(result *service.ForwardResult, usedAccount *service.Account) {
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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if err := h.gatewayService.RecordUsage(ctx, &service.RecordUsageInput{
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Result: result,
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ApiKey: apiKey,
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User: apiKey.User,
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Account: usedAccount,
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Subscription: subscription,
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}); err != nil {
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log.Printf("Record usage failed: %v", err)
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}
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}(result, account)
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return
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}
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}
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const maxAccountSwitches = 10
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switchCount := 0
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failedAccountIDs := make(map[int64]struct{})
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lastFailoverStatus := 0
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for {
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// 选择支持该模型的账号
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selection, err := h.gatewayService.SelectAccountWithLoadAwareness(c.Request.Context(), apiKey.GroupID, sessionKey, reqModel, failedAccountIDs)
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if err != nil {
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if len(failedAccountIDs) == 0 {
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h.handleStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "No available accounts: "+err.Error(), streamStarted)
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return
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}
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h.handleFailoverExhausted(c, lastFailoverStatus, streamStarted)
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return
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}
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account := selection.Account
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// 检查预热请求拦截（在账号选择后、转发前检查）
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if account.IsInterceptWarmupEnabled() && isWarmupRequest(body) {
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if selection.Acquired && selection.ReleaseFunc != nil {
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selection.ReleaseFunc()
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}
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if reqStream {
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sendMockWarmupStream(c, reqModel)
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} else {
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sendMockWarmupResponse(c, reqModel)
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}
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return
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}
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// 3. 获取账号并发槽位
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accountReleaseFunc := selection.ReleaseFunc
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var accountWaitRelease func()
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if !selection.Acquired {
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if selection.WaitPlan == nil {
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h.handleStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "No available accounts", streamStarted)
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return
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}
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canWait, err := h.concurrencyHelper.IncrementAccountWaitCount(c.Request.Context(), account.ID, selection.WaitPlan.MaxWaiting)
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if err != nil {
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log.Printf("Increment account wait count failed: %v", err)
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} else if !canWait {
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log.Printf("Account wait queue full: account=%d", account.ID)
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h.handleStreamingAwareError(c, http.StatusTooManyRequests, "rate_limit_error", "Too many pending requests, please retry later", streamStarted)
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return
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}
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accountWaitRelease = func() {
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h.concurrencyHelper.DecrementAccountWaitCount(c.Request.Context(), account.ID)
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}
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accountReleaseFunc, err = h.concurrencyHelper.AcquireAccountSlotWithWaitTimeout(
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c,
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account.ID,
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selection.WaitPlan.MaxConcurrency,
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selection.WaitPlan.Timeout,
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reqStream,
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&streamStarted,
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)
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if err != nil {
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if accountWaitRelease != nil {
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accountWaitRelease()
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}
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log.Printf("Account concurrency acquire failed: %v", err)
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h.handleConcurrencyError(c, err, "account", streamStarted)
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return
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}
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if err := h.gatewayService.BindStickySession(c.Request.Context(), sessionKey, account.ID); err != nil {
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log.Printf("Bind sticky session failed: %v", err)
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}
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}
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// 转发请求 - 根据账号平台分流
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var result *service.ForwardResult
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if account.Platform == service.PlatformAntigravity {
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result, err = h.antigravityGatewayService.Forward(c.Request.Context(), c, account, body)
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} else {
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result, err = h.gatewayService.Forward(c.Request.Context(), c, account, parsedReq)
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}
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if accountReleaseFunc != nil {
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accountReleaseFunc()
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}
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if accountWaitRelease != nil {
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accountWaitRelease()
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}
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if err != nil {
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var failoverErr *service.UpstreamFailoverError
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if errors.As(err, &failoverErr) {
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failedAccountIDs[account.ID] = struct{}{}
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if switchCount >= maxAccountSwitches {
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lastFailoverStatus = failoverErr.StatusCode
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h.handleFailoverExhausted(c, lastFailoverStatus, streamStarted)
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return
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}
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lastFailoverStatus = failoverErr.StatusCode
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switchCount++
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log.Printf("Account %d: upstream error %d, switching account %d/%d", account.ID, failoverErr.StatusCode, switchCount, maxAccountSwitches)
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continue
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}
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// 错误响应已在Forward中处理，这里只记录日志
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log.Printf("Forward request failed: %v", err)
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return
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}
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// 异步记录使用量（subscription已在函数开头获取）
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go func(result *service.ForwardResult, usedAccount *service.Account) {
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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if err := h.gatewayService.RecordUsage(ctx, &service.RecordUsageInput{
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Result: result,
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ApiKey: apiKey,
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User: apiKey.User,
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Account: usedAccount,
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Subscription: subscription,
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}); err != nil {
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log.Printf("Record usage failed: %v", err)
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}
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}(result, account)
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return
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}
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}
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// Models handles listing available models
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// GET /v1/models
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// Returns different model lists based on the API key's group platform
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func (h *GatewayHandler) Models(c *gin.Context) {
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apiKey, _ := middleware2.GetApiKeyFromContext(c)
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// Return OpenAI models for OpenAI platform groups
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if apiKey != nil && apiKey.Group != nil && apiKey.Group.Platform == "openai" {
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c.JSON(http.StatusOK, gin.H{
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"object": "list",
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"data": openai.DefaultModels,
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})
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return
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}
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// Default: Claude models
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c.JSON(http.StatusOK, gin.H{
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"object": "list",
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"data": claude.DefaultModels,
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})
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}
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// Usage handles getting account balance for CC Switch integration
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// GET /v1/usage
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func (h *GatewayHandler) Usage(c *gin.Context) {
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apiKey, ok := middleware2.GetApiKeyFromContext(c)
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if !ok {
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h.errorResponse(c, http.StatusUnauthorized, "authentication_error", "Invalid API key")
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return
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}
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subject, ok := middleware2.GetAuthSubjectFromContext(c)
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if !ok {
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h.errorResponse(c, http.StatusUnauthorized, "authentication_error", "Invalid API key")
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return
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}
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// 订阅模式：返回订阅限额信息
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if apiKey.Group != nil && apiKey.Group.IsSubscriptionType() {
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subscription, ok := middleware2.GetSubscriptionFromContext(c)
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if !ok {
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h.errorResponse(c, http.StatusForbidden, "subscription_error", "No active subscription")
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return
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}
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remaining := h.calculateSubscriptionRemaining(apiKey.Group, subscription)
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c.JSON(http.StatusOK, gin.H{
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"isValid": true,
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"planName": apiKey.Group.Name,
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"remaining": remaining,
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"unit": "USD",
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})
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return
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}
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// 余额模式：返回钱包余额
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latestUser, err := h.userService.GetByID(c.Request.Context(), subject.UserID)
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if err != nil {
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h.errorResponse(c, http.StatusInternalServerError, "api_error", "Failed to get user info")
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return
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}
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c.JSON(http.StatusOK, gin.H{
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"isValid": true,
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"planName": "钱包余额",
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"remaining": latestUser.Balance,
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"unit": "USD",
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})
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}
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// calculateSubscriptionRemaining 计算订阅剩余可用额度
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// 逻辑：
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// 1. 如果日/周/月任一限额达到100%，返回0
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// 2. 否则返回所有已配置周期中剩余额度的最小值
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func (h *GatewayHandler) calculateSubscriptionRemaining(group *service.Group, sub *service.UserSubscription) float64 {
|
||
var remainingValues []float64
|
||
|
||
// 检查日限额
|
||
if group.HasDailyLimit() {
|
||
remaining := *group.DailyLimitUSD - sub.DailyUsageUSD
|
||
if remaining <= 0 {
|
||
return 0
|
||
}
|
||
remainingValues = append(remainingValues, remaining)
|
||
}
|
||
|
||
// 检查周限额
|
||
if group.HasWeeklyLimit() {
|
||
remaining := *group.WeeklyLimitUSD - sub.WeeklyUsageUSD
|
||
if remaining <= 0 {
|
||
return 0
|
||
}
|
||
remainingValues = append(remainingValues, remaining)
|
||
}
|
||
|
||
// 检查月限额
|
||
if group.HasMonthlyLimit() {
|
||
remaining := *group.MonthlyLimitUSD - sub.MonthlyUsageUSD
|
||
if remaining <= 0 {
|
||
return 0
|
||
}
|
||
remainingValues = append(remainingValues, remaining)
|
||
}
|
||
|
||
// 如果没有配置任何限额，返回-1表示无限制
|
||
if len(remainingValues) == 0 {
|
||
return -1
|
||
}
|
||
|
||
// 返回最小值
|
||
min := remainingValues[0]
|
||
for _, v := range remainingValues[1:] {
|
||
if v < min {
|
||
min = v
|
||
}
|
||
}
|
||
return min
|
||
}
|
||
|
||
// handleConcurrencyError handles concurrency-related errors with proper 429 response
|
||
func (h *GatewayHandler) handleConcurrencyError(c *gin.Context, err error, slotType string, streamStarted bool) {
|
||
h.handleStreamingAwareError(c, http.StatusTooManyRequests, "rate_limit_error",
|
||
fmt.Sprintf("Concurrency limit exceeded for %s, please retry later", slotType), streamStarted)
|
||
}
|
||
|
||
func (h *GatewayHandler) handleFailoverExhausted(c *gin.Context, statusCode int, streamStarted bool) {
|
||
status, errType, errMsg := h.mapUpstreamError(statusCode)
|
||
h.handleStreamingAwareError(c, status, errType, errMsg, streamStarted)
|
||
}
|
||
|
||
func (h *GatewayHandler) mapUpstreamError(statusCode int) (int, string, string) {
|
||
switch statusCode {
|
||
case 401:
|
||
return http.StatusBadGateway, "upstream_error", "Upstream authentication failed, please contact administrator"
|
||
case 403:
|
||
return http.StatusBadGateway, "upstream_error", "Upstream access forbidden, please contact administrator"
|
||
case 429:
|
||
return http.StatusTooManyRequests, "rate_limit_error", "Upstream rate limit exceeded, please retry later"
|
||
case 529:
|
||
return http.StatusServiceUnavailable, "overloaded_error", "Upstream service overloaded, please retry later"
|
||
case 500, 502, 503, 504:
|
||
return http.StatusBadGateway, "upstream_error", "Upstream service temporarily unavailable"
|
||
default:
|
||
return http.StatusBadGateway, "upstream_error", "Upstream request failed"
|
||
}
|
||
}
|
||
|
||
// handleStreamingAwareError handles errors that may occur after streaming has started
|
||
func (h *GatewayHandler) handleStreamingAwareError(c *gin.Context, status int, errType, message string, streamStarted bool) {
|
||
if streamStarted {
|
||
// Stream already started, send error as SSE event then close
|
||
flusher, ok := c.Writer.(http.Flusher)
|
||
if ok {
|
||
// Send error event in SSE format
|
||
errorEvent := fmt.Sprintf(`data: {"type": "error", "error": {"type": "%s", "message": "%s"}}`+"\n\n", errType, message)
|
||
if _, err := fmt.Fprint(c.Writer, errorEvent); err != nil {
|
||
_ = c.Error(err)
|
||
}
|
||
flusher.Flush()
|
||
}
|
||
return
|
||
}
|
||
|
||
// Normal case: return JSON response with proper status code
|
||
h.errorResponse(c, status, errType, message)
|
||
}
|
||
|
||
// errorResponse 返回Claude API格式的错误响应
|
||
func (h *GatewayHandler) errorResponse(c *gin.Context, status int, errType, message string) {
|
||
c.JSON(status, gin.H{
|
||
"type": "error",
|
||
"error": gin.H{
|
||
"type": errType,
|
||
"message": message,
|
||
},
|
||
})
|
||
}
|
||
|
||
// CountTokens handles token counting endpoint
|
||
// POST /v1/messages/count_tokens
|
||
// 特点：校验订阅/余额，但不计算并发、不记录使用量
|
||
func (h *GatewayHandler) CountTokens(c *gin.Context) {
|
||
// 从context获取apiKey和user（ApiKeyAuth中间件已设置）
|
||
apiKey, ok := middleware2.GetApiKeyFromContext(c)
|
||
if !ok {
|
||
h.errorResponse(c, http.StatusUnauthorized, "authentication_error", "Invalid API key")
|
||
return
|
||
}
|
||
|
||
_, ok = middleware2.GetAuthSubjectFromContext(c)
|
||
if !ok {
|
||
h.errorResponse(c, http.StatusInternalServerError, "api_error", "User context not found")
|
||
return
|
||
}
|
||
|
||
// 读取请求体
|
||
body, err := io.ReadAll(c.Request.Body)
|
||
if err != nil {
|
||
if maxErr, ok := extractMaxBytesError(err); ok {
|
||
h.errorResponse(c, http.StatusRequestEntityTooLarge, "invalid_request_error", buildBodyTooLargeMessage(maxErr.Limit))
|
||
return
|
||
}
|
||
h.errorResponse(c, http.StatusBadRequest, "invalid_request_error", "Failed to read request body")
|
||
return
|
||
}
|
||
|
||
if len(body) == 0 {
|
||
h.errorResponse(c, http.StatusBadRequest, "invalid_request_error", "Request body is empty")
|
||
return
|
||
}
|
||
|
||
parsedReq, err := service.ParseGatewayRequest(body)
|
||
if err != nil {
|
||
h.errorResponse(c, http.StatusBadRequest, "invalid_request_error", "Failed to parse request body")
|
||
return
|
||
}
|
||
|
||
// 验证 model 必填
|
||
if parsedReq.Model == "" {
|
||
h.errorResponse(c, http.StatusBadRequest, "invalid_request_error", "model is required")
|
||
return
|
||
}
|
||
|
||
// 获取订阅信息（可能为nil）
|
||
subscription, _ := middleware2.GetSubscriptionFromContext(c)
|
||
|
||
// 校验 billing eligibility（订阅/余额）
|
||
// 【注意】不计算并发，但需要校验订阅/余额
|
||
if err := h.billingCacheService.CheckBillingEligibility(c.Request.Context(), apiKey.User, apiKey, apiKey.Group, subscription); err != nil {
|
||
h.errorResponse(c, http.StatusForbidden, "billing_error", err.Error())
|
||
return
|
||
}
|
||
|
||
// 计算粘性会话 hash
|
||
sessionHash := h.gatewayService.GenerateSessionHash(parsedReq)
|
||
|
||
// 选择支持该模型的账号
|
||
account, err := h.gatewayService.SelectAccountForModel(c.Request.Context(), apiKey.GroupID, sessionHash, parsedReq.Model)
|
||
if err != nil {
|
||
h.errorResponse(c, http.StatusServiceUnavailable, "api_error", "No available accounts: "+err.Error())
|
||
return
|
||
}
|
||
|
||
// 转发请求（不记录使用量）
|
||
if err := h.gatewayService.ForwardCountTokens(c.Request.Context(), c, account, parsedReq); err != nil {
|
||
log.Printf("Forward count_tokens request failed: %v", err)
|
||
// 错误响应已在 ForwardCountTokens 中处理
|
||
return
|
||
}
|
||
}
|
||
|
||
// isWarmupRequest 检测是否为预热请求（标题生成、Warmup等）
|
||
func isWarmupRequest(body []byte) bool {
|
||
// 快速检查：如果body不包含关键字，直接返回false
|
||
bodyStr := string(body)
|
||
if !strings.Contains(bodyStr, "title") && !strings.Contains(bodyStr, "Warmup") {
|
||
return false
|
||
}
|
||
|
||
// 解析完整请求
|
||
var req struct {
|
||
Messages []struct {
|
||
Content []struct {
|
||
Type string `json:"type"`
|
||
Text string `json:"text"`
|
||
} `json:"content"`
|
||
} `json:"messages"`
|
||
System []struct {
|
||
Text string `json:"text"`
|
||
} `json:"system"`
|
||
}
|
||
if err := json.Unmarshal(body, &req); err != nil {
|
||
return false
|
||
}
|
||
|
||
// 检查 messages 中的标题提示模式
|
||
for _, msg := range req.Messages {
|
||
for _, content := range msg.Content {
|
||
if content.Type == "text" {
|
||
if strings.Contains(content.Text, "Please write a 5-10 word title for the following conversation:") ||
|
||
content.Text == "Warmup" {
|
||
return true
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// 检查 system 中的标题提取模式
|
||
for _, system := range req.System {
|
||
if strings.Contains(system.Text, "nalyze if this message indicates a new conversation topic. If it does, extract a 2-3 word title") {
|
||
return true
|
||
}
|
||
}
|
||
|
||
return false
|
||
}
|
||
|
||
// sendMockWarmupStream 发送流式 mock 响应（用于预热请求拦截）
|
||
func sendMockWarmupStream(c *gin.Context, model string) {
|
||
c.Header("Content-Type", "text/event-stream")
|
||
c.Header("Cache-Control", "no-cache")
|
||
c.Header("Connection", "keep-alive")
|
||
c.Header("X-Accel-Buffering", "no")
|
||
|
||
events := []string{
|
||
`event: message_start` + "\n" + `data: {"message":{"content":[],"id":"msg_mock_warmup","model":"` + model + `","role":"assistant","stop_reason":null,"stop_sequence":null,"type":"message","usage":{"input_tokens":10,"output_tokens":0}},"type":"message_start"}`,
|
||
`event: content_block_start` + "\n" + `data: {"content_block":{"text":"","type":"text"},"index":0,"type":"content_block_start"}`,
|
||
`event: content_block_delta` + "\n" + `data: {"delta":{"text":"New","type":"text_delta"},"index":0,"type":"content_block_delta"}`,
|
||
`event: content_block_delta` + "\n" + `data: {"delta":{"text":" Conversation","type":"text_delta"},"index":0,"type":"content_block_delta"}`,
|
||
`event: content_block_stop` + "\n" + `data: {"index":0,"type":"content_block_stop"}`,
|
||
`event: message_delta` + "\n" + `data: {"delta":{"stop_reason":"end_turn","stop_sequence":null},"type":"message_delta","usage":{"input_tokens":10,"output_tokens":2}}`,
|
||
`event: message_stop` + "\n" + `data: {"type":"message_stop"}`,
|
||
}
|
||
|
||
for _, event := range events {
|
||
_, _ = c.Writer.WriteString(event + "\n\n")
|
||
c.Writer.Flush()
|
||
time.Sleep(20 * time.Millisecond)
|
||
}
|
||
}
|
||
|
||
// sendMockWarmupResponse 发送非流式 mock 响应（用于预热请求拦截）
|
||
func sendMockWarmupResponse(c *gin.Context, model string) {
|
||
c.JSON(http.StatusOK, gin.H{
|
||
"id": "msg_mock_warmup",
|
||
"type": "message",
|
||
"role": "assistant",
|
||
"model": model,
|
||
"content": []gin.H{{"type": "text", "text": "New Conversation"}},
|
||
"stop_reason": "end_turn",
|
||
"usage": gin.H{
|
||
"input_tokens": 10,
|
||
"output_tokens": 2,
|
||
},
|
||
})
|
||
}
|