440b87094a
- 在 failover 场景透传上游响应头并识别 Cloudflare challenge/cf-ray - 统一 Sora 任务请求的 UA 与代理使用，sentinel 与业务请求保持一致 - 修复流式错误事件 JSON 转义问题并补充相关单元测试
644 lines
21 KiB
Go
644 lines
21 KiB
Go
package handler
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import (
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"context"
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"crypto/sha256"
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"encoding/hex"
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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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"net/http"
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"os"
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"path"
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"path/filepath"
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"regexp"
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"strconv"
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"strings"
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"time"
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"github.com/Wei-Shaw/sub2api/internal/config"
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"github.com/Wei-Shaw/sub2api/internal/pkg/ip"
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"github.com/Wei-Shaw/sub2api/internal/pkg/logger"
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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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"github.com/tidwall/gjson"
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"github.com/tidwall/sjson"
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"go.uber.org/zap"
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)
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var soraCloudflareRayPattern = regexp.MustCompile(`(?i)cf-ray[:\s=]+([a-z0-9-]+)`)
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// SoraGatewayHandler handles Sora chat completions requests
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type SoraGatewayHandler struct {
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gatewayService *service.GatewayService
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soraGatewayService *service.SoraGatewayService
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billingCacheService *service.BillingCacheService
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concurrencyHelper *ConcurrencyHelper
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maxAccountSwitches int
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streamMode string
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soraMediaSigningKey string
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soraMediaRoot string
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}
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// NewSoraGatewayHandler creates a new SoraGatewayHandler
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func NewSoraGatewayHandler(
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gatewayService *service.GatewayService,
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soraGatewayService *service.SoraGatewayService,
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concurrencyService *service.ConcurrencyService,
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billingCacheService *service.BillingCacheService,
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cfg *config.Config,
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) *SoraGatewayHandler {
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pingInterval := time.Duration(0)
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maxAccountSwitches := 3
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streamMode := "force"
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signKey := ""
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mediaRoot := "/app/data/sora"
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if cfg != nil {
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pingInterval = time.Duration(cfg.Concurrency.PingInterval) * time.Second
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if cfg.Gateway.MaxAccountSwitches > 0 {
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maxAccountSwitches = cfg.Gateway.MaxAccountSwitches
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}
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if mode := strings.TrimSpace(cfg.Gateway.SoraStreamMode); mode != "" {
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streamMode = mode
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}
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signKey = strings.TrimSpace(cfg.Gateway.SoraMediaSigningKey)
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if root := strings.TrimSpace(cfg.Sora.Storage.LocalPath); root != "" {
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mediaRoot = root
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}
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}
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return &SoraGatewayHandler{
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gatewayService: gatewayService,
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soraGatewayService: soraGatewayService,
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billingCacheService: billingCacheService,
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concurrencyHelper: NewConcurrencyHelper(concurrencyService, SSEPingFormatComment, pingInterval),
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maxAccountSwitches: maxAccountSwitches,
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streamMode: strings.ToLower(streamMode),
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soraMediaSigningKey: signKey,
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soraMediaRoot: mediaRoot,
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}
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}
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// ChatCompletions handles Sora /v1/chat/completions endpoint
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func (h *SoraGatewayHandler) ChatCompletions(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.StatusInternalServerError, "api_error", "User context not found")
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return
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}
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reqLog := requestLogger(
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c,
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"handler.sora_gateway.chat_completions",
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zap.Int64("user_id", subject.UserID),
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zap.Int64("api_key_id", apiKey.ID),
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zap.Any("group_id", apiKey.GroupID),
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)
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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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setOpsRequestContext(c, "", false, body)
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// 校验请求体 JSON 合法性
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if !gjson.ValidBytes(body) {
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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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// 使用 gjson 只读提取字段做校验，避免完整 Unmarshal
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modelResult := gjson.GetBytes(body, "model")
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if !modelResult.Exists() || modelResult.Type != gjson.String || modelResult.String() == "" {
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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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reqModel := modelResult.String()
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msgsResult := gjson.GetBytes(body, "messages")
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if !msgsResult.IsArray() || len(msgsResult.Array()) == 0 {
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h.errorResponse(c, http.StatusBadRequest, "invalid_request_error", "messages is required")
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return
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}
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clientStream := gjson.GetBytes(body, "stream").Bool()
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reqLog = reqLog.With(zap.String("model", reqModel), zap.Bool("stream", clientStream))
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if !clientStream {
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if h.streamMode == "error" {
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h.errorResponse(c, http.StatusBadRequest, "invalid_request_error", "Sora requires stream=true")
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return
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}
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var err error
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body, err = sjson.SetBytes(body, "stream", true)
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if err != nil {
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h.errorResponse(c, http.StatusInternalServerError, "api_error", "Failed to process request")
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return
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}
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}
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setOpsRequestContext(c, reqModel, clientStream, body)
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platform := ""
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if forced, ok := middleware2.GetForcePlatformFromContext(c); ok {
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platform = forced
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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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if platform != service.PlatformSora {
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h.errorResponse(c, http.StatusBadRequest, "invalid_request_error", "This endpoint only supports Sora platform")
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return
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}
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streamStarted := false
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subscription, _ := middleware2.GetSubscriptionFromContext(c)
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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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waitCounted := false
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if err != nil {
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reqLog.Warn("sora.user_wait_counter_increment_failed", zap.Error(err))
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} else if !canWait {
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reqLog.Info("sora.user_wait_queue_full", zap.Int("max_wait", maxWait))
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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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if err == nil && canWait {
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waitCounted = true
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}
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defer func() {
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if waitCounted {
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h.concurrencyHelper.DecrementWaitCount(c.Request.Context(), subject.UserID)
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}
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}()
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userReleaseFunc, err := h.concurrencyHelper.AcquireUserSlotWithWait(c, subject.UserID, subject.Concurrency, clientStream, &streamStarted)
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if err != nil {
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reqLog.Warn("sora.user_slot_acquire_failed", zap.Error(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 waitCounted {
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h.concurrencyHelper.DecrementWaitCount(c.Request.Context(), subject.UserID)
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waitCounted = false
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}
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userReleaseFunc = wrapReleaseOnDone(c.Request.Context(), userReleaseFunc)
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if userReleaseFunc != nil {
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defer userReleaseFunc()
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}
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if err := h.billingCacheService.CheckBillingEligibility(c.Request.Context(), apiKey.User, apiKey, apiKey.Group, subscription); err != nil {
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reqLog.Info("sora.billing_eligibility_check_failed", zap.Error(err))
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status, code, message := billingErrorDetails(err)
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h.handleStreamingAwareError(c, status, code, message, streamStarted)
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return
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}
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sessionHash := generateOpenAISessionHash(c, body)
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maxAccountSwitches := h.maxAccountSwitches
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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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var lastFailoverBody []byte
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var lastFailoverHeaders http.Header
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for {
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selection, err := h.gatewayService.SelectAccountWithLoadAwareness(c.Request.Context(), apiKey.GroupID, sessionHash, reqModel, failedAccountIDs, "")
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if err != nil {
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reqLog.Warn("sora.account_select_failed",
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zap.Error(err),
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zap.Int("excluded_account_count", len(failedAccountIDs)),
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)
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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, lastFailoverHeaders, lastFailoverBody, streamStarted)
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return
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}
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account := selection.Account
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setOpsSelectedAccount(c, account.ID, account.Platform)
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accountReleaseFunc := selection.ReleaseFunc
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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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accountWaitCounted := false
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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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reqLog.Warn("sora.account_wait_counter_increment_failed", zap.Int64("account_id", account.ID), zap.Error(err))
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} else if !canWait {
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reqLog.Info("sora.account_wait_queue_full",
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zap.Int64("account_id", account.ID),
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zap.Int("max_waiting", selection.WaitPlan.MaxWaiting),
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)
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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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if err == nil && canWait {
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accountWaitCounted = true
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}
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defer func() {
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if accountWaitCounted {
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h.concurrencyHelper.DecrementAccountWaitCount(c.Request.Context(), account.ID)
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}
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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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clientStream,
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&streamStarted,
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)
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if err != nil {
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reqLog.Warn("sora.account_slot_acquire_failed", zap.Int64("account_id", account.ID), zap.Error(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 accountWaitCounted {
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h.concurrencyHelper.DecrementAccountWaitCount(c.Request.Context(), account.ID)
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accountWaitCounted = false
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}
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}
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accountReleaseFunc = wrapReleaseOnDone(c.Request.Context(), accountReleaseFunc)
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result, err := h.soraGatewayService.Forward(c.Request.Context(), c, account, body, clientStream)
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if accountReleaseFunc != nil {
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accountReleaseFunc()
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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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lastFailoverHeaders = failoverErr.ResponseHeaders
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lastFailoverBody = failoverErr.ResponseBody
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h.handleFailoverExhausted(c, lastFailoverStatus, lastFailoverHeaders, lastFailoverBody, streamStarted)
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return
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}
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lastFailoverStatus = failoverErr.StatusCode
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lastFailoverHeaders = failoverErr.ResponseHeaders
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lastFailoverBody = failoverErr.ResponseBody
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switchCount++
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upstreamErrCode, upstreamErrMsg := extractUpstreamErrorCodeAndMessage(lastFailoverBody)
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reqLog.Warn("sora.upstream_failover_switching",
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zap.Int64("account_id", account.ID),
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zap.Int("upstream_status", failoverErr.StatusCode),
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zap.String("upstream_error_code", upstreamErrCode),
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zap.String("upstream_error_message", upstreamErrMsg),
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zap.Int("switch_count", switchCount),
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zap.Int("max_switches", maxAccountSwitches),
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)
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continue
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}
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reqLog.Error("sora.forward_failed", zap.Int64("account_id", account.ID), zap.Error(err))
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return
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}
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userAgent := c.GetHeader("User-Agent")
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clientIP := ip.GetClientIP(c)
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go func(result *service.ForwardResult, usedAccount *service.Account, ua, ip string) {
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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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UserAgent: ua,
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IPAddress: ip,
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}); err != nil {
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logger.L().With(
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zap.String("component", "handler.sora_gateway.chat_completions"),
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zap.Int64("user_id", subject.UserID),
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zap.Int64("api_key_id", apiKey.ID),
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zap.Any("group_id", apiKey.GroupID),
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zap.String("model", reqModel),
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zap.Int64("account_id", usedAccount.ID),
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).Error("sora.record_usage_failed", zap.Error(err))
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}
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}(result, account, userAgent, clientIP)
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reqLog.Debug("sora.request_completed",
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zap.Int64("account_id", account.ID),
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zap.Int("switch_count", switchCount),
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)
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return
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}
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}
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func generateOpenAISessionHash(c *gin.Context, body []byte) string {
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if c == nil {
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return ""
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}
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sessionID := strings.TrimSpace(c.GetHeader("session_id"))
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if sessionID == "" {
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sessionID = strings.TrimSpace(c.GetHeader("conversation_id"))
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}
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if sessionID == "" && len(body) > 0 {
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sessionID = strings.TrimSpace(gjson.GetBytes(body, "prompt_cache_key").String())
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}
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if sessionID == "" {
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return ""
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}
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hash := sha256.Sum256([]byte(sessionID))
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return hex.EncodeToString(hash[:])
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}
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func (h *SoraGatewayHandler) handleConcurrencyError(c *gin.Context, err error, slotType string, streamStarted bool) {
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h.handleStreamingAwareError(c, http.StatusTooManyRequests, "rate_limit_error",
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fmt.Sprintf("Concurrency limit exceeded for %s, please retry later", slotType), streamStarted)
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}
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func (h *SoraGatewayHandler) handleFailoverExhausted(c *gin.Context, statusCode int, responseHeaders http.Header, responseBody []byte, streamStarted bool) {
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status, errType, errMsg := h.mapUpstreamError(statusCode, responseHeaders, responseBody)
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h.handleStreamingAwareError(c, status, errType, errMsg, streamStarted)
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}
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func (h *SoraGatewayHandler) mapUpstreamError(statusCode int, responseHeaders http.Header, responseBody []byte) (int, string, string) {
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if isSoraCloudflareChallengeResponse(statusCode, responseHeaders, responseBody) {
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baseMsg := fmt.Sprintf("Sora request blocked by Cloudflare challenge (HTTP %d). Please switch to a clean proxy/network and retry.", statusCode)
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return http.StatusBadGateway, "upstream_error", formatSoraCloudflareChallengeMessage(baseMsg, responseHeaders, responseBody)
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}
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upstreamCode, upstreamMessage := extractUpstreamErrorCodeAndMessage(responseBody)
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if shouldPassthroughSoraUpstreamMessage(statusCode, upstreamMessage) {
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switch statusCode {
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case 401, 403, 404, 500, 502, 503, 504:
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return http.StatusBadGateway, "upstream_error", upstreamMessage
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case 429:
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return http.StatusTooManyRequests, "rate_limit_error", upstreamMessage
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}
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}
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switch statusCode {
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case 401:
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return http.StatusBadGateway, "upstream_error", "Upstream authentication failed, please contact administrator"
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case 403:
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return http.StatusBadGateway, "upstream_error", "Upstream access forbidden, please contact administrator"
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case 404:
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if strings.EqualFold(upstreamCode, "unsupported_country_code") {
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return http.StatusBadGateway, "upstream_error", "Upstream region capability unavailable for this account, please contact administrator"
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}
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return http.StatusBadGateway, "upstream_error", "Upstream capability unavailable for this account, please contact administrator"
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case 429:
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return http.StatusTooManyRequests, "rate_limit_error", "Upstream rate limit exceeded, please retry later"
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case 529:
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return http.StatusServiceUnavailable, "upstream_error", "Upstream service overloaded, please retry later"
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case 500, 502, 503, 504:
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return http.StatusBadGateway, "upstream_error", "Upstream service temporarily unavailable"
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default:
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return http.StatusBadGateway, "upstream_error", "Upstream request failed"
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}
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}
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func isSoraCloudflareChallengeResponse(statusCode int, headers http.Header, body []byte) bool {
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if statusCode != http.StatusForbidden && statusCode != http.StatusTooManyRequests {
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return false
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}
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if strings.EqualFold(strings.TrimSpace(headers.Get("cf-mitigated")), "challenge") {
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return true
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}
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preview := strings.ToLower(truncateSoraErrorBody(body, 4096))
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if strings.Contains(preview, "window._cf_chl_opt") ||
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strings.Contains(preview, "just a moment") ||
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strings.Contains(preview, "enable javascript and cookies to continue") ||
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strings.Contains(preview, "__cf_chl_") ||
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strings.Contains(preview, "challenge-platform") {
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return true
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}
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contentType := strings.ToLower(strings.TrimSpace(headers.Get("content-type")))
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if strings.Contains(contentType, "text/html") &&
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(strings.Contains(preview, "<html") || strings.Contains(preview, "<!doctype html")) &&
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(strings.Contains(preview, "cloudflare") || strings.Contains(preview, "challenge")) {
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return true
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}
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return false
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}
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func shouldPassthroughSoraUpstreamMessage(statusCode int, message string) bool {
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message = strings.TrimSpace(message)
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if message == "" {
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return false
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}
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if statusCode == http.StatusForbidden || statusCode == http.StatusTooManyRequests {
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lower := strings.ToLower(message)
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if strings.Contains(lower, "<html") || strings.Contains(lower, "<!doctype html") || strings.Contains(lower, "window._cf_chl_opt") {
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return false
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}
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}
|
|
return true
|
|
}
|
|
|
|
func formatSoraCloudflareChallengeMessage(base string, headers http.Header, body []byte) string {
|
|
rayID := extractSoraCloudflareRayID(headers, body)
|
|
if rayID == "" {
|
|
return base
|
|
}
|
|
return fmt.Sprintf("%s (cf-ray: %s)", base, rayID)
|
|
}
|
|
|
|
func extractSoraCloudflareRayID(headers http.Header, body []byte) string {
|
|
if headers != nil {
|
|
rayID := strings.TrimSpace(headers.Get("cf-ray"))
|
|
if rayID != "" {
|
|
return rayID
|
|
}
|
|
rayID = strings.TrimSpace(headers.Get("Cf-Ray"))
|
|
if rayID != "" {
|
|
return rayID
|
|
}
|
|
}
|
|
preview := truncateSoraErrorBody(body, 8192)
|
|
matches := soraCloudflareRayPattern.FindStringSubmatch(preview)
|
|
if len(matches) >= 2 {
|
|
return strings.TrimSpace(matches[1])
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func extractUpstreamErrorCodeAndMessage(body []byte) (string, string) {
|
|
trimmed := strings.TrimSpace(string(body))
|
|
if trimmed == "" {
|
|
return "", ""
|
|
}
|
|
if !gjson.Valid(trimmed) {
|
|
return "", truncateSoraErrorMessage(trimmed, 256)
|
|
}
|
|
code := strings.TrimSpace(gjson.Get(trimmed, "error.code").String())
|
|
if code == "" {
|
|
code = strings.TrimSpace(gjson.Get(trimmed, "code").String())
|
|
}
|
|
message := strings.TrimSpace(gjson.Get(trimmed, "error.message").String())
|
|
if message == "" {
|
|
message = strings.TrimSpace(gjson.Get(trimmed, "message").String())
|
|
}
|
|
if message == "" {
|
|
message = strings.TrimSpace(gjson.Get(trimmed, "error.detail").String())
|
|
}
|
|
if message == "" {
|
|
message = strings.TrimSpace(gjson.Get(trimmed, "detail").String())
|
|
}
|
|
return code, truncateSoraErrorMessage(message, 512)
|
|
}
|
|
|
|
func truncateSoraErrorMessage(s string, maxLen int) string {
|
|
if maxLen <= 0 {
|
|
return ""
|
|
}
|
|
if len(s) <= maxLen {
|
|
return s
|
|
}
|
|
return s[:maxLen] + "...(truncated)"
|
|
}
|
|
|
|
func truncateSoraErrorBody(body []byte, maxLen int) string {
|
|
if maxLen <= 0 {
|
|
maxLen = 512
|
|
}
|
|
raw := strings.TrimSpace(string(body))
|
|
if len(raw) <= maxLen {
|
|
return raw
|
|
}
|
|
return raw[:maxLen] + "...(truncated)"
|
|
}
|
|
|
|
func (h *SoraGatewayHandler) handleStreamingAwareError(c *gin.Context, status int, errType, message string, streamStarted bool) {
|
|
if streamStarted {
|
|
flusher, ok := c.Writer.(http.Flusher)
|
|
if ok {
|
|
errorData := map[string]any{
|
|
"error": map[string]string{
|
|
"type": errType,
|
|
"message": message,
|
|
},
|
|
}
|
|
jsonBytes, err := json.Marshal(errorData)
|
|
if err != nil {
|
|
_ = c.Error(err)
|
|
return
|
|
}
|
|
errorEvent := fmt.Sprintf("event: error\ndata: %s\n\n", string(jsonBytes))
|
|
if _, err := fmt.Fprint(c.Writer, errorEvent); err != nil {
|
|
_ = c.Error(err)
|
|
}
|
|
flusher.Flush()
|
|
}
|
|
return
|
|
}
|
|
h.errorResponse(c, status, errType, message)
|
|
}
|
|
|
|
func (h *SoraGatewayHandler) errorResponse(c *gin.Context, status int, errType, message string) {
|
|
c.JSON(status, gin.H{
|
|
"error": gin.H{
|
|
"type": errType,
|
|
"message": message,
|
|
},
|
|
})
|
|
}
|
|
|
|
// MediaProxy serves local Sora media files.
|
|
func (h *SoraGatewayHandler) MediaProxy(c *gin.Context) {
|
|
h.proxySoraMedia(c, false)
|
|
}
|
|
|
|
// MediaProxySigned serves local Sora media files with signature verification.
|
|
func (h *SoraGatewayHandler) MediaProxySigned(c *gin.Context) {
|
|
h.proxySoraMedia(c, true)
|
|
}
|
|
|
|
func (h *SoraGatewayHandler) proxySoraMedia(c *gin.Context, requireSignature bool) {
|
|
rawPath := c.Param("filepath")
|
|
if rawPath == "" {
|
|
c.Status(http.StatusNotFound)
|
|
return
|
|
}
|
|
cleaned := path.Clean(rawPath)
|
|
if !strings.HasPrefix(cleaned, "/image/") && !strings.HasPrefix(cleaned, "/video/") {
|
|
c.Status(http.StatusNotFound)
|
|
return
|
|
}
|
|
|
|
query := c.Request.URL.Query()
|
|
if requireSignature {
|
|
if h.soraMediaSigningKey == "" {
|
|
c.JSON(http.StatusServiceUnavailable, gin.H{
|
|
"error": gin.H{
|
|
"type": "api_error",
|
|
"message": "Sora 媒体签名未配置",
|
|
},
|
|
})
|
|
return
|
|
}
|
|
expiresStr := strings.TrimSpace(query.Get("expires"))
|
|
signature := strings.TrimSpace(query.Get("sig"))
|
|
expires, err := strconv.ParseInt(expiresStr, 10, 64)
|
|
if err != nil || expires <= time.Now().Unix() {
|
|
c.JSON(http.StatusUnauthorized, gin.H{
|
|
"error": gin.H{
|
|
"type": "authentication_error",
|
|
"message": "Sora 媒体签名已过期",
|
|
},
|
|
})
|
|
return
|
|
}
|
|
query.Del("sig")
|
|
query.Del("expires")
|
|
signingQuery := query.Encode()
|
|
if !service.VerifySoraMediaURL(cleaned, signingQuery, expires, signature, h.soraMediaSigningKey) {
|
|
c.JSON(http.StatusUnauthorized, gin.H{
|
|
"error": gin.H{
|
|
"type": "authentication_error",
|
|
"message": "Sora 媒体签名无效",
|
|
},
|
|
})
|
|
return
|
|
}
|
|
}
|
|
if strings.TrimSpace(h.soraMediaRoot) == "" {
|
|
c.JSON(http.StatusServiceUnavailable, gin.H{
|
|
"error": gin.H{
|
|
"type": "api_error",
|
|
"message": "Sora 媒体目录未配置",
|
|
},
|
|
})
|
|
return
|
|
}
|
|
|
|
relative := strings.TrimPrefix(cleaned, "/")
|
|
localPath := filepath.Join(h.soraMediaRoot, filepath.FromSlash(relative))
|
|
if _, err := os.Stat(localPath); err != nil {
|
|
if os.IsNotExist(err) {
|
|
c.Status(http.StatusNotFound)
|
|
return
|
|
}
|
|
c.Status(http.StatusInternalServerError)
|
|
return
|
|
}
|
|
c.File(localPath)
|
|
}
|