88 lines
2.9 KiB
Go
88 lines
2.9 KiB
Go
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package handler
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import (
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"net/http"
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"github.com/gin-gonic/gin"
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infraerrors "github.com/Wei-Shaw/sub2api/internal/pkg/errors"
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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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)
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// CodexModels serves the Codex models manifest for Codex clients.
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//
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// Codex CLI and the Codex desktop app refresh their model picker from
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// GET {base_url}/models?client_version=... (custom provider mode) or
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// GET /backend-api/codex/models (chatgpt_base_url mode). Both routes land
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// here. ChatGPT manifests are proxied verbatim; custom API key manifests receive
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// provider-compatibility normalization and use a short-lived, asynchronously
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// revalidated cache to tolerate canceled client requests.
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func (h *OpenAIGatewayHandler) CodexModels(c *gin.Context) {
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if c.Request.Context().Err() != nil {
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return
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}
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apiKey, ok := middleware2.GetAPIKeyFromContext(c)
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if !ok || apiKey.Group == nil {
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h.errorResponse(c, http.StatusUnauthorized, "invalid_request_error", "API key group is required")
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return
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}
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if apiKey.Group.Platform != service.PlatformOpenAI && apiKey.Group.Platform != service.PlatformComposite {
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h.errorResponse(c, http.StatusNotFound, "not_found_error", "Codex models manifest is only available for OpenAI and Composite groups")
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return
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}
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maxAccountSwitches := h.maxAccountSwitches
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if maxAccountSwitches <= 0 {
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maxAccountSwitches = 3
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}
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failedAccountIDs := make(map[int64]struct{})
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switchCount := 0
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var lastUpstreamErr error
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for {
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account, err := h.gatewayService.SelectAccountForModelWithExclusions(c.Request.Context(), apiKey.GroupID, "", "", failedAccountIDs)
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if err != nil {
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if c.Request.Context().Err() != nil {
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return
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}
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if lastUpstreamErr != nil {
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h.errorResponse(c, infraerrors.Code(lastUpstreamErr), "upstream_error", infraerrors.Message(lastUpstreamErr))
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return
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}
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h.errorResponse(c, http.StatusServiceUnavailable, "upstream_error", "No available OpenAI accounts")
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return
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}
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// 让 ops 错误日志携带实际选中的上游账号，便于定位失效账号（#4544）。
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setOpsSelectedAccount(c, account.ID, account.Platform)
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manifest, err := h.gatewayService.FetchCodexModelsManifest(c.Request.Context(), account, c.Query("client_version"), c.GetHeader("If-None-Match"))
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if err != nil {
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if c.Request.Context().Err() != nil {
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return
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}
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if service.IsRetryableCodexModelsManifestError(err) && switchCount < maxAccountSwitches {
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failedAccountIDs[account.ID] = struct{}{}
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switchCount++
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lastUpstreamErr = err
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continue
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}
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h.errorResponse(c, infraerrors.Code(err), "upstream_error", infraerrors.Message(err))
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return
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}
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if c.Request.Context().Err() != nil {
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return
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}
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if manifest.ETag != "" {
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c.Header("ETag", manifest.ETag)
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}
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if manifest.NotModified {
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c.Status(http.StatusNotModified)
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return
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}
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c.Data(http.StatusOK, "application/json", manifest.Body)
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return
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}
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}
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