fix(openai): detect official codex client by headers

backend/internal/pkg/openai/request.go

@@ -58,6 +58,12 @@ func IsCodexOfficialClientOriginator(originator string) bool {
 	return matchCodexClientHeaderPrefixes(v, CodexOfficialClientOriginatorPrefixes)
 }
 
+// IsCodexOfficialClientByHeaders checks whether the request headers indicate an
+// official Codex client family request.
+func IsCodexOfficialClientByHeaders(userAgent, originator string) bool {
+	return IsCodexOfficialClientRequest(userAgent) || IsCodexOfficialClientOriginator(originator)
+}
+
 func normalizeCodexClientHeader(value string) string {
 	return strings.ToLower(strings.TrimSpace(value))
 }

backend/internal/pkg/openai/request_test.go

@@ -85,3 +85,26 @@ func TestIsCodexOfficialClientOriginator(t *testing.T) {
 		})
 	}
 }
+
+func TestIsCodexOfficialClientByHeaders(t *testing.T) {
+	tests := []struct {
+		name       string
+		ua         string
+		originator string
+		want       bool
+	}{
+		{name: "仅 originator 命中 desktop", originator: "Codex Desktop", want: true},
+		{name: "仅 originator 命中 vscode", originator: "codex_vscode", want: true},
+		{name: "仅 ua 命中 desktop", ua: "Codex Desktop/1.2.3", want: true},
+		{name: "ua 与 originator 都未命中", ua: "curl/8.0.1", originator: "my_client", want: false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := IsCodexOfficialClientByHeaders(tt.ua, tt.originator)
+			if got != tt.want {
+				t.Fatalf("IsCodexOfficialClientByHeaders(%q, %q) = %v, want %v", tt.ua, tt.originator, got, tt.want)
+			}
+		})
+	}
+}

backend/internal/service/openai_gateway_service.go

@@ -834,8 +834,10 @@ func logOpenAIInstructionsRequiredDebug(
 	}
 
 	userAgent := ""
+	originator := ""
 	if c != nil {
 		userAgent = strings.TrimSpace(c.GetHeader("User-Agent"))
+		originator = strings.TrimSpace(c.GetHeader("originator"))
 	}
 
 	fields := []zap.Field{
@@ -845,7 +847,7 @@ func logOpenAIInstructionsRequiredDebug(
 		zap.Int("upstream_status_code", upstreamStatusCode),
 		zap.String("upstream_error_message", msg),
 		zap.String("request_user_agent", userAgent),
-		zap.Bool("codex_official_client_match", openai.IsCodexCLIRequest(userAgent)),
+		zap.Bool("codex_official_client_match", openai.IsCodexOfficialClientByHeaders(userAgent, originator)),
 	}
 	fields = appendCodexCLIOnlyRejectedRequestFields(fields, c, requestBody)
 
@@ -968,6 +970,18 @@ func (s *OpenAIGatewayService) GenerateSessionHashWithFallback(c *gin.Context, b
 	return currentHash
 }
 
+func resolveOpenAIUpstreamOriginator(c *gin.Context, isOfficialClient bool) string {
+	if c != nil {
+		if originator := strings.TrimSpace(c.GetHeader("originator")); originator != "" {
+			return originator
+		}
+	}
+	if isOfficialClient {
+		return "codex_cli_rs"
+	}
+	return "opencode"
+}
+
 // BindStickySession sets session -> account binding with standard TTL.
 func (s *OpenAIGatewayService) BindStickySession(ctx context.Context, groupID *int64, sessionHash string, accountID int64) error {
 	if sessionHash == "" || accountID <= 0 {
@@ -1489,7 +1503,7 @@ func (s *OpenAIGatewayService) Forward(ctx context.Context, c *gin.Context, acco
 	reqModel, reqStream, promptCacheKey := extractOpenAIRequestMetaFromBody(body)
 	originalModel := reqModel
 
-	isCodexCLI := openai.IsCodexCLIRequest(c.GetHeader("User-Agent")) || (s.cfg != nil && s.cfg.Gateway.ForceCodexCLI)
+	isCodexCLI := openai.IsCodexOfficialClientByHeaders(c.GetHeader("User-Agent"), c.GetHeader("originator")) || (s.cfg != nil && s.cfg.Gateway.ForceCodexCLI)
 	wsDecision := s.getOpenAIWSProtocolResolver().Resolve(account)
 	clientTransport := GetOpenAIClientTransport(c)
 	// 仅允许 WS 入站请求走 WS 上游，避免出现 HTTP -> WS 协议混用。
@@ -2664,11 +2678,7 @@ func (s *OpenAIGatewayService) buildUpstreamRequest(ctx context.Context, c *gin.
 	}
 	if account.Type == AccountTypeOAuth {
 		req.Header.Set("OpenAI-Beta", "responses=experimental")
-		if isCodexCLI {
-			req.Header.Set("originator", "codex_cli_rs")
-		} else {
-			req.Header.Set("originator", "opencode")
-		}
+		req.Header.Set("originator", resolveOpenAIUpstreamOriginator(c, isCodexCLI))
 		if isOpenAIResponsesCompactPath(c) {
 			req.Header.Set("accept", "application/json")
 			if req.Header.Get("version") == "" {

backend/internal/service/openai_gateway_service_test.go

@@ -14,6 +14,7 @@ import (
 	"time"
 
 	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/openai"
 	"github.com/cespare/xxhash/v2"
 	"github.com/gin-gonic/gin"
 	"github.com/stretchr/testify/require"
@@ -1372,6 +1373,46 @@ func TestOpenAIBuildUpstreamRequestPreservesCompactPathForAPIKeyBaseURL(t *testi
 	require.Equal(t, "https://example.com/v1/responses/compact", req.URL.String())
 }
 
+func TestOpenAIBuildUpstreamRequestOAuthOfficialClientOriginatorCompatibility(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	tests := []struct {
+		name           string
+		userAgent      string
+		originator     string
+		wantOriginator string
+	}{
+		{name: "desktop originator preserved", originator: "Codex Desktop", wantOriginator: "Codex Desktop"},
+		{name: "vscode originator preserved", originator: "codex_vscode", wantOriginator: "codex_vscode"},
+		{name: "official ua fallback to codex_cli_rs", userAgent: "Codex Desktop/1.2.3", wantOriginator: "codex_cli_rs"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			rec := httptest.NewRecorder()
+			c, _ := gin.CreateTestContext(rec)
+			c.Request = httptest.NewRequest(http.MethodPost, "/v1/responses", bytes.NewReader([]byte(`{"model":"gpt-5"}`)))
+			if tt.userAgent != "" {
+				c.Request.Header.Set("User-Agent", tt.userAgent)
+			}
+			if tt.originator != "" {
+				c.Request.Header.Set("originator", tt.originator)
+			}
+
+			svc := &OpenAIGatewayService{}
+			account := &Account{
+				Type:        AccountTypeOAuth,
+				Credentials: map[string]any{"chatgpt_account_id": "chatgpt-acc"},
+			}
+
+			isCodexCLI := openai.IsCodexOfficialClientByHeaders(c.GetHeader("User-Agent"), c.GetHeader("originator"))
+			req, err := svc.buildUpstreamRequest(c.Request.Context(), c, account, []byte(`{"model":"gpt-5"}`), "token", false, "", isCodexCLI)
+			require.NoError(t, err)
+			require.Equal(t, tt.wantOriginator, req.Header.Get("originator"))
+		})
+	}
+}
+
 // ==================== P1-08 修复：model 替换性能优化测试 ====================
 
 // ==================== P1-08 修复：model 替换性能优化测试 =============

backend/internal/service/openai_ws_forwarder.go

@@ -1141,11 +1141,7 @@ func (s *OpenAIGatewayService) buildOpenAIWSHeaders(
 		if chatgptAccountID := account.GetChatGPTAccountID(); chatgptAccountID != "" {
 			headers.Set("chatgpt-account-id", chatgptAccountID)
 		}
-		if isCodexCLI {
-			headers.Set("originator", "codex_cli_rs")
-		} else {
-			headers.Set("originator", "opencode")
-		}
+		headers.Set("originator", resolveOpenAIUpstreamOriginator(c, isCodexCLI))
 	}
 
 	betaValue := openAIWSBetaV2Value
@@ -2543,7 +2539,7 @@ func (s *OpenAIGatewayService) ProxyResponsesWebSocketFromClient(
 		}
 	}
 
-	isCodexCLI := openai.IsCodexCLIRequest(c.GetHeader("User-Agent")) || (s.cfg != nil && s.cfg.Gateway.ForceCodexCLI)
+	isCodexCLI := openai.IsCodexOfficialClientByHeaders(c.GetHeader("User-Agent"), c.GetHeader("originator")) || (s.cfg != nil && s.cfg.Gateway.ForceCodexCLI)
 	wsHeaders, _ := s.buildOpenAIWSHeaders(c, account, token, wsDecision, isCodexCLI, turnState, strings.TrimSpace(c.GetHeader(openAIWSTurnMetadataHeader)), firstPayload.promptCacheKey)
 	baseAcquireReq := openAIWSAcquireRequest{
 		Account: account,

backend/internal/service/openai_ws_forwarder_success_test.go

@@ -458,6 +458,86 @@ func TestOpenAIGatewayService_Forward_WSv2_OAuthStoreFalseByDefault(t *testing.T
 	require.Equal(t, "conv-oauth-1", captureDialer.lastHeaders.Get("conversation_id"))
 }
 
+func TestOpenAIGatewayService_Forward_WSv2_OAuthOriginatorCompatibility(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	tests := []struct {
+		name           string
+		userAgent      string
+		originator     string
+		wantOriginator string
+	}{
+		{name: "desktop originator preserved", originator: "Codex Desktop", wantOriginator: "Codex Desktop"},
+		{name: "vscode originator preserved", originator: "codex_vscode", wantOriginator: "codex_vscode"},
+		{name: "official ua fallback to codex_cli_rs", userAgent: "Codex Desktop/1.2.3", wantOriginator: "codex_cli_rs"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			rec := httptest.NewRecorder()
+			c, _ := gin.CreateTestContext(rec)
+			c.Request = httptest.NewRequest(http.MethodPost, "/openai/v1/responses", nil)
+			if tt.userAgent != "" {
+				c.Request.Header.Set("User-Agent", tt.userAgent)
+			}
+			if tt.originator != "" {
+				c.Request.Header.Set("originator", tt.originator)
+			}
+
+			cfg := &config.Config{}
+			cfg.Security.URLAllowlist.Enabled = false
+			cfg.Security.URLAllowlist.AllowInsecureHTTP = true
+			cfg.Gateway.OpenAIWS.Enabled = true
+			cfg.Gateway.OpenAIWS.OAuthEnabled = true
+			cfg.Gateway.OpenAIWS.APIKeyEnabled = true
+			cfg.Gateway.OpenAIWS.ResponsesWebsocketsV2 = true
+			cfg.Gateway.OpenAIWS.AllowStoreRecovery = false
+			cfg.Gateway.OpenAIWS.MaxConnsPerAccount = 1
+			cfg.Gateway.OpenAIWS.MinIdlePerAccount = 0
+			cfg.Gateway.OpenAIWS.MaxIdlePerAccount = 1
+
+			captureConn := &openAIWSCaptureConn{
+				events: [][]byte{
+					[]byte(`{"type":"response.completed","response":{"id":"resp_oauth_originator","model":"gpt-5.1","usage":{"input_tokens":1,"output_tokens":1}}}`),
+				},
+			}
+			captureDialer := &openAIWSCaptureDialer{conn: captureConn}
+			pool := newOpenAIWSConnPool(cfg)
+			pool.setClientDialerForTest(captureDialer)
+
+			svc := &OpenAIGatewayService{
+				cfg:              cfg,
+				httpUpstream:     &httpUpstreamRecorder{},
+				cache:            &stubGatewayCache{},
+				openaiWSResolver: NewOpenAIWSProtocolResolver(cfg),
+				toolCorrector:    NewCodexToolCorrector(),
+				openaiWSPool:     pool,
+			}
+			account := &Account{
+				ID:          129,
+				Name:        "openai-oauth",
+				Platform:    PlatformOpenAI,
+				Type:        AccountTypeOAuth,
+				Status:      StatusActive,
+				Schedulable: true,
+				Concurrency: 1,
+				Credentials: map[string]any{
+					"access_token": "oauth-token-1",
+				},
+				Extra: map[string]any{
+					"responses_websockets_v2_enabled": true,
+				},
+			}
+
+			body := []byte(`{"model":"gpt-5.1","stream":false,"input":[{"type":"input_text","text":"hello"}]}`)
+			result, err := svc.Forward(context.Background(), c, account, body)
+			require.NoError(t, err)
+			require.NotNil(t, result)
+			require.Equal(t, tt.wantOriginator, captureDialer.lastHeaders.Get("originator"))
+		})
+	}
+}
+
 func TestOpenAIGatewayService_Forward_WSv2_HeaderSessionFallbackFromPromptCacheKey(t *testing.T) {
 	gin.SetMode(gin.TestMode)
 

backend/internal/service/openai_ws_v2_passthrough_adapter.go

@@ -107,7 +107,7 @@ func (s *OpenAIGatewayService) proxyResponsesWebSocketV2Passthrough(
 
 	isCodexCLI := false
 	if c != nil {
-		isCodexCLI = openai.IsCodexCLIRequest(c.GetHeader("User-Agent"))
+		isCodexCLI = openai.IsCodexOfficialClientByHeaders(c.GetHeader("User-Agent"), c.GetHeader("originator"))
 	}
 	if s.cfg != nil && s.cfg.Gateway.ForceCodexCLI {
 		isCodexCLI = true