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feat(openai): 支持messages模型映射与instructions模板注入

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This commit is contained in:
IanShaw027
2026-04-09 12:29:49 +08:00
parent 23c4d592f8
commit 4de4823a65
11 changed files with 326 additions and 47 deletions
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43
backend/internal/handler/openai_gateway_handler.go
View File

@@ -47,6 +47,13 @@ func resolveOpenAIForwardDefaultMappedModel(apiKey *service.APIKey, fallbackMode
return strings.TrimSpace(apiKey.Group.DefaultMappedModel)
}
func resolveOpenAIMessagesDispatchMappedModel(apiKey *service.APIKey, requestedModel string) string {
if apiKey == nil || apiKey.Group == nil {
return ""
}
return strings.TrimSpace(apiKey.Group.ResolveMessagesDispatchModel(requestedModel))
}
// NewOpenAIGatewayHandler creates a new OpenAIGatewayHandler
func NewOpenAIGatewayHandler(
gatewayService *service.OpenAIGatewayService,
@@ -551,6 +558,7 @@ func (h *OpenAIGatewayHandler) Messages(c *gin.Context) {
}
reqModel := modelResult.String()
routingModel := service.NormalizeOpenAICompatRequestedModel(reqModel)
preferredMappedModel := resolveOpenAIMessagesDispatchMappedModel(apiKey, reqModel)
reqStream := gjson.GetBytes(body, "stream").Bool()
reqLog = reqLog.With(zap.String("model", reqModel), zap.Bool("stream", reqStream))
@@ -609,17 +617,20 @@ func (h *OpenAIGatewayHandler) Messages(c *gin.Context) {
failedAccountIDs := make(map[int64]struct{})
sameAccountRetryCount := make(map[int64]int)
var lastFailoverErr *service.UpstreamFailoverError
effectiveMappedModel := preferredMappedModel
for {
// 清除上一次迭代的降级模型标记，避免残留影响本次迭代
c.Set("openai_messages_fallback_model", "")
currentRoutingModel := routingModel
if effectiveMappedModel != "" {
currentRoutingModel = effectiveMappedModel
}
reqLog.Debug("openai_messages.account_selecting", zap.Int("excluded_account_count", len(failedAccountIDs)))
selection, scheduleDecision, err := h.gatewayService.SelectAccountWithScheduler(
c.Request.Context(),
apiKey.GroupID,
"", // no previous_response_id
sessionHash,
routingModel,
currentRoutingModel,
failedAccountIDs,
service.OpenAIUpstreamTransportAny,
)
@@ -628,29 +639,7 @@ func (h *OpenAIGatewayHandler) Messages(c *gin.Context) {
zap.Error(err),
zap.Int("excluded_account_count", len(failedAccountIDs)),
)
// 首次调度失败 + 有默认映射模型 → 用默认模型重试
if len(failedAccountIDs) == 0 {
defaultModel := ""
if apiKey.Group != nil {
defaultModel = apiKey.Group.DefaultMappedModel
}
if defaultModel != "" && defaultModel != routingModel {
reqLog.Info("openai_messages.fallback_to_default_model",
zap.String("default_mapped_model", defaultModel),
)
selection, scheduleDecision, err = h.gatewayService.SelectAccountWithScheduler(
c.Request.Context(),
apiKey.GroupID,
"",
sessionHash,
defaultModel,
failedAccountIDs,
service.OpenAIUpstreamTransportAny,
)
if err == nil && selection != nil {
c.Set("openai_messages_fallback_model", defaultModel)
}
}
if err != nil {
h.anthropicStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "Service temporarily unavailable", streamStarted)
return
@@ -682,9 +671,7 @@ func (h *OpenAIGatewayHandler) Messages(c *gin.Context) {
service.SetOpsLatencyMs(c, service.OpsRoutingLatencyMsKey, time.Since(routingStart).Milliseconds())
forwardStart := time.Now()
// Forward 层需要始终拿到 group 默认映射模型，这样未命中账号级映射的
// Claude 兼容模型才不会在后续 Codex 规范化中意外退化到 gpt-5.1。
defaultMappedModel := resolveOpenAIForwardDefaultMappedModel(apiKey, c.GetString("openai_messages_fallback_model"))
defaultMappedModel := strings.TrimSpace(effectiveMappedModel)
// 应用渠道模型映射到请求体
forwardBody := body
if channelMappingMsg.Mapped {

41
backend/internal/handler/openai_gateway_handler_test.go
View File

@@ -360,7 +360,7 @@ func TestResolveOpenAIForwardDefaultMappedModel(t *testing.T) {
require.Equal(t, "gpt-5.2", resolveOpenAIForwardDefaultMappedModel(apiKey, " gpt-5.2 "))
})
t.Run("uses_group_default_on_normal_path", func(t *testing.T) {
t.Run("uses_group_default_when_explicit_fallback_absent", func(t *testing.T) {
apiKey := &service.APIKey{
Group: &service.Group{DefaultMappedModel: "gpt-5.4"},
}
@@ -376,6 +376,45 @@ func TestResolveOpenAIForwardDefaultMappedModel(t *testing.T) {
})
}
func TestResolveOpenAIMessagesDispatchMappedModel(t *testing.T) {
t.Run("exact_claude_model_override_wins", func(t *testing.T) {
apiKey := &service.APIKey{
Group: &service.Group{
MessagesDispatchModelConfig: service.OpenAIMessagesDispatchModelConfig{
SonnetMappedModel: "gpt-5.2",
ExactModelMappings: map[string]string{
"claude-sonnet-4-5-20250929": "gpt-5.4-mini-high",
},
},
},
}
require.Equal(t, "gpt-5.4-mini", resolveOpenAIMessagesDispatchMappedModel(apiKey, "claude-sonnet-4-5-20250929"))
})
t.Run("uses_family_default_when_no_override", func(t *testing.T) {
apiKey := &service.APIKey{Group: &service.Group{}}
require.Equal(t, "gpt-5.4", resolveOpenAIMessagesDispatchMappedModel(apiKey, "claude-opus-4-6"))
require.Equal(t, "gpt-5.3-codex", resolveOpenAIMessagesDispatchMappedModel(apiKey, "claude-sonnet-4-5-20250929"))
require.Equal(t, "gpt-5.4-mini", resolveOpenAIMessagesDispatchMappedModel(apiKey, "claude-haiku-4-5-20251001"))
})
t.Run("returns_empty_for_non_claude_or_missing_group", func(t *testing.T) {
require.Empty(t, resolveOpenAIMessagesDispatchMappedModel(nil, "claude-sonnet-4-5-20250929"))
require.Empty(t, resolveOpenAIMessagesDispatchMappedModel(&service.APIKey{}, "claude-sonnet-4-5-20250929"))
require.Empty(t, resolveOpenAIMessagesDispatchMappedModel(&service.APIKey{Group: &service.Group{}}, "gpt-5.4"))
})
t.Run("does_not_fall_back_to_group_default_mapped_model", func(t *testing.T) {
apiKey := &service.APIKey{
Group: &service.Group{
DefaultMappedModel: "gpt-5.4",
},
}
require.Empty(t, resolveOpenAIMessagesDispatchMappedModel(apiKey, "gpt-5.4"))
require.Equal(t, "gpt-5.3-codex", resolveOpenAIMessagesDispatchMappedModel(apiKey, "claude-sonnet-4-5-20250929"))
})
}
func TestOpenAIResponses_MissingDependencies_ReturnsServiceUnavailable(t *testing.T) {
gin.SetMode(gin.TestMode)