e8642f4bba
Muse now sends scene, routing policy, and degrade policy with each per-user request, so new-api should interpret those hints instead of leaving retry scope and fallback behavior implicit in static token settings alone. This introduces a small Muse routing-policy interpreter, lets distributor switch quality-first traffic onto auto-group retry, and retries against lower-tier model candidates when the degrade policy allows it. The policy stays lightweight and still respects user-usable groups. Constraint: Routing decisions must remain compatible with existing channel/group selection and not require schema changes Constraint: Muse can hint policy, but new-api must still enforce only user-usable groups and channel availability Rejected: Hardcoding physical channel/group choices inside Muse | would keep routing ownership outside new-api Rejected: Expanding the policy into a full declarative DSL in phase 1 | overdesigned for the immediate routing/degrade handoff Confidence: medium Scope-risk: moderate Reversibility: clean Directive: Keep Muse routing policy interpretation small and observable; if more scenes appear, extend the helper rather than scattering policy branches across middleware Tested: go test ./service -run MuseRoutingPolicy -count=1 Tested: go test ./service -count=1 Not-tested: Live relay selection against production channel inventory
494 lines
19 KiB
Go
494 lines
19 KiB
Go
package middleware
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import (
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"errors"
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"fmt"
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"net/http"
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"slices"
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"strconv"
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"strings"
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"time"
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"github.com/QuantumNous/new-api/common"
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"github.com/QuantumNous/new-api/constant"
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"github.com/QuantumNous/new-api/dto"
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"github.com/QuantumNous/new-api/i18n"
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"github.com/QuantumNous/new-api/model"
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relayconstant "github.com/QuantumNous/new-api/relay/constant"
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"github.com/QuantumNous/new-api/service"
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"github.com/QuantumNous/new-api/setting/ratio_setting"
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"github.com/QuantumNous/new-api/types"
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"github.com/gin-gonic/gin"
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)
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type ModelRequest struct {
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Model string `json:"model"`
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Group string `json:"group,omitempty"`
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Metadata *MuseRoutingPolicyInput `json:"metadata,omitempty"`
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}
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type MuseRoutingPolicyInput struct {
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Scene string `json:"scene,omitempty"`
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RoutingPolicy string `json:"routing_policy,omitempty"`
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DegradePolicy string `json:"degrade_policy,omitempty"`
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}
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func Distribute() func(c *gin.Context) {
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return func(c *gin.Context) {
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var channel *model.Channel
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channelId, ok := common.GetContextKey(c, constant.ContextKeyTokenSpecificChannelId)
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modelRequest, shouldSelectChannel, err := getModelRequest(c)
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if err != nil {
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abortWithOpenAiMessage(c, http.StatusBadRequest, i18n.T(c, i18n.MsgDistributorInvalidRequest, map[string]any{"Error": err.Error()}))
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return
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}
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policy := service.ResolveMuseRoutingPolicy(
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firstNonBlank(common.GetContextKeyString(c, constant.ContextKeyMuseScene), modelRequest.MetadataValue("scene")),
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modelRequest.MetadataValue("routing_policy"),
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modelRequest.MetadataValue("degrade_policy"),
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)
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service.SetMuseRoutingPolicy(c, policy)
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if ok {
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id, err := strconv.Atoi(channelId.(string))
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if err != nil {
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abortWithOpenAiMessage(c, http.StatusBadRequest, i18n.T(c, i18n.MsgDistributorInvalidChannelId))
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return
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}
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channel, err = model.GetChannelById(id, true)
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if err != nil {
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abortWithOpenAiMessage(c, http.StatusBadRequest, i18n.T(c, i18n.MsgDistributorInvalidChannelId))
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return
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}
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if channel.Status != common.ChannelStatusEnabled {
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abortWithOpenAiMessage(c, http.StatusForbidden, i18n.T(c, i18n.MsgDistributorChannelDisabled))
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return
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}
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} else {
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// Select a channel for the user
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// check token model mapping
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modelLimitEnable := common.GetContextKeyBool(c, constant.ContextKeyTokenModelLimitEnabled)
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if modelLimitEnable {
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s, ok := common.GetContextKey(c, constant.ContextKeyTokenModelLimit)
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if !ok {
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// token model limit is empty, all models are not allowed
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abortWithOpenAiMessage(c, http.StatusForbidden, i18n.T(c, i18n.MsgDistributorTokenNoModelAccess))
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return
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}
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var tokenModelLimit map[string]bool
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tokenModelLimit, ok = s.(map[string]bool)
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if !ok {
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tokenModelLimit = map[string]bool{}
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}
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matchName := ratio_setting.FormatMatchingModelName(modelRequest.Model) // match gpts & thinking-*
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if _, ok := tokenModelLimit[matchName]; !ok {
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abortWithOpenAiMessage(c, http.StatusForbidden, i18n.T(c, i18n.MsgDistributorTokenModelForbidden, map[string]any{"Model": modelRequest.Model}))
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return
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}
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}
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if shouldSelectChannel {
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if modelRequest.Model == "" {
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abortWithOpenAiMessage(c, http.StatusBadRequest, i18n.T(c, i18n.MsgDistributorModelNameRequired))
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return
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}
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var selectGroup string
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usingGroup := common.GetContextKeyString(c, constant.ContextKeyUsingGroup)
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// check path is /pg/chat/completions
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if strings.HasPrefix(c.Request.URL.Path, "/pg/chat/completions") {
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playgroundRequest := &dto.PlayGroundRequest{}
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err = common.UnmarshalBodyReusable(c, playgroundRequest)
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if err != nil {
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abortWithOpenAiMessage(c, http.StatusBadRequest, i18n.T(c, i18n.MsgDistributorInvalidPlayground, map[string]any{"Error": err.Error()}))
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return
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}
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if playgroundRequest.Group != "" {
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if !service.GroupInUserUsableGroups(usingGroup, playgroundRequest.Group) && playgroundRequest.Group != usingGroup {
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abortWithOpenAiMessage(c, http.StatusForbidden, i18n.T(c, i18n.MsgDistributorGroupAccessDenied))
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return
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}
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usingGroup = playgroundRequest.Group
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common.SetContextKey(c, constant.ContextKeyUsingGroup, usingGroup)
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}
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}
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usingGroup = service.ApplyMuseRoutingPolicy(c, usingGroup)
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if preferredChannelID, found := service.GetPreferredChannelByAffinity(c, modelRequest.Model, usingGroup); found {
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preferred, err := model.CacheGetChannel(preferredChannelID)
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if err == nil && preferred != nil {
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if preferred.Status != common.ChannelStatusEnabled {
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if service.ShouldSkipRetryAfterChannelAffinityFailure(c) {
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abortWithOpenAiMessage(c, http.StatusForbidden, i18n.T(c, i18n.MsgDistributorChannelDisabled))
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return
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}
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} else if usingGroup == "auto" {
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userGroup := common.GetContextKeyString(c, constant.ContextKeyUserGroup)
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autoGroups := service.ResolveMusePreferredGroups(c, userGroup)
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for _, g := range autoGroups {
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if model.IsChannelEnabledForGroupModel(g, modelRequest.Model, preferred.Id) {
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selectGroup = g
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common.SetContextKey(c, constant.ContextKeyAutoGroup, g)
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channel = preferred
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service.MarkChannelAffinityUsed(c, g, preferred.Id)
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break
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}
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}
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} else if model.IsChannelEnabledForGroupModel(usingGroup, modelRequest.Model, preferred.Id) {
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channel = preferred
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selectGroup = usingGroup
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service.MarkChannelAffinityUsed(c, usingGroup, preferred.Id)
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}
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}
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}
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if channel == nil {
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retryParam := &service.RetryParam{
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Ctx: c,
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ModelName: modelRequest.Model,
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TokenGroup: usingGroup,
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Retry: common.GetPointer(0),
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}
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channel, selectGroup, err = service.CacheGetRandomSatisfiedChannel(retryParam)
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if channel == nil && err == nil {
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candidates := service.MuseFallbackModelCandidates(modelRequest.Model, policy)
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for _, candidateModel := range candidates[1:] {
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candidateParam := &service.RetryParam{
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Ctx: c,
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ModelName: candidateModel,
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TokenGroup: usingGroup,
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Retry: common.GetPointer(0),
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}
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channel, selectGroup, err = service.CacheGetRandomSatisfiedChannel(candidateParam)
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if channel != nil || err != nil {
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if channel != nil {
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modelRequest.Model = candidateModel
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}
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break
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}
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}
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}
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if err != nil {
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showGroup := usingGroup
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if usingGroup == "auto" {
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showGroup = fmt.Sprintf("auto(%s)", selectGroup)
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}
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message := i18n.T(c, i18n.MsgDistributorGetChannelFailed, map[string]any{"Group": showGroup, "Model": modelRequest.Model, "Error": err.Error()})
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// 如果错误，但是渠道不为空，说明是数据库一致性问题
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//if channel != nil {
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// common.SysError(fmt.Sprintf("渠道不存在：%d", channel.Id))
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// message = "数据库一致性已被破坏，请联系管理员"
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//}
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abortWithOpenAiMessage(c, http.StatusServiceUnavailable, message, types.ErrorCodeModelNotFound)
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return
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}
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if channel == nil {
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abortWithOpenAiMessage(c, http.StatusServiceUnavailable, i18n.T(c, i18n.MsgDistributorNoAvailableChannel, map[string]any{"Group": usingGroup, "Model": modelRequest.Model}), types.ErrorCodeModelNotFound)
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return
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}
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}
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}
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}
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common.SetContextKey(c, constant.ContextKeyRequestStartTime, time.Now())
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SetupContextForSelectedChannel(c, channel, modelRequest.Model)
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c.Next()
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if channel != nil && c.Writer != nil && c.Writer.Status() < http.StatusBadRequest {
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service.RecordChannelAffinity(c, channel.Id)
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}
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}
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}
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func (r *ModelRequest) MetadataValue(name string) string {
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if r == nil || r.Metadata == nil {
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return ""
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}
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switch name {
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case "scene":
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return r.Metadata.Scene
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case "routing_policy":
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return r.Metadata.RoutingPolicy
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case "degrade_policy":
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return r.Metadata.DegradePolicy
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default:
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return ""
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}
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}
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func firstNonBlank(values ...string) string {
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for _, value := range values {
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if strings.TrimSpace(value) != "" {
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return strings.TrimSpace(value)
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}
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}
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return ""
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}
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// getModelFromRequest 从请求中读取模型信息
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// 根据 Content-Type 自动处理：
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// - application/json
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// - application/x-www-form-urlencoded
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// - multipart/form-data
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func getModelFromRequest(c *gin.Context) (*ModelRequest, error) {
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var modelRequest ModelRequest
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err := common.UnmarshalBodyReusable(c, &modelRequest)
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if err != nil {
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return nil, errors.New(i18n.T(c, i18n.MsgDistributorInvalidRequest, map[string]any{"Error": err.Error()}))
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}
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return &modelRequest, nil
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}
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func getModelRequest(c *gin.Context) (*ModelRequest, bool, error) {
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var modelRequest ModelRequest
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shouldSelectChannel := true
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var err error
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if strings.Contains(c.Request.URL.Path, "/mj/") {
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relayMode := relayconstant.Path2RelayModeMidjourney(c.Request.URL.Path)
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if relayMode == relayconstant.RelayModeMidjourneyTaskFetch ||
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relayMode == relayconstant.RelayModeMidjourneyTaskFetchByCondition ||
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relayMode == relayconstant.RelayModeMidjourneyNotify ||
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relayMode == relayconstant.RelayModeMidjourneyTaskImageSeed {
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shouldSelectChannel = false
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} else {
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midjourneyRequest := dto.MidjourneyRequest{}
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err = common.UnmarshalBodyReusable(c, &midjourneyRequest)
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if err != nil {
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return nil, false, errors.New(i18n.T(c, i18n.MsgDistributorInvalidMidjourney, map[string]any{"Error": err.Error()}))
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}
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midjourneyModel, mjErr, success := service.GetMjRequestModel(relayMode, &midjourneyRequest)
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if mjErr != nil {
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return nil, false, fmt.Errorf("%s", mjErr.Description)
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}
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if midjourneyModel == "" {
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if !success {
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return nil, false, fmt.Errorf("%s", i18n.T(c, i18n.MsgDistributorInvalidParseModel))
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} else {
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// task fetch, task fetch by condition, notify
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shouldSelectChannel = false
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}
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}
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modelRequest.Model = midjourneyModel
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}
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c.Set("relay_mode", relayMode)
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} else if strings.Contains(c.Request.URL.Path, "/suno/") {
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relayMode := relayconstant.Path2RelaySuno(c.Request.Method, c.Request.URL.Path)
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if relayMode == relayconstant.RelayModeSunoFetch ||
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relayMode == relayconstant.RelayModeSunoFetchByID {
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shouldSelectChannel = false
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} else {
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modelName := service.CoverTaskActionToModelName(constant.TaskPlatformSuno, c.Param("action"))
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modelRequest.Model = modelName
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}
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c.Set("platform", string(constant.TaskPlatformSuno))
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c.Set("relay_mode", relayMode)
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} else if strings.Contains(c.Request.URL.Path, "/v1/videos/") && strings.HasSuffix(c.Request.URL.Path, "/remix") {
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relayMode := relayconstant.RelayModeVideoSubmit
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c.Set("relay_mode", relayMode)
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shouldSelectChannel = false
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} else if strings.Contains(c.Request.URL.Path, "/v1/videos") {
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//curl https://api.openai.com/v1/videos \
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// -H "Authorization: Bearer $OPENAI_API_KEY" \
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// -F "model=sora-2" \
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// -F "prompt=A calico cat playing a piano on stage"
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// -F input_reference="@image.jpg"
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relayMode := relayconstant.RelayModeUnknown
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if c.Request.Method == http.MethodPost {
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relayMode = relayconstant.RelayModeVideoSubmit
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req, err := getModelFromRequest(c)
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if err != nil {
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return nil, false, err
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}
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if req != nil {
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modelRequest.Model = req.Model
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}
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} else if c.Request.Method == http.MethodGet {
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relayMode = relayconstant.RelayModeVideoFetchByID
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shouldSelectChannel = false
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}
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c.Set("relay_mode", relayMode)
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} else if strings.Contains(c.Request.URL.Path, "/v1/video/generations") {
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relayMode := relayconstant.RelayModeUnknown
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if c.Request.Method == http.MethodPost {
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req, err := getModelFromRequest(c)
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if err != nil {
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return nil, false, err
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}
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modelRequest.Model = req.Model
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relayMode = relayconstant.RelayModeVideoSubmit
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} else if c.Request.Method == http.MethodGet {
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relayMode = relayconstant.RelayModeVideoFetchByID
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shouldSelectChannel = false
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}
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if _, ok := c.Get("relay_mode"); !ok {
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c.Set("relay_mode", relayMode)
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}
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} else if strings.HasPrefix(c.Request.URL.Path, "/v1beta/models/") || strings.HasPrefix(c.Request.URL.Path, "/v1/models/") {
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// Gemini API 路径处理: /v1beta/models/gemini-2.0-flash:generateContent
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relayMode := relayconstant.RelayModeGemini
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modelName := extractModelNameFromGeminiPath(c.Request.URL.Path)
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if modelName != "" {
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modelRequest.Model = modelName
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}
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c.Set("relay_mode", relayMode)
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} else if !strings.HasPrefix(c.Request.URL.Path, "/v1/audio/transcriptions") && !strings.Contains(c.Request.Header.Get("Content-Type"), "multipart/form-data") {
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req, err := getModelFromRequest(c)
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if err != nil {
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return nil, false, err
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}
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modelRequest.Model = req.Model
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}
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if strings.HasPrefix(c.Request.URL.Path, "/v1/realtime") {
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//wss://api.openai.com/v1/realtime?model=gpt-4o-realtime-preview-2024-10-01
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modelRequest.Model = c.Query("model")
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}
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if strings.HasPrefix(c.Request.URL.Path, "/v1/moderations") {
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if modelRequest.Model == "" {
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modelRequest.Model = "text-moderation-stable"
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}
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}
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if strings.HasSuffix(c.Request.URL.Path, "embeddings") {
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if modelRequest.Model == "" {
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modelRequest.Model = c.Param("model")
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}
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}
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if strings.HasPrefix(c.Request.URL.Path, "/v1/images/generations") {
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modelRequest.Model = common.GetStringIfEmpty(modelRequest.Model, "dall-e")
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} else if strings.HasPrefix(c.Request.URL.Path, "/v1/images/edits") {
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//modelRequest.Model = common.GetStringIfEmpty(c.PostForm("model"), "gpt-image-1")
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contentType := c.ContentType()
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if slices.Contains([]string{gin.MIMEPOSTForm, gin.MIMEMultipartPOSTForm}, contentType) {
|
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req, err := getModelFromRequest(c)
|
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if err == nil && req.Model != "" {
|
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modelRequest.Model = req.Model
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}
|
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}
|
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}
|
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if strings.HasPrefix(c.Request.URL.Path, "/v1/audio") {
|
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relayMode := relayconstant.RelayModeAudioSpeech
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if strings.HasPrefix(c.Request.URL.Path, "/v1/audio/speech") {
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modelRequest.Model = common.GetStringIfEmpty(modelRequest.Model, "tts-1")
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} else if strings.HasPrefix(c.Request.URL.Path, "/v1/audio/translations") {
|
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// 先尝试从请求读取
|
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if req, err := getModelFromRequest(c); err == nil && req.Model != "" {
|
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modelRequest.Model = req.Model
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}
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modelRequest.Model = common.GetStringIfEmpty(modelRequest.Model, "whisper-1")
|
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relayMode = relayconstant.RelayModeAudioTranslation
|
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} else if strings.HasPrefix(c.Request.URL.Path, "/v1/audio/transcriptions") {
|
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// 先尝试从请求读取
|
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if req, err := getModelFromRequest(c); err == nil && req.Model != "" {
|
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modelRequest.Model = req.Model
|
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}
|
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modelRequest.Model = common.GetStringIfEmpty(modelRequest.Model, "whisper-1")
|
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relayMode = relayconstant.RelayModeAudioTranscription
|
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}
|
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c.Set("relay_mode", relayMode)
|
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}
|
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if strings.HasPrefix(c.Request.URL.Path, "/pg/chat/completions") {
|
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// playground chat completions
|
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req, err := getModelFromRequest(c)
|
||
if err != nil {
|
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return nil, false, err
|
||
}
|
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modelRequest.Model = req.Model
|
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modelRequest.Group = req.Group
|
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common.SetContextKey(c, constant.ContextKeyTokenGroup, modelRequest.Group)
|
||
}
|
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|
||
if strings.HasPrefix(c.Request.URL.Path, "/v1/responses/compact") && modelRequest.Model != "" {
|
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modelRequest.Model = ratio_setting.WithCompactModelSuffix(modelRequest.Model)
|
||
}
|
||
return &modelRequest, shouldSelectChannel, nil
|
||
}
|
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|
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func SetupContextForSelectedChannel(c *gin.Context, channel *model.Channel, modelName string) *types.NewAPIError {
|
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c.Set("original_model", modelName) // for retry
|
||
if channel == nil {
|
||
return types.NewError(errors.New("channel is nil"), types.ErrorCodeGetChannelFailed, types.ErrOptionWithSkipRetry())
|
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}
|
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common.SetContextKey(c, constant.ContextKeyChannelId, channel.Id)
|
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common.SetContextKey(c, constant.ContextKeyChannelName, channel.Name)
|
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common.SetContextKey(c, constant.ContextKeyChannelType, channel.Type)
|
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common.SetContextKey(c, constant.ContextKeyChannelCreateTime, channel.CreatedTime)
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common.SetContextKey(c, constant.ContextKeyChannelSetting, channel.GetSetting())
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common.SetContextKey(c, constant.ContextKeyChannelOtherSetting, channel.GetOtherSettings())
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paramOverride := channel.GetParamOverride()
|
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headerOverride := channel.GetHeaderOverride()
|
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if mergedParam, applied := service.ApplyChannelAffinityOverrideTemplate(c, paramOverride); applied {
|
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paramOverride = mergedParam
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}
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common.SetContextKey(c, constant.ContextKeyChannelParamOverride, paramOverride)
|
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common.SetContextKey(c, constant.ContextKeyChannelHeaderOverride, headerOverride)
|
||
if nil != channel.OpenAIOrganization && *channel.OpenAIOrganization != "" {
|
||
common.SetContextKey(c, constant.ContextKeyChannelOrganization, *channel.OpenAIOrganization)
|
||
}
|
||
common.SetContextKey(c, constant.ContextKeyChannelAutoBan, channel.GetAutoBan())
|
||
common.SetContextKey(c, constant.ContextKeyChannelModelMapping, channel.GetModelMapping())
|
||
common.SetContextKey(c, constant.ContextKeyChannelStatusCodeMapping, channel.GetStatusCodeMapping())
|
||
|
||
key, index, newAPIError := channel.GetNextEnabledKey()
|
||
if newAPIError != nil {
|
||
return newAPIError
|
||
}
|
||
if channel.ChannelInfo.IsMultiKey {
|
||
common.SetContextKey(c, constant.ContextKeyChannelIsMultiKey, true)
|
||
common.SetContextKey(c, constant.ContextKeyChannelMultiKeyIndex, index)
|
||
} else {
|
||
// 必须设置为 false，否则在重试到单个 key 的时候会导致日志显示错误
|
||
common.SetContextKey(c, constant.ContextKeyChannelIsMultiKey, false)
|
||
}
|
||
// c.Request.Header.Set("Authorization", fmt.Sprintf("Bearer %s", key))
|
||
common.SetContextKey(c, constant.ContextKeyChannelKey, key)
|
||
common.SetContextKey(c, constant.ContextKeyChannelBaseUrl, channel.GetBaseURL())
|
||
|
||
common.SetContextKey(c, constant.ContextKeySystemPromptOverride, false)
|
||
|
||
// TODO: api_version统一
|
||
switch channel.Type {
|
||
case constant.ChannelTypeAzure:
|
||
c.Set("api_version", channel.Other)
|
||
case constant.ChannelTypeVertexAi:
|
||
c.Set("region", channel.Other)
|
||
case constant.ChannelTypeXunfei:
|
||
c.Set("api_version", channel.Other)
|
||
case constant.ChannelTypeGemini:
|
||
c.Set("api_version", channel.Other)
|
||
case constant.ChannelTypeAli:
|
||
c.Set("plugin", channel.Other)
|
||
case constant.ChannelCloudflare:
|
||
c.Set("api_version", channel.Other)
|
||
case constant.ChannelTypeMokaAI:
|
||
c.Set("api_version", channel.Other)
|
||
case constant.ChannelTypeCoze:
|
||
c.Set("bot_id", channel.Other)
|
||
}
|
||
return nil
|
||
}
|
||
|
||
// extractModelNameFromGeminiPath 从 Gemini API URL 路径中提取模型名
|
||
// 输入格式: /v1beta/models/gemini-2.0-flash:generateContent
|
||
// 输出: gemini-2.0-flash
|
||
func extractModelNameFromGeminiPath(path string) string {
|
||
// 查找 "/models/" 的位置
|
||
modelsPrefix := "/models/"
|
||
modelsIndex := strings.Index(path, modelsPrefix)
|
||
if modelsIndex == -1 {
|
||
return ""
|
||
}
|
||
|
||
// 从 "/models/" 之后开始提取
|
||
startIndex := modelsIndex + len(modelsPrefix)
|
||
if startIndex >= len(path) {
|
||
return ""
|
||
}
|
||
|
||
// 查找 ":" 的位置，模型名在 ":" 之前
|
||
colonIndex := strings.Index(path[startIndex:], ":")
|
||
if colonIndex == -1 {
|
||
// 如果没有找到 ":"，返回从 "/models/" 到路径结尾的部分
|
||
return path[startIndex:]
|
||
}
|
||
|
||
// 返回模型名部分
|
||
return path[startIndex : startIndex+colonIndex]
|
||
}
|