264 lines
9.4 KiB
Go
264 lines
9.4 KiB
Go
package app
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import (
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"context"
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"encoding/json"
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"errors"
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"net/http"
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"sort"
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"strings"
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"yingce/backend/internal/model"
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)
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type ChannelModelsRequest struct {
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BaseURL string `json:"baseUrl"`
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APIKey string `json:"apiKey"`
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APIFormat string `json:"apiFormat"`
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Headers []OutboundHeader `json:"headers"`
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}
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type channelModelsPayload struct {
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Data []channelModelItem `json:"data"`
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Models []channelModelItem `json:"models"`
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Error *providerError `json:"error"`
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Code *int `json:"code"`
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Msg string `json:"msg"`
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}
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type channelModelItem struct {
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ID string `json:"id"`
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Name string `json:"name"`
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DisplayName string `json:"display_name"`
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ModelType string `json:"model_type"`
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SupportedEndpointTypes []string `json:"supported_endpoint_types"`
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DefaultParameters channelModelCatalogParameters `json:"default_parameters"`
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Options channelModelCatalogOptions `json:"options"`
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SupportsImages *bool `json:"supports_images"`
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MinImages *int `json:"min_images"`
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MaxImages *int `json:"max_images"`
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}
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type channelModelCatalogParameters struct {
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AspectRatio string `json:"aspect_ratio"`
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DurationSeconds string `json:"duration_seconds"`
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Resolution string `json:"resolution"`
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}
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type channelModelCatalogOptions struct {
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AspectRatio []ChannelModelCatalogOption `json:"aspect_ratio"`
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DurationSeconds []ChannelModelCatalogOption `json:"duration_seconds"`
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Resolution []ChannelModelCatalogOption `json:"resolution"`
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}
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func (s *Service) FetchChannelModels(ctx context.Context, actor *model.User, input ChannelModelsRequest) ([]string, error) {
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items, err := s.FetchChannelModelCatalog(ctx, actor, input)
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if err != nil {
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return nil, err
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}
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seen := make(map[string]bool, len(items))
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models := make([]string, 0, len(items))
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for _, item := range items {
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name := strings.TrimSpace(item.ID)
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if name == "" || seen[name] {
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continue
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}
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seen[name] = true
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models = append(models, name)
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}
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sort.Strings(models)
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return models, nil
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}
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// ChannelModelCatalogItem 是前端自定义渠道拉取模型目录后的最小合同；
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// 协议、能力和可选参数均来自上游公开元数据，不展开供应商内部兼容模型。
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type ChannelModelCatalogItem struct {
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ID string `json:"id"`
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DisplayName string `json:"displayName,omitempty"`
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ModelType string `json:"modelType,omitempty"`
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SupportedEndpointTypes []string `json:"supportedEndpointTypes,omitempty"`
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DefaultParameters ChannelModelCatalogDefaultParameters `json:"defaultParameters,omitempty"`
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Options ChannelModelCatalogOptions `json:"options,omitempty"`
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SupportsImages *bool `json:"supportsImages,omitempty"`
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MinImages *int `json:"minImages,omitempty"`
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MaxImages *int `json:"maxImages,omitempty"`
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}
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type ChannelModelCatalogDefaultParameters struct {
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AspectRatio string `json:"aspectRatio,omitempty"`
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DurationSeconds string `json:"durationSeconds,omitempty"`
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Resolution string `json:"resolution,omitempty"`
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}
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type ChannelModelCatalogOptions struct {
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AspectRatio []ChannelModelCatalogOption `json:"aspectRatio,omitempty"`
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DurationSeconds []ChannelModelCatalogOption `json:"durationSeconds,omitempty"`
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Resolution []ChannelModelCatalogOption `json:"resolution,omitempty"`
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}
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type ChannelModelCatalogOption struct {
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Value string `json:"value"`
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Label string `json:"label,omitempty"`
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}
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func (s *Service) FetchChannelModelCatalog(ctx context.Context, actor *model.User, input ChannelModelsRequest) ([]ChannelModelCatalogItem, error) {
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if actor == nil || strings.TrimSpace(actor.ID) == "" {
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return nil, Unauthorized("请先登录")
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}
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baseURL := strings.TrimRight(strings.TrimSpace(input.BaseURL), "/")
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apiKey := strings.TrimSpace(input.APIKey)
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if baseURL == "" {
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return nil, BadAuthRequest("请填写 Base URL")
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}
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if apiKey == "" {
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return nil, BadAuthRequest("请填写 API Key")
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}
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apiFormat := strings.ToLower(strings.TrimSpace(input.APIFormat))
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if apiFormat == "" {
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apiFormat = "openai"
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}
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if apiFormat != "openai" && apiFormat != "gemini" {
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return nil, BadAuthRequest("接口协议不支持拉取模型")
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}
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headers, err := NormalizeOutboundHeaders(input.Headers)
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if err != nil {
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return nil, err
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}
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target := apiURL(baseURL, "/models")
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if apiFormat == "gemini" {
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if !strings.HasSuffix(strings.ToLower(baseURL), "/v1beta") {
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baseURL += "/v1beta"
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}
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target = baseURL + "/models"
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}
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if _, err := ValidateOutboundURL(target); err != nil {
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return nil, err
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}
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request, err := http.NewRequestWithContext(ctx, http.MethodGet, target, nil)
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if err != nil {
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return nil, BadAuthRequest("模型服务地址无效")
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}
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if apiFormat == "gemini" {
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request.Header.Set("x-goog-api-key", apiKey)
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} else {
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request.Header.Set("Authorization", "Bearer "+apiKey)
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}
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ApplyOutboundHeaders(request, headers)
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// 只代理固定的模型目录 GET；用户密钥仅用于本次请求，不写入数据库或日志。
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data, _, err := doBinary(request)
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if err != nil {
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return nil, channelModelsUpstreamError(err)
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}
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var payload channelModelsPayload
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if err := json.Unmarshal(data, &payload); err != nil {
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return nil, WrapAppError(http.StatusBadGateway, "模型服务返回的不是有效 JSON", err)
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}
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if payload.Error != nil && strings.TrimSpace(payload.Error.Message) != "" {
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return nil, NewAppError(http.StatusBadGateway, "模型服务返回失败，请检查渠道配置")
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}
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if payload.Code != nil && *payload.Code != 0 {
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return nil, NewAppError(http.StatusBadGateway, "模型服务返回失败，请检查渠道配置")
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}
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items := payload.Data
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if apiFormat == "gemini" {
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items = payload.Models
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}
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seen := make(map[string]bool, len(items))
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catalog := make([]ChannelModelCatalogItem, 0, len(items))
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for _, item := range items {
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name := strings.TrimPrefix(strings.TrimSpace(firstNonEmpty(item.ID, item.Name)), "models/")
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if name == "" || seen[name] {
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continue
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}
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seen[name] = true
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catalog = append(catalog, ChannelModelCatalogItem{
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ID: name,
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DisplayName: strings.TrimSpace(item.DisplayName),
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ModelType: normalizeCatalogModelType(item.ModelType),
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SupportedEndpointTypes: normalizeCatalogEndpointTypes(item.SupportedEndpointTypes),
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DefaultParameters: ChannelModelCatalogDefaultParameters{
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AspectRatio: strings.TrimSpace(item.DefaultParameters.AspectRatio),
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DurationSeconds: strings.TrimSpace(item.DefaultParameters.DurationSeconds),
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Resolution: strings.TrimSpace(item.DefaultParameters.Resolution),
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},
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Options: ChannelModelCatalogOptions{
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AspectRatio: normalizeCatalogOptions(item.Options.AspectRatio),
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DurationSeconds: normalizeCatalogOptions(item.Options.DurationSeconds),
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Resolution: normalizeCatalogOptions(item.Options.Resolution),
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},
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SupportsImages: item.SupportsImages,
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MinImages: item.MinImages,
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MaxImages: item.MaxImages,
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})
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}
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sort.Slice(catalog, func(left int, right int) bool {
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return catalog[left].ID < catalog[right].ID
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})
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if s.isPluginEnabled() {
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catalog = extendChannelModelCatalog(baseURL, apiFormat, headers, catalog)
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}
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return catalog, nil
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}
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func normalizeCatalogModelType(value string) string {
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normalized := strings.ToLower(strings.TrimSpace(value))
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switch normalized {
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case "text", "image", "video", "audio":
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return normalized
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default:
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return ""
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}
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}
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func normalizeCatalogOptions(options []ChannelModelCatalogOption) []ChannelModelCatalogOption {
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seen := make(map[string]bool, len(options))
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normalized := make([]ChannelModelCatalogOption, 0, len(options))
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for _, option := range options {
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value := strings.TrimSpace(option.Value)
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if value == "" || seen[value] {
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continue
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}
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seen[value] = true
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normalized = append(normalized, ChannelModelCatalogOption{Value: value, Label: strings.TrimSpace(option.Label)})
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}
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return normalized
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}
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func normalizeCatalogEndpointTypes(values []string) []string {
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seen := make(map[string]bool, len(values))
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normalized := make([]string, 0, len(values))
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for _, value := range values {
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item := strings.TrimSpace(value)
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if item == "" || seen[item] {
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continue
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}
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seen[item] = true
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normalized = append(normalized, item)
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}
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return normalized
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}
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func channelModelsUpstreamError(err error) error {
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var authErr *AuthError
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if errors.As(err, &authErr) {
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return authErr
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}
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var httpErr providerHTTPError
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if !errors.As(err, &httpErr) {
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return WrapAppError(http.StatusBadGateway, "连接模型服务失败，请检查渠道地址和网络", err)
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}
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switch httpErr.StatusCode {
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case http.StatusUnauthorized, http.StatusForbidden:
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return NewAppError(http.StatusBadGateway, "模型服务鉴权失败，请检查 API Key")
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case http.StatusNotFound:
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return NewAppError(http.StatusBadGateway, "模型服务未提供 /models 接口")
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case http.StatusTooManyRequests:
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return NewAppError(http.StatusBadGateway, "模型服务请求过于频繁或额度不足")
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default:
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return WrapAppError(http.StatusBadGateway, httpErr.Error(), err)
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}
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}
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