266 lines
9.2 KiB
Go
266 lines
9.2 KiB
Go
package service
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import (
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"errors"
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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/logger"
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"github.com/QuantumNous/new-api/model"
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"github.com/QuantumNous/new-api/pkg/jsplugin"
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"github.com/gin-gonic/gin"
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)
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func GetChannelConstraints(c *gin.Context) *dto.ChannelConstraints {
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if c == nil {
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return &dto.ChannelConstraints{}
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}
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if existing, ok := common.GetContextKeyType[*dto.ChannelConstraints](c, constant.ContextKeyChannelConstraints); ok && existing != nil {
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return existing
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}
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constraints := &dto.ChannelConstraints{}
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common.SetContextKey(c, constant.ContextKeyChannelConstraints, constraints)
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return constraints
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}
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func AppendTaskPluginIdentityFilter(c *gin.Context, pluginKey string) {
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if c == nil {
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return
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}
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GetChannelConstraints(c).AddFilter(dto.ChannelFilter{
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Kind: dto.FilterTaskPluginIdentity,
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TaskPluginKey: pluginKey,
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TaskPluginChannelTypes: pinnedTaskPluginChannelTypes(c, pluginKey),
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})
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}
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type RetryParam struct {
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Ctx *gin.Context
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TokenGroup string
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ModelName string
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RequestPath string
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Retry *int
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resetNextTry bool
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}
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func (p *RetryParam) GetRetry() int {
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if p.Retry == nil {
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return 0
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}
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return *p.Retry
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}
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func (p *RetryParam) SetRetry(retry int) {
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p.Retry = &retry
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}
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func (p *RetryParam) IncreaseRetry() {
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if p.resetNextTry {
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p.resetNextTry = false
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return
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}
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if p.Retry == nil {
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p.Retry = new(int)
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}
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*p.Retry++
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}
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func (p *RetryParam) ResetRetryNextTry() {
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p.resetNextTry = true
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}
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// CacheGetRandomSatisfiedChannel tries to get a random channel that satisfies the requirements.
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// 尝试获取一个满足要求的随机渠道。
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//
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// For ordered Auto groups or a fixed token group with a backup group:
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// 对于有序 Auto 分组，或配置了备用分组的固定令牌分组：
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//
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// - Each group will exhaust all its priorities before moving to the next group.
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// 每个分组会用完所有优先级后才会切换到下一个分组。
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//
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// - Uses ContextKeyAutoGroupIndex to track current group index.
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// 使用 ContextKeyAutoGroupIndex 跟踪当前分组索引。
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//
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// - Uses ContextKeyAutoGroupRetryIndex to track the global Retry count when current group started.
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// 使用 ContextKeyAutoGroupRetryIndex 跟踪当前分组开始时的全局重试次数。
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//
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// - priorityRetry = Retry - startRetryIndex, represents the priority level within current group.
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// priorityRetry = Retry - startRetryIndex，表示当前分组内的优先级级别。
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//
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// - When GetRandomSatisfiedChannel returns nil (priorities exhausted), moves to next group.
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// 当 GetRandomSatisfiedChannel 返回 nil（优先级用完）时，切换到下一个分组。
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//
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// Example flow (2 groups, each with 2 priorities, RetryTimes=3):
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// 示例流程（2个分组，每个有2个优先级，RetryTimes=3）：
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//
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// Retry=0: GroupA, priority0 (startRetryIndex=0, priorityRetry=0)
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// 分组A, 优先级0
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//
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// Retry=1: GroupA, priority1 (startRetryIndex=0, priorityRetry=1)
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// 分组A, 优先级1
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//
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// Retry=2: GroupA exhausted → GroupB, priority0 (startRetryIndex=2, priorityRetry=0)
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// 分组A用完 → 分组B, 优先级0
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//
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// Retry=3: GroupB, priority1 (startRetryIndex=2, priorityRetry=1)
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// 分组B, 优先级1
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func CacheGetRandomSatisfiedChannel(param *RetryParam) (*model.Channel, string, error) {
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var channel *model.Channel
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var err error
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selectGroup := param.TokenGroup
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userGroup := common.GetContextKeyString(param.Ctx, constant.ContextKeyUserGroup)
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filters := GetChannelConstraints(param.Ctx).Filters
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crossGroupRetry := common.GetContextKeyBool(param.Ctx, constant.ContextKeyTokenCrossGroupRetry)
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orderedGroups := make([]string, 0)
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if param.TokenGroup == "auto" {
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orderedGroups = GetRequestAutoGroups(param.Ctx, userGroup)
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if len(orderedGroups) == 0 {
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return nil, selectGroup, errors.New("auto groups is not enabled")
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}
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} else if crossGroupRetry {
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if value, exists := common.GetContextKey(param.Ctx, constant.ContextKeyTokenAutoGroups); exists {
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if backupGroups, ok := value.([]string); ok {
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orderedGroups = append(orderedGroups, param.TokenGroup)
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for _, group := range FilterUserTokenAutoGroups(userGroup, backupGroups) {
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if group != param.TokenGroup {
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orderedGroups = append(orderedGroups, group)
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}
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}
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}
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}
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}
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if len(orderedGroups) > 0 {
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// startGroupIndex: the group index to start searching from
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// startGroupIndex: 开始搜索的分组索引
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startGroupIndex := 0
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if lastGroupIndex, exists := common.GetContextKey(param.Ctx, constant.ContextKeyAutoGroupIndex); exists {
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if idx, ok := lastGroupIndex.(int); ok {
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startGroupIndex = idx
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}
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}
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for i := startGroupIndex; i < len(orderedGroups); i++ {
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autoGroup := orderedGroups[i]
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// Calculate priorityRetry for current group
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// 计算当前分组的 priorityRetry
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priorityRetry := param.GetRetry()
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// If moved to a new group, reset priorityRetry and update startRetryIndex
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// 如果切换到新分组，重置 priorityRetry 并更新 startRetryIndex
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if i > startGroupIndex {
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priorityRetry = 0
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}
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logger.LogDebug(param.Ctx, "Auto selecting group: %s, priorityRetry: %d", autoGroup, priorityRetry)
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channel, _ = model.GetRandomSatisfiedChannel(
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autoGroup,
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param.ModelName,
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priorityRetry,
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filters,
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)
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if channel == nil {
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// Current group has no available channel for this model, try next group
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// 当前分组没有该模型的可用渠道，尝试下一个分组
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logger.LogDebug(param.Ctx, "No available channel in group %s for model %s at priorityRetry %d, trying next group", autoGroup, param.ModelName, priorityRetry)
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// 重置状态以尝试下一个分组
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common.SetContextKey(param.Ctx, constant.ContextKeyAutoGroupIndex, i+1)
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common.SetContextKey(param.Ctx, constant.ContextKeyAutoGroupRetryIndex, 0)
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// Reset retry counter so outer loop can continue for next group
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// 重置重试计数器，以便外层循环可以为下一个分组继续
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param.SetRetry(0)
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continue
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}
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common.SetContextKey(param.Ctx, constant.ContextKeyAutoGroup, autoGroup)
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selectGroup = autoGroup
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logger.LogDebug(param.Ctx, "Auto selected group: %s", autoGroup)
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// Prepare state for next retry
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// 为下一次重试准备状态
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if crossGroupRetry && priorityRetry >= common.RetryTimes {
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// Current group has exhausted all retries, prepare to switch to next group
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// This request still uses current group, but next retry will use next group
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// 当前分组已用完所有重试次数，准备切换到下一个分组
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// 本次请求仍使用当前分组，但下次重试将使用下一个分组
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logger.LogDebug(param.Ctx, "Current group %s retries exhausted (priorityRetry=%d >= RetryTimes=%d), preparing switch to next group for next retry", autoGroup, priorityRetry, common.RetryTimes)
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common.SetContextKey(param.Ctx, constant.ContextKeyAutoGroupIndex, i+1)
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// Reset retry counter so outer loop can continue for next group
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// 重置重试计数器，以便外层循环可以为下一个分组继续
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param.SetRetry(0)
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param.ResetRetryNextTry()
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} else {
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// Stay in current group, save current state
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// 保持在当前分组，保存当前状态
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common.SetContextKey(param.Ctx, constant.ContextKeyAutoGroupIndex, i)
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}
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break
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}
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} else {
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channel, err = model.GetRandomSatisfiedChannel(
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param.TokenGroup,
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param.ModelName,
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param.GetRetry(),
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filters,
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)
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if err != nil {
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return nil, param.TokenGroup, err
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}
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}
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return channel, selectGroup, nil
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}
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func pinnedTaskPluginChannelTypes(c *gin.Context, expected string) []int {
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if c == nil || expected == "" {
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return nil
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}
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if value, exists := c.Get(jsplugin.ContextKeyPinnedEndpoint); exists {
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pinned, ok := value.(jsplugin.PinnedEndpoint)
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if ok && pinned.Generation != nil && len(pinned.Candidates) > 1 {
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expectedFound := false
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channelTypes := make([]int, 0, len(pinned.Candidates))
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seen := make(map[int]struct{}, len(pinned.Candidates))
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for _, candidate := range pinned.Candidates {
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if candidate.Plugin == nil {
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continue
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}
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if candidate.Plugin.Meta.Key == expected {
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expectedFound = true
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}
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for _, channelType := range candidate.Plugin.Meta.ChannelTypes {
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if channelType == 0 || channelType == constant.ChannelTypeTaskPlugin {
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continue
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}
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if _, duplicate := seen[channelType]; duplicate {
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continue
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}
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if plugin, indexed := pinned.Generation.GetByChannelType(channelType); indexed && plugin == candidate.Plugin {
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seen[channelType] = struct{}{}
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channelTypes = append(channelTypes, channelType)
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}
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}
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}
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if expectedFound {
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return channelTypes
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}
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}
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}
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value, exists := c.Get(jsplugin.ContextKeyPinnedPlugin)
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pinned, ok := value.(jsplugin.PinnedPlugin)
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if !exists || !ok || pinned.Generation == nil || pinned.Plugin == nil || pinned.Plugin.Meta.Key != expected {
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return nil
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}
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channelTypes := make([]int, 0, len(pinned.Plugin.Meta.ChannelTypes))
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for _, channelType := range pinned.Plugin.Meta.ChannelTypes {
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if channelType == 0 || channelType == constant.ChannelTypeTaskPlugin {
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continue
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}
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channelTypes = append(channelTypes, channelType)
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}
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if len(channelTypes) == 0 {
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return nil
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}
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return channelTypes
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}
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