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package middleware
import (
"fmt"
"net/http"
"one-api/common"
"one-api/model"
"strconv"
"strings"
"github.com/gin-gonic/gin"
)
type ModelRequest struct {
Model string `json:"model"`
}
func Distribute() func(c *gin.Context) {
return func(c *gin.Context) {
userId := c.GetInt("id")
userGroup, _ := model.CacheGetUserGroup(userId)
c.Set("group", userGroup)
var channel *model.Channel
channelId, ok := c.Get("channelId")
if ok {
id, err := strconv.Atoi(channelId.(string))
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{
"error": gin.H{
"message": "无效的渠道 ID",
"type": "one_api_error",
},
})
c.Abort()
return
}
channel, err = model.GetChannelById(id, true)
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{
"error": gin.H{
"message": "无效的渠道 ID",
"type": "one_api_error",
},
})
c.Abort()
return
}
if channel.Status != common.ChannelStatusEnabled {
c.JSON(http.StatusForbidden, gin.H{
"error": gin.H{
"message": "该渠道已被禁用",
"type": "one_api_error",
},
})
c.Abort()
return
}
} else {
// Select a channel for the user
var modelRequest ModelRequest
var err error
if !strings.HasPrefix(c.Request.URL.Path, "/v1/audio") {
err = common.UnmarshalBodyReusable(c, &modelRequest)
}
if err != nil {
c.JSON(http.StatusBadRequest, gin.H{
"error": gin.H{
"message": "无效的请求",
"type": "one_api_error",
},
})
c.Abort()
return
}
if strings.HasPrefix(c.Request.URL.Path, "/v1/moderations") {
if modelRequest.Model == "" {
modelRequest.Model = "text-moderation-stable"
}
}
if strings.HasSuffix(c.Request.URL.Path, "embeddings") {
if modelRequest.Model == "" {
modelRequest.Model = c.Param("model")
}
}
if strings.HasPrefix(c.Request.URL.Path, "/v1/images/generations") {
if modelRequest.Model == "" {
modelRequest.Model = "dall-e"
}
}
if strings.HasPrefix(c.Request.URL.Path, "/v1/audio") {
if modelRequest.Model == "" {
modelRequest.Model = "whisper-1"
}
}
channel, err = model.CacheGetRandomSatisfiedChannel(userGroup, modelRequest.Model)
if err != nil {
message := fmt.Sprintf("当前分组 %s 下对于模型 %s 无可用渠道", userGroup, modelRequest.Model)
if channel != nil {
common.SysError(fmt.Sprintf("渠道不存在：%d", channel.Id))
message = "数据库一致性已被破坏，请联系管理员"
}
c.JSON(http.StatusServiceUnavailable, gin.H{
"error": gin.H{
"message": message,
"type": "one_api_error",
},
})
c.Abort()
return
}
}
c.Set("channel", channel.Type)
c.Set("channel_id", channel.Id)
c.Set("channel_name", channel.Name)
c.Set("model_mapping", channel.ModelMapping)
c.Request.Header.Set("Authorization", fmt.Sprintf("Bearer %s", channel.Key))
c.Set("base_url", channel.BaseURL)
if channel.Type == common.ChannelTypeAzure || channel.Type == common.ChannelTypeXunfei {
c.Set("api_version", channel.Other)
}
c.Next()
}
}
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