Merge branch 'main' into pr/Laisky/25

middleware/auth.go

@@ -1,12 +1,17 @@
 package middleware
 
 import (
+	"fmt"
+	"net/http"
+	"strings"
+
 	"github.com/gin-contrib/sessions"
 	"github.com/gin-gonic/gin"
-	"net/http"
-	"one-api/common"
-	"one-api/model"
-	"strings"
+	"github.com/songquanpeng/one-api/common/blacklist"
+	"github.com/songquanpeng/one-api/common/ctxkey"
+	"github.com/songquanpeng/one-api/common/logger"
+	"github.com/songquanpeng/one-api/common/network"
+	"github.com/songquanpeng/one-api/model"
 )
 
 func authHelper(c *gin.Context, minRole int) {
@@ -16,6 +21,7 @@ func authHelper(c *gin.Context, minRole int) {
 	id := session.Get("id")
 	status := session.Get("status")
 	if username == nil {
+		logger.SysLog("no user session found, try to use access token")
 		// Check access token
 		accessToken := c.Request.Header.Get("Authorization")
 		if accessToken == "" {
@@ -26,6 +32,7 @@ func authHelper(c *gin.Context, minRole int) {
 			c.Abort()
 			return
 		}
+
 		user := model.ValidateAccessToken(accessToken)
 		if user != nil && user.Username != "" {
 			// Token is valid
@@ -42,11 +49,14 @@ func authHelper(c *gin.Context, minRole int) {
 			return
 		}
 	}
-	if status.(int) == common.UserStatusDisabled {
+	if status.(int) == model.UserStatusDisabled || blacklist.IsUserBanned(id.(int)) {
 		c.JSON(http.StatusOK, gin.H{
 			"success": false,
 			"message": "用户已被封禁",
 		})
+		session := sessions.Default(c)
+		session.Clear()
+		_ = session.Save()
 		c.Abort()
 		return
 	}
@@ -66,27 +76,28 @@ func authHelper(c *gin.Context, minRole int) {
 
 func UserAuth() func(c *gin.Context) {
 	return func(c *gin.Context) {
-		authHelper(c, common.RoleCommonUser)
+		authHelper(c, model.RoleCommonUser)
 	}
 }
 
 func AdminAuth() func(c *gin.Context) {
 	return func(c *gin.Context) {
-		authHelper(c, common.RoleAdminUser)
+		authHelper(c, model.RoleAdminUser)
 	}
 }
 
 func RootAuth() func(c *gin.Context) {
 	return func(c *gin.Context) {
-		authHelper(c, common.RoleRootUser)
+		authHelper(c, model.RoleRootUser)
 	}
 }
 
 func TokenAuth() func(c *gin.Context) {
 	return func(c *gin.Context) {
+		ctx := c.Request.Context()
 		key := c.Request.Header.Get("Authorization")
 		key = strings.TrimPrefix(key, "Bearer ")
-		key = strings.TrimPrefix(key, "sk-")
+		key = strings.TrimPrefix(strings.TrimPrefix(key, "sk-"), "laisky-")
 		parts := strings.Split(key, "-")
 		key = parts[0]
 		token, err := model.ValidateUserToken(key)
@@ -94,30 +105,71 @@ func TokenAuth() func(c *gin.Context) {
 			abortWithMessage(c, http.StatusUnauthorized, err.Error())
 			return
 		}
+		if token.Subnet != nil && *token.Subnet != "" {
+			if !network.IsIpInSubnets(ctx, c.ClientIP(), *token.Subnet) {
+				abortWithMessage(c, http.StatusForbidden, fmt.Sprintf("该令牌只能在指定网段使用：%s，当前 ip：%s", *token.Subnet, c.ClientIP()))
+				return
+			}
+		}
 		userEnabled, err := model.CacheIsUserEnabled(token.UserId)
 		if err != nil {
 			abortWithMessage(c, http.StatusInternalServerError, err.Error())
 			return
 		}
-		if !userEnabled {
+		if !userEnabled || blacklist.IsUserBanned(token.UserId) {
 			abortWithMessage(c, http.StatusForbidden, "用户已被封禁")
 			return
 		}
-		c.Set("id", token.UserId)
-		c.Set("token_id", token.Id)
-		c.Set("token_name", token.Name)
-		c.Set("token_unlimited_quota", token.UnlimitedQuota)
-		if !token.UnlimitedQuota {
-			c.Set("token_quota", token.RemainQuota)
+		requestModel, err := getRequestModel(c)
+		if err != nil && shouldCheckModel(c) {
+			abortWithMessage(c, http.StatusBadRequest, err.Error())
+			return
 		}
+		c.Set(ctxkey.RequestModel, requestModel)
+		if token.Models != nil && *token.Models != "" {
+			c.Set(ctxkey.AvailableModels, *token.Models)
+			if requestModel != "" && !isModelInList(requestModel, *token.Models) {
+				abortWithMessage(c, http.StatusForbidden, fmt.Sprintf("该令牌无权使用模型：%s", requestModel))
+				return
+			}
+		}
+
+		c.Set(ctxkey.Id, token.UserId)
+		c.Set(ctxkey.TokenId, token.Id)
+		c.Set(ctxkey.TokenName, token.Name)
+		c.Set(ctxkey.TokenQuota, token.RemainQuota)
+		c.Set(ctxkey.TokenQuotaUnlimited, token.UnlimitedQuota)
+
 		if len(parts) > 1 {
 			if model.IsAdmin(token.UserId) {
-				c.Set("channelId", parts[1])
+				c.Set(ctxkey.SpecificChannelId, parts[1])
 			} else {
 				abortWithMessage(c, http.StatusForbidden, "普通用户不支持指定渠道")
 				return
 			}
 		}
+
+		// set channel id for proxy relay
+		if channelId := c.Param("channelid"); channelId != "" {
+			c.Set(ctxkey.SpecificChannelId, channelId)
+		}
+
 		c.Next()
 	}
 }
+
+func shouldCheckModel(c *gin.Context) bool {
+	if strings.HasPrefix(c.Request.URL.Path, "/v1/completions") {
+		return true
+	}
+	if strings.HasPrefix(c.Request.URL.Path, "/v1/chat/completions") {
+		return true
+	}
+	if strings.HasPrefix(c.Request.URL.Path, "/v1/images") {
+		return true
+	}
+	if strings.HasPrefix(c.Request.URL.Path, "/v1/audio") {
+		return true
+	}
+	return false
+}

middleware/distributor.go

@@ -3,25 +3,30 @@ package middleware
 import (
 	"fmt"
 	"net/http"
-	"one-api/common"
-	"one-api/model"
 	"strconv"
 	"strings"
 
+	gutils "github.com/Laisky/go-utils/v4"
 	"github.com/gin-gonic/gin"
+	"github.com/songquanpeng/one-api/common/ctxkey"
+	"github.com/songquanpeng/one-api/common/logger"
+	"github.com/songquanpeng/one-api/model"
+	"github.com/songquanpeng/one-api/relay/billing/ratio"
+	"github.com/songquanpeng/one-api/relay/channeltype"
 )
 
 type ModelRequest struct {
-	Model string `json:"model"`
+	Model string `json:"model" form:"model"`
 }
 
 func Distribute() func(c *gin.Context) {
 	return func(c *gin.Context) {
-		userId := c.GetInt("id")
+		userId := c.GetInt(ctxkey.Id)
 		userGroup, _ := model.CacheGetUserGroup(userId)
-		c.Set("group", userGroup)
+		c.Set(ctxkey.Group, userGroup)
+		var requestModel string
 		var channel *model.Channel
-		channelId, ok := c.Get("channelId")
+		channelId, ok := c.Get(ctxkey.SpecificChannelId)
 		if ok {
 			id, err := strconv.Atoi(channelId.(string))
 			if err != nil {
@@ -33,67 +38,85 @@ func Distribute() func(c *gin.Context) {
 				abortWithMessage(c, http.StatusBadRequest, "无效的渠道 Id")
 				return
 			}
-			if channel.Status != common.ChannelStatusEnabled {
+			if channel.Status != model.ChannelStatusEnabled {
 				abortWithMessage(c, http.StatusForbidden, "该渠道已被禁用")
 				return
 			}
 		} else {
-			// Select a channel for the user
-			var modelRequest ModelRequest
-			err := common.UnmarshalBodyReusable(c, &modelRequest)
+			requestModel = c.GetString(ctxkey.RequestModel)
+			var err error
+			channel, err = model.CacheGetRandomSatisfiedChannel(userGroup, requestModel, false)
 			if err != nil {
-				abortWithMessage(c, http.StatusBadRequest, "无效的请求")
-				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-2"
-				}
-			}
-			if strings.HasPrefix(c.Request.URL.Path, "/v1/audio/transcriptions") || strings.HasPrefix(c.Request.URL.Path, "/v1/audio/translations") {
-				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)
+				message := fmt.Sprintf("当前分组 %s 下对于模型 %s 无可用渠道", userGroup, requestModel)
 				if channel != nil {
-					common.SysError(fmt.Sprintf("渠道不存在：%d", channel.Id))
+					logger.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"
 				}
 				abortWithMessage(c, http.StatusServiceUnavailable, message)
 				return
 			}
 		}
-		c.Set("channel", channel.Type)
-		c.Set("channel_id", channel.Id)
-		c.Set("channel_name", channel.Name)
-		c.Set("model_mapping", channel.GetModelMapping())
-		c.Request.Header.Set("Authorization", fmt.Sprintf("Bearer %s", channel.Key))
-		c.Set("base_url", channel.GetBaseURL())
-		switch channel.Type {
-		case common.ChannelTypeAzure:
-			c.Set("api_version", channel.Other)
-		case common.ChannelTypeXunfei:
-			c.Set("api_version", channel.Other)
-		case common.ChannelTypeGemini:
-			c.Set("api_version", channel.Other)
-		case common.ChannelTypeAIProxyLibrary:
-			c.Set("library_id", channel.Other)
-		case common.ChannelTypeAli:
-			c.Set("plugin", channel.Other)
-		}
+		SetupContextForSelectedChannel(c, channel, requestModel)
 		c.Next()
 	}
 }
+
+func SetupContextForSelectedChannel(c *gin.Context, channel *model.Channel, modelName string) {
+	// one channel could relates to multiple groups,
+	// and each groud has individual ratio,
+	// set minimal group ratio as channel_ratio
+	var minimalRatio float64 = -1
+	for _, grp := range strings.Split(channel.Group, ",") {
+		v := ratio.GetGroupRatio(grp)
+		if minimalRatio < 0 || v < minimalRatio {
+			minimalRatio = v
+		}
+	}
+	logger.Info(c.Request.Context(), fmt.Sprintf("set channel %s ratio to %f", channel.Name, minimalRatio))
+	c.Set(ctxkey.ChannelRatio, minimalRatio)
+	c.Set(ctxkey.ChannelModel, channel)
+
+	// generate an unique cost id for each request
+	if _, ok := c.Get(ctxkey.RequestId); !ok {
+		c.Set(ctxkey.RequestId, gutils.UUID7())
+	}
+
+	c.Set(ctxkey.Channel, channel.Type)
+	c.Set(ctxkey.ChannelId, channel.Id)
+	c.Set(ctxkey.ChannelName, channel.Name)
+	c.Set(ctxkey.ContentType, c.Request.Header.Get("Content-Type"))
+	if channel.SystemPrompt != nil && *channel.SystemPrompt != "" {
+		c.Set(ctxkey.SystemPrompt, *channel.SystemPrompt)
+	}
+	c.Set(ctxkey.ModelMapping, channel.GetModelMapping())
+	c.Set(ctxkey.OriginalModel, modelName) // for retry
+	c.Request.Header.Set("Authorization", fmt.Sprintf("Bearer %s", channel.Key))
+	c.Set(ctxkey.BaseURL, channel.GetBaseURL())
+	cfg, _ := channel.LoadConfig()
+	// this is for backward compatibility
+	if channel.Other != nil {
+		switch channel.Type {
+		case channeltype.Azure:
+			if cfg.APIVersion == "" {
+				cfg.APIVersion = *channel.Other
+			}
+		case channeltype.Xunfei:
+			if cfg.APIVersion == "" {
+				cfg.APIVersion = *channel.Other
+			}
+		case channeltype.Gemini:
+			if cfg.APIVersion == "" {
+				cfg.APIVersion = *channel.Other
+			}
+		case channeltype.AIProxyLibrary:
+			if cfg.LibraryID == "" {
+				cfg.LibraryID = *channel.Other
+			}
+		case channeltype.Ali:
+			if cfg.Plugin == "" {
+				cfg.Plugin = *channel.Other
+			}
+		}
+	}
+	c.Set(ctxkey.Config, cfg)
+}

middleware/gzip.go

@@ -0,0 +1,27 @@
+package middleware
+
+import (
+	"compress/gzip"
+	"github.com/gin-gonic/gin"
+	"io"
+	"net/http"
+)
+
+func GzipDecodeMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if c.GetHeader("Content-Encoding") == "gzip" {
+			gzipReader, err := gzip.NewReader(c.Request.Body)
+			if err != nil {
+				c.AbortWithStatus(http.StatusBadRequest)
+				return
+			}
+			defer gzipReader.Close()
+
+			// Replace the request body with the decompressed data
+			c.Request.Body = io.NopCloser(gzipReader)
+		}
+
+		// Continue processing the request
+		c.Next()
+	}
+}

middleware/logger.go

@@ -2,15 +2,16 @@ package middleware
 
 import (
 	"fmt"
+
 	"github.com/gin-gonic/gin"
-	"one-api/common"
+	"github.com/songquanpeng/one-api/common/helper"
 )
 
 func SetUpLogger(server *gin.Engine) {
 	server.Use(gin.LoggerWithFormatter(func(param gin.LogFormatterParams) string {
 		var requestID string
 		if param.Keys != nil {
-			requestID = param.Keys[common.RequestIdKey].(string)
+			requestID = param.Keys[helper.RequestIdKey].(string)
 		}
 		return fmt.Sprintf("[GIN] %s | %s | %3d | %13v | %15s | %7s %s\n",
 			param.TimeStamp.Format("2006/01/02 - 15:04:05"),

middleware/rate-limit.go

@@ -3,10 +3,12 @@ package middleware
 import (
 	"context"
 	"fmt"
-	"github.com/gin-gonic/gin"
 	"net/http"
-	"one-api/common"
 	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/songquanpeng/one-api/common"
+	"github.com/songquanpeng/one-api/common/config"
 )
 
 var timeFormat = "2006-01-02T15:04:05.000Z"
@@ -26,7 +28,7 @@ func redisRateLimiter(c *gin.Context, maxRequestNum int, duration int64, mark st
 	}
 	if listLength < int64(maxRequestNum) {
 		rdb.LPush(ctx, key, time.Now().Format(timeFormat))
-		rdb.Expire(ctx, key, common.RateLimitKeyExpirationDuration)
+		rdb.Expire(ctx, key, config.RateLimitKeyExpirationDuration)
 	} else {
 		oldTimeStr, _ := rdb.LIndex(ctx, key, -1).Result()
 		oldTime, err := time.Parse(timeFormat, oldTimeStr)
@@ -47,14 +49,14 @@ func redisRateLimiter(c *gin.Context, maxRequestNum int, duration int64, mark st
 		// time.Since will return negative number!
 		// See: https://stackoverflow.com/questions/50970900/why-is-time-since-returning-negative-durations-on-windows
 		if int64(nowTime.Sub(oldTime).Seconds()) < duration {
-			rdb.Expire(ctx, key, common.RateLimitKeyExpirationDuration)
+			rdb.Expire(ctx, key, config.RateLimitKeyExpirationDuration)
 			c.Status(http.StatusTooManyRequests)
 			c.Abort()
 			return
 		} else {
 			rdb.LPush(ctx, key, time.Now().Format(timeFormat))
 			rdb.LTrim(ctx, key, 0, int64(maxRequestNum-1))
-			rdb.Expire(ctx, key, common.RateLimitKeyExpirationDuration)
+			rdb.Expire(ctx, key, config.RateLimitKeyExpirationDuration)
 		}
 	}
 }
@@ -69,13 +71,18 @@ func memoryRateLimiter(c *gin.Context, maxRequestNum int, duration int64, mark s
 }
 
 func rateLimitFactory(maxRequestNum int, duration int64, mark string) func(c *gin.Context) {
+	if maxRequestNum == 0 {
+		return func(c *gin.Context) {
+			c.Next()
+		}
+	}
 	if common.RedisEnabled {
 		return func(c *gin.Context) {
 			redisRateLimiter(c, maxRequestNum, duration, mark)
 		}
 	} else {
 		// It's safe to call multi times.
-		inMemoryRateLimiter.Init(common.RateLimitKeyExpirationDuration)
+		inMemoryRateLimiter.Init(config.RateLimitKeyExpirationDuration)
 		return func(c *gin.Context) {
 			memoryRateLimiter(c, maxRequestNum, duration, mark)
 		}
@@ -83,21 +90,21 @@ func rateLimitFactory(maxRequestNum int, duration int64, mark string) func(c *gi
 }
 
 func GlobalWebRateLimit() func(c *gin.Context) {
-	return rateLimitFactory(common.GlobalWebRateLimitNum, common.GlobalWebRateLimitDuration, "GW")
+	return rateLimitFactory(config.GlobalWebRateLimitNum, config.GlobalWebRateLimitDuration, "GW")
 }
 
 func GlobalAPIRateLimit() func(c *gin.Context) {
-	return rateLimitFactory(common.GlobalApiRateLimitNum, common.GlobalApiRateLimitDuration, "GA")
+	return rateLimitFactory(config.GlobalApiRateLimitNum, config.GlobalApiRateLimitDuration, "GA")
 }
 
 func CriticalRateLimit() func(c *gin.Context) {
-	return rateLimitFactory(common.CriticalRateLimitNum, common.CriticalRateLimitDuration, "CT")
+	return rateLimitFactory(config.CriticalRateLimitNum, config.CriticalRateLimitDuration, "CT")
 }
 
 func DownloadRateLimit() func(c *gin.Context) {
-	return rateLimitFactory(common.DownloadRateLimitNum, common.DownloadRateLimitDuration, "DW")
+	return rateLimitFactory(config.DownloadRateLimitNum, config.DownloadRateLimitDuration, "DW")
 }
 
 func UploadRateLimit() func(c *gin.Context) {
-	return rateLimitFactory(common.UploadRateLimitNum, common.UploadRateLimitDuration, "UP")
+	return rateLimitFactory(config.UploadRateLimitNum, config.UploadRateLimitDuration, "UP")
 }

middleware/recover.go

@@ -3,8 +3,9 @@ package middleware
 import (
 	"fmt"
 	"github.com/gin-gonic/gin"
+	"github.com/songquanpeng/one-api/common"
+	"github.com/songquanpeng/one-api/common/logger"
 	"net/http"
-	"one-api/common"
 	"runtime/debug"
 )
 
@@ -12,11 +13,15 @@ func RelayPanicRecover() gin.HandlerFunc {
 	return func(c *gin.Context) {
 		defer func() {
 			if err := recover(); err != nil {
-				common.SysError(fmt.Sprintf("panic detected: %v", err))
-				common.SysError(fmt.Sprintf("stacktrace from panic: %s", string(debug.Stack())))
+				ctx := c.Request.Context()
+				logger.Errorf(ctx, "panic detected: %v", err)
+				logger.Errorf(ctx, "stacktrace from panic: %s", string(debug.Stack()))
+				logger.Errorf(ctx, "request: %s %s", c.Request.Method, c.Request.URL.Path)
+				body, _ := common.GetRequestBody(c)
+				logger.Errorf(ctx, "request body: %s", string(body))
 				c.JSON(http.StatusInternalServerError, gin.H{
 					"error": gin.H{
-						"message": fmt.Sprintf("Panic detected, error: %v. Please submit a issue here: https://github.com/songquanpeng/one-api", err),
+						"message": fmt.Sprintf("Panic detected, error: %v. Please submit an issue with the related log here: https://github.com/songquanpeng/one-api", err),
 						"type":    "one_api_panic",
 					},
 				})

middleware/request-id.go

@@ -2,17 +2,18 @@ package middleware
 
 import (
 	"context"
+
 	"github.com/gin-gonic/gin"
-	"one-api/common"
+	"github.com/songquanpeng/one-api/common/helper"
 )
 
 func RequestId() func(c *gin.Context) {
 	return func(c *gin.Context) {
-		id := common.GetTimeString() + common.GetRandomString(8)
-		c.Set(common.RequestIdKey, id)
-		ctx := context.WithValue(c.Request.Context(), common.RequestIdKey, id)
+		id := helper.GenRequestID()
+		c.Set(helper.RequestIdKey, id)
+		ctx := context.WithValue(c.Request.Context(), helper.RequestIdKey, id)
 		c.Request = c.Request.WithContext(ctx)
-		c.Header(common.RequestIdKey, id)
+		c.Header(helper.RequestIdKey, id)
 		c.Next()
 	}
 }

middleware/turnstile-check.go

@@ -4,9 +4,10 @@ import (
 	"encoding/json"
 	"github.com/gin-contrib/sessions"
 	"github.com/gin-gonic/gin"
+	"github.com/songquanpeng/one-api/common/config"
+	"github.com/songquanpeng/one-api/common/logger"
 	"net/http"
 	"net/url"
-	"one-api/common"
 )
 
 type turnstileCheckResponse struct {
@@ -15,7 +16,7 @@ type turnstileCheckResponse struct {
 
 func TurnstileCheck() gin.HandlerFunc {
 	return func(c *gin.Context) {
-		if common.TurnstileCheckEnabled {
+		if config.TurnstileCheckEnabled {
 			session := sessions.Default(c)
 			turnstileChecked := session.Get("turnstile")
 			if turnstileChecked != nil {
@@ -32,12 +33,12 @@ func TurnstileCheck() gin.HandlerFunc {
 				return
 			}
 			rawRes, err := http.PostForm("https://challenges.cloudflare.com/turnstile/v0/siteverify", url.Values{
-				"secret":   {common.TurnstileSecretKey},
+				"secret":   {config.TurnstileSecretKey},
 				"response": {response},
 				"remoteip": {c.ClientIP()},
 			})
 			if err != nil {
-				common.SysError(err.Error())
+				logger.SysError(err.Error())
 				c.JSON(http.StatusOK, gin.H{
 					"success": false,
 					"message": err.Error(),
@@ -49,7 +50,7 @@ func TurnstileCheck() gin.HandlerFunc {
 			var res turnstileCheckResponse
 			err = json.NewDecoder(rawRes.Body).Decode(&res)
 			if err != nil {
-				common.SysError(err.Error())
+				logger.SysError(err.Error())
 				c.JSON(http.StatusOK, gin.H{
 					"success": false,
 					"message": err.Error(),

middleware/utils.go

@@ -1,17 +1,63 @@
 package middleware
 
 import (
+	"strings"
+
 	"github.com/gin-gonic/gin"
-	"one-api/common"
+	"github.com/pkg/errors"
+	"github.com/songquanpeng/one-api/common"
+	"github.com/songquanpeng/one-api/common/helper"
+	"github.com/songquanpeng/one-api/common/logger"
 )
 
 func abortWithMessage(c *gin.Context, statusCode int, message string) {
 	c.JSON(statusCode, gin.H{
 		"error": gin.H{
-			"message": common.MessageWithRequestId(message, c.GetString(common.RequestIdKey)),
+			"message": helper.MessageWithRequestId(message, c.GetString(helper.RequestIdKey)),
 			"type":    "one_api_error",
 		},
 	})
 	c.Abort()
-	common.LogError(c.Request.Context(), message)
+	logger.Error(c.Request.Context(), message)
+}
+
+func getRequestModel(c *gin.Context) (string, error) {
+	var modelRequest ModelRequest
+	err := common.UnmarshalBodyReusable(c, &modelRequest)
+	if err != nil {
+		return "", errors.Wrap(err, "common.UnmarshalBodyReusable failed")
+	}
+
+	switch {
+	case strings.HasPrefix(c.Request.URL.Path, "/v1/moderations"):
+		if modelRequest.Model == "" {
+			modelRequest.Model = "text-moderation-stable"
+		}
+	case strings.HasSuffix(c.Request.URL.Path, "embeddings"):
+		if modelRequest.Model == "" {
+			modelRequest.Model = c.Param("model")
+		}
+	case strings.HasPrefix(c.Request.URL.Path, "/v1/images/generations"),
+		strings.HasPrefix(c.Request.URL.Path, "/v1/images/edits"):
+		if modelRequest.Model == "" {
+			modelRequest.Model = "dall-e-2"
+		}
+	case strings.HasPrefix(c.Request.URL.Path, "/v1/audio/transcriptions"),
+		strings.HasPrefix(c.Request.URL.Path, "/v1/audio/translations"):
+		if modelRequest.Model == "" {
+			modelRequest.Model = "whisper-1"
+		}
+	}
+
+	return modelRequest.Model, nil
+}
+
+func isModelInList(modelName string, models string) bool {
+	modelList := strings.Split(models, ",")
+	for _, model := range modelList {
+		if modelName == model {
+			return true
+		}
+	}
+	return false
 }