feat: initial support of Dall-E (#148, #266)

* feat: initial support of Dall-E

* fix: fix N not timed

---------

Co-authored-by: JustSong <songquanpeng@foxmail.com>
Co-authored-by: JustSong <39998050+songquanpeng@users.noreply.github.com>

README.md

@@ -81,16 +81,17 @@ _✨ All in one 的 OpenAI 接口，整合各种 API 访问方式，开箱即用
 12. 支持以美元为单位显示额度。
 13. 支持发布公告，设置充值链接，设置新用户初始额度。
 14. 支持模型映射，重定向用户的请求模型。
-15. 支持丰富的**自定义**设置，
+15. 支持绘图接口。
+16. 支持丰富的**自定义**设置，
     1. 支持自定义系统名称，logo 以及页脚。
     2. 支持自定义首页和关于页面，可以选择使用 HTML & Markdown 代码进行自定义，或者使用一个单独的网页通过 iframe 嵌入。
-16. 支持通过系统访问令牌访问管理 API。
+17. 支持通过系统访问令牌访问管理 API。
-17. 支持 Cloudflare Turnstile 用户校验。
+18. 支持 Cloudflare Turnstile 用户校验。
-18. 支持用户管理，支持**多种用户登录注册方式**：
+19. 支持用户管理，支持**多种用户登录注册方式**：
     + 邮箱登录注册以及通过邮箱进行密码重置。
     + [GitHub 开放授权](https://github.com/settings/applications/new)。
     + 微信公众号授权（需要额外部署 [WeChat Server](https://github.com/songquanpeng/wechat-server)）。
-19. 未来其他大模型开放 API 后，将第一时间支持，并将其封装成同样的 API 访问方式。
+20. 未来其他大模型开放 API 后，将第一时间支持，并将其封装成同样的 API 访问方式。
 
 ## 部署
 ### 基于 Docker 进行部署

common/model-ratio.go

@@ -35,6 +35,7 @@ var ModelRatio = map[string]float64{
 	"text-search-ada-doc-001": 10,
 	"text-moderation-stable":  0.1,
 	"text-moderation-latest":  0.1,
+	"dall-e":                  8,
 }
 
 func ModelRatio2JSONString() string {

controller/model.go

@@ -2,6 +2,7 @@ package controller
 
 import (
 	"fmt"
+
 	"github.com/gin-gonic/gin"
 )
 
@@ -53,6 +54,15 @@ func init() {
 	})
 	// https://platform.openai.com/docs/models/model-endpoint-compatibility
 	openAIModels = []OpenAIModels{
+		{
+			Id:         "dall-e",
+			Object:     "model",
+			Created:    1677649963,
+			OwnedBy:    "openai",
+			Permission: permission,
+			Root:       "dall-e",
+			Parent:     nil,
+		},
 		{
 			Id:         "gpt-3.5-turbo",
 			Object:     "model",

controller/relay-image.go

@@ -1,34 +1,181 @@
 package controller
 
 import (
-	"github.com/gin-gonic/gin"
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
 	"io"
 	"net/http"
+	"one-api/common"
+	"one-api/model"
+
+	"github.com/gin-gonic/gin"
 )
 
 func relayImageHelper(c *gin.Context, relayMode int) *OpenAIErrorWithStatusCode {
-	// TODO: this part is not finished
+	imageModel := "dall-e"
-	req, err := http.NewRequest(c.Request.Method, c.Request.RequestURI, c.Request.Body)
+
+	tokenId := c.GetInt("token_id")
+	channelType := c.GetInt("channel")
+	userId := c.GetInt("id")
+	consumeQuota := c.GetBool("consume_quota")
+	group := c.GetString("group")
+
+	var imageRequest ImageRequest
+	if consumeQuota {
+		err := common.UnmarshalBodyReusable(c, &imageRequest)
+		if err != nil {
+			return errorWrapper(err, "bind_request_body_failed", http.StatusBadRequest)
+		}
+	}
+
+	// Prompt validation
+	if imageRequest.Prompt == "" {
+		return errorWrapper(errors.New("prompt is required"), "required_field_missing", http.StatusBadRequest)
+	}
+
+	// Not "256x256", "512x512", or "1024x1024"
+	if imageRequest.Size != "" && imageRequest.Size != "256x256" && imageRequest.Size != "512x512" && imageRequest.Size != "1024x1024" {
+		return errorWrapper(errors.New("size must be one of 256x256, 512x512, or 1024x1024"), "invalid_field_value", http.StatusBadRequest)
+	}
+
+	// N should between 1 and 10
+	if imageRequest.N != 0 && (imageRequest.N < 1 || imageRequest.N > 10) {
+		return errorWrapper(errors.New("n must be between 1 and 10"), "invalid_field_value", http.StatusBadRequest)
+	}
+
+	// map model name
+	modelMapping := c.GetString("model_mapping")
+	isModelMapped := false
+	if modelMapping != "" {
+		modelMap := make(map[string]string)
+		err := json.Unmarshal([]byte(modelMapping), &modelMap)
+		if err != nil {
+			return errorWrapper(err, "unmarshal_model_mapping_failed", http.StatusInternalServerError)
+		}
+		if modelMap[imageModel] != "" {
+			imageModel = modelMap[imageModel]
+			isModelMapped = true
+		}
+	}
+
+	baseURL := common.ChannelBaseURLs[channelType]
+	requestURL := c.Request.URL.String()
+
+	if c.GetString("base_url") != "" {
+		baseURL = c.GetString("base_url")
+	}
+
+	fullRequestURL := fmt.Sprintf("%s%s", baseURL, requestURL)
+
+	var requestBody io.Reader
+	if isModelMapped {
+		jsonStr, err := json.Marshal(imageRequest)
+		if err != nil {
+			return errorWrapper(err, "marshal_text_request_failed", http.StatusInternalServerError)
+		}
+		requestBody = bytes.NewBuffer(jsonStr)
+	} else {
+		requestBody = c.Request.Body
+	}
+
+	modelRatio := common.GetModelRatio(imageModel)
+	groupRatio := common.GetGroupRatio(group)
+	ratio := modelRatio * groupRatio
+	userQuota, err := model.CacheGetUserQuota(userId)
+
+	sizeRatio := 1.0
+	// Size
+	if imageRequest.Size == "256x256" {
+		sizeRatio = 1
+	} else if imageRequest.Size == "512x512" {
+		sizeRatio = 1.125
+	} else if imageRequest.Size == "1024x1024" {
+		sizeRatio = 1.25
+	}
+	quota := int(ratio*sizeRatio*1000) * imageRequest.N
+
+	if consumeQuota && userQuota-quota < 0 {
+		return errorWrapper(err, "insufficient_user_quota", http.StatusForbidden)
+	}
+
+	req, err := http.NewRequest(c.Request.Method, fullRequestURL, requestBody)
+	if err != nil {
+		return errorWrapper(err, "new_request_failed", http.StatusInternalServerError)
+	}
+	req.Header.Set("Authorization", c.Request.Header.Get("Authorization"))
+
+	req.Header.Set("Content-Type", c.Request.Header.Get("Content-Type"))
+	req.Header.Set("Accept", c.Request.Header.Get("Accept"))
+
 	client := &http.Client{}
 	resp, err := client.Do(req)
 	if err != nil {
-		return errorWrapper(err, "do_request_failed", http.StatusOK)
+		return errorWrapper(err, "do_request_failed", http.StatusInternalServerError)
 	}
+
 	err = req.Body.Close()
 	if err != nil {
-		return errorWrapper(err, "close_request_body_failed", http.StatusOK)
+		return errorWrapper(err, "close_request_body_failed", http.StatusInternalServerError)
 	}
+	err = c.Request.Body.Close()
+	if err != nil {
+		return errorWrapper(err, "close_request_body_failed", http.StatusInternalServerError)
+	}
+	var textResponse ImageResponse
+
+	defer func() {
+		if consumeQuota {
+			err := model.PostConsumeTokenQuota(tokenId, quota)
+			if err != nil {
+				common.SysError("error consuming token remain quota: " + err.Error())
+			}
+			err = model.CacheUpdateUserQuota(userId)
+			if err != nil {
+				common.SysError("error update user quota cache: " + err.Error())
+			}
+			if quota != 0 {
+				tokenName := c.GetString("token_name")
+				logContent := fmt.Sprintf("模型倍率 %.2f，分组倍率 %.2f", modelRatio, groupRatio)
+				model.RecordConsumeLog(userId, 0, 0, imageModel, tokenName, quota, logContent)
+				model.UpdateUserUsedQuotaAndRequestCount(userId, quota)
+				channelId := c.GetInt("channel_id")
+				model.UpdateChannelUsedQuota(channelId, quota)
+			}
+		}
+	}()
+
+	if consumeQuota {
+		responseBody, err := io.ReadAll(resp.Body)
+
+		if err != nil {
+			return errorWrapper(err, "read_response_body_failed", http.StatusInternalServerError)
+		}
+		err = resp.Body.Close()
+		if err != nil {
+			return errorWrapper(err, "close_response_body_failed", http.StatusInternalServerError)
+		}
+		err = json.Unmarshal(responseBody, &textResponse)
+		if err != nil {
+			return errorWrapper(err, "unmarshal_response_body_failed", http.StatusInternalServerError)
+		}
+
+		resp.Body = io.NopCloser(bytes.NewBuffer(responseBody))
+	}
+
 	for k, v := range resp.Header {
 		c.Writer.Header().Set(k, v[0])
 	}
 	c.Writer.WriteHeader(resp.StatusCode)
+
 	_, err = io.Copy(c.Writer, resp.Body)
 	if err != nil {
-		return errorWrapper(err, "copy_response_body_failed", http.StatusOK)
+		return errorWrapper(err, "copy_response_body_failed", http.StatusInternalServerError)
 	}
 	err = resp.Body.Close()
 	if err != nil {
-		return errorWrapper(err, "close_response_body_failed", http.StatusOK)
+		return errorWrapper(err, "close_response_body_failed", http.StatusInternalServerError)
 	}
 	return nil
 }

controller/relay.go

@@ -38,6 +38,7 @@ type GeneralOpenAIRequest struct {
 	N           int       `json:"n,omitempty"`
 	Input       any       `json:"input,omitempty"`
 	Instruction string    `json:"instruction,omitempty"`
+	Size        string    `json:"size,omitempty"`
 }
 
 type ChatRequest struct {
@@ -54,6 +55,12 @@ type TextRequest struct {
 	//Stream   bool      `json:"stream"`
 }
 
+type ImageRequest struct {
+	Prompt string `json:"prompt"`
+	N      int    `json:"n"`
+	Size   string `json:"size"`
+}
+
 type Usage struct {
 	PromptTokens     int `json:"prompt_tokens"`
 	CompletionTokens int `json:"completion_tokens"`
@@ -77,6 +84,13 @@ type TextResponse struct {
 	Error OpenAIError `json:"error"`
 }
 
+type ImageResponse struct {
+	Created int `json:"created"`
+	Data    []struct {
+		Url string `json:"url"`
+	}
+}
+
 type ChatCompletionsStreamResponse struct {
 	Choices []struct {
 		Delta struct {

middleware/distributor.go

@@ -79,6 +79,11 @@ func Distribute() func(c *gin.Context) {
 					modelRequest.Model = c.Param("model")
 				}
 			}
+			if strings.HasPrefix(c.Request.URL.Path, "/v1/images/generations") {
+				if modelRequest.Model == "" {
+					modelRequest.Model = "dall-e"
+				}
+			}
 			channel, err = model.CacheGetRandomSatisfiedChannel(userGroup, modelRequest.Model)
 			if err != nil {
 				message := "无可用渠道"

router/relay-router.go

@@ -21,7 +21,7 @@ func SetRelayRouter(router *gin.Engine) {
 		relayV1Router.POST("/completions", controller.Relay)
 		relayV1Router.POST("/chat/completions", controller.Relay)
 		relayV1Router.POST("/edits", controller.Relay)
-		relayV1Router.POST("/images/generations", controller.RelayNotImplemented)
+		relayV1Router.POST("/images/generations", controller.Relay)
 		relayV1Router.POST("/images/edits", controller.RelayNotImplemented)
 		relayV1Router.POST("/images/variations", controller.RelayNotImplemented)
 		relayV1Router.POST("/embeddings", controller.Relay)