关键服务代码
原创大约 8 分钟
由于服务实现类没有公共的基础类或框架类，每个服务都是单独实现的。
例如，实现DALL·E的服务、实现Midjourney的服务、实现Stable Diffusion的服务、实现支付的服务等都是独立的。
所以，以某一个服务的实现代码举例即可，例如，Midjourney。
Midjourney服务实现的相关代码都在api/service/mj中。
client.go
定义所有需要实现的功能接口和结构体。
type Client interface {
Imagine(task types.MjTask) (ImageRes, error)
Blend(task types.MjTask) (ImageRes, error)
SwapFace(task types.MjTask) (ImageRes, error)
Upscale(task types.MjTask) (ImageRes, error)
Variation(task types.MjTask) (ImageRes, error)
QueryTask(taskId string) (QueryRes, error)
}
type ImageReq struct {
BotType string `json:"botType,omitempty"`
Prompt string `json:"prompt,omitempty"`
Dimensions string `json:"dimensions,omitempty"`
Base64Array []string `json:"base64Array,omitempty"`
AccountFilter interface{} `json:"accountFilter,omitempty"`
NotifyHook string `json:"notifyHook,omitempty"`
State string `json:"state,omitempty"`
}
type ImageRes struct {
Code int `json:"code"`
Description string `json:"description"`
Properties struct {
} `json:"properties"`
Result string `json:"result"`
}
type ErrRes struct {
Error struct {
Message string `json:"message"`
} `json:"error"`
}
type QueryRes struct {
Action string `json:"action"`
Buttons []struct {
CustomId string `json:"customId"`
Emoji string `json:"emoji"`
Label string `json:"label"`
Style int `json:"style"`
Type int `json:"type"`
} `json:"buttons"`
Description string `json:"description"`
FailReason string `json:"failReason"`
FinishTime int `json:"finishTime"`
Id string `json:"id"`
ImageUrl string `json:"imageUrl"`
Progress string `json:"progress"`
Prompt string `json:"prompt"`
PromptEn string `json:"promptEn"`
Properties struct {
} `json:"properties"`
StartTime int `json:"startTime"`
State string `json:"state"`
Status string `json:"status"`
SubmitTime int `json:"submitTime"`
}plus_client.go
实现对MidJourney Plus Proxy的调用。
// PlusClient MidJourney Plus ProxyClient
type PlusClient struct {
Config types.MjPlusConfig
apiURL string
client *req.Client
}
func NewPlusClient(config types.MjPlusConfig) *PlusClient {
return &PlusClient{
Config: config,
apiURL: config.ApiURL,
client: req.C().SetTimeout(time.Minute).SetUserAgent("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36"),
}
}
func (c *PlusClient) Imagine(task types.MjTask) (ImageRes, error) {
apiURL := fmt.Sprintf("%s/mj-%s/mj/submit/imagine", c.apiURL, c.Config.Mode)
prompt := fmt.Sprintf("%s %s", task.Prompt, task.Params)
if task.NegPrompt != "" {
prompt += fmt.Sprintf(" --no %s", task.NegPrompt)
}
body := ImageReq{
BotType: "MID_JOURNEY",
Prompt: prompt,
Base64Array: make([]string, 0),
}
// 生成图片 Base64 编码
if len(task.ImgArr) > 0 {
imageData, err := utils.DownloadImage(task.ImgArr[0], "")
if err != nil {
logger.Error("error with download image: ", err)
} else {
body.Base64Array = append(body.Base64Array, "data:image/png;base64,"+base64.StdEncoding.EncodeToString(imageData))
}
}
logger.Info("API URL: ", apiURL)
var res ImageRes
var errRes ErrRes
r, err := c.client.R().
SetHeader("Authorization", "Bearer "+c.Config.ApiKey).
SetBody(body).
SetSuccessResult(&res).
SetErrorResult(&errRes).
Post(apiURL)
if err != nil {
return ImageRes{}, fmt.Errorf("请求 API %s 出错：%v", apiURL, err)
}
if r.IsErrorState() {
errStr, _ := io.ReadAll(r.Body)
return ImageRes{}, fmt.Errorf("API 返回错误：%s，%v", errRes.Error.Message, string(errStr))
}
return res, nil
}
// Blend 融图
func (c *PlusClient) Blend(task types.MjTask) (ImageRes, error) {
apiURL := fmt.Sprintf("%s/mj-%s/mj/submit/blend", c.apiURL, c.Config.Mode)
logger.Info("API URL: ", apiURL)
body := ImageReq{
BotType: "MID_JOURNEY",
Dimensions: "SQUARE",
Base64Array: make([]string, 0),
}
// 生成图片 Base64 编码
if len(task.ImgArr) > 0 {
for _, imgURL := range task.ImgArr {
imageData, err := utils.DownloadImage(imgURL, "")
if err != nil {
logger.Error("error with download image: ", err)
} else {
body.Base64Array = append(body.Base64Array, "data:image/png;base64,"+base64.StdEncoding.EncodeToString(imageData))
}
}
}
var res ImageRes
var errRes ErrRes
r, err := c.client.R().
SetHeader("Authorization", "Bearer "+c.Config.ApiKey).
SetBody(body).
SetSuccessResult(&res).
SetErrorResult(&errRes).
Post(apiURL)
if err != nil {
return ImageRes{}, fmt.Errorf("请求 API %s 出错：%v", apiURL, err)
}
if r.IsErrorState() {
return ImageRes{}, fmt.Errorf("API 返回错误：%s", errRes.Error.Message)
}
return res, nil
}
// SwapFace 换脸
func (c *PlusClient) SwapFace(task types.MjTask) (ImageRes, error) {
apiURL := fmt.Sprintf("%s/mj-%s/mj/insight-face/swap", c.apiURL, c.Config.Mode)
// 生成图片 Base64 编码
if len(task.ImgArr) != 2 {
return ImageRes{}, errors.New("参数错误，必须上传2张图片")
}
var sourceBase64 string
var targetBase64 string
imageData, err := utils.DownloadImage(task.ImgArr[0], "")
if err != nil {
logger.Error("error with download image: ", err)
} else {
sourceBase64 = "data:image/png;base64," + base64.StdEncoding.EncodeToString(imageData)
}
imageData, err = utils.DownloadImage(task.ImgArr[1], "")
if err != nil {
logger.Error("error with download image: ", err)
} else {
targetBase64 = "data:image/png;base64," + base64.StdEncoding.EncodeToString(imageData)
}
body := gin.H{
"sourceBase64": sourceBase64,
"targetBase64": targetBase64,
"accountFilter": gin.H{
"instanceId": "",
},
"state": "",
}
var res ImageRes
var errRes ErrRes
r, err := c.client.SetTimeout(time.Minute).R().
SetHeader("Authorization", "Bearer "+c.Config.ApiKey).
SetBody(body).
SetSuccessResult(&res).
SetErrorResult(&errRes).
Post(apiURL)
if err != nil {
return ImageRes{}, fmt.Errorf("请求 API %s 出错：%v", apiURL, err)
}
if r.IsErrorState() {
return ImageRes{}, fmt.Errorf("API 返回错误：%s", errRes.Error.Message)
}
return res, nil
}
// Upscale 放大指定的图片
func (c *PlusClient) Upscale(task types.MjTask) (ImageRes, error) {
body := map[string]string{
"customId": fmt.Sprintf("MJ::JOB::upsample::%d::%s", task.Index, task.MessageHash),
"taskId": task.MessageId,
}
apiURL := fmt.Sprintf("%s/mj-%s/mj/submit/action", c.apiURL, c.Config.Mode)
logger.Info("API URL: ", apiURL)
var res ImageRes
var errRes ErrRes
r, err := c.client.R().
SetHeader("Authorization", "Bearer "+c.Config.ApiKey).
SetBody(body).
SetSuccessResult(&res).
SetErrorResult(&errRes).
Post(apiURL)
if err != nil {
return ImageRes{}, fmt.Errorf("请求 API 出错：%v", err)
}
if r.IsErrorState() {
return ImageRes{}, fmt.Errorf("API 返回错误：%s", errRes.Error.Message)
}
return res, nil
}
// Variation 以指定的图片的视角进行变换再创作，注意需要在对应的频道中关闭 Remix 变换，否则 Variation 指令将不会生效
func (c *PlusClient) Variation(task types.MjTask) (ImageRes, error) {
body := map[string]string{
"customId": fmt.Sprintf("MJ::JOB::variation::%d::%s", task.Index, task.MessageHash),
"taskId": task.MessageId,
}
apiURL := fmt.Sprintf("%s/mj-%s/mj/submit/action", c.apiURL, c.Config.Mode)
logger.Info("API URL: ", apiURL)
var res ImageRes
var errRes ErrRes
r, err := req.C().R().
SetHeader("Authorization", "Bearer "+c.Config.ApiKey).
SetBody(body).
SetSuccessResult(&res).
SetErrorResult(&errRes).
Post(apiURL)
if err != nil {
return ImageRes{}, fmt.Errorf("请求 API 出错：%v", err)
}
if r.IsErrorState() {
return ImageRes{}, fmt.Errorf("API 返回错误：%s", errRes.Error.Message)
}
return res, nil
}
func (c *PlusClient) QueryTask(taskId string) (QueryRes, error) {
apiURL := fmt.Sprintf("%s/mj/task/%s/fetch", c.apiURL, taskId)
var res QueryRes
r, err := c.client.R().SetHeader("Authorization", "Bearer "+c.Config.ApiKey).
SetSuccessResult(&res).
Get(apiURL)
if err != nil {
return QueryRes{}, err
}
if r.IsErrorState() {
return QueryRes{}, errors.New("error status:" + r.Status)
}
return res, nil
}
var _ Client = &PlusClient{}proxy_client.go
实现对Midjourney Proxy的调用。
它和前面plus_client.go中的代码大部分一致，不同只是调用的路径和一些细节，其实可以再做一层抽象。
// ProxyClient MidJourney Proxy Client
type ProxyClient struct {
Config types.MjProxyConfig
apiURL string
}
func NewProxyClient(config types.MjProxyConfig) *ProxyClient {
return &ProxyClient{Config: config, apiURL: config.ApiURL}
}
func (c *ProxyClient) Imagine(task types.MjTask) (ImageRes, error) {
apiURL := fmt.Sprintf("%s/mj/submit/imagine", c.apiURL)
prompt := fmt.Sprintf("%s %s", task.Prompt, task.Params)
if task.NegPrompt != "" {
prompt += fmt.Sprintf(" --no %s", task.NegPrompt)
}
body := ImageReq{
Prompt: prompt,
Base64Array: make([]string, 0),
}
// 生成图片 Base64 编码
if len(task.ImgArr) > 0 {
imageData, err := utils.DownloadImage(task.ImgArr[0], "")
if err != nil {
logger.Error("error with download image: ", err)
} else {
body.Base64Array = append(body.Base64Array, "data:image/png;base64,"+base64.StdEncoding.EncodeToString(imageData))
}
}
logger.Info("API URL: ", apiURL)
var res ImageRes
var errRes ErrRes
r, err := req.C().R().
SetHeader("mj-api-secret", c.Config.ApiKey).
SetBody(body).
SetSuccessResult(&res).
SetErrorResult(&errRes).
Post(apiURL)
if err != nil {
return ImageRes{}, fmt.Errorf("请求 API %s 出错：%v", apiURL, err)
}
if r.IsErrorState() {
errStr, _ := io.ReadAll(r.Body)
return ImageRes{}, fmt.Errorf("API 返回错误：%s，%v", errRes.Error.Message, string(errStr))
}
return res, nil
}
// Blend 融图
func (c *ProxyClient) Blend(task types.MjTask) (ImageRes, error) {
apiURL := fmt.Sprintf("%s/mj/submit/blend", c.apiURL)
body := ImageReq{
Dimensions: "SQUARE",
Base64Array: make([]string, 0),
}
// 生成图片 Base64 编码
if len(task.ImgArr) > 0 {
for _, imgURL := range task.ImgArr {
imageData, err := utils.DownloadImage(imgURL, "")
if err != nil {
logger.Error("error with download image: ", err)
} else {
body.Base64Array = append(body.Base64Array, "data:image/png;base64,"+base64.StdEncoding.EncodeToString(imageData))
}
}
}
var res ImageRes
var errRes ErrRes
r, err := req.C().R().
SetHeader("mj-api-secret", c.Config.ApiKey).
SetBody(body).
SetSuccessResult(&res).
SetErrorResult(&errRes).
Post(apiURL)
if err != nil {
return ImageRes{}, fmt.Errorf("请求 API %s 出错：%v", apiURL, err)
}
if r.IsErrorState() {
return ImageRes{}, fmt.Errorf("API 返回错误：%s", errRes.Error.Message)
}
return res, nil
}
// SwapFace 换脸
func (c *ProxyClient) SwapFace(_ types.MjTask) (ImageRes, error) {
return ImageRes{}, errors.New("MidJourney-Proxy暂未实现该功能，请使用 MidJourney-Plus")
}
// Upscale 放大指定的图片
func (c *ProxyClient) Upscale(task types.MjTask) (ImageRes, error) {
body := map[string]interface{}{
"action": "UPSCALE",
"index": task.Index,
"taskId": task.MessageId,
}
apiURL := fmt.Sprintf("%s/mj/submit/change", c.apiURL)
var res ImageRes
var errRes ErrRes
r, err := req.C().R().
SetHeader("mj-api-secret", c.Config.ApiKey).
SetBody(body).
SetSuccessResult(&res).
SetErrorResult(&errRes).
Post(apiURL)
if err != nil {
return ImageRes{}, fmt.Errorf("请求 API 出错：%v", err)
}
if r.IsErrorState() {
return ImageRes{}, fmt.Errorf("API 返回错误：%s", errRes.Error.Message)
}
return res, nil
}
// Variation 以指定的图片的视角进行变换再创作，注意需要在对应的频道中关闭 Remix 变换，否则 Variation 指令将不会生效
func (c *ProxyClient) Variation(task types.MjTask) (ImageRes, error) {
body := map[string]interface{}{
"action": "VARIATION",
"index": task.Index,
"taskId": task.MessageId,
}
apiURL := fmt.Sprintf("%s/mj/submit/change", c.apiURL)
var res ImageRes
var errRes ErrRes
r, err := req.C().R().
SetHeader("mj-api-secret", c.Config.ApiKey).
SetBody(body).
SetSuccessResult(&res).
SetErrorResult(&errRes).
Post(apiURL)
if err != nil {
return ImageRes{}, fmt.Errorf("请求 API 出错：%v", err)
}
if r.IsErrorState() {
return ImageRes{}, fmt.Errorf("API 返回错误：%s", errRes.Error.Message)
}
return res, nil
}
func (c *ProxyClient) QueryTask(taskId string) (QueryRes, error) {
apiURL := fmt.Sprintf("%s/mj/task/%s/fetch", c.apiURL, taskId)
var res QueryRes
r, err := req.C().R().SetHeader("mj-api-secret", c.Config.ApiKey).
SetSuccessResult(&res).
Get(apiURL)
if err != nil {
return QueryRes{}, err
}
if r.IsErrorState() {
return QueryRes{}, errors.New("error status:" + r.Status)
}
return res, nil
}
var _ Client = &ProxyClient{}service.go
绘画服务管理，例如，运行、停止、生成结果通知等。
另外还有一个pool.go，起到类似于服务线程池的作用。
// Service MJ 绘画服务
type Service struct {
Name string // service Name
Client Client // MJ Client
taskQueue *store.RedisQueue
notifyQueue *store.RedisQueue
db *gorm.DB
running bool
}
func NewService(name string, taskQueue *store.RedisQueue, notifyQueue *store.RedisQueue, db *gorm.DB, cli Client) *Service {
return &Service{
Name: name,
db: db,
taskQueue: taskQueue,
notifyQueue: notifyQueue,
Client: cli,
running: true,
}
}
func (s *Service) Run() {
logger.Infof("Starting MidJourney job consumer for %s", s.Name)
for s.running {
var task types.MjTask
err := s.taskQueue.LPop(&task)
if err != nil {
logger.Errorf("taking task with error: %v", err)
continue
}
// 如果配置了多个中转平台的 API KEY
// U,V 操作必须和 Image 操作属于同一个平台，否则找不到关联任务，需重新放回任务列表
if task.ChannelId != "" && task.ChannelId != s.Name {
logger.Debugf("handle other service task, name: %s, channel_id: %s, drop it.", s.Name, task.ChannelId)
s.taskQueue.RPush(task)
time.Sleep(time.Second)
continue
}
// translate prompt
if utils.HasChinese(task.Prompt) {
content, err := utils.OpenAIRequest(s.db, fmt.Sprintf(service.RewritePromptTemplate, task.Prompt))
if err == nil {
task.Prompt = content
} else {
logger.Warnf("error with translate prompt: %v", err)
}
}
// translate negative prompt
if task.NegPrompt != "" && utils.HasChinese(task.NegPrompt) {
content, err := utils.OpenAIRequest(s.db, fmt.Sprintf(service.RewritePromptTemplate, task.NegPrompt))
if err == nil {
task.NegPrompt = content
} else {
logger.Warnf("error with translate prompt: %v", err)
}
}
var job model.MidJourneyJob
tx := s.db.Where("id = ?", task.Id).First(&job)
if tx.Error != nil {
logger.Error("任务不存在，任务ID：", task.TaskId)
continue
}
logger.Infof("%s handle a new MidJourney task: %+v", s.Name, task)
var res ImageRes
switch task.Type {
case types.TaskImage:
res, err = s.Client.Imagine(task)
break
case types.TaskUpscale:
res, err = s.Client.Upscale(task)
break
case types.TaskVariation:
res, err = s.Client.Variation(task)
break
case types.TaskBlend:
res, err = s.Client.Blend(task)
break
case types.TaskSwapFace:
res, err = s.Client.SwapFace(task)
break
}
if err != nil || (res.Code != 1 && res.Code != 22) {
errMsg := fmt.Sprintf("%v,%s", err, res.Description)
logger.Error("绘画任务执行失败：", errMsg)
job.Progress = -1
job.ErrMsg = errMsg
// update the task progress
s.db.Updates(&job)
// 任务失败，通知前端
s.notifyQueue.RPush(sd.NotifyMessage{UserId: task.UserId, JobId: int(job.Id), Message: sd.Failed})
continue
}
logger.Infof("任务提交成功：%+v", res)
// 更新任务 ID/频道
job.TaskId = res.Result
job.MessageId = res.Result
job.ChannelId = s.Name
s.db.Updates(&job)
}
}
func (s *Service) Stop() {
s.running = false
}
type CBReq struct {
Id string `json:"id"`
Action string `json:"action"`
Status string `json:"status"`
Prompt string `json:"prompt"`
PromptEn string `json:"promptEn"`
Description string `json:"description"`
SubmitTime int64 `json:"submitTime"`
StartTime int64 `json:"startTime"`
FinishTime int64 `json:"finishTime"`
Progress string `json:"progress"`
ImageUrl string `json:"imageUrl"`
FailReason interface{} `json:"failReason"`
Properties struct {
FinalPrompt string `json:"finalPrompt"`
} `json:"properties"`
}
func (s *Service) Notify(job model.MidJourneyJob) error {
task, err := s.Client.QueryTask(job.TaskId)
if err != nil {
return err
}
// 任务执行失败了
if task.FailReason != "" {
s.db.Model(&model.MidJourneyJob{Id: job.Id}).UpdateColumns(map[string]interface{}{
"progress": -1,
"err_msg": task.FailReason,
})
s.notifyQueue.RPush(sd.NotifyMessage{UserId: job.UserId, JobId: int(job.Id), Message: sd.Failed})
return fmt.Errorf("task failed: %v", task.FailReason)
}
if len(task.Buttons) > 0 {
job.Hash = GetImageHash(task.Buttons[0].CustomId)
}
oldProgress := job.Progress
job.Progress = utils.IntValue(strings.Replace(task.Progress, "%", "", 1), 0)
job.Prompt = task.PromptEn
if task.ImageUrl != "" {
job.OrgURL = task.ImageUrl
}
tx := s.db.Updates(&job)
if tx.Error != nil {
return fmt.Errorf("error with update database: %v", tx.Error)
}
// 通知前端更新任务进度
if oldProgress != job.Progress {
message := sd.Running
if job.Progress == 100 {
message = sd.Finished
}
s.notifyQueue.RPush(sd.NotifyMessage{UserId: job.UserId, JobId: int(job.Id), Message: message})
}
return nil
}
func GetImageHash(action string) string {
split := strings.Split(action, "::")
if len(split) > 5 {
return split[4]
}
return split[len(split)-1]
}感谢支持
更多内容，请移步《超级个体》。