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feat: 支持上传图片到钉钉平台，在图片生成流程中使用钉钉的图片 CDN 能力 (#225)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,213 @@ | ||
| package dingbot | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/json" | ||
| "errors" | ||
| "fmt" | ||
| "github.com/eryajf/chatgpt-dingtalk/config" | ||
| "io" | ||
| "mime/multipart" | ||
| "net/http" | ||
| url2 "net/url" | ||
| "sync" | ||
| "time" | ||
| ) | ||
|
|
||
| // OpenAPI doc: https://open.dingtalk.com/document/isvapp/upload-media-files | ||
| const ( | ||
| MediaTypeImage string = "image" | ||
| MediaTypeVoice string = "voice" | ||
| MediaTypeVideo string = "video" | ||
| MediaTypeFile string = "file" | ||
| ) | ||
| const ( | ||
| MimeTypeImagePng string = "image/png" | ||
| ) | ||
|
|
||
| type MediaUploadResult struct { | ||
| ErrorCode int64 `json:"errcode"` | ||
| ErrorMessage string `json:"errmsg"` | ||
| MediaID string `json:"media_id"` | ||
| CreatedAt int64 `json:"created_at"` | ||
| Type string `json:"type"` | ||
| } | ||
|
|
||
| type OAuthTokenResult struct { | ||
| ErrorCode int `json:"errcode"` | ||
| ErrorMessage string `json:"errmsg"` | ||
| AccessToken string `json:"access_token"` | ||
| ExpiresIn int `json:"expires_in"` | ||
| } | ||
|
|
||
| type DingTalkClientInterface interface { | ||
| GetAccessToken() (string, error) | ||
| UploadMedia(content []byte, filename, mediaType, mimeType string) (*MediaUploadResult, error) | ||
| } | ||
|
|
||
| type DingTalkClientManagerInterface interface { | ||
| GetClientByOAuthClientID(clientId string) DingTalkClientInterface | ||
| } | ||
|
|
||
| type DingTalkClient struct { | ||
| Credential config.Credential | ||
| AccessToken string | ||
| expireAt int64 | ||
| mutex sync.Mutex | ||
| } | ||
|
|
||
| type DingTalkClientManager struct { | ||
| Credentials []config.Credential | ||
| Clients map[string]*DingTalkClient | ||
| mutex sync.Mutex | ||
| } | ||
|
|
||
| func NewDingTalkClient(credential config.Credential) *DingTalkClient { | ||
| return &DingTalkClient{ | ||
| Credential: credential, | ||
| } | ||
| } | ||
|
|
||
| func NewDingTalkClientManager(conf *config.Configuration) *DingTalkClientManager { | ||
| clients := make(map[string]*DingTalkClient) | ||
|
|
||
| if conf != nil && conf.Credentials != nil { | ||
| for _, credential := range conf.Credentials { | ||
| clients[credential.ClientID] = NewDingTalkClient(credential) | ||
| } | ||
| } | ||
| return &DingTalkClientManager{ | ||
| Credentials: conf.Credentials, | ||
| Clients: clients, | ||
| } | ||
| } | ||
|
|
||
| func (m *DingTalkClientManager) GetClientByOAuthClientID(clientId string) DingTalkClientInterface { | ||
| m.mutex.Lock() | ||
| defer m.mutex.Unlock() | ||
| if client, ok := m.Clients[clientId]; ok { | ||
| return client | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (c *DingTalkClient) GetAccessToken() (string, error) { | ||
| accessToken := "" | ||
| { | ||
| // 先查询缓存 | ||
| c.mutex.Lock() | ||
| now := time.Now().Unix() | ||
| if c.expireAt > 0 && c.AccessToken != "" && (now+60) < c.expireAt { | ||
| // 预留一分钟有效期避免在Token过期的临界点调用接口出现401错误 | ||
| accessToken = c.AccessToken | ||
| } | ||
| c.mutex.Unlock() | ||
| } | ||
| if accessToken != "" { | ||
| return accessToken, nil | ||
| } | ||
|
|
||
| tokenResult, err := c.getAccessTokenFromDingTalk() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| { | ||
| // 更新缓存 | ||
| c.mutex.Lock() | ||
| c.AccessToken = tokenResult.AccessToken | ||
| c.expireAt = time.Now().Unix() + int64(tokenResult.ExpiresIn) | ||
| c.mutex.Unlock() | ||
| } | ||
| return tokenResult.AccessToken, nil | ||
| } | ||
|
|
||
| func (c *DingTalkClient) UploadMedia(content []byte, filename, mediaType, mimeType string) (*MediaUploadResult, error) { | ||
| // OpenAPI doc: https://open.dingtalk.com/document/isvapp/upload-media-files | ||
| accessToken, err := c.GetAccessToken() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if len(accessToken) == 0 { | ||
| return nil, errors.New("empty access token") | ||
| } | ||
| body := &bytes.Buffer{} | ||
| writer := multipart.NewWriter(body) | ||
| part, err := writer.CreateFormFile("media", filename) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| _, err = part.Write(content) | ||
| writer.WriteField("type", mediaType) | ||
| err = writer.Close() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // Create a new HTTP request to upload the media file | ||
| url := fmt.Sprintf("https://oapi.dingtalk.com/media/upload?access_token=%s", url2.QueryEscape(accessToken)) | ||
| req, err := http.NewRequest("POST", url, body) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| req.Header.Set("Content-Type", writer.FormDataContentType()) | ||
|
|
||
| // Send the HTTP request and parse the response | ||
| client := &http.Client{ | ||
| Timeout: time.Second * 60, | ||
| } | ||
| res, err := client.Do(req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer res.Body.Close() | ||
|
|
||
| // Parse the response body as JSON and extract the media ID | ||
| media := &MediaUploadResult{} | ||
| bodyBytes, err := io.ReadAll(res.Body) | ||
| json.Unmarshal(bodyBytes, media) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if media.ErrorCode != 0 { | ||
| return nil, errors.New(media.ErrorMessage) | ||
| } | ||
| return media, nil | ||
| } | ||
|
|
||
| func (c *DingTalkClient) getAccessTokenFromDingTalk() (*OAuthTokenResult, error) { | ||
| // OpenAPI doc: https://open.dingtalk.com/document/orgapp/obtain-orgapp-token | ||
| apiUrl := "https://oapi.dingtalk.com/gettoken" | ||
| queryParams := url2.Values{} | ||
| queryParams.Add("appkey", c.Credential.ClientID) | ||
| queryParams.Add("appsecret", c.Credential.ClientSecret) | ||
|
|
||
| // Create a new HTTP request to get the AccessToken | ||
| req, err := http.NewRequest("GET", apiUrl+"?"+queryParams.Encode(), nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // Send the HTTP request and parse the response body as JSON | ||
| client := http.Client{ | ||
| Timeout: time.Second * 60, | ||
| } | ||
| res, err := client.Do(req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer res.Body.Close() | ||
| body, err := io.ReadAll(res.Body) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| tokenResult := &OAuthTokenResult{} | ||
| err = json.Unmarshal(body, tokenResult) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if tokenResult.ErrorCode != 0 { | ||
| return nil, errors.New(tokenResult.ErrorMessage) | ||
| } | ||
| return tokenResult, nil | ||
| } |
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