187 lines
5.1 KiB
Go
187 lines
5.1 KiB
Go
package telegram
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import (
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"bytes"
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"errors"
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"io"
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"mime/multipart"
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"os"
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"path"
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http "github.com/valyala/fasthttp"
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)
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type UploadStickerFileParameters struct {
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// User identifier of sticker file owner
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UserID int `json:"user_id"`
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// Png image with the sticker, must be up to 512 kilobytes in size,
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// dimensions must not exceed 512px, and either width or height
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// must be exactly 512px.
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PNGSticker interface{} `json:"png_sticker"`
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}
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// ErrBadFileType describes error of the unsupported file data type for uploading
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var ErrBadFileType = errors.New("bad file type")
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/*
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Upload is a helper method which provide are three ways to send files (photos, stickers, audio,
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media, etc.):
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1. If the file is already stored somewhere on the Telegram servers, you don't need to reupload it:
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each file object has a file_id field, simply pass this file_id as a parameter instead of uploading.
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There are no limits for files sent this way.
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2. Provide Telegram with an *fasthttp.URI for the file to be sent. Telegram will download and send the
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file. 5 MB max size for photos and 20 MB max for other types of content.
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3. Post the file using multipart/form-data in the usual way that files are uploaded via the
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browser. Use []byte or io.Reader for this. 10 MB max size for photos, 50 MB for other files.
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Sending by FileID
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* It is not possible to change the file type when resending by file_id. I.e. a video can't be sent
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as a photo, a photo can't be sent as a document, etc.
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* It is not possible to resend thumbnails.
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* Resending a photo by file_id will send all of its sizes.
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* file_id is unique for each individual bot and can't be transferred from one bot to another.
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Sending by URL
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* When sending by *fasthttp.URI the target file must have the correct MIME type (e.g., audio/mpeg for
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sendAudio, etc.).
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* In sendDocument, sending by URL will currently only work for gif, pdf and zip files.
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* To use SendVoice, the file must have the type audio/ogg and be no more than 1MB in size. 1–20MB
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voice notes will be sent as files.
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* Other configurations may work but we can't guarantee that they will.
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*/
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func (b *Bot) Upload(method, key, name string, file InputFile, args *http.Args) (*Response, error) {
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buffer := bytes.NewBuffer(nil)
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multi := multipart.NewWriter(buffer)
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requestURI := http.AcquireURI()
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requestURI.SetScheme("https")
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requestURI.SetHost("api.telegram.org")
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requestURI.SetPath(path.Join("bot"+b.AccessToken, method))
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args.VisitAll(func(key, value []byte) {
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_ = multi.WriteField(string(key), string(value))
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})
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if err := createFileField(multi, file, key, name); err != nil {
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return nil, err
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}
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if err := multi.Close(); err != nil {
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return nil, err
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}
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req := http.AcquireRequest()
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defer http.ReleaseRequest(req)
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req.SetBody(buffer.Bytes())
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req.Header.SetContentType(multi.FormDataContentType())
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req.Header.SetMethod("POST")
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req.Header.SetRequestURI(requestURI.String())
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req.Header.SetUserAgent(path.Join("telegram", Version))
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req.Header.SetHostBytes(requestURI.Host())
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resp := http.AcquireResponse()
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defer http.ReleaseResponse(resp)
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if err := http.Do(req, resp); err != nil {
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return nil, err
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}
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var response Response
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if err := parser.Unmarshal(resp.Body(), &response); err != nil {
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return nil, err
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}
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if !response.Ok {
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return nil, errors.New(response.Description)
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}
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return &response, nil
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}
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func createFileField(w *multipart.Writer, file interface{}, key, val string) (err error) {
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switch src := file.(type) {
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case string: // Send FileID of file on disk path
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return createFileFieldString(w, key, src)
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case *http.URI: // Send by URL
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return w.WriteField(key, src.String())
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case []byte: // Upload new
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return createFileFieldRaw(w, key, val, bytes.NewReader(src))
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case io.Reader: // Upload new
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return createFileFieldRaw(w, key, val, src)
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default:
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return ErrBadFileType
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}
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}
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func createFileFieldString(w *multipart.Writer, key, src string) (err error) {
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_, err = os.Stat(src)
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switch {
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case os.IsNotExist(err):
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err = w.WriteField(key, src)
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case os.IsExist(err):
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err = uploadFromDisk(w, key, src)
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}
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return
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}
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func uploadFromDisk(w *multipart.Writer, key, src string) error {
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file, err := os.Open(src)
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if err != nil {
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return err
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}
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defer func() {
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_ = file.Close()
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}()
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var formFile io.Writer
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formFile, err = w.CreateFormFile(key, file.Name())
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if err != nil {
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return err
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}
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_, err = io.Copy(formFile, file)
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return err
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}
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func createFileFieldRaw(w *multipart.Writer, key, value string, src io.Reader) error {
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field, err := w.CreateFormFile(key, value)
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if err != nil {
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return err
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}
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_, err = io.Copy(field, src)
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return err
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}
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// UploadStickerFile upload a .png file with a sticker for later use in
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// createNewStickerSet and addStickerToSet methods (can be used multiple times).
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// Returns the uploaded File on success.
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func (b *Bot) UploadStickerFile(userID int, pngSticker interface{}) (*File, error) {
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args := http.AcquireArgs()
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defer http.ReleaseArgs(args)
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args.SetUint("user_id", userID)
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resp, err := b.Upload(MethodUploadStickerFile, TypeSticker, "sticker", pngSticker, args)
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if err != nil {
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return nil, err
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}
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var f File
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err = parser.Unmarshal(resp.Result, &f)
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return &f, err
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}
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