2017-11-22 10:29:45 +00:00
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package telegram
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2017-12-13 14:02:07 +00:00
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import (
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"bytes"
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"errors"
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"fmt"
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"io"
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"mime/multipart"
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"net/url"
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2018-02-14 21:53:40 +00:00
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"os"
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2017-12-13 14:02:07 +00:00
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log "github.com/kirillDanshin/dlog"
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json "github.com/pquerna/ffjson/ffjson"
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http "github.com/valyala/fasthttp"
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)
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var ErrBadFileType = errors.New("bad file type")
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2018-02-15 23:28:49 +00:00
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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 *url.URL 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 file_id
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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 *url.URL 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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2017-12-22 15:37:32 +00:00
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func (bot *Bot) upload(file InputFile, fieldName, fileName, method string, args *http.Args) (*Response, error) {
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2017-12-13 14:02:07 +00:00
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buffer := bytes.NewBuffer(nil)
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multi := multipart.NewWriter(buffer)
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requestURI := &url.URL{
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Scheme: "https",
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Host: "api.telegram.org",
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Path: fmt.Sprint("/bot", bot.AccessToken, "/", method),
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}
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query, err := url.ParseQuery(args.String())
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if err != nil {
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return nil, err
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}
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for key, val := range query {
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2018-02-15 23:28:49 +00:00
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if err = multi.WriteField(key, val[0]); err != nil {
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return nil, err
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}
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}
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switch f := file.(type) {
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2018-02-15 23:28:49 +00:00
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case string:
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if _, err = os.Stat(f); os.IsNotExist(err) {
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2018-02-15 23:28:49 +00:00
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// Send by 'file_id'
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if err = multi.WriteField(fieldName, f); err != nil {
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return nil, err
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}
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} else {
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2018-02-15 23:28:49 +00:00
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// Upload new
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2017-12-19 20:36:09 +00:00
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src, err := os.Open(f)
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if err != nil {
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return nil, err
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}
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defer src.Close()
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formFile, err := multi.CreateFormFile(fieldName, src.Name())
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if err != nil {
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return nil, err
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}
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if _, err = io.Copy(formFile, src); err != nil {
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return nil, err
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}
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2018-02-14 21:53:40 +00:00
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}
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2017-12-19 20:36:09 +00:00
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case []byte: // Upload new
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formFile, err := multi.CreateFormFile(fieldName, fileName)
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if err != nil {
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return nil, err
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}
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2017-12-19 20:38:08 +00:00
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2017-12-13 14:02:07 +00:00
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if _, err = io.Copy(formFile, bytes.NewReader(f)); err != nil {
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return nil, err
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}
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2017-12-19 20:38:08 +00:00
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case *url.URL: // Send by URL
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2018-02-15 23:28:49 +00:00
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if err = multi.WriteField(fieldName, f.String()); err != nil {
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return nil, err
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}
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case io.Reader: // Upload new
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if _, err = multi.CreateFormFile(fieldName, fileName); err != nil {
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return nil, err
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}
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default:
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return nil, ErrBadFileType
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}
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2017-12-19 20:38:08 +00:00
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2018-02-15 23:28:49 +00:00
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if err = multi.Close(); err != nil {
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2017-12-13 14:02:07 +00:00
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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("go-telegram/3.5")
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2017-12-19 20:38:55 +00:00
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req.Header.SetHost("api.telegram.org")
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2017-12-13 14:02:07 +00:00
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log.Ln("Request:")
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2017-12-22 15:37:32 +00:00
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log.D(req)
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2017-12-13 14:02:07 +00:00
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resp := http.AcquireResponse()
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defer http.ReleaseResponse(resp)
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2018-02-15 23:28:49 +00:00
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if err = http.Do(req, resp); err != nil {
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2017-12-13 14:02:07 +00:00
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log.Ln("Resp:")
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2017-12-22 15:37:32 +00:00
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log.D(resp)
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2017-12-13 14:02:07 +00:00
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return nil, err
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}
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log.Ln("Resp:")
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2017-12-22 15:37:32 +00:00
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log.D(resp)
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var data Response
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if err = json.Unmarshal(resp.Body(), &data); err != nil {
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2017-12-13 14:02:07 +00:00
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return nil, err
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}
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if !data.Ok {
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return nil, errors.New(data.Description)
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}
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return &data, nil
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}
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