89 lines
2.4 KiB
Go
89 lines
2.4 KiB
Go
package telegram
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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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"os"
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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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// There are three ways to send files (photos, stickers, audio, media, etc.):
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//
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// 1. If the file is already stored somewhere on the Telegram servers, you don't need to reupload it: each file object has a file_id field, simply pass this file_id as a parameter instead of uploading. There are no limits for files sent this way.
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// 2. Provide Telegram with an HTTP URL for the file to be sent. Telegram will download and send the 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 browser. 10 MB max size for photos, 50 MB for other files.
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func (bot *Bot) upload(file InputFile, fieldName, fileName, method string, args *http.Args) (*Response, error) {
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var buffer bytes.Buffer
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multi := multipart.NewWriter(&buffer)
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defer multi.Close()
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switch source := file.(type) {
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case string:
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f, err := os.Open(source)
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if err != nil {
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return nil, err
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}
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defer f.Close()
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formFile, err := multi.CreateFormFile(fieldName, f.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, f); err != nil {
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return nil, err
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}
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case []byte:
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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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if _, err = io.Copy(formFile, bytes.NewReader(source)); err != nil {
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return nil, err
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}
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case *url.URL:
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if err := multi.WriteField(fieldName, source.String()); err != nil {
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return nil, err
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}
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case io.Reader:
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multi.CreateFormFile(fieldName, fileName)
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default:
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return nil, errors.New("bad file type")
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}
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requestURI := fmt.Sprintf(APIEndpoint, bot.AccessToken, method)
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if args != nil {
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requestURI += fmt.Sprint("?", args.String())
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}
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var req http.Request
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var resp http.Response
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req.Header.SetMethod("POST")
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req.Header.SetContentType("multipart/form-data")
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req.Header.SetMultipartFormBoundary(multi.Boundary())
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args.WriteTo(req.BodyWriter())
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req.SetRequestURI(requestURI)
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req.SetBody(buffer.Bytes())
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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 data Response
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if err := json.Unmarshal(resp.Body(), &data); err != nil {
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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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