func uploadEmojiImage(id string, imageData *multipart.FileHeader) *model.AppError {
file, err := imageData.Open()
if err != nil {
return model.NewLocAppError("uploadEmojiImage", "api.emoji.upload.open.app_error", nil, "")
}
defer file.Close()
buf := bytes.NewBuffer(nil)
io.Copy(buf, file)
// make sure the file is an image and is within the required dimensions
if config, _, err := image.DecodeConfig(bytes.NewReader(buf.Bytes())); err != nil {
return model.NewLocAppError("uploadEmojiImage", "api.emoji.upload.image.app_error", nil, err.Error())
} else if config.Width > MaxEmojiWidth || config.Height > MaxEmojiHeight {
data := buf.Bytes()
newbuf := bytes.NewBuffer(nil)
if info, err := model.GetInfoForBytes(imageData.Filename, data); err != nil {
return err
} else if info.MimeType == "image/gif" {
if gif_data, err := gif.DecodeAll(bytes.NewReader(data)); err != nil {
return model.NewLocAppError("uploadEmojiImage", "api.emoji.upload.large_image.gif_decode_error", nil, "")
} else {
resized_gif := resizeEmojiGif(gif_data)
if err := gif.EncodeAll(newbuf, resized_gif); err != nil {
return model.NewLocAppError("uploadEmojiImage", "api.emoji.upload.large_image.gif_encode_error", nil, "")
}
if err := app.WriteFile(newbuf.Bytes(), getEmojiImagePath(id)); err != nil {
return err
}
}
} else {
if img, _, err := image.Decode(bytes.NewReader(data)); err != nil {
return model.NewLocAppError("uploadEmojiImage", "api.emoji.upload.large_image.decode_error", nil, "")
} else {
resized_image := resizeEmoji(img, config.Width, config.Height)
if err := png.Encode(newbuf, resized_image); err != nil {
return model.NewLocAppError("uploadEmojiImage", "api.emoji.upload.large_image.encode_error", nil, "")
}
if err := app.WriteFile(newbuf.Bytes(), getEmojiImagePath(id)); err != nil {
return err
}
}
}
} else {
if err := app.WriteFile(buf.Bytes(), getEmojiImagePath(id)); err != nil {
return err
}
}
return nil
}
func generateThumbnailImage(img image.Image, thumbnailPath string, width int, height int) {
thumbWidth := float64(utils.Cfg.FileSettings.ThumbnailWidth)
thumbHeight := float64(utils.Cfg.FileSettings.ThumbnailHeight)
imgWidth := float64(width)
imgHeight := float64(height)
var thumbnail image.Image
if imgHeight < thumbHeight && imgWidth < thumbWidth {
thumbnail = img
} else if imgHeight/imgWidth < thumbHeight/thumbWidth {
thumbnail = imaging.Resize(img, 0, utils.Cfg.FileSettings.ThumbnailHeight, imaging.Lanczos)
} else {
thumbnail = imaging.Resize(img, utils.Cfg.FileSettings.ThumbnailWidth, 0, imaging.Lanczos)
}
buf := new(bytes.Buffer)
if err := jpeg.Encode(buf, thumbnail, &jpeg.Options{Quality: 90}); err != nil {
l4g.Error(utils.T("api.file.handle_images_forget.encode_jpeg.error"), thumbnailPath, err)
return
}
if err := app.WriteFile(buf.Bytes(), thumbnailPath); err != nil {
l4g.Error(utils.T("api.file.handle_images_forget.upload_thumb.error"), thumbnailPath, err)
return
}
}
func createTestEmoji(t *testing.T, emoji *model.Emoji, imageData []byte) *model.Emoji {
emoji = store.Must(app.Srv.Store.Emoji().Save(emoji)).(*model.Emoji)
if err := app.WriteFile(imageData, "emoji/"+emoji.Id+"/image"); err != nil {
store.Must(app.Srv.Store.Emoji().Delete(emoji.Id, time.Now().Unix()))
t.Fatalf("failed to write image: %v", err.Error())
}
return emoji
}
func generatePreviewImage(img image.Image, previewPath string, width int) {
var preview image.Image
if width > int(utils.Cfg.FileSettings.PreviewWidth) {
preview = imaging.Resize(img, utils.Cfg.FileSettings.PreviewWidth, utils.Cfg.FileSettings.PreviewHeight, imaging.Lanczos)
} else {
preview = img
}
buf := new(bytes.Buffer)
if err := jpeg.Encode(buf, preview, &jpeg.Options{Quality: 90}); err != nil {
l4g.Error(utils.T("api.file.handle_images_forget.encode_preview.error"), previewPath, err)
return
}
if err := app.WriteFile(buf.Bytes(), previewPath); err != nil {
l4g.Error(utils.T("api.file.handle_images_forget.upload_preview.error"), previewPath, err)
return
}
}
func doUploadFile(teamId string, channelId string, userId string, rawFilename string, data []byte) (*model.FileInfo, *model.AppError) {
filename := filepath.Base(rawFilename)
info, err := model.GetInfoForBytes(filename, data)
if err != nil {
err.StatusCode = http.StatusBadRequest
return nil, err
}
info.Id = model.NewId()
info.CreatorId = userId
pathPrefix := "teams/" + teamId + "/channels/" + channelId + "/users/" + userId + "/" + info.Id + "/"
info.Path = pathPrefix + filename
if info.IsImage() {
// Check dimensions before loading the whole thing into memory later on
if info.Width*info.Height > MaxImageSize {
err := model.NewLocAppError("uploadFile", "api.file.upload_file.large_image.app_error", map[string]interface{}{"Filename": filename}, "")
err.StatusCode = http.StatusBadRequest
return nil, err
}
nameWithoutExtension := filename[:strings.LastIndex(filename, ".")]
info.PreviewPath = pathPrefix + nameWithoutExtension + "_preview.jpg"
info.ThumbnailPath = pathPrefix + nameWithoutExtension + "_thumb.jpg"
}
if err := app.WriteFile(data, info.Path); err != nil {
return nil, err
}
if result := <-app.Srv.Store.FileInfo().Save(info); result.Err != nil {
return nil, result.Err
}
return info, nil
}