package message import ( "bytes" "errors" "fmt" "io" "strconv" "strings" apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model" "github.com/superseriousbusiness/gotosocial/internal/gtsmodel" "github.com/superseriousbusiness/gotosocial/internal/media" "github.com/superseriousbusiness/gotosocial/internal/oauth" ) func (p *processor) MediaCreate(authed *oauth.Auth, form *apimodel.AttachmentRequest) (*apimodel.Attachment, error) { // First check this user/account is permitted to create media // There's no point continuing otherwise. if authed.User.Disabled || !authed.User.Approved || !authed.Account.SuspendedAt.IsZero() { return nil, errors.New("not authorized to post new media") } // open the attachment and extract the bytes from it f, err := form.File.Open() if err != nil { return nil, fmt.Errorf("error opening attachment: %s", err) } buf := new(bytes.Buffer) size, err := io.Copy(buf, f) if err != nil { return nil, fmt.Errorf("error reading attachment: %s", err) } if size == 0 { return nil, errors.New("could not read provided attachment: size 0 bytes") } // allow the mediaHandler to work its magic of processing the attachment bytes, and putting them in whatever storage backend we're using attachment, err := p.mediaHandler.ProcessLocalAttachment(buf.Bytes(), authed.Account.ID) if err != nil { return nil, fmt.Errorf("error reading attachment: %s", err) } // now we need to add extra fields that the attachment processor doesn't know (from the form) // TODO: handle this inside mediaHandler.ProcessAttachment (just pass more params to it) // first description attachment.Description = form.Description // now parse the focus parameter // TODO: tidy this up into a separate function and just return an error so all the c.JSON and return calls are obviated var focusx, focusy float32 if form.Focus != "" { spl := strings.Split(form.Focus, ",") if len(spl) != 2 { return nil, fmt.Errorf("improperly formatted focus %s", form.Focus) } xStr := spl[0] yStr := spl[1] if xStr == "" || yStr == "" { return nil, fmt.Errorf("improperly formatted focus %s", form.Focus) } fx, err := strconv.ParseFloat(xStr, 32) if err != nil { return nil, fmt.Errorf("improperly formatted focus %s: %s", form.Focus, err) } if fx > 1 || fx < -1 { return nil, fmt.Errorf("improperly formatted focus %s", form.Focus) } focusx = float32(fx) fy, err := strconv.ParseFloat(yStr, 32) if err != nil { return nil, fmt.Errorf("improperly formatted focus %s: %s", form.Focus, err) } if fy > 1 || fy < -1 { return nil, fmt.Errorf("improperly formatted focus %s", form.Focus) } focusy = float32(fy) } attachment.FileMeta.Focus.X = focusx attachment.FileMeta.Focus.Y = focusy // prepare the frontend representation now -- if there are any errors here at least we can bail without // having already put something in the database and then having to clean it up again (eugh) mastoAttachment, err := p.tc.AttachmentToMasto(attachment) if err != nil { return nil, fmt.Errorf("error parsing media attachment to frontend type: %s", err) } // now we can confidently put the attachment in the database if err := p.db.Put(attachment); err != nil { return nil, fmt.Errorf("error storing media attachment in db: %s", err) } return &mastoAttachment, nil } func (p *processor) MediaGet(authed *oauth.Auth, form *apimodel.GetContentRequestForm) (*apimodel.Content, error) { // parse the form fields mediaSize, err := media.ParseMediaSize(form.MediaSize) if err != nil { return nil, NewErrorNotFound(fmt.Errorf("media size %s not valid", form.MediaSize)) } mediaType, err := media.ParseMediaType(form.MediaType) if err != nil { return nil, NewErrorNotFound(fmt.Errorf("media type %s not valid", form.MediaType)) } spl := strings.Split(form.FileName, ".") if len(spl) != 2 || spl[0] == "" || spl[1] == "" { return nil, NewErrorNotFound(fmt.Errorf("file name %s not parseable", form.FileName)) } wantedMediaID := spl[0] // get the account that owns the media and make sure it's not suspended acct := >smodel.Account{} if err := p.db.GetByID(form.AccountID, acct); err != nil { return nil, NewErrorNotFound(fmt.Errorf("account with id %s could not be selected from the db: %s", form.AccountID, err)) } if !acct.SuspendedAt.IsZero() { return nil, NewErrorNotFound(fmt.Errorf("account with id %s is suspended", form.AccountID)) } // make sure the requesting account and the media account don't block each other if authed.Account != nil { blocked, err := p.db.Blocked(authed.Account.ID, form.AccountID) if err != nil { return nil, NewErrorNotFound(fmt.Errorf("block status could not be established between accounts %s and %s: %s", form.AccountID, authed.Account.ID, err)) } if blocked { return nil, NewErrorNotFound(fmt.Errorf("block exists between accounts %s and %s", form.AccountID, authed.Account.ID)) } } // the way we store emojis is a little different from the way we store other attachments, // so we need to take different steps depending on the media type being requested content := &apimodel.Content{} var storagePath string switch mediaType { case media.Emoji: e := >smodel.Emoji{} if err := p.db.GetByID(wantedMediaID, e); err != nil { return nil, NewErrorNotFound(fmt.Errorf("emoji %s could not be taken from the db: %s", wantedMediaID, err)) } if e.Disabled { return nil, NewErrorNotFound(fmt.Errorf("emoji %s has been disabled", wantedMediaID)) } switch mediaSize { case media.Original: content.ContentType = e.ImageContentType storagePath = e.ImagePath case media.Static: content.ContentType = e.ImageStaticContentType storagePath = e.ImageStaticPath default: return nil, NewErrorNotFound(fmt.Errorf("media size %s not recognized for emoji", mediaSize)) } case media.Attachment, media.Header, media.Avatar: a := >smodel.MediaAttachment{} if err := p.db.GetByID(wantedMediaID, a); err != nil { return nil, NewErrorNotFound(fmt.Errorf("attachment %s could not be taken from the db: %s", wantedMediaID, err)) } if a.AccountID != form.AccountID { return nil, NewErrorNotFound(fmt.Errorf("attachment %s is not owned by %s", wantedMediaID, form.AccountID)) } switch mediaSize { case media.Original: content.ContentType = a.File.ContentType storagePath = a.File.Path case media.Small: content.ContentType = a.Thumbnail.ContentType storagePath = a.Thumbnail.Path default: return nil, NewErrorNotFound(fmt.Errorf("media size %s not recognized for attachment", mediaSize)) } } bytes, err := p.storage.RetrieveFileFrom(storagePath) if err != nil { return nil, NewErrorNotFound(fmt.Errorf("error retrieving from storage: %s", err)) } content.ContentLength = int64(len(bytes)) content.Content = bytes return content, nil }