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/*
GoToSocial
Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package media
import (
"bytes"
"errors"
"fmt"
"io"
"net/http"
"strconv"
"strings"
"github.com/gin-gonic/gin"
"github.com/superseriousbusiness/gotosocial/internal/config"
mastotypes "github.com/superseriousbusiness/gotosocial/internal/mastotypes/mastomodel"
"github.com/superseriousbusiness/gotosocial/internal/oauth"
)
// MediaCreatePOSTHandler handles requests to create/upload media attachments
func (m *Module) MediaCreatePOSTHandler(c *gin.Context) {
l := m.log.WithField("func", "statusCreatePOSTHandler")
authed, err := oauth.MustAuth(c, true, true, true, true) // posting new media is serious business so we want *everything*
if err != nil {
l.Debugf("couldn't auth: %s", err)
c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
return
}
// 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() {
l.Debugf("couldn't auth: %s", err)
c.JSON(http.StatusForbidden, gin.H{"error": "account is disabled, not yet approved, or suspended"})
return
}
// extract the media create form from the request context
l.Tracef("parsing request form: %s", c.Request.Form)
form := &mastotypes.AttachmentRequest{}
if err := c.ShouldBind(form); err != nil || form == nil {
l.Debugf("could not parse form from request: %s", err)
c.JSON(http.StatusBadRequest, gin.H{"error": "missing one or more required form values"})
return
}
// Give the fields on the request form a first pass to make sure the request is superficially valid.
l.Tracef("validating form %+v", form)
if err := validateCreateMedia(form, m.config.MediaConfig); err != nil {
l.Debugf("error validating form: %s", err)
c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
return
}
// open the attachment and extract the bytes from it
f, err := form.File.Open()
if err != nil {
l.Debugf("error opening attachment: %s", err)
c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("could not open provided attachment: %s", err)})
return
}
buf := new(bytes.Buffer)
size, err := io.Copy(buf, f)
if err != nil {
l.Debugf("error reading attachment: %s", err)
c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("could not read provided attachment: %s", err)})
return
}
if size == 0 {
l.Debug("could not read provided attachment: size 0 bytes")
c.JSON(http.StatusBadRequest, gin.H{"error": "could not read provided attachment: size 0 bytes"})
return
}
// allow the mediaHandler to work its magic of processing the attachment bytes, and putting them in whatever storage backend we're using
attachment, err := m.mediaHandler.ProcessLocalAttachment(buf.Bytes(), authed.Account.ID)
if err != nil {
l.Debugf("error reading attachment: %s", err)
c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("could not process attachment: %s", err)})
return
}
// 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 {
l.Debugf("improperly formatted focus %s", form.Focus)
c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("improperly formatted focus %s", form.Focus)})
return
}
xStr := spl[0]
yStr := spl[1]
if xStr == "" || yStr == "" {
l.Debugf("improperly formatted focus %s", form.Focus)
c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("improperly formatted focus %s", form.Focus)})
return
}
fx, err := strconv.ParseFloat(xStr, 32)
if err != nil {
l.Debugf("improperly formatted focus %s: %s", form.Focus, err)
c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("improperly formatted focus %s", form.Focus)})
return
}
if fx > 1 || fx < -1 {
l.Debugf("improperly formatted focus %s", form.Focus)
c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("improperly formatted focus %s", form.Focus)})
return
}
focusx = float32(fx)
fy, err := strconv.ParseFloat(yStr, 32)
if err != nil {
l.Debugf("improperly formatted focus %s: %s", form.Focus, err)
c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("improperly formatted focus %s", form.Focus)})
return
}
if fy > 1 || fy < -1 {
l.Debugf("improperly formatted focus %s", form.Focus)
c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("improperly formatted focus %s", form.Focus)})
return
}
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 := m.mastoConverter.AttachmentToMasto(attachment)
if err != nil {
l.Debugf("error parsing media attachment to frontend type: %s", err)
c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("error parsing media attachment to frontend type: %s", err)})
return
}
// now we can confidently put the attachment in the database
if err := m.db.Put(attachment); err != nil {
l.Debugf("error storing media attachment in db: %s", err)
c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("error storing media attachment in db: %s", err)})
return
}
// and return its frontend representation
c.JSON(http.StatusAccepted, mastoAttachment)
}
func validateCreateMedia(form *mastotypes.AttachmentRequest, config *config.MediaConfig) error {
// check there actually is a file attached and it's not size 0
if form.File == nil || form.File.Size == 0 {
return errors.New("no attachment given")
}
// a very superficial check to see if no size limits are exceeded
// we still don't actually know which media types we're dealing with but the other handlers will go into more detail there
maxSize := config.MaxVideoSize
if config.MaxImageSize > maxSize {
maxSize = config.MaxImageSize
}
if form.File.Size > int64(maxSize) {
return fmt.Errorf("file size limit exceeded: limit is %d bytes but attachment was %d bytes", maxSize, form.File.Size)
}
if len(form.Description) < config.MinDescriptionChars || len(form.Description) > config.MaxDescriptionChars {
return fmt.Errorf("image description length must be between %d and %d characters (inclusive), but provided image description was %d chars", config.MinDescriptionChars, config.MaxDescriptionChars, len(form.Description))
}
// TODO: validate focus here
return nil
}
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