194 lines
7.5 KiB
Go
194 lines
7.5 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package media
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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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"net/http"
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"strconv"
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"strings"
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"github.com/gin-gonic/gin"
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"github.com/superseriousbusiness/gotosocial/internal/config"
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mastotypes "github.com/superseriousbusiness/gotosocial/internal/mastotypes/mastomodel"
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"github.com/superseriousbusiness/gotosocial/internal/oauth"
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)
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// MediaCreatePOSTHandler handles requests to create/upload media attachments
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func (m *Module) MediaCreatePOSTHandler(c *gin.Context) {
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l := m.log.WithField("func", "statusCreatePOSTHandler")
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authed, err := oauth.MustAuth(c, true, true, true, true) // posting new media is serious business so we want *everything*
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if err != nil {
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l.Debugf("couldn't auth: %s", err)
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c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
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return
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}
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// First check this user/account is permitted to create media
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// There's no point continuing otherwise.
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if authed.User.Disabled || !authed.User.Approved || !authed.Account.SuspendedAt.IsZero() {
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l.Debugf("couldn't auth: %s", err)
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c.JSON(http.StatusForbidden, gin.H{"error": "account is disabled, not yet approved, or suspended"})
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return
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}
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// extract the media create form from the request context
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l.Tracef("parsing request form: %s", c.Request.Form)
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form := &mastotypes.AttachmentRequest{}
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if err := c.ShouldBind(form); err != nil || form == nil {
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l.Debugf("could not parse form from request: %s", err)
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c.JSON(http.StatusBadRequest, gin.H{"error": "missing one or more required form values"})
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return
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}
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// Give the fields on the request form a first pass to make sure the request is superficially valid.
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l.Tracef("validating form %+v", form)
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if err := validateCreateMedia(form, m.config.MediaConfig); err != nil {
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l.Debugf("error validating form: %s", err)
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c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
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return
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}
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// open the attachment and extract the bytes from it
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f, err := form.File.Open()
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if err != nil {
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l.Debugf("error opening attachment: %s", err)
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c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("could not open provided attachment: %s", err)})
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return
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}
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buf := new(bytes.Buffer)
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size, err := io.Copy(buf, f)
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if err != nil {
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l.Debugf("error reading attachment: %s", err)
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c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("could not read provided attachment: %s", err)})
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return
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}
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if size == 0 {
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l.Debug("could not read provided attachment: size 0 bytes")
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c.JSON(http.StatusBadRequest, gin.H{"error": "could not read provided attachment: size 0 bytes"})
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return
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}
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// allow the mediaHandler to work its magic of processing the attachment bytes, and putting them in whatever storage backend we're using
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attachment, err := m.mediaHandler.ProcessLocalAttachment(buf.Bytes(), authed.Account.ID)
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if err != nil {
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l.Debugf("error reading attachment: %s", err)
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c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("could not process attachment: %s", err)})
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return
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}
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// now we need to add extra fields that the attachment processor doesn't know (from the form)
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// TODO: handle this inside mediaHandler.ProcessAttachment (just pass more params to it)
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// first description
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attachment.Description = form.Description
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// now parse the focus parameter
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// TODO: tidy this up into a separate function and just return an error so all the c.JSON and return calls are obviated
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var focusx, focusy float32
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if form.Focus != "" {
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spl := strings.Split(form.Focus, ",")
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if len(spl) != 2 {
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l.Debugf("improperly formatted focus %s", form.Focus)
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c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("improperly formatted focus %s", form.Focus)})
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return
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}
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xStr := spl[0]
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yStr := spl[1]
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if xStr == "" || yStr == "" {
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l.Debugf("improperly formatted focus %s", form.Focus)
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c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("improperly formatted focus %s", form.Focus)})
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return
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}
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fx, err := strconv.ParseFloat(xStr, 32)
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if err != nil {
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l.Debugf("improperly formatted focus %s: %s", form.Focus, err)
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c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("improperly formatted focus %s", form.Focus)})
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return
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}
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if fx > 1 || fx < -1 {
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l.Debugf("improperly formatted focus %s", form.Focus)
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c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("improperly formatted focus %s", form.Focus)})
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return
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}
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focusx = float32(fx)
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fy, err := strconv.ParseFloat(yStr, 32)
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if err != nil {
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l.Debugf("improperly formatted focus %s: %s", form.Focus, err)
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c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("improperly formatted focus %s", form.Focus)})
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return
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}
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if fy > 1 || fy < -1 {
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l.Debugf("improperly formatted focus %s", form.Focus)
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c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("improperly formatted focus %s", form.Focus)})
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return
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}
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focusy = float32(fy)
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}
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attachment.FileMeta.Focus.X = focusx
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attachment.FileMeta.Focus.Y = focusy
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// prepare the frontend representation now -- if there are any errors here at least we can bail without
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// having already put something in the database and then having to clean it up again (eugh)
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mastoAttachment, err := m.mastoConverter.AttachmentToMasto(attachment)
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if err != nil {
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l.Debugf("error parsing media attachment to frontend type: %s", err)
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c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("error parsing media attachment to frontend type: %s", err)})
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return
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}
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// now we can confidently put the attachment in the database
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if err := m.db.Put(attachment); err != nil {
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l.Debugf("error storing media attachment in db: %s", err)
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c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("error storing media attachment in db: %s", err)})
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return
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}
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// and return its frontend representation
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c.JSON(http.StatusAccepted, mastoAttachment)
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}
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func validateCreateMedia(form *mastotypes.AttachmentRequest, config *config.MediaConfig) error {
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// check there actually is a file attached and it's not size 0
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if form.File == nil || form.File.Size == 0 {
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return errors.New("no attachment given")
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}
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// a very superficial check to see if no size limits are exceeded
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// we still don't actually know which media types we're dealing with but the other handlers will go into more detail there
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maxSize := config.MaxVideoSize
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if config.MaxImageSize > maxSize {
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maxSize = config.MaxImageSize
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}
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if form.File.Size > int64(maxSize) {
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return fmt.Errorf("file size limit exceeded: limit is %d bytes but attachment was %d bytes", maxSize, form.File.Size)
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}
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if len(form.Description) < config.MinDescriptionChars || len(form.Description) > config.MaxDescriptionChars {
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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))
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}
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// TODO: validate focus here
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return nil
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}
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