mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-23 10:42:12 +00:00
104 lines
3.6 KiB
Go
104 lines
3.6 KiB
Go
/*
|
|
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 fileserver
|
|
|
|
import (
|
|
"bytes"
|
|
"net/http"
|
|
|
|
"github.com/gin-gonic/gin"
|
|
"github.com/sirupsen/logrus"
|
|
"github.com/superseriousbusiness/gotosocial/internal/api/model"
|
|
"github.com/superseriousbusiness/gotosocial/internal/oauth"
|
|
)
|
|
|
|
// ServeFile is for serving attachments, headers, and avatars to the requester from instance storage.
|
|
//
|
|
// Note: to mitigate scraping attempts, no information should be given out on a bad request except "404 page not found".
|
|
// Don't give away account ids or media ids or anything like that; callers shouldn't be able to infer anything.
|
|
func (m *FileServer) ServeFile(c *gin.Context) {
|
|
l := m.log.WithFields(logrus.Fields{
|
|
"func": "ServeFile",
|
|
"request_uri": c.Request.RequestURI,
|
|
"user_agent": c.Request.UserAgent(),
|
|
"origin_ip": c.ClientIP(),
|
|
})
|
|
l.Trace("received request")
|
|
|
|
authed, err := oauth.Authed(c, false, false, false, false)
|
|
if err != nil {
|
|
c.String(http.StatusNotFound, "404 page not found")
|
|
return
|
|
}
|
|
|
|
// We use request params to check what to pull out of the database/storage so check everything. A request URL should be formatted as follows:
|
|
// "https://example.org/fileserver/[ACCOUNT_ID]/[MEDIA_TYPE]/[MEDIA_SIZE]/[FILE_NAME]"
|
|
// "FILE_NAME" consists of two parts, the attachment's database id, a period, and the file extension.
|
|
accountID := c.Param(AccountIDKey)
|
|
if accountID == "" {
|
|
l.Debug("missing accountID from request")
|
|
c.String(http.StatusNotFound, "404 page not found")
|
|
return
|
|
}
|
|
|
|
mediaType := c.Param(MediaTypeKey)
|
|
if mediaType == "" {
|
|
l.Debug("missing mediaType from request")
|
|
c.String(http.StatusNotFound, "404 page not found")
|
|
return
|
|
}
|
|
|
|
mediaSize := c.Param(MediaSizeKey)
|
|
if mediaSize == "" {
|
|
l.Debug("missing mediaSize from request")
|
|
c.String(http.StatusNotFound, "404 page not found")
|
|
return
|
|
}
|
|
|
|
fileName := c.Param(FileNameKey)
|
|
if fileName == "" {
|
|
l.Debug("missing fileName from request")
|
|
c.String(http.StatusNotFound, "404 page not found")
|
|
return
|
|
}
|
|
|
|
content, err := m.processor.FileGet(authed, &model.GetContentRequestForm{
|
|
AccountID: accountID,
|
|
MediaType: mediaType,
|
|
MediaSize: mediaSize,
|
|
FileName: fileName,
|
|
})
|
|
if err != nil {
|
|
l.Debug(err)
|
|
c.String(http.StatusNotFound, "404 page not found")
|
|
return
|
|
}
|
|
|
|
// TODO: do proper content negotiation here -- if the requester only accepts text/html we should try to serve them *something*
|
|
// This is mostly needed because when sharing a link to a gts-hosted file on something like mastodon, the masto servers will
|
|
// attempt to look up the content to provide a preview of the link, and they ask for text/html.
|
|
if c.NegotiateFormat(content.ContentType) == "" {
|
|
l.Debugf("couldn't negotiate content for Accept headers %+v: we have content type %s", c.Request.Header.Get("Accepted"), content.ContentType)
|
|
c.AbortWithStatus(http.StatusNotAcceptable)
|
|
return
|
|
}
|
|
|
|
c.DataFromReader(http.StatusOK, content.ContentLength, content.ContentType, bytes.NewReader(content.Content), nil)
|
|
}
|