mirror of
https://github.com/1f349/dendrite.git
synced 2024-11-08 18:16:59 +00:00
270 lines
10 KiB
Go
270 lines
10 KiB
Go
// Copyright 2017 Vector Creations Ltd
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package routing
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
"net/url"
|
|
"path"
|
|
"strings"
|
|
|
|
"github.com/matrix-org/dendrite/clientapi/jsonerror"
|
|
"github.com/matrix-org/dendrite/common/config"
|
|
"github.com/matrix-org/dendrite/mediaapi/fileutils"
|
|
"github.com/matrix-org/dendrite/mediaapi/storage"
|
|
"github.com/matrix-org/dendrite/mediaapi/thumbnailer"
|
|
"github.com/matrix-org/dendrite/mediaapi/types"
|
|
"github.com/matrix-org/gomatrixserverlib"
|
|
"github.com/matrix-org/util"
|
|
log "github.com/sirupsen/logrus"
|
|
)
|
|
|
|
// uploadRequest metadata included in or derivable from an upload request
|
|
// https://matrix.org/docs/spec/client_server/r0.2.0.html#post-matrix-media-r0-upload
|
|
// NOTE: The members come from HTTP request metadata such as headers, query parameters or can be derived from such
|
|
type uploadRequest struct {
|
|
MediaMetadata *types.MediaMetadata
|
|
Logger *log.Entry
|
|
}
|
|
|
|
// uploadResponse defines the format of the JSON response
|
|
// https://matrix.org/docs/spec/client_server/r0.2.0.html#post-matrix-media-r0-upload
|
|
type uploadResponse struct {
|
|
ContentURI string `json:"content_uri"`
|
|
}
|
|
|
|
// Upload implements /upload
|
|
// This endpoint involves uploading potentially significant amounts of data to the homeserver.
|
|
// This implementation supports a configurable maximum file size limit in bytes. If a user tries to upload more than this, they will receive an error that their upload is too large.
|
|
// Uploaded files are processed piece-wise to avoid DoS attacks which would starve the server of memory.
|
|
// TODO: We should time out requests if they have not received any data within a configured timeout period.
|
|
func Upload(req *http.Request, cfg *config.Dendrite, db *storage.Database, activeThumbnailGeneration *types.ActiveThumbnailGeneration) util.JSONResponse {
|
|
r, resErr := parseAndValidateRequest(req, cfg)
|
|
if resErr != nil {
|
|
return *resErr
|
|
}
|
|
|
|
if resErr = r.doUpload(req.Context(), req.Body, cfg, db, activeThumbnailGeneration); resErr != nil {
|
|
return *resErr
|
|
}
|
|
|
|
return util.JSONResponse{
|
|
Code: http.StatusOK,
|
|
JSON: uploadResponse{
|
|
ContentURI: fmt.Sprintf("mxc://%s/%s", cfg.Matrix.ServerName, r.MediaMetadata.MediaID),
|
|
},
|
|
}
|
|
}
|
|
|
|
// parseAndValidateRequest parses the incoming upload request to validate and extract
|
|
// all the metadata about the media being uploaded.
|
|
// Returns either an uploadRequest or an error formatted as a util.JSONResponse
|
|
func parseAndValidateRequest(req *http.Request, cfg *config.Dendrite) (*uploadRequest, *util.JSONResponse) {
|
|
if req.Method != http.MethodPost {
|
|
return nil, &util.JSONResponse{
|
|
Code: http.StatusMethodNotAllowed,
|
|
JSON: jsonerror.Unknown("HTTP request method must be POST."),
|
|
}
|
|
}
|
|
|
|
r := &uploadRequest{
|
|
MediaMetadata: &types.MediaMetadata{
|
|
Origin: cfg.Matrix.ServerName,
|
|
FileSizeBytes: types.FileSizeBytes(req.ContentLength),
|
|
ContentType: types.ContentType(req.Header.Get("Content-Type")),
|
|
UploadName: types.Filename(url.PathEscape(req.FormValue("filename"))),
|
|
},
|
|
Logger: util.GetLogger(req.Context()).WithField("Origin", cfg.Matrix.ServerName),
|
|
}
|
|
|
|
if resErr := r.Validate(*cfg.Media.MaxFileSizeBytes); resErr != nil {
|
|
return nil, resErr
|
|
}
|
|
|
|
return r, nil
|
|
}
|
|
|
|
func (r *uploadRequest) doUpload(
|
|
ctx context.Context,
|
|
reqReader io.Reader,
|
|
cfg *config.Dendrite,
|
|
db *storage.Database,
|
|
activeThumbnailGeneration *types.ActiveThumbnailGeneration,
|
|
) *util.JSONResponse {
|
|
r.Logger.WithFields(log.Fields{
|
|
"UploadName": r.MediaMetadata.UploadName,
|
|
"FileSizeBytes": r.MediaMetadata.FileSizeBytes,
|
|
"ContentType": r.MediaMetadata.ContentType,
|
|
}).Info("Uploading file")
|
|
|
|
// The file data is hashed and the hash is used as the MediaID. The hash is useful as a
|
|
// method of deduplicating files to save storage, as well as a way to conduct
|
|
// integrity checks on the file data in the repository.
|
|
// Data is truncated to maxFileSizeBytes. Content-Length was reported as 0 < Content-Length <= maxFileSizeBytes so this is OK.
|
|
hash, bytesWritten, tmpDir, err := fileutils.WriteTempFile(reqReader, *cfg.Media.MaxFileSizeBytes, cfg.Media.AbsBasePath)
|
|
if err != nil {
|
|
r.Logger.WithError(err).WithFields(log.Fields{
|
|
"MaxFileSizeBytes": *cfg.Media.MaxFileSizeBytes,
|
|
}).Warn("Error while transferring file")
|
|
fileutils.RemoveDir(tmpDir, r.Logger)
|
|
return &util.JSONResponse{
|
|
Code: http.StatusBadRequest,
|
|
JSON: jsonerror.Unknown("Failed to upload"),
|
|
}
|
|
}
|
|
|
|
r.MediaMetadata.FileSizeBytes = bytesWritten
|
|
r.MediaMetadata.Base64Hash = hash
|
|
r.MediaMetadata.MediaID = types.MediaID(hash)
|
|
|
|
r.Logger = r.Logger.WithField("MediaID", r.MediaMetadata.MediaID)
|
|
|
|
r.Logger.WithFields(log.Fields{
|
|
"Base64Hash": r.MediaMetadata.Base64Hash,
|
|
"UploadName": r.MediaMetadata.UploadName,
|
|
"FileSizeBytes": r.MediaMetadata.FileSizeBytes,
|
|
"ContentType": r.MediaMetadata.ContentType,
|
|
}).Info("File uploaded")
|
|
|
|
// check if we already have a record of the media in our database and if so, we can remove the temporary directory
|
|
mediaMetadata, err := db.GetMediaMetadata(
|
|
ctx, r.MediaMetadata.MediaID, r.MediaMetadata.Origin,
|
|
)
|
|
if err != nil {
|
|
r.Logger.WithError(err).Error("Error querying the database.")
|
|
resErr := jsonerror.InternalServerError()
|
|
return &resErr
|
|
}
|
|
|
|
if mediaMetadata != nil {
|
|
r.MediaMetadata = mediaMetadata
|
|
fileutils.RemoveDir(tmpDir, r.Logger)
|
|
return &util.JSONResponse{
|
|
Code: http.StatusOK,
|
|
JSON: uploadResponse{
|
|
ContentURI: fmt.Sprintf("mxc://%s/%s", cfg.Matrix.ServerName, r.MediaMetadata.MediaID),
|
|
},
|
|
}
|
|
}
|
|
|
|
return r.storeFileAndMetadata(
|
|
ctx, tmpDir, cfg.Media.AbsBasePath, db, cfg.Media.ThumbnailSizes,
|
|
activeThumbnailGeneration, cfg.Media.MaxThumbnailGenerators,
|
|
)
|
|
}
|
|
|
|
// Validate validates the uploadRequest fields
|
|
func (r *uploadRequest) Validate(maxFileSizeBytes config.FileSizeBytes) *util.JSONResponse {
|
|
if r.MediaMetadata.FileSizeBytes < 1 {
|
|
return &util.JSONResponse{
|
|
Code: http.StatusLengthRequired,
|
|
JSON: jsonerror.Unknown("HTTP Content-Length request header must be greater than zero."),
|
|
}
|
|
}
|
|
if maxFileSizeBytes > 0 && r.MediaMetadata.FileSizeBytes > types.FileSizeBytes(maxFileSizeBytes) {
|
|
return &util.JSONResponse{
|
|
Code: http.StatusRequestEntityTooLarge,
|
|
JSON: jsonerror.Unknown(fmt.Sprintf("HTTP Content-Length is greater than the maximum allowed upload size (%v).", maxFileSizeBytes)),
|
|
}
|
|
}
|
|
// TODO: Check if the Content-Type is a valid type?
|
|
if r.MediaMetadata.ContentType == "" {
|
|
return &util.JSONResponse{
|
|
Code: http.StatusBadRequest,
|
|
JSON: jsonerror.Unknown("HTTP Content-Type request header must be set."),
|
|
}
|
|
}
|
|
if strings.HasPrefix(string(r.MediaMetadata.UploadName), "~") {
|
|
return &util.JSONResponse{
|
|
Code: http.StatusBadRequest,
|
|
JSON: jsonerror.Unknown("File name must not begin with '~'."),
|
|
}
|
|
}
|
|
// TODO: Validate filename - what are the valid characters?
|
|
if r.MediaMetadata.UserID != "" {
|
|
// TODO: We should put user ID parsing code into gomatrixserverlib and use that instead
|
|
// (see https://github.com/matrix-org/gomatrixserverlib/blob/3394e7c7003312043208aa73727d2256eea3d1f6/eventcontent.go#L347 )
|
|
// It should be a struct (with pointers into a single string to avoid copying) and
|
|
// we should update all refs to use UserID types rather than strings.
|
|
// https://github.com/matrix-org/synapse/blob/v0.19.2/synapse/types.py#L92
|
|
if _, _, err := gomatrixserverlib.SplitID('@', string(r.MediaMetadata.UserID)); err != nil {
|
|
return &util.JSONResponse{
|
|
Code: http.StatusBadRequest,
|
|
JSON: jsonerror.BadJSON("user id must be in the form @localpart:domain"),
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// storeFileAndMetadata moves the temporary file to its final path based on metadata and stores the metadata in the database
|
|
// See getPathFromMediaMetadata in fileutils for details of the final path.
|
|
// The order of operations is important as it avoids metadata entering the database before the file
|
|
// is ready, and if we fail to move the file, it never gets added to the database.
|
|
// Returns a util.JSONResponse error and cleans up directories in case of error.
|
|
func (r *uploadRequest) storeFileAndMetadata(
|
|
ctx context.Context,
|
|
tmpDir types.Path,
|
|
absBasePath config.Path,
|
|
db *storage.Database,
|
|
thumbnailSizes []config.ThumbnailSize,
|
|
activeThumbnailGeneration *types.ActiveThumbnailGeneration,
|
|
maxThumbnailGenerators int,
|
|
) *util.JSONResponse {
|
|
finalPath, duplicate, err := fileutils.MoveFileWithHashCheck(tmpDir, r.MediaMetadata, absBasePath, r.Logger)
|
|
if err != nil {
|
|
r.Logger.WithError(err).Error("Failed to move file.")
|
|
return &util.JSONResponse{
|
|
Code: http.StatusBadRequest,
|
|
JSON: jsonerror.Unknown("Failed to upload"),
|
|
}
|
|
}
|
|
if duplicate {
|
|
r.Logger.WithField("dst", finalPath).Info("File was stored previously - discarding duplicate")
|
|
}
|
|
|
|
if err = db.StoreMediaMetadata(ctx, r.MediaMetadata); err != nil {
|
|
r.Logger.WithError(err).Warn("Failed to store metadata")
|
|
// If the file is a duplicate (has the same hash as an existing file) then
|
|
// there is valid metadata in the database for that file. As such we only
|
|
// remove the file if it is not a duplicate.
|
|
if !duplicate {
|
|
fileutils.RemoveDir(types.Path(path.Dir(string(finalPath))), r.Logger)
|
|
}
|
|
return &util.JSONResponse{
|
|
Code: http.StatusBadRequest,
|
|
JSON: jsonerror.Unknown("Failed to upload"),
|
|
}
|
|
}
|
|
|
|
go func() {
|
|
busy, err := thumbnailer.GenerateThumbnails(
|
|
context.Background(), finalPath, thumbnailSizes, r.MediaMetadata,
|
|
activeThumbnailGeneration, maxThumbnailGenerators, db, r.Logger,
|
|
)
|
|
if err != nil {
|
|
r.Logger.WithError(err).Warn("Error generating thumbnails")
|
|
}
|
|
if busy {
|
|
r.Logger.Warn("Maximum number of active thumbnail generators reached. Skipping pre-generation.")
|
|
}
|
|
}()
|
|
|
|
return nil
|
|
}
|