mirror of
https://github.com/1f349/dendrite.git
synced 2024-11-08 18:16:59 +00:00
mediaapi/writers/download: Add local download support
This commit is contained in:
Robert Swain
parent
3f7ef7690b
commit
a936ad5063
@ -54,7 +54,7 @@ func Setup(servMux *http.ServeMux, httpClient *http.Client, cfg *config.MediaAPI
|
||||
w.Header().Set("Content-Type", "application/json")
|
||||
|
||||
vars := mux.Vars(req)
|
||||
writers.Download(w, req, gomatrixserverlib.ServerName(vars["serverName"]), types.MediaID(vars["mediaId"]), cfg, activeRemoteRequests)
|
||||
writers.Download(w, req, gomatrixserverlib.ServerName(vars["serverName"]), types.MediaID(vars["mediaId"]), cfg, db, activeRemoteRequests)
|
||||
})),
|
||||
)
|
||||
|
||||
|
||||
@ -15,14 +15,20 @@
|
||||
package writers
|
||||
|
||||
import (
|
||||
"database/sql"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"io"
|
||||
"net/http"
|
||||
"os"
|
||||
"regexp"
|
||||
"strconv"
|
||||
|
||||
log "github.com/Sirupsen/logrus"
|
||||
"github.com/matrix-org/dendrite/clientapi/jsonerror"
|
||||
"github.com/matrix-org/dendrite/mediaapi/config"
|
||||
"github.com/matrix-org/dendrite/mediaapi/fileutils"
|
||||
"github.com/matrix-org/dendrite/mediaapi/storage"
|
||||
"github.com/matrix-org/dendrite/mediaapi/types"
|
||||
"github.com/matrix-org/gomatrixserverlib"
|
||||
"github.com/matrix-org/util"
|
||||
@ -33,6 +39,13 @@ const mediaIDCharacters = "A-Za-z0-9_=-"
|
||||
// Note: unfortunately regex.MustCompile() cannot be assigned to a const
|
||||
var mediaIDRegex = regexp.MustCompile("[" + mediaIDCharacters + "]+")
|
||||
|
||||
// Error types used by downloadRequest.getMediaMetadata
|
||||
// FIXME: make into types
|
||||
var (
|
||||
errDBQuery = fmt.Errorf("error querying database for media")
|
||||
errDBNotFound = fmt.Errorf("media not found")
|
||||
)
|
||||
|
||||
// downloadRequest metadata included in or derivable from an download request
|
||||
// https://matrix.org/docs/spec/client_server/r0.2.0.html#get-matrix-media-r0-download-servername-mediaid
|
||||
type downloadRequest struct {
|
||||
@ -41,7 +54,8 @@ type downloadRequest struct {
|
||||
}
|
||||
|
||||
// Download implements /download
|
||||
func Download(w http.ResponseWriter, req *http.Request, origin gomatrixserverlib.ServerName, mediaID types.MediaID, cfg *config.MediaAPI, activeRemoteRequests *types.ActiveRemoteRequests) {
|
||||
// Files from this server (i.e. origin == cfg.ServerName) are served directly
|
||||
func Download(w http.ResponseWriter, req *http.Request, origin gomatrixserverlib.ServerName, mediaID types.MediaID, cfg *config.MediaAPI, db *storage.Database, activeRemoteRequests *types.ActiveRemoteRequests) {
|
||||
r := &downloadRequest{
|
||||
MediaMetadata: &types.MediaMetadata{
|
||||
MediaID: mediaID,
|
||||
@ -64,7 +78,10 @@ func Download(w http.ResponseWriter, req *http.Request, origin gomatrixserverlib
|
||||
return
|
||||
}
|
||||
|
||||
// doDownload
|
||||
if resErr := r.doDownload(w, cfg, db, activeRemoteRequests); resErr != nil {
|
||||
r.jsonErrorResponse(w, *resErr)
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
func (r *downloadRequest) jsonErrorResponse(w http.ResponseWriter, res util.JSONResponse) {
|
||||
@ -101,3 +118,152 @@ func (r *downloadRequest) Validate() *util.JSONResponse {
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (r *downloadRequest) doDownload(w http.ResponseWriter, cfg *config.MediaAPI, db *storage.Database, activeRemoteRequests *types.ActiveRemoteRequests) *util.JSONResponse {
|
||||
// check if we have a record of the media in our database
|
||||
mediaMetadata, err := r.getMediaMetadata(db)
|
||||
if err == nil {
|
||||
// If we have a record, we can respond from the local file
|
||||
r.MediaMetadata = mediaMetadata
|
||||
return r.respondFromLocalFile(w, cfg.AbsBasePath)
|
||||
} else if err == errDBNotFound {
|
||||
if r.MediaMetadata.Origin == cfg.ServerName {
|
||||
// If we do not have a record and the origin is local, the file is not found
|
||||
r.Logger.WithError(err).Warn("Failed to look up file in database")
|
||||
return &util.JSONResponse{
|
||||
Code: 404,
|
||||
JSON: jsonerror.NotFound(fmt.Sprintf("File with media ID %q does not exist", r.MediaMetadata.MediaID)),
|
||||
}
|
||||
}
|
||||
// TODO: If we do not have a record and the origin is remote, we need to fetch it and respond with that file
|
||||
return &util.JSONResponse{
|
||||
Code: 404,
|
||||
JSON: jsonerror.NotFound(fmt.Sprintf("File with media ID %q does not exist", r.MediaMetadata.MediaID)),
|
||||
}
|
||||
}
|
||||
// Another error from the database
|
||||
r.Logger.WithError(err).WithFields(log.Fields{
|
||||
"MediaID": r.MediaMetadata.MediaID,
|
||||
"Origin": r.MediaMetadata.Origin,
|
||||
}).Error("Error querying the database.")
|
||||
return &util.JSONResponse{
|
||||
Code: 500,
|
||||
JSON: jsonerror.InternalServerError(),
|
||||
}
|
||||
}
|
||||
|
||||
// getMediaMetadata queries the database for media metadata
|
||||
func (r *downloadRequest) getMediaMetadata(db *storage.Database) (*types.MediaMetadata, error) {
|
||||
mediaMetadata, err := db.GetMediaMetadata(r.MediaMetadata.MediaID, r.MediaMetadata.Origin)
|
||||
if err != nil {
|
||||
if err == sql.ErrNoRows {
|
||||
r.Logger.WithFields(log.Fields{
|
||||
"Origin": r.MediaMetadata.Origin,
|
||||
"MediaID": r.MediaMetadata.MediaID,
|
||||
}).Info("Media not found in database.")
|
||||
return nil, errDBNotFound
|
||||
}
|
||||
r.Logger.WithError(err).WithFields(log.Fields{
|
||||
"Origin": r.MediaMetadata.Origin,
|
||||
"MediaID": r.MediaMetadata.MediaID,
|
||||
}).Error("Error querying database for media.")
|
||||
return nil, errDBQuery
|
||||
}
|
||||
return mediaMetadata, nil
|
||||
}
|
||||
|
||||
// respondFromLocalFile reads a file from local storage and writes it to the http.ResponseWriter
|
||||
// Returns a util.JSONResponse error in case of error
|
||||
func (r *downloadRequest) respondFromLocalFile(w http.ResponseWriter, absBasePath types.Path) *util.JSONResponse {
|
||||
filePath, err := fileutils.GetPathFromBase64Hash(r.MediaMetadata.Base64Hash, absBasePath)
|
||||
if err != nil {
|
||||
// FIXME: Remove erroneous file from database?
|
||||
r.Logger.WithError(err).Warn("Failed to get file path from metadata")
|
||||
return &util.JSONResponse{
|
||||
Code: 404,
|
||||
JSON: jsonerror.NotFound(fmt.Sprintf("File with media ID %q does not exist", r.MediaMetadata.MediaID)),
|
||||
}
|
||||
}
|
||||
file, err := os.Open(filePath)
|
||||
defer file.Close()
|
||||
if err != nil {
|
||||
// FIXME: Remove erroneous file from database?
|
||||
r.Logger.WithError(err).Warn("Failed to open file")
|
||||
return &util.JSONResponse{
|
||||
Code: 404,
|
||||
JSON: jsonerror.NotFound(fmt.Sprintf("File with media ID %q does not exist", r.MediaMetadata.MediaID)),
|
||||
}
|
||||
}
|
||||
stat, err := file.Stat()
|
||||
if err != nil {
|
||||
// FIXME: Remove erroneous file from database?
|
||||
r.Logger.WithError(err).Warn("Failed to stat file")
|
||||
return &util.JSONResponse{
|
||||
Code: 404,
|
||||
JSON: jsonerror.NotFound(fmt.Sprintf("File with media ID %q does not exist", r.MediaMetadata.MediaID)),
|
||||
}
|
||||
}
|
||||
|
||||
if r.MediaMetadata.FileSizeBytes > 0 && int64(r.MediaMetadata.FileSizeBytes) != stat.Size() {
|
||||
r.Logger.WithFields(log.Fields{
|
||||
"fileSizeDatabase": r.MediaMetadata.FileSizeBytes,
|
||||
"fileSizeDisk": stat.Size(),
|
||||
}).Warn("File size in database and on-disk differ.")
|
||||
// FIXME: Remove erroneous file from database?
|
||||
}
|
||||
|
||||
r.Logger.WithFields(log.Fields{
|
||||
"MediaID": r.MediaMetadata.MediaID,
|
||||
"Origin": r.MediaMetadata.Origin,
|
||||
"UploadName": r.MediaMetadata.UploadName,
|
||||
"Base64Hash": r.MediaMetadata.Base64Hash,
|
||||
"FileSizeBytes": r.MediaMetadata.FileSizeBytes,
|
||||
"Content-Type": r.MediaMetadata.ContentType,
|
||||
}).Info("Responding with file")
|
||||
|
||||
w.Header().Set("Content-Type", string(r.MediaMetadata.ContentType))
|
||||
w.Header().Set("Content-Length", strconv.FormatInt(int64(r.MediaMetadata.FileSizeBytes), 10))
|
||||
contentSecurityPolicy := "default-src 'none';" +
|
||||
" script-src 'none';" +
|
||||
" plugin-types application/pdf;" +
|
||||
" style-src 'unsafe-inline';" +
|
||||
" object-src 'self';"
|
||||
w.Header().Set("Content-Security-Policy", contentSecurityPolicy)
|
||||
|
||||
if bytesResponded, err := io.Copy(w, file); err != nil {
|
||||
r.Logger.WithError(err).Warn("Failed to copy from cache")
|
||||
if bytesResponded == 0 {
|
||||
return &util.JSONResponse{
|
||||
Code: 500,
|
||||
JSON: jsonerror.NotFound(fmt.Sprintf("Failed to respond with file with media ID %q", r.MediaMetadata.MediaID)),
|
||||
}
|
||||
}
|
||||
// If we have written any data then we have already responded with 200 OK and all we can do is close the connection
|
||||
// FIXME: close the connection here or just return?
|
||||
r.closeConnection(w)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (r *downloadRequest) closeConnection(w http.ResponseWriter) {
|
||||
r.Logger.WithFields(log.Fields{
|
||||
"Origin": r.MediaMetadata.Origin,
|
||||
"MediaID": r.MediaMetadata.MediaID,
|
||||
}).Info("Attempting to close the connection.")
|
||||
hijacker, ok := w.(http.Hijacker)
|
||||
if ok {
|
||||
connection, _, hijackErr := hijacker.Hijack()
|
||||
if hijackErr == nil {
|
||||
r.Logger.WithFields(log.Fields{
|
||||
"Origin": r.MediaMetadata.Origin,
|
||||
"MediaID": r.MediaMetadata.MediaID,
|
||||
}).Info("Closing")
|
||||
connection.Close()
|
||||
} else {
|
||||
r.Logger.WithError(hijackErr).WithFields(log.Fields{
|
||||
"Origin": r.MediaMetadata.Origin,
|
||||
"MediaID": r.MediaMetadata.MediaID,
|
||||
}).Warn("Error trying to hijack and close connection")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user