mirror of
https://github.com/matrix-org/dendrite
synced 2024-12-14 15:22:50 +00:00
96 lines
3 KiB
Go
96 lines
3 KiB
Go
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// Copyright 2017 Vector Creations Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package writers
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import (
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"encoding/json"
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"net/http"
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log "github.com/Sirupsen/logrus"
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"github.com/matrix-org/dendrite/clientapi/jsonerror"
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"github.com/matrix-org/dendrite/mediaapi/config"
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"github.com/matrix-org/dendrite/mediaapi/types"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/matrix-org/util"
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)
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// downloadRequest metadata included in or derivable from an download request
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// https://matrix.org/docs/spec/client_server/r0.2.0.html#get-matrix-media-r0-download-servername-mediaid
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type downloadRequest struct {
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MediaMetadata *types.MediaMetadata
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Logger *log.Entry
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}
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// Download implements /download
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func Download(w http.ResponseWriter, req *http.Request, origin gomatrixserverlib.ServerName, mediaID types.MediaID, cfg *config.MediaAPI, activeRemoteRequests *types.ActiveRemoteRequests) {
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r := &downloadRequest{
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MediaMetadata: &types.MediaMetadata{
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MediaID: mediaID,
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Origin: origin,
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},
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Logger: util.GetLogger(req.Context()),
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}
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// request validation
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if req.Method != "GET" {
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r.jsonErrorResponse(w, util.JSONResponse{
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Code: 405,
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JSON: jsonerror.Unknown("request method must be GET"),
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})
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return
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}
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if resErr := r.Validate(); resErr != nil {
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r.jsonErrorResponse(w, *resErr)
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return
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}
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// doDownload
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}
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func (r *downloadRequest) jsonErrorResponse(w http.ResponseWriter, res util.JSONResponse) {
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// Marshal JSON response into raw bytes to send as the HTTP body
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resBytes, err := json.Marshal(res.JSON)
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if err != nil {
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r.Logger.WithError(err).Error("Failed to marshal JSONResponse")
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// this should never fail to be marshalled so drop err to the floor
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res = util.MessageResponse(500, "Internal Server Error")
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resBytes, _ = json.Marshal(res.JSON)
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}
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// Set status code and write the body
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w.WriteHeader(res.Code)
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r.Logger.WithField("code", res.Code).Infof("Responding (%d bytes)", len(resBytes))
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w.Write(resBytes)
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}
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// Validate validates the downloadRequest fields
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func (r *downloadRequest) Validate() *util.JSONResponse {
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// maybe give the URL pattern in the routing, these are not even possible as the handler would not be hit...?
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if r.MediaMetadata.MediaID == "" {
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return &util.JSONResponse{
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Code: 404,
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JSON: jsonerror.NotFound("mediaId must be a non-empty string"),
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}
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}
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if r.MediaMetadata.Origin == "" {
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return &util.JSONResponse{
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Code: 404,
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JSON: jsonerror.NotFound("serverName must be a non-empty string"),
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}
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}
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return nil
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}
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