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// 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 (
"encoding/json"
"net/http"
"strings"
"github.com/gorilla/mux"
"github.com/matrix-org/dendrite/internal/httputil"
"github.com/matrix-org/dendrite/mediaapi/storage"
"github.com/matrix-org/dendrite/mediaapi/types"
"github.com/matrix-org/dendrite/setup/config"
userapi "github.com/matrix-org/dendrite/userapi/api"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
// configResponse is the response to GET /_matrix/media/r0/config
// https://matrix.org/docs/spec/client_server/latest#get-matrix-media-r0-config
type configResponse struct {
UploadSize *config.FileSizeBytes `json:"m.upload.size"`
}
// Setup registers the media API HTTP handlers
//
// Due to Setup being used to call many other functions, a gocyclo nolint is
// applied:
// nolint: gocyclo
func Setup(
publicAPIMux *mux.Router,
cfg *config.MediaAPI,
rateLimit *config.RateLimiting,
db storage.Database,
userAPI userapi.UserInternalAPI,
client *gomatrixserverlib.Client,
) {
rateLimits := httputil.NewRateLimits(rateLimit)
v3mux := publicAPIMux.PathPrefix("/{apiversion:(?:r0|v1|v3)}/").Subrouter()
activeThumbnailGeneration := &types.ActiveThumbnailGeneration{
PathToResult: map[string]*types.ThumbnailGenerationResult{},
}
uploadHandler := httputil.MakeAuthAPI(
"upload", userAPI,
func(req *http.Request, dev *userapi.Device) util.JSONResponse {
if r := rateLimits.Limit(req); r != nil {
return *r
}
return Upload(req, cfg, dev, db, activeThumbnailGeneration)
},
)
configHandler := httputil.MakeAuthAPI("config", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse {
if r := rateLimits.Limit(req); r != nil {
return *r
}
respondSize := &cfg.MaxFileSizeBytes
if cfg.MaxFileSizeBytes == 0 {
respondSize = nil
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: configResponse{UploadSize: respondSize},
}
})
v3mux.Handle("/upload", uploadHandler).Methods(http.MethodPost, http.MethodOptions)
v3mux.Handle("/config", configHandler).Methods(http.MethodGet, http.MethodOptions)
activeRemoteRequests := &types.ActiveRemoteRequests{
MXCToResult: map[string]*types.RemoteRequestResult{},
}
downloadHandler := makeDownloadAPI("download", cfg, rateLimits, db, client, activeRemoteRequests, activeThumbnailGeneration)
v3mux.Handle("/download/{serverName}/{mediaId}", downloadHandler).Methods(http.MethodGet, http.MethodOptions)
v3mux.Handle("/download/{serverName}/{mediaId}/{downloadName}", downloadHandler).Methods(http.MethodGet, http.MethodOptions)
v3mux.Handle("/thumbnail/{serverName}/{mediaId}",
makeDownloadAPI("thumbnail", cfg, rateLimits, db, client, activeRemoteRequests, activeThumbnailGeneration),
).Methods(http.MethodGet, http.MethodOptions)
}
func makeDownloadAPI(
name string,
cfg *config.MediaAPI,
rateLimits *httputil.RateLimits,
db storage.Database,
client *gomatrixserverlib.Client,
activeRemoteRequests *types.ActiveRemoteRequests,
activeThumbnailGeneration *types.ActiveThumbnailGeneration,
) http.HandlerFunc {
counterVec := promauto.NewCounterVec(
prometheus.CounterOpts{
Name: name,
Help: "Total number of media_api requests for either thumbnails or full downloads",
},
[]string{"code"},
)
httpHandler := func(w http.ResponseWriter, req *http.Request) {
req = util.RequestWithLogging(req)
// Set internal headers returned regardless of the outcome of the request
util.SetCORSHeaders(w)
// Content-Type will be overridden in case of returning file data, else we respond with JSON-formatted errors
w.Header().Set("Content-Type", "application/json")
// Ratelimit requests
// NOTSPEC: The spec says everything at /media/ should be rate limited, but this causes issues with thumbnails (#2243)
if name != "thumbnail" {
if r := rateLimits.Limit(req); r != nil {
if err := json.NewEncoder(w).Encode(r); err != nil {
w.WriteHeader(http.StatusInternalServerError)
return
}
w.WriteHeader(http.StatusTooManyRequests)
return
}
}
vars, _ := httputil.URLDecodeMapValues(mux.Vars(req))
serverName := gomatrixserverlib.ServerName(vars["serverName"])
// For the purposes of loop avoidance, we will return a 404 if allow_remote is set to
// false in the query string and the target server name isn't our own.
// https://github.com/matrix-org/matrix-doc/pull/1265
if allowRemote := req.URL.Query().Get("allow_remote"); strings.ToLower(allowRemote) == "false" {
if serverName != cfg.Matrix.ServerName {
w.WriteHeader(http.StatusNotFound)
return
}
}
Download(
w,
req,
serverName,
types.MediaID(vars["mediaId"]),
cfg,
db,
client,
activeRemoteRequests,
activeThumbnailGeneration,
name == "thumbnail",
vars["downloadName"],
)
}
return promhttp.InstrumentHandlerCounter(counterVec, http.HandlerFunc(httpHandler))
}
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