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nix-packages/matrix/matrix-media-repo/async-media.patch

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diff --git a/api/r0/download.go b/api/r0/download.go
index d84c74e..e431385 100644
--- a/api/r0/download.go
+++ b/api/r0/download.go
@@ -48,6 +48,21 @@ func DownloadMedia(r *http.Request, rctx rcontext.RequestContext, user api.UserI
downloadRemote = parsedFlag
}
+ var asyncWaitMs *int = nil
+ if rctx.Config.Features.MSC2246Async.Enabled {
+ // request default wait time if feature enabled
+ var parsedInt int = -1
+ maxStallMs := r.URL.Query().Get("fi.mau.msc2246.max_stall_ms")
+ if maxStallMs != "" {
+ var err error
+ parsedInt, err = strconv.Atoi(maxStallMs)
+ if err != nil {
+ return api.InternalServerError("fi.mau.msc2246.max_stall_ms does not appear to be a number")
+ }
+ }
+ asyncWaitMs = &parsedInt
+ }
+
rctx = rctx.LogWithFields(logrus.Fields{
"mediaId": mediaId,
"server": server,
@@ -55,7 +70,7 @@ func DownloadMedia(r *http.Request, rctx rcontext.RequestContext, user api.UserI
"allowRemote": downloadRemote,
})
- streamedMedia, err := download_controller.GetMedia(server, mediaId, downloadRemote, false, rctx)
+ streamedMedia, err := download_controller.GetMedia(server, mediaId, downloadRemote, false, asyncWaitMs, rctx)
if err != nil {
if err == common.ErrMediaNotFound {
return api.NotFoundError()
@@ -63,6 +78,8 @@ func DownloadMedia(r *http.Request, rctx rcontext.RequestContext, user api.UserI
return api.RequestTooLarge()
} else if err == common.ErrMediaQuarantined {
return api.NotFoundError() // We lie for security
+ } else if err == common.ErrNotYetUploaded {
+ return api.NotYetUploaded()
}
rctx.Log.Error("Unexpected error locating media: " + err.Error())
sentry.CaptureException(err)
diff --git a/api/r0/thumbnail.go b/api/r0/thumbnail.go
index b1b73f0..8392596 100644
--- a/api/r0/thumbnail.go
+++ b/api/r0/thumbnail.go
@@ -29,6 +29,21 @@ func ThumbnailMedia(r *http.Request, rctx rcontext.RequestContext, user api.User
downloadRemote = parsedFlag
}
+ var asyncWaitMs *int = nil
+ if rctx.Config.Features.MSC2246Async.Enabled {
+ // request default wait time if feature enabled
+ var parsedInt int = -1
+ maxStallMs := r.URL.Query().Get("fi.mau.msc2246.max_stall_ms")
+ if maxStallMs != "" {
+ var err error
+ parsedInt, err = strconv.Atoi(maxStallMs)
+ if err != nil {
+ return api.InternalServerError("fi.mau.msc2246.max_stall_ms does not appear to be a number")
+ }
+ }
+ asyncWaitMs = &parsedInt
+ }
+
rctx = rctx.LogWithFields(logrus.Fields{
"mediaId": mediaId,
"server": server,
@@ -87,12 +102,14 @@ func ThumbnailMedia(r *http.Request, rctx rcontext.RequestContext, user api.User
return api.BadRequest("Width and height must be greater than zero")
}
- streamedThumbnail, err := thumbnail_controller.GetThumbnail(server, mediaId, width, height, animated, method, downloadRemote, rctx)
+ streamedThumbnail, err := thumbnail_controller.GetThumbnail(server, mediaId, width, height, animated, method, downloadRemote, asyncWaitMs, rctx)
if err != nil {
if err == common.ErrMediaNotFound {
return api.NotFoundError()
} else if err == common.ErrMediaTooLarge {
return api.RequestTooLarge()
+ } else if err == common.ErrNotYetUploaded {
+ return api.NotYetUploaded()
}
rctx.Log.Error("Unexpected error locating media: " + err.Error())
sentry.CaptureException(err)
diff --git a/api/r0/upload.go b/api/r0/upload.go
index 63b0170..b47ae99 100644
--- a/api/r0/upload.go
+++ b/api/r0/upload.go
@@ -6,7 +6,9 @@ import (
"io/ioutil"
"net/http"
"path/filepath"
+ "time"
+ "github.com/gorilla/mux"
"github.com/sirupsen/logrus"
"github.com/turt2live/matrix-media-repo/api"
"github.com/turt2live/matrix-media-repo/common"
@@ -14,6 +16,7 @@ import (
"github.com/turt2live/matrix-media-repo/controllers/info_controller"
"github.com/turt2live/matrix-media-repo/controllers/upload_controller"
"github.com/turt2live/matrix-media-repo/quota"
+ "github.com/turt2live/matrix-media-repo/util"
"github.com/turt2live/matrix-media-repo/util/cleanup"
)
@@ -22,14 +25,52 @@ type MediaUploadedResponse struct {
Blurhash string `json:"xyz.amorgan.blurhash,omitempty"`
}
+type MediaCreatedResponse struct {
+ ContentUri string `json:"content_uri"`
+ UnusedExpiresAt int64 `json:"unused_expires_at"`
+}
+
+func CreateMedia(r *http.Request, rctx rcontext.RequestContext, user api.UserInfo) interface{} {
+ media, _, err := upload_controller.CreateMedia(r.Host, rctx)
+ if err != nil {
+ rctx.Log.Error("Unexpected error creating media reference: " + err.Error())
+ return api.InternalServerError("Unexpected Error")
+ }
+
+ if err = upload_controller.PersistMedia(media, user.UserId, rctx); err != nil {
+ rctx.Log.Error("Unexpected error persisting media reference: " + err.Error())
+ return api.InternalServerError("Unexpected Error")
+ }
+
+ return &MediaCreatedResponse{
+ ContentUri: media.MxcUri(),
+ UnusedExpiresAt: time.Now().Unix() + int64(rctx.Config.Features.MSC2246Async.AsyncUploadExpirySecs),
+ }
+}
+
func UploadMedia(r *http.Request, rctx rcontext.RequestContext, user api.UserInfo) interface{} {
+ var server = ""
+ var mediaId = ""
+
filename := filepath.Base(r.URL.Query().Get("filename"))
defer cleanup.DumpAndCloseStream(r.Body)
+ if rctx.Config.Features.MSC2246Async.Enabled {
+ params := mux.Vars(r)
+ server = params["server"]
+ mediaId = params["mediaId"]
+ }
+
rctx = rctx.LogWithFields(logrus.Fields{
+ "server": server,
+ "mediaId": mediaId,
"filename": filename,
})
+ if server != "" && (!util.IsServerOurs(server) || server != r.Host) {
+ return api.NotFoundError()
+ }
+
contentType := r.Header.Get("Content-Type")
if contentType == "" {
contentType = "application/octet-stream" // binary
@@ -59,12 +100,16 @@ func UploadMedia(r *http.Request, rctx rcontext.RequestContext, user api.UserInf
contentLength := upload_controller.EstimateContentLength(r.ContentLength, r.Header.Get("Content-Length"))
- media, err := upload_controller.UploadMedia(r.Body, contentLength, contentType, filename, user.UserId, r.Host, rctx)
+ media, err := upload_controller.UploadMedia(r.Body, contentLength, contentType, filename, user.UserId, r.Host, mediaId, rctx)
if err != nil {
io.Copy(ioutil.Discard, r.Body) // Ditch the entire request
if err == common.ErrMediaQuarantined {
return api.BadRequest("This file is not permitted on this server")
+ } else if err == common.ErrCannotOverwriteMedia {
+ return api.CannotOverwriteMedia()
+ } else if err == common.ErrMediaNotFound {
+ return api.NotFoundError()
}
rctx.Log.Error("Unexpected error storing media: " + err.Error())
diff --git a/api/responses.go b/api/responses.go
index 93d2c39..6fd8f23 100644
--- a/api/responses.go
+++ b/api/responses.go
@@ -57,3 +57,11 @@ func BadRequest(message string) *ErrorResponse {
func QuotaExceeded() *ErrorResponse {
return &ErrorResponse{common.ErrCodeForbidden, "Quota Exceeded", common.ErrCodeQuotaExceeded}
}
+
+func CannotOverwriteMedia() *ErrorResponse {
+ return &ErrorResponse{common.ErrCodeCannotOverwriteMedia, "Cannot overwrite media", common.ErrCodeCannotOverwriteMedia}
+}
+
+func NotYetUploaded() *ErrorResponse {
+ return &ErrorResponse{common.ErrCodeNotYetUploaded, "Media not yet uploaded", common.ErrCodeNotYetUploaded}
+}
diff --git a/api/unstable/info.go b/api/unstable/info.go
index 448e018..b04ff1e 100644
--- a/api/unstable/info.go
+++ b/api/unstable/info.go
@@ -69,7 +69,7 @@ func MediaInfo(r *http.Request, rctx rcontext.RequestContext, user api.UserInfo)
"allowRemote": downloadRemote,
})
- streamedMedia, err := download_controller.GetMedia(server, mediaId, downloadRemote, true, rctx)
+ streamedMedia, err := download_controller.GetMedia(server, mediaId, downloadRemote, true, nil, rctx)
if err != nil {
if err == common.ErrMediaNotFound {
return api.NotFoundError()
diff --git a/api/unstable/local_copy.go b/api/unstable/local_copy.go
index 30d5f26..885633b 100644
--- a/api/unstable/local_copy.go
+++ b/api/unstable/local_copy.go
@@ -40,7 +40,7 @@ func LocalCopy(r *http.Request, rctx rcontext.RequestContext, user api.UserInfo)
// TODO: There's a lot of room for improvement here. Instead of re-uploading media, we should just update the DB.
- streamedMedia, err := download_controller.GetMedia(server, mediaId, downloadRemote, true, rctx)
+ streamedMedia, err := download_controller.GetMedia(server, mediaId, downloadRemote, true, nil, rctx)
if err != nil {
if err == common.ErrMediaNotFound {
return api.NotFoundError()
@@ -60,7 +60,7 @@ func LocalCopy(r *http.Request, rctx rcontext.RequestContext, user api.UserInfo)
return &r0.MediaUploadedResponse{ContentUri: streamedMedia.KnownMedia.MxcUri()}
}
- newMedia, err := upload_controller.UploadMedia(streamedMedia.Stream, streamedMedia.KnownMedia.SizeBytes, streamedMedia.KnownMedia.ContentType, streamedMedia.KnownMedia.UploadName, user.UserId, r.Host, rctx)
+ newMedia, err := upload_controller.UploadMedia(streamedMedia.Stream, streamedMedia.KnownMedia.SizeBytes, streamedMedia.KnownMedia.ContentType, streamedMedia.KnownMedia.UploadName, user.UserId, r.Host, "", rctx)
if err != nil {
rctx.Log.Error("Unexpected error storing media: " + err.Error())
sentry.CaptureException(err)
diff --git a/api/webserver/route_handler.go b/api/webserver/route_handler.go
index 3d04714..a120d7a 100644
--- a/api/webserver/route_handler.go
+++ b/api/webserver/route_handler.go
@@ -146,7 +146,7 @@ func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
case common.ErrCodeUnknownToken:
statusCode = http.StatusUnauthorized
break
- case common.ErrCodeNotFound:
+ case common.ErrCodeNotYetUploaded, common.ErrCodeNotFound:
statusCode = http.StatusNotFound
break
case common.ErrCodeMediaTooLarge:
@@ -161,6 +161,9 @@ func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
case common.ErrCodeForbidden:
statusCode = http.StatusForbidden
break
+ case common.ErrCodeCannotOverwriteMedia:
+ statusCode = http.StatusConflict
+ break
default: // Treat as unknown (a generic server error)
statusCode = http.StatusInternalServerError
break
diff --git a/api/webserver/webserver.go b/api/webserver/webserver.go
index fb9c7dd..583d270 100644
--- a/api/webserver/webserver.go
+++ b/api/webserver/webserver.go
@@ -44,6 +44,7 @@ func Init() *sync.WaitGroup {
counter := &requestCounter{}
optionsHandler := handler{api.EmptyResponseHandler, "options_request", counter, false}
+ createHandler := handler{api.AccessTokenRequiredRoute(r0.CreateMedia), "create", counter, false}
uploadHandler := handler{api.AccessTokenRequiredRoute(r0.UploadMedia), "upload", counter, false}
downloadHandler := handler{api.AccessTokenOptionalRoute(r0.DownloadMedia), "download", counter, false}
thumbnailHandler := handler{api.AccessTokenOptionalRoute(r0.ThumbnailMedia), "thumbnail", counter, false}
@@ -160,6 +161,12 @@ func Init() *sync.WaitGroup {
}
}
+ if config.Get().Features.MSC2246Async.Enabled {
+ logrus.Info("Asynchronous uploads (MSC2246) enabled")
+ routes = append(routes, definedRoute{"/_matrix/media/unstable/fi.mau.msc2246/create", route{"POST", createHandler}})
+ routes = append(routes, definedRoute{"/_matrix/media/unstable/fi.mau.msc2246/upload/{server:[a-zA-Z0-9.:\\-_]+}/{mediaId:[^/]+}", route{"PUT", uploadHandler}})
+ }
+
if config.Get().Features.IPFS.Enabled {
routes = append(routes, definedRoute{features.IPFSDownloadRoute, route{"GET", ipfsDownloadHandler}})
routes = append(routes, definedRoute{features.IPFSLiveDownloadRouteR0, route{"GET", ipfsDownloadHandler}})
diff --git a/common/config/conf_min_shared.go b/common/config/conf_min_shared.go
index e43dffc..ae0344a 100644
--- a/common/config/conf_min_shared.go
+++ b/common/config/conf_min_shared.go
@@ -53,6 +53,11 @@ func NewDefaultMinimumRepoConfig() MinimumRepoConfig {
YComponents: 3,
Punch: 1,
},
+ MSC2246Async: MSC2246Config{
+ Enabled: false,
+ AsyncUploadExpirySecs: 60,
+ AsyncDownloadDefaultWaitSecs: 20,
+ },
IPFS: IPFSConfig{
Enabled: false,
Daemon: IPFSDaemonConfig{
diff --git a/common/config/models_domain.go b/common/config/models_domain.go
index 3242724..c30abd9 100644
--- a/common/config/models_domain.go
+++ b/common/config/models_domain.go
@@ -88,6 +88,7 @@ type TimeoutsConfig struct {
type FeatureConfig struct {
MSC2448Blurhash MSC2448Config `yaml:"MSC2448"`
+ MSC2246Async MSC2246Config `yaml:"MSC2246"`
IPFS IPFSConfig `yaml:"IPFS"`
Redis RedisConfig `yaml:"redis"`
}
@@ -103,6 +104,12 @@ type MSC2448Config struct {
Punch int `yaml:"punch"`
}
+type MSC2246Config struct {
+ Enabled bool `yaml:"enabled"`
+ AsyncUploadExpirySecs int `yaml:"asyncUploadExpirySecs"`
+ AsyncDownloadDefaultWaitSecs int `yaml:"asyncDownloadDefaultWaitSecs"`
+}
+
type IPFSConfig struct {
Enabled bool `yaml:"enabled"`
Daemon IPFSDaemonConfig `yaml:"builtInDaemon"`
diff --git a/common/errorcodes.go b/common/errorcodes.go
index 599b32c..b9a3274 100644
--- a/common/errorcodes.go
+++ b/common/errorcodes.go
@@ -16,3 +16,5 @@ const ErrCodeRateLimitExceeded = "M_LIMIT_EXCEEDED"
const ErrCodeUnknown = "M_UNKNOWN"
const ErrCodeForbidden = "M_FORBIDDEN"
const ErrCodeQuotaExceeded = "M_QUOTA_EXCEEDED"
+const ErrCodeCannotOverwriteMedia = "FI.MAU.MSC2246_CANNOT_OVEWRITE_MEDIA"
+const ErrCodeNotYetUploaded = "FI.MAU.MSC2246_NOT_YET_UPLOADED"
diff --git a/common/errors.go b/common/errors.go
index 5fc0e69..09f5310 100644
--- a/common/errors.go
+++ b/common/errors.go
@@ -10,3 +10,5 @@ var ErrInvalidHost = errors.New("invalid host")
var ErrHostNotFound = errors.New("host not found")
var ErrHostBlacklisted = errors.New("host not allowed")
var ErrMediaQuarantined = errors.New("media quarantined")
+var ErrCannotOverwriteMedia = errors.New("cannot overwrite media")
+var ErrNotYetUploaded = errors.New("not yet uploaded")
diff --git a/config.sample.yaml b/config.sample.yaml
index fa49e74..0f506f1 100644
--- a/config.sample.yaml
+++ b/config.sample.yaml
@@ -544,6 +544,20 @@ featureSupport:
# make the effect more subtle, larger values make it stronger.
punch: 1
+ # MSC2246 - Asynchronous uploads
+ MSC2246:
+ # Whether or not this MSC is enabled for use in the media repo
+ enabled: false
+
+ # The number of seconds an asynchronous upload is valid to be started after requesting a media
+ # id. After expiring the upload endpoint will return an error for the client.
+ asyncUploadExpirySecs: 60
+
+ # The number of seconds a download request for an asynchronous upload will stall before
+ # returning an error. This affects clients that do not support async uploads by making them
+ # wait by default. Setting to zero will disable this behavior unless the client requests it.
+ asyncDownloadDefaultWaitSecs: 20
+
# IPFS Support
# This is currently experimental and might not work at all.
IPFS:
diff --git a/controllers/download_controller/download_controller.go b/controllers/download_controller/download_controller.go
index 4d7f354..e3d6c92 100644
--- a/controllers/download_controller/download_controller.go
+++ b/controllers/download_controller/download_controller.go
@@ -26,14 +26,14 @@ import (
var localCache = cache.New(30*time.Second, 60*time.Second)
-func GetMedia(origin string, mediaId string, downloadRemote bool, blockForMedia bool, ctx rcontext.RequestContext) (*types.MinimalMedia, error) {
+func GetMedia(origin string, mediaId string, downloadRemote bool, blockForMedia bool, asyncWaitMs *int, ctx rcontext.RequestContext) (*types.MinimalMedia, error) {
cacheKey := fmt.Sprintf("%s/%s?r=%t&b=%t", origin, mediaId, downloadRemote, blockForMedia)
v, _, err := globals.DefaultRequestGroup.Do(cacheKey, func() (interface{}, error) {
var media *types.Media
var minMedia *types.MinimalMedia
var err error
if blockForMedia {
- media, err = FindMediaRecord(origin, mediaId, downloadRemote, ctx)
+ media, err = FindMediaRecord(origin, mediaId, downloadRemote, asyncWaitMs, ctx)
if media != nil {
minMedia = &types.MinimalMedia{
Origin: media.Origin,
@@ -46,7 +46,7 @@ func GetMedia(origin string, mediaId string, downloadRemote bool, blockForMedia
}
}
} else {
- minMedia, err = FindMinimalMediaRecord(origin, mediaId, downloadRemote, ctx)
+ minMedia, err = FindMinimalMediaRecord(origin, mediaId, downloadRemote, asyncWaitMs, ctx)
if minMedia != nil {
media = minMedia.KnownMedia
}
@@ -159,7 +159,54 @@ func GetMedia(origin string, mediaId string, downloadRemote bool, blockForMedia
return value, err
}
-func FindMinimalMediaRecord(origin string, mediaId string, downloadRemote bool, ctx rcontext.RequestContext) (*types.MinimalMedia, error) {
+func waitForUpload(media *types.Media, asyncWaitMs *int, ctx rcontext.RequestContext) (*types.Media, error) {
+ if media == nil {
+ return nil, errors.New("waited for nil media")
+ }
+
+ if util.IsServerOurs(media.Origin) && media.SizeBytes == 0 {
+ // we're not allowed to wait by requester
+ if asyncWaitMs == nil {
+ return nil, common.ErrMediaNotFound
+ }
+
+ waitMs := *asyncWaitMs
+
+ // max wait one minute
+ if waitMs > 60_000 {
+ waitMs = 60_000
+ }
+
+ // use default wait if negative
+ if waitMs < 0 {
+ waitMs = ctx.Config.Features.MSC2246Async.AsyncDownloadDefaultWaitSecs * 1000
+
+ // if the default is zero and client didn't request any then waiting is disabled
+ if waitMs == 0 {
+ return nil, common.ErrMediaNotFound
+ }
+ }
+
+ // if the upload did not complete in 6 hours, consider it never will
+ if util.NowMillis()-media.CreationTs > 3600*6*1000 {
+ ctx.Log.Info("Tried to download expired asynchronous upload")
+ return nil, common.ErrMediaNotFound
+ }
+
+ ctx.Log.Info("Asynchronous upload not complete, waiting")
+ if ok := util.WaitForUpload(media.Origin, media.MediaId, time.Millisecond*time.Duration(waitMs)); !ok {
+ return nil, common.ErrNotYetUploaded
+ }
+
+ // fetch the entry from database again after we're notified it should be complete
+ db := storage.GetDatabase().GetMediaStore(ctx)
+ return db.Get(media.Origin, media.MediaId)
+ }
+
+ return media, nil
+}
+
+func FindMinimalMediaRecord(origin string, mediaId string, downloadRemote bool, asyncWaitMs *int, ctx rcontext.RequestContext) (*types.MinimalMedia, error) {
db := storage.GetDatabase().GetMediaStore(ctx)
var media *types.Media
@@ -217,7 +264,10 @@ func FindMinimalMediaRecord(origin string, mediaId string, downloadRemote bool,
KnownMedia: nil, // unknown
}, nil
} else {
- media = dbMedia
+ media, err = waitForUpload(dbMedia, asyncWaitMs, ctx)
+ if err != nil {
+ return nil, err
+ }
}
}
@@ -252,7 +302,7 @@ func FindMinimalMediaRecord(origin string, mediaId string, downloadRemote bool,
}, nil
}
-func FindMediaRecord(origin string, mediaId string, downloadRemote bool, ctx rcontext.RequestContext) (*types.Media, error) {
+func FindMediaRecord(origin string, mediaId string, downloadRemote bool, asyncWaitMs *int, ctx rcontext.RequestContext) (*types.Media, error) {
cacheKey := origin + "/" + mediaId
v, _, err := globals.DefaultRequestGroup.DoWithoutPost(cacheKey, func() (interface{}, error) {
db := storage.GetDatabase().GetMediaStore(ctx)
@@ -290,7 +340,10 @@ func FindMediaRecord(origin string, mediaId string, downloadRemote bool, ctx rco
}
media = result.media
} else {
- media = dbMedia
+ media, err = waitForUpload(dbMedia, asyncWaitMs, ctx)
+ if err != nil {
+ return nil, err
+ }
}
}
diff --git a/controllers/info_controller/info_controller.go b/controllers/info_controller/info_controller.go
index 281ec60..7eee6c6 100644
--- a/controllers/info_controller/info_controller.go
+++ b/controllers/info_controller/info_controller.go
@@ -27,7 +27,7 @@ func GetOrCalculateBlurhash(media *types.Media, rctx rcontext.RequestContext) (s
}
rctx.Log.Info("Getting minimal media record to calculate blurhash")
- minMedia, err := download_controller.FindMinimalMediaRecord(media.Origin, media.MediaId, true, rctx)
+ minMedia, err := download_controller.FindMinimalMediaRecord(media.Origin, media.MediaId, true, nil, rctx)
if err != nil {
return "", err
}
diff --git a/controllers/maintenance_controller/maintainance_controller.go b/controllers/maintenance_controller/maintainance_controller.go
index 1df60a3..dfdd1f8 100644
--- a/controllers/maintenance_controller/maintainance_controller.go
+++ b/controllers/maintenance_controller/maintainance_controller.go
@@ -387,7 +387,7 @@ func PurgeDomainMedia(serverName string, beforeTs int64, ctx rcontext.RequestCon
}
func PurgeMedia(origin string, mediaId string, ctx rcontext.RequestContext) error {
- media, err := download_controller.FindMediaRecord(origin, mediaId, false, ctx)
+ media, err := download_controller.FindMediaRecord(origin, mediaId, false, nil, ctx)
if err != nil {
return err
}
diff --git a/controllers/preview_controller/preview_resource_handler.go b/controllers/preview_controller/preview_resource_handler.go
index 86c42b9..cd99dba 100644
--- a/controllers/preview_controller/preview_resource_handler.go
+++ b/controllers/preview_controller/preview_resource_handler.go
@@ -133,7 +133,7 @@ func urlPreviewWorkFn(request *resource_handler.WorkRequest) (resp *urlPreviewRe
contentLength := upload_controller.EstimateContentLength(preview.Image.ContentLength, preview.Image.ContentLengthHeader)
// UploadMedia will close the read stream for the thumbnail and dedupe the image
- media, err := upload_controller.UploadMedia(preview.Image.Data, contentLength, preview.Image.ContentType, preview.Image.Filename, info.forUserId, info.onHost, ctx)
+ media, err := upload_controller.UploadMedia(preview.Image.Data, contentLength, preview.Image.ContentType, preview.Image.Filename, info.forUserId, info.onHost, "", ctx)
if err != nil {
ctx.Log.Warn("Non-fatal error storing preview thumbnail: " + err.Error())
sentry.CaptureException(err)
diff --git a/controllers/thumbnail_controller/thumbnail_controller.go b/controllers/thumbnail_controller/thumbnail_controller.go
index 9b5e121..c464790 100644
--- a/controllers/thumbnail_controller/thumbnail_controller.go
+++ b/controllers/thumbnail_controller/thumbnail_controller.go
@@ -26,8 +26,8 @@ import (
var localCache = cache.New(30*time.Second, 60*time.Second)
-func GetThumbnail(origin string, mediaId string, desiredWidth int, desiredHeight int, animated bool, method string, downloadRemote bool, ctx rcontext.RequestContext) (*types.StreamedThumbnail, error) {
- media, err := download_controller.FindMediaRecord(origin, mediaId, downloadRemote, ctx)
+func GetThumbnail(origin string, mediaId string, desiredWidth int, desiredHeight int, animated bool, method string, downloadRemote bool, asyncWaitMs *int, ctx rcontext.RequestContext) (*types.StreamedThumbnail, error) {
+ media, err := download_controller.FindMediaRecord(origin, mediaId, downloadRemote, asyncWaitMs, ctx)
if err != nil {
return nil, err
}
diff --git a/controllers/upload_controller/upload_controller.go b/controllers/upload_controller/upload_controller.go
index 7936faa..25759ff 100644
--- a/controllers/upload_controller/upload_controller.go
+++ b/controllers/upload_controller/upload_controller.go
@@ -1,6 +1,7 @@
package upload_controller
import (
+ "database/sql"
"fmt"
"github.com/getsentry/sentry-go"
"io"
@@ -92,39 +93,26 @@ func EstimateContentLength(contentLength int64, contentLengthHeader string) int6
return -1 // unknown
}
-func UploadMedia(contents io.ReadCloser, contentLength int64, contentType string, filename string, userId string, origin string, ctx rcontext.RequestContext) (*types.Media, error) {
- defer cleanup.DumpAndCloseStream(contents)
-
- var data io.ReadCloser
- if ctx.Config.Uploads.MaxSizeBytes > 0 {
- data = ioutil.NopCloser(io.LimitReader(contents, ctx.Config.Uploads.MaxSizeBytes))
- } else {
- data = contents
- }
-
- dataBytes, err := ioutil.ReadAll(data)
- if err != nil {
- return nil, err
- }
-
+func CreateMedia(origin string, ctx rcontext.RequestContext) (*types.Media, *datastore.DatastoreRef, error) {
metadataDb := storage.GetDatabase().GetMetadataStore(ctx)
mediaTaken := true
var mediaId string
+ var err error
attempts := 0
for mediaTaken {
attempts += 1
if attempts > 10 {
- return nil, errors.New("failed to generate a media ID after 10 rounds")
+ return nil, nil, errors.New("failed to generate a media ID after 10 rounds")
}
mediaId, err = util.GenerateRandomString(64)
if err != nil {
- return nil, err
+ return nil, nil, err
}
mediaId, err = util.GetSha1OfString(mediaId + strconv.FormatInt(util.NowMillis(), 10))
if err != nil {
- return nil, err
+ return nil, nil, err
}
// Because we use the current time in the media ID, we don't need to worry about
@@ -136,17 +124,88 @@ func UploadMedia(contents io.ReadCloser, contentLength int64, contentType string
mediaTaken, err = metadataDb.IsReserved(origin, mediaId)
if err != nil {
- return nil, err
+ return nil, nil, err
}
}
_ = recentMediaIds.Add(mediaId, true, cache.DefaultExpiration)
- var existingFile *AlreadyUploadedFile = nil
ds, err := datastore.PickDatastore(common.KindLocalMedia, ctx)
+ if err != nil {
+ return nil, nil, err
+ }
+
+ return &types.Media{MediaId: mediaId, Origin: origin, DatastoreId: ds.DatastoreId}, ds, nil
+}
+
+func PersistMedia(media *types.Media, userId string, ctx rcontext.RequestContext) error {
+ db := storage.GetDatabase().GetMediaStore(ctx)
+
+ ctx.Log.Info("Persisting async media record")
+
+ media.UserId = userId
+ media.CreationTs = util.NowMillis()
+
+ return db.Insert(media)
+}
+
+func UploadMedia(contents io.ReadCloser, contentLength int64, contentType string, filename string, userId string, origin string, asyncMediaId string, ctx rcontext.RequestContext) (*types.Media, error) {
+ defer cleanup.DumpAndCloseStream(contents)
+
+ var data io.ReadCloser
+ if ctx.Config.Uploads.MaxSizeBytes > 0 {
+ data = ioutil.NopCloser(io.LimitReader(contents, ctx.Config.Uploads.MaxSizeBytes))
+ } else {
+ data = contents
+ }
+
+ dataBytes, err := ioutil.ReadAll(data)
if err != nil {
return nil, err
}
+
+ var mediaId string
+ var ds *datastore.DatastoreRef
+ if asyncMediaId == "" {
+ media, newDs, err := CreateMedia(origin, ctx)
+ if err != nil {
+ return nil, err
+ }
+
+ mediaId = media.MediaId
+ ds = newDs
+ } else {
+ db := storage.GetDatabase().GetMediaStore(ctx)
+
+ media, err := db.Get(origin, asyncMediaId)
+ if err != nil {
+ return nil, err
+ }
+
+ if media == nil {
+ return nil, common.ErrMediaNotFound
+ }
+
+ if media.UserId != userId {
+ return nil, common.ErrMediaNotFound
+ }
+
+ if media.SizeBytes > 0 {
+ return nil, common.ErrCannotOverwriteMedia
+ }
+
+ if util.NowMillis()-media.CreationTs > int64(ctx.Config.Features.MSC2246Async.AsyncUploadExpirySecs*1000) {
+ return nil, common.ErrMediaNotFound
+ }
+
+ mediaId = asyncMediaId
+ ds, err = datastore.LocateDatastore(ctx, media.DatastoreId)
+ if err != nil {
+ return nil, err
+ }
+ }
+
+ var existingFile *AlreadyUploadedFile = nil
if ds.Type == "ipfs" {
// Do the upload now so we can pick the media ID to point to IPFS
info, err := ds.UploadFile(util_byte_seeker.NewByteSeeker(dataBytes), contentLength, ctx)
@@ -160,15 +219,22 @@ func UploadMedia(contents io.ReadCloser, contentLength int64, contentType string
mediaId = fmt.Sprintf("ipfs:%s", info.Location[len("ipfs/"):])
}
- m, err := StoreDirect(existingFile, util_byte_seeker.NewByteSeeker(dataBytes), contentLength, contentType, filename, userId, origin, mediaId, common.KindLocalMedia, ctx, true)
+ m, err := StoreDirect(existingFile, util_byte_seeker.NewByteSeeker(dataBytes), contentLength, contentType, filename, userId, origin, mediaId, common.KindLocalMedia, ctx, asyncMediaId == "")
if err != nil {
return m, err
}
if m != nil {
- err = internal_cache.Get().UploadMedia(m.Sha256Hash, util_byte_seeker.NewByteSeeker(dataBytes), ctx)
- if err != nil {
+ util.NotifyUpload(origin, mediaId)
+
+ cache := internal_cache.Get()
+ if err := cache.UploadMedia(m.Sha256Hash, util_byte_seeker.NewByteSeeker(dataBytes), ctx); err != nil {
ctx.Log.Warn("Unexpected error trying to cache media: " + err.Error())
}
+ if asyncMediaId != "" {
+ if err := cache.NotifyUpload(origin, mediaId, ctx); err != nil {
+ ctx.Log.Warn("Unexpected error trying to notify cache about media: " + err.Error())
+ }
+ }
}
return m, err
}
@@ -193,8 +259,7 @@ func checkSpam(contents []byte, filename string, contentType string, userId stri
return nil
}
-func StoreDirect(f *AlreadyUploadedFile, contents io.ReadCloser, expectedSize int64, contentType string, filename string, userId string, origin string, mediaId string, kind string, ctx rcontext.RequestContext, filterUserDuplicates bool) (*types.Media, error) {
- var err error
+func StoreDirect(f *AlreadyUploadedFile, contents io.ReadCloser, expectedSize int64, contentType string, filename string, userId string, origin string, mediaId string, kind string, ctx rcontext.RequestContext, filterUserDuplicates bool) (ret *types.Media, err error) {
var ds *datastore.DatastoreRef
var info *types.ObjectInfo
var contentBytes []byte
@@ -229,15 +294,16 @@ func StoreDirect(f *AlreadyUploadedFile, contents io.ReadCloser, expectedSize in
return nil, err
}
}
+ defer func() {
+ // always delete temp object if we return an error
+ if err != nil {
+ ds.DeleteObject(info.Location)
+ }
+ }()
db := storage.GetDatabase().GetMediaStore(ctx)
records, err := db.GetByHash(info.Sha256Hash)
if err != nil {
- err2 := ds.DeleteObject(info.Location) // delete temp object
- if err2 != nil {
- ctx.Log.Warn("Error deleting temporary upload", err2)
- sentry.CaptureException(err2)
- }
return nil, err
}
@@ -270,22 +336,12 @@ func StoreDirect(f *AlreadyUploadedFile, contents io.ReadCloser, expectedSize in
err = checkSpam(contentBytes, filename, contentType, userId, origin, mediaId)
if err != nil {
- err2 := ds.DeleteObject(info.Location) // delete temp object
- if err2 != nil {
- ctx.Log.Warn("Error deleting temporary upload", err2)
- sentry.CaptureException(err2)
- }
return nil, err
}
// We'll use the location from the first record
record := records[0]
if record.Quarantined {
- err2 := ds.DeleteObject(info.Location) // delete temp object
- if err2 != nil {
- ctx.Log.Warn("Error deleting temporary upload", err2)
- sentry.CaptureException(err2)
- }
ctx.Log.Warn("User attempted to upload quarantined content - rejecting")
return nil, common.ErrMediaQuarantined
}
@@ -304,21 +360,37 @@ func StoreDirect(f *AlreadyUploadedFile, contents io.ReadCloser, expectedSize in
}
}
- media := record
- media.Origin = origin
- media.MediaId = mediaId
- media.UserId = userId
- media.UploadName = filename
- media.ContentType = contentType
- media.CreationTs = util.NowMillis()
+ // Check if we have reserved the metadata already
+ media, err := db.Get(origin, mediaId)
+ if err == sql.ErrNoRows {
+ media = record
+ media.Origin = origin
+ media.MediaId = mediaId
+ media.UserId = userId
+ media.UploadName = filename
+ media.ContentType = contentType
+ media.CreationTs = util.NowMillis()
+
+ if err = db.Insert(media); err != nil {
+ return nil, err
+ }
+ } else if err == nil {
+ // last minute check if the file was already uploaded
+ if media.SizeBytes > 0 {
+ return nil, common.ErrCannotOverwriteMedia
+ }
- err = db.Insert(media)
- if err != nil {
- err2 := ds.DeleteObject(info.Location) // delete temp object
- if err2 != nil {
- ctx.Log.Warn("Error deleting temporary upload", err2)
- sentry.CaptureException(err2)
+ media.UploadName = filename
+ media.ContentType = contentType
+ media.Sha256Hash = info.Sha256Hash
+ media.SizeBytes = info.SizeBytes
+ media.DatastoreId = ds.DatastoreId
+ media.Location = info.Location
+
+ if err = db.Update(media); err != nil {
+ return nil, err
}
+ } else {
return nil, err
}
@@ -327,11 +399,6 @@ func StoreDirect(f *AlreadyUploadedFile, contents io.ReadCloser, expectedSize in
if media.DatastoreId != ds.DatastoreId && media.Location != info.Location {
ds2, err := datastore.LocateDatastore(ctx, media.DatastoreId)
if err != nil {
- err2 := ds.DeleteObject(info.Location) // delete temp object
- if err2 != nil {
- ctx.Log.Warn("Error deleting temporary upload", err2)
- sentry.CaptureException(err2)
- }
return nil, err
}
if !ds2.ObjectExists(media.Location) {
@@ -366,46 +433,54 @@ func StoreDirect(f *AlreadyUploadedFile, contents io.ReadCloser, expectedSize in
// The media doesn't already exist - save it as new
if info.SizeBytes <= 0 {
- err2 := ds.DeleteObject(info.Location) // delete temp object
- if err2 != nil {
- ctx.Log.Warn("Error deleting temporary upload", err2)
- sentry.CaptureException(err2)
- }
return nil, errors.New("file has no contents")
}
err = checkSpam(contentBytes, filename, contentType, userId, origin, mediaId)
if err != nil {
- err2 := ds.DeleteObject(info.Location) // delete temp object
- if err2 != nil {
- ctx.Log.Warn("Error deleting temporary upload", err2)
- sentry.CaptureException(err2)
- }
return nil, err
}
- ctx.Log.Info("Persisting new media record")
-
- media := &types.Media{
- Origin: origin,
- MediaId: mediaId,
- UploadName: filename,
- ContentType: contentType,
- UserId: userId,
- Sha256Hash: info.Sha256Hash,
- SizeBytes: info.SizeBytes,
- DatastoreId: ds.DatastoreId,
- Location: info.Location,
- CreationTs: util.NowMillis(),
- }
+ // Check if we have reserved the metadata already, validate uploader
+ media, err := db.Get(origin, mediaId)
+ if err == sql.ErrNoRows {
+ ctx.Log.Info("Persisting new media record")
+
+ media = &types.Media{
+ Origin: origin,
+ MediaId: mediaId,
+ UploadName: filename,
+ ContentType: contentType,
+ UserId: userId,
+ Sha256Hash: info.Sha256Hash,
+ SizeBytes: info.SizeBytes,
+ DatastoreId: ds.DatastoreId,
+ Location: info.Location,
+ CreationTs: util.NowMillis(),
+ }
- err = db.Insert(media)
- if err != nil {
- err2 := ds.DeleteObject(info.Location) // delete temp object
- if err2 != nil {
- ctx.Log.Warn("Error deleting temporary upload", err2)
- sentry.CaptureException(err2)
+ if err = db.Insert(media); err != nil {
+ return nil, err
}
+ } else if err == nil {
+ ctx.Log.Info("Updating existing media record")
+
+ // last minute check if the file was already uploaded
+ if media.SizeBytes > 0 {
+ return nil, common.ErrCannotOverwriteMedia
+ }
+
+ media.UploadName = filename
+ media.ContentType = contentType
+ media.Sha256Hash = info.Sha256Hash
+ media.SizeBytes = info.SizeBytes
+ media.DatastoreId = ds.DatastoreId
+ media.Location = info.Location
+
+ if err = db.Update(media); err != nil {
+ return nil, err
+ }
+ } else {
return nil, err
}
diff --git a/internal_cache/cache.go b/internal_cache/cache.go
index b871a07..0b0a5af 100644
--- a/internal_cache/cache.go
+++ b/internal_cache/cache.go
@@ -18,4 +18,5 @@ type ContentCache interface {
MarkDownload(fileHash string)
GetMedia(sha256hash string, contents FetchFunction, ctx rcontext.RequestContext) (*CachedContent, error)
UploadMedia(sha256hash string, content io.ReadCloser, ctx rcontext.RequestContext) error
+ NotifyUpload(origin string, mediaId string, ctx rcontext.RequestContext) error
}
diff --git a/internal_cache/noop.go b/internal_cache/noop.go
index 8a4f936..9d4a264 100644
--- a/internal_cache/noop.go
+++ b/internal_cache/noop.go
@@ -35,3 +35,8 @@ func (n *NoopCache) UploadMedia(sha256hash string, content io.ReadCloser, ctx rc
// do nothing
return nil
}
+
+func (n *NoopCache) NotifyUpload(origin string, mediaId string, ctx rcontext.RequestContext) error {
+ // do nothing
+ return nil
+}
diff --git a/internal_cache/redis.go b/internal_cache/redis.go
index aeb4c2c..baacab0 100644
--- a/internal_cache/redis.go
+++ b/internal_cache/redis.go
@@ -67,3 +67,7 @@ func (c *RedisCache) UploadMedia(sha256hash string, content io.ReadCloser, ctx r
defer content.Close()
return c.redis.SetStream(ctx, sha256hash, content)
}
+
+func (c *RedisCache) NotifyUpload(origin string, mediaId string, ctx rcontext.RequestContext) error {
+ return c.redis.NotifyUpload(ctx, origin, mediaId)
+}
diff --git a/redis_cache/redis.go b/redis_cache/redis.go
index c129490..13a6434 100644
--- a/redis_cache/redis.go
+++ b/redis_cache/redis.go
@@ -12,6 +12,8 @@ import (
"github.com/sirupsen/logrus"
"github.com/turt2live/matrix-media-repo/common/config"
"github.com/turt2live/matrix-media-repo/common/rcontext"
+ "github.com/turt2live/matrix-media-repo/types"
+ "github.com/turt2live/matrix-media-repo/util"
)
var ErrCacheMiss = errors.New("missed cache")
@@ -32,14 +34,45 @@ func NewCache(conf config.RedisConfig) *RedisCache {
DB: conf.DbNum,
})
+ ctx := context.Background()
+
logrus.Info("Contacting Redis shards...")
- _ = ring.ForEachShard(context.Background(), func(ctx context.Context, client *redis.Client) error {
+ _ = ring.ForEachShard(ctx, func(ctx context.Context, client *redis.Client) error {
logrus.Infof("Pinging %s", client.String())
r, err := client.Ping(ctx).Result()
if err != nil {
return err
}
logrus.Infof("%s replied with: %s", client.String(), r)
+
+ psub := client.Subscribe(ctx, "upload")
+ go func() {
+ logrus.Infof("Client %s going to subscribe to uploads", client.String())
+ for {
+ for {
+ msg, err := psub.ReceiveMessage(ctx)
+ if err != nil {
+ break
+ }
+
+ ref := types.MediaRef{}
+ if err := ref.UnmarshalBinary([]byte(msg.Payload)); err != nil {
+ logrus.Warn("Failed to unmarshal published upload, ignoring")
+ continue
+ }
+
+ logrus.Infof("Client %s notified about %s/%s being uploaded", client.String(), ref.Origin, ref.MediaId)
+ util.NotifyUpload(ref.Origin, ref.MediaId)
+ }
+
+ if ctx.Done() != nil {
+ return
+ }
+
+ time.Sleep(time.Second * 1)
+ }
+ }()
+
return nil
})
@@ -97,3 +130,21 @@ func (c *RedisCache) GetBytes(ctx rcontext.RequestContext, key string) ([]byte,
b, err := r.Bytes()
return b, err
}
+
+func (c *RedisCache) NotifyUpload(ctx rcontext.RequestContext, origin string, mediaId string) error {
+ if c.ring.PoolStats().TotalConns == 0 {
+ return ErrCacheDown
+ }
+ r := c.ring.Publish(ctx, "upload", types.MediaRef{Origin: origin, MediaId: mediaId})
+ if r.Err() != nil {
+ if r.Err() == redis.Nil {
+ return ErrCacheMiss
+ }
+ if c.ring.PoolStats().TotalConns == 0 {
+ ctx.Log.Error(r.Err())
+ return ErrCacheDown
+ }
+ return r.Err()
+ }
+ return nil
+}
diff --git a/storage/stores/media_store.go b/storage/stores/media_store.go
index 958f1b0..71aaa3a 100644
--- a/storage/stores/media_store.go
+++ b/storage/stores/media_store.go
@@ -16,6 +16,7 @@ import (
const selectMedia = "SELECT origin, media_id, upload_name, content_type, user_id, sha256_hash, size_bytes, datastore_id, location, creation_ts, quarantined FROM media WHERE origin = $1 and media_id = $2;"
const selectMediaByHash = "SELECT origin, media_id, upload_name, content_type, user_id, sha256_hash, size_bytes, datastore_id, location, creation_ts, quarantined FROM media WHERE sha256_hash = $1;"
const insertMedia = "INSERT INTO media (origin, media_id, upload_name, content_type, user_id, sha256_hash, size_bytes, datastore_id, location, creation_ts, quarantined) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11);"
+const updateMedia = "UPDATE media SET upload_name = $3, content_type = $4, sha256_hash = $5, size_bytes = $6, datastore_id = $7, location = $8 WHERE origin = $1 AND media_id = $2;"
const selectOldMedia = "SELECT m.origin, m.media_id, m.upload_name, m.content_type, m.user_id, m.sha256_hash, m.size_bytes, m.datastore_id, m.location, m.creation_ts, quarantined FROM media AS m WHERE m.origin <> ANY($1) AND m.creation_ts < $2 AND (SELECT COUNT(*) FROM media AS d WHERE d.sha256_hash = m.sha256_hash AND d.creation_ts >= $2) = 0 AND (SELECT COUNT(*) FROM media AS d WHERE d.sha256_hash = m.sha256_hash AND d.origin = ANY($1)) = 0;"
const selectOrigins = "SELECT DISTINCT origin FROM media;"
const deleteMedia = "DELETE FROM media WHERE origin = $1 AND media_id = $2;"
@@ -47,6 +48,7 @@ type mediaStoreStatements struct {
selectMedia *sql.Stmt
selectMediaByHash *sql.Stmt
insertMedia *sql.Stmt
+ updateMedia *sql.Stmt
selectOldMedia *sql.Stmt
selectOrigins *sql.Stmt
deleteMedia *sql.Stmt
@@ -97,6 +99,9 @@ func InitMediaStore(sqlDb *sql.DB) (*MediaStoreFactory, error) {
if store.stmts.insertMedia, err = store.sqlDb.Prepare(insertMedia); err != nil {
return nil, err
}
+ if store.stmts.updateMedia, err = store.sqlDb.Prepare(updateMedia); err != nil {
+ return nil, err
+ }
if store.stmts.selectOldMedia, err = store.sqlDb.Prepare(selectOldMedia); err != nil {
return nil, err
}
@@ -190,6 +195,22 @@ func (s *MediaStore) Insert(media *types.Media) error {
return err
}
+func (s *MediaStore) Update(media *types.Media) error {
+ _, err := s.statements.updateMedia.ExecContext(
+ s.ctx,
+ media.Origin,
+ media.MediaId,
+ media.UploadName,
+ media.ContentType,
+ media.Sha256Hash,
+ media.SizeBytes,
+ media.DatastoreId,
+ media.Location,
+ )
+
+ return err
+}
+
func (s *MediaStore) GetByHash(hash string) ([]*types.Media, error) {
rows, err := s.statements.selectMediaByHash.QueryContext(s.ctx, hash)
if err != nil {
diff --git a/types/media.go b/types/media.go
index 873da95..9172ae2 100644
--- a/types/media.go
+++ b/types/media.go
@@ -1,6 +1,22 @@
package types
-import "io"
+import (
+ "encoding/json"
+ "io"
+)
+
+type MediaRef struct {
+ Origin string
+ MediaId string
+}
+
+func (ref MediaRef) MarshalBinary() ([]byte, error) {
+ return json.Marshal(ref)
+}
+
+func (ref *MediaRef) UnmarshalBinary(data []byte) error {
+ return json.Unmarshal(data, ref)
+}
type Media struct {
Origin string
diff --git a/util/upload_notifier.go b/util/upload_notifier.go
new file mode 100644
index 0000000..84a9bd4
--- /dev/null
+++ b/util/upload_notifier.go
@@ -0,0 +1,61 @@
+package util
+
+import (
+ "sync"
+ "time"
+)
+
+type mediaSet map[chan struct{}]struct{}
+
+var waiterLock = &sync.Mutex{}
+var waiters = map[string]mediaSet{}
+
+func WaitForUpload(origin string, mediaId string, timeout time.Duration) bool {
+ key := origin + mediaId
+ ch := make(chan struct{}, 1)
+
+ waiterLock.Lock()
+ var set mediaSet
+ var ok bool
+ if set, ok = waiters[key]; !ok {
+ set = make(mediaSet)
+ waiters[key] = set
+ }
+ set[ch] = struct{}{}
+ waiterLock.Unlock()
+
+ defer func() {
+ waiterLock.Lock()
+
+ delete(set, ch)
+ close(ch)
+
+ if len(set) == 0 {
+ delete(waiters, key)
+ }
+
+ waiterLock.Unlock()
+ }()
+
+ select {
+ case <-ch:
+ return true
+ case <-time.After(timeout):
+ return false
+ }
+}
+
+func NotifyUpload(origin string, mediaId string) {
+ waiterLock.Lock()
+ defer waiterLock.Unlock()
+
+ set := waiters[origin+mediaId]
+
+ if set == nil {
+ return
+ }
+
+ for channel := range set {
+ channel <- struct{}{}
+ }
+}
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