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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,210 @@ | ||
| // mautrix-whatsapp - A Matrix-WhatsApp puppeting bridge. | ||
| // Copyright (C) 2024 Tulir Asokan | ||
| // | ||
| // This program is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU Affero General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // This program is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU Affero General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Affero General Public License | ||
| // along with this program. If not, see <https://www.gnu.org/licenses/>. | ||
|
|
||
| package connector | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "errors" | ||
| "fmt" | ||
| "net/http" | ||
| "os" | ||
| "sync" | ||
|
|
||
| "github.com/rs/zerolog" | ||
| "go.mau.fi/util/exsync" | ||
| "go.mau.fi/whatsmeow" | ||
| "go.mau.fi/whatsmeow/proto/waMmsRetry" | ||
| "go.mau.fi/whatsmeow/types/events" | ||
| "maunium.net/go/mautrix" | ||
| "maunium.net/go/mautrix/bridgev2" | ||
| "maunium.net/go/mautrix/bridgev2/database" | ||
| "maunium.net/go/mautrix/bridgev2/networkid" | ||
| "maunium.net/go/mautrix/mediaproxy" | ||
|
|
||
| "go.mau.fi/mautrix-whatsapp/pkg/msgconv" | ||
| "go.mau.fi/mautrix-whatsapp/pkg/waid" | ||
| ) | ||
|
|
||
| var _ bridgev2.DirectMediableNetwork = (*WhatsAppConnector)(nil) | ||
|
|
||
| func (wa *WhatsAppConnector) SetUseDirectMedia() { | ||
| wa.MsgConv.DirectMedia = true | ||
| } | ||
|
|
||
| var ErrReloadNeeded = mautrix.RespError{ | ||
| ErrCode: "FI.MAU.WHATSAPP_RELOAD_NEEDED", | ||
| Err: "Media is no longer available on WhatsApp servers and must be re-requested from your phone", | ||
| StatusCode: http.StatusNotFound, | ||
| } | ||
|
|
||
| func (wa *WhatsAppConnector) Download(ctx context.Context, mediaID networkid.MediaID, params map[string]string) (mediaproxy.GetMediaResponse, error) { | ||
| parsedID, receiverID, err := waid.ParseMediaID(mediaID) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| msg, err := wa.Bridge.DB.Message.GetFirstPartByID(ctx, receiverID, parsedID.String()) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to get message: %w", err) | ||
| } else if msg == nil { | ||
| return nil, fmt.Errorf("message not found") | ||
| } | ||
| dmm := msg.Metadata.(*waid.MessageMetadata).DirectMediaMeta | ||
| if dmm == nil { | ||
| return nil, fmt.Errorf("message does not have direct media metadata") | ||
| } | ||
| var keys *msgconv.FailedMediaKeys | ||
| err = json.Unmarshal(dmm, &keys) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to unmarshal media keys: %w", err) | ||
| } | ||
| var ul *bridgev2.UserLogin | ||
| if receiverID != "" { | ||
| ul = wa.Bridge.GetCachedUserLoginByID(receiverID) | ||
| } else { | ||
| logins, err := wa.Bridge.GetUserLoginsInPortal(ctx, msg.Room) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to get user logins in portal: %w", err) | ||
| } | ||
| for _, login := range logins { | ||
| if login.Client.IsLoggedIn() { | ||
| ul = login | ||
| break | ||
| } | ||
| } | ||
| } | ||
| if ul == nil || !ul.Client.IsLoggedIn() { | ||
| return nil, fmt.Errorf("no logged in user found") | ||
| } | ||
| waClient := ul.Client.(*WhatsAppClient) | ||
| if waClient.Client == nil { | ||
| return nil, fmt.Errorf("no WhatsApp client found on login") | ||
| } | ||
| return &mediaproxy.GetMediaResponseFile{ | ||
| Callback: func(f *os.File) error { | ||
| err := waClient.Client.DownloadToFile(keys, f) | ||
| if errors.Is(err, whatsmeow.ErrMediaDownloadFailedWith403) || errors.Is(err, whatsmeow.ErrMediaDownloadFailedWith404) || errors.Is(err, whatsmeow.ErrMediaDownloadFailedWith410) { | ||
| if _, tryReload := params["fi.mau.whatsapp.reload_media"]; !tryReload { | ||
| return ErrReloadNeeded | ||
| } | ||
| err = waClient.requestAndWaitDirectMedia(ctx, msg.ID, keys) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| err = waClient.Client.DownloadToFile(keys, f) | ||
| } | ||
| if errors.Is(err, whatsmeow.ErrFileLengthMismatch) || errors.Is(err, whatsmeow.ErrInvalidMediaSHA256) { | ||
| zerolog.Ctx(ctx).Warn().Err(err).Msg("Mismatching media checksums in message. Ignoring because WhatsApp seems to ignore them too") | ||
| } else if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| }, | ||
| // TODO? | ||
| ContentType: "", | ||
| }, nil | ||
| } | ||
|
|
||
| type directMediaRetry struct { | ||
| sync.Mutex | ||
| resultURL string | ||
| wait *exsync.Event | ||
| requested bool | ||
| } | ||
|
|
||
| func (wa *WhatsAppClient) getDirectMediaRetryState(msgID networkid.MessageID, create bool) *directMediaRetry { | ||
| wa.directMediaLock.Lock() | ||
| defer wa.directMediaLock.Unlock() | ||
| retry, ok := wa.directMediaRetries[msgID] | ||
| if !ok && create { | ||
| retry = &directMediaRetry{ | ||
| wait: exsync.NewEvent(), | ||
| } | ||
| wa.directMediaRetries[msgID] = retry | ||
| } | ||
| return retry | ||
| } | ||
|
|
||
| func (wa *WhatsAppClient) requestAndWaitDirectMedia(ctx context.Context, rawMsgID networkid.MessageID, keys *msgconv.FailedMediaKeys) error { | ||
| state, err := wa.requestDirectMedia(rawMsgID, keys.Key) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| select { | ||
| case <-state.wait.GetChan(): | ||
| keys.DirectPath = state.resultURL | ||
| return nil | ||
| case <-ctx.Done(): | ||
| return ctx.Err() | ||
| } | ||
| } | ||
|
|
||
| func (wa *WhatsAppClient) requestDirectMedia(rawMsgID networkid.MessageID, key []byte) (*directMediaRetry, error) { | ||
| state := wa.getDirectMediaRetryState(rawMsgID, true) | ||
| state.Lock() | ||
| defer state.Unlock() | ||
| if !state.requested { | ||
| err := wa.sendMediaRequestDirect(rawMsgID, key) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to send media retry request: %w", err) | ||
| } | ||
| state.requested = true | ||
| } | ||
| return state, nil | ||
| } | ||
|
|
||
| func (wa *WhatsAppClient) receiveDirectMediaRetry(ctx context.Context, msg *database.Message, retry *events.MediaRetry) { | ||
| state := wa.getDirectMediaRetryState(msg.ID, false) | ||
| if state != nil { | ||
| state.Lock() | ||
| defer state.Unlock() | ||
| } | ||
| log := zerolog.Ctx(ctx) | ||
| var keys msgconv.FailedMediaKeys | ||
| err := json.Unmarshal(msg.Metadata.(*waid.MessageMetadata).DirectMediaMeta, &keys) | ||
| if err != nil { | ||
| log.Err(err).Msg("Failed to parse direct media metadata for media retry") | ||
| return | ||
| } | ||
| retryData, err := whatsmeow.DecryptMediaRetryNotification(retry, keys.Key) | ||
| if err != nil { | ||
| log.Warn().Err(err).Msg("Failed to decrypt media retry notification") | ||
| return | ||
| } else if retryData.GetResult() != waMmsRetry.MediaRetryNotification_SUCCESS { | ||
| errorName := waMmsRetry.MediaRetryNotification_ResultType_name[int32(retryData.GetResult())] | ||
| if retryData.GetDirectPath() == "" { | ||
| log.Warn().Str("error_name", errorName).Msg("Got error response in media retry notification") | ||
| log.Debug().Any("error_content", retryData).Msg("Full error response content") | ||
| return | ||
| } | ||
| log.Debug().Msg("Got error response in media retry notification, but response also contains a new download URL") | ||
| } | ||
| keys.DirectPath = retryData.GetDirectPath() | ||
| msg.Metadata.(*waid.MessageMetadata).DirectMediaMeta, err = json.Marshal(keys) | ||
| if err != nil { | ||
| log.Err(err).Msg("Failed to marshal updated direct media metadata") | ||
| return | ||
| } | ||
| err = wa.Main.Bridge.DB.Message.Update(ctx, msg) | ||
| if err != nil { | ||
| log.Err(err).Msg("Failed to update message with new direct media metadata") | ||
| } | ||
| if state != nil { | ||
| state.resultURL = retryData.GetDirectPath() | ||
| state.wait.Set() | ||
| } | ||
| } |
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