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[chore] Refactor federatingDB.Undo, avoid 500 errors on Undo Like (#3310)

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tobi 2024-09-16 17:49:40 +02:00 committed by GitHub
parent 71261c62c2
commit 0567b319c6
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3 changed files with 197 additions and 90 deletions
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24
internal/federation/federatingactor.go
View file

@ -170,14 +170,22 @@ func (f *federatingActor) PostInboxScheme(ctx context.Context, w http.ResponseWr
//
// Post the activity to the Actor's inbox and trigger side effects.
if err := f.sideEffectActor.PostInbox(ctx, inboxID, activity); err != nil {
// Special case: We know it is a bad request if the object or target
// props needed to be populated, or we failed parsing activity details.
// Send the rejection to the peer.
if errors.Is(err, pub.ErrObjectRequired) ||
errors.Is(err, pub.ErrTargetRequired) ||
gtserror.IsMalformed(err) {
// Check if a function in the federatingDB
// has returned an explicit errWithCode for us.
if errWithCode, ok := err.(gtserror.WithCode); ok {
return false, errWithCode
}
// Check if it's a bad request because the
// object or target props weren't populated,
// or we failed parsing activity details.
//
// Log such activities to help debug, then
// return the rejection (400) to the peer.
if gtserror.IsMalformed(err) ||
errors.Is(err, pub.ErrObjectRequired) ||
errors.Is(err, pub.ErrTargetRequired) {
// Log malformed activities to help debug.
l = l.WithField("activity", activity)
l.Warnf("malformed incoming activity: %v", err)
@ -185,7 +193,7 @@ func (f *federatingActor) PostInboxScheme(ctx context.Context, w http.ResponseWr
return false, gtserror.NewErrorBadRequest(errors.New(text), text)
}
// There's been some real error.
// Default: there's been some real error.
err := gtserror.Newf("error calling sideEffectActor.PostInbox: %w", err)
return false, gtserror.NewErrorInternalError(err)
}

257
internal/federation/federatingdb/undo.go
View file

@ -33,14 +33,13 @@
)
func (f *federatingDB) Undo(ctx context.Context, undo vocab.ActivityStreamsUndo) error {
l := log.WithContext(ctx)
if log.Level() >= level.DEBUG {
i, err := marshalItem(undo)
if err != nil {
return err
}
l = l.WithField("undo", i)
l := log.WithContext(ctx).
WithField("undo", i)
l.Debug("entering Undo")
}
@ -52,80 +51,129 @@ func (f *federatingDB) Undo(ctx context.Context, undo vocab.ActivityStreamsUndo)
requestingAcct := activityContext.requestingAcct
receivingAcct := activityContext.receivingAcct
var errs gtserror.MultiError
for _, object := range ap.ExtractObjects(undo) {
// Try to get object as vocab.Type,
// else skip handling (likely) IRI.
objType := object.GetType()
if objType == nil {
asType := object.GetType()
if asType == nil {
continue
}
switch objType.GetTypeName() {
// Check and handle any
// vocab.Type objects.
switch asType.GetTypeName() {
// UNDO FOLLOW
case ap.ActivityFollow:
if err := f.undoFollow(ctx, receivingAcct, requestingAcct, undo, objType); err != nil {
errs.Appendf("error undoing follow: %w", err)
if err := f.undoFollow(
ctx,
receivingAcct,
requestingAcct,
undo,
asType,
); err != nil {
return err
}
// UNDO LIKE
case ap.ActivityLike:
if err := f.undoLike(ctx, receivingAcct, requestingAcct, undo, objType); err != nil {
errs.Appendf("error undoing like: %w", err)
if err := f.undoLike(
ctx,
receivingAcct,
requestingAcct,
undo,
asType,
); err != nil {
return err
}
// UNDO BLOCK
case ap.ActivityBlock:
if err := f.undoBlock(
ctx,
receivingAcct,
requestingAcct,
undo,
asType,
); err != nil {
return err
}
// UNDO ANNOUNCE
case ap.ActivityAnnounce:
// TODO: actually handle this!
log.Warn(ctx, "skipped undo announce")
case ap.ActivityBlock:
if err := f.undoBlock(ctx, receivingAcct, requestingAcct, undo, objType); err != nil {
errs.Appendf("error undoing block: %w", err)
}
}
}
return errs.Combine()
return nil
}
func (f *federatingDB) undoFollow(
ctx context.Context,
receivingAccount *gtsmodel.Account,
requestingAccount *gtsmodel.Account,
receivingAcct *gtsmodel.Account,
requestingAcct *gtsmodel.Account,
undo vocab.ActivityStreamsUndo,
t vocab.Type,
) error {
Follow, ok := t.(vocab.ActivityStreamsFollow)
asFollow, ok := t.(vocab.ActivityStreamsFollow)
if !ok {
return errors.New("undoFollow: couldn't parse vocab.Type into vocab.ActivityStreamsFollow")
err := fmt.Errorf("%T not parseable as vocab.ActivityStreamsFollow", t)
return gtserror.SetMalformed(err)
}
// Make sure the undo actor owns the target.
if !sameActor(undo.GetActivityStreamsActor(), Follow.GetActivityStreamsActor()) {
// Make sure the Undo
// actor owns the target.
if !sameActor(
undo.GetActivityStreamsActor(),
asFollow.GetActivityStreamsActor(),
) {
// Ignore this Activity.
return nil
}
follow, err := f.converter.ASFollowToFollow(ctx, Follow)
if err != nil {
return fmt.Errorf("undoFollow: error converting ActivityStreams Follow to follow: %w", err)
// Convert AS Follow to barebones *gtsmodel.Follow,
// retrieving origin + target accts from the db.
follow, err := f.converter.ASFollowToFollow(
gtscontext.SetBarebones(ctx),
asFollow,
)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
err := gtserror.Newf("error converting AS Follow to follow: %w", err)
return err
}
// We were missing origin or
// target for this Follow, so
// we cannot Undo anything.
if follow == nil {
return nil
}
// Ensure addressee is follow target.
if follow.TargetAccountID != receivingAccount.ID {
// Ignore this Activity.
return nil
if follow.TargetAccountID != receivingAcct.ID {
const text = "receivingAcct was not Follow target"
return gtserror.NewErrorForbidden(errors.New(text), text)
}
// Ensure requester is follow origin.
if follow.AccountID != requestingAccount.ID {
// Ignore this Activity.
return nil
if follow.AccountID != requestingAcct.ID {
const text = "requestingAcct was not Follow origin"
return gtserror.NewErrorForbidden(errors.New(text), text)
}
// Delete any existing follow with this URI.
if err := f.state.DB.DeleteFollowByURI(ctx, follow.URI); err != nil && !errors.Is(err, db.ErrNoEntries) {
return fmt.Errorf("undoFollow: db error removing follow: %w", err)
err = f.state.DB.DeleteFollowByURI(ctx, follow.URI)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
err := gtserror.Newf("db error deleting follow: %w", err)
return err
}
// Delete any existing follow request with this URI.
if err := f.state.DB.DeleteFollowRequestByURI(ctx, follow.URI); err != nil && !errors.Is(err, db.ErrNoEntries) {
return fmt.Errorf("undoFollow: db error removing follow request: %w", err)
err = f.state.DB.DeleteFollowRequestByURI(ctx, follow.URI)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
err := gtserror.Newf("db error deleting follow request: %w", err)
return err
}
log.Debug(ctx, "Follow undone")
@ -134,58 +182,89 @@ func (f *federatingDB) undoFollow(
func (f *federatingDB) undoLike(
ctx context.Context,
receivingAccount *gtsmodel.Account,
requestingAccount *gtsmodel.Account,
receivingAcct *gtsmodel.Account,
requestingAcct *gtsmodel.Account,
undo vocab.ActivityStreamsUndo,
t vocab.Type,
) error {
Like, ok := t.(vocab.ActivityStreamsLike)
asLike, ok := t.(vocab.ActivityStreamsLike)
if !ok {
return errors.New("undoLike: couldn't parse vocab.Type into vocab.ActivityStreamsLike")
err := fmt.Errorf("%T not parseable as vocab.ActivityStreamsLike", t)
return gtserror.SetMalformed(err)
}
// Make sure the undo actor owns the target.
if !sameActor(undo.GetActivityStreamsActor(), Like.GetActivityStreamsActor()) {
// Make sure the Undo
// actor owns the target.
if !sameActor(
undo.GetActivityStreamsActor(),
asLike.GetActivityStreamsActor(),
) {
// Ignore this Activity.
return nil
}
fave, err := f.converter.ASLikeToFave(ctx, Like)
if err != nil {
return fmt.Errorf("undoLike: error converting ActivityStreams Like to fave: %w", err)
// Convert AS Like to barebones *gtsmodel.StatusFave,
// retrieving liking acct and target status from the DB.
fave, err := f.converter.ASLikeToFave(
gtscontext.SetBarebones(ctx),
asLike,
)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
err := gtserror.Newf("error converting AS Like to fave: %w", err)
return err
}
// We were missing status, account,
// or other for this Like, so we
// cannot Undo anything.
if fave == nil {
return nil
}
// Ensure addressee is fave target.
if fave.TargetAccountID != receivingAccount.ID {
// Ignore this Activity.
return nil
if fave.TargetAccountID != receivingAcct.ID {
const text = "receivingAcct was not Fave target"
return gtserror.NewErrorForbidden(errors.New(text), text)
}
// Ensure requester is fave origin.
if fave.AccountID != requestingAccount.ID {
// Ignore this Activity.
return nil
if fave.AccountID != requestingAcct.ID {
const text = "requestingAcct was not Fave origin"
return gtserror.NewErrorForbidden(errors.New(text), text)
}
// Fetch fave from the DB so we know the ID to delete it.
//
// Ignore URI on Likes, since we often get multiple Likes
// with the same target and account ID, but differing URIs.
// Instead, we'll select using account and target status.
//
// Regardless of the URI, we can read an Undo Like to mean
// "I don't want to fave this post anymore".
fave, err = f.state.DB.GetStatusFave(gtscontext.SetBarebones(ctx), fave.AccountID, fave.StatusID)
if err != nil {
if errors.Is(err, db.ErrNoEntries) {
// We didn't have a like/fave
// for this combo anyway, ignore.
return nil
}
// Real error.
return fmt.Errorf("undoLike: db error getting fave from %s targeting %s: %w", fave.AccountID, fave.StatusID, err)
fave, err = f.state.DB.GetStatusFave(
gtscontext.SetBarebones(ctx),
fave.AccountID,
fave.StatusID,
)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
err := gtserror.Newf(
"db error getting fave from %s targeting %s: %w",
fave.AccountID, fave.StatusID, err,
)
return err
}
// Delete the status fave.
if fave == nil {
// We didn't have this fave
// stored anyway, so we can't
// Undo it, just ignore.
return nil
}
// Delete the fave.
if err := f.state.DB.DeleteStatusFaveByID(ctx, fave.ID); err != nil {
return fmt.Errorf("undoLike: db error deleting fave %s: %w", fave.ID, err)
err := gtserror.Newf("db error deleting fave %s: %w", fave.ID, err)
return err
}
log.Debug(ctx, "Like undone")
@ -194,42 +273,62 @@ func (f *federatingDB) undoLike(
func (f *federatingDB) undoBlock(
ctx context.Context,
receivingAccount *gtsmodel.Account,
requestingAccount *gtsmodel.Account,
receivingAcct *gtsmodel.Account,
requestingAcct *gtsmodel.Account,
undo vocab.ActivityStreamsUndo,
t vocab.Type,
) error {
Block, ok := t.(vocab.ActivityStreamsBlock)
asBlock, ok := t.(vocab.ActivityStreamsBlock)
if !ok {
return errors.New("undoBlock: couldn't parse vocab.Type into vocab.ActivityStreamsBlock")
err := fmt.Errorf("%T not parseable as vocab.ActivityStreamsBlock", t)
return gtserror.SetMalformed(err)
}
// Make sure the undo actor owns the target.
if !sameActor(undo.GetActivityStreamsActor(), Block.GetActivityStreamsActor()) {
// Make sure the Undo
// actor owns the target.
if !sameActor(
undo.GetActivityStreamsActor(),
asBlock.GetActivityStreamsActor(),
) {
// Ignore this Activity.
return nil
}
block, err := f.converter.ASBlockToBlock(ctx, Block)
if err != nil {
return fmt.Errorf("undoBlock: error converting ActivityStreams Block to block: %w", err)
// Convert AS Block to barebones *gtsmodel.Block,
// retrieving origin + target accts from the DB.
block, err := f.converter.ASBlockToBlock(
gtscontext.SetBarebones(ctx),
asBlock,
)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
err := gtserror.Newf("error converting AS Block to block: %w", err)
return err
}
// We were missing origin or
// target for this Block, so
// we cannot Undo anything.
if block == nil {
return nil
}
// Ensure addressee is block target.
if block.TargetAccountID != receivingAccount.ID {
// Ignore this Activity.
return nil
if block.TargetAccountID != receivingAcct.ID {
const text = "receivingAcct was not Block target"
return gtserror.NewErrorForbidden(errors.New(text), text)
}
// Ensure requester is block origin.
if block.AccountID != requestingAccount.ID {
// Ignore this Activity.
return nil
if block.AccountID != requestingAcct.ID {
const text = "requestingAcct was not Block origin"
return gtserror.NewErrorForbidden(errors.New(text), text)
}
// Delete any existing BLOCK
if err := f.state.DB.DeleteBlockByURI(ctx, block.URI); err != nil && !errors.Is(err, db.ErrNoEntries) {
return fmt.Errorf("undoBlock: db error removing block: %w", err)
// Delete any existing block.
err = f.state.DB.DeleteBlockByURI(ctx, block.URI)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
err := gtserror.Newf("db error deleting block: %w", err)
return err
}
log.Debug(ctx, "Block undone")

2
internal/typeutils/astointernal.go
View file

@ -861,7 +861,7 @@ func (c *Converter) getASObjectStatus(ctx context.Context, id string, with ap.Wi
// Check for status in database with provided object URI.
status, err := c.state.DB.GetStatusByURI(ctx, object[0].String())
if err != nil {
return nil, gtserror.Newf("error getting object account from database: %w", err)
return nil, gtserror.Newf("error getting object status from database: %w", err)
}
return status, nil