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[bugfix] Fix possible race condition in federatingdb (#490)

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Signed-off-by: kim <grufwub@gmail.com>
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kim 2022-04-28 10:18:27 +01:00 • committed by GitHub
commit cc5f2e98b7
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11 changed files with 131 additions and 220 deletions
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8
vendor/github.com/superseriousbusiness/activity/pub/handlers.go generated vendored
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@ -64,18 +64,20 @@ func NewActivityStreamsHandlerScheme(db Database, clock Clock, scheme string) Ha
}
isASRequest = true
id := requestId(r, scheme)
var unlock func()
// Lock and obtain a copy of the requested ActivityStreams value
err = db.Lock(c, id)
unlock, err = db.Lock(c, id)
if err != nil {
return
}
// WARNING: Unlock not deferred
t, err := db.Get(c, id)
unlock() // unlock even on error
if err != nil {
db.Unlock(c, id)
return
}
db.Unlock(c, id)
// Unlock must have been called by this point and in every
// branch above
if t == nil {