Mercurial > prosody-modules
view mod_sift/README.markdown @ 4651:8231774f5bfd
mod_cloud_notify_encrypted: Ensure body substring remains valid UTF-8
The `body:sub()` call risks splitting the string in the middle of a
multi-byte UTF-8 sequence. This should have been caught by util.stanza
validation, but that would have caused some havoc, at the very least causing
the notification to not be sent.
There have been no reports of this happening. Likely because this module
isn't widely deployed among users with languages that use many longer UTF-8
sequences.
The util.encodings.utf8.valid() function is O(n) where only the last
sequence really needs to be checked, but it's in C and expected to be fast.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Sun, 22 Aug 2021 13:22:59 +0200 |
| parents | d3231a4d6a60 |
| children |
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--- labels: - 'Stage-Alpha' summary: 'XEP-0273: Stanza Interception and Filtering Technology' ... Introduction ============ [SIFT][XEP-0273] is a technology to allow clients to filter incoming traffic on the server. This helps save bandwidth, etc. Compatibility ============= ----- ------- 0.7 Works ----- ------- Quirks ====== This implementation is a work in progress. - Stanzas to full JIDs get sifted correctly - Stanzas to bare JIDs are currently allowed/disallowed for all resources as a whole, and not for individual resources - Presence is only sent to available resources, and probes are not sent for unavailable reasources - This module currently does not interact with offline messages (filtered messages are dropped with an error reply) - Not tested with privacy lists