[dreamwidth/dreamwidth] 11c403: Fix feed fetching on Ubuntu 22.04+ and reduce back...

[github]

Branch: refs/heads/main Home: https://github.com/dreamwidth/dreamwidth Commit: 11c40353c19cc0d986a932efe41668023117b3c6 https://github.com/dreamwidth/dreamwidth/commit/11c40353c19cc0d986a932efe41668023117b3c6 Author: Mark Smith mark@dreamwidth.org Date: 2026-03-11 (Wed, 11 Mar 2026)

Changed paths: M cgi-bin/LJ/SynSuck.pm M cgi-bin/ljlib.pl

Log Message:

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Fix feed fetching on Ubuntu 22.04+ and reduce backoff aggressiveness

Force HTTP/1.1 via SSL_alpn_protocols in LJ::get_useragent. LWP does not support HTTP/2, but IO::Socket::SSL on 22.04+ advertises h2 via ALPN by default, causing servers like Tumblr to respond with HTTP/2 which LWP can't parse ("500 Server closed connection").

Also reduce exponential backoff cap from 30 days to 48 hours (max multiplier 2^4=16 instead of 2^7=128) and replace fixed 0-4 minute jitter with proportional jitter (up to 10% of delay) so retries stagger more effectively.

Co-Authored-By: Claude Opus 4.6 noreply@anthropic.com

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