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rework INM/IMS handling for AsyncStaticWebHandler - #190
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Good catch! |
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Nice! Thanks! |
IMS template must contain GMT timezone, not local - "%a, %d %b %Y %H:%M:%S GMT" create etag based on timestamp + filesize INM header handling should have precedence over IMS
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@vortigont : I added a comment here about the etag: #190 (comment) There are still issues regarding the http spec compliance, issues which were already existing before anyway - so worth fixing them also in this PR :-) |
mathieucarbou
approved these changes
Jan 9, 2025
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Have faced some problems where I received wrong 304 replies for static files.
The issue was that if some file generated and written on filesystem before WiFi connects and aqures proper time file's timestamp was about +2 +3 seconds UTC and that could lead to improper 304 replies to the clients that was previously had this file.
So I've added some fixes and improvements
IMS template must contain GMT timezone, not local - "%a, %d %b %Y %H:%M:%S GMT"
server used to reply with local timezone specifier but used GMT time.
create etag header based on timestamp + filesize, it adds a bit of entropy for files which are created soon after boot
INM header handling should have precedence over IMS when checking if content is not modified and since etag already includes timestamp further check could be skipped