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It's now possible to use WwwStatic as a standalone PSGI
app to serve static files and recreate the award-winning
web design of https://public-inbox.org/ :>
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We can use Perl's sysopen function to pass O_NONBLOCK to open(2)
and avoid blocking on FIFOs. This avoids a TOCTTOU race where
somebody can change a regular to FIFO in between the stat(2) and
open(2) syscalls.
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open() is a much more expensive syscall than stat(),
so avoid it
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Remove redundant "r" functions for generating short error
responses. These responses will no longer be cached by clients,
which is probably a good thing since most errors ought to be
transient, anyways. This also fixes error responses for our
cgit wrapper when static files are missing.
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We're already serving static files for cgit, and will serve more
static files, soon.
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"psgix." extensions aren't guaranteed, so make we should
try and support some theoretical generic PSGI servers
without "psgix.io" on errors by die-ing.
While we're at it, make the error handling path more obvious by
sharing more code between the EOF and errno ($!) cases.
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Make it easier to share code between our GitHTTPBackend and Cgit
packages, for now, and possibly other packages in the future.
We can avoid inline_object and anonymous subs at the same
time, reducing per-request memory overhead.
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