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https://github.com/dex4er/thrall

a simple PSGI/Plack server that uses threads
https://github.com/dex4er/thrall

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a simple PSGI/Plack server that uses threads

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README 

        
NAME



    thrall - Simple PSGI/Plack HTTP server that uses threads



SYNOPSIS



        $ thrall --max-workers=20 --max-reqs-per-child=100 app.psgi

    

        $ thrall --port=80 --ipv6=1 app.psgi

    

        $ thrall --port=443 --ssl=1 --ssl-key-file=file.key --ssl-cert-file=file.crt app.psgi

    

        $ thrall --socket=/tmp/thrall.sock app.psgi



DESCRIPTION



    Thrall is a standalone HTTP/1.1 server with keep-alive support. It uses

    threads instead pre-forking, so it works correctly on Windows. It is a

    pure-Perl implementation that doesn't require any XS package.



    Thrall was started as a fork of Starlet server. It has almost the same

    code as Starlet and it was adapted to use threads instead fork().



SEE ALSO



    Starlight, Starlet, Starman



LIMITATIONS



    See "BUGS AND LIMITATIONS" in threads and "Thread-Safety of System

    Libraries" in perlthrtut to read about limitations for PSGI

    applications started with Thrall and check if you encountered a known

    problem.



    Especially, PSGI applications should avoid: changing the current

    working directory, catching signals, and starting new processes.

    Environment variables might (Linux, Unix) or might not (Windows) be

    shared between threads.



    Thrall is very slow on the first request for each thread. It is because

    spawning new threads is slow in Perl itself. Thrall is very fast on

    another request and generally is faster than any implementation which

    uses fork.



BUGS



    There is a problem with Perl threads implementation which occurs on

    Windows. Some requests can fail with the message:



      failed to set socket to nonblocking mode:An operation was attempted

      on something that is not a socket.



    or



      Bad file descriptor at (eval 24) line 4.



    Cygwin version seems to be correct.



    This problem was introduced in Perl 5.16 and fixed in Perl 5.19.5.



    See https://rt.perl.org/rt3/Public/Bug/Display.html?id=119003 and

    https://github.com/dex4er/Thrall/issues/5 for more information about

    this issue.



 MacOS



    MacOS High Sierra and newer shows error:



      objc[12345]: +[__NSCFConstantString initialize] may have been in

      progress in another thread when fork() was called. objc[12345]:

      +[__NSCFConstantString initialize] may have been in progress in

      another thread when fork() was called. We cannot safely call it or

      ignore it in the fork() child process. Crashing instead. Set a

      breakpoint on objc_initializeAfterForkError to debug.



    This error is caused by an added security to restrict multithreading.



    To override the limitation, run export

    OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES before using this server.



 Reporting



    If you find the bug or want to implement new features, please report it

    at https://github.com/dex4er/Thrall/issues



    The code repository is available at http://github.com/dex4er/Thrall



AUTHORS



    Piotr Roszatycki 



    Based on Starlet by:



    Kazuho Oku



    miyagawa



    kazeburo



    Some code based on Plack:



    Tatsuhiko Miyagawa



    Some code based on Net::Server::Daemonize:



    Jeremy Howard 



    Paul Seamons 



LICENSE



    Copyright (c) 2013-2017, 2023 Piotr Roszatycki .



    This is free software; you can redistribute it and/or modify it under

    the same terms as perl itself.



    See http://dev.perl.org/licenses/artistic.html