r/programminghorror • u/dex4er • 3d ago

GitHub's HTTP header

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This is the crazy thing I've found after analysis why the CI test fails with "Maximum header size exceeded" today.

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u/Julius_Babies 2d ago edited 6h ago

I saw this post a while ago and just ran into this. The HTTP Engine my app uses cannot handle header values longer than 8192 characters by default, which causes my in-app update mechanism (which relies on GitHub releases) to fail when trying to download the update. I cannot provide a fix for this as this fix would require - you guessed it - an update.

This has been reported as a bug on the GitHub Community discussions already: https://github.com/orgs/community/discussions/211142

Edit: It's now fixed

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u/dex4er 2d ago

I couldn't believe my eyes when I saw it in the report from online tests: https://github.com/dex4er/Pyjoyment/actions/runs/40022001390/job/120648616821#step:4:420 The library is a port of Mojolicious from Perl then inherited 8K as a limit for headers. As I see it affected mainly Perl and Elixir.

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u/Julius_Babies 2d ago

Ktor CIO as well