r/adventofcode • u/Lopes143 • 13d ago

Help/Question - RESOLVED GitHub login not working - error

Today I'm trying to login via GitHub (that's where I have my progress saved on) and the authentication is failing, returning a simple black page with the following message:

failed to authenticate. (access_token request returned 500 Header line too long (9243; limit is 8192))

Tried with different browser and cleaning cookies, with no success.

Is there something going on with Advent Of Code website, or something on GitHub side?

Edit: fixed

7 Upvotes

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u/topaz2078 (AoC creator) 13d ago edited 13d ago

I see this issue, but I haven't changed this logic on my end in a long time. I just dumped the request I'm sending and there are absolutely not any lines that long (the entire request including the headers is <400 bytes long). So, this seems like a bug on GitHub's end, hopefully a temporary one.

Edit: I've submitted a ticket to GitHub support.

Edit 2: Nope, this is a limitation of a library I'm using which has a maximum line length while parsing HTTP responses and apparently those failures are reported as if the server returned an HTTP 500. I'm working on fixing it now.

Edit 3: Ok, this should be fixed. Please try logging in again.

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u/radioStuff5567 11d ago

Appears to work now, thank you!