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[tech] Funny endless redirection

Luke Emmet luke at marmaladefoo.com

Sat Jan 16 11:04:26 GMT 2021

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On 16-Jan-2021 10:51, Luke Emmet wrote:

On 16-Jan-2021 09:58, Stephane Bortzmeyer wrote:
The capsule gemini.marmaladefoo.com has a funny
redirection. <gemini://gemini.marmaladefoo.com/geminaut?name=gerald>
redirects to <gemini://gemini.marmaladefoo.com/geminaut?name=gerald/>
which redirects to
<gemini://gemini.marmaladefoo.com/geminaut?name=gerald//> and so on
until you run out of slashes :-)
Hmm - there is something strange about that URL - it might be molly
brown redirecting. I'll investigate.
Yes - it seems to be a molly brown bug.

If you take a valid URL that references a folder not having a trailing slash, and add a query to it, molly brown goes off on an endless redirect.

For example, try this one:

gemini://gemini.circumlunar.space/capcom?foo

1. Here the "capcom" folder exists with an index.gmi therein2. Molly brown thereby puts a slash on the end of the URL, but what it should do is put a slash after the capcom maybe, thus

gemini://gemini.circumlunar.space/capcom/?foo

not

gemini://gemini.circumlunar.space/capcom?foo/

in this second case, molly brown will redirect again to

gemini://gemini.circumlunar.space/capcom?foo//

and so on.

I'll let solderpunk know.

In the mean time, I suggest not to construct strange parameterised URLs to folder URLs on molly brown!

 - Luke