[tech] Funny endless redirection

Since we have no list tag for operational issues, I guess that [tech] is OK. 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 :-) May be it will reactivate the discussion on a way to get the contact of a capsule, to report issues.

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. But anyway, the URL is not a valid one - were you just playing around or did you follow a link from somewhere that linked to that URL? There is a CGI demo here gemini://gemini.marmaladefoo.com/cgi-bin/hello-world.cgi where you can put your name, e.g. gemini://gemini.marmaladefoo.com/cgi-bin/hello-world.cgi?name=gerald > May be it will reactivate the discussion on a way to get the contact > of a capsule, to report issues. There is an email address for yours truly on the root page of the capsule! ?- Luke

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 therein 2. 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

On Sat, Jan 16, 2021 at 10:51:54AM +0000, Luke Emmet <luke at marmaladefoo.com> wrote a message of 28 lines which said: > But anyway, the URL is not a valid one - were you just playing > around or did you follow a link from somewhere that linked to that > URL? Following a link. (Unfortunately, Lupa does not register where did the URL in its database comes from.)

On 16-Jan-2021 11:04, Stephane Bortzmeyer wrote >> But anyway, the URL is not a valid one - were you just playing >> around or did you follow a link from somewhere that linked to that >> URL? > Following a link. (Unfortunately, Lupa does not register where did the > URL in its database comes from.) For client authors, there is also the recommendation in the Gemini "best practices" doc to not automatically follow more than N (suggested N=5) redirects. This would prevent getting stuck in any intentional or inadvertent redirect tar pits that await. I think there is are some intentional infinite redirect loops in the client torture tests as well as the usual inadvertent server or CGI bugs out in the geminiverse. gemini://gemini.circumlunar.space/docs/best-practices.gmi ?- Luke

On Sat, Jan 16, 2021 at 10:51:54AM +0000, Luke Emmet <luke at marmaladefoo.com> wrote a message of 28 lines which said: > > May be it will reactivate the discussion on a way to get the contact > > of a capsule, to report issues. > There is an email address for yours truly on the root page of the capsule! It's also that your email server denylists mine: <luke at marmaladefoo.com>: host mx2.mythic-beasts.com[2a00:1098:0:82:1000:0:2:1] said: 550 Block listed: https://www.spamhaus.org/sbl/query/SBLCSS (in reply to MAIL FROM command)

On Sat, Jan 16, 2021 at 11:04:26AM +0000, Luke Emmet <luke at marmaladefoo.com> wrote a message of 47 lines which said: > Yes - it seems to be a molly brown bug. A side effect of crawlers is that they exercice a lot of code and find many bugs that would not have been detected by normal use :-)