mojo app causes weird morbo loop that stops when app is loaded

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

What could cause a Mojolicious::Lite app started with morbo to continuously reload for no apparent reason, as if it was receiving requests, until it gets an actual request? For example, these 9 lines repeat over and over until the app is loaded in a browser, then it stops spewing these lines and works as expected:

Web application available at http://127.0.0.1:3000

GET "/"
Routing to a callback
200 OK (0.204005s, 4.902/s)
GET "/%3C!DOCTYPE%20html%3E%3Chead%3E ...
Template "not_found.development.html.ep" not found
Template "not_found.html.ep" not found
Rendering template "mojo/debug.html.ep"
Your secret passphrase needs to be changed (see FAQ for more)
404 Not Found (0.017273s, 57.894/s)
[download]

That 4th line is somehow appending a string of html, which the app builds up and renders, to a get request. I have no idea how that's happening at all, let alone autonomously without loading it in a browser. This is an old working app with no known problems. After restarting morbo a few times all is well, and I can't reproduce it, but am curious if this is a known issue when someone like me does something stupid with the code? Thanks

Tonight at 11...DOOOOOOOOOOOOOOOM!

Comment on mojo app causes weird morbo loop that stops when app is loaded Download Code

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Re: mojo app causes weird morbo loop that stops when app is loaded by Corion (Patriarch) on May 21, 2024 at 07:39 UTC
Without seeing relevant code of the app, I would suspect a browser plugin or something like that. To better diagnose the source of these bogus requests, consider launching the app on a port that your browser(s) have not seen yet. If the requests still appear, then it is your app itself that issues that request (or some misconfigured other software maybe, trying a health check). I would then dump the IP address of the incoming request. I would also look through the code for calls to the application, either through Mojo::UserAgent or `app->...`.	[reply] [d/l]
Re: mojo app causes weird morbo loop that stops when app is loaded by bliako (Abbot) on May 21, 2024 at 06:40 UTC
`GET "/%3C!DOCTYPE%20html%3E%3Chead%3E ...` from the above it looks like your app is GETting the contents of an HTML file: `<!DOCTYPE html><head> ...` ps. sorry i now saw that you mentioned this in your post	[reply] [d/l] [select]
Re^2: mojo app causes weird morbo loop that stops when app is loaded by Anonymous Monk on May 21, 2024 at 19:38 UTC
`GET "/%3C!DOCTYPE%20html%3E%3Chead%3E ...` from the above it looks like your app is GETting the contents of an HTML file: <!DOCTYPE html><head> ... It's crazy right? I thought that might be a clue, but I don't have one yet. The second automatic get request is somehow asking for the contents of a string $html which the program builds as it runs and finally renders with `$r->render(text=>$html)`.	[reply]