Check https connection open

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

Dear Monks,
I have a web service written in Perl/CGI which I place on different servers including local where I do development.
Production ones have https certified connection for login/registration.
How can I check that https is open automatically in order to place right action URL in the login form (HTTPS://myservice.... instead of a regular one HTTP://.....)?
In other words I want to put a right $action in

<form name="query_form" action=$action method="POST"
[download]

Comment on Check https connection open Download Code

Replies are listed 'Best First'.
Re: Check https connection open by BrowserUk (Patriarch) on Jun 16, 2011 at 15:25 UTC
Total speculation: couldn't you try opening a port to localhost:443 and decide upon the success or failure of that? Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice.	[reply]
Re: Check https connection open by Mr. Muskrat (Canon) on Jun 16, 2011 at 15:41 UTC
Have you tried leaving the scheme off of the URI? Something like '//myservice....'? That's how I've done it before. If you access the page with http, you get http. If you access the page with https, you get https.	[reply]
Re: Check https connection open by dorko (Prior) on Jun 16, 2011 at 14:08 UTC
Hello, If I understand your question, you could fetch a known good URL on the server in question using HTTPS. If the HTTPS fetch succeeds, then have the URLs in your program use HTTPS. If a HTTPS fetch fails, you can quit the program, or do something else to find out what is going on (like checking HTTP, etc.) Cheers, Brent -- Yeah, I'm a Delt.	[reply]
Re: Check https connection open by Anonymous Monk on Jun 16, 2011 at 14:15 UTC
How can I check that https is open automatically in order to place right action URL in the login form (HTTPS://myservice.... instead of a regular one HTTP://.....)? What does "check that https is open automatically" mean? If you use relative urls/action, visiting https, remains on https	[reply]
Re^2: Check https connection open by vit (Friar) on Jun 16, 2011 at 14:57 UTC
I want to use HTTPS in my site url when it is available and HTTP when it is not. On our production server we opened a special port in Amazon EC2 for HTTPS secure communication, whereas on my local server I don't have it. So I want to form a right action automatically without manually changing to http on my local server and back to https on production server in my code. In other words I want to put a right $action in `<form name="query_form" action=$action method="POST"` [download]	[reply] [d/l]