webcal links (eg. webcal://www.domain.com/calendar.ics)will only work in Internet Explorer if Outlook 2007 is installed on the users machine. Office 2003 or earlier do not install the support required to make webcal links active.
Use a CGI proxy service on your secure site. Download CGIProxy. Upload to your sites cgi-bin folder (most hosting packages will have that set already). Once uploaded, change the permissions of the ‘nph-proxy.cgi’ file to 755 (rwxr-xr-x) Owner=Read,Write,Excute Group=Read, No Write, Excute Everyone=Read, No Write, Execute.
Visit the CGI script on your secure address: https://www.yoursite.com/cgi-bin/nph-proxy.cgi
Type in the address of the non-secure item you’re trying to show on your secure site. Uncheck “Show URL entry form”. Click “Begin Browsing”.
After the page loads, you can copy the address from the address bar, and it will be using your secure address.
Should look something like: https://www.yoursite.com/cgi-bin/nph-proxy.cgi/000000A/http/www.nonsecure-site.com/awesome-page.html
Now paste that address in your site and no more IE warning.
Best reference of all things .htaccess perishablepress
Soundcloud is a free audio third-party (a.k.a. “not my problem”) service that allows you to post, share, receive, send and download audio files with anyone, anywhere. Also allows you to manage your audio files efficiently and effectively in “the cloud”.
The iPhone Safari browser supports several extra protocols to launch their corresponding apps:
Apple documentation on iPhone integration