added "3.12 Why do FTP specific features over HTTP proxy fails?"

Updated: August 23, 2001 (http://curl.haxx.se/docs/faq.shtml)

Updated: October 23, 2001 (http://curl.haxx.se/docs/faq.shtml)

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  3.9 How do I use curl in PHP, Perl, Tcl, Ruby or Java?

  3.10 What about SOAP, WebDAV, XML-RPC or similar protocols over HTTP?

  3.11 How do I POST with a different Content-Type?

  3.12 Why do FTP specific features over HTTP proxy fails?

 4. Running Problems

  4.1 Problems connecting to SSL servers.

        curl -d "datatopost" -H "Content-Type: text/xml" [URL]

  3.12 Why do FTP specific features over HTTP proxy fails?

  Because when you use a HTTP proxy, the protocol spoken on the network will

  be HTTP, even if you specify a FTP URL. This effectively means that you

  normally can't use FTP specific features such as ftp upload and ftp quote

  etc.

  There is one exception to this rule, and that is if you can "tunnel through"

  the given HTTP proxy. Proxy tunneling is enabled with a special option (-P)

  and is generally not available as proxy admins usuable disable tunneling to

  other ports than 443 (which is used for HTTPS access through proxies).

4. Running Problems

  4.1. Problems connecting to SSL servers.