Io: Protocol 'https' unsupported

Question

I am trying to fetch a file over HTTPS in Io language:

url := URL with("https://api.example.com")
url fetch println

And I get this:

 Error_0x7f97e1509a80:
  location         = "/opt/local/lib/io/addons/Socket/io/URL.io:232"
  message          = "Protocol 'https' unsupported"

I was trying to find something on the net, but, as everybody knows, it's not easy because of the name. I only found this thread http://tech.groups.yahoo.com/group/iolanguage/message/10898 but that's quite old.

How can I get the HTTPS support in Io?

EDIT

I've found that there is a SecureSocket addon, a wrapper over OpenSSL, in Io's source. It wasn't installed when I did sudo port io install on my MacBook with Mountain Lion, though. I tried building it from source, but no luck. It didn't build for me on a Linux machine, either.

EDIT2

I just tried to build Io from source (git clone https://github.com/stevedekorte/io.git) again (using the included script build.sh) and it turned out that cmake did detect OpenSSL:

 -- Found OpenSSL: /usr/lib/libssl.dylib;/usr/lib/libcrypto.dylib  

But then the SecureSocket addon is not built. Its readme file: https://github.com/stevedekorte/io/tree/master/addons/SecureSocket says:

The DTLS1 bindings are not usable unless the patches in this file are applied to OpenSSL 0.9.8e. However, this patch includes a deactivation of the handshake retransmission code in d1_both.c, making it unsuitable for production environments. I take no responsibility, etc, etc. If you want to use it anyway, apply the patches(gathered from various newsgroups and my own experimentation) and uncomment the commented-out block of build.io. For what it's worth, DTLS support in OpenSSL is new as of 0.9.8 and is pretty buggy to begin with. It's a nice idea, but it doesn't seem to be production ready at all yet. These bindings are no exception.

Answer 1

If you can't get io to do it your best option would be calling an external tool like wget or curl which can and then loading the file/result locally or returning it via a pipe.