[SOLVED] Can curl default to using https?

Issue

I have a script which acts as a wrapper around curl: it accepts all of curl's arguments but also adds some of its own (like -H 'Content-Type: application/json'), and then it does some parsing of the output.

The problem is that curl accepts curl google.com as meaning curl http://google.com. I want to force an HTTPS connection, but I don't want to parse curl's command line to find and edit the hostname. (The user might have typed curlwrapper -H "foo: bar" -XPOST google.com -d '{"hello":"world"}')

Is there any way to tell curl "use an HTTPS connection when you're not given a URL scheme"?

Solution

HTTPS protocol for URL with missing scheme part (and thus also bypass protocol guessing mentioned in (obsolete) answer by @FatalError) can be set with option

--proto-default https

since version 7.45.0 from October 2015. See also https://github.com/curl/curl/pull/351.

It can be put into ~/.curlrc.

Example:

$ curl -v example.org
*   Trying XXXXIPv6redacted:80...
* Connected to example.org (XXXXIPv6redacted) port 80 (#0)
> GET / HTTP/1.1
...

$ curl --proto-default https -v example.org                                                             
*   Trying XXXXIPv6redacted:443...
* Connected to example.org (XXXXIPv6redacted) port 443 (#0)
* ALPN: offers h2
...

(Note that it's not a magic option to assure security. It e.g. won't affect http proxy, if set, according to the manual.)

Answered By - mykhal

Answer Checked By - David Goodson (WPSolving Volunteer)