How can I install LWP::Protocol::https?

Question

I created a Perl script to run an https task. When I run it I get the error LWP::Protocol::https not installed.

I cannot figure out, or find a tutorial or command on how exactly to install LWP::Protocol::http. Anyone have any idea how to install it? Installing LWP was quite easy.

I have installed LWP and installed Crypt-SSLeay, however I still get the error. Here is my code:

use LWP::UserAgent;

my $ua = LWP::UserAgent->new;


# set custom HTTP request header fields

my $req = HTTP::Request->new(PUT => "https://thesite.com");

$req->header('Authorization' => 'myauth');
$req->header('Accept' => 'JSON:Application/JSON');
$req->header('Content-Type' => 'JSON:Application/JSON');
$req->header('Host' => 'api.thesite.com');

$req->content('Text' => 'thetext');



my $resp = $ua->request($req);
if ($resp->is_success) {
    my $message = $resp->decoded_content;
    print "Received reply: $message\n";
}
else {
    print "HTTP POST error code: ", $resp->code, "\n";
    print "HTTP POST error message: ", $resp->message, "\n";
}

If the error tells you `LWP::Protocol::https` is not installed, install it. — ThisSuitIsBlackNot, Jan 14 '14 at 20:47
Oh geesh. It's been a bad day. I need to edit this question. I got so caught up, I didn't as the right thing... — CRAIG, Jan 14 '14 at 20:49
The question was supposed to be... HOW do I install it. I can't seem to find that information anywhere. — CRAIG, Jan 14 '14 at 20:51
`cpan` then `install LWP::Protocol::https` or `install Bundle::LWP` — Elliott Frisch, Jan 14 '14 at 20:51
See: [What's the easiest way to install a missing Perl module?](http://stackoverflow.com/questions/65865/whats-the-easiest-way-to-install-a-missing-perl-module) — ThisSuitIsBlackNot, Jan 14 '14 at 20:52
Man, I thought I tried that. Ok, very good. It is installing now. Thanks so much for the quick help!! — CRAIG, Jan 14 '14 at 20:54

score 23 · Answer 1 · answered Feb 14 '18 at 08:38

23

sudo yum install perl-LWP-Protocol-https fixed issue for me.

answered Feb 14 '18 at 08:38

Chathuranga Abeyrathna

779
1
7
17

score 12 · Answer 2 · answered Nov 04 '16 at 12:23

12

Running sudo cpan install LWP::Protocol::https fixed this for me.

answered Nov 04 '16 at 12:23

FCTW

225
3
10

1

`sudo perl -MCPAN -we 'install "LWP::Protocol::https"'` didn't worked because some test failed, and your command worked. THANK YOU SO MUCH! – yannis Feb 17 '20 at 17:27
Note that the "install" in that command is a no-op. Just `cpan LWP::Protocol::https` is what you need. – brian d foy Oct 11 '21 at 13:18

score 0 · Answer 3 · edited Nov 30 '21 at 02:28

0

If you get this error:

Can't locate LWP/Protocol/https.pm in @INC (@INC contains: /etc/cxs /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at (eval 5) line 2.

You need to install LWP::Protocol::https, using for instance:

cpan LWP::Protocol::https

edited Nov 30 '21 at 02:28

brian d foy

129,424
31
207
592

answered Nov 28 '21 at 17:42

Mohammad Reza Rohani

1

brian d foy · Answer 4 · 2023-07-05T13:36:30.540

A long time ago, LWP came with HTTPS support. Then, in 6.02 (in 2011), they unbundled the LWP::Protocol::https. If your program was set up on an ancient system and you are upgraded, this change can trip you up.

Since Perl does not have SSL support out of the box, it didn't make sense to have a protocol helper that was missing what it needs (and remember HTTPS everywhere wasn't quite as prevalent then). As a separate module, it's easier to get everything set up.

Now, here's the trick. LWP::Protocol::https needs IO::Socket::SSL which needs Net::SSLeay which needs openssl. How you install that is up to you, and if your platform has a ready-to-go package, that might be best (because if you know you don't want that, you're unlikely to ask your question).

If you want to do the whole chain yourself, start with openssl. Once that's sorted, you can install the module you need and the rest of the pre-requisites will take care of themselves:

# ... install openssl, set env vars if in a nonstandard location
% cpan LWP::Protocol::https

As a side note, older Perl practices didn't include using all the modules you knew you depended on. In this case, you formerly didn't declare a dependency on LWP::Protocol::https because you knew it came with LWP. Now it's much better to explicitly declare every thing you need even if you know some modules come in the same distribution. Maybe some time in the future they'll be in different distributions.

Although I use Mojo::UserAgent for all this now, I'd add the explicit dependency even though LWP takes care of it all internally. This makes static analysis a bit easier:

use LWP;
use LWP::Protocol::https;

Is there a chance to install LWP 6.01 or earler (version before unbundling the LWP::Protocol::https from LWP distribution)? — AntonioK, Jul 01 '23 at 14:26
libwww-perl-6.01 is still available for download: https://metacpan.org/release/GAAS/libwww-perl-6.01 — AntonioK, Jul 01 '23 at 14:34

How can I install LWP::Protocol::https?

4 Answers4