rpm doesn't work when used with URL that's redirected

veeruk101 · 06-04-2011, 08:03 AM

If I do the following, if the URL is a redirect, it doesn't work

rpm -ivh http://path/to/rpm

I have to use wget http://path/to/rpm which resolves the redirect and downloads the file, then run rpm on that file.

More for my knowledge of bash than anything else, would there be a way to redirect the file downloaded from wget into the rpm (something like redirection or pipes or something), so that they could be combined into one command and you wouldn't explicitly save the file first.

Something like... rpm -ivh << wget http://path/to/rpm
(I'm still a relative newbie so pardon my ignorance)

I have one more question, and that is whether there is a command in linux, such as wget, that would let me pass it a URL and output the redirected-to URL if the argument.

e.g. ('wget --someflag http://orig/url' would output 'http://url-after-redirects-followed')

Shahnawaz Uqaili · 06-04-2011, 08:13 AM

What you want to install from URL?

If you are using wget http://some.com/thing/xxx/

Then it will download that package in your home directory.

smallpond · 06-05-2011, 06:08 AM

Redirection is done by a browser based on the response to the GET for the page.
Here's some perl code off the net to do redirect using the LWP::UserAgent
module, which by default will follow up to 7 levels of redirection (you can
increase that if you feel the need).

Code:

#!/usr/bin/perl
# by Tony Miller
 
use strict;
use warnings;

use LWP::UserAgent;

my $ua;  # Instance of LWP::UserAgent
my $url = $ARGV[0] || die "Usage: url.pl <url>\n";
my $req; # Instance of (original) request
my $res; # Instance of HTTP::Response returned via request method

$ua = LWP::UserAgent->new;
$ua->agent("$0/0.1 " . $ua->agent);

$req = HTTP::Request->new(HEAD => $url);
$req->header('Accept' => 'text/html');

$res = $ua->request($req) || die "Request failed for $url\n";;

if ($res->is_success) {
    print "Final URL = " . $res->request->url() . "\n";
} else {
    print "Error: " . $res->status_line . "\n";
}

example of use:

Code:

perl url.pl 'http://wikipedia.org'
Final URL = http://www.wikipedia.org/