igoryonya has asked for the wisdom of the Perl Monks concerning the following question:

I am learning a Mojo::UserAgent module and I've stumbled upon an issue, that I can't find an answer to on the internet and Mojo's mans.

Here is the test code:

#!/usr/bin/env perl
use utf8;
use feature 'say';

use Mojo::UserAgent;

my $data = undef;

#Get correct file
my $cache = shift // '/tmp/cache.html';
if(-d $cache){
    die("'$cache' is folder. You need to use file.");
}

if(-e $cache){
    $data = Mojo::File->new($cache)->slurp;
}else{
    say 'Fetching fresh HTML';
    my $ua = Mojo::UserAgent->new;
    my $tx = $ua->get('https://www.mojolicious.org');
    die "Could not fetch! Error is ", $tx->result->code unless($tx->re
+sult->is_success);
    $tx->result->content->asset->move_to($cache);
    $data = $tx->result->body;    #->body is not only <body>...</body>
+, but a complete loaded resource content for 1 file.
}

say "Tags are:\n\t", Mojo::DOM->new($data)->find('a')->map(attr=>'href
+')->uniq->sort->join("\n\t");
[download]

It works, but, is there a way to list the existing attributes from a given tag?
I tried to find it out from Mojo:
:DOM
:Asset
:Content
and I didn't find any mentioning of attr enumeration or conversion to string.
Is there a way to find out what tags exist on found tag?

Something like this, probably?:

Mojo::DOM->new($data)->find('a')->map(attr=>'*')->join("\n\t");
[download]

I tried to enumerate with:

my %attrs = "Tags are:\n\t", Mojo::DOM->new($data)->attr;
map{ print "(%s)/(%s)\n", $_, $attrs{$_} } sort keys %attrs;
[download]

But I only got empty hash.

UPDATE

OK, i've figured it out:

my $dom = Mojo::DOM->new($data);
map{ say }  $dom->find('a')->first;
my $attrs = $dom->find('a')->first->attr;
map{ printf "(%s)/(%s)\n", $_, $attrs->{$_} } sort keys %$attrs;
[download]

Comment on SOLVED: Get a list attributes from a given tag in Mojo::DOM Select or Download Code

Replies are listed 'Best First'.
Re: Get a list attributes from a given tag in Mojo::DOM by Corion (Patriarch) on Jun 13, 2024 at 10:37 UTC
See `Mojo::DOM->attr`. `my $hash = $dom->attr; say $_ for keys $hash->%*; # for Perl since 5.36 say $_ for keys %$hash; # for all versions of Perl` [download]	[reply] [d/l]
Re^2: Get a list attributes from a given tag in Mojo::DOM by igoryonya (Pilgrim) on Jun 13, 2024 at 10:50 UTC
Ye, I got rusty. Forgot about hashref :) Is $dom supposed to be?: my $dom = Mojo::DOM->new($data) from my example?	[reply]
Re^3: Get a list attributes from a given tag in Mojo::DOM by Corion (Patriarch) on Jun 13, 2024 at 10:54 UTC
The "main" DOM for the whole document is `my $dom = Mojo::DOM->new($data);`. Then you likely want to `->find()` some element in it, which again is a Mojo::DOM object. I'm sure the linked documentation tells you more about the usage.	[reply] [d/l] [select]