Initial commit

.gitignore

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+vendor_perl/**
+config

LICENSE

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+MIT License
+
+Copyright (c) 2020 Sergei Fedosoff <eleksir@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# Image-dl
+
+## What is this?
+
+Image downloading tool.
+
+## What for
+
+To download images. It can be used for im clients to save images via custom plugins.
+
+## How it works
+
+Asynchronously downloads given picture.
+
+```bash
+curl -H 'url: http://server.tld/image.jpg' http://localhost:3088/image_dl
+```
+
+## How to run it
+
+As [PSGI][1] application, via [UWSGI][2].
+
+Before running this app should be bootstrapped via bootstrap.sh and [cpanm][3].
+
+Copy config_sample to config open it and edit, put there valid dir where images will be saved.
+
+```bash
+/usr/bin/uwsgi --yaml /var/www/image-dl/image-dl.yaml \
+               --psgi /var/www/image-dl/image-dl.psgi \
+               --logto /var/log/image-dl.log \
+               --pidfile /var/run/image-dl.pid \
+               --perl-local-lib /var/www/image-dl/vendor_perl
+```
+
+[1]: https://uwsgi-docs.readthedocs.io/en/latest/Perl.html
+[2]: https://github.com/unbit/uwsgi
+[3]: https://github.com/miyagawa/cpanminus

bootstrap.sh

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+#!/bin/bash
+
+cpanm -l vendor_perl --force --installdeps .
+
+# vim: set ft=sh noet ai ts=4 sw=4 sts=4:

config_sample

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+savedir = /data/imgsave

cpanfile

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+requires 'local::lib';
+requires 'IO::Socket::SSL';
+requires 'Plack::Util';
+requires 'URI::URL';
+requires 'Coro::LWP';
+requires 'LWP::Simple';

image-dl.psgi

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+use 5.018;
+use strict;
+use warnings;
+use utf8;
+use open qw(:std :utf8);
+use lib qw(./vendor_perl/lib/perl5);
+use URI::URL;
+use LWP::Simple qw(mirror);
+use Coro::LWP;
+
+open (my $ch, '<', './config') || die "No config.\n";
+my $savedir = readline $ch;
+close $ch;
+chomp $savedir;
+$savedir = (split (/\s*=\s*/, $savedir, 2))[1];
+
+my $app = sub {
+	my $env = shift;
+
+	my $msg = "Your Opinion is very important for us, please stand by.\n";
+	my $status = '404';
+	my $content = 'text/plain';
+
+	if ($env->{PATH_INFO} eq "/image_dl") {
+		my $str = $env->{HTTP_URL};
+
+		unless ((substr ($str, 0, 7) eq 'http://') || (substr ($str, 0, 8) eq 'https://')) {
+			$msg = "Incorrect URL\n";
+			return [ '400', [ 'Content-Type' => $content, 'Content-Length' => length ($msg) ], [ $msg ], ];
+		}
+
+		unless (-d $savedir) {
+			mkdir ($savedir) or do {
+				$msg = "Unable to make $savedir: $!\n";
+				return [ '500', [ 'Content-Type' => $content, 'Content-Length' => length ($msg) ], [ $msg ], ];
+			}
+		}
+
+		my $fname = $str;
+		$fname =~ s/[^\w!., -#]/_/xmsg;
+
+		if (lc ($str) =~ /\.(gif|jpe?g|png|webm|mp4)$/xms) {
+			my $savepath = sprintf '%s/%s', $savedir, $fname;
+
+			unless (-f $savepath) {
+				my $urlobj = url $str;
+				mirror ($urlobj->as_string, $savepath);
+			}
+		}
+
+		$msg = "Done\n";
+		$status = '200';
+	}
+
+
+	return [
+		$status,
+		[ 'Content-Type' => $content, 'Content-Length' => length ($msg) ],
+		[ $msg ],
+	];
+};
+
+
+__END__
+
+# vim: ft=perl noet ai ts=4 sw=4 sts=4:

image-dl.yaml

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+uwsgi:
+  http-socket: 127.0.0.1:3088
+  plugins: psgi
+  logformat: %(var.REMOTE_ADDR) %(user_id) %(var.REQUEST_METHOD) %(var.REQUEST_URI) %(var.SERVER_PROTOCOL) %(status)
+  processes: 1
+  need-app: true
+  log-reopen: yes
+  reload-mercy: 5
+  buffer-size: 32768
+  die-on-term: true
+  enable-threads: false
+  perl-exec: /dev/zero