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#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - scripts/getremotecpmove                 Copyright 2022 cPanel, L.L.C.
#                                                           All rights reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

package scripts::getremotecpmove;

use cPstrict;
no warnings;    ## no critic qw(ProhibitNoWarnings)

use Socket                    ();
use MIME::Base64              ();
use Cpanel::Carp              ();
use Cpanel::Encoder::Tiny     ();
use Cpanel::Encoder::URI      ();
use Cpanel::MD5               ();
use Cpanel::FileUtils::Open   ();
use Cpanel::Filesys::Home     ();
use Cpanel::Locale            ();
use Cpanel::HTTP::Client      ();
use Cpanel::RemoteAPI::cPanel ();
use Cpanel::Version::Compare  ();

local $| = 1;

my $locale = Cpanel::Locale->get_handle();

__PACKAGE__->script(@ARGV);

sub script {
    my ( $self, @args ) = @_;

chdir("/usr/local/cpanel/scripts");

my $host = $args[0];
    my $user = $args[1];

$host =~ s/\///g;
    $user =~ s/\///g;
    $host =~ s/\.\.//g;
    $user =~ s/\.\.//g;
    my $pass = <STDIN>;
    $pass =~ s/\n//g;

$host = "[$host]" if $host =~ tr{:}{};

if ( !length $pass ) {
        print $locale->maketext( "This utility requires that the account password be sent over “[_1]”.", 'STDIN' );
        exit(1);
    }

my $part = Cpanel::Filesys::Home::get_homematch_with_most_free_space() || '/home';

my @PKGDEBUG;
    my ( $fetch_ok, $archive_file, $extractdir, $md5sum, $pkgdebug ) = fetch_acct_by_cpanel( 'user' => $user, 'host' => $host, 'pass' => $pass, 'part' => $part );
    push @PKGDEBUG, $pkgdebug;

if ( !$fetch_ok ) {
        print "Failed to fetch cpmove file via cPanel API.\n";
        exit(1);
    }

if ($fetch_ok) {
        if ($md5sum) {
            my $newmd5 = Cpanel::MD5::getmd5sum($archive_file);
            if ( $newmd5 eq $md5sum ) {
                print "Checksum Matches!\n";
            }
            else {
                print "Checksum Failure [[$newmd5]] [[$md5sum]]…trace information follows…<table width=\"100%\" style=\"border: 1px #000 solid;\"><tr><td><pre>" . join( "\n\n\n", @PKGDEBUG ) . "</pre></td></tr></table>\n\n";
                exit(1);
            }
        }
        elsif ( -z $archive_file ) {
            print "Checksum Failure: Failed to download account file.\n";
            exit(1);
        }
        print "extract dir name is: $extractdir\n";
        print "pkgacctfile is: $archive_file\n";
        print "MOVE IS GOOD!\n";
        exit(0);
    }
    else {
        print "Failed to fetch account via cpanel and ftp/web\n";
        exit(1);
    }
}

my $ua;

sub _ua {
    return $ua ||= Cpanel::HTTP::Client->new( verify_SSL => 0 );
}

my $api;

sub _api ( $host, $user, $pass ) {
    return $api ||= Cpanel::RemoteAPI::cPanel->new_from_password(
        $host,
        $user => $pass,
    )->disable_tls_verify();
}

sub _can_fullbackup_to_homedir ($api) {
    my $MIN_VERSION = '77';

my $version = eval { $api->get_cpanel_version_or_die };

return 0 unless defined $version;

return Cpanel::Version::Compare::compare( $version, '>=', $MIN_VERSION );
}

sub fetch_acct_by_cpanel {    ## no critic qw(ExcessComplexity) - TODO
    my %OPTS                  = @_;
    my $host                  = $OPTS{'host'};
    my $user                  = $OPTS{'user'};
    my $pass                  = $OPTS{'pass'};
    my $filesystem_target_dir = $OPTS{'part'};

print "Trying to fetch cpmove file via cPanel API!\n";

my $api = _api( $host, $user, $pass );

require MIME::Base64;
    print $locale->maketext("Fetching current backups from remote server …");
    my ( $login_ok, $current_resp_data, $current_bck_ref ) = get_current_backups($api);
    return 0 if !$login_ok;
    print "    " . $locale->maketext( "[quant,_1,backup,backups] found.", ( scalar keys %$current_bck_ref ) );
    print "\n";
    print $locale->maketext(" … done.") . "\n";

foreach my $bck ( keys %$current_bck_ref ) {
        if ( $current_bck_ref->{$bck} ) {
            print $locale->maketext( "A backup to the file “[_1]” is currently in progress on the remote server.", $bck ) . "\n";
            print $locale->maketext("Please wait until it is complete and try again.") . "\n";
            exit(1);
        }
    }

print $locale->maketext("Starting the backup …") . "\n";

if ( _can_fullbackup_to_homedir($api) ) {

# start the backup
        my $result = $api->request_uapi(
            'Backup', 'fullbackup_to_homedir',
            {

# If the remote is pre-v88 it’ll just ignore this parameter,
                # so we don’t need a version check here.
                dbbackup_mysql => 'schema',

# Same situation as “dbbackup_mysql”, but for v94.
                homedir => 'skip',
            },
        );

if ( $result->status() ) {
            my $pid = $result->data()->{'pid'};

print "Remote backup started (PID $pid)\n";
        }
        else {
            die "Failed to start backup on $host as $user: " . $result->errors_as_string();
        }
    }
    else {
        my $resp     = _ua()->request( 'GET', "https://$host:2083/json-api/cpanel?cpanel_jsonapi_module=Fileman&cpanel_jsonapi_func=fullbackup&cpanel_jsonapi_apiversion=1", { headers => { Authorization => 'Basic ' . MIME::Base64::encode( "$user:$pass", '' ) } } );
        my $page     = $resp->{'content'};
        my $response = "$resp->{'status'} $resp->{'reason'}";

unless ( $resp->{'success'} ) {
            die "Failed to start backup on $host as $user: $resp->{'status'} $resp->{'reason'}";
        }
    }

# Having started the backup, we now look for a new cpmove file. The file
    # is built in-place. This file will, when it’s finished, be the new
    # account archive that we’ll download.

my ( $backup_file, $new_resp_data, $new_bck_ref );
  FIND:
    for ( 1 .. 10 ) {
        print $locale->maketext("Waiting for backup to start …") . "\n";
        sleep(5);
        print $locale->maketext(" … done.") . "\n";

print $locale->maketext("Checking remote server for backups …");
        ( $login_ok, $new_resp_data, $new_bck_ref ) = get_current_backups($api);
        return 0 if !$login_ok;
        print "    " . $locale->maketext( "[quant,_1,backup,backups] found.", ( scalar keys %$new_bck_ref ) );
        print "\n";
        foreach my $back ( keys %{$new_bck_ref} ) {
            if ( !exists $current_bck_ref->{$back} ) {
                $backup_file = $back;
                last FIND;
            }
        }
    }

if ( !$backup_file ) {
        print "Failed to retrieve the backup from the remote machine (if a previous backup is in progress you will need to wait until it is complete)!\n";
        print "(Trace information follows for initial backups)…<table width=\"100%\" style=\"border: 1px #000 solid;\"><tr><td><pre>" . _convert_response_data_to_trace_html($current_resp_data) . "</pre></td></tr></table>\n";
        print "(Trace information follows for backups after request started)…<table width=\"100%\" style=\"border: 1px #000 solid;\"><tr><td><pre>" . _convert_response_data_to_trace_html($new_resp_data) . "</pre></td></tr></table>\n";
        return 0;
    }

print $locale->maketext( "The remote server is creating the backup file “[_1]”.", $backup_file ) . "\n";
    print $locale->maketext("Starting wait cycle for remote backup.") . "\n";
    my $bck_ref;
    my $MAX_POLL = 1440;    # AKA about 24 hours
    for my $attempt ( 1 .. $MAX_POLL ) {
        print $locale->maketext( "Polling remote server (Attempt [numf,_1]/[numf,_2]) …", $attempt, $MAX_POLL ) . "\n";

( $login_ok, undef, $bck_ref ) = get_current_backups($api);
        return 0 if !$login_ok;

if ( exists $bck_ref->{$backup_file} ) {
            if ( !$bck_ref->{$backup_file} ) {
                last;
            }
            else {
                print $locale->maketext( "The backup file, [_1], is still being generated on the remote server “[_2]”.", $backup_file, $host ) . "\n";
                print "…60…\n";
                sleep(15);
                print "…45…\n";
                sleep(15);
            }
        }
        else {
            print $locale->maketext( "The backup file “[_1]” unexpectedly disappeared from the remote server “[_2]”.", $backup_file, $host ) . "\n";
            return 0;
        }
        print "…30…\n";
        sleep(15);
        print "…15…\n";
        sleep(15);
    }

print $locale->maketext( "Downloading “[_1]” …", $backup_file ) . "\n";

chdir($filesystem_target_dir) || return 0;

my $now = time();
    my $out_fh;
    my $dest = "cpmove-$user-$now.tmp";
    if ( !Cpanel::FileUtils::Open::sysopen_with_real_perms( $out_fh, $dest, 'O_WRONLY|O_TRUNC|O_CREAT', 0600 ) ) {
        print "Could not open output file, “$dest” for download.\n";
        return 0;
    }

my $new_percent;
    my ( $cl, $cc );
    my $percent;
    my $bytesread = 0;
    my $resp      = _ua()->request(
        'GET',
        "https://$host:2083/download/$backup_file",
        {
            headers => {
                Authorization => 'Basic ' . MIME::Base64::encode( "$user:$pass", '' ),
            },
            data_callback => sub {
                my ( $data, $resp ) = @_;
                my $headers = $resp->{'headers'};
                if ( !defined $cl ) {
                    if ( $headers->{'content-type'} =~ m/text/i ) {
                        print "Could not download backup file; security policy on the remote server forbids it.\n";
                        die;
                    }
                    if ( $headers->{'content-length'} =~ /^\d+$/ ) {
                        $cl = $headers->{'content-length'};
                    }
                }

$bytesread += length $data;
                $cc++;
                if ( $cc == 170 && $cl ) {
                    my $new_percent = int( ( $bytesread / $cl ) * ( $cl == 1 ? 1 : 100 ) );
                    if ( $new_percent != $percent ) {
                        $percent = $new_percent;
                        print "..${percent}" . ( $cl == 1 ? '' : '%' ) . "..\n";
                    }
                    $cc = 0;
                }
                print {$out_fh} $data;
            },
        }
    );
    my $page = $resp->{content};
    if ( !$resp->{success} ) {
        print $locale->maketext( "Could not connect to “[_1]” on port 2083 because of an error: [_2]", $host, "$resp->{status} $resp->{reason}" ) . "\n";
        return 0;
    }

close($out_fh);
    print " … done.\n";

my $extractdir = $backup_file;
    $extractdir =~ s/(\.tar)?(\.gz)?$//g;

# We are chdired to $filesystem_target_dir at this point
    system( '/bin/mv', '-f', '--', $dest, "cpmove-$user-$now.tar.gz" );

return ( 1, "$filesystem_target_dir/cpmove-$user-$now.tar.gz", $extractdir, '', '' );
}

sub get_current_backups ($api) {

#look for backups
    my %CURRENT_BACKUPS;

my $resp = $api->request_api2( 'Backups', 'listfullbackups' );

if ( my $err = $resp->{'error'} ) {
        my $hostname = $api->get_hostname();
        print Cpanel::Encoder::Tiny::safe_html_encode_str("cPanel login on $hostname failed: $err");
        return ( 0, [], {} );
    }

for my $item_hr ( $resp->{'data'}->@* ) {
        my $is_in_progress = $item_hr->{'status'} =~ m<progress>i;

$CURRENT_BACKUPS{ $item_hr->{'file'} } = $is_in_progress ? 1 : 0;
    }

return ( 1, $resp->{'data'}, \%CURRENT_BACKUPS );
}

# NOTE: This function is pulled from Cpanel::Backups::listfullbackups and is used to preserve
#       pre-existing functionality which would dump the cpapi1 HTML response as part of the
#       trace information when the script failed to retrieve a backup file from the remote server
sub _convert_response_data_to_trace_html ($response_data) {

my $html;

foreach my $bck_ref (@$response_data) {
        my $html_safe_file = Cpanel::Encoder::Tiny::safe_html_encode_str( $bck_ref->{'file'} );
        my $uri_safe_file  = Cpanel::Encoder::URI::uri_encode_str( $bck_ref->{'file'} );
        if ( $bck_ref->{'status'} eq 'complete' ) {
            $html .= qq(<div class="okmsg"><b><a href="$ENV{'cp_security_token'}/download?file=$uri_safe_file">$html_safe_file</a></b> ($bck_ref->{'localtime'})<br /></div>\n);
        }
        elsif ( $bck_ref->{'status'} eq 'inprogress' ) {
            $html .= qq(<div class="warningmsg">$html_safe_file ($bck_ref->{'localtime'}) [in progress]<br /></div>\n);
        }
        else {
            $html .= qq(<div class="errormsg">$html_safe_file ($bck_ref->{'localtime'}) [failed, timeout]<br /></div>\n);
        }

}

return $html;
}