package urpm::mirrors; # $Id: $ use strict; use urpm::util; use urpm::msg; use urpm::download; =head1 NAME urpm::mirrors - Mirrors routines for urpmi =head1 SYNOPSIS =head1 DESCRIPTION =over =cut #- $medium fields used: mirrorlist, with-dir #- side-effects: $medium->{url} #- + those of _pick_one ($urpm->{mirrors_cache}) sub try { my ($urpm, $medium, $try) = @_; for (my $nb = 1; $nb < $urpm->{options}{'max-round-robin-tries'}; $nb++) { my $url = _pick_one($urpm, $medium->{mirrorlist}, $nb == 1, '') or return; $urpm->{info}(N("trying again with mirror %s", $url)) if $nb > 1; $medium->{url} = _add__with_dir($url, $medium->{'with-dir'}); $try->() and return 1; black_list($urpm, $medium->{mirrorlist}, $url); } 0; } #- similar to try() above, but failure is "normal" #- (useful when we lookup a file) #- #- $medium fields used: mirrorlist, with-dir #- side-effects: $medium->{url} #- + those of list_urls ($urpm->{mirrors_cache}) sub try_probe { my ($urpm, $medium, $try) = @_; my $nb = 0; foreach my $mirror (map { @$_ } list_urls($urpm, $medium, '')) { $nb++ < $urpm->{options}{'max-round-robin-probes'} or last; my $url = $mirror->{url}; $nb > 1 ? $urpm->{info}(N("trying again with mirror %s", $url)) : $urpm->{log}("using mirror $url"); $medium->{url} = _add__with_dir($url, $medium->{'with-dir'}); $try->() and return 1; } 0; } #- side-effects: none sub _add__with_dir { my ($url, $with_dir) = @_; reduce_pathname($url . ($with_dir ? "/$with_dir" : '')); } #- side-effects: $medium->{url} #- + those of _pick_one ($urpm->{mirrors_cache}) sub pick_one { my ($urpm, $medium, $allow_cache_update) = @_; my $url = _pick_one($urpm, $medium->{mirrorlist}, 'must_succeed', $allow_cache_update); $medium->{url} = _add__with_dir($url, $medium->{'with-dir'}); } #- side-effects: #- + those of _pick_one_ ($urpm->{mirrors_cache}) sub list_urls { my ($urpm, $medium, $allow_cache_update) = @_; my @l = split(' ', $medium->{mirrorlist}); map { my $cache = _pick_one_($urpm, $_, $allow_cache_update, $_ ne $l[-1]); $cache ? $cache->{list} : []; } @l; } #- side-effects: $urpm->{mirrors_cache} sub _pick_one { my ($urpm, $mirrorlists, $must_succeed, $allow_cache_update) = @_; my @l = split(' ', $mirrorlists); foreach my $mirrorlist (@l) { if (my $cache = _pick_one_($urpm, $mirrorlist, $allow_cache_update, $mirrorlist ne $l[-1])) { if ($cache->{nb_uses}++) { $urpm->{debug} and $urpm->{debug}("using mirror $cache->{chosen}"); } else { $urpm->{log}("using mirror $cache->{chosen}"); } return $cache->{chosen}; } } $must_succeed and $urpm->{fatal}(10, N("Could not find a mirror from mirrorlist %s", $mirrorlists)); undef; } #- side-effects: $urpm->{mirrors_cache} sub _pick_one_ { my ($urpm, $mirrorlist, $allow_cache_update, $set_network_mtime) = @_; my $cache = _cache__may_clean_if_outdated($urpm, $mirrorlist, $allow_cache_update); if (!$cache->{chosen}) { if (!$cache->{list}) { if (_is_only_one_mirror($mirrorlist)) { $cache->{list} = [ { url => $mirrorlist } ]; } else { $cache->{list} = [ _list($urpm, $mirrorlist) ]; } $cache->{time} = time(); # the cache will be deemed outdated if network_mtime is more recent than the cache's $cache->{network_mtime} = _network_mtime() if $set_network_mtime; $cache->{product_id_mtime} = _product_id_mtime(); } if (-x '/usr/bin/rsync') { $cache->{chosen} = $cache->{list}[0]{url}; } else { my $m = find { $_->{url} !~ m!^rsync://! } @{$cache->{list}}; $cache->{chosen} = $m->{url}; } $cache->{chosen} or return; _save_cache($urpm); } $cache; } #- side-effects: $urpm->{mirrors_cache} sub black_list { my ($urpm, $mirrorlists, $url) = @_; foreach my $mirrorlist (split ' ', $mirrorlists) { my $cache = _cache($urpm, $mirrorlist); if ($cache->{list}) { @{$cache->{list}} = grep { $_->{url} ne $url } @{$cache->{list}}; } delete $cache->{chosen}; } } sub _trigger_cache_update { my ($urpm, $cache, $o_is_upgrade) = @_; my $reason = $o_is_upgrade ? "reason=upgrade" : "reason=update"; $urpm->{log}("URPMI_ADDMEDIA_REASON $reason"); $ENV{URPMI_ADDMEDIA_REASON} = $reason; %$cache = (); } #- side-effects: #- + those of _cache ($urpm->{mirrors_cache}) sub _cache__may_clean_if_outdated { my ($urpm, $mirrorlist, $allow_cache_update) = @_; my $cache = _cache($urpm, $mirrorlist); if ($allow_cache_update) { if ($cache->{network_mtime} && _network_mtime() > $cache->{network_mtime}) { $urpm->{log}("not using cached mirror list $mirrorlist since network configuration changed"); _trigger_cache_update($urpm, $cache); } elsif ($cache->{time} && time() > $cache->{time} + 24*60*60 * $urpm->{options}{'days-between-mirrorlist-update'}) { $urpm->{log}("not using outdated cached mirror list $mirrorlist"); _trigger_cache_update($urpm, $cache); } elsif (!$cache->{product_id_mtime}) { $urpm->{log}("cached mirror list uses an old format, invalidating it"); _trigger_cache_update($urpm, $cache, 1); } elsif ($cache->{product_id_mtime} && _product_id_mtime() != $cache->{product_id_mtime}) { $urpm->{log}("not using cached mirror list $mirrorlist since product id file changed"); _trigger_cache_update($urpm, $cache, 1); } } $cache; } #- side-effects: $urpm->{mirrors_cache} sub _cache { my ($urpm, $mirrorlist) = @_; my $full_cache = $urpm->{mirrors_cache} ||= _load_cache($urpm); $full_cache->{$mirrorlist} ||= {}; } sub cache_file { my ($urpm) = @_; "$urpm->{cachedir}/mirrors.cache"; } sub _load_cache { my ($urpm) = @_; my $cache; if (-e cache_file($urpm)) { $urpm->{debug} and $urpm->{debug}("loading mirrors cache"); $cache = eval(cat_(cache_file($urpm))); $@ and $urpm->{error}("failed to read " . cache_file($urpm) . ": $@"); $_->{nb_uses} = 0 foreach values %$cache; } if ($ENV{URPMI_ADDMEDIA_PRODUCT_VERSION} && delete $cache->{'$MIRRORLIST'}) { $urpm->{log}('not using cached mirror list $MIRRORLIST since URPMI_ADDMEDIA_PRODUCT_VERSION is set'); } $cache || {}; } sub _save_cache { my ($urpm) = @_; require Data::Dumper; my $s = Data::Dumper::Dumper($urpm->{mirrors_cache}); $s =~ s/.*?=//; # get rid of $VAR1 = output_safe(cache_file($urpm), $s); } #- side-effects: none sub _list { my ($urpm, $mirrorlist) = @_; my @mirrors = _mirrors_filtered($urpm, _expand($mirrorlist)); add_proximity_and_sort($urpm, \@mirrors); @mirrors; } sub _expand { my ($mirrorlist) = @_; # expand the variables if ($mirrorlist eq '$MIRRORLIST') { _MIRRORLIST(); } else { require urpm::cfg; urpm::cfg::expand_line($mirrorlist); } } #- side-effects: $mirrors sub add_proximity_and_sort { my ($urpm, $mirrors) = @_; my ($latitude, $longitude, $country_code); require Time::ZoneInfo; if (my $zone = Time::ZoneInfo->current_zone) { if (my $zones = Time::ZoneInfo->new) { if (($latitude, $longitude) = $zones->latitude_longitude_decimal($zone)) { $country_code = $zones->country($zone); $urpm->{log}(N("found geolocalisation %s %.2f %.2f from timezone %s", $country_code, $latitude, $longitude, $zone)); } } } defined $latitude && defined $longitude or return; foreach (@$mirrors) { $_->{latitude} || $_->{longitude} or next; my $PI = 3.14159265358979; my $x = $latitude - $_->{latitude}; my $y = ($longitude - $_->{longitude}) * cos($_->{latitude} / 180 * $PI); $_->{proximity} = sqrt($x * $x + $y * $y); } my ($best) = sort { $a->{proximity} <=> $b->{proximity} } @$mirrors; foreach (@$mirrors) { $_->{proximity_corrected} = $_->{proximity} * _random_correction(); $_->{proximity_corrected} *= _between_country_correction($country_code, $_->{country}) if $best; $_->{proximity_corrected} *= _between_continent_correction($best->{continent}, $_->{continent}) if $best; } @$mirrors = sort { $a->{proximity_corrected} <=> $b->{proximity_corrected} } @$mirrors; } # add +/- 5% random sub _random_correction() { my $correction = 0.05; 1 + (rand() - 0.5) * $correction * 2; } sub _between_country_correction { my ($here, $mirror) = @_; $here && $mirror or return 1; $here eq $mirror ? 0.5 : 1; } sub _between_continent_correction { my ($here, $mirror) = @_; $here && $mirror or return 1; $here eq $mirror ? 0.5 : # favor same continent $here eq 'SA' && $mirror eq 'NA' ? 0.9 : # favor going "South America" -> "North America" 1; } sub _mirrors_raw { my ($urpm, $url) = @_; $urpm->{log}(N("getting mirror list from %s", $url)); my @l = urpm::download::get_content($urpm, $url, disable_metalink => 1) or $urpm->{error}("mirror list not found"); @l; } sub _mirrors_filtered { my ($urpm, $mirrorlist) = @_; grep { $_->{type} eq 'distrib'; # type=updates seems to be history, and type=iso is not interesting here } map { chomp; parse_LDAP_namespace_structure($_) } _mirrors_raw($urpm, $mirrorlist); } sub _MIRRORLIST() { my $product_id = parse_LDAP_namespace_structure(cat_('/etc/product.id')); _mageia_mirrorlist($product_id); } sub _mageia_mirrorlist { my ($product_id, $o_arch) = @_; #- contact the following URL to retrieve the list of mirrors. #- http://wiki.mandriva.com/en/Product_id my $_product_type = lc($product_id->{type}); $product_id =~ s/\s//g; my $arch = $o_arch || $product_id->{arch}; my @para = grep { $_ } $ENV{URPMI_ADDMEDIA_REASON}; my $product_version = $ENV{URPMI_ADDMEDIA_PRODUCT_VERSION} || $product_id->{version}; #"http://mirrors.mageia.org/api/$product_type.$product_version.$arch.list" "http://mirrors.mageia.org/api/mageia.$product_version.$arch.list" . (@para ? '?' . join('&', @para) : ''); } #- heuristic to detect wether it is really a mirrorlist or a simple mirror url: sub _is_only_one_mirror { my ($mirrorlist) = @_; _expand($mirrorlist) !~ /\.list(\?|$)/; } sub _network_mtime() { (stat('/etc/resolv.conf'))[9] } sub _product_id_mtime() { (stat('/etc/product.id'))[9] } sub parse_LDAP_namespace_structure { my ($s) = @_; my %h = map { /(.*?)=(.*)/ ? ($1 => $2) : @{[]} } split(',', $s); \%h; } 1; __END__ =back =head1 COPYRIGHT Copyright (C) 2005 MandrakeSoft SA Copyright (C) 2005-2010 Mandriva SA =cut