#!/usr/bin/perl
-# Blog aggregation plugin.
+# Feed aggregation plugin.
package IkiWiki::Plugin::aggregate;
use warnings;
use strict;
-use IkiWiki;
-use HTML::Entities;
+use IkiWiki 2.00;
use HTML::Parser;
use HTML::Tagset;
+use HTML::Entities;
use URI;
+use open qw{:utf8 :std};
my %feeds;
my %guids;
sub import { #{{{
hook(type => "getopt", id => "aggregate", call => \&getopt);
+ hook(type => "getsetup", id => "aggregate", call => \&getsetup);
hook(type => "checkconfig", id => "aggregate", call => \&checkconfig);
- hook(type => "filter", id => "aggregate", call => \&filter);
+ hook(type => "needsbuild", id => "aggregate", call => \&needsbuild);
hook(type => "preprocess", id => "aggregate", call => \&preprocess);
hook(type => "delete", id => "aggregate", call => \&delete);
hook(type => "savestate", id => "aggregate", call => \&savestate);
+ hook(type => "htmlize", id => "_aggregated", call => \&htmlize);
+ if (exists $config{aggregate_webtrigger} && $config{aggregate_webtrigger}) {
+ hook(type => "cgi", id => "aggregate", call => \&cgi);
+ }
} # }}}
sub getopt () { #{{{
eval q{use Getopt::Long};
+ error($@) if $@;
Getopt::Long::Configure('pass_through');
- GetOptions("aggregate" => \$config{aggregate});
+ GetOptions(
+ "aggregate" => \$config{aggregate},
+ "aggregateinternal!" => \$config{aggregateinternal},
+ );
+} #}}}
+
+sub getsetup () { #{{{
+ return
+ aggregateinternal => {
+ type => "boolean",
+ example => 0,
+ description => "enable aggregation to internal pages?",
+ safe => 0, # enabling needs manual transition
+ rebuild => 0,
+ },
+ aggregate_webtrigger => {
+ type => "boolean",
+ example => 0,
+ description => "allow aggregation to be triggered via the web?",
+ safe => 1,
+ rebuild => 0,
+ },
} #}}}
sub checkconfig () { #{{{
- IkiWiki::lockwiki();
+ if ($config{aggregate} && ! ($config{post_commit} &&
+ IkiWiki::commit_hook_enabled())) {
+ launchaggregation();
+ }
+} #}}}
+
+sub cgi ($) { #{{{
+ my $cgi=shift;
+
+ if (defined $cgi->param('do') &&
+ $cgi->param("do") eq "aggregate_webtrigger") {
+ $|=1;
+ print "Content-Type: text/plain\n\n";
+ $config{cgi}=0;
+ $config{verbose}=1;
+ $config{syslog}=0;
+ print gettext("Aggregation triggered via web.")."\n\n";
+ if (launchaggregation()) {
+ IkiWiki::lockwiki();
+ IkiWiki::loadindex();
+ require IkiWiki::Render;
+ IkiWiki::refresh();
+ IkiWiki::saveindex();
+ }
+ else {
+ print gettext("Nothing to do right now, all feeds are up-to-date!")."\n";
+ }
+ exit 0;
+ }
+} #}}}
+
+sub launchaggregation () { #{{{
+ # See if any feeds need aggregation.
loadstate();
- if ($config{aggregate}) {
+ my @feeds=needsaggregate();
+ return unless @feeds;
+ if (! lockaggregate()) {
+ debug("an aggregation process is already running");
+ return;
+ }
+ # force a later rebuild of source pages
+ $IkiWiki::forcerebuild{$_->{sourcepage}}=1
+ foreach @feeds;
+
+ # Fork a child process to handle the aggregation.
+ # The parent process will then handle building the
+ # result. This avoids messy code to clear state
+ # accumulated while aggregating.
+ defined(my $pid = fork) or error("Can't fork: $!");
+ if (! $pid) {
IkiWiki::loadindex();
- aggregate();
+ # Aggregation happens without the main wiki lock
+ # being held. This allows editing pages etc while
+ # aggregation is running.
+ aggregate(@feeds);
+
+ IkiWiki::lockwiki;
+ # Merge changes, since aggregation state may have
+ # changed on disk while the aggregation was happening.
+ mergestate();
+ expire();
savestate();
+ IkiWiki::unlockwiki;
+ exit 0;
+ }
+ waitpid($pid,0);
+ if ($?) {
+ error "aggregation failed with code $?";
}
- IkiWiki::unlockwiki();
+
+ clearstate();
+ unlockaggregate();
+
+ return 1;
} #}}}
-sub filter (@) { #{{{
+# Pages with extension _aggregated have plain html markup, pass through.
+sub htmlize (@) { #{{{
my %params=@_;
- my $page=$params{page};
+ return $params{content};
+} #}}}
- # Mark all feeds originating on this page as removable;
- # preprocess will unmark those that still exist.
- remove_feeds($page);
+# Used by ikiwiki-transition aggregateinternal.
+sub migrate_to_internal { #{{{
+ if (! lockaggregate()) {
+ error("an aggregation process is currently running");
+ }
- return $params{content};
+ IkiWiki::lockwiki();
+ loadstate();
+ $config{verbose}=1;
+
+ foreach my $data (values %guids) {
+ next unless $data->{page};
+ next if $data->{expired};
+
+ $config{aggregateinternal} = 0;
+ my $oldname = pagefile($data->{page});
+ my $oldoutput = $config{destdir}."/".IkiWiki::htmlpage($data->{page});
+
+ $config{aggregateinternal} = 1;
+ my $newname = pagefile($data->{page});
+
+ debug "moving $oldname -> $newname";
+ if (-e $newname) {
+ if (-e $oldname) {
+ error("$newname already exists");
+ }
+ else {
+ debug("already renamed to $newname?");
+ }
+ }
+ elsif (-e $oldname) {
+ rename($oldname, $newname) || error("$!");
+ }
+ else {
+ debug("$oldname not found");
+ }
+ if (-e $oldoutput) {
+ require IkiWiki::Render;
+ debug("removing output file $oldoutput");
+ IkiWiki::prune($oldoutput);
+ }
+ }
+
+ savestate();
+ IkiWiki::unlockwiki;
+
+ unlockaggregate();
+} #}}}
+
+sub needsbuild (@) { #{{{
+ my $needsbuild=shift;
+
+ loadstate();
+
+ foreach my $feed (values %feeds) {
+ if (exists $pagesources{$feed->{sourcepage}} &&
+ grep { $_ eq $pagesources{$feed->{sourcepage}} } @$needsbuild) {
+ # Mark all feeds originating on this page as
+ # not yet seen; preprocess will unmark those that
+ # still exist.
+ markunseen($feed->{sourcepage});
+ }
+ }
} # }}}
sub preprocess (@) { #{{{
foreach my $required (qw{name url}) {
if (! exists $params{$required}) {
- return "[[aggregate plugin missing $required parameter]]";
+ error sprintf(gettext("missing %s parameter"), $required)
}
}
$feed->{updateinterval}=defined $params{updateinterval} ? $params{updateinterval} * 60 : 15 * 60;
$feed->{expireage}=defined $params{expireage} ? $params{expireage} : 0;
$feed->{expirecount}=defined $params{expirecount} ? $params{expirecount} : 0;
- delete $feed->{remove};
+ if (exists $params{template}) {
+ $params{template}=~s/[^-_a-zA-Z0-9]+//g;
+ }
+ else {
+ $params{template} = "aggregatepost"
+ }
+ $feed->{template}=$params{template} . ".tmpl";
+ delete $feed->{unseen};
$feed->{lastupdate}=0 unless defined $feed->{lastupdate};
$feed->{numposts}=0 unless defined $feed->{numposts};
$feed->{newposts}=0 unless defined $feed->{newposts};
- $feed->{message}="new feed" unless defined $feed->{message};
+ $feed->{message}=gettext("new feed") unless defined $feed->{message};
$feed->{error}=0 unless defined $feed->{error};
$feed->{tags}=[];
while (@_) {
return "<a href=\"".$feed->{url}."\">".$feed->{name}."</a>: ".
($feed->{error} ? "<em>" : "").$feed->{message}.
($feed->{error} ? "</em>" : "").
- " (".$feed->{numposts}." posts".
- ($feed->{newposts} ? "; ".$feed->{newposts}." new" : "").
+ " (".$feed->{numposts}." ".gettext("posts").
+ ($feed->{newposts} ? "; ".$feed->{newposts}.
+ " ".gettext("new") : "").
")";
} # }}}
# Remove feed data for removed pages.
foreach my $file (@files) {
my $page=pagename($file);
- remove_feeds($page);
+ markunseen($page);
}
} #}}}
+sub markunseen ($) { #{{{
+ my $page=shift;
+
+ foreach my $id (keys %feeds) {
+ if ($feeds{$id}->{sourcepage} eq $page) {
+ $feeds{$id}->{unseen}=1;
+ }
+ }
+} #}}}
+
+my $state_loaded=0;
+
sub loadstate () { #{{{
+ return if $state_loaded;
+ $state_loaded=1;
if (-e "$config{wikistatedir}/aggregate") {
- open (IN, "$config{wikistatedir}/aggregate" ||
- die "$config{wikistatedir}/aggregate: $!");
+ open(IN, "$config{wikistatedir}/aggregate") ||
+ die "$config{wikistatedir}/aggregate: $!";
while (<IN>) {
$_=IkiWiki::possibly_foolish_untaint($_);
chomp;
} #}}}
sub savestate () { #{{{
- eval q{use HTML::Entities};
- die $@ if $@;
- open (OUT, ">$config{wikistatedir}/aggregate" ||
- die "$config{wikistatedir}/aggregate: $!");
+ return unless $state_loaded;
+ garbage_collect();
+ my $newfile="$config{wikistatedir}/aggregate.new";
+ my $cleanup = sub { unlink($newfile) };
+ open (OUT, ">$newfile") || error("open $newfile: $!", $cleanup);
foreach my $data (values %feeds, values %guids) {
- if ($data->{remove}) {
- if ($data->{name}) {
- foreach my $guid (values %guids) {
- if ($guid->{feed} eq $data->{name}) {
- $guid->{remove}=1;
- }
- }
- }
- else {
- unlink pagefile($data->{page});
- }
- next;
- }
-
my @line;
foreach my $field (keys %$data) {
if ($field eq "name" || $field eq "feed" ||
push @line, "$field=".$data->{$field};
}
}
- print OUT join(" ", @line)."\n";
+ print OUT join(" ", @line)."\n" || error("write $newfile: $!", $cleanup);
}
- close OUT;
+ close OUT || error("save $newfile: $!", $cleanup);
+ rename($newfile, "$config{wikistatedir}/aggregate") ||
+ error("rename $newfile: $!", $cleanup);
} #}}}
-sub aggregate () { #{{{
- eval q{use XML::Feed};
- die $@ if $@;
- eval q{use HTML::Entities};
- die $@ if $@;
+sub garbage_collect () { #{{{
+ foreach my $name (keys %feeds) {
+ # remove any feeds that were not seen while building the pages
+ # that used to contain them
+ if ($feeds{$name}->{unseen}) {
+ delete $feeds{$name};
+ }
+ }
+
+ foreach my $guid (values %guids) {
+ # any guid whose feed is gone should be removed
+ if (! exists $feeds{$guid->{feed}}) {
+ unlink pagefile($guid->{page})
+ if exists $guid->{page};
+ delete $guids{$guid->{guid}};
+ }
+ # handle expired guids
+ elsif ($guid->{expired} && exists $guid->{page}) {
+ unlink pagefile($guid->{page});
+ delete $guid->{page};
+ delete $guid->{md5};
+ }
+ }
+} #}}}
+
+sub mergestate () { #{{{
+ # Load the current state in from disk, and merge into it
+ # values from the state in memory that might have changed
+ # during aggregation.
+ my %myfeeds=%feeds;
+ my %myguids=%guids;
+ clearstate();
+ loadstate();
+
+ # All that can change in feed state during aggregation is a few
+ # fields.
+ foreach my $name (keys %myfeeds) {
+ if (exists $feeds{$name}) {
+ foreach my $field (qw{message lastupdate numposts
+ newposts error}) {
+ $feeds{$name}->{$field}=$myfeeds{$name}->{$field};
+ }
+ }
+ }
+
+ # New guids can be created during aggregation.
+ # It's also possible that guids were removed from the on-disk state
+ # while the aggregation was in process. That would only happen if
+ # their feed was also removed, so any removed guids added back here
+ # will be garbage collected later.
+ foreach my $guid (keys %myguids) {
+ if (! exists $guids{$guid}) {
+ $guids{$guid}=$myguids{$guid};
+ }
+ }
+} #}}}
+
+sub clearstate () { #{{{
+ %feeds=();
+ %guids=();
+ $state_loaded=0;
+} #}}}
+sub expire () { #{{{
foreach my $feed (values %feeds) {
- next unless $config{rebuild} ||
- time - $feed->{lastupdate} >= $feed->{updateinterval};
+ next unless $feed->{expireage} || $feed->{expirecount};
+ my $count=0;
+ my %seen;
+ foreach my $item (sort { $IkiWiki::pagectime{$b->{page}} <=> $IkiWiki::pagectime{$a->{page}} }
+ grep { exists $_->{page} && $_->{feed} eq $feed->{name} && $IkiWiki::pagectime{$_->{page}} }
+ values %guids) {
+ if ($feed->{expireage}) {
+ my $days_old = (time - $IkiWiki::pagectime{$item->{page}}) / 60 / 60 / 24;
+ if ($days_old > $feed->{expireage}) {
+ debug(sprintf(gettext("expiring %s (%s days old)"),
+ $item->{page}, int($days_old)));
+ $item->{expired}=1;
+ }
+ }
+ elsif ($feed->{expirecount} &&
+ $count >= $feed->{expirecount}) {
+ debug(sprintf(gettext("expiring %s"), $item->{page}));
+ $item->{expired}=1;
+ }
+ else {
+ if (! $seen{$item->{page}}) {
+ $seen{$item->{page}}=1;
+ $count++;
+ }
+ }
+ }
+ }
+} #}}}
+
+sub needsaggregate () { #{{{
+ return values %feeds if $config{rebuild};
+ return grep { time - $_->{lastupdate} >= $_->{updateinterval} } values %feeds;
+} #}}}
+
+sub aggregate (@) { #{{{
+ eval q{use XML::Feed};
+ error($@) if $@;
+ eval q{use URI::Fetch};
+ error($@) if $@;
+
+ foreach my $feed (@_) {
$feed->{lastupdate}=time;
$feed->{newposts}=0;
- $IkiWiki::forcerebuild{$feed->{sourcepage}}=1;
+ $feed->{message}=sprintf(gettext("processed ok at %s"),
+ displaytime($feed->{lastupdate}));
+ $feed->{error}=0;
- debug("checking feed ".$feed->{name}." ...");
+ debug(sprintf(gettext("checking feed %s ..."), $feed->{name}));
if (! length $feed->{feedurl}) {
my @urls=XML::Feed->find_feeds($feed->{url});
if (! @urls) {
- $feed->{message}="could not find feed at ".$feed->{feedurl};
+ $feed->{message}=sprintf(gettext("could not find feed at %s"), $feed->{url});
$feed->{error}=1;
debug($feed->{message});
next;
}
$feed->{feedurl}=pop @urls;
}
- my $f=eval{XML::Feed->parse(URI->new($feed->{feedurl}))};
+ my $res=URI::Fetch->fetch($feed->{feedurl});
+ if (! $res) {
+ $feed->{message}=URI::Fetch->errstr;
+ $feed->{error}=1;
+ debug($feed->{message});
+ next;
+ }
+ if ($res->status == URI::Fetch::URI_GONE()) {
+ $feed->{message}=gettext("feed not found");
+ $feed->{error}=1;
+ debug($feed->{message});
+ next;
+ }
+ my $content=$res->content;
+ my $f=eval{XML::Feed->parse(\$content)};
+ if ($@) {
+ # One common cause of XML::Feed crashing is a feed
+ # that contains invalid UTF-8 sequences. Convert
+ # feed to ascii to try to work around.
+ $feed->{message}.=" ".sprintf(gettext("(invalid UTF-8 stripped from feed)"));
+ $content=Encode::decode_utf8($content, 0);
+ $f=eval{XML::Feed->parse(\$content)};
+ }
if ($@) {
- $feed->{message}="feed crashed XML::Feed! $@";
+ # Another possibility is badly escaped entities.
+ $feed->{message}.=" ".sprintf(gettext("(feed entities escaped)"));
+ $content=~s/\&(?!amp)(\w+);/&$1;/g;
+ $content=Encode::decode_utf8($content, 0);
+ $f=eval{XML::Feed->parse(\$content)};
+ }
+ if ($@) {
+ $feed->{message}=gettext("feed crashed XML::Feed!")." ($@)";
$feed->{error}=1;
debug($feed->{message});
next;
foreach my $entry ($f->entries) {
add_page(
feed => $feed,
+ copyright => $f->copyright,
title => defined $entry->title ? decode_entities($entry->title) : "untitled",
link => $entry->link,
- content => $entry->content->body,
- guid => defined $entry->id ? $entry->id : time."_".$feed->name,
+ content => defined $entry->content->body ? $entry->content->body : "",
+ guid => defined $entry->id ? $entry->id : time."_".$feed->{name},
ctime => $entry->issued ? ($entry->issued->epoch || time) : time,
);
}
-
- $feed->{message}="processed ok at ".
- displaytime($feed->{lastupdate});
- $feed->{error}=0;
}
-
- # TODO: expiry
} #}}}
sub add_page (@) { #{{{
if (exists $guids{$params{guid}}) {
# updating an existing post
$guid=$guids{$params{guid}};
+ return if $guid->{expired};
}
else {
# new post
-e pagefile($page.$c)) {
$c++
}
+
+ # Make sure that the file name isn't too long.
+ # NB: This doesn't check for path length limits.
+ my $max=POSIX::pathconf($config{srcdir}, &POSIX::_PC_NAME_MAX);
+ if (defined $max && length(htmlfn($page)) >= $max) {
+ $c="";
+ $page=$feed->{dir}."/item";
+ while (exists $IkiWiki::pagecase{lc $page.$c} ||
+ -e pagefile($page.$c)) {
+ $c++
+ }
+ }
+
$guid->{page}=$page;
- debug("creating new page $page");
+ debug(sprintf(gettext("creating new page %s"), $page));
}
$guid->{feed}=$feed->{name};
# to avoid unneccessary rebuilding. The mtime from rss cannot be
# trusted; let's use a digest.
eval q{use Digest::MD5 'md5_hex'};
+ error($@) if $@;
require Encode;
my $digest=md5_hex(Encode::encode_utf8($params{content}));
return unless ! exists $guid->{md5} || $guid->{md5} ne $digest || $config{rebuild};
$guid->{md5}=$digest;
# Create the page.
- my $template=template("aggregatepost.tmpl", blind_cache => 1);
+ my $template=template($feed->{template}, blind_cache => 1);
$template->param(title => $params{title})
if defined $params{title} && length($params{title});
$template->param(content => htmlescape(htmlabs($params{content}, $feed->{feedurl})));
$template->param(name => $feed->{name});
$template->param(url => $feed->{url});
+ $template->param(copyright => $params{copyright})
+ if defined $params{copyright} && length $params{copyright};
$template->param(permalink => urlabs($params{link}, $feed->{feedurl}))
if defined $params{link};
if (ref $feed->{tags}) {
$template->param(tags => [map { tag => $_ }, @{$feed->{tags}}]);
}
- writefile(htmlpage($guid->{page}), $config{srcdir},
+ writefile(htmlfn($guid->{page}), $config{srcdir},
$template->output);
# Set the mtime, this lets the build process get the right creation
# time on record for the new page.
- utime $mtime, $mtime, pagefile($guid->{page}) if defined $mtime;
+ utime $mtime, $mtime, pagefile($guid->{page})
+ if defined $mtime && $mtime <= time;
} #}}}
sub htmlescape ($) { #{{{
return $ret;
} #}}}
-sub remove_feeds () { #{{{
+sub pagefile ($) { #{{{
my $page=shift;
- my %removed;
- foreach my $id (keys %feeds) {
- if ($feeds{$id}->{sourcepage} eq $page) {
- $feeds{$id}->{remove}=1;
- $removed{$id}=1;
- }
- }
+ return "$config{srcdir}/".htmlfn($page);
} #}}}
-sub pagefile ($) { #{{{
- my $page=shift;
+sub htmlfn ($) { #{{{
+ return shift().".".($config{aggregateinternal} ? "_aggregated" : $config{htmlext});
+} #}}}
+
+my $aggregatelock;
+
+sub lockaggregate () { #{{{
+ # Take an exclusive lock to prevent multiple concurrent aggregators.
+ # Returns true if the lock was aquired.
+ if (! -d $config{wikistatedir}) {
+ mkdir($config{wikistatedir});
+ }
+ open($aggregatelock, '>', "$config{wikistatedir}/aggregatelock") ||
+ error ("cannot open to $config{wikistatedir}/aggregatelock: $!");
+ if (! flock($aggregatelock, 2 | 4)) { # LOCK_EX | LOCK_NB
+ close($aggregatelock) || error("failed closing aggregatelock: $!");
+ return 0;
+ }
+ return 1;
+} #}}}
- return "$config{srcdir}/".htmlpage($page);
+sub unlockaggregate () { #{{{
+ return close($aggregatelock) if $aggregatelock;
+ return;
} #}}}
1