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#!/usr/bin/perl |
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# Copyright David Leadbeater 2007 <http://dgl.cx>. |
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# Licensed under the same terms as Perl itself. |
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|
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# A simple example of using WWW::Facebook::API within a facebook canvas. |
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# You will need to change the api_key, secret and app_path below to match your |
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# account. To get an api_key and secret, go to |
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# http://www.facebook.com/developers/editapp.php?new, choose "Use FBML" and |
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# enter a unique name for the canvas which you should put into app_path. |
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|
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use strict; |
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use CGI; |
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use WWW::Facebook::API; |
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use Data::Dump qw/dump/; |
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use XML::FeedPP; |
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use Time::HiRes qw/time/; |
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|
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our ($api_key,$secret,$rss_url,$app_path); # XXX configure this in config.pl |
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require 'config.pl'; |
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|
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# UI elements |
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|
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sub dashboard { |
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print qq| |
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<fb:dashboard> |
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<fb:action href=/$app_path/>Search</fb:action> |
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<fb:action href=/$app_path/info>info</fb:action> |
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</fb:dashboard> |
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|; |
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''; |
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} |
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|
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sub form { |
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my $q = shift; |
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my $v = $q->param('search'); |
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$v = qq| value="$v"| if defined $v; |
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|
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print qq| |
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<form method="post" action="search"> |
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<input name="search" $v> |
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<input type="submit"> |
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</form> |
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|; |
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''; |
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} |
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|
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|
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my $facebook = WWW::Facebook::API->new( |
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api_key => $api_key, |
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secret => $secret, |
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app_path => $app_path, |
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parse => 1, |
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); |
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|
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our %action_map = ( |
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'' => \&index_page, |
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info => \&info_page, |
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search => \&search_page, |
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debug => \&debug_page, |
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); |
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|
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sub main { |
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|
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# Should also work with FastCGI (via CGI::Fast). |
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my $q = new CGI; |
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print "Content-type: text/html; encoding=utf-8\r\n\r\n"; |
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|
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# redirect("Must be called in facebook canvas") |
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# unless $facebook->canvas->in_fb_canvas($q); |
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|
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my $params = $facebook->canvas->validate_sig($q); |
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if ( $params->{user} ) { |
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|
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# Canvas takes care of setting up a session for us, no need to call the |
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# auth methods. |
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$facebook->session_key( $params->{session_key} ); |
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} |
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else { |
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|
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# User hasn't added app (could reject/display info/whatever) |
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# (Or handle later when a user is needed). |
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} |
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|
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my ( $action, $param ) = ( $q->path_info =~ m!^/(\w+)/?(.*)! ); |
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|
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if ( my $s = $action_map{$action} ) { |
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print dashboard; |
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print qq|<div style='padding-left: 2em'>|; |
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$s->( $q, $params ); |
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print qq|</div>|; |
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} |
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else { |
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div_error("Action unknown"); |
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} |
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|
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# Clear session_key (for if running under FastCGI). |
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$facebook->session_key(undef); |
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} |
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|
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sub index_page { |
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my ( $q, $params ) = @_; |
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|
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form($q); |
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|
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=for later |
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|
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# You could do this easier by using <fb:name>, just showing some API stuff here. |
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my $name = "You"; |
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if ($params) { |
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my $res = |
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$facebook->fql->query( query => |
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"SELECT first_name FROM user WHERE uid=$params->{canvas_user}" ); |
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$name = "Hi $res->[0]->{first_name}, you"; |
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} |
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print "$name ", ( $params ? "have" : "have't" ), |
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" added this application. Some <a href='info'>info</a>."; |
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if ( !$params ) { |
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print "<a href='", $facebook->get_add_url, |
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"'>Add this application</a>."; |
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} |
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|
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=cut |
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|
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|
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} |
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|
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sub info_page { |
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open( my $fh, '<', 'info.html' ); |
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print <$fh>; |
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close($fh); |
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} |
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|
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sub debug_page { |
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my ( $q, $params ) = @_; |
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print "<pre>"; |
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print dump($params); |
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print "</pre>"; |
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} |
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|
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sub search_page { |
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my ( $q, $params ) = @_; |
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|
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my $search = $q->param('search'); |
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|
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my $t = time(); |
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|
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my $feed = XML::FeedPP->new( $rss_url . $search ); |
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|
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my $t = time() - $t; |
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|
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print form($q), qq| |
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<ol> |
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|; |
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|
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foreach my $item ( $feed->get_item ) { |
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print qq|<li><a href="|, $item->link, qq|">|, $item->title, qq|</a><br>|, $item->description; |
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} |
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|
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print qq| |
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</ol> |
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|
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<div style="color: #ccc;">search took $t sec</div> |
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|; |
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|
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} |
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|
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sub redirect { |
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print("Please go <a href='" |
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. $facebook->get_app_url |
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. "'>to facebook</a>" ); |
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exit; |
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} |
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|
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main(); |
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