img support

.gitignore

@@ -1,2 +1,3 @@
 .DS_Store
 etc/autodoc.json
+.vstags

cgi/autodoc.fcgi

@@ -4,6 +4,7 @@ use strict;
 use FCGI;
 use JSON;
 use DBI;
+use GD::Simple;
 use Data::Dumper;
 use warnings;
 
@@ -31,6 +32,13 @@ while($request->Accept() >= 0) {
 	my $qs     = parse_querystring($ENV{QUERY_STRING});
 	my $method = $ENV{REQUEST_METHOD};
 
+	# QS sanity check
+	if ( exists $qs->{id} && $qs->{id} !~ /^\d+$/ ) { fatal_api_error(400,"invalid id"); }
+	if ( exists $qs->{maxWidth} && $qs->{maxWidth} !~ /^\d+$/ ) { fatal_api_error(400,"invalid maxWidth"); }
+	if ( exists $qs->{maxHeight} && $qs->{maxHeight} !~ /^\d+$/ ) { fatal_api_error(400,"invalid maxHeight"); }
+	if ( exists $qs->{pageSize} && $qs->{pageSize} !~ /^\d+$/ ) { fatal_api_error(400,"invalid pageSize"); }
+	if ( exists $qs->{pageIndex} && $qs->{pageIndex} !~ /^\d+$/ ) { fatal_api_error(400,"invalid pageIndex"); }
+
 	my $path   = [ split(/\//,$ENV{SCRIPT_NAME}) ] if exists $ENV{SCRIPT_NAME};
 	shift(@{$path});
 
@@ -183,6 +191,76 @@ sub db_get_page_object {
 	return (404, "application/json", "");
 }
 
+sub get_page_image {
+	my($id, $qs) = @_;
+
+	my $wh;
+	my $size;
+	if ( exists $qs->{maxWidth} ) {
+		$wh = 'w';
+		$size = $qs->{maxWidth};
+	}
+	elsif ( exists $qs->{maxHeight} ) {
+		$wh = 'h';
+		$size = $qs->{maxWidth};
+	}
+
+	my $original = sprintf("%s/%s/%s.jpeg",
+		$conf->{path}{global}, $conf->{path}{original}, $id);
+
+	my $cache_file = sprintf("%s/%s/%s-original.jpeg",
+		$conf->{path}{global}, $conf->{path}{images}, $id);
+
+	if ( defined $wh && defined $size ) {
+		$cache_file = sprintf("%s/%s/%s-%s-%s.jpeg",
+			$conf->{path}{global}, $conf->{path}{images}, $id, $wh, $size);
+	}
+
+
+	gen_thumbnail($original, $cache_file, $wh, $size) if !-r $cache_file;
+
+	my $img='';
+
+	if ( -r $cache_file ) {
+		open(IMG, $cache_file) || fatal_api_error(500, "Thumbnail generation failed");
+		binmode(IMG);
+		while(<IMG>) { $img.=$_; }
+		close(IMG);
+	}
+	else {
+		$img = gen_error_img($wh, $size, "No Image");
+	}
+
+	return (200, "image/jpeg", $img);
+}
+
+sub gen_thumbnail {
+	my($original, $cache, $wh, $size) = @_;
+
+	if ( -r $original ) {
+		system(sprintf("convert %s -resize %s%s %s",
+			$original,
+			$wh eq 'h' ? 'x' : '',
+			$size,
+			$cache
+		));
+	}
+}
+
+sub gen_error_img {
+	my($wh, $size, $text) = @_;
+
+	my $w = $size;
+	my $h = $size;
+
+	$h = int($w*(sqrt(2))) if $wh eq 'w';
+	$w = int($h/(sqrt(2))) if $wh eq 'h';
+
+	my $img = GD::Simple->new($w, $h);
+	$img->string($text);
+	return $img->jpeg;
+}
+
 # create an empty document object.
 sub api_v1_POST_documents {
 	my($id, $qs, $post, $user) = @_;
@@ -202,8 +280,17 @@ sub api_v1_POST_documents {
 }
 
 sub api_v1_POST_documents_id_data { return api_error(501,"Not yet implemented"); }
-sub api_v1_GET_documents_id_image { return api_error(501,"Not yet implemented"); }
-sub api_v1_GET_pages_image        { return api_error(501,"Not yet implemented"); }
+sub api_v1_GET_documents_id_image {
+		my($id, $qs, $post, $user) = @_;
+
+
+	return api_error(501,"Not yet implemented");
+}
+sub api_v1_GET_pages_image {
+	my($id, $qs, $post, $user) = @_;
+	get_page_image($id, $qs);
+	return api_error(501,"Not yet implemented");
+}
 
 # get a list of document objects
 sub api_v1_GET_documents {