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Add tag escaping to Item::setHashtags

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- Add return value to Item::setHashtags
This commit is contained in:
Hypolite Petovan 2020-06-04 20:56:50 -04:00
parent 472018191b
commit 76460ddd2d
3 changed files with 61 additions and 80 deletions
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2
mod/item.php
View file

@ -642,7 +642,7 @@ function item_post(App $a) {
// Check for hashtags in the body and repair or add hashtag links
if ($preview || $orig_post) {
Item::setHashtags($datarray);
$datarray['body'] = Item::setHashtags($datarray['body']);
}
// preview mode - prepare the body for display and send it via json

129
src/Model/Item.php
View file

@ -1780,7 +1780,7 @@ class Item
// Check for hashtags in the body and repair or add hashtag links
self::setHashtags($item);
$item['body'] = self::setHashtags($item['body']);
// Fill the cache field
self::putInCache($item);
@ -2424,84 +2424,69 @@ class Item
}
}
public static function setHashtags(&$item)
public static function setHashtags($body)
{
$tags = BBCode::getTags($item["body"]);
$body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code'], function ($body) {
$tags = BBCode::getTags($body);
// No hashtags?
if (!count($tags)) {
return false;
}
// What happens in [code], stays in [code]!
// escape the # and the [
// hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
$item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
function ($match) {
// we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
$find = ['#', '['];
$replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
}, $item["body"]);
// This sorting is important when there are hashtags that are part of other hashtags
// Otherwise there could be problems with hashtags like #test and #test2
// Because of this we are sorting from the longest to the shortest tag.
usort($tags, function($a, $b) {
return strlen($b) <=> strlen($a);
});
$URLSearchString = "^\[\]";
// All hashtags should point to the home server if "local_tags" is activated
if (DI::config()->get('system', 'local_tags')) {
$item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
"#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
}
// mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
$item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
function ($match) {
return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
}, $item["body"]);
$item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
function ($match) {
return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
}, $item["body"]);
$item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
function ($match) {
return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
}, $item["body"]);
// Repair recursive urls
$item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
"&num;$2", $item["body"]);
foreach ($tags as $tag) {
if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
continue;
// No hashtags?
if (!count($tags)) {
return $body;
}
$basetag = str_replace('_',' ',substr($tag,1));
$newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
// This sorting is important when there are hashtags that are part of other hashtags
// Otherwise there could be problems with hashtags like #test and #test2
// Because of this we are sorting from the longest to the shortest tag.
usort($tags, function ($a, $b) {
return strlen($b) <=> strlen($a);
});
$item["body"] = str_replace($tag, $newtag, $item["body"]);
}
$URLSearchString = "^\[\]";
// Convert back the masked hashtags
$item["body"] = str_replace("&num;", "#", $item["body"]);
// All hashtags should point to the home server if "local_tags" is activated
if (DI::config()->get('system', 'local_tags')) {
$body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
"#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
}
// Remember! What happens in [code], stays in [code]
// roleback the # and [
$item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
function ($match) {
// we truly unESCape all sharp and leftsquarebracket
$find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
$replace = ['#', '['];
return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
}, $item["body"]);
// mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
$body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
function ($match) {
return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
}, $body);
$body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
function ($match) {
return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
}, $body);
$body = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
function ($match) {
return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
}, $body);
// Repair recursive urls
$body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
"&num;$2", $body);
foreach ($tags as $tag) {
if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
continue;
}
$basetag = str_replace('_', ' ', substr($tag, 1));
$newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
$body = str_replace($tag, $newtag, $body);
}
// Convert back the masked hashtags
$body = str_replace("&num;", "#", $body);
return $body;
});
return $body;
}
/**

10
src/Module/Debug/Babel.php
View file

@ -102,14 +102,12 @@ class Babel extends BaseModule
'content' => visible_whitespace($bbcode4)
];
$item = ['body' => $bbcode];
$tags = Text\BBCode::getTags($bbcode);
Item::setHashtags($item);
$body = Item::setHashtags($bbcode);
$results[] = [
'title' => DI::l10n()->t('Item Body'),
'content' => visible_whitespace($item['body'])
'content' => visible_whitespace($body)
];
$results[] = [
'title' => DI::l10n()->t('Item Tags'),
@ -125,9 +123,7 @@ class Babel extends BaseModule
$markdown = XML::unescape($diaspora);
case 'markdown':
if (!isset($markdown)) {
$markdown = trim($_REQUEST['text']);
}
$markdown = $markdown ?? trim($_REQUEST['text']);
$results[] = [
'title' => DI::l10n()->t('Source input (Markdown)'),