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generate a warning if plugin-generated content of HOOK_ARTICLE_BUTTON or _LEFT_BUTTON can't be parsed as valid XML

This commit is contained in:
Andrew Dolgov 2022-01-06 10:37:03 +03:00
parent 97baf3e8b9
commit c3482fbe6b
4 changed files with 35 additions and 5 deletions
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23
classes/errors.php
View File

@ -14,4 +14,27 @@ class Errors {
static function to_json(string $code, array $params = []): string {
return json_encode(["error" => ["code" => $code, "params" => $params]]);
}
static function libxml_last_error() : string {
$error = libxml_get_last_error();
$error_formatted = "";
if ($error) {
foreach (libxml_get_errors() as $error) {
if ($error->level == LIBXML_ERR_FATAL) {
// currently only the first error is reported
$error_formatted = self::format_libxml_error($error);
break;
}
}
}
return UConverter::transcode($error_formatted, 'UTF-8', 'UTF-8');
}
static function format_libxml_error(LibXMLError $error) : string {
return sprintf("LibXML error %s at line %d (column %d): %s",
$error->code, $error->line, $error->column,
$error->message);
}
}

5
classes/feedparser.php
View File

@ -193,10 +193,9 @@ class FeedParser {
}
}
/** @deprecated use Errors::format_libxml_error() instead */
function format_error(LibXMLError $error) : string {
return sprintf("LibXML error %s at line %d (column %d): %s",
$error->code, $error->line, $error->column,
$error->message);
return Errors::format_libxml_error($error);
}
// libxml may have invalid unicode data in error messages

8
classes/feeds.php
View File

@ -254,6 +254,10 @@ class Feeds extends Handler_Protected {
$line["buttons_left"] .= $button_doc->saveXML($button_doc->firstChild);
}
} else if ($result) {
user_error(get_class($plugin) .
" plugin: content provided in HOOK_ARTICLE_LEFT_BUTTON is not valid XML: " .
Errors::libxml_last_error() . " $result", E_USER_WARNING);
}
},
$line);
@ -273,6 +277,10 @@ class Feeds extends Handler_Protected {
$line["buttons"] .= $button_doc->saveXML($button_doc->firstChild);
}
} else if ($result) {
user_error(get_class($plugin) .
" plugin: content provided in HOOK_ARTICLE_BUTTON is not valid XML: " .
Errors::libxml_last_error() . " $result", E_USER_WARNING);
}
},
$line);

4
classes/plugin.php
View File

@ -98,7 +98,7 @@ abstract class Plugin {
/* GLOBAL hooks are invoked in global context, only available to system plugins (loaded via .env for all users) */
/** Adds buttons for article (on the right) - e.g. mail, share, add note.
/** Adds buttons for article (on the right) - e.g. mail, share, add note. Generated markup must be valid XML.
* @param array<string,mixed> $line
* @return string
* @see PluginHost::HOOK_ARTICLE_BUTTON
@ -307,7 +307,7 @@ abstract class Plugin {
return [];
}
/** Adds per-article buttons on the left side
/** Adds per-article buttons on the left side. Generated markup must be valid XML.
* @param array<string,mixed> $row
* @return string
* @see PluginHost::HOOK_ARTICLE_LEFT_BUTTON