483 lines
16 KiB
PHP
483 lines
16 KiB
PHP
<?php
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/**
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* File: error
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* Functions for handling and reporting errors.
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*/
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ini_set("display_errors", false);
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ini_set("error_log", MAIN_DIR.DIR."error_log.txt");
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# Set the appropriate error reporting level.
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if (DEBUG)
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error_reporting(E_ALL | E_STRICT);
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else
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error_reporting(E_ALL & ~E_NOTICE & ~E_STRICT & ~E_USER_NOTICE);
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# Set the error and exception handlers.
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set_error_handler("error_composer");
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set_exception_handler("exception_composer");
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/**
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* Function: error_composer
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* Composes a message for the error() function to display.
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*/
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function error_composer($errno, $message, $file, $line) {
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# Test for suppressed errors and excluded error levels.
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if (!(error_reporting() & $errno))
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return true;
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$normalized = str_replace(
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array("\t", "\n", "\r", "\0", "\x0B"),
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" ",
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$message
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);
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if (DEBUG)
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error_log(
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"ERROR: ".$errno." ".strip_tags($normalized).
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" (".$file." on line ".$line.")"
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);
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error(body:$message, backtrace:debug_backtrace());
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}
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/**
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* Function: exception_composer
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* Composes a message for the error() function to display.
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*/
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function exception_composer($e) {
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$errno = $e->getCode();
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$message = $e->getMessage();
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$file = $e->getFile();
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$line = $e->getLine();
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$normalized = str_replace(
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array("\t", "\n", "\r", "\0", "\x0B"),
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" ",
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$message
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);
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if (DEBUG)
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error_log(
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"ERROR: ".$errno." ".strip_tags($normalized).
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" (".$file." on line ".$line.")"
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);
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error(body:$message, backtrace:$e->getTrace());
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}
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/**
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* Function: error
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* Displays an error message via direct call or handler.
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*
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* Parameters:
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* $title - The title for the error dialog.
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* $body - The message for the error dialog.
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* $backtrace - The trace of the error.
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* $code - Numeric HTTP status code to set.
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*/
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function error($title = "", $body = "", $backtrace = array(), $code = 500)/*: never*/{
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# Discard any additional output buffers.
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while (OB_BASE_LEVEL < ob_get_level())
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ob_end_clean();
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# Clean the output buffer before we begin.
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if (ob_get_contents() !== false)
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ob_clean();
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# Attempt to set headers to sane values and send a status code.
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if (!headers_sent()) {
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header("Content-Type: text/html; charset=UTF-8");
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header("Cache-Control: no-cache, must-revalidate");
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header("Expires: Mon, 03 Jun 1991 05:30:00 GMT");
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# Resend the content encoding header if transparent compression is on.
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if (CAN_USE_ZLIB and ini_get("zlib.output_compression"))
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header("Content-Encoding: ".(HTTP_ACCEPT_GZIP ? "gzip" : "deflate"));
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switch ($code) {
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case 400:
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header($_SERVER['SERVER_PROTOCOL']." 400 Bad Request");
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break;
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case 401:
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header($_SERVER['SERVER_PROTOCOL']." 401 Unauthorized");
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break;
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case 403:
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header($_SERVER['SERVER_PROTOCOL']." 403 Forbidden");
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break;
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case 404:
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header($_SERVER['SERVER_PROTOCOL']." 404 Not Found");
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break;
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case 405:
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header($_SERVER['SERVER_PROTOCOL']." 405 Method Not Allowed");
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break;
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case 409:
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header($_SERVER['SERVER_PROTOCOL']." 409 Conflict");
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break;
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case 410:
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header($_SERVER['SERVER_PROTOCOL']." 410 Gone");
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break;
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case 413:
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header($_SERVER['SERVER_PROTOCOL']." 413 Payload Too Large");
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break;
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case 422:
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header($_SERVER['SERVER_PROTOCOL']." 422 Unprocessable Entity");
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break;
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case 429:
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header($_SERVER['SERVER_PROTOCOL']." 429 Too Many Requests");
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break;
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case 431:
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header($_SERVER['SERVER_PROTOCOL']." 431 Request Header Fields Too Large");
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break;
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case 501:
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header($_SERVER['SERVER_PROTOCOL']." 501 Not Implemented");
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break;
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case 502:
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header($_SERVER['SERVER_PROTOCOL']." 502 Bad Gateway");
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break;
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case 503:
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header($_SERVER['SERVER_PROTOCOL']." 503 Service Unavailable");
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break;
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case 504:
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header($_SERVER['SERVER_PROTOCOL']." 504 Gateway Timeout");
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break;
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default:
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header($_SERVER['SERVER_PROTOCOL']." 500 Internal Server Error");
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}
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}
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# Report in plain text if desirable or necessary because of a deep error.
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if (
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AJAX or
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!function_exists("__") or
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!function_exists("_f") or
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!function_exists("fallback") or
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!function_exists("fix") or
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!function_exists("sanitize_html") or
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!function_exists("logged_in") or
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!file_exists(INCLUDES_DIR.DIR."config.json.php") or
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!class_exists("Config") or
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!method_exists("Config", "current") or
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!isset(Config::current()->locale) or
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!isset(Config::current()->chyrp_url)
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)
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exit("ERROR: ".strip_tags($body));
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# We need this for the pretty error page.
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$chyrp_url = fix(Config::current()->chyrp_url, true);
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# Set fallbacks.
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fallback($title, __("Error"));
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fallback($body, __("An unspecified error has occurred."));
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fallback($backtrace, array());
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# Redact and escape the backtrace for display.
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foreach ($backtrace as $index => &$trace) {
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if (!isset($trace["file"]) or !isset($trace["line"]))
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unset($backtrace[$index]);
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else
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$trace["file"] = fix(
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str_replace(MAIN_DIR.DIR, "", $trace["file"]),
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false,
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true
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);
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}
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#---------------------------------------------
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# Output Starts
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#---------------------------------------------
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?>
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<!DOCTYPE html>
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<html dir="auto">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=640">
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<title><?php echo strip_tags($title); ?></title>
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<style type="text/css">
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@font-face {
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font-family: 'Open Sans webfont';
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src: url('<?php echo $chyrp_url; ?>/fonts/OpenSans-Regular.woff') format('woff');
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font-weight: normal;
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font-style: normal;
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}
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@font-face {
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font-family: 'Open Sans webfont';
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src: url('<?php echo $chyrp_url; ?>/fonts/OpenSans-SemiBold.woff') format('woff');
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font-weight: 600;
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font-style: normal;
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}
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@font-face {
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font-family: 'Open Sans webfont';
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src: url('<?php echo $chyrp_url; ?>/fonts/OpenSans-Bold.woff') format('woff');
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font-weight: bold;
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font-style: normal;
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}
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@font-face {
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font-family: 'Open Sans webfont';
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src: url('<?php echo $chyrp_url; ?>/fonts/OpenSans-Italic.woff') format('woff');
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font-weight: normal;
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font-style: italic;
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}
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@font-face {
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font-family: 'Open Sans webfont';
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src: url('<?php echo $chyrp_url; ?>/fonts/OpenSans-SemiBoldItalic.woff') format('woff');
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font-weight: 600;
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font-style: italic;
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}
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@font-face {
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font-family: 'Open Sans webfont';
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src: url('<?php echo $chyrp_url; ?>/fonts/OpenSans-BoldItalic.woff') format('woff');
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font-weight: bold;
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font-style: italic;
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}
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@font-face {
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font-family: 'Cousine webfont';
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src: url('<?php echo $chyrp_url; ?>/fonts/Cousine-Regular.woff') format('woff');
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font-weight: normal;
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font-style: normal;
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}
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@font-face {
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font-family: 'Cousine webfont';
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src: url('<?php echo $chyrp_url; ?>/fonts/Cousine-Bold.woff') format('woff');
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font-weight: bold;
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font-style: normal;
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}
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@font-face {
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font-family: 'Cousine webfont';
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src: url('<?php echo $chyrp_url; ?>/fonts/Cousine-Italic.woff') format('woff');
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font-weight: normal;
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font-style: italic;
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}
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@font-face {
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font-family: 'Cousine webfont';
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src: url('<?php echo $chyrp_url; ?>/fonts/Cousine-BoldItalic.woff') format('woff');
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font-weight: bold;
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font-style: italic;
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}
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:root {
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color-scheme: light dark;
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}
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*::selection {
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color: #ffffff;
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background-color: #ff7f00;
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}
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html, body, div, dl, dt, dd, ul, ol, li, p,
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h1, h2, h3, h4, h5, h6, img, pre, code,
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form, fieldset, input, select, textarea,
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table, tbody, tr, th, td, legend, caption,
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blockquote, aside, figure, figcaption {
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margin: 0em;
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padding: 0em;
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border: 0em;
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}
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html {
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font-size: 16px;
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}
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body {
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font-size: 1rem;
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font-family: "Open Sans webfont", sans-serif;
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line-height: 1.5;
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color: #1f1f23;
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tab-size: 4;
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background: #efefef;
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margin: 2rem;
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}
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h1 {
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font-size: 2em;
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font-weight: bold;
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margin: 1rem 0rem;
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text-align: center;
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}
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h2 {
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font-size: 1.5em;
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font-weight: bold;
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text-align: center;
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margin: 1rem 0rem;
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}
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h3 {
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font-size: 1em;
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font-weight: 600;
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margin: 1rem 0rem;
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border-bottom: 1px solid #cfcfcf;
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}
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p {
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width: fit-content;
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margin: 0rem auto 1rem auto;
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}
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pre {
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font-family: "Cousine webfont", monospace;
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font-size: 0.85em;
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background-color: #efefef;
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margin: 1rem 0rem;
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padding: 1rem;
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overflow-x: auto;
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white-space: pre;
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}
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code {
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font-family: "Cousine webfont", monospace;
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font-size: 0.85em;
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background-color: #efefef;
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padding: 0px 2px;
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border: 1px solid #cfcfcf;
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vertical-align: bottom;
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white-space: break-spaces;
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}
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pre > code {
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font-size: 0.85rem;
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display: block;
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border: none;
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padding: 0px;
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white-space: inherit;
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}
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strong {
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font: inherit;
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font-weight: bold;
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color: #c11600;
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}
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em, dfn, cite, var {
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font: inherit;
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font-style: italic;
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}
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ul, ol {
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margin-bottom: 1rem;
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margin-inline-start: 2rem;
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list-style-position: outside;
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}
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ol.backtrace {
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font-family: "Cousine webfont", monospace;
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font-size: 0.85rem;
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word-break: break-all;
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}
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a:link,
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a:visited {
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color: #1f1f23;
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text-decoration: underline;
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text-underline-offset: 0.125em;
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}
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a:focus {
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outline: #ff7f00 dashed 2px;
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outline-offset: 1px;
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}
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a:hover,
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a:focus,
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a:active {
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color: #1e57ba;
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text-decoration: underline;
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text-underline-offset: 0.125em;
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}
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a.big,
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button {
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box-sizing: border-box;
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display: block;
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clear: both;
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font: inherit;
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font-size: 1.25em;
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text-align: center;
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color: #1f1f23;
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text-decoration: none;
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margin: 1rem 0rem;
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padding: 0.5rem;
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background-color: #f2fbff;
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border: 2px solid #b8cdd9;
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border-radius: 0.25em;
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cursor: pointer;
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}
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button {
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width: 100%;
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}
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a.big:hover,
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button:hover,
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a.big:focus,
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button:focus,
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a.big:active,
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button:active {
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border-color: #1e57ba;
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outline: none;
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}
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hr {
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border: none;
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clear: both;
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border-top: 1px solid #cfcfcf;
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margin: 2rem 0rem;
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}
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aside {
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margin-bottom: 1rem;
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padding: 0.5rem 1rem;
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border: 1px solid #e5d7a1;
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border-radius: 0.25em;
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background-color: #fffecd;
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}
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.window {
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width: 30rem;
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background: #ffffff;
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padding: 2rem;
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margin: 0rem auto 0rem auto;
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border-radius: 2rem;
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}
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.window > *:first-child {
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margin-top: 0rem;
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}
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.window > *:last-child {
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margin-bottom: 0rem;
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}
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@media (prefers-color-scheme: dark) {
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body {
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color: #ffffff;
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background-color: #1f1f23;
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}
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.window {
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color: #1f1f23;
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background-color: #efefef;
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}
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hr {
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border-color: #afafaf;
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}
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aside {
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border-color: #afafaf;
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}
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pre {
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background-color: #dfdfdf;
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}
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code {
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background-color: #dfdfdf;
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border-color: #afafaf;
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}
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}
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</style>
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</head>
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<body>
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<div role="alert" class="window">
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<h1><?php echo sanitize_html($title); ?></h1>
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<p><?php echo sanitize_html($body); ?>
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<?php if (!empty($backtrace) and DEBUG): ?>
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<h3><?php echo __("Backtrace"); ?></h3>
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<ol class="backtrace">
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<?php foreach ($backtrace as $trace): ?>
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<li>
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<?php echo _f("%s on line %d", array($trace["file"], (int) $trace["line"])); ?>
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</li>
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<?php endforeach; ?>
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</ol>
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<?php endif; ?>
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<?php if (!logged_in() and ADMIN and $code == 403): ?>
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<hr>
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<a class="big" href="<?php echo $chyrp_url.'/admin/?action=login'; ?>">
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<?php echo __("Log in"); ?>
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</a>
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<?php elseif (isset($_SESSION['redirect_to'])): ?>
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<hr>
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<a class="big" href="<?php echo $_SESSION['redirect_to']; ?>">
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<?php echo __("Go back"); ?>
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</a>
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<?php endif; ?>
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</div>
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</body>
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</html>
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<?php
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#---------------------------------------------
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# Output Ends
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#---------------------------------------------
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# Terminate execution.
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exit;
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}
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