gfm.php

<?php
require_once ('smart-match.inc');
require_once ('wiki-pages.php');
require_once ('wiki-history.php');
require_once ('http.php');
require_once ('cache.php');

// create an HTTP client with the proxy configuration file 'proxy.config';
// if this file is not available, no proxy is used
$base_client = new HttpClient ('proxy.config');

// cache implementation
$cache_time_secs = 5 * 60; // 5 minutes
$cache_dir = 'wiki';
$cache = new Cache ($cache_time_secs, $cache_dir);

// caching http client, used for wiki page fetches
$client = new CachingHttpClient ($base_client, $cache);

$file = 'Home';
if (isset($_REQUEST) && array_key_exists('f', $_REQUEST)) {
  $file = $_REQUEST['f'];
}
else if (PHP_SAPI === 'cli') {
  $file = $argv[1];
}

function missing ($f) {
    header('HTTP/1.0 404 Not found');
    print '<p>The page you requested is not available: <span class="missing">'
          . $f .
          '</span></p>' .
          '<p>Please report this to the site administrators, stating ' .
          'the URL of the missing page.</p>';
    exit;
}

function ob_callback ($buffer) {
    global $d;
    fwrite ($d, $buffer);
}

$md = file_smart_match (dirname (__FILE__).'/'.$file);
$md = realpath ($md);
if (preg_match ('/(\.html)|(\.php)$/', $md)) {
    require ($md);
    exit;
}

/*
 * Special case for Pages request which is dynamically built
 * from the list of pages in the main Wiki directory
 */
if (strtolower ($file) == 'wiki/pages' ||
    strtolower ($file) == 'wiki/pages.md') {

    $success = wiki_pages ();

    if ($success) {
        require ('wiki/pages.md.html');
    }
    else {
        print 'could not create wiki/pages.md.html page';
    }

    exit;
}

/*
 * Special case for History request which is dynamically built
 * from the list of pages in the main Wiki directory
 */
if (strtolower ($file) == 'wiki/history' ||
    strtolower ($file) == 'wiki/history.md') {

    // generate the wiki history HTML page
    $success = wiki_history ();

    if ($success) {
        require ('wiki/history.md.html');
    }
    else {
        print 'could not create wiki/history.md.html page';
    }
    exit;
}

/* If this is a simple wiki/ request (not in a sub-directory), redirect to GitHub */
if (preg_match ('#^wiki/#', $file)) {
    try {
        $url = 'https://github.com/crosswalk-project/crosswalk-website/'.$file;
        $result = $client->get_url ($url);
        print $result['body'];
    }
    catch (Exception $e) {
        print 'Error: ' . $e->getMessage();
    }
    exit;
}

if (!preg_match ('#^'.dirname (__FILE__).'/#', $md)) {
    missing ($file);
}

$cache = @stat ($md.'.html');
$source = @stat ($md);

if (!$cache || $source['mtime'] > $cache['mtime']) {
    $file = preg_replace ('#^'.dirname (__FILE__).'/#', '', $md);

    $d = @fopen ($md.'.html', 'w');
    if (!$d) {
        print " !!!! Unable to create file $md.html. Check that the server " .
              "has access to the directory.\n";
        exit;
    }

    if (preg_match ('/\.php$/', $file)) {
        /* ob_callback uses $d to write the buffer to */
        ob_start ("ob_callback");
        print '<div id="wiki-content">';
        print '<div class="markdown-body">';
        require ($file);
        print '</div>';
        print '</div>';
        ob_end_flush ();
    } else {
        $file = preg_replace ('/((\.md)|(\.mediawiki)|(\.org)|(\.php))$/',
                                 '', $file);

        // use the non-caching HTTP client to fetch content from the
        // gollum server for every request
        try {
            $result = $base_client->get_url ('http://localhost:4567/'.$file);
            print $result['body'];
            fwrite ($d, $result['body']);
            fflush ($d);
        }
        catch (Exception $e) {
            print $e->getMessage();
        }

        fclose ($d);
    }
}

if (filesize ($md.'.html') == 0) {
    unlink ($md.'.html');
    missing ($md.'.html');
}

require ($md.'.html');