function test_config_value()
{
// default value
$this->assertFalse(config_value('BIBTEXBROWSER_NO_DEFAULT'));
// setting to true
bibtexbrowser_configure('BIBTEXBROWSER_NO_DEFAULT', true);
$this->assertTrue(config_value('BIBTEXBROWSER_NO_DEFAULT'));
ob_start();
default_message();
$this->assertEquals('', ob_get_flush());
// setting to false
bibtexbrowser_configure('BIBTEXBROWSER_NO_DEFAULT', false);
$this->assertFalse(config_value('BIBTEXBROWSER_NO_DEFAULT'));
ob_start();
default_message();
$this->assertContains('Congratulations', ob_get_flush());
}
/** @nodoc */
function _zetDB($bibtex_filenames)
{
$db = null;
// Check if magic_quotes_runtime is active
if (get_magic_quotes_runtime()) {
// Deactivate
// otherwise it does not work
set_magic_quotes_runtime(false);
}
// default bib file, if no file is specified in the query string.
if (!isset($bibtex_filenames) || $bibtex_filenames == "") {
default_message();
exit;
}
// first does the bibfiles exist:
// $bibtex_filenames can be urlencoded for instance if they contain slashes
// so we decode it
$bibtex_filenames = urldecode($bibtex_filenames);
// ---------------------------- HANDLING unexistent files
foreach (explode(MULTIPLE_BIB_SEPARATOR, $bibtex_filenames) as $bib) {
// get file extension to only allow .bib files
$ext = pathinfo($bib, PATHINFO_EXTENSION);
// this is a security protection
if (BIBTEXBROWSER_LOCAL_BIB_ONLY && (!file_exists($bib) || strcasecmp($ext, 'bib') != 0)) {
// to automate dectection of faulty links with tools such as webcheck
header('HTTP/1.1 404 Not found');
// escape $bib to prevent XSS
$escapedBib = htmlEntities($bib, ENT_QUOTES);
die('<b>the bib file ' . $escapedBib . ' does not exist !</b>');
}
}
// end for each
// ---------------------------- HANDLING HTTP If-modified-since
// testing with $ curl -v --header "If-Modified-Since: Fri, 23 Oct 2010 19:22:47 GMT" "... bibtexbrowser.php?key=wasylkowski07&bib=..%252Fstrings.bib%253B..%252Fentries.bib"
// and $ curl -v --header "If-Modified-Since: Fri, 23 Oct 2000 19:22:47 GMT" "... bibtexbrowser.php?key=wasylkowski07&bib=..%252Fstrings.bib%253B..%252Fentries.bib"
// save bandwidth and server cpu
// (imagine the number of requests from search engine bots...)
$bib_is_unmodified = isset($_SERVER['HTTP_IF_MODIFIED_SINCE']);
foreach (explode(MULTIPLE_BIB_SEPARATOR, $bibtex_filenames) as $bib) {
$bib_is_unmodified = $bib_is_unmodified && strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) > filemtime($bib);
}
// end for each
if ($bib_is_unmodified && !headers_sent()) {
header("HTTP/1.1 304 Not Modified");
exit;
}
// ---------------------------- HANDLING caching of compiled bibtex files
// for sake of performance, once the bibtex file is parsed
// we try to save a "compiled" in a txt file
$compiledbib = 'bibtexbrowser_' . md5($bibtex_filenames) . '.dat';
$parse = filemtime(__FILE__) > @filemtime($compiledbib);
// do we have a compiled version ?
if (is_file($compiledbib) && is_readable($compiledbib) && filesize($compiledbib) > 0) {
$f = fopen($compiledbib, 'r+');
// some Unix seem to consider flock as a writing operation
//we use a lock to avoid that a call to bibbtexbrowser made while we write the object loads an incorrect object
if (flock($f, LOCK_EX)) {
$s = filesize($compiledbib);
$ser = fread($f, $s);
$db = @unserialize($ser);
flock($f, LOCK_UN);
} else {
die('could not get the lock');
}
fclose($f);
// basic test
// do we have an correct version of the file
if (!is_a($db, 'BibDataBase')) {
unlink($compiledbib);
if (BIBTEXBROWSER_DEBUG) {
die('$db not a BibDataBase. please reload.');
}
$parse = true;
}
} else {
$parse = true;
}
// we don't have a compiled version
if ($parse) {
//echo '<!-- parsing -->';
// then parsing the file
$db = createBibDataBase();
foreach (explode(MULTIPLE_BIB_SEPARATOR, $bibtex_filenames) as $bib) {
$db->load($bib);
}
}
$updated = false;
// now we may update the database
if (!file_exists($compiledbib)) {
@touch($compiledbib);
$updated = true;
// limit case
} else {
foreach (explode(MULTIPLE_BIB_SEPARATOR, $bibtex_filenames) as $bib) {
// is it up to date ? wrt to the bib file and the script
// then upgrading with a new version of bibtexbrowser triggers a new compilation of the bib file
if (filemtime($bib) > filemtime($compiledbib) || filemtime(__FILE__) > filemtime($compiledbib)) {
// echo "updating ".$bib;
$db->update($bib);
$updated = true;
}
}
}
// echo var_export($parse);
// echo var_export($updated);
$saved = false;
// are we able to save the compiled version ?
// note that the compiled version is saved in the current working directory
if (($parse || $updated) && is_writable($compiledbib)) {
// we use 'a' because the file is not locked between fopen and flock
$f = fopen($compiledbib, 'a');
//we use a lock to avoid that a call to bibbtexbrowser made while we write the object loads an incorrect object
if (flock($f, LOCK_EX)) {
// echo '<!-- saving -->';
ftruncate($f, 0);
fwrite($f, serialize($db));
flock($f, LOCK_UN);
$saved = true;
} else {
die('could not get the lock');
}
fclose($f);
}
// end saving the cached verions
//else echo '<!-- please chmod the directory containing the bibtex file to be able to keep a compiled version (much faster requests for large bibtex files) -->';
return array(&$db, $parse, $updated, $saved);
}
