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functions.php
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<?php
// Extract and Record PDF full text.
function recordFulltext($id, $file_name) {
if (!is_numeric($id)) {
return "Warning! Invalid item ID.";
}
$file_name = preg_replace('/[^a-zA-z0-9\_\.pdf]/', '', $file_name);
system(select_pdftotext() . ' -enc UTF-8 '
. escapeshellarg(IL_PDF_PATH . DIRECTORY_SEPARATOR . get_subfolder($file_name) . DIRECTORY_SEPARATOR . $file_name)
. ' ' . escapeshellarg(IL_TEMP_PATH . DIRECTORY_SEPARATOR . $file_name . '.txt'));
if (!is_file(IL_TEMP_PATH . DIRECTORY_SEPARATOR . $file_name . ".txt")) {
return "No text found in this PDF.";
}
$string = file_get_contents(IL_TEMP_PATH . DIRECTORY_SEPARATOR . $file_name . ".txt");
unlink(IL_TEMP_PATH . DIRECTORY_SEPARATOR . $file_name . ".txt");
// Replace line breaks with spaces.
$order = array("\r\n", "\n", "\r");
$string = str_replace($order, ' ', $string);
// Strip invalid UTF-8 characters.
$string = preg_replace('/[^\x{0009}\x{000a}\x{000d}\x{0020}-\x{D7FF}\x{E000}-\x{FFFD}]+/u', ' ', $string);
$string = preg_replace('/\s{2,}/ui', ' ', $string);
// Strip non-printing characters.
$string = trim(filter_var($string, FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_LOW));
$dbHandle = database_connect(IL_DATABASE_PATH, 'fulltext');
$id_query = $dbHandle->quote($id);
$fulltext_query = $dbHandle->quote($string);
$dbHandle->beginTransaction();
$dbHandle->exec("DELETE FROM full_text WHERE fileID=$id_query");
// Only record non-empty string.
// If only spaces.
$srting2 = trim($string);
if (!empty($srting2)) {
$dbHandle->exec("INSERT INTO full_text (fileID,full_text) VALUES ($id_query,$fulltext_query)");
$dbHandle->commit();
$dbHandle = null;
} else {
$dbHandle->commit();
$dbHandle = null;
return "This PDF cannot be indexed for full text search.";
}
}
// Send error message to client via AJAX.
function sendError($errorMessage, $statusCode = 500) {
$errorMessage = preg_replace('/[\"\(\)\<\>\@\,\;\:\/\[\]\?\=\{\}\\\]*/', '', $errorMessage);
header('Error-Message: ' . $errorMessage, true, $statusCode);
die();
}
// Send error message to client via AJAX.
function displayError($errorMessage) {
die("<h3 style=\"text-align:center\">Error! $errorMessage</h3>");
}
// get numbered subfolder where file resides
function get_subfolder($file, $dir = null) {
$id = substr($file, 0, 5);
// If just numeric id is passed.
if (is_numeric($id) && strlen($id) < 5) {
$id = str_pad($id, 5, '0', STR_PAD_LEFT);
}
if (is_numeric($id) && strlen($id) === 5) {
$level_1 = substr($id, 0, 1);
$level_2 = substr($id, 1, 1);
// Create the dir, if it does not exist.
if (isset($dir)) {
$dir .= DIRECTORY_SEPARATOR . $level_1 . DIRECTORY_SEPARATOR . $level_2;
if (!is_dir($dir)) {
mkdir($dir, 0755, true);
}
}
return $level_1 . DIRECTORY_SEPARATOR . $level_2;
} else {
return false;
}
}
// Search database and write to history cache tables.
function perform_search($sql) {
global $dbHandle;
global $limit;
global $from;
global $orderby;
global $ordering;
global $result;
global $rows;
global $case;
// Generate table name hash.
$table_name_hash = '';
$table_name_array = $_GET;
$table_name_array['orderby'] = $orderby;
unset($table_name_array['_']);
unset($table_name_array['from']);
unset($table_name_array['limit']);
unset($table_name_array['display']);
$table_name_array['user_id'] = $_SESSION['user_id'];
$table_name_array = array_filter($table_name_array);
ksort($table_name_array);
$table_name_hash = 'search_' . hash('crc32', json_encode($table_name_array));
$_SESSION['display_files'] = $table_name_hash;
// Read db change times.
$db_change = database_change(array(
'library',
'shelves',
'projects',
'projectsusers',
'projectsfiles',
'filescategories',
'notes',
'annotations'
), array('full_text'), array('clipboard'));
$quoted_path = $dbHandle->quote(IL_DATABASE_PATH . DIRECTORY_SEPARATOR . 'history.sq3');
$dbHandle->exec("ATTACH DATABASE $quoted_path as history");
if (isset($_GET['select']) && $_GET['select'] == 'clipboard') {
attach_clipboard($dbHandle);
}
$quoted_path = $dbHandle->quote(IL_DATABASE_PATH . DIRECTORY_SEPARATOR . 'fulltext.sq3');
if ((isset($_GET['browse']) && array_key_exists('Not Indexed', $_GET['browse'])) || (isset($_GET['searchtype']) && $_GET['searchtype'] == 'pdf') || (isset($_GET['searchtype']) && $_GET['searchtype'] == 'global')) {
$dbHandle->exec("ATTACH DATABASE $quoted_path AS fulltextdatabase");
}
$quoted_path = $dbHandle->quote(IL_DATABASE_PATH . DIRECTORY_SEPARATOR . 'discussions.sq3');
if (isset($_GET['browse']) && array_key_exists('Discussed Items', $_GET['browse'])) {
$dbHandle->exec("ATTACH DATABASE $quoted_path AS discussionsdatabase");
}
$dbHandle->exec("CREATE TABLE IF NOT EXISTS history.search_tables ("
. "id INTEGER PRIMARY KEY,"
. "table_name TEXT NOT NULL DEFAULT '',"
. "created TEXT NOT NULL DEFAULT '',"
. "total_rows TEXT NOT NULL DEFAULT '')");
// Delete stale tables.
$dbHandle->beginTransaction();
$result = $dbHandle->query("SELECT id, table_name, created FROM history.search_tables");
$rows = $result->fetchAll(PDO::FETCH_ASSOC);
$result = null;
foreach ($rows as $row) {
if ($row['created'] < $db_change || isset($_GET['browse']['Discussed Items']) || isset($_GET['browse']['Viewed in the last 8 hours'])) {
$dbHandle->exec("DROP TABLE history.`" . $row['table_name'] . "`");
$dbHandle->exec("DELETE FROM history.search_tables WHERE id=" . $row['id']);
}
}
$dbHandle->commit();
$rows = null;
// Check if cache table exists.
$result = $dbHandle->query("SELECT count(*) FROM history.sqlite_master WHERE type='table' AND name='$table_name_hash'");
$table = $result->fetchColumn();
$result = null;
// No. Get all ids ordered + total count and save to history.
// Yes. Do id-based paging.
if ($table == 0) {
$dbHandle->sqliteCreateFunction('regexp_match', 'sqlite_regexp', 3);
if ($case == 1) {
$dbHandle->exec("PRAGMA case_sensitive_like = 1");
}
$dbHandle->exec("CREATE TABLE IF NOT EXISTS history.`" . $table_name_hash . "` "
. "(id INTEGER PRIMARY KEY, itemID INTEGER NOT NULL DEFAULT '')");
$dbHandle->beginTransaction();
$dbHandle->exec("INSERT INTO history.`$table_name_hash` (itemID) " . $sql);
$dbHandle->exec("INSERT INTO history.search_tables(table_name,created,total_rows)"
. " VALUES('$table_name_hash', '" . time() . "', (SELECT count(*) FROM history.`$table_name_hash`))");
$dbHandle->commit();
}
$result = $dbHandle->query("SELECT id,file,authors,title,journal,secondary_title,year,volume,pages,abstract,uid,doi,url,addition_date,rating,bibtex
FROM library WHERE id IN (SELECT itemID FROM history.`$table_name_hash` LIMIT $limit OFFSET $from) $ordering");
$result2 = $dbHandle->query("SELECT total_rows FROM history.search_tables WHERE table_name='$table_name_hash'");
$rows = $result2->fetchColumn();
$result2 = null;
$dbHandle->exec("DETACH history");
$dbHandle->exec("DETACH clipboard");
$dbHandle->exec("DETACH fulltextdatabase");
$dbHandle->exec("PRAGMA shrink_memory");
}
// Attach clipboard database.
function attach_clipboard($dbHandle) {
$clipboard_db = $dbHandle->quote(IL_TEMP_PATH . DIRECTORY_SEPARATOR . 'lib_' . session_id() . DIRECTORY_SEPARATOR . 'clipboard.sq3');
$dbHandle->exec("ATTACH DATABASE $clipboard_db AS clipboard");
$dbHandle->exec("CREATE TABLE IF NOT EXISTS clipboard.files (id INTEGER PRIMARY KEY)");
$dbHandle->exec("CREATE TABLE IF NOT EXISTS clipboard.clipboard_log (ch_time TEXT NOT NULL DEFAULT '')");
$dbHandle->exec("INSERT OR IGNORE INTO clipboard.clipboard_log (rowid, ch_time) VALUES(1, strftime('%s','now'))");
$dbHandle->exec("CREATE TRIGGER IF NOT EXISTS clipboard.trigger_clipboard_delete AFTER DELETE ON files
BEGIN
UPDATE clipboard_log SET ch_time=strftime('%s','now') WHERE rowid=1;
END;");
$dbHandle->exec("CREATE TRIGGER IF NOT EXISTS clipboard.trigger_clipboard_insert AFTER INSERT ON files
BEGIN
UPDATE clipboard_log SET ch_time=strftime('%s','now') WHERE rowid=1;
END;");
}
// ALLOW SUB, SUP, AND MATHML
function lib_htmlspecialchars($input) {
$input = htmlspecialchars($input);
$arr = array('span', 'math', 'maction', 'maligngroup', 'malignmark', 'menclose', 'merror',
'mfenced', 'mfrac', 'mglyph', 'mi', 'mlabeledtr', 'mlongdiv',
'mmultiscripts', 'mn', 'mo,mover', 'mpadded', 'mphantom', 'mroot', 'mrow',
'ms', 'mscarries', 'mscarry', 'msgroup', 'msline', 'mspace', 'msqrt', 'msrow',
'mstack', 'mstyle', 'msub', 'msup', 'msubsup', 'mtable', 'mtd', 'mtext', 'mtr',
'munder', 'munderover', 'sub', 'sup');
foreach ($arr as $tag) {
$input = str_replace('<span class="highlight-search">', '<span class="highlight-search">', $input);
$input = str_replace('<' . $tag . '>', '<' . $tag . '>', $input);
$input = str_replace('</' . $tag . '>', '</' . $tag . '>', $input);
$input = str_replace('<' . $tag . '/>', '<' . $tag . '/>', $input);
}
return $input;
}
// CUSTOM SQLITE ERROR REPORTING
function get_db_error($dbHandle, $f, $l) {
$dbError = $dbHandle->errorInfo();
if (!empty($dbError[1])) {
die('<div style="padding:10px"><b>SQLite Error:</b> ' . $dbError[2]
. '<br><b>File:</b> ' . $f
. '<br><b>Line:</b> ' . $l . '</div>');
}
}
// NEW PASSWORD FORMAT, SHA512 GRACEFULLY DEGRADES TO CRYPTOGRAPHIC MD5 TO MD5 HASH
function generate_encrypted_password($password) {
if (defined('CRYPT_SHA512') && CRYPT_SHA512 == 1) {
if (function_exists('openssl_random_pseudo_bytes')) {
$bytes = openssl_random_pseudo_bytes(8);
$salt = bin2hex($bytes);
} else {
$salt = substr(md5(mt_rand(0, mt_getrandmax())), mt_rand(0, 16), 16);
}
$hash = crypt($password, '$6$rounds=100000$' . $salt . '$');
} elseif (defined('CRYPT_MD5') && CRYPT_MD5 == 1) {
if (function_exists('openssl_random_pseudo_bytes')) {
$bytes = openssl_random_pseudo_bytes(4);
$salt = bin2hex($bytes);
} else {
$salt = substr(md5(mt_rand(0, mt_getrandmax())), mt_rand(0, 24), 8);
}
$hash = crypt($password, '$1$' . $salt . '$');
} else {
if (function_exists('openssl_random_pseudo_bytes')) {
$bytes = openssl_random_pseudo_bytes(4);
$salt = bin2hex($bytes);
} else {
$salt = substr(md5(mt_rand(0, mt_getrandmax())), mt_rand(0, 24), 8);
}
$hash = '$md5$' . $salt . '$' . md5($salt . $password);
}
return $hash;
}
// CHECK PASSWORD (NEW FORMAT)
function check_encrypted_password($dbHandle, $username, $password) {
$password2 = '';
$verdict = FALSE;
// READ PASSWORD FROM DATABASE
$username_quoted = $dbHandle->quote($username);
$result = $dbHandle->query("SELECT password FROM users WHERE username=" . $username_quoted);
$password2 = $result->fetchColumn();
$result = null;
if (strlen($password2) == 32) {
$hash = md5($password);
} else {
$dump = array_values(array_filter(explode('$', $password2)));
// ENCRYPT USERS INPUT WITH CORRECT PROTOCOL AND SALT
if ($dump[0] == '6') {
$hash = crypt($password, '$6$' . $dump[1] . '$' . $dump[2] . '$');
} elseif ($dump[0] == '1') {
$hash = crypt($password, '$1$' . $dump[1] . '$');
} elseif ($dump[0] == 'md5') {
$hash = '$md5$' . $dump[1] . '$' . md5($dump[1] . $password);
}
}
// COMPARE RESULTS, RETURN VERDICT
if ($hash === $password2)
$verdict = TRUE;
// UPGRADE PASSWORD TO NEW FORMAT
if (strlen($password2) == 32 && $verdict) {
$newpassword = generate_encrypted_password($password);
$newpassword = $dbHandle->quote($newpassword);
$username_quoted = $dbHandle->quote($username);
$dbHandle->exec("UPDATE users SET password=" . $newpassword . " WHERE username=" . $username_quoted);
}
return $verdict;
}
function convert_type($input, $from, $to) {
$output = 'article';
if ($input === '')
$input = 'article';
$types = array(
array(
'ilib' => 'article',
'bibtex' => 'article',
'ris' => 'JOUR',
'endnote' => 'Journal Article',
'csl' => 'article-journal'
),
array(
'ilib' => 'book',
'bibtex' => 'book',
'ris' => 'BOOK',
'endnote' => 'Book',
'csl' => 'book'
),
array(
'ilib' => 'chapter',
'bibtex' => 'incollection',
'ris' => 'CHAP',
'endnote' => 'Book Section',
'csl' => 'chapter'
),
array(
'ilib' => 'conference',
'bibtex' => 'inproceedings',
'ris' => 'CONF',
'endnote' => 'Conference Paper',
'csl' => 'paper-conference'
),
array(
'ilib' => 'conference',
'bibtex' => 'conference',
'ris' => 'CONF',
'endnote' => 'Conference Paper',
'csl' => 'paper-conference'
),
array(
'ilib' => 'manual',
'bibtex' => 'manual',
'ris' => 'STAND',
'endnote' => 'Standard',
'csl' => 'article-journal'
),
array(
'ilib' => 'thesis',
'bibtex' => 'phdthesis',
'ris' => 'THES',
'endnote' => 'Thesis',
'csl' => 'thesis'
),
array(
'ilib' => 'thesis',
'bibtex' => 'mastersthesis',
'ris' => 'THES',
'endnote' => 'Thesis',
'csl' => 'thesis'
),
array(
'ilib' => 'patent',
'bibtex' => 'patent',
'ris' => 'PAT',
'endnote' => 'Patent',
'csl' => 'patent'
),
array(
'ilib' => 'electronic',
'bibtex' => 'electronic',
'ris' => 'ELEC',
'endnote' => 'Electronic Source',
'csl' => 'webpage'
),
array(
'ilib' => 'unpublished',
'bibtex' => 'unpublished',
'ris' => 'UNPB',
'endnote' => 'Unpublished Work',
'csl' => 'manuscript'
),
array(
'ilib' => 'report',
'bibtex' => 'techreport',
'ris' => 'RPRT',
'endnote' => 'Report',
'csl' => 'report'
)
);
foreach ($types as $type) {
if (strtolower($type[$from]) == strtolower($input))
$output = $type[$to];
}
return $output;
}
function cache_name() {
if (isset($_SESSION['limit']))
$clipboard[] = $_SESSION['limit'];
if (isset($_SESSION['orderby']))
$clipboard[] = $_SESSION['orderby'];
if (isset($_SESSION['display']))
$clipboard[] = $_SESSION['display'];
if (isset($_SESSION['pdfviewer']))
$clipboard[] = $_SESSION['pdfviewer'];
$md5_cache_array = array_merge($_POST, $_GET, $clipboard);
unset($md5_cache_array['_']);
unset($md5_cache_array['proxystr']);
ksort($md5_cache_array);
$md5_cache_string = serialize($md5_cache_array);
$md5_cache = md5(__FILE__ . $md5_cache_string);
$cache_name = 'page_' . $md5_cache;
$cache_name = IL_TEMP_PATH . DIRECTORY_SEPARATOR . 'lib_' . session_id() . DIRECTORY_SEPARATOR . $cache_name;
return $cache_name;
}
function database_change() {
$ch_time = 0;
$ch_time2 = 0;
$ch_time3 = 0;
$tables = array();
$tables2 = array();
$tables3 = array();
$tables_arr = func_get_args();
if (isset($tables_arr[0]))
$tables = (array) $tables_arr[0];
if (isset($tables_arr[1]))
$tables2 = (array) $tables_arr[1];
if (isset($tables_arr[2]))
$tables3 = (array) $tables_arr[2];
// READ DATABASE MTIME
if (count($tables) > 0) {
foreach ($tables as $table) {
$query_arr[] = "ch_table='" . $table . "'";
}
$query_str = join(' OR ', $query_arr);
$dbHandle_t = database_connect(IL_DATABASE_PATH, 'library');
$result_t = $dbHandle_t->query("SELECT max(ch_time) FROM library_log
WHERE " . $query_str);
$ch_time = $result_t->fetchColumn();
$result_t = null;
$dbHandle_t = null;
}
if (count($tables2) > 0) {
foreach ($tables2 as $table) {
$query_arr[] = "ch_table='" . $table . "'";
}
$query_str = join(' OR ', $query_arr);
$dbHandle_t = database_connect(IL_DATABASE_PATH, 'fulltext');
$result_t = $dbHandle_t->query("SELECT max(ch_time) FROM fulltext_log
WHERE " . $query_str);
$ch_time2 = $result_t->fetchColumn();
$result_t = null;
$dbHandle_t = null;
}
if (count($tables3) > 0) {
$dbHandle_t = database_connect(IL_DATABASE_PATH, 'library');
attach_clipboard($dbHandle_t);
$result_t = $dbHandle_t->query("SELECT ch_time FROM clipboard.clipboard_log");
$ch_time3 = $result_t->fetchColumn();
$result_t = null;
$dbHandle_t = null;
}
return max($ch_time, $ch_time2, $ch_time3);
}
function cache_start($ch_time) {
global $cache_name;
$mtime = 0;
// READ CACHE MTIME
if (is_file($cache_name))
$mtime = filemtime($cache_name);
// EITHER SHOW CACHED PAGE OR CONTINUE
if ($ch_time < $mtime) {
if (file_exists($cache_name)) {
$cached_string = file_get_contents($cache_name);
echo $cached_string;
exit();
}
}
ob_start();
}
function cache_store() {
global $cache_name;
// GET BUFFER CONTENTS
$bufferContent = ob_get_contents();
ob_end_flush();
// STORE BUFFER INTO CACHE
file_put_contents($cache_name, $bufferContent);
}
function graphical_abstract($file) {
$filename = sprintf("%05d", intval($file));
$filename_array = glob(IL_SUPPLEMENT_PATH . DIRECTORY_SEPARATOR . get_subfolder($filename) . DIRECTORY_SEPARATOR . $filename . 'graphical_abstract.*');
if (!empty($filename_array[0]))
return $filename_array[0];
}
function get_username($dbHandle, $userID) {
$path_q = $dbHandle->quote(IL_USER_DATABASE_PATH . DIRECTORY_SEPARATOR . 'users.sq3');
$dbHandle->exec("ATTACH DATABASE " . $path_q . " AS usersdatabase");
$query = $dbHandle->quote($userID);
$result = $dbHandle->query("SELECT usersdatabase.users.username AS username FROM usersdatabase.users WHERE userID = $query LIMIT 1");
$username = $result->fetchColumn();
$dbHandle->exec("DETACH DATABASE usersdatabase");
return $username;
}
/////////////create, upgrade, or connect to database//////////////////////
function database_connect($database_path, $database_name) {
global $dbHandle;
/////////////connect to database//////////////////////
try {
$dbHandle = new PDO('sqlite:' . $database_path . DIRECTORY_SEPARATOR . $database_name . '.sq3');
} catch (PDOException $e) {
print "Error: " . $e->getMessage() . "<br/>";
print "PHP extensions PDO and PDO_SQLite must be installed.";
die();
}
$dbHandle->sqliteCreateFunction('search_strip_tags', 'sqlite_strip_tags', 1);
return $dbHandle;
}
/////////////sqlite_regexp//////////////////////
function sqlite_regexp($string1, $string2, $case) {
if ($case == 1) {
$pattern = '/([^a-zA-Z0-9]|^)' . $string2 . '([^a-zA-Z0-9]|$)/u';
} else {
$pattern = '/([^a-zA-Z0-9]|^)' . $string2 . '([^a-zA-Z0-9]|$)/ui';
}
if (preg_match($pattern, $string1) > 0) {
return true;
} else {
return false;
}
}
/////////////sqlite_strip_tags//////////////////////
function sqlite_strip_tags($string) {
return html_entity_decode(strip_tags($string), ENT_QUOTES, 'UTF-8');
}
/////////////sqlite_levenshtein//////////////////////
function sqlite_levenshtein($string1, $string2) {
$replacements = array('.', '&', 'and');
$string1 = str_ireplace($replacements, '', $string1);
$string2 = str_ireplace($replacements, '', $string2);
if (stripos($string1, 'the ') === 0)
$string1 = substr($string1, 4);
if (stripos($string2, 'the ') === 0)
$string2 = substr($string2, 4);
return levenshtein($string1, $string2);
}
/////////////select pdftotext//////////////////////
function select_pdftotext() {
$path = __DIR__ . DIRECTORY_SEPARATOR . 'bin' . DIRECTORY_SEPARATOR . 'poppler';
$output = 'pdftotext';
if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && is_executable($path . DIRECTORY_SEPARATOR . $output . '.exe')) {
$output = $path . DIRECTORY_SEPARATOR . $output . '.exe';
} elseif (is_executable($path . DIRECTORY_SEPARATOR . $output)) {
$output = $path . DIRECTORY_SEPARATOR . $output;
}
return '"' . $output . '"';
}
/////////////select pdfinfo//////////////////////
function select_pdfinfo() {
$path = __DIR__ . DIRECTORY_SEPARATOR . 'bin' . DIRECTORY_SEPARATOR . 'poppler';
$output = 'pdfinfo';
if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && is_executable($path . DIRECTORY_SEPARATOR . $output . '.exe')) {
$output = $path . DIRECTORY_SEPARATOR . $output . '.exe';
} elseif (PHP_OS == 'Darwin' && is_executable($path . DIRECTORY_SEPARATOR . 'Frameworks' . DIRECTORY_SEPARATOR . $output)) {
$output = $path . DIRECTORY_SEPARATOR . 'Frameworks' . DIRECTORY_SEPARATOR . $output;
}
return '"' . $output . '"';
}
/////////////select pdftohtml//////////////////////
function select_pdftohtml() {
$path = __DIR__ . DIRECTORY_SEPARATOR . 'bin' . DIRECTORY_SEPARATOR . 'poppler';
$output = 'pdftohtml';
if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && is_executable($path . DIRECTORY_SEPARATOR . $output . '.exe')) {
$output = $path . DIRECTORY_SEPARATOR . $output . '.exe';
} elseif (PHP_OS == 'Darwin' && is_executable($path . DIRECTORY_SEPARATOR . 'Frameworks' . DIRECTORY_SEPARATOR . $output)) {
$output = $path . DIRECTORY_SEPARATOR . 'Frameworks' . DIRECTORY_SEPARATOR . $output;
}
return '"' . $output . '"';
}
/////////////select pdfdetach//////////////////////
function select_pdfdetach() {
$path = __DIR__ . DIRECTORY_SEPARATOR . 'bin' . DIRECTORY_SEPARATOR . 'poppler';
$output = 'pdfdetach';
if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && is_executable($path . DIRECTORY_SEPARATOR . $output . '.exe')) {
$output = $path . DIRECTORY_SEPARATOR . $output . '.exe';
} elseif (is_executable($path . DIRECTORY_SEPARATOR . $output)) {
$output = $path . DIRECTORY_SEPARATOR . $output;
}
return '"' . $output . '"';
}
/////////////select ghostscript//////////////////////
function select_ghostscript() {
$path = __DIR__ . DIRECTORY_SEPARATOR . 'bin' . DIRECTORY_SEPARATOR . 'gs';
$output = 'gs';
if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && is_executable($path . DIRECTORY_SEPARATOR . $output . 'win32c.exe')) {
$output = $path . DIRECTORY_SEPARATOR . $output . 'win32c.exe';
} elseif (is_executable($path . DIRECTORY_SEPARATOR . $output)) {
$output = $path . DIRECTORY_SEPARATOR . $output;
}
return '"' . $output . '"';
}
/////////////select tesseract//////////////////////
function select_tesseract() {
$output = 'tesseract';
if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
$output = '%PROGRAMFILES%\\Tesseract-OCR\\tesseract.exe';
}
return '"' . $output . '"';
}
/////////////select soffice//////////////////////
function select_soffice() {
$output = 'soffice';
if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
if (!empty($_SESSION['soffice_path'])) {
$output = $_SESSION['soffice_path'] . DIRECTORY_SEPARATOR . 'soffice.exe';
} else {
$output = '%PROGRAMFILES%\\LibreOffice 4\\program\\soffice.exe';
}
}
return '"' . $output . '"';
}
/**
*
* Check if URL is safe.
*
* @param string $url
* @return boolean
*
*/
function isSafeUrl($url) {
$url = trim($url);
$host = parse_url($url, PHP_URL_HOST);
// Host required.
if ($host === null) {
return false;
}
// Prevent IP based addresses and localhost.
if ($host === 'localhost'
|| !filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_HOST_REQUIRED)
|| filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)
|| filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
return false;
}
// Deal with wildcard DNS.
$ip = gethostbyname($host);
$ip = ip2long($ip);
if($ip === false){
return false;
}
$is_inner_ipaddress =
ip2long('127.0.0.0') >> 24 === $ip >> 24 or
ip2long('10.0.0.0') >> 24 === $ip >> 24 or
ip2long('172.16.0.0') >> 20 === $ip >> 20 or
ip2long('169.254.0.0') >> 16 === $ip >> 16 or
ip2long('192.168.0.0') >> 16 === $ip >> 16;
if($is_inner_ipaddress){
return false;
}
return true;
}
/**
*
* GET request to fetch resources from the web.
*
* @param string $url
* @param string $proxy_name
* @param string $proxy_port
* @param string $proxy_username
* @param string $proxy_password
* @return string
*
*/
function getFromWeb($url, $proxy_name, $proxy_port, $proxy_username, $proxy_password, $referer = '', $number = 0) {
// Check URL.
if (isSafeUrl($url) === false) {
return '';
}
// Max number of redirects.
if ($number > 5) {
return '';
}
$curl = curl_init();
if (!empty($proxy_name) && !empty($proxy_port)) {
// enable NTLM proxy authentication
// curl_setopt($curl, CURLOPT_PROXYAUTH, CURLAUTH_NTLM);
curl_setopt($curl, CURLOPT_PROXY, "$proxy_name:$proxy_port");
if (!empty($proxy_username) && !empty($proxy_password)) {
curl_setopt($curl, CURLOPT_PROXYUSERPWD, "$proxy_username:$proxy_password");
}
}
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_USERAGENT,"$_SERVER[HTTP_USER_AGENT]");
curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($curl, CURLOPT_TIMEOUT, 30);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_HEADER, 1);
if ($referer != '') {
curl_setopt($curl, CURLOPT_REFERER, $referer);
}
// Do not verify TLS certificates on OSes where we don't have the certificate bundle.
if (PHP_OS !== 'Linux') {
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
}
$response = curl_exec($curl);
curl_close($curl);
// Curl error.
if ($response === false) {
return '';
}
// Split response to headers and body.
$response_parts = explode("\r\n\r\n", $response);
// Redirect if Location found.
if (strpos($response_parts[0], 'Location:') !== false) {
// Extract location.
preg_match('/(Location:)(.*)/', $response_parts[0], $matches);
$location = trim($matches[2]);
// Check if Location is a relative URL.
if (parse_url($location, PHP_URL_HOST) === null) {
// Combine new relative URL ($location) with the previous URL ($url).
// Is there a user:password?
$user_pass = '';
$url_user = parse_url($url, PHP_URL_USER);
$url_pass = parse_url($url, PHP_URL_PASS);
if ($url_user !== null && $url_pass !== null) {
$user_pass = "$url_user:$url_pass@";
}
// Is there a port?
$port = parse_url($url, PHP_URL_PORT) === null ? '' : ':' . parse_url($url, PHP_URL_PORT);
// Assemble new URL.
$new_url = parse_url($url, PHP_URL_SCHEME) . '://'
. $user_pass
. parse_url($url, PHP_URL_HOST)
. $port
. $location;
} else {
// Check if Location is a protocol-relative link.
if (parse_url($location, PHP_URL_SCHEME) === null) {
// Add scheme from the previous URL ($url).
$new_url = parse_url($url, PHP_URL_SCHEME) . ":$location";
} else {
// New URL is a fully qualified URL.
$new_url = $location;
}
}
return getFromWeb($new_url, $proxy_name, $proxy_port, $proxy_username, $proxy_password, $url, $number + 1);
}
// Return response body.
return $response_parts[1];
}
/////////////proxy_simplexml_load_file//////////////////////
function proxy_simplexml_load_file($url, $proxy_name, $proxy_port, $proxy_username, $proxy_password) {
$xml = false;
$xml_string = '';
$xml_string = getFromWeb($url, $proxy_name, $proxy_port, $proxy_username, $proxy_password);
$xml = simplexml_load_string($xml_string);
return $xml;
}
//FETCH METADATA FROM NASA ADS
function fetch_from_nasaads($doi, $nasa_id) {
global $proxy_name, $proxy_port, $proxy_username, $proxy_password, $response;
if (!empty($nasa_id))
$lookfor = 'bibcode=' . urlencode($nasa_id);
if (!empty($doi))
$lookfor = 'doi=' . urlencode($doi);
$request_url = "http://adsabs.harvard.edu/cgi-bin/abs_connect?" . $lookfor . "&data_type=XML&return_req=no_params&start_nr=1&nr_to_return=1";
$xml = proxy_simplexml_load_file($request_url, $proxy_name, $proxy_port, $proxy_username, $proxy_password);
if (empty($xml))
die('Error! I, Librarian could not connect with an external web service. This usually indicates that you access the Web through a proxy server.
Enter your proxy details in Tools->Settings. Alternatively, the external service may be temporarily down. Try again later.');
foreach ($xml->attributes() as $a => $b) {
if ($a == 'selected') {