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lib_json_requests.php
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lib_json_requests.php
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<?php
/**
* Copyright (C) 2012-2013 Null Team
*
* This software is distributed under multiple licenses;
* see the COPYING file in the main directory for licensing
* information for this specific distribution.
*
* This use of this software may be subject to additional restrictions.
* See the LEGAL file in the main directory for details.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
require_once("debug.php");
$content_sent = false;
function send_content()
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
global $content_sent;
if ($content_sent)
return;
$content_sent = true;
header("Content-type: application/json");
}
function send_error($errcode,$errtext)
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
global $content_sent;
if (!$content_sent)
header("HTTP/1.1 $errcode $errtext");
}
function check_request($method,$secret = "")
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
global $allow_http, $exception_to_https;
if (!isset($allow_http))
$allow_http = false;
$errcode = 0;
$errtext = "";
if ((!isset($_SERVER["HTTPS"]) || $_SERVER["HTTPS"]=="off") && !$allow_http) {
$errcode = 403;
$errtext = "Forbidden";
}
else if (($secret!="") && (!isset($_SERVER["HTTP_X_AUTHENTICATION"]) || $_SERVER["HTTP_X_AUTHENTICATION"]!=$secret)) {
$errcode = 494;
$errtext = "Security Agreement Required";
}
else if ($_SERVER["REQUEST_METHOD"] != $method) {
$errcode = 405;
$errtext = "Method Not Allowed";
}
else if ($_SERVER["CONTENT_TYPE"] != "application/json") {
$errcode = 415;
$errtext = "Unsupported Media Type";
}
if ($errcode != 0) {
header("HTTP/1.1 $errcode $errtext");
?>
<html>
<head>
<title><?php print($errtext); ?></title>
</head>
<body>
<h1><?php print($errtext); ?></h1>
Expecting <b><?php print($method); ?></b> with type <b>application/json</b>
</body>
</html>
<?php
exit;
}
}
function valid_param($param)
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
return ($param !== null) && ($param != "");
}
function arr_to_db($arr, $class_name, $edit_function="edit", $obj_id=NULL)
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
$obj = new $class_name;
$vars = Model::getVariables($class_name);
if (!$vars || !$obj) {
//send_error(501, "Not implemented");
return array(false, "code"=>"2"); // "Not yet implemented"
}
$params = array();
foreach($vars as $name=>$var) {
if (!isset($arr[$name]))
continue;
$value = get_param($arr, $name);
if ($var->isRequired() && !strlen($value)) {
//send_error(406, "Not Acceptable");
return array(false, "code"=>"10");
}
$params[$name] = $value;
}
if ($obj_id != "__no_id") {
$id = ($obj_id) ? $obj_id : $obj->getIdName();
// make sure we have $params[$id] in case class was not correctly defined
if (!isset($params[$id]) || !strlen($params[$id])) {
//send_error(406, "Not Acceptable");
return array(false, "code"=>"10");
}
$db_obj = Model::selection($class_name, array($id=>$params[$id]));
if (count($db_obj)) {
// this object already exists and we should modify it
$obj = $db_obj[0];
if ($edit_function == "edit") {
if ($obj_id)
$res = $obj->edit($params,array($obj_id=>$params[$obj_id]));
else
$res = $obj->edit($params);
} elseif ($edit_function == "fieldupdate") {
$params_to_edit = array();
foreach($arr as $name=>$value) {
if ($name == $obj_id)
continue;
$obj->{$name} = $value;
$params_to_edit[] = $name;
}
$res = $obj->fieldUpdate(array($obj_id=>$params[$obj_id]),$params_to_edit);
} else {
//send_error(500, "Internal Server Error");
return array(false, "code"=>"98"); // Internal Server Error:: called wrong function
}
} else {
$res = $obj->add($params);
}
} else {
$res = $obj->add($params);
}
if (!$res[0]) {
//send_error(406, "Not Acceptable");
return array(false, "code"=>$res[1]);
}
return array(true, "code"=>"0", "obj"=>$obj);
}
function check_response($out)
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
$arr = array();
foreach ($out as $name=>$val) {
if (is_array($val))
$arr[$name] = check_response($val);
else {
if ($name == "error_code" && $val=="")
$val = "0";
$arr[$name] = $val;
}
}
return $arr;
}
function translate_error_to_code($res, $exception_true=false)
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
// if (is_array($res) && count($res)==1 && $res[0]===true)
// return $res;
if (!is_array($res) || (count($res)<2 && (($res[0]===false) || !isset($res[0]))) || !isset($res[0]))
return array(false, "code"=>"99"); // Internal Server Error: wrong result format from called function
if ($res[0] && $exception_true) {
if (!isset($res["code"]))
return array(true);
return array(true, "code"=>$res["code"]); // this code will define a user/contact not success of request
}
elseif ($res[0]/* && !$exception_true*/) {
return $res; // normal success case
} elseif (!$res[0] && $exception_true) {
if (!isset($res["code"])) // succes and default contact already existed
return array(true);
return array(true, "code"=>$res["code"]); // this code will define a user/contact not success of request
}
$new_res = array(false);
if (isset($res[1])) {
if (substr($res[1], -12)==" is required" || substr($res[1], -9)==" not set.")
$new_res["code"] = "10"; // Missing or empty parameters
else
$new_res["code"] = "97";
} elseif (isset($res["code"]))
$new_res["code"] = $res["code"];
else
$new_res["code"] = "99";
// even if error, if more fields set in result (with non numeric key) copy them to response
if (count($res)>2 || (count($res)>1 && !isset($res[1]))) {
foreach ($res as $key=>$val) {
if (!is_numeric($key))
$new_res[$key] = $val;
}
}
return $new_res;
}
function clean_session()
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
global $direct_request;
// taken from comments on php site for session_unset
/* session_unset();
session_destroy();
session_write_close();
setcookie(session_name(),'',0,'/');
session_regenerate_id(true);*/
// Unset all of the session variables.
$_SESSION = array();
if (isset($direct_request))
return;
// If it's desired to kill the session, also delete the session cookie.
// Note: This will destroy the session, and not just the session data!
if (ini_get("session.use_cookies")) {
$params = session_get_cookie_params();
setcookie(session_name(), '', time() - 42000,
$params["path"], $params["domain"],
$params["secure"], $params["httponly"]
);
}
if (isset($_SESSION))
// Finally, destroy the session.
session_destroy();
}
function set_session()
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
global $sesslife_json;
if (isset($sesslife_json))
session_set_cookie_params($sesslife_json);
if (!session_id()) {
$res = session_start();
if (!$res)
return array(false,"code"=>"105");
}
return array(true);
}
function retrieve_json()
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
global $json;
$json = file_get_contents('php://input');
$inp = json_decode($json,true);
if ($inp === null)
return array(false,"code"=>"6");
return array(true,"json"=>$inp);
}
function write_response($out)
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
global $error_codes, $add_newline, $enable_logs, $logs_file;
global $start_time, $med_time;
global $func_name, $class_name, $request_id;
global $json, $used_backup, $current_input;
if (isset($error_codes[$out["code"]]) && !isset($out["message"]))
$out["message"] = $error_codes[$out["code"]];
$out = check_response($out);
send_content();
$o_json = json_encode($out);
print $o_json;
if (isset($add_newline) && in_array($func_name,$add_newline))
print "\n";
$end_time = microtime(true);
if ($enable_logs) {
$day = date("Y-m-d");
$file = str_replace(".txt","$day.txt",$logs_file);
$fh = fopen($file, "a");
if (!$fh) {
print ("Could not open logs file $file");
exit;
}
$aprox_duration = round($end_time - $start_time,4);
$id = (isset($_SESSION["user_id"])) ? ", user_id=".$_SESSION["user_id"] : "";
$captcha = isset($_SESSION["req_captcha"])? ", captcha_sess=".$_SESSION["req_captcha"] : "";
fwrite($fh, "------ ".date("Y-m-d H:i:s").", ip=".$_SERVER['REMOTE_ADDR'].", func=$func_name, class=$class_name"."$id, request_id='$request_id', aprox_duration=$aprox_duration, med_time=$med_time"."$captcha \n");
fwrite($fh, "Json: $json"."\n");
fwrite($fh, "Input: ".str_replace("\n"," ",print_r($current_input,true))."\n");
fwrite($fh, "Output: ".str_replace("\n"," ",print_r($out,true))."\n");
fwrite($fh, "JsonOut: $o_json"."\n");
if (isset($used_backup))
fwrite($fh,$used_backup."\n");
fclose($fh);
}
}
function process_request($inp, $func="arr_to_db", $class_name=NULL, $exit_after_func_ok=false)
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
global $json, $enable_r_logs, $request_id, $r_logs_file;
$request_id = rand();
if ($enable_r_logs) {
$day = date("Y-m-d");
$file = str_replace(".txt","$day.txt",$r_logs_file);
$fh = fopen($file, "a");
if (!$fh)
// "Internal Server Error: Could not open requests logs file."
return array(false, "code"=>"101");
fwrite($fh, "------ ".date("Y-m-d H:i:s").", ip=".$_SERVER['REMOTE_ADDR'].", func=$func, class=$class_name".", request_id='$request_id'\n");
fwrite($fh, "Json: $json"."\n");
fclose($fh);
}
$return_error = get_param($inp,"returnerror");
if (missing_param($return_error)) {
if ($class_name)
$res = $func($inp, $class_name);
else
$res = $func($inp);
} else {
if (substr($return_error,0,7) == "timeout") {
$time = str_replace("timeout:","",$return_error);
// max_execution_time = 30 in php.ini so requester should get timeout
sleep($time);
//print "This should not be seen if you set timeout parameter when making request.";
//exit();
if ($class_name)
$res = $func($inp, $class_name);
else
$res = $func($inp);
} else
$res = array(false, "code"=>$return_error);
}
if (isset($res["obj"]))
unset($res["obj"]);
if (!isset($res[0]))
return array(false, "code"=>"99"); // Internal server error: wrong result format from called function
$res = translate_error_to_code($res);
if ($res[0] && $exit_after_func_ok)
// for get_captcha type of request: don't return anything by default
exit;
if (!$res[0]) {
unset($res[0]);
return $res;
} else
unset($res[0]);
if (!isset($res[1])) {
$ret = array("code"=>"0");
if (count($res))
$ret = array_merge($ret,$res);
return $ret;
} else {
if (!isset($res[1]["code"]))
$res[1]["code"] = 0;
return $res[1];
}
}
// in case backup database connection is used, call this function to record this in the logs
function log_used_backup_conn($connection_index)
{
Debug::func_start(__FUNCTION__,func_get_args(),"ansql");
global $used_backup, $server_id;
$used_backup = "Used backup connection '$connection_index' for server_id=$server_id";
}
?>