watch local directory for new files in javascript/html5

watch local directory for new files in javascript/html5 - javascript

as title says, is it possible to monitor a local dir in the real filesystem (not html5 sandbox)? I'd like to write an automatic photo uploader that looks for new photos and uploads them.

Potential repeat of Local file access with Javascript.
My understanding is that you can't access the local filesystem directly through a web browser, you have to use an intermediary like the form input tag or drag and drop.
You may be able to get away with accessing the filesystem if you were to use the operating system's javascript interpreter or something like V8. There may also be experimental javascript api's in Chrome that you could look for on the Chrome flags page if thats your browser of choice. That all depends on whether or not you were doing a personal project or something for the web.
Otherwise another scripting language such as PHP, Ruby, or Python would better suit your needs.

You can set a Javascript Timing event. ie: use the setInterval() method.
On the other hand, you can make a button to trigger an onClick event, or any other event, to execute the following code.
NOTE:
If you set an interval, make sure the request was received before sending it again.
For achieving this, you need to check that the readyState of your XML HTTP Request equals 4, as follows:
xmlhttp.readyState == 4
NOTE:
This is for sending the request, parsing the response and putting it in a Javascript array:
xmlhttp = new XMLHttpRequest();
xmlhttp.open("POST", "check_dirs.php", true);
xmlhttp.send();
fileArray = new Array();
xmlhttp.onreadystatechange = function()
{
if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
{
xmlDoc = xmlhttp.responseXML;
fileList = xmlDoc.getElementsByTagName("filesChanged");
while (fileArray.length > 0)
// clean the whole array.
// we want to store the newly generated file list
{
fileArray.pop();
}
for (i = 0; i < fileList.length; i++)
{
fileArray[fileArray.length] = fileList[i].childNodes[0].nodeValue;
}
}
}
Moreover, you will need to write a little PHP script to check your custom directory for files newer than a given date, that could be sent in the request by the way, and send an XML response back, like this:
<?php
(...) // check dir. output $files contain the xml nodes for the files to send
// mockup below
// Get our XML. You can declare it here or even load a file.
$xml_builder = '<?xml version="1.0" encoding="utf-8"?>';
$xml_builder .= $files;
// We send XML via CURL using POST with a http header of text/xml.
$ch = curl_init('http://' . $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI']);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: text/xml'));
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml_builder);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0);
curl_setopt($ch, CURLOPT_REFERER, 'http://www.hello..co.uk');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$ch_result = curl_exec($ch);
curl_close($ch);
/*
echo $ch_result;
*/
?>
Here are some mockup functions to check the directory and build the XML response:
<?php
function analizeDir($dir)
{
if (is_dir($dir))
{
$dir_resource = opendir($dir);
while (false !== ($res = readdir($dir_resource)))
{
if ($res != "." && $res != ".." && $res != "old")
{
if (is_dir($dir . "\\" . $res)) // this is a subforder
{
analizeDir($dir . "\\" . $res);
} else { // this is a file
checkFile($dir . "\\" . $res);
}
}
}
}
}
function checkFile($file)
{
$today = date("Y-m-d H:i:s");
// if the difference in days between today
// and the date of the file is more than 10 days,
// print it in the response
if (date_diff(datemtime($file), $today) > 10)
{
$files .= "<filesChanged>" . $file . "</filesChanged>";
}
}
?>

Related

PHP. saving many pages as png from the command line

I access a page via GET (some of its contents are loaded using jquery), on document.ready this page gets saved as a png.
I want to call this page from a command line using inside the command a for loop to save multiple pngs.
How can I do it?
If I run this on the browser it works fine but the idea is not to make it manually, one by one for each gln code.
curl did not work or am I using it wrong?
<script>
#isset($saveCode)
$("#btnPng").click();
#endisset
$("#btnPng").click(function () {
var selected_date = $('#selectReportDate').find(':selected').val() ;
var selected_gln = $('#selectAccount').find(':selected').val() ;
html2canvas($("#printable"), {
onrendered: function (canvas) {
var url = canvas.toDataURL();
$("<a>", {
href: url,
download: selected_date + selected_gln
})
.on("click", function() {$(this).remove()})
.appendTo("body")[0].click()
}
})
});
</script>
command handle code
public function handle()
{
$date = WeeklyTopSheetsData::max('report_date');
$accounts = REF_GA_GLN::Select('gln')->orderBy('account_name')->get();
foreach ($accounts as $account) {
$auxURL = 'http://localhost:8000/topsheet/' . $account['gln'] . '/' . $date . '/1';
$ch = curl_init();
echo $auxURL;
//set URL and other appropriate options
curl_setopt($ch, CURLOPT_URL, $auxURL);
curl_setopt($ch, CURLOPT_HEADER, 0);
// grab URL and pass it to the browser
curl_exec($ch);
// close cURL resource, and free up system resources
curl_close($ch);
}
echo ' FIN';
}
}

PHP & cURL -- Wierd output

I'm mainly playing with PHP and cURL (the code includes some AJAX and HTML as well).
Architecture:
Front <--> Middle <--> Back <-->MySQL
Description:
In my front section I'm creating an AJAX object and doing a POST request with some data (JSON format) obtain from a Form in the HTML.
Data is sent to my middle server (PHP file). This file receives it and json_decodes it. Determines witch switch case to use and sends it to the back server using cURL.
Back server (PHP file) gets data from POST request and it json_decodes the data. It then proceeds to create MySQL connection checks if passwords match. If the passwords match it echos back a string saying "GRATNED".
Data is passed back to middle server and then to front section where AJAX receives it and displays the string.
So...
All of this works perfect. However, for some reason my data contains a 1 at the end. which messes up my Regular Expression in my JS file.
Can you guys please let me know what option do cURL (if that is the case) do I have to modify or what is it that I'm doing that I get that one(1) and how to remove it.
Thank you guys.
Attached is my code & and images of output...
Front
function whenSubmitt()
{
//Get the data that I want to pass
//JS Object
var parameters = {"case":"login",
"username":document.getElementById("username").value,
"password":document.getElementById("password").value
};
//Make into JSON object
parameters = JSON.stringify(parameters);
//Create AJAX object
var xobj = new XMLHttpRequest();
var method = "POST";
var url = "./front.php";
//Open Connection
xobj.open(method,url,true);
xobj.setRequestHeader("content-type", "application/x-www-form-urlencoded");
//When Submit button is pressed
xobj.onreadystatechange = function()
{
if (xobj.readyState == 4 && xobj.status == 200)
{
var respuestas = xobj.responseText;
document.getElementById("msrv_answer").innerHTML = respuestas;
//window.location.replace(respuestas[0]); //REDIRECTS TO NEW PAGE
}
};
xobj.send(parameters);
}
Front PHP
<?php
function contact_middle_man($parameters)
{
$url = "https://myurl/middle/middle.php";
$obj = curl_init();
curl_setopt($obj, CURLOPT_URL, $url);
curl_setopt($obj, CURLOPT_POST, strlen($parameters));
curl_setopt($obj, CURLOPT_POSTFIELDS, $parameters);
curl_setopt($obj, CURLOPT_RETURNTRANSFER, true); //ALLOWS TO GET ANSWER BACK IN STRING FORMAT, AND DOES NOT OUTPUT ANSWER DIRECTLY.
$ans = curl_exec($obj);
curl_close($obj);
return $ans;
}
/*RECEIVE DATA FROM WEB INTERFACE, USER*/
$indata = file_get_contents("php://input");
/*CONTACT MIDDLE MAN, USE CURL*/
$middle_answ = contact_middle_man($indata);
echo $middle_answ;
?>
Middle PHP
<?php
function http_post_back_server($url, $data)
{
$obj = curl_init();
curl_setopt($obj, CURLOPT_URL, $url);
curl_setopt($obj, CURLOPT_POST, strlen($data));
curl_setopt($obj, CURLOPT_POSTFIELDS, $data);
$ans = curl_exec($obj);
curl_close($obj);
return $ans;
}
/*URL TO BACK SERVER*/
$url_myserver = "https://myurl/loginquery_v2_.php";
/*GLOBAL VARS*/
$back_ans ="";
/*RECEIVE DATA FROM POST REQUEST*/
$indata = file_get_contents("php://input");
$data = json_decode($indata, true);
/*MAKE REQUEST TO SERVERS*/
switch($data["case"]){
case "login":
$back_ans = http_post_back_server($url_myserver,$indata);
break;
default:
$back_ans="NADA";
break;
}
/*ANSWER BACK TO FRON END*/
echo $back_ans;
?>
Back PHP
<?php
/*RECEIVING DATA FROM POST REQUEST */
$indata = file_get_contents("php://input");
/*DATA TO JSON OBJ*/
$indata = json_decode($indata, true);
/*CONNECTION TO DATABASE */
$conn=mysqli_connect(myusername, mypassword);
/*CHECKING DATABASE CONNECTIVITY */
if(mysqli_connect_error())
{ echo "Connection Error: ".mysqli_connect_error; }
/*GOOD CONNECTION ... CONTINUE */
$uname = $indata["username"];
$query="SELECT * FROM alpha WHERE username ='".$indata["username"]."'";
$db_output = mysqli_query($conn,$query);
/* CHECK QUERY RESULT */
if($db_output)
{
/* FETCH RESULTS */
while($result = mysqli_fetch_assoc($db_output))
{
/* COMPARE STORE PWD VS RECEIVED PWD */
if($result["password"] == $indata["password"])
{
/*JSON OBJECT*/
echo "ACCESS GRANTED";
}
/* PASSWORDS DOES NOT MATCH */
else
{
/*JSON OBJECT*/
echo "ACCESS DENY";
}
}
}
/*CLOSE DATABASE CONNECITON */
mysqli_close($conn);
?>
PAGE WITH OUTPUT
Thank you guys.

This is occurring because in your Middle PHP, you are missing the CURLOPT_RETURNTRANSFER option in your curl call. As a result, $ans is assigned the value true (because the curl call is successful) and the output from the curl call (ACCESS GRANTED) is echo'ed into the output from Middle PHP, followed by $back_ans, which being true, when it is echo'ed produces a 1 in the output. Thus the string returned to Front PHP is ACCESS GRANTED1. You can fix this by adding this to Middle PHP:
curl_setopt($obj, CURLOPT_RETURNTRANSFER, true);
Then $ans will be assigned the value ACCESS GRANTED instead of true and your output will be as expected.

Calling PHP wrapper on client side

I´m currently working on a school project, where we are using Apache cordova (HTML, CSS and JS side) and currently our school has a server, where our .php file is located.
In our project, (one of the HTML files) we use API key and an domain address, that we want to get rid off from source code (so other students cant see it). What would be easiest way to execute this?
We´ve been thinking following;
We use the php-file as a wrapper with the following code;
IE.
<?php
function getJson($data){
$decoded = json_decode($data);
if (isset($decoded)){
// Toteutusten haku
$url = "URL THAT WE DONT WANT TO BE SEEN";
$apiKey = "API KEY GOES HERE";
// curl
$ch = curl_init($url);
// curl_exec returnsanswer (not boolean)
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// Asets api key, ":"
curl_setopt($ch, CURLOPT_USERPWD, $apiKey.":");
// Setting message - JSON
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
// Sets false if necessary
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
// Sends request
$responseJson = curl_exec($ch);
return $responseJson;
curl_close($ch); //close session
**}
}
?>
And in HTML file we have code snippets that looks like following;
// B building rooms
if (buildingcode.startsWith("B", 5)) {
var requestB = new XMLHttpRequest();
requestB.onreadystatechange = function () {
if (requestB.readyState === 4) {
if (requestB.status === 200) {
try {
var jsonB = JSON.parse(requestB.responseText);
for (var fb = 0; fb < jsonB.resources.length; fb++) {
var resB = jsonB.resources[fb];
if (resB.type === "room") {
if (bTilat.indexOf("code")) {
bTilat.push(resB.code + resB.name.slice(resB.name.indexOf(' ('), 50));
}
}
}
} catch (e) {
console.log(e.message);
return;
}
}
}
//console.log(bTilat);
};
requestB.open("GET", 'THIS PART HAS THE DOMAIN WE WANT TO HIDE', true, "THIS PART HAS THE API WE WANT TO HIDE", "");
requestB.send(null);
}
So my question is following; I guess we need to get rid off
requestB.open("GET", 'THIS PART HAS THE DOMAIN WE WANT TO HIDE', true, "THIS PART HAS THE API WE WANT TO HIDE", "");
requestB.send(null);
From html, but how do we request the code from wrapper?
Thank you in advance.

php session is randomly lost and cant understand why

I paid a programmer to make a shop basket script to work with Spreadshirt API. Everything is working perfectly, except that the basket keeps emptying itself. I think the session is lost at some point so the script creates another BasketId.
I tried to find if there was a specific reason it was happening, without any success... I can't reproduce the bug. It just happens randomly without any reason. Closing the browser, resetting apache or even the whole webserver won't provoke session lost.
I've got two different scripts working with cookies on the same domain and they don't have any problem (one is a cookie for the admin login session and the other cookie is to save the user's last viewed articles on the shop)
I tried all solutions found on google without any success : editing php.ini , forcing ini settings through php, tried the htaccess way, ...
Here's the "sessions" part of my phpinfo: http://gyazo.com/168e2144ddd9ee368a05754dfd463021
shop-ajax.php (session handling # line 18)
ini_set('session.cookie_domain', '.mywebsite.com' );
header("Pragma: no-cache");
header("Cache-Control: no-store, no-cache, max-age=0, must-revalidate");
$language = addslashes($_GET['l']);
$shopid = addslashes($_GET['shop']);
// if($_SERVER['HTTP_X_REQUESTED_WITH'] != 'XMLHttpRequest') {
// die("no direct access allowed");
// }
if(!session_id()) {
$lifetime=60 * 60 * 24 * 365;
$domain = ".mywebsite.com";
session_set_cookie_params($lifetime,"/",$domain);
#session_start();
}
// Configuration
$config['ShopSource'] = "com";
$config['ShopId'] = $shopid;
$config['ShopKey'] = "*****";
$config['ShopSecret'] = "*****";
/*
* add an article to the basket
*/
if (isset($_POST['size']) && isset($_POST['appearance']) && isset($_POST['quantity'])) {
/*
* create an new basket if not exist
*/
if (!isset($_SESSION['basketUrl'])) {
/*
* get shop xml
*/
$stringApiUrl = 'http://api.spreadshirt.'.$config['ShopSource'].'/api/v1/shops/' . $config['ShopId'];
$stringXmlShop = oldHttpRequest($stringApiUrl, null, 'GET');
if ($stringXmlShop[0]!='<') die($stringXmlShop);
$objShop = new SimpleXmlElement($stringXmlShop);
if (!is_object($objShop)) die('Basket not loaded');
/*
* create the basket
*/
$namespaces = $objShop->getNamespaces(true);
$basketUrl = createBasket('net', $objShop, $namespaces);
$_SESSION['basketUrl'] = $basketUrl;
$_SESSION['namespaces'] = $namespaces;
/*
* get the checkout url
*/
$checkoutUrl = checkout($_SESSION['basketUrl'], $_SESSION['namespaces']);
// basket language workaround
if ($language=="fr") {
if (!strstr($checkoutUrl,'/fr')) {
$checkoutUrl = str_replace("spreadshirt.com","spreadshirt.com/fr",$checkoutUrl);
}
}
$_SESSION['checkoutUrl'] = $checkoutUrl;
}
/*
Workaround for not having the appearance id :(
*/
if ($_POST['appearance']==0) {
$stringApiArticleUrl = 'http://api.spreadshirt.'.$config['ShopSource'].'/api/v1/shops/' . $config['ShopId'].'/articles/'.intval($_POST['article']).'?fullData=true';
$stringXmlArticle = oldHttpRequest($stringApiArticleUrl, null, 'GET');
if ($stringXmlArticle[0]!='<') die($stringXmlArticle);
$objArticleShop = new SimpleXmlElement($stringXmlArticle);
if (!is_object($objArticleShop)) die('Article not loaded');
$_POST['appearance'] = intval($objArticleShop->product->appearance['id']);
}
/*
* article data to be sent to the basket resource
*/
$data = array(
'articleId' => intval($_POST['article']),
'size' => intval($_POST['size']),
'appearance' => intval($_POST['appearance']),
'quantity' => intval($_POST['quantity']),
'shopId' => $config['ShopId']
);
/*
* add to basket
*/
addBasketItem($_SESSION['basketUrl'] , $_SESSION['namespaces'] , $data);
$basketData = prepareBasket();
echo json_encode(array("c" => array("u" => $_SESSION['checkoutUrl'],"q" => $basketData[0],"l" => $basketData[1])));
}
// no call, just read basket if not empty
if (isset($_GET['basket'])) {
if (array_key_exists('basketUrl',$_SESSION) && !empty($_SESSION['basketUrl'])) {
$basketData = prepareBasket();
echo json_encode(array("c" => array("u" => $_SESSION['checkoutUrl'],"q" => $basketData[0],"l" => $basketData[1])));
} else {
echo json_encode(array("c" => array("u" => "","q" => 0,"l" => "")));
}
}
function prepareBasket() {
$intInBasket=0;
if (isset($_SESSION['basketUrl'])) {
$basketItems=getBasket($_SESSION['basketUrl']);
if(!empty($basketItems)) {
foreach($basketItems->basketItems->basketItem as $item) {
$intInBasket += $item->quantity;
}
}
}
$l = "";
$pQ = parse_url($_SESSION['checkoutUrl']);
if (preg_match("#^basketId\=([0-9a-f\-])*$#i", $pQ['query'])) {
$l = $pQ['query'];
}
return array($intInBasket,$l);
}
// Additional functions
function addBasketItem($basketUrl, $namespaces, $data) {
global $config;
$basketItemsUrl = $basketUrl . "/items";
$basketItem = new SimpleXmlElement('<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<basketItem xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://api.spreadshirt.net">
<quantity>' . $data['quantity'] . '</quantity>
<element id="' . $data['articleId'] . '" type="sprd:article" xlink:href="http://api.spreadshirt.'.$config['ShopSource'].'/api/v1/shops/' . $data['shopId'] . '/articles/' . $data['articleId'] . '">
<properties>
<property key="appearance">' . $data['appearance'] . '</property>
<property key="size">' . $data['size'] . '</property>
</properties>
</element>
<links>
<link type="edit" xlink:href="http://' . $data['shopId'] .'.spreadshirt.' .$config['ShopSource'].'/-A' . $data['articleId'] . '"/>
<link type="continueShopping" xlink:href="http://' . $data['shopId'].'.spreadshirt.'.$config['ShopSource'].'"/>
</links>
</basketItem>');
$header = array();
$header[] = createAuthHeader("POST", $basketItemsUrl);
$header[] = "Content-Type: application/xml";
$result = oldHttpRequest($basketItemsUrl, $header, 'POST', $basketItem->asXML());
}
function createBasket($platform, $shop, $namespaces) {
$basket = new SimpleXmlElement('<basket xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://api.spreadshirt.net">
<shop id="' . $shop['id'] . '"/>
</basket>');
$attributes = $shop->baskets->attributes($namespaces['xlink']);
$basketsUrl = $attributes->href;
$header = array();
$header[] = createAuthHeader("POST", $basketsUrl);
$header[] = "Content-Type: application/xml";
$result = oldHttpRequest($basketsUrl, $header, 'POST', $basket->asXML());
$basketUrl = parseHttpHeaders($result, "Location");
return $basketUrl;
}
function checkout($basketUrl, $namespaces) {
$basketCheckoutUrl = $basketUrl . "/checkout";
$header = array();
$header[] = createAuthHeader("GET", $basketCheckoutUrl);
$header[] = "Content-Type: application/xml";
$result = oldHttpRequest($basketCheckoutUrl, $header, 'GET');
$checkoutRef = new SimpleXMLElement($result);
$refAttributes = $checkoutRef->attributes($namespaces['xlink']);
$checkoutUrl = (string)$refAttributes->href;
return $checkoutUrl;
}
/*
* functions to build headers
*/
function createAuthHeader($method, $url) {
global $config;
$time = time() *1000;
$data = "$method $url $time";
$sig = sha1("$data ".$config['ShopSecret']);
return "Authorization: SprdAuth apiKey=\"".$config['ShopKey']."\", data=\"$data\", sig=\"$sig\"";
}
function parseHttpHeaders($header, $headername) {
$retVal = array();
$fields = explode("\r\n", preg_replace('/\x0D\x0A[\x09\x20]+/', ' ', $header));
foreach($fields as $field) {
if (preg_match('/(' . $headername . '): (.+)/m', $field, $match)) {
return $match[2];
}
}
return $retVal;
}
function getBasket($basketUrl) {
$header = array();
$basket = "";
if (!empty($basketUrl)) {
$header[] = createAuthHeader("GET", $basketUrl);
$header[] = "Content-Type: application/xml";
$result = oldHttpRequest($basketUrl, $header, 'GET');
$basket = new SimpleXMLElement($result);
}
return $basket;
}
function oldHttpRequest($url, $header = null, $method = 'GET', $data = null, $len = null) {
switch ($method) {
case 'GET':
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, false);
if (!is_null($header)) curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
break;
case 'POST':
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt($ch, CURLOPT_POST, true); //not createBasket but addBasketItem
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
break;
}
$result = curl_exec($ch);
curl_close($ch);
return $result;
}
?>
There's also 2 other parts of the script : a form to add a sample tshirt to the basket (example.php) and a script to call the ajax (shop-controller.js). Can post it if needed but there's no session handling stuff.
update - Maybe the problem is not related to sessions. The BasketId is lost, but PHPSESSID stays the same in the browser cookies.
I did the following tests for the last 3 days (tested with diferent computers and browsers):
Empty browser cookies then start a new session during the afternoon
Add 1 item to basket, i write down the BasketId and check the browsers cookies to write down the PHPSESSID
Usually always around midnight, the basket empty itself
PHPSESSID stays the same in my browser cookies, even after basket empty itself
However the BASKETID is not the same, the one used during the afternoon is lost and a new one is regenerated
Server is CentOS 5.9 - PHP Version 5.2.9 (from OVH). Dedicated server on a dedicated IP.

First you need to find if the problem is in session's garbage collection or a logical error within the code. For that, you can:
// Add this right after session_start()
if (!isset($_SESSION['mySessionCheck'])) {
$_SESSION['mySessionCheck'] = "This session (" . session_id() . ") started " . date("Y-m-d H:i:s");
}
// For HTML pages, add this:
echo '<!-- ' . $_SESSION['mySessionCheck'] . ' -->';
// For AJAX pages, add "mySessionCheck" to the JSON response:
echo json_encode(
array(
"c" => array(
"u" => $_SESSION['checkoutUrl'],
"q" => $basketData[0],
"l" => $basketData[1]
),
"mySessionCheck" => $_SESSION['mySessionCheck']
)
);
If this message changes at the same time the basket empties, then you'll know for sure it's a problem with PHP sessions.
In that case, there are a few things you can try:
1) You are doing
$lifetime=60 * 60 * 24 * 365;
$domain = ".mywebsite.com";
session_set_cookie_params($lifetime,"/",$domain);
#session_start();
But according to a user contributed note from PHP.net docs:
PHP's Session Control does not handle session lifetimes correctly when using session_set_cookie_params().
So you may try using setcookie() instead:
$lifetime=60 * 60 * 24 * 365;
session_start();
setcookie(session_name(),session_id(),time()+$lifetime);
Even though it's a 4 year old note as pointed in the comments, I tested it and it still happens (I'm on PHP 5.5.7, Windows Server 2008, IIS/7.5). Only setcookie() produced the HTTP headers to change the expiring date (example setting $lifetime to 600):
Set-Cookie: PHPSESSID=(the id); expires=Mon, 22-Jun-2015 15:03:17 GMT; Max-Age=600
2) If you're using a Debian servers or some derivative, they use a cron job to clear out PHP sessions, so you might try:
Increasing server's configured maxlifetime;
Saving your sessions somewhere else;
Using memcached.
3) To find out if there is some process clearing your sessions, you can place a watch on the directory where the session files are stored (actual path varies from server to server, use session_save_path to find out the location on yours). I'm no server admin, but I've read you can use auditctl for that, just make sure you log who made the changes to your files.
4) If you don't have access to server configuration, or don't want to depend on server config (good if you switch hosts), you can implement your own session handler. Check out this example by Pedro Gimeno.

You put only #session_start(); in the top of your all script.
An also put in the top of your ajax script.
Example Like following:
#session_start();
// you may use session script here or header file
include("header.php");
//some code. you may use session script here or header file
include("main.php");
//-----------next code

I post here, even if is an old post, in case someone experience this problem, check in php.ini session.gc_maxlifetime, or print ini_get('session.gc_maxlifetime'); you have to set it in your php script or php.ini, on my php version the default is 1440 seconds, I have changed it to 1 month, is enough in my case.
Also after start session you can
setcookie(session_name(),session_id(),time() + $sessionLifetime, "", "", false, true);
I hope this helps.

I my case, I replaced session_destroy(); with session_unset(); and problem was solved.

Get the HTML contents of another frame on another domain

I've read that you cannot read the HTML of another frame if that frame resides on another domain. Is there a way to do this in Javascript? I realise this restriction is for security purposes but my use is legitimate.
Regards
Peter

Are we talking about an iFrame here? If so, could you not get the src attribute of the iFrame (jQuery?) and initiate an ajax request which would return the page, or perhaps hand the src attribute to your own script (PHP/ASP whatever) that uses CURL to glean the information you're after?

Yes you can definitely read the contents of the frame using cross-domain proxy. Essentially you need to create a server-side script that requests the src URL of the frame in question. On the client side, you request this script instead of the src URL (which is on another domain and thereby subject to security restrictions within the browser), passing in the src URL as a parameter.
Server-Side Script
The following is an example with PHP using cURL.
<?php
$target = $_REQUEST['t'];
if (empty($target)) { die 'no url provided'; }
$useragent="Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target);
curl_setopt($ch, CURLOPT_AUTOREFERER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_USERAGENT, $useragent);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$res = curl_exec($ch);
curl_close($ch);
echo $res;
?>
Client-Side Script
On your page, use the following JavaScript function to return the HTML of the target frame
var URL = top.frames.(YOUR FRAME NAME HERE).location;
var xh = null;
if (window.XMLHttpRequest) {
xh = new XMLHttpRequest();
} else if (window.ActiveXObject) {
xh = new ActiveXObject("Microsoft.XMLHTTP");
} else {
alert("Your browser does not support XMLHTTP.");
return false;
}
var ret = null;
xh.onreadystatechange = function() {
if (xh.readyState == 4 && xh.status == 200) {
// do whatever you want with the html here
ret = xh.responseText;
}
}
xh.open("GET", url, false);
xh.send(null);
Let me know if this works for you.

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