I need to have debugging/logging information for a flash video player.
I need to display the client ip, along with the server ip of the stream... can this be done?
example stream: (actually it's a manifest that, upon load, retrieves the stream)
http://multiplatform-f.akamaihd.net/z/multi/april11/hdworld/hdworld_,512x288_450_b,640x360_700_b,768x432_1000_b,1024x576_1400_m,1280x720_1900_m,1280x720_2500_m,1280x720_3500_m,.mp4.csmil/manifest.f4m
Techs available to me: Javascript, AS3 FLASH.
basically a "whatsmyip" and a reverse ip lookup through flash/javascript.... possible without server side scripts?
Get client IP with JS:
<script type="text/javascript">
function getip(data){
alert(data.ip);
}
</script>
<script type="text/javascript" src="http://jsonip.appspot.com/?callback=getip">
</script>
Or with php:
<?php
echo $_SERVER['REMOTE_ADDR'];
?>
Get server IP only with server side script, like php:
<?php
$ip = gethostbyname('www.example.com');
echo $ip;
?>
I found this online, I don't know if it would help you. Hope it does.
Related
I'm trying to set a cookie in PHP, and then have my JavaScript/jQuery read it. As I've been trying to research the issue I've seen some people talk about server side vs. client side cookies, and other people saying cookies are just cookies and there's no difference. What I do know is that PHP sees the cookies, and JavaScript doesn't.
Here's a simplified version of the PHP file that builds the page and sets the cookies.
<!DOCTYPE html>
<?php
setcookie("card", "", time()+900, '/');
?>
<html>
<body>
<?php
$card = "a string I want in my cookie";
$_COOKIE['card'] = $card;
foreach($_COOKIE as $c => $c_value)
{
echo "Cookie named " . $c . " has value " . $c_value . "<br/>";
}
?>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/jquery.cookie#1.4.1/jquery.cookie.min.js"></script>
<script type = "text/javascript" src = "script.js"></script>
</body>
</html>
This will correctly show the name and value of the cookie on my page. So I know I'm setting something.
But when my JavaScript runs, I don't seem to have any cookies. I tried a couple different ways to get to the value of either all cookies, or just a single target part of the cookie:
var all_cookies = document.cookie;
var aCard = $.cookie('card');
all_cookies shows up with a value of "" when I debug, and aCard just stays undefined.
So do I need to set the cookies differently with PHP? Or read them differently with either JavaScript or jQuery?
PHP's setcookie() function sets an HTTP response header that instructs the browser to set the cookie. This is only possible if you haven't sent any output yet. Calling setcookie() after you have already output the <!DOCTYPE means you should be getting a "Cannot modify header information - headers already sent" warning.
To set a cookie and make it available to Javascript, you need to set it at the very beginning of your script before generating any output:
<?php
$card = "a string I want in my cookie";
setcookie("card", $card, time()+900, '/');
// note from the manual (https://php.net/setcookie):
// Once the cookies have been set, they can be accessed
// on the next page load with the $_COOKIE array.
// ^^^^^^^^^^^^^^^^^^^^^
//
// so the "card" cookie won't be in $_COOKIE until
// the next page load. If you want it in there
// immediately, you need to set it manually:
$_COOKIE['card'] = $card;
?>
<!DOCTYPE html>
<html>
<body>
<?php
foreach($_COOKIE as $c => $c_value)
{
echo "Cookie named " . $c . " has value " . $c_value . "<br/>";
}
?>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/jquery.cookie#1.4.1/jquery.cookie.min.js"></script>
<script type = "text/javascript" src = "script.js"></script>
</body>
</html>
Now that you've used setcookie() before generating any output, the cookie is set properly and Javascript should be able to access it from document.cookie without any trouble.
I am trying to use the solution called in here:
How to keep session alive without reloading page?
Unfortunately I can't get it to work, I have very limited experience with Javascript and jQuery.
This is my index.php
<?php
session_start();
echo session_id();
$_SESSION['id'] = session_id(); //just so there is a variable within the session
?>
EDIT: added jquery library after comment/answer
<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
<script>
setInterval(function(){
$.post('refresh_session.php');
}, 60000);
</script>
And this is the refresh_session.php where I write to a file, so I can test if the file is actually being called.
<?php
session_start();
if (isset($_SESSION['id'])){
$_SESSION['id'] = $_SESSION['id']; // or if you have any algo.
}
$date = new DateTime();
$fp = fopen('data.txt', 'a');
fwrite($fp, $date->format('Y-m-d H:i:s') . " " . session_id() ."\n");
fclose($fp);
?>
If I call refresh_session.php manually, I see the date showing up in data.txt.
If I open up index.php and wait for the data.txt file to change, nothing happens.
What am I missing here?
I don't know why, but after copy-paste your javascript code – I've got strange characters in Code Snipped. It can be charset problem. Code looks good, but bracket only looks like bracket. It's not bracket. What it is? I don't know, but look at that what I've got in Code Snipped after pasting your code:
Code will execute if you write it using good charset. Take that working code:
setInterval(function(){
$.post('refresh_session.php');
alert("dsa");
}, 5000);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
By the way – alert is of course only test, you can delete this.
So, the answer is – check your charset.
I have a php script that import large data from csv files with validations.
For that I need to show progress to the user. I have used Event Streaming for that.
When I echo something, I want it to be transferred to client one by one instead of server sent whole output in bulk.
I had already played around with ob_start(), ob_implicit_flush() & ob_flush(), but they didn't work.
My script is working perfect on another server.
Below server configurations are given:
Server configuration on which the code is not responding as desired, i.e.OS: Linux
PHP Version 5.4.36-0+deb7u3
Server API: CGI/FastCGI
Memory_limit: 128M
output_buffering: no value
As I have said, the code is working properly on another server which has the almost same configuration, i.e.
OS: Linux
PHP Version 5.4.37
Server API: CGI/FastCGI
Memory_limit: 256MB
output_buffering: no value
Below is my sample code for sending event:
<?php
header("Content-Type: text/event-stream");
header("Cache-Control: no-cache");
header("Access-Control-Allow-Origin: *");
$lastEventId = floatval(isset($_SERVER["HTTP_LAST_EVENT_ID"]) ? $_SERVER["HTTP_LAST_EVENT_ID"] : 0);
if ($lastEventId == 0) {
$lastEventId = floatval(isset($_GET["lastEventId"]) ? $_GET["lastEventId"] : 0);
}
echo ":" . str_repeat(" ", 2048) . "\n"; // 2 kB padding for IE
echo "retry: 2000\n";
// event-stream
$i = $lastEventId;
while ($i <= 100) {
if($i==100){
echo "data: stop\n";
ob_flush();
flush();
break;
} else {
echo "id: " . $i . "\n";
echo "data: " . $i . ";\n\n";
ob_flush();
flush();
sleep(1);
}
$i++;
}
?>
Below is my client page on which I need response:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>EventSource example</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<script src="../jquery/eventsource.js"></script>
<script>
var es = new EventSource("events.php");
var listener = function(event) {
console.log(event.data);
var type = event.type;
if (event.data == 'stop') {
es.close();
} else {
var div = document.createElement("div");
div.appendChild(document.createTextNode(type + ": " + (type === "message" ? event.data : es.url)));
document.body.appendChild(div);
}
};
var errlistener = function(event) {
es.close();
}
es.addEventListener("open", listener);
es.addEventListener("message", listener);
es.addEventListener("error", errlistener);
</script>
</head>
<body>
</body>
</html>
Your best method to return chucked data to the browser is to use Web Sockets get the client to open a socket to your file reader then you can chunk the data to the browser without a problem.
Then once it has finished you can close the socket.
a good tutorial for web sockets
http://www.phpbuilder.com/articles/application-architecture/optimization/creating-real-time-applications-with-php-and-websockets.html
with this method you can then if you wanted implement verification so the server is not just sending chunks it's sends the chunks on request by javascript
So your Client could say i need chunk 5 and your server implement something like
$requestedChunk = 5; // this would be set by the javascript sending the request
$chunkSize = 256; // this would be your chunk size;
$readPossition = $requestedChunk * $chunkSize;
Link no longer works so here is one built on Ratchet: https://blog.samuelattard.com/the-tutorial-for-php-websockets-that-i-wish-had-existed/
I had a similar problem. Event streams were working as expected (returning chunks) on a server using the Apache 2.0 Handler but not on a server using FastCGI (returning it in bulk). I assumed that something in FastCGI is the culprit and so tried to resolve the problem by switching to CGI. Now the event stream works as expected.
Whether using CGI or FastCGI the Server API shows up as CGI/FastCGI so I assume that the server it works on for you is running CGI and the server it doesn't work on for you is running FastCGI. Try changing the non-working server to CGI.
As for why it doesn't work in FastCGI I'm not entirely sure but unless it's a necessary requirement and CGI isn't possible then the above solution should work.
Many things can prevent chunked response such as but not limited to;
Proxy or any other buffering mechanism on web server
When "Output buffering" is "on" in php.ini (you should explictly set it to off)
When gzip is enabled on web server
You should check these at first.
My Webapp is running with a https connection / ssl certificate. I need to show pictures to the user. I get the links to the picture by an API request and link them afterwards. Sadly, the pictures address is http, so the browser shows that there are unsecure parts on the site, which mustn't be...
I could download the pictures and link to the proper picture afterwards, but I think this might be a little timeconsuming and not the best way to handle this.
Does somebody know a better solution for this? I'm using php, jquery and javascript.
You'll have to write a proxy on your server and display all the images through it. Basically your URLs should be like:
$url = 'http://ecx.images-amazon.com/images/I/51MU5VilKpL._SL75_.jpg';
$url = urlencode($url);
echo '<img src="/proxy.php?from=' . $url . '">';
and the proxy.php:
$cache = '/path/to/cache';
$url = $_GET['from'];
$hash = md5($url);
$file = $cache . DIRECTORY_SEPARATOR . $hash;
if (!file_exists($file)) {
$data = file_get_contents($url);
file_put_contents($file, $data);
}
header('Content-Type: image/jpeg');
readfile($file);
Ok, I've got a streaming example for you. You need to adapt it to your needs, of course.
Suppose you make a php file on your server named mws.php with this content:
if (isset($_GET['image']))
{
header('Content-type: image/jpeg');
header('Content-transfer-encoding: binary');
echo file_get_contents($_GET['image']);
}
Look for any image on the web, for instance:
http://freebigpictures.com/wp-content/uploads/2009/09/mountain-stream.jpg
now you can show that image, as if it was located on your own secure server with this url:
https://<your server>/mws.php?image=http://freebigpictures.com/wp-content/uploads/2009/09/mountain-stream.jpg
It would of course be better to store the image locally if you need it more than once, and you have to include the correct code to get it from Amazon MWS ListMatchingProducts, but this is the basic idea.
Please don't forget to secure your script against abuse.
Lets say I have this weblink: http://checkip.amazonaws.com/ . I've made a java program (actual program. not webpage) that reads the content of this webpage (eg. "25.25.25.25") and displays it in a jLabel (Using Netbeans IDE 1.7.3) and it works.
Now how can I read the contents of this same webpage (eg. "25.25.25.25") and display it as normal text on a webpage (The final webpage must be .html not .php or what ever)?
I dont mind any script whether is html or javascript or anything, I just please need it to work so that when the webpage is opened it can read something like:
"Your IP: 25.25.25.25"
Preferably reading the contents of http://checkip.amazonaws.com/ into
<script>var ip = needCodeHere</script>
If I can get the IP into a var or read the contents of that webpage into a var I'm happy but other code is happy to as long as it works.
Please help :( been staring at google for days and cant find a solution)
You'll need 3 files (in the same directory) to do that. A HTML file to show the ip, a PHP file to get that ip via curl, and a JS file to connect the html and the php. It would be simpler if the "final webpage" could be the ip.php itself, but let's do it this way:
1) ip.html (the "final webpage")
<script src="//code.jquery.com/jquery-1.11.0.min.js"></script>
<script type="text/javascript" src="ip.js"></script>
<div id="ip"></div>
2) ip.php
<?php
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, 'http://checkip.amazonaws.com');
$result = curl_exec($curl);
curl_close($curl);
?>
3) ip.js
$.ajax({
url: 'ip.php',
type: "GET",
success: function (data) {
$('#ip').html("Your IP: " + data);
}
});
Let me know if you need more explanation.