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Question

Ajax requires user to submit information multiple times before it is recived and logged

Answer 1

A:

A good measure everyone should adopt is that of security, never explicitly trust your users to be nice and input precisely what you expect them. Always, always check POST and GET variables are safe before using them. Functions such as "strip_tags", "mysql_real_escape" (if you go and place these into a database), should be explored.

Jim Grant 2010-09-06 20:05:40

Answer 2

A:

I just grabbed your code and tested it out in my computer. Did some small changes but everything if working fine. I just commented

xmlhttp.execCommand('mceRemoveControl',false,'content');

then everything worked fine on FireFox.

Below you can see the code that I ran:

HTML:

<html>
<head>
<!--link href="CSS.css" rel="stylesheet" type="text/css"-->
<script type="text/javascript">
function sendmessage()
{
if (window.XMLHttpRequest)
  {
  xmlhttp=new XMLHttpRequest();
  }
else
  {
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }


var name=encodeURIComponent(document.getElementById("name").value);
var message=encodeURIComponent(document.getElementById("message").value);
xmlhttp.open("POST","insert.php",true);
xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
//xmlhttp.execCommand('mceRemoveControl',false,'content');
xmlhttp.send("name="+name+"&message="+message);
}
</script>
</head>
<body>
  <center>
    <table width="600">
      <tr>
        <td height="400">
          <center>
            <iframe src ="output.php" width="580px" height="386px">
              <p>Your browser does not support iframes.</p>
      </iframe>
          </center>
        </td>
      </tr>
      <tr>
        <td>
          <form method="POST"></br>
          &nbsp Name: &nbsp &nbsp &nbsp 
    <input type="text" id="name" autocomplete="off" size="15"/><br/><br/>
    &nbsp Message: &nbsp
    <input type="text" id="message" autocomplete="off"  size="70"/> &nbsp
    <input type="submit" value="Send" onclick="sendmessage()"/>
          </form>
        </td>
      </tr>
    </table>
  </center>
</body>
</html>

PHP:

<?php
try{
    $name='<table><tr><td width="100%">'.$_POST['name']." Says:</td>";
$message="<table><tr><td>".$_POST['message']."</td></tr></table></br>\n"; 
$time="<td>".date("d/m/y-G:i")."</td></tr></table>";
$file = "output.php";
$write = fopen($file, 'a') or die("Can't open file");
fwrite($write, $name);
fwrite($write, $time);
fwrite($write, $message);
fclose($write);
}catch(Exception $err){
    echo $err; 
}
?>

I just tried in FireFox 3.6 Safari 5 and Chrome 6. I'm using a Mac so I didn't tried in IE. In those 3 browsers everything worked fine after the line that I told you at the beginning. Could you proved more details about your problem?

João Gala Louros 2010-09-06 20:31:58

I knew about that segment of code. It was a previous attempt at fixing the problem I was suffering, but I forgot to remove it when posting this question. The form requires the user to submit the data fields multiple times before it appears to be recognised by the PHP code that should add it to a log file. It doesn't seem to suffer this problem if I don't enter any information into the forms. Sorry about this as it is my first time using the site.

2010-09-06 20:55:29

Answer 3

A:

Okay, I've managed to fix the problem. It was as simple as changing the ajax asynchronism to false. Hopefully this should not create any other issued. Thanks guys!

2010-09-06 21:07:44

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Ajax requires user to submit information multiple times before it is recived and logged

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