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POPrevent ajax progress code from aborting prematurely
 

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  1. POPrevent ajax progress code from aborting prematurely
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    <p>I am using index.php</p> <pre><code>&lt;script type="text/javascript"&gt; $(function(){ $("#progressbar").progressbar({ value: 0 }); function load() { $.ajax({ url: './ajax.php?status='+$( "#progressbar" ).progressbar( "value" ), success: function(data) { ajax = eval('(' + data + ')'); if(ajax!=false) { $("#progressbar").progressbar({ value: ajax.status }); $("#message").html( ajax.message ); if(ajax.status!=100) { load(); } } } }); } load(); }); &lt;/script&gt; &lt;div id="message"&gt;&lt;/div&gt; </code></pre> <p>for a live ajax-based progress information. This works with ajax.php:</p> <pre><code>&lt;?php $php_array['status'] = rand(0,99); if($php_array['status']&gt;100) { $php_array['status'] = 100; } if($php_array['status'] != 100) { $php_array['message'] = 'Aktueller Status &lt;b&gt;'.$php_array['status'].'%&lt;/b&gt; von 100%, Differenz: '.(100-$php_array['status']); } else { $php_array['message'] = 'Juhu endlich geschafft!'; } // Ausgabe des PHP Arrays als JSON Objekt echo json_encode($php_array); ?&gt; </code></pre> <p>which shows a random number between 0 and 99 in index.php, so it works.</p> <p>I modified ajax.php to</p> <pre><code>&lt;?php //modified - start $zahl = 0; $menge = 0; if ($handle = opendir('folder')) { while (false !== ($entry = readdir($handle))) { if (strpos($entry,$_GET['session_id']) !== false) { if (strpos($entry,'result') !== false) { } else { $zahl += (int)file_get_contents('folder/'.$entry); $menge++; } } } closedir($handle); } if((int)($zahl/$menge) != 0.0) { $php_array['status'] = (int)($zahl/$menge); } else { $php_array['status'] = 0; } //modified - end if($php_array['status']&gt;100) { $php_array['status'] = 100; } if($php_array['status'] != 100) { $php_array['message'] = 'Aktueller Status &lt;b&gt;'.$php_array['status'].'%&lt;/b&gt; von 100%, Differenz: '.(100-$php_array['status']); } else { $php_array['message'] = 'Juhu endlich geschafft! &lt;img src="http://d4nza.de/blog/wp-includes/images/smilies/icon_wink.gif" alt=";)" class="wp-smiley"&gt; '; } echo json_encode($php_array); ?&gt; </code></pre> <p>The opendir-part iterates through all output-text-files, which contain only a number between 0 and 100. Goal is to find the average progress. Then in</p> <pre><code>(int)($zahl/$menge) </code></pre> <p>it is being converted to an integer and forwarded via json to the index.php.</p> <p>This works sometimes. That means, on index.php sometimes I see the progress, sometimes I don't. </p> <p>How can I make the code in the index.php make it wait for the ajax.php to respond and not (presumably) abort prematurely?</p>
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    1. USPeter Weter
    1. USPeter Weter
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    1. COplease use `$.getJSON`. `eval()` is just asking for problems.
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      1. POPrevent ajax progress code from aborting prematurely
      1. USVen
    2. COI read "Not all browsers have native JSON support so there will be times where you need to use eval() to the JSON string" at http://stackoverflow.com/questions/1843343/json-parse-vs-eval
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      1. POPrevent ajax progress code from aborting prematurely
      1. USPeter Weter
    3. COUse JSON2 or JSON3 then. Much faster than eval.
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      1. USVen
 

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