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POCan't get JSON results from file in XMLHttpRequest
 

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  1. POCan't get JSON results from file in XMLHttpRequest
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    <p>I'm having problems getting my request filled with the data from a json file... Data is pulled from Mysql DB and formatted in a JSON file in the scripts dir... </p> <p>Could there be a problem with the GET request ? I just want the json file returned so i could work with the key/val pairs inside of it ... </p> <p>Any suggestions would be appreciated.</p> <pre><code>function fetchData($str){ $queryAll = "select name,value,date from chart where id &lt;= (select max(id) from chart) limit 50"; $dateValue = mysql_query($queryAll); $pushed = array(); while($row = mysql_fetch_array($dateValue,MYSQL_ASSOC)){ $key = array_shift($row); $value = array_shift($row); $date = array_shift($row); if(strcmp("$str",$key) == 0){ $myArray = array($key, $value, $date); array_push($pushed,$myArray); } } $jsonFile = json_encode($pushed); $jsonOpenFile = fopen("../scripts/$str.json","w+") or exit("Unable to open file!"); $jsonWriteOut = fwrite($jsonOpenFile,$jsonFile); } fetchData("blabla"); ?&gt; </code></pre> <pre><code>&lt;script&gt; function Graph(JsonVal){ var xmlhttp = new ajaxRequest(); if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 &amp;&amp; xmlhttp.status==200) { var jsondata=eval("("+xmlhttp.responseText+")"); var returned = jsondata.items var output; for(var i=0; i&lt;returned.length;i++){ output += "&lt;p&gt;"; output += returned[i]; output += "&lt;/p&gt;"; } document.getElementById("MyGraph").innerHTML=output } } xmlhttp.open("GET","../scripts/"+JsonVal+".json",true); xmlhttp.send(null); } &lt;/script&gt; &lt;div id="MyGraph" onload="Graph();"&gt;&lt;/div&gt; </code></pre>
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    1. PTQuestion
    1. USPasserby
    1. US4M8B
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    1. COWhat exactly *is* the problem? What happens and what do you expect to happen? It's a lot easier for us to help you when we know what is wrong.
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      1. USFelix Kling
    2. COLots less typing (and much easier format, IMO) with jQuery/AJAX... Just saying... Tons of examples on here to search.
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      1. POCan't get JSON results from file in XMLHttpRequest
      1. USgibberish
    3. CO`eval` can be very dangerous. If you're expecting JSON data you can use `JSON.parse` if your browser supports it, or a library like [JSON2](https://github.com/douglascrockford/JSON-js), or [jQuery](http://jquery.com). jQuery will simplify your AJAX calls too.
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