Its been a long time since my last post (over 8 months) so I have decided to start using this blog again ... mainly for me to keep records of the little tricks / tips I have learnt or read during my working day.
Im currently working on a project to rewrite a billing system - Im using symfony (PHP Framwork) with JQuery and MySQL.....
I will hopefully post some updates in a few days time ... I have learnt a lot about symfony, JQuery and MySQL over the past few months :-)
Thursday 29 September 2011
Friday 14 January 2011
JavaScript Sandbox
Just found an excellent site - allows you to enter HTMl, CSS and JavaScript and then show the result - very useful http://jsfiddle.net/ you can even save the page and share as a link
Thursday 13 January 2011
Cross Domain AJAX
The other day I was looking for a simple way of accessing a foreign domain using AJAX - I needed to POST some data to a 3rd Party webservice. JavaScript opens up a few different ways of solving this problem, but most of them require some addition (a file normally) to be placed on the foreign domain web server - this option was not open to me. So I decided to create a simple proxy in PHP - the idea is that I would use JavaScript to POST using AJAX to the PHP script, and then the PHP script would connect to the 3rd party, POST the data and then return the value back to the JavaScript callback. Below is the code I used.
Firstly the PHP proxy script
The JavaScript is equally as simple (below I am using YUI Connection Manager)
Firstly the PHP proxy script
//open curl connection $cc = curl_init(); // get url from $_GET $url = $_GET['url']; // set the curl url curl_setopt($cc, CURLOPT_URL, $url); // set return option curl_setopt($cc, CURLOPT_RETURNTRANSFER, true); // set method to POST curl_setopt($cc, CURLOPT_POST, 1); // loop the $_POST entries and save foreach ($_POST as $name => $value){ $data[$name] = $value; } // set the post data curl_setopt($cc, CURLOPT_POSTFIELDS, $data); //execute curl post $result = curl_exec($cc); //close connection curl_close($cc); echo $result;Very simple script - basic cURL setup between lines 01 and 10. The loop at line 13 goes through the POST values sent to the proxy and stores them in a variable for use later in the script. Line 18 sets up the POST data and line 21 sends the request. The cURL connection is then closed and the result is sent back the caller (JavaScript) on line 26.
The JavaScript is equally as simple (below I am using YUI Connection Manager)
// Example POST data var postData = "name1=value1&name2=value2&name3=value3; // Handle Success var handleSuccess = function(o){ // Handle a success - output to console console.log(o.responseText); } // Handle Failure var handleFailure = function(o){ //handle failure calling URL console.log(o.statusText); } // Setup callback var callback = { success:handleSuccess, failure:handleFailure }; // setup the url of the proxy script // passing the foreign url in as a parameter var callurl = "/proxy.php&url=http://www.google.co.uk/"; // make the AJAX request YAHOO.util.Connect.asyncRequest('POST', callurl, callback, postData);As you can see - very simple - setup the POST data on line 02, setting up the handlers between lines 05 and 19. The final 2 lines (23 and 25) setup the URL to the proxy we created above and the actual AJAX call to the script.
Tuesday 11 January 2011
Welcome to devtreats
Welcome to devtreats - a resource for some Web Development Treats. The aim of this blog is to share some of the little treats that I have come across or developed over the years - you may read things that have been done a thousand times or something that you have never thought about. But the idea is to share and record the little re-usable treats.
If you have any ideas or requests for articles then please add some comments to this post or follow me on twitter @manseuk
Thanks
Paul
If you have any ideas or requests for articles then please add some comments to this post or follow me on twitter @manseuk
Thanks
Paul
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