url mapping in code igniter

Question

I'm writing a PHP application using codeigniter framework. I'm trying to add a tool to download the data in the page as a .csv format file. I have the code to the server side, but I'm having trouble handling the URL mapping for the "Download" Controller. in /controllers/ I have a controller called "Download", which is has a function called 'exportCSV', which receives a json object that is decoded and used to create the file. So, I'm trying to send a JavaScript array through 'post' to that method, but I'm having trouble handling the URL mapping. here is my javascript call ...

function download(){

$.post('index.php/download/exportCSV', {input : dataForDownload.toString()},

              function(answer){
                  alert(answer);
            }
       );
}

Answer 1

POST to index.php/download/exportcsv . CI doesn't much like Mixed Case controllers.

If you have a download controller, it should look like this:

class Download extends CI_Controller { function _ construct() { parent:: _construct(); }

function exportcsv()
{
    if($this->input->post())
    {
        // Something was POSTed, continue

        // process input

    } else {
        // Catch error if no POST
    }
}

}

If you're getting a 404, your application might not be set up correctly. Check routes.php and your base_url .

I also recommend the CodeIgniter user guide. It's full of good information:

• http://codeigniter.com/user_guide/overview/appflow.html
• http://codeigniter.com/user_guide/overview/mvc.html