[eluser]markanderson993[/eluser]
I am creating an image system where a user uploads an image and can view it again for instance as a profile picture. What I've written so far is a coded procedure that follow these steps.
1. User Upload (image is selected of user's computer) submit button activates a handle script
2. The image is encoded and resized 4 times according to various needs and stored in a special folder uniquely generated when the user successfully signed up. Also a unique reference name is assigned to each image and stored in a database.
( At this point there are 4 images in a folder called something like 9812uy98313981238923 and located in an upload folder in the root directory)
3. Now when a user wants to see a picture (lets say a profile picture) I print out an image tag <img> and for the source I send it off to what I call the serving function. Here it is:
Code:
<?php
class Serve extends Controller {
function Serve()
{
parent::Controller();
}
function index()
{
redirect('');
}
function image()
{
$ref_name = $this->uri->segment(3);
if (!isset($ref_name)) redirect('');
#Get Location Information (Reference Name, Upload Folder)
$this->db->where('ref_name',$ref_name);
$get_image_dir_row = $this->db->get('image_dir');
if ($get_image_dir_row->num_rows() == 1)
{
$image_dir_row = $get_image_dir_row->row();
$upload_folder = $image_dir_row->upload_folder;
# Get Image Info (Raw name, Extension, File Type)
$this->db->where('image_id',$image_dir_row->image_id);
$get_image_info_row = $this->db->get('image_info');
$image_info_row = $get_image_info_row->row();
$raw_name = $image_info_row->raw_name;
$ext = $image_info_row->file_ext;
$file_type = $image_info_row->file_type;
// Do access checks here...
// If access is allowed, figure out where the real image is from the image id...
$actual_path_to_image = '../uploads/'.$upload_folder.'/'.$raw_name . $ext;
// Output the image...
header('Content-Type: '.$file_type);
echo(file_get_contents($actual_path_to_image));
$this->output->cache(1);
} else {
redirect('');
}
}
}
?>
(so what this is doing is using a reference name to retrieve the actual file name in the user's upload folder)
How can I make it that this controller is still activated when a user wants to see their image but cache the images retrieved so that if the image is viewed more than once it is already loaded and ready to go?
I appreciate any help, thank you!
- Mark
