kvdb.net

Serve plain JSON correctly using PHP

June 30, 2009, 1 Comment

When prototyping, it’s handy to use a plain text file that contains JSON instead of generating it in code.

But consuming JSON data from JavaScript works better when it’s served with the correct application/json mimetype.

Using the PHP wrapper below, that plain text file is being served correctly.
By providing the optional jsonp parameter, the JSON can also returned as JSONP.
The script may also be used as a proxy to get JSON data from another domain to prevent crossdomain scripting errors.

<?php
    $url = $_REQUEST['url'];
    if ($url) {  
      $data = file_get_contents($url);
    } else {
      echo "Please provide the 'url' parameter.";
      return;
    }
 
    $jsonp = $_REQUEST['jsonp'];
    if ($jsonp) {
      $data = $jsonp . "(" . $data . ");";
    }
 
    header('Content-type: application/json');
    echo $data;
?>

Usage examples:
(more…)

SSH directly into remote virtual machines

June 16, 2009, No Comments

Host 6pp_vm is a virtual machine that runs on host kvdb.net. The usual steps for connecting to 6pp_vm from my laptop:

kvdb@laptop:$ ssh kvdb.net
# Type password
kvdb@kvdb:$ ssh 6pp_vm
# Type password
kvdb@6pp:$

The goal is a login process reduced to:

kvdb@laptop:$ ssh 6pp_vm
kvdb@6pp:$

(more…)

Hello world!

June 16, 2009, 1 Comment

On this blog, I’ll post technical notes so I won’t forget them. You might find them useful.

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