cd /tmp wget http://redis.googlecode.com/files/redis-2.2.12.tar.gz tar -zxf redis-2.2.12.tar.gz cd redis-2.2.12 make sudo make install
It will install in global:
mkdir -p /usr/local/bin cp -p redis-server /usr/local/bin cp -p redis-benchmark /usr/local/bin cp -p redis-cli /usr/local/bin cp -p redis-check-dump /usr/local/bin cp -p redis-check-aof /usr/local/bin
Environment: debian/ubuntu
This script can monitor cpu/memory usage of your node application, and start/stop it via a web interface or command line
sudo apt-get install upstart monit
then edit /etc/defaults/monit, set startup=1
#!upstart description "your_app" author "Hongbo LU" start on (local-filesystems and net-device-up IFACE=eth0) stop on runlevel 0 respawn # restart when job dies respawn limit 5 60 # give up restart after 5 respawns in 60 seconds script exec start-stop-daemon --start --make-pidfile --pidfile /var/run/your_app.pid --chdir /path/to/your/app --chuid user:usergroup --exec NODE_ENV=production /usr/local/bin/node index.js >> /var/log/nodejs/node.log 2>&1 end script
NOTICE:
include /etc/monit/conf.d/* set daemon 120 # Poll at 2-minute intervals set logfile syslog facility log_daemon set alert youremail@email.com set httpd port 2812 and use address localhost allow localhost # Allow localhost to connect allow admin:Monit # Allow Basic Auth
check process plusnode
with pidfile "/var/run/your_app.pid"
start program = "/sbin/start your_app"
stop program = "/sbin/stop your_app"
if 2 restarts within 3 cycles then timeout
if totalmem > 100 Mb then alert
if children > 255 for 5 cycles then stop
if cpu usage > 95% for 3 cycles then restart
if failed port 80 protocol http
request /valid_url/
with timeout 5 seconds
and if failed port 443 type tcpssl protocol http
request /valid_url/
with timeout 5 seconds
then restart
NOTICE:
#upstart command sudo start your_app sudo status your_app sudo stop your_app #the commands above are shortcuts of initctl: initctl start your_app initctl status your_app #to check if the upstart conf is valid initctl check-config #to reload upstart configs initctl reload-configuration #monit command sudo monit sudo monit start your_app
NOTICE:
PHP header codes, for reference only:
// Use this header instruction to fix 404 headers
// produced by url rewriting...
header('HTTP/1.1 200 OK');
// Page was not found:
header('HTTP/1.1 404 Not Found');
// Access forbidden:
header('HTTP/1.1 403 Forbidden');
// The page moved permanently should be used for
// all redrictions, because search engines know
// what's going on and can easily update their urls.
header('HTTP/1.1 301 Moved Permanently');
// Server error
header('HTTP/1.1 500 Internal Server Error');
// Redirect to a new location:
header('Location: http://www.example.org/');
// Redriect with a delay:
header('Refresh: 10; url=http://www.example.org/');
print 'You will be redirected in 10 seconds';
// you can also use the HTML syntax:
// <meta http-equiv="refresh" content="10;http://www.example.org/ />
// override X-Powered-By value
header('X-Powered-By: PHP/4.4.0');
header('X-Powered-By: Brain/0.6b');
// content language (en = English)
header('Content-language: en');
// last modified (good for caching)
$time = time() - 60; // or filemtime($fn), etc
header('Last-Modified: '.gmdate('D, d M Y H:i:s', $time).' GMT');
// header for telling the browser that the content
// did not get changed
header('HTTP/1.1 304 Not Modified');
// set content length (good for caching):
header('Content-Length: 1234');
// Headers for an download:
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="example.zip"');
header('Content-Transfer-Encoding: binary');
// load the file to send:
readfile('example.zip');
// Disable caching of the current document:
header('Cache-Control: no-cache, no-store, max-age=0, must-revalidate');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header('Pragma: no-cache');
// set content type:
header('Content-Type: text/html; charset=iso-8859-1');
header('Content-Type: text/html; charset=utf-8');
header('Content-Type: text/plain'); // plain text file
header('Content-Type: image/jpeg'); // JPG picture
header('Content-Type: application/zip'); // ZIP file
header('Content-Type: application/pdf'); // PDF file
header('Content-Type: audio/mpeg'); // Audio MPEG (MP3,...) file
header('Content-Type: application/x-shockwave-flash'); // Flash animation
// show sign in box
header('HTTP/1.1 401 Unauthorized');
header('WWW-Authenticate: Basic realm="Top Secret"');
print 'Text that will be displayed if the user hits cancel or ';
print 'enters wrong login data';
I just created a dojo based YUIDOC theme, it’s similar to Dojotoolkit Api.
demo can be found here: YUI Api Doc
Feature:
It has some performance issue in Firefox < 4 for huge project (like YUI), and IE <9 is not supported (well, not tested )
your feedback is much appreciated
source code can be found here: theme-darktalker
variable scope in PHP is painful. not like java or javascript, you can’t get preg_replace_callback works like this:
class test{
private $a = 'test';
public function foo($data){
$a = $this->a;
function nested($matches){
return $matches[1].$a;
}
preg_replace_callback('/href=(.*?)/i','nested',$data);
}
}
what you have to do is like this:
class test{
private $a = 'test';
public function foo($data){
$a = $this->a;
$nested = function nested($matches){
return $matches[1].$a;
}
preg_replace_callback('/href=(.*?)/i',array(get_class($this), 'bar'),$data);
}
private function bar($matches){
return $matches[1].$this->a;
}
}
How to manually trigger a DOM event:
/**
* trigger a DOM event via script
* @param {Object,String} element a DOM node/node id
* @param {String} event a given event to be fired - click,dblclick,mousedown,etc.
*/
var fireEvent = function(element, event) {
var evt;
var isString = function(it) {
return typeof it == "string" || it instanceof String;
}
element = (isString(element)) ? document.getElementById(element) : element;
if (document.createEventObject) {
// dispatch for IE
evt = document.createEventObject();
return element.fireEvent('on' + event, evt)
}
else {
// dispatch for firefox + others
evt = document.createEvent("HTMLEvents");
evt.initEvent(event, true, true); // event type,bubbling,cancelable
return !element.dispatchEvent(evt);
}
}
usage:
fireEvent("node_id","click");
Sometimes we have problem of reindexing via magento’s admin such as latency, we prefer doing it directly via script.
Continue reading “How to reindex “Catalog Search Index” via script” »
This post will describe a simple technique to secure your virtual host with basic HTTP password protection provided by Apache. This can be useful if you want to keep users away from the webstore during development
