azhao1981

# https://solidfoundationwebdev.com/blog/posts/how-to-create-a-dynamic-robots-txt-in-rails?utm_source=rubyweekly&utm_medium=email

# config/routes.rb

```
get '/robots.:format' => 'pages#robots'
```
```
# app/controllers/pages_controller.rb
class PagesController < ApplicationController

azhao1981

1. ejabberd 启动，服务端 gen_fsm 处于 wait_for_stream 状态

2. 客户端发送

<!-- TS:2014-09-15T10:56:24-->
<?xml version="1.0"?>
<!-- TS:2014-09-15T10:56:24-->
<stream:stream xmlns:stream="http://etherx.jabber.org/streams" 
	version="1.0" xmlns="jabber:client" to="localhost" 
	xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace">

azhao1981

Adding an audit log to your Rails app

If you have any sort of administrative interface on your web site, you can easily imagine an intruder gaining access and mucking about. How do you know the extent of the damage? Adding an audit log to your app is one quick solution. An audit log should record a few things:

• controller entry points with parameter values
• permanent information about the user, like user_id
• transient information about the user, like IP and user_agent

Using the Rails framework, this is as simple as adding a before_action to your admin controllers. Here’s a basic version that I’m using in production.

azhao1981

Benchmarking Nginx with Go

There are a lot of ways to serve a Go HTTP application. The best choices depend on each use case. Currently nginx looks to be the standard web server for every new project even though there are other great web servers as well. However, how much is the overhead of serving a Go application behind an nginx server? Do we need some nginx features (vhosts, load balancing, cache, etc) or can you serve directly from Go? If you need nginx, what is the fastest connection mechanism? This are the kind of questions I'm intended to answer here. The purpose of this benchmark is not to tell that Go is faster or slower than nginx. That would be stupid.

So, these are the different settings we are going to compare:

• Go HTTP standalone (as the control group)
• Nginx proxy to Go HTTP
• Nginx fastcgi to Go TCP FastCGI
• Nginx fastcgi to Go Unix Socket FastCGI

azhao1981

Libraries

• 960 Grid System - An effort to streamline web development workflow by providing commonly used dimensions, based on a width of 960 pixels. There are two variants: 12 and 16 columns, which can be used separately or in tandem.
• Compass - Open source CSS Authoring Framework.
• Bootstrap - Sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development.
• Font Awesome - The iconic font designed for Bootstrap.
• Zurb Foundation - Framework for writing responsive web sites.
• SASS - CSS extension language which allows variables, mixins and rules nesting.
• Skeleton - Boilerplate for responsive, mobile-friendly development.

Guides

azhao1981

Packages

• lxml - Pythonic binding for the C libraries libxml2 and libxslt.
• boto - Python interface to Amazon Web Services
• Django - Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design.
• Fabric - Library and command-line tool for streamlining the use of SSH for application deployment or systems administration task.
• PyMongo - Tools for working with MongoDB, and is the recommended way to work with MongoDB from Python.
• Celery - Task queue to distribute work across threads or machines.
• pytz - pytz brings the Olson tz database into Python. This library allows accurate and cross platform timezone calculations using Python 2.4 or higher.

Guides

azhao1981

Libraries

• jQuery - The de-facto library for the modern age. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a multitude of browsers.
• Backbone - Backbone.js gives structure to web applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing API over a RESTful JSON interface.
• AngularJS - Conventions based MVC framework for HTML5 apps.
• Underscore - Underscore is a utility-belt library for JavaScript that provides a lot of the functional programming support that you would expect in Prototype.js (or Ruby), but without extending any of the built-in JavaScript objects.
• lawnchair - Key/value store adapter for indexdb, localStorage

azhao1981

Gems

• Bundler - Bundler maintains a consistent environment for ruby applications. It tracks an application's code and the rubygems it needs to run, so that an application will always have the exact gems (and versions) that it needs to run.
• rabl - General ruby templating with json, bson, xml, plist and msgpack support
• Thin - Very fast and lightweight Ruby web server
• Unicorn - Unicorn is an HTTP server for Rack applications designed to only serve fast clients on low-latency, high-bandwidth connections and take advantage of features in Unix/Unix-like kernels.
• SimpleCov - SimpleCov is a code coverage analysis tool for Ruby 1.9.
• Zeus - Zeus preloads your Rails app so that your normal development tasks such as console, server, generate, and specs/tests take less than one second.
• [factory_girl](h

azhao1981

// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

azhao1981

Why!!!!!!!!!!