Ian Chen ianchen06

Routes

小心地使用 Match（Rails 3 已实现）

Rails 3 提供了 match 方法供我们自定义 routes，然而我们要小心使用它以避免“跨站脚本攻击”（XSS Attack）。比如像这样的 routes：

注：（r3 代表 Rails 3，r4 代表 Rails 4）

# routes.rb

The avconv utility can be made to work in 'the Unix way' by specifying stdin and/or stdout instead of filenames for the input and output respectively. See: http://libav.org/avconv.html#pipe

Example:

cat input.ts | avconv -i pipe:0 -f mp4 -movflags frag_keyframe pipe:1 | cat > output.mp4

Using node's require('child_process').spawn(), we can pipe streams of video data through avconv's stdin and stdout and thus Stream All The Things.

var fs = require('fs');

This document has now been incorporated into the uWSGI documentation:

http://uwsgi-docs.readthedocs.org/en/latest/tutorials/Django_and_nginx.html

Set up Django, nginx and uwsgi

Steps with explanations to set up a server using:

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

Here's a few things I tried to write output to a python subprocess pipe.

from subprocess import Popen, PIPE

p = Popen('less', stdin=PIPE)
for x in xrange(100):
    p.communicate('Line number %d.\n' % x)

	# ~/.config/fish/config.fish

	. ~/.config/fish/fish_prompt.fish

	set fish_greeting '' # turn off greeting

	function fish_title;end

	alias vi 'vim'

	import contextlib
	import subprocess

	# Unix, Windows and old Macintosh end-of-line
	newlines = ['\n', '\r\n', '\r']
	def unbuffered(proc, stream='stdout'):
	stream = getattr(proc, stream)
	with contextlib.closing(stream):
	while True:
	out = []

	/**
	* Use `Array#some` when it is convenient to exit on truthy return values
	* Use `lodash.forEach` when it is convenient to exit on false (you can cast if necessary with `!!`)
	*/

	var _ = require('lodash');
	var numbers = [1, 2, 3, 4, 5, 6];

	console.log('Array#forEach (result not as expected)');

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
	def facebook
	@user = User.find_for_facebook_oauth(request.env["omniauth.auth"], current_user)

	if @user.persisted?
	flash[:notice] = I18n.t "devise.omniauth_callbacks.success", :kind => "Facebook"
	sign_in_and_redirect @user, :event => :authentication
	else
	session["devise.facebook_data"] = request.env["omniauth.auth"]
	redirect_to new_user_registration_url