Devin Zhang simlegate

Render and Redirect

The normal controller/view flow is to display a view template corresponding to the current controller action, but sometimes we want to change that. We use render in a controller when we want to respond within the current request, and redirect_to when we want to spawn a new request.

Render

The render method is very overloaded in Rails. Most developers encounter it within the view template, using render :partial => 'form' or render @post.comments, but here we'll focus on usage within the controller.

`:action`

  // composer.phar是二进制文件
  // 它是一个PHAR (PHP archive)，PHP的归档格式，也可以像其他命令一样在命令行上运行。
  
  $ curl -sS https://getcomposer.org/installer | php
  $ sudo mv composer.phar /usr/local/bin/composer

	# 查看网络端口占用情况
	netstat -an \| grep 9000

	# 通过list open file命令可以查看到当前打开文件，在linux中所有事物都是以文件形式存在，包括网络连接及硬件设备。
	lsof -i:9000

	# 查看php.ini文件的位置

	php --ini

	<?php

	/*
	*---------------------------------------------------------------
	* APPLICATION ENVIRONMENT
	*---------------------------------------------------------------
	*
	* You can load different configurations depending on your
	* current environment. Setting the environment also influences
	* things like logging and error reporting.

	class A{
	public B b;

	}
	class B{
	public A a;
	}
	public class Main{
	public static void main(String[] args){
	A a = new A();

	error_page 400 404 405 =200 @40*_json;

	location @40*_json {
	default_type application/json;
	return 200 '{"code":"1", "message": "Not Found"}';
	}

	error_page 500 502 503 504 =200 @50*_json;

	location @50*_json {

	zh-CN:
	admin:
	home:
	name: "首页"
	pagination:
	previous: "« 上一页"
	next: "下一页 »"
	truncate: "…"
	misc:
	filter_date_format: "mm/dd/yy" # a combination of 'dd', 'mm' and 'yy' with any delimiter. No other interpolation will be done!

	require 'digest/sha1'
	require 'base64'

	# client request
	# GET / HTTP/1.1
	# Upgrade: websocket
	# Connection: Upgrade
	# Host: example.com
	# Origin: null
	# Sec-WebSocket-Key: sN9cRrP/n9NdMgdcy2VJFQ==