lemonhall

last edit: 20140822 15:11

本文分析的代码是 nanomsg-0.4-beta版本。
要创建一个 PUB/SUB 服务，只需要六个 API，分别是：
1. nn_socket
2. nn_bind
3. nn_connect
4. nn_send
5. nn_recv
6. nn_close

lemonhall

Backend Architectures

Twitter

ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats

• Scaling Twitter: Making Twitter 10000 Percent Faster
• Scaling Twitter
• Blaine Cook on Scaling Twitter - YouTube

lemonhall

These instructions work for the Raspberry Pi running Raspbian (hard float) and create a hardware optimized version of NodeJS for the Raspberry PI, (and include a working install and NPM!!!):

1. Install Raspbian - http://www.raspberrypi.org/downloads

2. Install the necessary dependecies:

sudo apt-get install git-core build-essential

(If you just installed git then you need to administer your git identity first, else adding the patches below will fail!!!)

lemonhall

/*
 * FormData for XMLHttpRequest 2  -  Polyfill for Web Worker  (c) 2012 Rob W
 * License: Creative Commons BY - http://creativecommons.org/licenses/by/3.0/
 * - append(name, value[, filename])
 * - toString: Returns an ArrayBuffer object
 * 
 * Specification: http://www.w3.org/TR/XMLHttpRequest/#formdata
 *                http://www.w3.org/TR/XMLHttpRequest/#the-send-method
 * The .append() implementation also accepts Uint8Array and ArrayBuffer objects
 * Web Workers do not natively support FormData:

lemonhall

// Getting a file through XMLHttpRequest as an arraybuffer and creating a Blob
var rhinoStorage = localStorage.getItem("rhino"),
    rhino = document.getElementById("rhino");
if (rhinoStorage) {
    // Reuse existing Data URL from localStorage
    rhino.setAttribute("src", rhinoStorage);
}
else {
    // Create XHR, BlobBuilder and FileReader objects
    var xhr = new XMLHttpRequest(),

lemonhall

var http = require('http');
var url='http://r.autobloglink.com/?u=aHR0cDovL3BpYy5oYW5pbWFnZS5jb20vZGFiYWdpcmwvRFJFU1MvRGExMDcwNC8yLmpwZw==';

http.get(url, function(res) {
  console.log("Got response: " + res.statusCode);
  if(res.statusCode===302){
  	console.log(res.headers.location);
  }
}).on('error', function(e) {
	console.log("Got error: " + e.message);

lemonhall

function encodeToGb2312(str){
    var strOut="";
    for(var i = 0; i < str.length; i++){
        var c = str.charAt(i); 
        var code = str.charCodeAt(i);
        if(c==" ") strOut +="+";
        else if(code >= 19968 && code <= 40869){
            index = code - 19968;
            strOut += "%" + z.substr(index*4,2) + "%" + z.substr(index*4+2,2);
        }