Monthly Archives: May 2013

SIEGE

Siege is an http load testing and benchmarking utility. It was designed to let web developers measure their code under duress, to see how it will stand up to load on the internet. Siege supports basic authentication, cookies, HTTP and HTTPS protocols. It lets its user hit a web server with a configurable number of simulated web browsers. Those browsers place the server “under siege.”

下载最新版

wget http://www.joedog.org/pub/siege/siege-latest.tar.gz

tar -zxf siege-lastest.tar.gz

cd siege-xxx

./configure && make && install

vi /tmp/tmpurl
http://127.0.0.1/index.html
http://127.0.0.1/images/banner/1.jpg
http://127.0.0.1/images/banner/8.jpg

siege -c 100 -b -i -r 100 -f /tmp/tmpurl

100个用户,执行100次。

** SIEGE 3.0.0
** Preparing 100 concurrent users for battle.
The server is now under siege.. done.

Transactions: 10000 hits
Availability: 100.00 %
Elapsed time: 2.44 secs
Data transferred: 1396.79 MB
Response time: 0.02 secs
Transaction rate: 4098.36 trans/sec
Throughput: 572.45 MB/sec
Concurrency: 91.24
Successful transactions: 10000
Failed transactions: 0
Longest transaction: 0.23
Shortest transaction: 0.00

静态文件用nginx直接serve

#css|js|ico|gif|jpg|jpeg|png|txt|html|htm|xml|swf|wav这些都是静态文件,但应分辨,js、css可能经常会变,过期时间应小一些,图片、html基本不变,过期时间可以设长一些
location ~* ^.+\.(ico|gif|jpg|jpeg|png|html|htm)$ {
root /var/www/poseidon/root/static;
access_log off;
expires 30d;
}
location ~* ^.+\.(css|js|txt|xml|swf|wav)$ {
root /var/www/poseidon/root/static;
access_log off;
expires 24h;
}
#注:location不包括?后面带的参数,所以以上正则可以匹配http://192.168.1.16/image/sxxx.jpg?a=xxx

Node.js 究竟是什么?

Node 是一个服务器端 JavaScript 解释器,它将改变服务器应该如何工作的概念。它的目标是帮助程序员构建高度可伸缩的应用程序,编写能够处理数万条同时连接到一个(只有一个)物理机的连接代码。

 

清单 2. Node 随机数字生成器
// these modules need to be imported in order to use them.
// Node has several modules. They are like any #include
// or import statement in other languages
var http = require(“http”);
var url = require(“url”);

// The most important line in any Node file. This function
// does the actual process of creating the server. Technically,
// Node tells the underlying operating system that whenever a
// connection is made, this particular callback function should be
// executed. Since we’re creating a web service with REST API,
// we want an HTTP server, which requires the http variable
// we created in the lines above.
// Finally, you can see that the callback method receives a ‘request’
// and ‘response’ object automatically. This should be familiar
// to any PHP or Java programmer.
http.createServer(function(request, response) {

// The response needs to handle all the headers, and the return codes
// These types of things are handled automatically in server programs
// like Apache and Tomcat, but Node requires everything to be done yourself
response.writeHead(200, {“Content-Type”: “text/plain”});

// Here is some unique-looking code. This is how Node retrives
// parameters passed in from client requests. The url module
// handles all these functions. The parse function
// deconstructs the URL, and places the query key-values in the
// query object. We can find the value for the “number” key
// by referencing it directly – the beauty of JavaScript.
var params = url.parse(request.url, true).query;
var input = params.number;

// These are the generic JavaScript methods that will create
// our random number that gets passed back to the caller
var numInput = new Number(input);
var numOutput = new Number(Math.random() * numInput).toFixed(0);

// Write the random number to response
response.write(numOutput);

// Node requires us to explicitly end this connection. This is because
// Node allows you to keep a connection open and pass data back and forth,
// though that advanced topic isn’t discussed in this article.
response.end();

// When we create the server, we have to explicitly connect the HTTP server to
// a port. Standard HTTP port is 80, so we’ll connect it to that one.
}).listen(80);

// Output a String to the console once the server starts up, letting us know everything
// starts up correctly
console.log(“Random Number Generator Running…”);

启动应用程序
将上面的代码放入一个名为 “random.js” 的文件中。现在,要启动这个应用程序并运行它(以便创建 HTTP 服务器并监听端口 80 上的连接),只需在您的命令提示中输入以下命令:% node random.js。下面是服务器已经启动并运行时看起来的样子:
root@ubuntu:/home/moila/ws/mike# node random.js
Random Number Generator Running…

访问应用程序
应用程序已经启动并运行。Node 正在监听所有连接,我们来测试一下。由于我们创建了一个简单的 RESTful API,所以可以使用 Web 浏览器来访问这个应用程序。键入以下地址(确保您已完成了上面的步骤):http://localhost/?number=27。
您的浏览器窗口将更改到一个介于 0 到 27 之间的随机数字。单击浏览器上的 “重新载入” 按钮,您会得到另一个随机数字。就是这样,这就是您的第一个 Node 应用程序!

 

学习

获得产品和技术

Bootstrap

Bootstrap is a sleek, intuitive, and powerful front-end framework for faster and easier web development, created and maintained byMark Otto and Jacob Thornton.

To get started, checkout http://getbootstrap.com!

shell 上传目录

#!/bin/bash
updir=/root/wav
todir=/
sss=`find $updir -type d -printf $todir/’%P\n’| awk ‘{if ($0 == “”)next;print “mkdir ” $0}’`
aaa=`find $updir -type f -printf ‘put %p %P \n’`
ftp -nv spetechcular.com <<EOF
user quantong quantong2013
type binary
prompt
$sss
cd $todir
$aaa
quit
EOF