There is nothing worse for a site owner to endure than to have his site hacked with no backup to restore from. Many people rely on the hosting providers backup feature or if unavailable make a copy themselves on a regular basis. Unfortunately, ‘Regular’ can mean weeks or months, depending on how serious the issue of security is for the site owner or webmaster. However people are not to blame; for most people data backup is a chore that needs to be get done with, much like flossing after a good meal.
Transferring files over FTP using PHP is easily done using various PHP functions and cURL. However transferring files over SFTP raises various problems and is not easily supported via PHP and cURL. phpseclib provides a nice library wrapper that enables easy access to the sftp protocol and various cryptography functions. phpseclib is designed to be fully interoperable with OpenSSL and other standardized cryptography programs and protocols.
The Crypto module is one of the important modules available for Node.js, and allows you to use it for encrypting content, creating digests and creating public-key signatures. In this post we will work with creating a simple message digest from some given content. Here we will create a Node.js server that responds with a cryptographic hash for the content provided. e.g if we query with the following url, passing the text
helloworld and the hash function name
md5 the server will return the digest of the text. Note that the crypto module requires OpenSSL to be available on the underlying platform. Although a toy program, this is an exercise in using the ‘crypto’ and ‘querystring’ modules.
I finally got my hands on the Raspberry Pi a few days back. My upcoming plan is to use the Pi as a Node.js server. If you haven’t heard of the open, platform-friendly, inexpensive $35 Linux-powered computing platform known as Raspberry Pi by now, you better do so. Starting with the Auduino, this is surely the start of inexpensive open-source hardware computing. Think of your traditional PC motherboard with integrated graphics, network, sound, HDMI, and keyboard/mouse shrunken down to the size of a deck of playing cards, and you’ll get the idea of what the Raspberry Pi is all about. Driven by an ARM1176JZF 700MHz processor, the Raspberry Pi has 256 megabytes of on-board RAM and hardware-accelerated graphics.
The Colors module is one of the simpler modules you could use with Node. You can use it to provide different color and style effects to the console.log string output. All of the output that you generate in the Node.js console is of a single color. This can make debugging harder as you cannot easily differentiate the output of one log from another.
This site is a digital habitat of Sameer, a freelance web developer working in PHP & MySQL.More