The Definitive Guide to HTML5 WebSocket by Frank Salim, Vanessa Wang, Peter Moskovits

By Frank Salim, Vanessa Wang, Peter Moskovits

The Definitive consultant to HTML5 WebSocket is the final word insider’s WebSocket source. This innovative new internet expertise lets you harness the ability of actual real-time connectivity and construct responsive, smooth net applications.  

This publication comprises every thing net builders and designers want to know approximately WebSocket. It discusses how WebSocket-based architectures supply a dramatic relief in pointless community overhead and latency in comparison to older HTTP (Ajax) architectures, easy methods to layer primary protocols corresponding to XMPP and STOMP on best of WebSocket, and the way to safe WebSocket connections and set up WebSocket-based purposes to the firm. construct real-time internet functions with HTML5.  

This ebook:

* Introduces you to the WebSocket API and protocol
* Describes and offers real-world examples of protocol verbal exchange over WebSocket
* Explains WebSocket safety and company deployment

<h3>What you’ll learn</h3> * comprehend the WebSocket API and Protocol
* construct fast Messaging and Chat functions over WebSocket with XMPP (Extensible Messaging and Presence Protocol)
* enforce a Publish/Subscribe Messaging Protocol over WebSocket with STOMP (Simple textual content orientated Messaging Protocol)
* VNC with the distant Framebuffer Protocol
* study WebSocket safety Deployment issues for an firm WebSocket structure
<h3>Who this booklet is for</h3>
The Definitive advisor to HTML5 WebSocket is for net builders and designers who are looking to construct state of the art internet purposes with WebSocket. it's also designed for somebody who desires to enforce a versatile and scalable structure with integrated real-time connectivity and verbal exchange.
<h3>Table of Contents</h3><ol> * advent to HTML5 WebSocket 
* The WebSocket API 
* The WebSocket Protocol 
* development quick Messaging and Chat over WebSocket with XMPP 
* utilizing Messaging over WebSocket with STOMP
* VNC with the distant Framebuffer Protocol 
* WebSocket Security 
* Deployment concerns
* Appendix A: examining WebSocket Traffic 
* Appendix B: WebSocket Resources 
</ol>

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The script in Example 1-5 will print these environment variables. Example 1-5. pl in the directory cgi-bin and make it executable and readable by the server (that is, by the username under which the server runs). pl Your code can access any of these variables with $ENV{"somekey"}. However, some variables can be spoofed by the client side, so you should be careful if you rely on them for handling sensitive information. Let’s look at some of these environment variables. 6 The SERVER_SOFTWARE variable tells us what components are compiled into the server, and their version numbers.

Just remember to substitute /home/stas/src in the examples with the actual path being used. The next step is to move to the directory containing the source archives: panic% cd /home/stas/src Uncompress and untar both sources. gz | tar -xvf - Linux distributions supply tar and gzip and install them by default. org/, among other sources. The GNU versions are available for every platform that Apache supports. xx Installing mod_perl on Unix Platforms | 27 The next step is to create the Makefile. This is no different in principle from the creation of the Makefile for any other Perl module.

The mod_perl installation that follows has been tested on many mainstream Unix and Linux platforms. Unless you’re using a very nonstandard system, you should have no problems when building the basic mod_perl server. html. ” Before we continue, however, we have one important bit of advice: while you’re learning mod_perl, be sure that you experiment on a private machine and not on a production server. 0 in Three Steps You can install mod_perl in three easy steps: obtain the source files required to build mod_perl, build mod_perl, and install it.

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