9 WebSockets
The Hypertext Transfer Protocol (HTTP) is just great. Together with FTP, SMTP,
IMAP, and many others, it is part of the large family of text-based protocols exe-
cuted in the TCP/IP Application Layer. In these protocols, client and server com-
municate via messages in text form. The following listing demonstrates how easy
it is to “speak” HTTP with a web server:
user@host:~> telnet www.google.com 80
Trying 209.85.135.103...
Connected to http://www.l.google.com.
Escape character is ‚^]'.
GET /search?q=html5 HTTP/1.0
To run a Google search for the term html5, we first connect to http://www.google.com on
the port reserved for HTTP, port 80. The request has three parts: In the first part