Perl Tutorials - Herong's Tutorial Examples - Version 5.30, by Dr. Herong Yang

Socket Communication Over the Internet

This chapter provides tutorial examples and notes on socket communication. Topics include the socket communication interface model; built-in functions for socket communication server and client; using listen() and accept() functions to play the server role; using connect() to play the client role.

What Is Socket Communication?

connect() - Establishing a Socket Communication

ReverseEchoer.pl - A Simple Socket Server Program

SocketClient.pl - A Simple Socket Client Program

gethostbyaddr() - Network Utility Functions

Socket.pm - The Socket Module

Conclusions:

  • A socket represents one end-point of a two-way communication link between two programs running on the Internet network.
  • connect() - Sends a communication request to a remote address that represents a port on the server system.
  • ReverseEchoer.pl is a socket communication server script example that uses listen() and accept() to take a remote client request.
  • SocketClient.pl is a socket communication client script example that uses connect() to make connection request to a remote server.
  • gethostbyaddr() returns the host name of the specified packed IP address.
  • Socket.pm is a Perl module that helps you to use socket related functions.

Table of Contents

 About This Book

 Perl on Linux Systems

 ActivePerl on Windows Systems

 Data Types: Values and Variables

 Expressions, Operations and Simple Statements

 User Defined Subroutines

 Perl Built-in Debugger

 Name Spaces and Perl Module Files

 Symbolic (or Soft) References

 Hard References - Addresses of Memory Objects

 Objects (or References) and Classes (or Packages)

 Typeglob and Importing Identifiers from Other Packages

 String Built-in Functions and Performance

 File Handles and Data Input/Output

 Open Files in Binary Mode

 Open Directories and Read File Names

 File System Functions and Operations

 Converting Perl Script to Executable Binary

 Using DBM Database Files

 Using MySQL Database Server

Socket Communication Over the Internet

 XML::Simple Module - XML Parser and Generator

 XML Communication Model

 SOAP::Lite - SOAP Server-Client Communication Module

 Perl Programs as IIS Server CGI Scripts

 CGI (Common Gateway Interface)

 XML-RPC - Remote Procedure Call with XML and HTTP

 RPC::XML - Perl Implementation of XML-RPC

 Integrating Perl with Apache Web Server

 CGI.pm Module for Building Web Pages

 LWP::UserAgent and Web Site Testing

 References

 Printable Copy - PDF Version

Socket Communication Over the Internet - Updated in 2014, by Dr. Herong Yang