eXtropia: the open web technology company
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 ::   Tutorials
 ::   Presentations
Perl & CGI tutorials
 ::   Intro to Perl/CGI and HTML Forms
 ::   Intro to Windows Perl
 ::   Intro to Perl 5
 ::   Intro to Perl
 ::   Intro to Perl Taint mode
 ::   Sherlock Holmes and the Case of the Broken CGI Script
 ::   Writing COM Components in Perl

Java tutorials
 ::   Intro to Java
 ::   Cross Browser Java

Misc technical tutorials
 ::   Intro to The Web Application Development Environment
 ::   Introduction to XML
 ::   Intro to Web Design
 ::   Intro to Web Security
 ::   Databases for Web Developers
 ::   UNIX for Web Developers
 ::   Intro to Adobe Photoshop
 ::   Web Programming 101
 ::   Introduction to Microsoft DNA

Misc non-technical tutorials
 ::   Misc Technopreneurship Docs
 ::   What is a Webmaster?
 ::   What is the open source business model?
 ::   Technical writing
 ::   Small and mid-sized businesses on the Web

Offsite tutorials
 ::   ISAPI Perl Primer
 ::   Serving up web server basics
 ::   Introduction to Java (Parts 1 and 2) in Slovak


Introduction to Web Programming
Getting Information from a Remote Site  
  • So once you have a connection to a web server it is likely that the first thing you will want to do is get data. Getting data from a web server is as easy as opening a connection and uses a data stream to handle the flow of data between your application and the server.

  • Typically, you will read in a data file from a given URL using something like the following:

      Socket s = new Socket("www.extropia.com",
      DataInputStream d = new DataInputStream
      String line = d.readLine();
      System.out.println("line: " + line);
      System.out.println("" + url.openStream());
    catch (IOException e)
      System.out.println("Error: " + e);

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