Lab 10: Networking

1. Review Lecture 11.
   
2. Log in to a computer that is running Linux and connected to the Intraweb.
   
3. Create an empty directory named javalab10/ in your directory.
4. Open Kate and change to the javalab10/ directory.
   
5. Retrieve a web page by telnetting to the HTTP port.
1. At the Kate shell prompt, type: 
• telnet home.umu.ac.ug 80
2. Carefully type the following without pressing backspace or making a mistake: 
• GET /index.html HTTP/1.0
  
3. Press enter two times. You should then see the HTML of the page displayed.
4. Repeat the exercise but redirect the output to a file and then view the file: 
• telnet home.umu.ac.ug 80 > test1.txt
• GET /index.html HTTP/1.0
  
• more test1.txt
  
5. Repeat but request only the header.
• telnet home.umu.ac.ug 80 > test2.txt
• HEAD /index.html HTTP/1.0
  
6. Repeat but use a file that is not on the server.
• telnet home.umu.ac.ug 80 > test3.txt
• GET /badfile.html HTTP/1.0
  
7. Repeat but use the command HELLO instead of GET.
• telnet home.umu.ac.ug 80 > test4.txt
• HELLO
  
6. Retrieve a web page using a Java web client that uses stream sockets.
1. Copy WebGet.java to your folder, open the source in Kate, and compile it.
2. To run the program, type: 
• java WebGet home.umu.ac.ug index.html > test5.txt
3. Repeat but use a file that is not on the server: 
• java WebGet home.umu.ac.ug badfile.html > test6.txt
  
7. Retrieve a web page using a Java web client that uses a URL connection.
1. Copy URLGet.java to your folder, open the source in Kate, and compile it.
2. To run the program, type: 
• java URLGet http://home.umu.ac.ug/os/index.html > test7.txt
3. Repeat but use a file that is not on the server: 
• java URLGet http://home.umu.ac.ug/badfile.html > test8.txt
  
8. Compress the folder using the Ark archiving program to produce javalab10.zip.
9. Send the javalab10.zip file to gvogl@umu.ac.ug as an attachment in a message with subject java lab 10.