CNT4713 Extra Credit 6

Due Wednesday 6/22 (late: 6/23 at 6am)
Worth 2 Extra Credit Points

Create a cgi script that calculates change. You may view an example of my running script at Ajax Script Video.

• Display a page that contains a div with some original text.
• The page should have three buttons:
  • Text button: when clicked, include some text that does not contain any HTML markup
  • HTML button: when clicked, include some text that contains HTML markup, like the h2 tag from the example in class.
  • Image button: when clicked, include some text that contains HTML markup that will insert an image in the page. Visit W3Schools for information about the img tag.
• You will need three additional scripts that are called using Ajax, one for each button.

Deploying the Assignment

Change the Script to a CGI

The following changes to your script will allow it to be run from ocelot.

• Set the extension on all your scripts to .cgi
• Add this statement as the first statement in the script file:
  

  #!/usr/bin/python

• If you do not have it, import the os module:
  

  import sys

• Add these statements as the first executable statements in your script. They will allow you to see any errors that are generated by your script and to see all output from your script:

  sys.stderr = sys.stdout
  print "Content-type: text/plain\n"

• To run the script, replace username with your FIU email username and script-name with the name of the script in the following URL:

  http://ocelot.aul.fiu.edu/~username/cgi-bin/script-name.cgi

Limiting Access to cgi-bin

We do not want other people (like hackers) to run your scripts (over and over again).

• Add a file named .htaccess to the cgi-bin folder
• Set the permissions on the file to 604:

  chmod 604 .htaccess

• Include the following in the .htaccess file, replacing your-fiu-username with your FIU username. Be very careful with this file. If you make a mistake, you will generate a 500 error.

  AuthType Basic
  AuthName "your-fiu-username cgi-bin access"
  AuthUserFile  /aul/homes/downeyt/etc/1605/registered.passwd
  Require user downeyt your-fiu-username
  <Files ~ "~">
  Order allow,deny
  Deny from all
  </Files>

• Use the password that I sent the other day to access your scripts from a browser.

Creating an Index Page in public_html

I want to be able to run your scripts on ocelot, without having to type the name of each script in the URL.

• Create a file named index.html in the public_html folder.
• Use my index page as a reference: Index Page.
• You may copy the source of my page and modify it with your name and the names of your script. If you did not do earlier extra credits, then omit those links from the index page.

Submitting the Assignment

To hand in the assignment, place all your scripts in the cgi-bin folder on ocelot. Zip the public_html folder, including the cgi-bin folder. DO NOT USE 7-ZIP or RAR!!!

• Please use the following command to your public_html folder.
  zip -r ~/username ~/public_html -x \*.zip
  Replacing username with your user name. This will create a file named username.zip.
• Check the size of the ZIP file, it should be less than 3 MB. If it is not, then you probably have another ZIP file stored in the ZIP archive. Delete it and re-zip.
• You then have a choice for submitting the file.
  • If you are logged onto ocelot, use my uploading program to upload the file. Enter this command at the command prompt:
    ~downeyt/cs/public/webftp/webftp.pl
  • If you are using winscp, then download the zip file to your computer; then, upload the file to me: Submitting homework on-line via the Web.
• Upload the file as binary.