COP3832, Assignment 4

Due 3/14 at the start of class.

You may NOT use CGI.pm for this assignment.

Upload the following files and hand in printouts of each:

1. access.conf
2. language.cgi
3. image.cgi
4. validate.cgi

Create a subdirectory of hw that is named content. Be sure that access is restricted to hw as it was in assignment 3.

Create four files in the content directory

• lang.html.en
• lang.html.es
• lang.html.de
• lang.html.fr
• Enable and turn on language negotiation in the  content directory. Modify access.conf to do this.
• Each page should represent a page in a different language. You do not need to get fancy, just place the appropriate language name in each file: English, Spanish, German, French. Of course, feel free to add actual language content to each page.
• Each page will also have a link to an image that will be explained below. To state it simply: whatever browser is used to reference the page, the image will indicate that this page is better viewed using a different browser.

Create a script that will have the same effect as language negotiation. However, the script takes care of all the details, it will not use the server's language negotiation abilities. Name the script language.cgi.

• The name of the page to be displayed will be in the query string. Nothing else except the name of the page will be in the query string. The final extension of en, es,de, or fr should not be included here.
• Extract the first langauge from the HTTP_ACCEPT_LANGUAGE environment variable.
• Append the first language as an extension to the page name from the query string.
• Use a relocation header to have the new page displayed. Be sure that the new page cannot be cached. 
• Place the script in your server's cgi-gin directory.

Create a script that will display one of the following images depending on the browser that is used to reference the page. Name the script image.cgi.

• For non MSIE browsers use
/home/scsfac/downeyt/public_html/images/bnrIE.gif
• For all MSIE browsers use
/home/scsfac/downeyt/public_html/images/nnc_lockup.gif
• For each of the language pages that you created above, include a statement like
  This page is best viewed using
  and then include an image tag that calls this script.
• You can detect the type of browser by searching for the string MSIE in the HTTP_USER_AGENT environment variable.
• Place the script in your server's cgi-bin directory.

Create a script that contains a form and validates that all the fields have been filled in. Do not use JavaScript to validate, use server side scripting with Perl. name the script validate.cgi.

• If the script is called for the first time, then just display the form.
• If the script is submitted with valid information, then print a nice thankyou page.
• If one of the fields is not filled in, then redisplay the form. The user's previous valid choices should still be present. Create a list of error messages indicating which fields need to be filled in.
• The form must contain the following
  • A text field.
  • A list of radio buttons. At least 3 buttons. None should be pre-checked.
  • A multiple selection list. At least 4 options. None should be pre-selected.
  • A submit button
• You may NOT use CGI.pm for this assignment.
• Refer to my page Making Froms Sticky.

Create a file named hw4.html in your hw directory on your server.

• Create a hypertext link to lang.html in the content directory. Please note that there is no such file in content. Since language negotitation is turned on in content, then one of the four pages should be displayed.
• Create a hypertext link to the language negotiation script for the page lang.html. When clicked, the appropriate page should be displayed.
• Create a hypertext link to the validation script.