CS320 HW5

Homework 5
CS320, Fall 2005

Due: Tuesday, Nov 22

Please upload your files using the online turnin server. The files should include all the source code, documentation, and an HTML file hw5.html, which contains a link to your JSP page on the CS server. Note that file uploading will be disabled automatically after 11:59PM of the due date, so please turn in your work on time.

[Reading]

Chapter 14 and 15 of the J2EE 1.4 Tutorial

[Problem Description]

For this assignment, add a registration page to the online bookmark manager you developed in Homework 4 so a user can create an new account. Also implement a custom tag <logout> so we can get rid of the last bit of scripting element from the application. Again, all features described in previous assignments must work; otherwise there will be a credit penalty of up to 30pt.

[Registration Page] (40pt)

In the registration page, ask the user to fill out a form for username, password, first name, last name, and email, as shown in the following example:

Username:
Password:
Retype password:
First Name (optional):
Last Name (optional):
Email (optional):

Your application should properly handle the following situations:

Errors, including but not limited to

required fields are empty
username is shorter than 4 characters
username conflicts with an existing username
password is shorter than 6 characters
password and re-typed password do not match
password consists of only letters and digits, i.e. a password must include at least one "special character" such as *, +, - & etc.

For each type of errors, output an error message and ask the user to re-enter the data. Note that validation of the input data should be implemented on the server side.

Optional fields are empty. Note that this should not be handled as an error.

[Logout Tag] (20pt)

Implement a <logout> tag so that instead of using scriptlets as described in Homework 3, your logout code should look somewhat like the following:

<c:if test="${! empty param.logout}">
<bb:logout />
<c:redirect url="Home.jsp" />
</c:if>

[Extra Credit Work]

For extra credit, modify your application so that it supports two types of users: regular and admin. Once an admin user is logged in, he or she can perform several operations that are not available to regular users:

(20pt) Delete or edit any bookmark.
(20pt) Disable any regular user account.
(20pt) Reset any regular user account password to a six-digit random number.

For even more extra credit, implement the following features:

(30pt) Keep a log of the admin operations in the database. For example, the database table for the log may consist of the following fields:

admin_id - id of the admin user
target_type - which could be either 'bookmark' or 'user'
operation_type - which could be either 'delete' or 'edit'
operation_ts - the time when the operation is performed

Also create a JSP page so admin users can view this log.

(20pt) Create a custom tag called <smartLink> which has two attributes: a boolean attribute test and a string attribute href. If the test attribute evaluates to true, the tag displays its body content enclosed in an <a> tag; otherwise the tag simply displays its body content. For example, <cs320:smartLink test="true" href="some_url">hello</cs320:smartLink> would display <a href="some_url">hello</a>, while <cs320:smartLink test="false" href="some_url">hello</cs320:smartLink> would simply displays hello.

Note that this tag may comes in handy when you try to display a list of folders in your bookmark manager application, for example:

<c:forEach items="${folders}" var="f">

<cs320:smartLink test="${f.id != currentFolder.id}" href="BookmarkManager.jsp?folder=${f.id}">f.name</cs320:smartLink>

</c:forEach>

The due date for the extra credit work is Tuesday, November 29, and you may turn it in as Homework 6. A hw6.html must be included, which contains a link to your JSP page on the CS server, and states which feature(s) you have implemented.