CGS4825 Assignment 3

Section 01: Due 2/16 at 11:59 pm.
Section 02: Due 2/17 at 11:59 pm.

Create a new web app named hw3.

• Add a new link in the ROOT/index.html to the root of this context.
• Use the secure web.xml file. Edit it for your user name.
• I have provided a class named downey.hw3.Utilities. Use the static method in this class to copy a file to the browser. This class is included in the downey.jar.
  • Copy this jar file into the lib directory of your hw3 web app.
  • You must get a new copy of this jar file.
  • The path to this file on ocelot is
    ~downeyt/cs/public_html/cgs4825/jar/downey.jar
  • View the JavaDoc for this jar file: Documenation.
• I haved also uploaded coreservlets.jar
  • It contains all the Utility classes from the coreservlets package.
  • If you want to use it, copy it to your lib directory.
  • The path to this file on ocelot is
    ~downeyt/cs/public_html/cgs4825/jar/coreservlets.jar
• Edit the .cshrc file on ocelot, and add a path to the classes directory of this web app. Also add a path to the downey.jar file. If you want to use the coreservlets.jar file, then also add a path to it. Then run the command
  source  ~/.cshrc
• Once you have created the web app structure, add the web app to your host using your manager.
• Add an index.html in the root directory of the new web app.
  • Include all the tags for a well-defined web page.
  • Include a title.
  • Include your name.
  • Add a heading to the page.
  • Add a two-column table containing the following relative links. Each link should be in a separate data element.
    • A link to your servlet with no path info nor query string.
    • A link to your servlet that will open the images/mozilla.gif file from this web app.
    • A link to your servlet that will open the index.html file from this web app.
    • A link to your servlet that will open the index.html file from this web app. Display the file as text/plain, not text/html.
    • A link to your servlet that will display one of your sayings.
    • A link to your servlet that will generate the error that the index is out of range.
    • A link to your servlet that will generate the error that the query string is not a number.
• Add an images directory in the hw3 directory. Add the following images to this directory.
  • mozilla.png If you want to copy this from ocelot, then the path is
    ~downeyt/cs/public_html/cgs4825/images/mozilla.png
  • mozilla.jpg If you want to copy this from ocelot, then the path is
    ~downeyt/cs/public_html/cgs4825/images/mozilla.jpg
  • mozilla.gif If you want to copy this from ocelot, then the path is
    ~downeyt/cs/public_html/cgs4825/images/mozilla.gif
• Add a servlet that will generate a dynamic web page as described below.
  • Place your servlet in a package of your-user-name
  • Your servlet should be accessible from your Tomcat host port 8080 through the URL
    http://studentXX.cgs4825.cs.fiu.edu:8080/hw3/servlet/your-user-name.servlet-name
  • Your servlet will generate a dynamic page based on the Path Translated, Query String, Remote User, User Agent, and Accept.
    • If the Path Translated header is not null, then do the following
      • Do not call getWriter, nor try to write any output to the browser, except by calling my copyFile method.
      • If the Query String is not null, then use the value of the Query String as the content type that is sent to the browser.
      • If the Query String is null, then set the content type based on the file's extension
        • .gif extensions should send a content type of  image/gif
        • .png extensions should send a content type of  image/png
        • .jpg or .jpeg extensions should send a content type of image/jpeg
          Note: image/jpeg not image/jpg
        • .html extensions should send a content type of  text/html
        • .txt extensions should send a content type of  text/plain
        • If the extension does not match any of these, then set the content type as text/plain.
      • Call my copyFile method with the Path Translated header to copy the file to the browser.
    • If the Path Translated header is null, then do the following
      • If the Remote User header is not null, then display a personalized header. Otherwise, display a generic header.
      • Display a phrase based on the User Agent header
        • If the User Agent header contains Mozilla (in any case) then display the phrase
          This browser is based on Mozilla
        • If the User Agent header does not contain Mozilla (in any case) then display the phrase
          This browser is not based on Mozilla
      • Display an image based on the Accept header.
        • If the Accept header contains image/png ,then display mozilla.png from the images directory of the web app.
        • Else if the Accept header contains image/jpeg, then display mozilla.jpg from the images directory of the web app.
        • Else if the Accept header contains neither of the above, then display mozilla.gif from the images directory of the web app.
      • Create an array of strings as a member variable in your servlet. This array will be shared by all threads. The array should contain at least 6 famous sayings. You may not use any of the sayings that I used in my example for this assigment.
      • Include all the tags for a standard HTML page.
      • If the Query String equals all (in any case), then display all the sayings from the array.
      • If the Query String does not equal all (and is not null), then interpret the Query String as an index into the array
        • If the Query String is not a number, then display a specific error for this.
        • If the Query String is a number, but is not in range, then display an error message and inform the user of the correct range.
        • If the Query String is a valid index, then display the saying at that position in the array.
  • Test your servlet on
    • IE
    • Mozilla or Firefox
    • Test locally using Webclient from the textbook. Create a local web app that does not require a password to access. Use Webclient to set the headers.
  • I have an example running at
    http://student01.cgs4825.cs.fiu.edu/~tdowne99
    You will need to enter your ocelot username and Tomcat password in order to access this site.