/*
* Get206LGrade.java 97/12/30
*
* Copyright (c) 1997 Ralph Freese
*
*/
import java.io.*;
import java.util.*;
import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;
/**
* Get 206L Grade servlet. This servlet let students lookup their grades on
* the net.
*
* There are no init parameters. We use a hidden field to specify
* where the grade file is.
*
* fields:
*
* socsecno the students SS#.
* filename file with grades (hidden)
* section
*
*
* @version 1.0, 97/12/30
* @author Ralph Freese
*/
public class Get206LGrade extends HttpServlet {
private String gradeFile;
private String section;
final private String head1 =
"| Lab 1 | Lab 2 | Lab 3 | Lab 4 | Lab 5 | Lab 6"
+ " | Lab 7 | Lab 9 | Lab 10 |
|---|
";
final private String head2 = "| Quiz 1 | Quiz 2 | Quiz 3 |
|---|
";
public void doPost (HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
doGet(req, res);
}
public void doGet (HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
section = req.getParameter("section");
gradeFile = "/home/ralph/private_html/206L/section" + section + ".txt";
String socsecno = req.getParameter("socsecno");
res.setContentType("text/html");
ServletOutputStream out = res.getOutputStream();
if (!checkSS(socsecno)) {
out.println("");
out.println("Bad SS");
out.println("");
out.println("Bad Social Security Number:
");
out.println("You must fill in all 9 digits.");
out.println("Do not put any dashes.");
out.println("You can press your back button to go back and ");
out.println("and fill in again.");
out.println("");
} else {
String gradeLine = getGradeLine(socsecno);
if (gradeLine == null) {
out.println("");
out.println("
Grade Not Found");
out.println("");
out.println("Grade Not Found
");
out.println("Sorry, your grade was not found.");
out.println("Be sure your Social Security number is correct.");
out.println("You can press your back button to go back and ");
out.println("and fill in again.");
out.println("Also, make sure you choose the right section.
");
out.println("");
} else {
Vector grades = new Vector(9);
Vector quizzes = new Vector(3);
int count = 0;
StringTokenizer st = new StringTokenizer(gradeLine,"\t",true);
String tok = null;
st.nextToken(); // name
st.nextToken(); // tab
st.nextToken(); // ss#
st.nextToken(); // tab
while (st.hasMoreTokens() && count < 9) {
count++;
tok = st.nextToken(); // lab hw grade
if (!tok.equals("\t")) {
grades.addElement(tok);
if (st.hasMoreTokens()) { st.nextToken(); }
} else {
grades.addElement(" ");
}
}
while (st.hasMoreTokens()) {
tok = st.nextToken(); // quiz grade
if (!tok.equals("\t")) {
quizzes.addElement(tok);
if (st.hasMoreTokens()) { st.nextToken(); }
} else {
quizzes.addElement(" ");
}
}
out.println("");
out.println("
206L Grades");
out.println("");
out.println("Your Grades
");
out.println("Math 206L, Section " + section + "
");
out.println("Student Number: " + socsecno + "
");
out.println("Homework Grades
");
out.println("");
out.println(head1);
out.print("\n ");
Enumeration elems = grades.elements();
String grade, color;
while (elems.hasMoreElements()) {
grade = (String)elems.nextElement();
if (grade.equals(" ")) {
color = "\"#FF0000\"";
} else {
color = "\"#00FFFF\"";
}
out.print("| " + grade);
}
out.println(" |
");
out.println("
");
out.println("Quiz Grades
");
out.println("");
out.println(head2);
elems = quizzes.elements();
out.print("\n ");
while (elems.hasMoreElements()) {
grade = (String)elems.nextElement();
if (grade.equals(" ")) {
color = "\"#FF0000\"";
} else {
color = "\"#00FFFF\"";
}
out.print("| " + grade);
}
out.println(" |
");
out.println("
");
out.println("");
}
}
}
public boolean checkSS(String ss) {
if (ss.length() != 9) { return false; }
String ss_cap = ss.toUpperCase();
if (! ss.equals(ss_cap)) { return false; }
return true;
}
public String getGradeLine(String ss) {
FileReader f = null;
try {
f = new FileReader(gradeFile);
} catch (FileNotFoundException e) {
System.out.println("file not found"); }
BufferedReader file = new BufferedReader(f);
String line = null;
String tok;
StringTokenizer st = null;
boolean found = false;
try {
while (!found && (line = file.readLine()) != null) {
st = new StringTokenizer(line,"\t",false);
st.nextToken(); // First field is name; second is ss#
tok = st.nextToken();
if (ss.equals(tok)) { found = true; }
}
} catch (IOException e) { System.out.println("IOException"); }
return line;
}
}