//package staff2.grewe.servlets;
// /usr/local/tomcat/logs

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;


public class WriteServlet extends HttpServlet {
    
        public void doGet(HttpServletRequest request,
                          HttpServletResponse response) throws ServletException, IOException {
              int value;
	      Process myProcess;
	      Runtime myRuntime;
                            
              PrintWriter out = response.getWriter();
              out.println("Attempting to Open file");
	      try{
		//IDEA 1: open directly in user's public_html directory
		//append if file exists
		//NOTE: directory you are writing into make mode 707
 		// this means it is readble by others (including nobody
	        //the owner of the servlet process) but, not readable or writeable
		//by other students.
		//Note: servlet is not user grewe so,
	        // file mode had to be 7*7 and had to exist first
		//Odd: above directories did not have to by 7*7
                // 755 was fine
		FileWriter fw = new FileWriter("/staff2/grewe/public_html/comments/g.txt", true);
		PrintWriter pw = new PrintWriter(fw);
		pw.println("Hi Lynne");
		out.println("hi");
		pw.close();


/*
		//IDEA 2: open in servlet's current directory and then copy
                // file to user's directory
 	        //PROBLEM: can open and create file in servlet's directory evne
     		//while file did not exist.  However, to be able to copy it
		//over to the user's directory then you need to have
		//that directory be writeable by all 7*7
		//Note: this will make the file mode of 744
		FileWriter fw = new FileWriter("fun.txt", true);
		PrintWriter pw = new PrintWriter(fw);
		out.println("Attempting to write");
		pw.println("Hi Lynne");
		out.println("hi");
		pw.close();
		//tried to move over file
              	myRuntime = Runtime.getRuntime();
	        //myProcess = myRuntime.exec("cp fun.txt /staff2/grewe/public_html/comments/fun.txt");
	        myProcess = myRuntime.exec("mv fun.txt /staff2/grewe/public_html/comments/fun.txt");
                InputStream myIS = myProcess.getInputStream();
	        out.println("Copying of file finished");
		while (( value = myIS.read() )  != -1)  {
             		//print out the character not the number value.
             		out.print((char) value);
                }
		//now wait for process
		myProcess.waitFor();
	
*/
              }catch (Exception e) {out.println(e.getMessage()); }
        }      
}