samples/bsh/src/dolda/bsvc/ShellPage.java

   1 package dolda.bsvc;
   2
   3 import dolda.jsvc.*;
   4 import dolda.jsvc.util.*;
   5 import java.io.*;
   6 import bsh.Interpreter;
   7
   8 public class ShellPage extends SimpleWriter {
   9     private static class Console implements bsh.ConsoleInterface {
  10         ByteArrayOutputStream obuf = new ByteArrayOutputStream();
  11         ByteArrayOutputStream ebuf = new ByteArrayOutputStream();
  12         Reader in = new StringReader("");
  13         PrintStream out;
  14         PrintStream err;
  15         {
  16             try {
  17                 out = new PrintStream(obuf, false, "UTF-8");
  18                 err = new PrintStream(ebuf, false, "UTF-8");
  19             } catch(UnsupportedEncodingException e) {
  20                 throw(new Error(e));
  21             }
  22         }
  23
  24         public void error(Object msg) {
  25             getErr().println(msg);
  26         }
  27
  28         public void print(Object o) {
  29             getOut().print(o);
  30         }
  31
  32         public void println(Object o) {
  33             getOut().println(o);
  34         }
  35
  36         public PrintStream getOut() {
  37             return(out);
  38         }
  39
  40         public PrintStream getErr() {
  41             return(err);
  42         }
  43
  44         public Reader getIn() {
  45             return(in);
  46         }
  47     }
  48
  49     public void respond(Request req, PrintWriter out) {
  50         MultiMap<String, String> params = req.params();
  51         String cmd = params.get("cmd");
  52
  53         out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
  54         out.println("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" \"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">");
  55         out.println("<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en-US\">");
  56         out.println("<head>");
  57         out.println("<title>Shell</title>");
  58         out.println("<link rel=\"stylesheet\" type=\"text/css\" href=\"css\" />");
  59         out.println("</head>");
  60         out.println("<body>");
  61         out.println("<h1>Shell</h1>");
  62         if((req.method() == "POST") && (cmd != null)) {
  63             Console cons = new Console();
  64             Interpreter ip = new Interpreter(cons);
  65             Object resp;
  66             try {
  67                 ip.set("req", req);
  68                 resp = ip.eval(cmd);
  69                 out.println("<pre>");
  70                 out.println(Misc.htmlq((resp == null)?"(null)":(resp.toString())));
  71                 out.println("</pre>");
  72             } catch(bsh.EvalError exc) {
  73                 out.println("<h2>Evaluation error</h2>");
  74                 out.println("<pre>");
  75                 out.print(exc.toString());
  76                 out.println("</pre>");
  77                 if(exc instanceof bsh.TargetError) {
  78                     bsh.TargetError te = (bsh.TargetError)exc;
  79                     out.println("<h3>Target error</h3>");
  80                     out.println("<pre>");
  81                     te.getTarget().printStackTrace(out);
  82                     out.println("</pre>");
  83                 }
  84             }
  85             String eo = new String(cons.obuf.toByteArray(), Misc.utf8);
  86             String ee = new String(cons.ebuf.toByteArray(), Misc.utf8);
  87             cons = null;
  88             if(eo.length() > 0) {
  89                 out.println("<h2>Output</h2>");
  90                 out.println("<pre>");
  91                 out.println(Misc.htmlq(eo));
  92                 out.println("</pre>");
  93             }
  94             if(ee.length() > 0) {
  95                 out.println("<h2>Errors</h2>");
  96                 out.println("<pre>");
  97                 out.println(Misc.htmlq(ee));
  98                 out.println("</pre>");
  99             }
 100         }
 101         out.println("<form action=\"sh\" method=\"post\">");
 102         out.println("<textarea cols=\"80\" rows=\"5\" name=\"cmd\">");
 103         if(cmd != null)
 104             out.print(cmd);
 105         out.println("</textarea>");
 106         out.println("<input type=\"submit\" value=\"Evaluate\" />");
 107         out.println("<input type=\"reset\" value=\"Reset\" />");
 108         out.println("</form>");
 109         out.println("</body>");
 110         out.println("</html>");
 111     }
 112 }