src/org/ibex/mail/target/FileBasedMailbox.java

   1 // Copyright 2000-2005 the Contributors, as shown in the revision logs.
   2 // Licensed under the Apache Public Source License 2.0 ("the License").
   3 // You may not use this file except in compliance with the License.
   4
   5 package org.ibex.mail.target;
   6 import org.prevayler.*;
   7 import org.ibex.mail.*;
   8 import org.ibex.util.*;
   9 import org.ibex.io.*;
  10 import java.io.*;
  11 import java.nio.*;
  12 import java.nio.channels.*;
  13 import java.net.*;
  14 import java.util.*;
  15 import java.text.*;
  16 import javax.servlet.*;
  17 import javax.servlet.http.*;
  18
  19 /** An exceptionally crude implementation of Mailbox relying on POSIXy filesystem semantics */
  20 public class FileBasedMailbox extends Mailbox.Default {
  21
  22     public static final long MAGIC_DATE = 0;
  23     private static final char slash = File.separatorChar;
  24     private static final WeakHashMap<String,FileBasedMailbox> instances = new WeakHashMap<String,FileBasedMailbox>();
  25     public String toString() { return "[FileBasedMailbox " + path.getAbsolutePath() + "]"; }
  26     public Mailbox slash(String name, boolean create) { return getFileBasedMailbox(path.getAbsolutePath()+slash+name, create); }
  27
  28     // FIXME: should be a File()
  29     public static synchronized FileBasedMailbox getFileBasedMailbox(String path, boolean create) {
  30         try {
  31             FileBasedMailbox ret = instances.get(path);
  32             if (ret == null) {
  33                 if (!create && !(new File(path).exists())) return null;
  34                 instances.put(path, ret = new FileBasedMailbox(new File(path)));
  35             }
  36             return ret;
  37         } catch (Exception e) {
  38             Log.error(FileBasedMailbox.class, e);
  39             return null;
  40         }
  41     }
  42
  43     // Instance //////////////////////////////////////////////////////////////////////////////
  44
  45     private File path;
  46     private FileLock lock;
  47     private int uidNext;
  48     private int uidValidity;
  49
  50     // Helpers //////////////////////////////////////////////////////////////////////////////
  51
  52     private static void rmDashRf(File f) throws IOException {
  53         if (!f.isDirectory()) { f.delete(); return; }
  54         String[] children = f.list();
  55         for(int i=0; i<children.length; i++) rmDashRf(new File(f.getAbsolutePath() + slash + children[i]));
  56         f.delete();
  57     }
  58
  59     private FileBasedMailbox(File path) throws MailException, IOException, ClassNotFoundException {
  60         this.path = path;
  61         path.mkdirs();
  62
  63         // acquire lock
  64         File lockfile = new File(this.path.getAbsolutePath() + slash + ".lock");
  65         lock = new RandomAccessFile(lockfile, "rw").getChannel().tryLock();
  66         if (lock == null) throw new IOException("unable to lock FileBasedMailbox");
  67         uidValidity = (int)(lockfile.lastModified() & 0xffffffff);
  68         uidNext = 0;
  69         String[] files = path.list();
  70         for(int i=0; i<files.length; i++) {
  71             try {
  72                 if (files[i].indexOf('.') != -1) files[i] = files[i].substring(0, files[i].indexOf('.'));
  73                 int n = Integer.parseInt(files[i]);
  74                 if (n>=uidNext) uidNext = n;
  75             } catch(Exception e) { /* DELIBERATE */ }
  76         }
  77     }
  78
  79
  80     public Mailbox.Iterator  iterator()           { return new Iterator(); }
  81     public synchronized void add(Message message) { add(message, Mailbox.Flag.RECENT); }
  82     public String[] children() {
  83         Vec vec = new Vec();
  84         String[] list = path.list();
  85         for(int i=0; i<list.length; i++) {
  86             File f = new File(path.getAbsolutePath() + slash + list[i]);
  87             if (f.isDirectory() && f.getName().charAt(0) != '.') vec.addElement(list[i]);
  88         }
  89         return (String[])vec.copyInto(new String[vec.size()]);
  90     }
  91
  92     public int uidValidity() { return uidValidity; }
  93     public int uidNext() {  return uidNext; }
  94     public synchronized void add(Message message, int flags) {
  95         try {
  96             String name, fullname; File target, f;
  97             for(int i = uidNext; ; i++) {
  98                 name = i + ".";
  99                 fullname = path.getAbsolutePath() + slash + name;
 100                 target = new File(fullname);
 101                 f = new File(target.getCanonicalPath() + "-");
 102                 if (!f.exists() && !target.exists()) break;
 103                 Log.error(this, "aieeee!!!! target of add() already exists: " + target.getAbsolutePath());
 104             }
 105             Stream stream = new Stream(new FileOutputStream(f));
 106             message.getStream().transcribe(stream);
 107             stream.close();
 108             f.renameTo(new File(fullname));
 109             uidNext++;
 110             f = new File(fullname);
 111             if ((flags & Mailbox.Flag.SEEN) == Mailbox.Flag.SEEN) f.setLastModified(MAGIC_DATE);
 112         } catch (IOException e) { throw new MailException.IOException(e); }
 113         Log.info(this, path + " <= " + message.summary());
 114     }
 115
 116     private class Iterator extends Mailbox.Default.Iterator {
 117         int cur = -1;
 118         String[] files = path.list(new FilenameFilter() { public boolean accept(File dir, String name) {
 119             return name.endsWith(".");
 120         } });
 121         private File file() { return new File(path.getAbsolutePath() + slash + files[cur]); }
 122         public boolean done() { return cur >= files.length; }
 123         public boolean next() { cur++; return !done(); }
 124         public boolean seen() { return false; }
 125         public boolean recent() { return false; }
 126         public int num() { return cur+1; }  // EUDORA insists that message numbers start at 1, not 0
 127         public int uid() { return done() ? -1 : Integer.parseInt(files[cur].substring(0, files[cur].length()-1)); }
 128         public void delete() { File f = file(); if (f != null && f.exists()) f.delete(); }
 129         public void seen(boolean seen) { }
 130         public Headers head() {
 131             if (done()) return null;
 132             FileInputStream fis = null;
 133             try {
 134                 return new Headers.Original(new Stream(new FileInputStream(file())));
 135             } catch (IOException e) { throw new MailException.IOException(e);
 136             } finally { if (fis != null) try { fis.close(); } catch (Exception e) { /* DELIBERATE */ } }
 137         }
 138         public Message cur() {
 139             FileInputStream fis = null;
 140             try {
 141                 return Message.newMessage(new Fountain.File(file()));
 142                 //} catch (IOException e) { throw new MailException.IOException(e);
 143             } catch (Message.Malformed e) { throw new MailException(e.getMessage());
 144             } finally { if (fis != null) try { fis.close(); } catch (Exception e) { /* DELIBERATE */ } }
 145         }
 146     }
 147
 148     public static class Servlet extends HttpServlet {
 149         public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException { doGet(request, response); }
 150         private void frames(HttpServletRequest request, HttpServletResponse response, boolean top) throws IOException {
 151             String basename = request.getRequestURI();
 152             PrintWriter pw = new PrintWriter(response.getWriter());
 153             pw.println("<html>");
 154             if (top) {
 155                 pw.println("  <frameset rows='30%,*'>");
 156                 //pw.println("    <frame src='"+basename+"?frame=banner' marginwidth=0 marginheight=0 name=banner/>");
 157                 //pw.println("    <frame src='"+basename+"?frame=top' marginwidth=0 marginheight=0 name=top/>");
 158                 pw.println("    <frame src='"+basename+"?frame=topright' marginwidth=0 marginheight=0 name=topright/>");
 159                 pw.println("    <frame src='"+basename+"?frame=bottom' marginwidth=0 marginheight=0 name='bottom'/>");
 160             } else {
 161                 pw.println("  <frameset cols='150,*'>");
 162                 pw.println("    <frame src='"+basename+"?frame=topleft' marginwidth=0 marginheight=0 name=topleft/>");
 163                 pw.println("    <frame src='"+basename+"?frame=topright' marginwidth=0 marginheight=0 name=topright/>");
 164             }
 165             pw.println("  </frameset>");
 166             pw.println("</html>");
 167             pw.flush();
 168         }
 169
 170         public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
 171             String frame = request.getParameter("frame");
 172             String basename = request.getRequestURI();
 173
 174             if (frame == null) { frames(request, response, true); return; }
 175             if (frame.equals("top")) { frames(request, response, false); return; }
 176             if (frame.equals("banner")) { banner(request, response); return; }
 177             if (frame.equals("topleft")) { return; }
 178
 179             if (request.getServletPath().indexOf("..") != -1) throw new IOException(".. not allowed in image paths");
 180             ServletContext cx = getServletContext();
 181             String path = cx.getRealPath(request.getServletPath());
 182             Mailbox mbox = FileBasedMailbox.getFileBasedMailbox(path, false);
 183             if (mbox == null) throw new IOException("no such mailbox: " + path);
 184
 185             Vec msgs = new Vec();
 186             for(Mailbox.Iterator it = mbox.iterator(); it.next();) {
 187                 String[] s = new String[4];
 188                 Message m = it.cur();
 189                 s[0] = (m.from==null?"":m.from.toString(true));
 190                 s[1] = m.subject;
 191                 s[2] = (m.date + "").trim().replaceAll(" ","&nbsp;");
 192                 s[3] = it.num() + "";
 193                 msgs.addElement(s);
 194             }
 195             String[][] messages;
 196             msgs.copyInto(messages = new String[msgs.size()][]);
 197
 198             if ("bottom".equals(frame)) { bottom(request, response, messages, mbox); return; }
 199             if ("topright".equals(frame)) { topright(request, response, messages); return; }
 200         }
 201
 202         private void bottom(HttpServletRequest request, HttpServletResponse response, String[][] messages, Mailbox mbox)
 203             throws IOException {
 204             PrintWriter pw = new PrintWriter(response.getWriter());
 205             pw.println("<html>");
 206             pw.println("  <head>");
 207             pw.println("  <style>");
 208             pw.println("      body { margin: 10px; }");
 209             pw.println("      pre {");
 210             pw.println("         font-family: monospace;");
 211             pw.println("         background-color:  #F0F0E0;");
 212             pw.println("         color: rgb(0, 0, 0);");
 213             pw.println("         padding: 5px;");
 214             pw.println("         margin: 0px;");
 215             pw.println("         overflow: auto;");
 216             //pw.println("         width: 80%;");
 217             //pw.println("         border-style: solid;");
 218             //pw.println("         border-width: 1px;");
 219             pw.println("      }");
 220             pw.println("  </style>");
 221             pw.println("  </head>");
 222             pw.println("  <body>");
 223             if (request.getParameter("msgnum") != null) {
 224                 int target = Integer.parseInt(request.getParameter("msgnum"));
 225                 Mailbox.Iterator it = mbox.iterator();
 226                 while(it.next())
 227                     if (it.num() == target)
 228                         break;
 229                 if (it.cur() != null) {
 230                     pw.println("    <table width=100% border=0 cellspacing=0 style='border: 1px black solid; background-color:#F0F0E0;'>");
 231                     pw.println("      <tr style='border: 1px black solid; font-family: monospace'><td style='padding: 5px'>");
 232                     Headers h = it.cur().headers;
 233                     pw.println(" Subject: " + it.cur().subject +"<br>");
 234                     pw.println("    From: " + it.cur().from +"<br>");
 235                     pw.println("    Date: " + it.cur().date +"<br>");
 236                         /*
 237                     for(java.util.Enumeration e = h.names(); e.hasMoreElements();) {
 238                         String key = (String)e.nextElement();
 239                         if (key==null || key.length()==0 || key.equals("from") ||
 240                             key.equals("to") || key.equals("subject") || key.equals("date")) continue;
 241                         key = Character.toUpperCase(key.charAt(0)) + key.substring(1);
 242                         String val = h.get(key);
 243                         for(int i=key.length(); i<15; i++)pw.print(" ");
 244                         pw.print(key+": ");
 245                         pw.println(val);
 246                     }
 247                         */
 248                     pw.print("</td></tr><tr><td style='border-top: 1px black; border-top-style: dotted;'><pre>");
 249                     StringBuffer tgt = new StringBuffer();
 250                     it.cur().getBody().getStream().transcribe(tgt);
 251                     pw.println(tgt.toString());
 252                     pw.println("    </pre></td></tr></table>");
 253                 }
 254             }
 255             pw.println("  </body>");
 256             pw.println("</html>");
 257             pw.flush();
 258             pw.close();
 259         }
 260
 261         private void banner(HttpServletRequest request, HttpServletResponse response) throws IOException {
 262             String basename = request.getServletPath();
 263             String realpath = getServletContext().getRealPath(basename);
 264             MailingList list = MailingList.getMailingList(realpath);
 265             list.banner(request, response);
 266         }
 267
 268         private void topright(HttpServletRequest request, HttpServletResponse response, String[][] messages) throws IOException {
 269             PrintWriter pw = new PrintWriter(response.getWriter());
 270             String basename = request.getRequestURI();
 271             pw.println("<html>");
 272             pw.println("  <head>");
 273             pw.println("    <style>");
 274             pw.println("      TH, TD, P, LI {");
 275             pw.println("          font-family: helvetica, verdana, arial, sans-serif;");
 276             pw.println("          font-size: 12px;  ");
 277             pw.println("          text-decoration:none; ");
 278             pw.println("      }");
 279             pw.println("      body { margin: 10px; }");
 280             pw.println("      a:link    { color: #000; text-decoration: none; }");
 281             pw.println("      a:active  { color: #f00; text-decoration: none; }");
 282             pw.println("      a:visited { color: #777; text-decoration: none; }");
 283             pw.println("      a:hover   { color: #000; text-decoration: none; }");
 284             pw.println("      /* a:hover   { color: #00f; text-decoration: none; border-bottom: 1px dotted; } */");
 285             pw.println("    </style>");
 286             pw.println("  </head>");
 287             pw.println("  <body onKeyPress='doKey(event.keyCode)'>");
 288             pw.println("    <script>");
 289             pw.println("      var chosen = null;");
 290             pw.println("      var all = [];");
 291             pw.println("      function doKey(x) {");
 292             pw.println("          if (chosen == null) { choose(all[0]); return; }");
 293             pw.println("          switch(x) {");
 294             pw.println("              case 112: if (chosen.id > 0) choose(all[chosen.id-1]); break;");
 295             pw.println("              case 110: if (chosen.id < (all.length-1)) choose(all[1+(1*chosen.id)]); break;");
 296             pw.println("          }");
 297             pw.println("      }");
 298             pw.println("      function choose(who) {");
 299             pw.println("          who.style.background = '#ffc';");
 300             pw.println("          if (chosen != null) chosen.style.background = '#ccc';");
 301             pw.println("          parent.parent.bottom.location='"+basename+"?frame=bottom&msgnum='+who.id;");
 302             pw.println("          chosen = who;");
 303             pw.println("      }");
 304             pw.println("    </script>");
 305             pw.println("    <div style='border: 1px black solid;'><table width=100% border=0 cellpadding=0 cellspacing=0>");
 306             pw.println("    <tr><td style='padding: 4px' bgcolor=#eff7ff>");
 307             pw.flush();
 308             banner(request, response);
 309             pw.println("    </td></tr>");
 310             pw.println("    <tr><td>");
 311             pw.println("    <table width=100% cellpadding=0 cellspacing=0 style='border-top: 1px black solid; cursor:pointer;'>");
 312             boolean odd=true;
 313             for(int i=0; i<messages.length; i++) {
 314                 odd = !odd;
 315                 String[] m = messages[i];
 316                 pw.println("      <tr style='cursor:pointer; background: "+(odd?"#e8eef7":"white")+"' id='"+m[3]+"' "+
 317                            "onmouseover='this.style.color=\"blue\"' "+
 318                            "onmouseout='this.style.color=\"black\"' "+
 319                            "onclick='choose(this);'>");
 320                 pw.println("<td style='cursor:pointer; padding:5px; padding-bottom:2px'>"+m[0]+"</td>");
 321                 pw.println("<td style='cursor:pointer; padding:5px; padding-bottom:2px'>"+m[1]+"</td>");
 322                 pw.println("<td style='cursor:pointer; padding:5px; padding-bottom:2px'>"+m[2]+"</td>");
 323                 pw.println("</tr>");
 324                 pw.println("<script> all["+i+"] = document.getElementById('"+i+"'); </script>");
 325             }
 326             pw.println("    </table>");
 327             pw.println("    </td></tr>");
 328             pw.println("    </table></div>");
 329             pw.println("  </body>");
 330             pw.println("</html>");
 331             pw.flush();
 332             pw.close();
 333         }
 334     }
 335 }