Now with encryption and compression

src/paste.py

@@ -26,24 +26,24 @@ class Paste(object):
 
 
     def __init__(self, uuid=None, content=None,
-                 expire_in=u'burn_after_reading',
+                 expiration=u'burn_after_reading',
                  comments=None):
 
         self.content = content.encode('utf8')
         self.uuid = uuid or hashlib.sha1(self.content).hexdigest()
-        self.expire_in = self.get_expiration(expire_in)
+        self.expiration = self.get_expiration(expiration)
         self.comments = comments
 
 
 
 
-    def get_expiration(self, expire_in):
+    def get_expiration(self, expiration):
         """
             Return a tuple with the date at which the Paste will expire
             or if it should be destroyed after first reading.
         """
         try:
-            return datetime.now() + timedelta(seconds=self.DURATIONS[expire_in])
+            return datetime.now() + timedelta(seconds=self.DURATIONS[expiration])
         except KeyError:
             return u'burn_after_reading'
 
@@ -82,19 +82,19 @@ class Paste(object):
         try:
             paste = open(path)
             uuid = os.path.basename(path)
-            expire_in = paste.next()
+            expiration = paste.next()
             data = paste.next()
             comments = paste.read()[:-1] # remove the last coma
 
-            if expire_in != u'burn_after_reading':
-                expire_in = datetime.strptime(expire_in, '%Y-%m-%d %H:%M:%S.%f')
+            if expiration != u'burn_after_reading':
+                expiration = datetime.strptime(expiration, '%Y-%m-%d %H:%M:%S.%f')
 
         except StopIteration:
             raise TypeError(u'File %s is malformed' % path)
         except (IOError, OSError):
             raise ValueError(u'Can not open paste from file %s' % path)
 
-        return Paste(uuid=uuid, comments=comments, expire_in=expire_in, **data)
+        return Paste(uuid=uuid, comments=comments, expiration=expiration, **data)
 
 
     @classmethod
@@ -136,7 +136,7 @@ class Paste(object):
             self.DIR_CACHE.add((head, tail))
 
         with open(self.path, 'w') as f:
-            f.write(unicode(self.expire_in) + '\n')
+            f.write(unicode(self.expiration) + '\n')
             f.write(self.content + '\n')
             if self.comments:
                 f.write(comments)

start.py

@@ -31,8 +31,26 @@ def create_paste():
         content = u''
 
     if content:
-        expire_in = request.forms.get('expire_in', u'burn_after_reading')
-        paste = Paste(expire_in=expire_in, content=content)
+        expiration = request.forms.get('expiration', u'burn_after_reading')
+        paste = Paste(expiration=expiration, content=content)
+        paste.save()
+
+        return paste.uuid
+
+    return ''
+
+
+@app.route('/paste/<paste_id>')
+def display_paste(paste_id):
+
+    try:
+        paste = Paste.load(paste_id)
+    except (TypeError, ValueError):
+        return ''
+
+    if content:
+        expiration = request.forms.get('expiration', u'burn_after_reading')
+        paste = Paste(expiration=expiration, content=content)
         paste.save()
 
         return paste.uuid

static/js/behavior.js

@@ -1,11 +1,46 @@
-
+;
 // Start random number generator seeding ASAP
 sjcl.random.startCollectors();
 
 $(function(){
 
+function encrypt(key, content) {
+  content = lzw.compress(sjcl.encrypt(key, content));
+  content = sjcl.codec.utf8String.toBits(content);
+  return sjcl.codec.base64.fromBits(content);
+}
 
+function decrypt(key, content) {
+  content = sjcl.codec.base64.toBits(content);
+  content = sjcl.codec.utf8String.fromBits(content);
+  return sjcl.decrypt(key, lzw.decompress(content));
+}
 
+function make_key() {
+  return sjcl.codec.base64.fromBits(sjcl.random.randomWords(8, 0), 0);
+}
+
+$('button[type=submit]').click(function(e){
+
+  e.preventDefault();
+  var paste = $('textarea').val();
+
+  if (paste.trim()) {
+    var expiration = $('#expiration').val();
+    var key = make_key();
+    var data = {content: encrypt(key, paste), expiration: expiration}
+
+    $.post('/paste/create', data)
+     .error(function() {
+        alert('Paste could not be saved. Please try again later.');
+     })
+     .success(function(data) {
+        alert('success');
+        window.location = '/paste/' + data + '#' + key;
+     });
+  }
+
+});
 
 
 });

static/js/lzw.js

@@ -0,0 +1,236 @@
+// Author: Anthony McKale
+//
+// Note: modifed to javascript from orginal as2 found below
+// basically identical actual to as2
+//
+//
+// http://www.razorberry.com/blog/archives/2004/08/22/lzw-compression-methods-in-as2/
+//
+// A class for LZW compression modified from code posted at the following URL's
+// http://www.shoe-box.org/blog/index.php/2004/05/05/13-CompressionLzw
+// http://www.lalex.com/blog/comments/200405/164-compression-lzw-actionscript-2.html
+//
+var lzw = {
+    // Change this variable to output an xml safe string
+    xmlsafe : false,
+    compress : function(str){
+        var dico = new Array();
+        var skipnum = lzw.xmlsafe?5:0;
+        for (var i = 0; i < 256; i++)
+        {
+            dico[String.fromCharCode(i)] = i;
+        }
+        if (lzw.xmlsafe)
+        {
+            dico["<"] = 256;
+            dico[">"] = 257;
+            dico["&"] = 258;
+            dico["\""] = 259;
+            dico["'"] = 260;
+        }
+        var res = "";
+        var txt2encode = str;
+        var splitStr = txt2encode.split("");
+        var len = splitStr.length;
+        var nbChar = 256+skipnum;
+        var buffer = "";
+        for (var i = 0; i <= len; i++)
+        {
+            var current = splitStr[i];
+            if (dico[buffer + current] !== undefined)
+            {
+                buffer += current;
+            }
+            else
+            {
+                res += String.fromCharCode(dico[buffer]);
+                dico[buffer + current] = nbChar;
+                nbChar++;
+                buffer = current;
+            }
+        }
+        return res;
+    },
+    decompress : function (str)
+    {
+        var dico = new Array();
+        var skipnum = lzw.xmlsafe?5:0;
+        for (var i = 0; i < 256; i++)
+        {
+            var c = String.fromCharCode(i);
+            dico[i] = c;
+        }
+        if (lzw.xmlsafe)
+        {
+            dico[256] = "<";
+            dico[257] = ">";
+            dico[258] = "&";
+            dico[259] = "\"";
+            dico[260] = "'";
+        }
+        var txt2encode = str;
+        var splitStr = txt2encode.split("");
+        var length = splitStr.length;
+        var nbChar = 256+skipnum;
+        var buffer = "";
+        var chaine = "";
+        var result = "";
+        for (var i = 0; i < length; i++)
+        {
+            var code = txt2encode.charCodeAt(i);
+            var current = dico[code];
+            if (buffer == "")
+            {
+                buffer = current;
+                result += current;
+            }
+            else
+            {
+                if (code <= 255+skipnum)
+                {
+                    result += current;
+                    chaine = buffer + current;
+                    dico[nbChar] = chaine;
+                    nbChar++;
+                    buffer = current;
+                }
+                else
+                {
+                    chaine = dico[code];
+                    if (chaine == undefined) chaine = buffer + buffer.slice(0,1);
+                    result += chaine;
+                    dico[nbChar] = buffer + chaine.slice(0, 1);
+                    nbChar++;
+                    buffer = chaine;
+
+                }
+            }
+        }
+        return result;
+    }
+}
+
+
+// LZW-compress a string
+function lzw_encode(s) {
+    var dict = {};
+    var data = (s + "").split("");
+    var out = [];
+    var currChar;
+    var phrase = data[0];
+    var code = 256;
+    for (var i=1; i<data.length; i++) {
+        currChar=data[i];
+        if (dict[phrase + currChar] != null) {
+            phrase += currChar;
+        }
+        else {
+            out.push(phrase.length > 1 ? dict[phrase] : phrase.charCodeAt(0));
+            dict[phrase + currChar] = code;
+            code++;
+            phrase=currChar;
+        }
+    }
+    out.push(phrase.length > 1 ? dict[phrase] : phrase.charCodeAt(0));
+    for (var i=0; i<out.length; i++) {
+        out[i] = String.fromCharCode(out[i]);
+    }
+    return out.join("");
+}
+
+// Decompress an LZW-encoded string
+function lzw_decode(s) {
+    var dict = {};
+    var data = (s + "").split("");
+    var currChar = data[0];
+    var oldPhrase = currChar;
+    var out = [currChar];
+    var code = 256;
+    var phrase;
+    for (var i=1; i<data.length; i++) {
+        var currCode = data[i].charCodeAt(0);
+        if (currCode < 256) {
+            phrase = data[i];
+        }
+        else {
+           phrase = dict[currCode] ? dict[currCode] : (oldPhrase + currChar);
+        }
+        out.push(phrase);
+        currChar = phrase.charAt(0);
+        dict[code] = oldPhrase + currChar;
+        code++;
+        oldPhrase = phrase;
+    }
+    return out.join("");
+}
+
+
+
+/* utf.js - UTF-8 <=> UTF-16 convertion
+ *
+ * Copyright (C) 1999 Masanao Izumo <iz@onicos.co.jp>
+ * Version: 1.0
+ * LastModified: Dec 25 1999
+ * This library is free.  You can redistribute it and/or modify it.
+ */
+
+/*
+ * Interfaces:
+ * utf8 = utf16to8(utf16);
+ * utf16 = utf16to8(utf8);
+ */
+
+function utf16to8(str) {
+    var out, i, len, c;
+
+    out = "";
+    len = str.length;
+    for(i = 0; i < len; i++) {
+    c = str.charCodeAt(i);
+    if ((c >= 0x0001) && (c <= 0x007F)) {
+        out += str.charAt(i);
+    } else if (c > 0x07FF) {
+        out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
+        out += String.fromCharCode(0x80 | ((c >>  6) & 0x3F));
+        out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
+    } else {
+        out += String.fromCharCode(0xC0 | ((c >>  6) & 0x1F));
+        out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
+    }
+    }
+    return out;
+}
+
+function utf8to16(str) {
+    var out, i, len, c;
+    var char2, char3;
+
+    out = "";
+    len = str.length;
+    i = 0;
+    while(i < len) {
+    c = str.charCodeAt(i++);
+    switch(c >> 4)
+    {
+      case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
+        // 0xxxxxxx
+        out += str.charAt(i-1);
+        break;
+      case 12: case 13:
+        // 110x xxxx   10xx xxxx
+        char2 = str.charCodeAt(i++);
+        out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
+        break;
+      case 14:
+        // 1110 xxxx  10xx xxxx  10xx xxxx
+        char2 = str.charCodeAt(i++);
+        char3 = str.charCodeAt(i++);
+        out += String.fromCharCode(((c & 0x0F) << 12) |
+                       ((char2 & 0x3F) << 6) |
+                       ((char3 & 0x3F) << 0));
+        break;
+    }
+    }
+
+    return out;
+}

views/base.tpl

@@ -8,7 +8,7 @@
           content="0bin is a client-side-encrypted
                    pastebin with a burn after reading feature">
 
-    <!-- Le styles -->
+    <link rel="shortcut icon" href="/static/ico/favicon.ico">
     <link href="/static/css/bootstrap.css" rel="stylesheet">
     <link href="/static/css/style.css" rel="stylesheet">
 
@@ -17,8 +17,10 @@
       <script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script>
     <![endif]-->
 
-    <!-- Le fav and touch icons -->
-    <link rel="shortcut icon" href="/static/ico/favicon.ico">
+    <script src="/static/js/sjcl.js"></script>
+    <script src="/static/js/jquery-1.7.2.min.js"></script>
+    <script src="/static/js/behavior.js"></script>
+
   </head>
 
   <body>
@@ -82,9 +84,7 @@
 
     </div><!--/.fluid-container-->
 
-    <script src="/static/js/sjcl.js"></script>
-    <script src="/static/js/jquery.js"></script>
-    <script src="/static/js/behavior.js"></script>
+    <script src="/static/js/lzw.js"></script>
 
     <!--
     <script src="/static/js/jquery.js"></script>

views/home.tpl

@@ -1,28 +1,17 @@
 <form class="well" method="post" action="/paste/create">
 
-<ul>
-  <li>
-    <span class="btn-group">
-      <button class="btn">New Paste</button>
-      <button class="btn"><i class="icon-camera"></i>&nbsp;Clone</button>
-    </span>
-  </li>
-
-  <li>
-      <span class="paste-option">
-      <label for='expire_in'>Expiration:</label>
-        <select id="expire_in" name="expire_in">
-          <option value="burn_after_reading">Burn after reading</option>
-          <option value="10_minutes">10 minutes</option>
-          <option value="1_hour">1 hour</option>
-          <option selected value="1_day">1 day</option>
-          <option value="1_month">1 month</option>
-          <option value="never">Never</option>
-        </select>
-      <button type="submit" class="btn btn-primary">Submit</button>
-      <span>
-  </li>
-</ul>
+<p class="paste-option">
+<label >Expiration:</label>
+  <select id="expiration" name="expiration">
+    <option value="burn_after_reading">Burn after reading</option>
+    <option value="10_minutes">10 minutes</option>
+    <option value="1_hour">1 hour</option>
+    <option selected value="1_day">1 day</option>
+    <option value="1_month">1 month</option>
+    <option value="never">Never</option>
+  </select>
+<button type="submit" class="btn btn-primary">Submit</button>
+<p>
 
 <p>
     <textarea rows="10"  style="width:100%;"
@@ -31,28 +20,19 @@
 </p>
 
 
-<ul>
-  <li>
-    <span class="btn-group">
-      <button class="btn">New Paste</button>
-      <button class="btn"><i class="icon-camera"></i>&nbsp;Clone</button>
-    </span>
-  </li>
+<p class="paste-option">
+<label >Expiration:</label>
+  <select id="expiration" name="expiration">
+    <option value="burn_after_reading">Burn after reading</option>
+    <option value="10_minutes">10 minutes</option>
+    <option value="1_hour">1 hour</option>
+    <option selected value="1_day">1 day</option>
+    <option value="1_month">1 month</option>
+    <option value="never">Never</option>
+  </select>
+<button type="submit" class="btn btn-primary">Submit</button>
+<p>
 
-  <li>
-      <span class="paste-option">
-      <label >Expiration:</label>
-        <select id="expire_in" name="expire_in">
-          <option value="burn_after_reading">Burn after reading</option>
-          <option value="10_minutes">10 minutes</option>
-          <option value="1_hour">1 hour</option>
-          <option selected value="1_day">1 day</option>
-          <option value="1_month">1 month</option>
-          <option value="never">Never</option>
-        </select>
-      <button type="submit" class="btn btn-primary">Submit</button>
-      <span>
-  </li>
 </ul>
 
 </form>

views/paste.tpl

@@ -0,0 +1,60 @@
+<form class="well" method="post" action="/paste/create">
+
+<ul>
+  <li>
+    <span class="btn-group">
+      <button class="btn">New Paste</button>
+      <button class="btn"><i class="icon-camera"></i>&nbsp;Clone</button>
+    </span>
+  </li>
+
+  <li>
+      <span class="paste-option">
+      <label for='expire_in'>Expiration:</label>
+        <select id="expire_in" name="expire_in">
+          <option value="burn_after_reading">Burn after reading</option>
+          <option value="10_minutes">10 minutes</option>
+          <option value="1_hour">1 hour</option>
+          <option selected value="1_day">1 day</option>
+          <option value="1_month">1 month</option>
+          <option value="never">Never</option>
+        </select>
+      <button type="submit" class="btn btn-primary">Submit</button>
+      <span>
+  </li>
+</ul>
+
+<p>
+    <textarea rows="10"  style="width:100%;"
+              class="input-xlarge"
+              id="content" name="content"></textarea>
+</p>
+
+
+<ul>
+  <li>
+    <span class="btn-group">
+      <button class="btn">New Paste</button>
+      <button class="btn"><i class="icon-camera"></i>&nbsp;Clone</button>
+    </span>
+  </li>
+
+  <li>
+      <span class="paste-option">
+      <label >Expiration:</label>
+        <select id="expire_in" name="expire_in">
+          <option value="burn_after_reading">Burn after reading</option>
+          <option value="10_minutes">10 minutes</option>
+          <option value="1_hour">1 hour</option>
+          <option selected value="1_day">1 day</option>
+          <option value="1_month">1 month</option>
+          <option value="never">Never</option>
+        </select>
+      <button type="submit" class="btn btn-primary">Submit</button>
+      <span>
+  </li>
+</ul>
+
+</form>
+
+%rebase base