use javascript to allow text pastes

The javascript converts the content of the textarea to a HTTP POST
request and sends the text as a file upload.

Signed-off-by: Florian Pritz <bluewind@xinu.at>

1 files changed, 61 insertions, 11 deletions

diff --git a/application/views/file/upload_form.php b/application/views/file/upload_form.php
index 4f5a01ebc..36c9308b8 100644
--- a/application/views/file/upload_form.php
+++ b/application/views/file/upload_form.php
@@ -23,19 +23,69 @@
 
         document.getElementById('file').addEventListener('change', checkFileUpload, false);
     }
+
+function encode64(inp){
+    var key="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+    var chr1,chr2,chr3,enc3,enc4,i=0,out="";
+    while(i<inp.length){
+        chr1=inp.charCodeAt(i++);if(chr1>127) chr1=88;
+        chr2=inp.charCodeAt(i++);if(chr2>127) chr2=88;
+        chr3=inp.charCodeAt(i++);if(chr3>127) chr3=88;
+        if(isNaN(chr3)) {enc4=64;chr3=0;} else enc4=chr3&63
+        if(isNaN(chr2)) {enc3=64;chr2=0;} else enc3=((chr2<<2)|(chr3>>6))&63
+        out+=key.charAt((chr1>>2)&63)+key.charAt(((chr1<<4)|(chr2>>4))&63)+key.charAt(enc3)+key.charAt(enc4);
+    }
+    return encodeURIComponent(out);
+}
+
+function gen_boundary() {
+  var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
+  var string_length = 40;
+  var randomstring = '';
+  for (var i=0; i<string_length; i++) {
+    var rnum = Math.floor(Math.random() * chars.length);
+    randomstring += chars.substring(rnum,rnum+1);
+  }
+  return randomstring;
+}
+function do_paste() {
+    var http = new XMLHttpRequest();
+    var url = "<?php echo site_url("file/do_upload/dumb"); ?>";
+    var CRLF = "\r\n";
+    var boundary = "--" + gen_boundary();
+    var body = "--" + boundary + CRLF
+      + 'Content-Disposition: form-data; name="file"; filename="stdin"' + CRLF
+      + "Content-Type: text/plain" + CRLF
+      + CRLF
+      + document.getElementById("textarea").value + CRLF
+      + "--" + boundary + "--" + CRLF + CRLF;
+    http.open("POST", url, true);
+
+    //Send the proper header information along with the request
+    http.setRequestHeader("Content-type", "multipart/form-data; boundary=" + boundary);
+    http.setRequestHeader("Authorization", "Basic " + encode64(":" + document.getElementById("textarea_password").value));
+
+    http.onreadystatechange = function() {//Call a function when the state changes.
+      if(http.readyState == 4 && http.status == 200) {
+        window.location = http.responseText;
+      }
+    }
+    http.send(body);
+}
+
+document.write('\
+  <p><b>OR</b></p>\
+  <form action="javascript: do_paste()">\
+    <p>\
+      <textarea id="textarea" name="content" cols="80" rows="20"></textarea><br />\
+      <div style="display: none">Email: <input type="text" name="email" size="20" /></div>\
+      Optional password (for deletion): <input id="textarea_password" type="password" name="password" size="10" /><br />\
+      <input  type="submit" value="Paste" name="process" />\
+    </p>\
+    </form>\
+');
     /* ]]> */
   </script>
-<?php if (false): ?>
-  <p><b>OR</b></p>
-  <?php echo form_open_multipart('file/do_paste'); ?>
-    <p>
-      <textarea name="content" cols="80" rows="20"></textarea><br />
-      <div style="display: none">Email: <input type="text" name="email" size="20" /></div>
-      Optional password (for deletion): <input type="password" name="password" size="10" /><br />
-      <input type="submit" value="Paste" name="process" />
-    </p>
-  </form>
-<?php endif; ?>
 </div>
 <br />
 <p>Uploads/pastes are deleted after <?php echo $upload_max_age; ?> days<?php if($small_upload_size > 0): ?>