Add multi-objects delete

Readme.md

@@ -105,6 +105,19 @@ Likewise we also have `client.deleteFile()` as a more concise (yet less flexible
       // Logic
     });
 
+Delete multi-objects
+
+    var json2xml = require('json2xml');
+    var xml_data = '<?xml version="1.0" encoding="UTF-8"?>' + json2xml.toXml('Delete', { Object: [
+      { Key: '0/0/0.png'},
+      { Key: '0/0/1.png'},
+      { Key: '0/0/2.png'}
+    ]});
+    client.deleteAll(xml_data, function(err, res){
+      console.log(res.statusCode);
+      console.log(res.headers);
+    });
+
 ## Running Tests
 
 To run the test suite you must first have an S3 account, and create

lib/knox/auth.js

@@ -31,6 +31,7 @@ var keys = [
   , 'versioning'
   , 'versions'
   , 'website'
+  , 'delete'
 ];
 
 /**

lib/knox/client.js

@@ -297,6 +297,30 @@ Client.prototype.deleteFile = function(filename, headers, fn){
   }).end();
 };
 
+/**
+ * DELETE `elements` with optional `headers`
+ * and callback `fn` with a possible exception and the response.
+ *
+ * @param {String} elements
+ * @param {Object|Function} headers
+ * @param {Function} fn
+ * @api public
+ */
+
+Client.prototype.deleteAll = function(elements, headers, fn){
+  if ('function' == typeof headers) {
+    fn = headers;
+    headers = {};
+  }
+  headers = utils.merge({
+      'Content-Length': elements.length
+    , 'Content-MD5': crypto.createHash('md5').update(elements).digest('base64')
+  }, headers);
+  return this.request('POST', '/?delete', headers).on('response', function(res){
+    fn(null, res);
+  }).end(elements);
+};
+
 /**
  * Return a url to the given `filename`.
  *