First cut of updateStatusWithMedia(), need to refactor some bits out

lib/twitter.js

@@ -41,6 +41,7 @@ function Twitter(options) {
 		callback_url: null,
 
 		rest_base: 'https://api.twitter.com/1',
+		upload_base: 'https://upload.twitter.com/1',
 		search_base: 'https://search.twitter.com',
 		stream_base: 'https://stream.twitter.com/1',
 		user_stream_base: 'https://userstream.twitter.com/2',
@@ -323,6 +324,61 @@ Twitter.prototype.updateStatus = function(text, params, callback) {
 	return this;
 }
 
+Twitter.prototype.updateStatusWithMedia = function(text, media, params, callback) {
+	if (typeof params === 'function') {
+		callback = params;
+		params = null;
+	}
+
+	var url = '/statuses/update_with_media.json';
+	var defaults = {
+		status: text
+	};
+	params = merge(defaults, params);
+
+	var multipart = [];
+	for (var name in params) {
+		multipart.push({
+			'content-disposition': 'form-data; name="' + name + '"',
+			body: params[name]
+		});
+	};
+
+	var self = this;
+	require('fs').readFile(media, function(error, data) {
+		if (error) callback(error);
+
+		multipart.push({
+			'content-disposition': 'form-data; name="media[]"',
+			'content-type': 'application/octet-stream',
+			body: data
+		});
+
+		self.request.post(self.options.upload_base + url, {
+			headers: merge(self.options.headers, {'content-type': 'multipart/form-data'}),
+			multipart: multipart
+		}, function(error, response, data) {
+			if (error) {
+				var err = new Error('HTTP Error '
+					+ error.statusCode + ': '
+					+ http.STATUS_CODES[error.statusCode]);
+				err.statusCode = error.statusCode;
+				err.data = error.data;
+				callback(err);
+			} else {
+				try {
+					var json = JSON.parse(data);
+					callback(json);
+				} catch(err) {
+					callback(err);
+				}
+			}
+		});
+	});
+
+	return this;
+}
+
 Twitter.prototype.destroyStatus = function(id, callback) {
 	var url = '/statuses/destroy/' + escape(id) + '.json';
 	this.post(url, null, null, callback);