DailyRotateFile.prototype.stream = function (options) {
var file = path.join(this.dirname, this._getFilename());
options = options || {};
var stream = new Stream();
var tail = {
file: file,
start: options.start
};
stream.destroy = common.tailFile(tail, function (err, line) {
if (err) {
return stream.emit('error', err);
}
try {
stream.emit('data', line);
line = JSON.parse(line);
stream.emit('log', line);
} catch (e) {
stream.emit('error', e);
}
});
if (stream.resume) {
stream.resume();
}
return stream;
};
ftpClient.ls(path, function(err, list) {
if (err || !list) {
// Officially only ftp codes 450, 550 and 451 mean strictly that
// the file doesn't exist, but let's assume that file doesn't exist
// anyway if we reached this point
var e = new Error("ENOENT - No such directory: " + path);
e.code = "ENOENT";
return callback(e);
}
var meta = {};
if (options.head)
return callback(null, meta);
// There can be no proper ETag support since there is no way to
// determine whether the directory contents have changed or not
// without getting its listing, which defeats the purpose of caching.
/*
meta.etag = calcEtag(stat);
if (options.etag === meta.etag) {
meta.notModified = true;
return callback(null, meta);
}
*/
var stream = new Stream();
var paused;
stream.readable = true;
stream.pause = function () {
if (paused === true) return;
paused = true;
};
stream.resume = function () {
if (paused === false) return;
paused = false;
getNext();
};
meta.stream = stream;
callback(null, meta);
var index = 0;
stream.resume();
function getNext() {
if (index === list.length)
return done();
var file = list[index++];
var entry = {
name: file.name,
path: path,
href: "#",
mime: (file.type === 1) ? "inode/directory" : getMime(file.name),
size: parseInt(file.size, 10),
etag: calcEtag(file.name, file.time, file.size)
};
stream.emit("data", entry);
if (!paused) {
getNext();
}
}
function done() {
stream.emit("end");
}
});