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executable file
·337 lines (295 loc) · 8.82 KB
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var DnodeScrubber, DnodeSession, DnodeStore, EventEmitter, Scrubber, createId, exports, getAt, json, parseArgs, setAt, stream, _ref,
__bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; },
__hasProp = {}.hasOwnProperty,
__extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };
EventEmitter = require('events').EventEmitter;
_ref = require('jspath'), getAt = _ref.getAt, setAt = _ref.setAt;
Scrubber = require('scrubber');
createId = require('hat').rack();
stream = process.title === "browser" ? {} : require("stream");
json = typeof JSON !== "undefined" && JSON !== null ? JSON : require('jsonify');
exports = module.exports = function(wrapper) {
return {
sessions: {},
create: function() {
var id;
id = createId();
return this.sessions[id] = new DnodeSession(id, wrapper);
},
destroy: function(id) {
return delete this.sessions[id];
}
};
};
/**
* @class DnodeSession
* @description an implementation of the Session class from dnode-protocol
*/
exports.Session = DnodeSession = (function(_super) {
var apply;
__extends(DnodeSession, _super);
function DnodeSession(id, wrapper) {
this.id = id;
this.parse = __bind(this.parse, this);
this.remote = {};
this.instance = 'function' === typeof wrapper ? new wrapper(this.remote, this) : wrapper || {};
this.localStore = new DnodeStore;
this.remoteStore = new DnodeStore;
this.localStore.on('cull', (function(_this) {
return function(id) {
return _this.emit('request', {
method: 'cull',
"arguments": [id],
callbacks: {}
});
};
})(this));
}
DnodeSession.prototype.start = function() {
return this.request('methods', [this.instance]);
};
DnodeSession.prototype.request = function(method, args) {
var scrubber;
scrubber = new DnodeScrubber(this.localStore);
return scrubber.scrub(args, (function(_this) {
return function() {
var scrubbed;
scrubbed = scrubber.toDnodeProtocol();
scrubbed.method = method;
return _this.emit('request', scrubbed);
};
})(this));
};
DnodeSession.prototype.parse = function(line) {
var err, msg;
try {
msg = json.parse(line);
} catch (_error) {
err = _error;
this.emit('error', new SyntaxError("JSON parsing error: " + err));
}
return this.handle(msg);
};
DnodeSession.prototype.handle = function(msg) {
var args, method, scrubber;
scrubber = new DnodeScrubber(this.localStore);
args = scrubber.unscrub(msg, (function(_this) {
return function(callbackId) {
if (!_this.remoteStore.has(callbackId)) {
_this.remoteStore.add(callbackId, function() {
return _this.request(callbackId, [].slice.call(arguments));
});
}
return _this.remoteStore.get(callbackId);
};
})(this));
method = msg.method;
switch (method) {
case 'methods':
return this.handleMethods(args[0]);
case 'error':
return this.emit('remoteError', args[0]);
case 'cull':
return args.forEach((function(_this) {
return function(id) {
return _this.remoteStore.cull(id);
};
})(this));
default:
switch (typeof method) {
case 'string':
if (this.instance.propertyIsEnumerable(method)) {
return apply(this.instance[method], this.instance, args);
} else {
return this.emit('error', new Error("Request for non-enumerable method: " + method));
}
break;
case 'number':
return apply(this.localStore.get(method), this.instance, args);
}
}
};
DnodeSession.prototype.handleMethods = function(methods) {
if (methods == null) {
methods = {};
}
Object.keys(this.remote).forEach((function(_this) {
return function(key) {
return delete _this.remote[key];
};
})(this));
Object.keys(methods).forEach((function(_this) {
return function(key) {
return _this.remote[key] = methods[key];
};
})(this));
this.emit('remote', this.remote);
return this.emit('ready');
};
apply = function(fn, ctx, args) {
return fn.apply(ctx, args);
};
return DnodeSession;
})(EventEmitter);
/**
* @class DnodeScrubber
* @description an implementation of the Scrubber class from dnode-protocol that supports a middleware stack
*/
exports.Scrubber = DnodeScrubber = (function(_super) {
__extends(DnodeScrubber, _super);
function DnodeScrubber(store, stack, autoCull) {
var dnodeMutators, userStack, _ref1;
if (store == null) {
store = new DnodeStore;
}
if (autoCull == null) {
autoCull = true;
}
this.paths = {};
this.links = [];
dnodeMutators = [
function(cursor) {
var i, id, node, path;
node = cursor.node, path = cursor.path;
if ('function' === typeof node) {
i = store.indexOf(node);
if (~i && !(i in this.paths)) {
this.paths[i] = path;
} else {
if (autoCull) {
node.times = 1;
}
id = store.add(node);
this.paths[id] = path;
}
return cursor.update('[Function]', true);
}
}
];
userStack = (_ref1 = stack != null ? stack : DnodeScrubber.stack) != null ? _ref1 : [];
Scrubber.apply(this, dnodeMutators.concat(userStack));
}
DnodeScrubber.prototype.unscrub = function(msg, getCallback) {
var args;
args = msg["arguments"] || [];
Object.keys(msg.callbacks || {}).forEach(function(strId) {
var callback, id, path;
id = parseInt(strId, 10);
path = msg.callbacks[id];
callback = getCallback(id);
callback.id = id;
return setAt(args, path, callback);
});
(msg.links || []).forEach(function(link) {
return setAt(args, link.to, getAt(args, link.from));
});
return args;
};
DnodeScrubber.prototype.toDnodeProtocol = function() {
var out;
out = {
"arguments": this.out
};
out.callbacks = this.paths;
if (this.links.length) {
out.links = this.links;
}
return out;
};
return DnodeScrubber;
})(Scrubber);
/**
* @class DnodeStore
* @description an implementation of the Store class from dnode-protocol
*/
exports.Store = DnodeStore = (function(_super) {
__extends(DnodeStore, _super);
function DnodeStore() {
this.items = [];
}
DnodeStore.prototype.has = function(id) {
return this.items[id] != null;
};
DnodeStore.prototype.get = function(id) {
var item;
item = this.items[id];
if (item == null) {
return null;
}
return this.wrap(item, id);
};
DnodeStore.prototype.add = function(id, fn) {
var _ref1;
if (!fn) {
_ref1 = [id, fn], fn = _ref1[0], id = _ref1[1];
}
if (id == null) {
id = this.items.length;
}
this.items[id] = fn;
return id;
};
DnodeStore.prototype.cull = function(id) {
return delete this.items[id];
};
DnodeStore.prototype.indexOf = function(fn) {
return this.items.indexOf(fn);
};
DnodeStore.prototype.wrap = function(fn, id) {
return (function(_this) {
return function() {
fn.apply(_this, arguments);
return _this.autoCull(fn, id);
};
})(this);
};
DnodeStore.prototype.autoCull = function(fn, id) {
if (typeof fn.times !== 'number') {
return;
}
fn.times--;
if (fn.times > 0) {
return;
}
this.cull(id);
return this.emit('cull', id);
};
return DnodeStore;
})(EventEmitter);
parseArgs = exports.parseArgs = function(argv) {
var params;
params = {};
[].slice.call(argv).forEach(function(arg) {
switch (typeof arg) {
case 'string':
if (arg.match(/^\d+$/)) {
return params.port = parseInt(arg, 10);
} else if (arg.match("^/")) {
return params.path = arg;
} else {
return params.host = arg;
}
break;
case 'number':
return params.port = arg;
case 'function':
return params.block = arg;
case 'object':
if (arg.__proto__ === Object.prototype) {
return Object.keys(arg).forEach(function(key) {
return params[key] = arg[key];
});
} else if (stream.Stream && arg instanceof stream.Stream) {
return params.stream = arg;
} else {
return params.server = arg;
}
break;
case 'undefined':
break;
default:
throw new Error('Not sure what to do about ' + typeof arg + ' objects');
}
});
return params;
};