mirror of
https://github.com/Xahau/xahau.js.git
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JS: Rework remote framework.
This commit is contained in:
Arthur Britto
committed by
Stefan Thomas
Stefan Thomas
parent
ee7583d0ae
commit
a240efc38d
401
js/remote.js
401
js/remote.js
@@ -12,194 +12,347 @@ var util = require('util');
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var WebSocket = require('ws');
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// --> trusted: truthy, if remote is trusted
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var Remote = function(trusted, websocket_ip, websocket_port, trace) {
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this.trusted = trusted;
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this.websocket_ip = websocket_ip;
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this.websocket_port = websocket_port;
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this.id = 0;
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this.trace = trace;
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var Remote = function (trusted, websocket_ip, websocket_port, trace) {
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this.trusted = trusted;
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this.websocket_ip = websocket_ip;
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this.websocket_port = websocket_port;
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this.id = 0;
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this.trace = trace;
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this.ledger_closed = undefined;
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this.ledger_current_index = undefined;
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this.stand_alone = undefined;
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// Cache information for accounts.
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this.accounts = {
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};
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// Cache for various ledgers.
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// XXX Clear when ledger advances.
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this.ledgers = {
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'current' : {}
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};
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};
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var remoteConfig = function(config, server, trace) {
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var serverConfig = config.servers[server];
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var remoteConfig = function (config, server, trace) {
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var serverConfig = config.servers[server];
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return new Remote(serverConfig.trusted, serverConfig.websocket_ip, serverConfig.websocket_port, trace);
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return new Remote(serverConfig.trusted, serverConfig.websocket_ip, serverConfig.websocket_port, trace);
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};
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Remote.method('connect_helper', function() {
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var self = this;
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// XXX This needs to be determined from the network.
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var fees = {
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'default' : 100,
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'account_create' : 1000,
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'nickname_create' : 1000,
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'offer' : 100,
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};
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if (this.trace)
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console.log("remote: connect: %s", this.url);
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// For accounts we cache things like sequence numbers.
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var accounts = {
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// Consider sequence numbers stable if you know you're not generating bad transactions.
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// Otherwise, clear it to have it automatically refreshed from the network.
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this.ws = new WebSocket(this.url);
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// acount : { seq : __ }
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};
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var ws = this.ws;
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Remote.method('connect_helper', function () {
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var self = this;
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ws.response = {};
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if (this.trace)
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console.log("remote: connect: %s", this.url);
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ws.onopen = function() {
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this.ws = new WebSocket(this.url);
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var ws = this.ws;
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ws.response = {};
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ws.onopen = function () {
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if (this.trace)
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console.log("remote: onopen: %s", ws.readyState);
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ws.onclose = undefined;
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ws.onerror = undefined;
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self.done(ws.readyState);
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};
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ws.onerror = function () {
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if (this.trace)
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console.log("remote: onerror: %s", ws.readyState);
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ws.onclose = undefined;
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if (self.expire) {
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if (this.trace)
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console.log("remote: was expired");
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self.done(ws.readyState);
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}
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else
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{
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// Delay and retry.
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setTimeout(function () {
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if (this.trace)
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console.log("remote: onopen: %s", ws.readyState);
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console.log("remote: retry");
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ws.onclose = undefined;
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ws.onerror = undefined;
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self.connect_helper();
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}, 50); // Retry rate 50ms.
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}
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};
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self.done(ws.readyState);
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};
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// Covers failure to open.
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ws.onclose = function () {
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if (this.trace)
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console.log("remote: onclose: %s", ws.readyState);
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ws.onerror = function() {
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if (this.trace)
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console.log("remote: onerror: %s", ws.readyState);
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ws.onerror = undefined;
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ws.onclose = undefined;
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self.done(ws.readyState);
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};
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if (self.expire) {
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if (this.trace)
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console.log("remote: was expired");
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// Node's ws module doesn't pass arguments to onmessage.
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ws.on('message', function (json, flags) {
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var message = JSON.parse(json);
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// console.log("message: %s", json);
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self.done(ws.readyState);
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}
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else
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{
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// Delay and retry.
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setTimeout(function() {
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if (this.trace)
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console.log("remote: retry");
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if (message.type !== 'response') {
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console.log("unexpected message: %s", json);
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self.connect_helper();
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}, 50); // Retry rate 50ms.
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}
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};
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} else {
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var done = ws.response[message.id];
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// Covers failure to open.
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ws.onclose = function() {
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if (this.trace)
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console.log("remote: onclose: %s", ws.readyState);
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if (done) {
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done(message);
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ws.onerror = undefined;
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self.done(ws.readyState);
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};
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// Node's ws module doesn't pass arguments to onmessage.
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ws.on('message', function(json, flags) {
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var message = JSON.parse(json);
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// console.log("message: %s", json);
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if (message.type !== 'response') {
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console.log("unexpected message: %s", json);
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} else {
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var done = ws.response[message.id];
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if (done) {
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done(message);
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} else {
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console.log("unexpected message id: %s", json);
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}
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}
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});
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} else {
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console.log("unexpected message id: %s", json);
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}
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}
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});
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});
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// Target state is connectted.
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// done(readyState):
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// --> readyState: OPEN, CLOSED
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Remote.method('connect', function(done, timeout) {
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var self = this;
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Remote.method('connect', function (done, timeout) {
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var self = this;
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this.url = util.format("ws://%s:%s", this.websocket_ip, this.websocket_port);
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this.done = done;
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this.url = util.format("ws://%s:%s", this.websocket_ip, this.websocket_port);
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this.done = done;
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if (timeout) {
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if (timeout) {
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if (this.trace)
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console.log("remote: expire: false");
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this.expire = false;
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setTimeout(function () {
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if (this.trace)
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console.log("remote: expire: false");
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console.log("remote: expire: timeout");
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this.expire = false;
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self.expire = true;
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}, timeout);
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}
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else {
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if (this.trace)
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console.log("remote: expire: false");
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setTimeout(function () {
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if (this.trace)
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console.log("remote: expire: timeout");
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this.expire = true;
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}
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self.expire = true;
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}, timeout);
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}
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else {
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if (this.trace)
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console.log("remote: expire: false");
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this.expire = true;
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}
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this.connect_helper();
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this.connect_helper();
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});
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// Target stated is disconnected.
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Remote.method('disconnect', function(done) {
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var ws = this.ws;
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Remote.method('disconnect', function (done) {
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var ws = this.ws;
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ws.onclose = function() {
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if (this.trace)
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console.log("remote: onclose: %s", ws.readyState);
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ws.onclose = function () {
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if (this.trace)
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console.log("remote: onclose: %s", ws.readyState);
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done(ws.readyState);
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};
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done(ws.readyState);
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};
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ws.close();
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ws.close();
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});
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// Send a command. The comman should lack the id.
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// <-> command: what to send, consumed.
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Remote.method('request', function(command, done) {
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this.id += 1; // Advance id.
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Remote.method('request', function (request, onDone, onFailure) {
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this.id += 1; // Advance id.
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var ws = this.ws;
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var ws = this.ws;
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command.id = this.id;
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request.id = this.id;
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ws.response[command.id] = done;
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ws.response[request.id] = function (response) {
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if (this.trace)
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console.log("remote: response: %s", JSON.stringify(response));
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if (this.trace)
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console.log("remote: send: %s", JSON.stringify(command));
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if (onFailure && response.error)
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{
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onFailure(response);
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}
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else
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{
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onDone(response);
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}
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};
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ws.send(JSON.stringify(command));
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if (this.trace)
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console.log("remote: request: %s", JSON.stringify(request));
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ws.send(JSON.stringify(request));
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});
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Remote.method('ledger_closed', function(done) {
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assert(this.trusted); // If not trusted, need to check proof.
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Remote.method('request_ledger_closed', function (onDone, onFailure) {
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assert(this.trusted); // If not trusted, need to check proof.
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this.request({ 'command' : 'ledger_closed' }, done);
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this.request({ 'command' : 'ledger_closed' }, onDone, onFailure);
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});
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// Get the current proposed ledger entry. May be closed (and revised) at any time (even before returning).
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// Only for use by unit tests.
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Remote.method('ledger_current', function(done) {
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this.request({ 'command' : 'ledger_current' }, done);
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Remote.method('request_ledger_current', function (onDone, onFailure) {
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this.request({ 'command' : 'ledger_current' }, onDone, onFailure);
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});
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// <-> params:
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// --> ledger : optional
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// --> ledger_index : optional
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Remote.method('ledger_entry', function(params, done) {
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assert(this.trusted); // If not trusted, need to check proof, maybe talk packet protocol.
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// <-> request:
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// --> ledger : optional
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// --> ledger_index : optional
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// --> type
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Remote.method('request_ledger_entry', function (req, onDone, onFailure) {
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assert(this.trusted); // If not trusted, need to check proof, maybe talk packet protocol.
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params.command = 'ledger_entry';
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req.command = 'ledger_entry';
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this.request(params, done);
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if (req.ledger_closed)
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{
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// XXX Initial implementation no caching.
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this.request(req, onDone, onFailure);
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}
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else if (req.ledger_index)
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{
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// Current
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// XXX Only allow with standalone mode. Must sync response with advance.
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var entry;
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switch (req.type) {
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case 'account_root':
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var cache = this.ledgers.current.account_root;
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if (!cache)
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{
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cache = this.ledgers.current.account_root = {};
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}
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var entry = this.ledgers.current.account_root[req.account];
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break;
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default:
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// This type not cached.
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}
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if (entry)
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{
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onDone(entry);
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}
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else
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{
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// Not cached.
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// Submit request
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this.request(req, function (r) {
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// Got result.
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switch (req.type) {
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case 'account_root':
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this.ledgers.current.account_root.account = r;
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break;
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default:
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// This type not cached.
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}
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onDone(r);
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}, onFailure);
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}
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}
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});
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// Submit a json transaction.
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// done(value)
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// <-> value: { 'status', status, 'result' : result, ... }
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// done may be called up to 3 times.
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Remote.method('submit', function(json, done) {
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// this.request(..., function() {
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// });
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Remote.method('submit', function (json, private_key, onDone, onFailure) {
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var req = {};
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req.command = 'submit';
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req.json = json;
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if (private_key && !this.trusted)
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{
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onFailure({ 'error' : 'untrustedSever', 'request' : req });
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}
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else
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{
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this.request(req, onDone, onFailure);
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}
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});
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exports.Remote = Remote;
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exports.remoteConfig = remoteConfig;
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//
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// Higher level functions.
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//
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// vim:ts=4
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// Subscribe to a server to get the current and closed ledger.
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// XXX Set up routine to update on notification.
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Remote.method('server_subscribe', function (onDone, onFailure) {
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this.request({
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'command' : 'server_subscribe'
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}, function (r) {
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this.ledger_current_index = r.ledger_current_index;
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this.ledger_closed = r.ledger_closed;
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this.stand_alone = r.stand_alone;
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onDone();
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}, onFailure);
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});
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// Refresh accounts[account].seq
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// done(result);
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Remote.method('account_seq', function (account, onDone, onFailure) {
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var account_root_entry = this.accounts[account];
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if (account_root_entry && account_root_entry.seq)
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{
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onDone(account_root_entry.seq);
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}
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else
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{
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// Need to get the ledger entry.
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this.request_ledger_entry({
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'ledger' : this.ledger_closed,
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'account_root' : account
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}, function (r) {
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// Extract the seqence number from the account root entry.
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this.accounts[account].seq = r.seq;
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onDone(r.seq);
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}, onFailure);
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}
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});
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// A submit that fills in the sequence number.
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Remote.method('submit_seq', function (onDone, onFailure) {
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});
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exports.Remote = Remote;
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exports.remoteConfig = remoteConfig;
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exports.fees = fees;
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exports.accounts = accounts;
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// vim:sw=2:sts=2:ts=8
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