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mirror of https://github.com/node-red/node-red.git synced 2023-10-10 13:36:53 +02:00
node-red/red/server.js
Nick O'Leary ec25191c98 Flow Engine refactor
Each flow/tab now exists as its own logical object. This is the ground
work for allowing flows to be added/removed/updated independently.
2015-11-02 15:58:29 +00:00

284 lines
10 KiB
JavaScript

/**
* Copyright 2013, 2015 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
var express = require('express');
var when = require('when');
var child_process = require('child_process');
var path = require("path");
var fs = require("fs");
var redNodes = require("./nodes");
var comms = require("./comms");
var storage = require("./storage");
var log = require("./log");
var i18n = require("./i18n");
var app = null;
var nodeApp = null;
var server = null;
var settings = null;
var runtimeMetricInterval = null;
function init(_server,_settings) {
server = _server;
settings = _settings;
comms.init(_server,_settings);
nodeApp = express();
app = express();
}
function start() {
return i18n.init()
.then(function() { return storage.init(settings)})
.then(function() { return settings.load(storage)})
.then(function() {
if (settings.httpAdminRoot !== false) {
require("./api").init(app,storage);
}
if (log.metric()) {
runtimeMetricInterval = setInterval(function() {
reportMetrics();
}, settings.runtimeMetricInterval||15000);
}
console.log("\n\n"+log._("runtime.welcome")+"\n===================\n");
if (settings.version) {
log.info(log._("runtime.version",{component:"Node-RED",version:"v"+settings.version}));
}
log.info(log._("runtime.version",{component:"Node.js ",version:process.version}));
log.info(log._("server.loading"));
redNodes.init(settings,storage,app);
return redNodes.load().then(function() {
var i;
var nodeErrors = redNodes.getNodeList(function(n) { return n.err!=null;});
var nodeMissing = redNodes.getNodeList(function(n) { return n.module && n.enabled && !n.loaded && !n.err;});
if (nodeErrors.length > 0) {
log.warn("------------------------------------------");
if (settings.verbose) {
for (i=0;i<nodeErrors.length;i+=1) {
log.warn("["+nodeErrors[i].name+"] "+nodeErrors[i].err);
}
} else {
log.warn(log._("server.errors",{count:nodeErrors.length}));
log.warn(log._("server.errors-help"));
}
log.warn("------------------------------------------");
}
if (nodeMissing.length > 0) {
log.warn(log._("server.missing-modules"));
var missingModules = {};
for (i=0;i<nodeMissing.length;i++) {
var missing = nodeMissing[i];
missingModules[missing.module] = (missingModules[missing.module]||[]).concat(missing.types);
}
var promises = [];
for (i in missingModules) {
if (missingModules.hasOwnProperty(i)) {
log.warn(" - "+i+": "+missingModules[i].join(", "));
if (settings.autoInstallModules && i != "node-red") {
serverAPI.installModule(i).otherwise(function(err) {
// Error already reported. Need the otherwise handler
// to stop the error propagating any further
});
}
}
}
if (!settings.autoInstallModules) {
log.info(log._("server.removing-modules"));
redNodes.cleanModuleList();
}
}
log.info(log._("runtime.paths.settings",{path:settings.settingsFile}));
redNodes.loadFlows().then(redNodes.startFlows);
comms.start();
}).otherwise(function(err) {
console.log(err);
});
});
}
function reportAddedModules(info) {
comms.publish("node/added",info.nodes,false);
if (info.nodes.length > 0) {
log.info(log._("server.added-types"));
for (var i=0;i<info.nodes.length;i++) {
for (var j=0;j<info.nodes[i].types.length;j++) {
log.info(" - "+
(info.nodes[i].module?info.nodes[i].module+":":"")+
info.nodes[i].types[j]+
(info.nodes[i].err?" : "+info.nodes[i].err:"")
);
}
}
}
return info;
}
function reportRemovedModules(removedNodes) {
comms.publish("node/removed",removedNodes,false);
log.info(log._("server.removed-types"));
for (var j=0;j<removedNodes.length;j++) {
for (var i=0;i<removedNodes[j].types.length;i++) {
log.info(" - "+(removedNodes[j].module?removedNodes[j].module+":":"")+removedNodes[j].types[i]);
}
}
return removedNodes;
}
function installNode(file) {
return when.promise(function(resolve,reject) {
resolve(redNodes.addFile(file).then(function(info) {
var module = redNodes.getModuleInfo(info.module);
module.nodes = module.nodes.filter(function(d) {
return d.id==info.id;
});
return reportAddedModules(module);
}));
});
}
function installModule(module) {
//TODO: ensure module is 'safe'
return when.promise(function(resolve,reject) {
if (/[\s;]/.test(module)) {
reject(new Error(log._("server.install.invalid")));
return;
}
if (redNodes.getModuleInfo(module)) {
// TODO: nls
var err = new Error("Module already loaded");
err.code = "module_already_loaded";
reject(err);
return;
}
log.info(i18n._("server.install.installing",{name: module}));
var installDir = settings.userDir || process.env.NODE_RED_HOME || ".";
var child = child_process.exec('npm install --production '+module,
{
cwd: installDir
},
function(err, stdin, stdout) {
if (err) {
var lookFor404 = new RegExp(" 404 .*"+module+"$","m");
if (lookFor404.test(stdout)) {
log.warn(log._("server.install.install-failed-not-found",{name:module}));
var e = new Error();
e.code = 404;
reject(e);
} else {
log.warn(log._("server.install.install-failed-long",{name:module}));
log.warn("------------------------------------------");
log.warn(err.toString());
log.warn("------------------------------------------");
reject(new Error(log._("server.install.install-failed")));
}
} else {
log.info(log._("server.install.installed",{name:module}));
resolve(redNodes.addModule(module).then(reportAddedModules));
}
}
);
});
}
function uninstallModule(module) {
return when.promise(function(resolve,reject) {
if (/[\s;]/.test(module)) {
reject(new Error(log._("server.install.invalid")));
return;
}
var installDir = settings.userDir || process.env.NODE_RED_HOME || ".";
var moduleDir = path.join(installDir,"node_modules",module);
if (!fs.existsSync(moduleDir)) {
return reject(new Error(log._("server.install.uninstall-failed",{name:module})));
}
var list = redNodes.removeModule(module);
log.info(log._("server.install.uninstalling",{name:module}));
var child = child_process.exec('npm remove '+module,
{
cwd: installDir
},
function(err, stdin, stdout) {
if (err) {
log.warn(log._("server.install.uninstall-failed-long",{name:module}));
log.warn("------------------------------------------");
log.warn(err.toString());
log.warn("------------------------------------------");
reject(new Error(log._("server.install.uninstall-failed",{name:module})));
} else {
log.info(log._("server.install.uninstalled",{name:module}));
reportRemovedModules(list);
resolve(list);
}
}
);
});
}
function reportMetrics() {
var memUsage = process.memoryUsage();
log.log({
level: log.METRIC,
event: "runtime.memory.rss",
value: memUsage.rss
});
log.log({
level: log.METRIC,
event: "runtime.memory.heapTotal",
value: memUsage.heapTotal
});
log.log({
level: log.METRIC,
event: "runtime.memory.heapUsed",
value: memUsage.heapUsed
});
}
function stop() {
if (runtimeMetricInterval) {
clearInterval(runtimeMetricInterval);
runtimeMetricInterval = null;
}
redNodes.stopFlows();
comms.stop();
}
var serverAPI = module.exports = {
init: init,
start: start,
stop: stop,
reportAddedModules: reportAddedModules,
reportRemovedModules: reportRemovedModules,
installModule: installModule,
uninstallModule: uninstallModule,
installNode: installNode,
get app() { return app },
get nodeApp() { return nodeApp },
get server() { return server }
}