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node-red/red/server.js

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/**
* Copyright 2013 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.
**/
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var express = require('express');
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var util = require('util');
var when = require('when');
var exec = require('child_process').exec;
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var createUI = require("./ui");
var redNodes = require("./nodes");
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var comms = require("./comms");
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var storage = require("./storage");
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var app = null;
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var nodeApp = null;
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var server = null;
var settings = null;
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function createServer(_server,_settings) {
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server = _server;
settings = _settings;
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comms.init(_server,_settings);
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nodeApp = express();
app = express();
if (settings.httpAdminRoot !== false) {
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if (!settings.disableEditor) {
createUI(settings,app);
}
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app.get("/flows",function(req,res) {
res.json(redNodes.getFlows());
});
app.post("/flows",
express.json(),
function(req,res) {
var flows = req.body;
redNodes.setFlows(flows).then(function() {
res.send(204);
}).otherwise(function(err) {
util.log("[red] Error saving flows : "+err);
res.send(500,err.message);
});
},
function(error,req,res,next) {
res.send(400,"Invalid Flow");
}
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);
app.get("/nodes",function(req,res) {
if (req.get("accept") == "application/json") {
res.json(redNodes.getNodeList());
} else {
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res.send(redNodes.getNodeConfigs());
}
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});
app.post("/nodes",
express.json(),
function(req,res) {
if (!settings.available()) {
res.send(400,new Error("Settings unavailable").toString());
return;
}
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var node = req.body;
var promise;
if (node.file) {
promise = redNodes.addNode(node.file).then(reportAddedModules);
} else if (node.module) {
var module = redNodes.getNodeModuleInfo(node.module);
if (module) {
res.send(400,"Module already loaded");
return;
}
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promise = installModule(node.module);
} else {
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res.send(400,"Invalid request");
return;
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}
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promise.then(function(info) {
res.json(info);
}).otherwise(function(err) {
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if (err.code === 404) {
res.send(404);
} else {
res.send(400,err.toString());
}
});
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},
function(err,req,res,next) {
console.log(err.toString());
res.send(400,err);
}
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);
app.delete("/nodes/:id",
function(req,res) {
if (!settings.available()) {
res.send(400,new Error("Settings unavailable").toString());
return;
}
var id = req.params.id;
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var removedNodes = [];
try {
var node = redNodes.getNodeInfo(id);
var promise = null;
if (!node) {
var module = redNodes.getNodeModuleInfo(id);
if (!module) {
res.send(404);
return;
} else {
promise = uninstallModule(id);
}
} else {
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promise = when.resolve([redNodes.removeNode(id)]).then(reportRemovedModules);
}
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promise.then(function(removedNodes) {
res.json(removedNodes);
}).otherwise(function(err) {
console.log(err.stack);
res.send(400,err.toString());
});
} catch(err) {
res.send(400,err.toString());
}
},
function(err,req,res,next) {
res.send(400,err);
}
);
app.get("/nodes/:id", function(req,res) {
var id = req.params.id;
var result = null;
if (req.get("accept") == "application/json") {
result = redNodes.getNodeInfo(id);
} else {
result = redNodes.getNodeConfig(id);
}
if (result) {
res.send(result);
} else {
res.send(404);
}
});
app.put("/nodes/:id",
express.json(),
function(req,res) {
if (!settings.available()) {
res.send(400,new Error("Settings unavailable").toString());
return;
}
var body = req.body;
if (!body.hasOwnProperty("enabled")) {
res.send(400,"Invalid request");
return;
}
try {
var info;
var id = req.params.id;
var node = redNodes.getNodeInfo(id);
if (!node) {
res.send(404);
} else if (!node.err && node.enabled === body.enabled) {
res.json(node);
} else {
if (body.enabled) {
info = redNodes.enableNode(id);
} else {
info = redNodes.disableNode(id);
}
if (info.enabled == body.enabled && !info.err) {
comms.publish("node/"+(body.enabled?"enabled":"disabled"),info,false);
util.log("[red] "+(body.enabled?"Enabled":"Disabled")+" node types:");
for (var i=0;i<info.types.length;i++) {
util.log("[red] - "+info.types[i]);
}
} else if (body.enabled && info.err) {
util.log("[red] Failed to enable node:");
util.log("[red] - "+info.name+" : "+info.err);
}
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res.json(info);
}
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} catch(err) {
res.send(400,err.toString());
}
}
);
}
}
function reportAddedModules(info) {
comms.publish("node/added",info,false);
if (info.length > 0) {
util.log("[red] Added node types:");
for (var i=0;i<info.length;i++) {
for (var j=0;j<info[i].types.length;j++) {
util.log("[red] - "+
(info[i].module?info[i].module+":":"")+
info[i].types[j]+
(info[i].err?" : "+info[i].err:"")
);
}
}
}
return info;
}
function reportRemovedModules(removedNodes) {
comms.publish("node/removed",removedNodes,false);
util.log("[red] Removed node types:");
for (var j=0;j<removedNodes.length;j++) {
for (var i=0;i<removedNodes[j].types.length;i++) {
util.log("[red] - "+(removedNodes[i].module?removedNodes[i].module+":":"")+removedNodes[j].types[i]);
}
}
return removedNodes;
}
function installModule(module) {
//TODO: ensure module is 'safe'
return when.promise(function(resolve,reject) {
if (/[\s;]/.test(module)) {
reject(new Error("Invalid module name"));
return;
}
util.log("[red] Installing module: "+module);
var child = exec('npm install --production '+module, function(err, stdin, stdout) {
if (err) {
var lookFor404 = new RegExp(" 404 .*"+module+"$","m");
if (lookFor404.test(stdout)) {
util.log("[red] Installation of module "+module+" failed: module not found");
var e = new Error();
e.code = 404;
reject(e);
} else {
util.log("[red] Installation of module "+module+" failed:");
util.log("------------------------------------------");
console.log(err.toString());
util.log("------------------------------------------");
reject(new Error("Install failed"));
}
} else {
util.log("[red] Installed module: "+module);
resolve(redNodes.addModule(module).then(reportAddedModules));
}
});
});
}
function uninstallModule(module) {
var list = redNodes.removeModule(module);
return when.promise(function(resolve,reject) {
if (/[\s;]/.test(module)) {
reject(new Error("Invalid module name"));
return;
}
util.log("[red] Removing module: "+module);
var child = exec('npm remove '+module, function(err, stdin, stdout) {
if (err) {
util.log("[red] Removal of module "+module+" failed:");
util.log("------------------------------------------");
console.log(err.toString());
util.log("------------------------------------------");
reject(new Error("Removal failed"));
} else {
util.log("[red] Removed module: "+module);
reportRemovedModules(list);
resolve(list);
}
});
});
}
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function start() {
var defer = when.defer();
storage.init(settings).then(function() {
settings.load(storage).then(function() {
console.log("\nWelcome to Node-RED\n===================\n");
if (settings.version) {
util.log("[red] Version: "+settings.version);
}
util.log("[red] Loading palette nodes");
redNodes.init(settings,storage);
redNodes.load().then(function() {
var i;
var nodes = redNodes.getNodeList();
var nodeErrors = nodes.filter(function(n) { return n.err!=null;});
var nodeMissing = nodes.filter(function(n) { return n.module && n.enabled && !n.loaded && !n.err;});
if (nodeErrors.length > 0) {
util.log("------------------------------------------");
if (settings.verbose) {
for (i=0;i<nodeErrors.length;i+=1) {
util.log("["+nodeErrors[i].name+"] "+nodeErrors[i].err);
}
} else {
util.log("[red] Failed to register "+nodeErrors.length+" node type"+(nodeErrors.length==1?"":"s"));
util.log("[red] Run with -v for details");
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}
util.log("------------------------------------------");
}
if (nodeMissing.length > 0) {
util.log("[red] Missing node 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)) {
util.log(" - "+i+": "+missingModules[i].join(", "));
installModule(i).otherwise(function(err) {
// Error already reported. Need the otherwise handler
// to stop the error propagating any further
});
}
}
}
defer.resolve();
redNodes.loadFlows();
}).otherwise(function(err) {
console.log(err);
});
comms.start();
});
}).otherwise(function(err) {
defer.reject(err);
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});
return defer.promise;
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}
function stop() {
redNodes.stopFlows();
comms.stop();
}
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module.exports = {
init: createServer,
start: start,
stop: stop
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}
module.exports.__defineGetter__("app", function() { return app });
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module.exports.__defineGetter__("nodeApp", function() { return nodeApp });
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module.exports.__defineGetter__("server", function() { return server });