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[ccsdk/distribution.git] / dgbuilder / red.js
1 /**
2  * Copyright 2013 IBM Corp.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  **/
16 var http = require('http');
17 var https = require('https');
18 var util = require("util");
19 var express = require("express");
20 var crypto = require("crypto");
21 var nopt = require("nopt");
22 var path = require("path");
23 var RED = require("./red/red.js");
24
25 var server;
26 var app = express();
27
28 var settingsFile = "./settings";
29 var flowFile;
30
31 var knownOpts = {
32     "settings":[path],
33     "v": Boolean,
34     "help": Boolean
35 };
36 var shortHands = {
37     "s":["--settings"],
38     "?":["--help"]
39 };
40 nopt.invalidHandler = function(k,v,t) {
41     // TODO: console.log(k,v,t);
42 }
43
44 var parsedArgs = nopt(knownOpts,shortHands,process.argv,2)
45
46 if (parsedArgs.help) {
47     console.log("Node-RED v"+RED.version());
48     console.log("Usage: node red.js [-v] [-?] [--settings settings.js] [flows.json]");
49     console.log("");
50     console.log("Options:");
51     console.log("  -s, --settings FILE  use specified settings file");
52     console.log("  -v                   enable verbose output");
53     console.log("  -?, --help           show usage");
54     console.log("");
55     console.log("Documentation can be found at http://nodered.org");
56     process.exit();
57 }
58 if (parsedArgs.argv.remain.length > 0) {
59     flowFile = parsedArgs.argv.remain[0];
60 }
61
62 if (parsedArgs.settings) {
63     settingsFile = parsedArgs.settings;
64 }
65 try {
66     var settings = require(settingsFile);
67 } catch(err) {
68     if (err.code == 'MODULE_NOT_FOUND') {
69         console.log("Unable to load settings file "+settingsFile);
70     } else {
71         console.log(err);
72     }
73     process.exit();
74 }
75
76 if (parsedArgs.v) {
77     settings.verbose = true;
78 }
79
80 if (settings.https) {
81     server = https.createServer(settings.https,function(req,res){app(req,res);});
82 } else {
83     server = http.createServer(function(req,res){app(req,res);});
84 }
85 server.setMaxListeners(0);
86
87 function formatRoot(root) {
88     if (root[0] != "/") {
89         root = "/" + root;
90     }
91     if (root.slice(-1) != "/") {
92         root = root + "/";
93     }
94     return root;
95 }
96
97 if (settings.httpRoot === false) {
98     settings.httpAdminRoot = false;
99     settings.httpNodeRoot = false;
100 } else {
101     settings.httpRoot = settings.httpRoot||"/";
102     settings.disableEditor = settings.disableEditor||false;
103 }
104
105 if (settings.httpAdminRoot !== false) {
106     settings.httpAdminRoot = formatRoot(settings.httpAdminRoot || settings.httpRoot || "/");
107     settings.httpAdminAuth = settings.httpAdminAuth || settings.httpAuth;
108 } else {
109     settings.disableEditor = true;
110 }
111
112 if (settings.httpNodeRoot !== false) {
113     settings.httpNodeRoot = formatRoot(settings.httpNodeRoot || settings.httpRoot || "/");
114     settings.httpNodeAuth = settings.httpNodeAuth || settings.httpAuth;
115 }
116
117 settings.uiPort = settings.uiPort||1880;
118 settings.uiHost = settings.uiHost||"0.0.0.0";
119 var appDir = path.dirname(require.main.filename);
120 if (settings.flowFile != null && settings.flowFile.indexOf(appDir) != -1){
121         settings.flowFile = flowFile || settings.flowFile;
122 }else{
123         settings.flowFile = flowFile || appDir + "/" + settings.flowFile;
124 }
125
126 RED.init(server,settings);
127
128 if (settings.httpAdminRoot !== false && settings.httpAdminAuth) {
129     app.use(settings.httpAdminRoot,
130         express.basicAuth(function(user, pass) {
131             return user === settings.httpAdminAuth.user && crypto.createHash('md5').update(pass,'utf8').digest('hex') === settings.httpAdminAuth.pass;
132         })
133     );
134 }
135 if (settings.httpNodeRoot !== false && settings.httpNodeAuth) {
136     app.use(settings.httpNodeRoot,
137         express.basicAuth(function(user, pass) {
138             return user === settings.httpNodeAuth.user && crypto.createHash('md5').update(pass,'utf8').digest('hex') === settings.httpNodeAuth.pass;
139         })
140     );
141 }
142 if (settings.httpAdminRoot !== false) {
143     app.use(settings.httpAdminRoot,RED.httpAdmin);
144 }
145 if (settings.httpNodeRoot !== false) {
146     app.use(settings.httpNodeRoot,RED.httpNode);
147 }
148
149 if (settings.httpStatic) {
150     settings.httpStaticAuth = settings.httpStaticAuth || settings.httpAuth;
151     if (settings.httpStaticAuth) {
152         app.use("/",
153             express.basicAuth(function(user, pass) {
154                 return user === settings.httpStaticAuth.user && crypto.createHash('md5').update(pass,'utf8').digest('hex') === settings.httpStaticAuth.pass;
155             })
156         );
157     }
158     app.use("/",express.static(settings.httpStatic));
159 }
160
161 function getListenPath() {
162     var listenPath = 'http'+(settings.https?'s':'')+'://'+
163                     (settings.uiHost == '0.0.0.0'?'127.0.0.1':settings.uiHost)+
164                     ':'+settings.uiPort;
165     if (settings.httpAdminRoot !== false) {
166         listenPath += settings.httpAdminRoot;
167     } else if (settings.httpStatic) {
168         listenPath += "/";
169     }
170     return listenPath;
171 }
172
173 RED.start().then(function() {
174     if (settings.httpAdminRoot !== false || settings.httpNodeRoot !== false || settings.httpStatic) {
175         server.on('error', function(err) {
176             if (err.errno === "EADDRINUSE") {
177                 util.log('[red] Unable to listen on '+getListenPath());
178                 util.log('[red] Error: port in use');
179             } else {
180                 util.log('[red] Uncaught Exception:');
181                 if (err.stack) {
182                     util.log(err.stack);
183                 } else {
184                     util.log(err);
185                 }
186             }
187             process.exit(1);
188         });
189         server.listen(settings.uiPort,settings.uiHost,function() {
190             if (settings.httpAdminRoot === false) {
191                 util.log('[red] Admin UI disabled');
192             }
193             process.title = 'node-red';
194             util.log('[red] Server now running at '+getListenPath());
195         });
196     } else {
197         util.log('[red] Running in headless mode');
198     }
199 }).otherwise(function(err) {
200     util.log("[red] Failed to start server:");
201     if (err.stack) {
202         util.log(err.stack);
203     } else {
204         util.log(err);
205     }
206 });
207
208
209 process.on('uncaughtException',function(err) {
210     util.log('[red] Uncaught Exception:');
211     if (err.stack) {
212         util.log(err.stack);
213     } else {
214         util.log(err);
215     }
216     process.exit(1);
217 });
218
219 process.on('SIGINT', function () {
220     RED.stop();
221     // TODO: need to allow nodes to close asynchronously before terminating the
222     // process - ie, promises 
223     process.exit();
224 });

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