| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 | 1× 1× 1× 1× 1× 1× 3× 3× 23× 3× 23× 1× 1× 1× 1× 1× 1× 1× 22× 22× 22× 22× 22× 22× 20× 19× 20× 18× 20× 4× 20× 16× 15× 22× 22× 1× 1× 19× 19× 19× 19× 19× 19× 19× 19× 19× 19× 1× 6× 3× 2× 2× 1× 3× 3× 2× 2× 1× 6× 1× 24× 24× 19× 5× 19× 4× 15× 1× 19× 1× 19× 14× 19× 19× 19× 19× 19× 19× 19× 19× 2× 17× 9× 9× 9× 9× 8× 8× 8× 7× 7× 1× 1× 19× 1× 19× 4× 15× 15× 15× 15× 15× 1× 15× 15× 15× 15× 15× 9× 9× 9× 9× 7× 7× 1× 1× 9× 1× 8× 1× 1× 1× 8× 8× 8× 8× 6× 6× 6× 6× 6× 6× 1× 6× 6× 6× 1× 2× 1× 2× 2× 1× 1× 22× 1× 1× 1× | // Copyright 2015-2016 Stephen Vickers <[email protected]> var dgram = require("dgram"); var events = require("events"); var net = require("net"); var os = require("os"); var util = require("util"); function _expandConstantObject(object) { var keys = []; for (var key in object) keys.push(key); for (var i = 0; i < keys.length; i++) object[object[keys[i]]] = parseInt(keys[i]); } var Transport = { Tcp: 1, Udp: 2 }; _expandConstantObject(Transport); var Facility = { Kernel: 0, User: 1, System: 3, Audit: 13, Alert: 14, Local0: 16, Local1: 17, Local2: 18, Local3: 19, Local4: 20, Local5: 21, Local6: 22, Local7: 23 }; _expandConstantObject(Facility); var Severity = { Emergency: 0, Alert: 1, Critical: 2, Error: 3, Warning: 4, Notice: 5, Informational: 6, Debug: 7 }; _expandConstantObject(Severity); var Client = function(target, options) { this.target = target || "127.0.0.1"; this.syslogHostname = os.hostname(); this.port = 514; this.tcpTimeout = 10000; this.transport = Transport.Udp; if (options) { if (options.syslogHostname) this.syslogHostname = options.syslogHostname; if (options.port) this.port = options.port; if (options.tcpTimeout) this.tcpTimeout = options.tcpTimeout; if (options.transport) { if (options.transport == Transport.Udp || options.transport == Transport.Tcp) this.transport = options.transport; } } this.getTransportRequests = []; return this; }; util.inherits(Client, events.EventEmitter); Client.prototype.buildFormattedMessage = function(message, options) { var elems = new Date().toString().split(/\s+/); var month = elems[1]; var day = elems[2]; var time = elems[4]; /** ** BSD syslog requires leading 0's to be a space. **/ Iif (day[0] == "0") day = " " + day.substr(1, 1); var timestamp = month + " " + day + " " + time; var pri = (options.facility * 8) + options.severity; var newline = message[message.length - 1] == "\n" ? "" : "\n"; var formattedMessage = "<" + pri + "> " + timestamp + " " + this.syslogHostname + " " + message + newline; return new Buffer(formattedMessage); }; Client.prototype.close = function () { if (this.transport == Transport.Tcp) { if (this.transport_) { this.transport_.destroy(); delete this.transport_; } else { this.onClose(); } } else Eif (this.transport == Transport.Udp) { if (this.transport_) { this.transport_.close(); delete this.transport_; } else { this.onClose(); } } return this; }; Client.prototype.log = function() { var message, options, cb; if (typeof arguments[0] === "string") message = arguments[0]; else throw new Error("first argument must be string"); if (typeof arguments[1] === "function") cb = arguments[1]; else if (typeof arguments[1] === "object") options = arguments[1]; if (typeof arguments[2] === "function") cb = arguments[2]; if (!cb) cb = function () {}; var facility = options ? options.facility : Facility.Local0; Iif (facility === undefined) facility = Facility.Local0; var severity = options ? options.severity : Severity.Informational; Iif (severity === undefined) severity = Severity.Informational; var fm = this.buildFormattedMessage(message, { facility: facility, severity: severity }); var me = this; this.getTransport(function(error, transport) { if (error) { cb(error); } else { if (me.transport == Transport.Tcp) { try { transport.write(fm, function(error) { Iif (error) { cb(new Error("net.write() failed: " + error.message)); } else { cb(); } }); } catch (err) { me.onError(err); cb(err); } } else Eif (me.transport == Transport.Udp) { try { transport.send(fm, 0, fm.length, me.port, me.target, function(error, bytes) { Iif (error) { cb(new Error("dgram.send() failed: " + error.message)); } else { cb(); } }); } catch (err) { me.onError(err); cb(err); } } else { cb(new Error("unknown transport '%s' specified to Client", me.transport)); } } }); return this; }; Client.prototype.getTransport = function(cb) { if (this.transport_ !== undefined) return cb(null, this.transport_); this.getTransportRequests.push(cb); Iif (this.connecting) return this; else this.connecting = true; var af = net.isIPv4(this.target) ? 4 : 6; var me = this; function doCb(error, transport) { while (me.getTransportRequests.length > 0) { var nextCb = me.getTransportRequests.shift(); nextCb(error, transport); } me.connecting = false; }; if (this.transport == Transport.Tcp) { var options = { host: this.target, port: this.port, family: af }; var transport; try { transport = net.createConnection(options, function() { me.transport_ = transport; doCb(null, me.transport_); }); } catch (err) { doCb(err); me.onError(err); }; if (!transport) return; transport.setTimeout(this.tcpTimeout, function() { var err = new Error("connection timed out"); me.emit("error", err); doCb(err); }); transport.on("end", function() { var err = new Error("connection closed"); me.emit("error", err); doCb(err); }); transport.on("close", me.onClose.bind(me)); transport.on("error", function (err) { doCb(err); me.onError(err); }); transport.unref(); } else Eif (this.transport == Transport.Udp) { this.transport_ = dgram.createSocket("udp" + af); this.transport_.on("close", this.onClose.bind(this)); this.transport_.on("error", function (err) { me.onError(err); doCb(err); }); this.transport_.unref(); doCb(null, this.transport_); } else { doCb(new Error("unknown transport '%s' specified to Client", this.transport)); } }; Client.prototype.onClose = function() { Iif (this.transport_) delete this.transport_; this.emit("close"); return this; }; Client.prototype.onError = function(error) { if (this.transport_) delete this.transport_; this.emit("error", error); return this; }; exports.Client = Client; exports.createClient = function(target, options) { return new Client(target, options); }; exports.Transport = Transport; exports.Facility = Facility; exports.Severity = Severity; |