596 lines
15 KiB
JavaScript
Executable file
596 lines
15 KiB
JavaScript
Executable file
#!/usr/bin/env node
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//
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// bunyan -- filter and pretty-print JSON logs, like Bunyan logs.
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//
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// See <https://github.com/trentm/node-bunyan>.
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//
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var VERSION = "0.6.5";
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var util = require('util');
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var pathlib = require('path');
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var vm = require('vm');
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var http = require('http');
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var warn = console.warn;
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//---- globals and constants
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// Output modes.
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var OM_PAUL = 1;
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var OM_JSON = 2;
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var OM_INSPECT = 3;
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var OM_SIMPLE = 4;
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var OM_FROM_NAME = {
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"paul": OM_PAUL,
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"json": OM_JSON,
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"inspect": OM_INSPECT,
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"simple": OM_SIMPLE
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}
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// Levels
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var TRACE = 10;
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var DEBUG = 20;
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var INFO = 30;
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var WARN = 40;
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var ERROR = 50;
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var FATAL = 60;
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var levelFromName = {
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'trace': TRACE,
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'debug': DEBUG,
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'info': INFO,
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'warn': WARN,
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'error': ERROR,
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'fatal': FATAL
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};
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var nameFromLevel = {};
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var upperNameFromLevel = {};
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var upperPaddedNameFromLevel = {};
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Object.keys(levelFromName).forEach(function (name) {
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var lvl = levelFromName[name];
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nameFromLevel[lvl] = name;
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upperNameFromLevel[lvl] = name.toUpperCase();
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upperPaddedNameFromLevel[lvl] = (
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name.length === 4 ? ' ' : '') + name.toUpperCase();
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});
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//---- support functions
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function getVersion() {
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return VERSION;
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}
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var format = util.format;
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if (!format) {
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// If not node 0.6, then use its `util.format`:
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// <https://github.com/joyent/node/blob/master/lib/util.js#L22>:
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var inspect = util.inspect;
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var formatRegExp = /%[sdj%]/g;
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format = function format(f) {
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if (typeof f !== 'string') {
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var objects = [];
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for (var i = 0; i < arguments.length; i++) {
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objects.push(inspect(arguments[i]));
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}
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return objects.join(' ');
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}
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var i = 1;
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var args = arguments;
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var len = args.length;
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var str = String(f).replace(formatRegExp, function(x) {
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if (i >= len) return x;
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switch (x) {
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case '%s': return String(args[i++]);
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case '%d': return Number(args[i++]);
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case '%j': return JSON.stringify(args[i++]);
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case '%%': return '%';
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default:
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return x;
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}
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});
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for (var x = args[i]; i < len; x = args[++i]) {
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if (x === null || typeof x !== 'object') {
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str += ' ' + x;
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} else {
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str += ' ' + inspect(x);
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}
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}
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return str;
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};
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}
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function indent(s) {
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return ' ' + s.split(/\r?\n/).join('\n ')
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}
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function objCopy(obj) {
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if (obj === null) {
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return null;
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} else if (Array.isArray(obj)) {
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return obj.slice();
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} else {
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var copy = {};
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Object.keys(obj).forEach(function (k) {
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copy[k] = obj[k];
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});
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return copy;
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}
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}
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function printHelp() {
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util.puts("Usage:");
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util.puts(" cat some-json-log-file.log | bunyan [OPTIONS]");
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util.puts("");
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util.puts("Pipe in your JSON log file content (e.g. bunyan logs) for nicer ");
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util.puts("output");
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util.puts("");
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util.puts("Options:");
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util.puts(" -h, --help print this help info and exit");
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util.puts(" --version print version of this command and exit");
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util.puts("");
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util.puts(" --color Colorize output. Defaults to try if output");
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util.puts(" stream is a TTY.");
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util.puts(" --no-color Force no coloring (e.g. terminal doesn't support it)");
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util.puts(" -o, --output MODE");
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util.puts(" Specify an output mode/format. One of");
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util.puts(" paul: (the default) pretty")
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util.puts(" json: JSON output, 2-space indent");
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util.puts(" json-N: JSON output, N-space indent, e.g. 'json-4'");
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util.puts(" inspect: node.js `util.inspect` output");
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util.puts(" -j shortcut for `-o json`");
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util.puts("");
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util.puts("See <https://github.com/trentm/json> for more complete docs.");
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}
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/**
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* Parse the command-line options and arguments into an object.
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*
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* {
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* 'args': [...] // arguments
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* 'help': true, // true if '-h' option given
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* // etc.
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* }
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*
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* @return {Object} The parsed options. `.args` is the argument list.
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* @throws {Error} If there is an error parsing argv.
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*/
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function parseArgv(argv) {
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var parsed = {
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args: [],
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help: false,
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color: process.stdout.isTTY,
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outputMode: OM_PAUL,
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jsonIndent: 2
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};
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// Turn '-iH' into '-i -H', except for argument-accepting options.
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var args = argv.slice(2); // drop ['node', 'scriptname']
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var newArgs = [];
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var optTakesArg = {'d': true, 'o': true};
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for (var i = 0; i < args.length; i++) {
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if (args[i].charAt(0) === "-" && args[i].charAt(1) !== '-' && args[i].length > 2) {
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var splitOpts = args[i].slice(1).split("");
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for (var j = 0; j < splitOpts.length; j++) {
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newArgs.push('-' + splitOpts[j])
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if (optTakesArg[splitOpts[j]]) {
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var optArg = splitOpts.slice(j+1).join("");
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if (optArg.length) {
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newArgs.push(optArg);
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}
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break;
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}
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}
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} else {
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newArgs.push(args[i]);
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}
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}
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args = newArgs;
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endOfOptions = false;
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while (args.length > 0) {
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var arg = args.shift();
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switch(arg) {
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case "--":
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endOfOptions = true;
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break;
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case "-h": // display help and exit
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case "--help":
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parsed.help = true;
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break;
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case "--version":
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parsed.version = true;
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break;
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case "--color":
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parsed.color = true;
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break;
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case "--no-color":
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parsed.color = false;
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break;
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case "-o":
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case "--output":
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var name = args.shift();
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var idx = name.lastIndexOf('-');
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if (idx !== -1) {
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var indent = Number(name.slice(idx+1));
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if (! isNaN(indent)) {
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parsed.jsonIndent = indent;
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name = name.slice(0, idx);
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}
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}
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parsed.outputMode = OM_FROM_NAME[name];
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if (parsed.outputMode === undefined) {
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throw new Error("unknown output mode: '"+name+"'");
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}
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break;
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case "-j": // output with JSON.stringify
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parsed.outputMode = OM_JSON;
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break;
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default: // arguments
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if (!endOfOptions && arg.length > 0 && arg[0] === '-') {
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throw new Error("unknown option '"+arg+"'");
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}
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parsed.args.push(arg);
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break;
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}
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}
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//TODO: '--' handling and error on a first arg that looks like an option.
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return parsed;
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}
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function isInteger(s) {
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return (s.search(/^-?[0-9]+$/) == 0);
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}
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// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
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// Suggested colors (some are unreadable in common cases):
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// - Good: cyan, yellow (limited use), grey, bold, green, magenta, red
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// - Bad: blue (not visible on cmd.exe)
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var colors = {
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'bold' : [1, 22],
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'italic' : [3, 23],
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'underline' : [4, 24],
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'inverse' : [7, 27],
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'white' : [37, 39],
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'grey' : [90, 39],
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'black' : [30, 39],
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'blue' : [34, 39],
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'cyan' : [36, 39],
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'green' : [32, 39],
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'magenta' : [35, 39],
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'red' : [31, 39],
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'yellow' : [33, 39]
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};
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function stylizeWithColor(str, color) {
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var codes = colors[color];
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if (codes) {
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return '\033[' + codes[0] + 'm' + str +
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'\033[' + codes[1] + 'm';
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} else {
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return str;
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}
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}
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function stylizeWithoutColor(str, color) {
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return str;
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}
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/**
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* Print out a single result, considering input options.
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*/
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function handleLogLine(line, opts, stylize) {
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// Handle non-JSON lines.
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var rec;
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if (!line) {
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return emit(line + '\n');
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} else if (line[0] !== '{') {
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return emit(line + '\n'); // not JSON
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} else {
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try {
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rec = JSON.parse(line);
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} catch(e) {
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return emit(line + '\n');
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}
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}
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switch (opts.outputMode) {
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case OM_PAUL:
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// [time] LEVEL: name[/component]/pid on hostname (src): msg* (extras...)
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// msg*
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// --
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// long and multi-line extras
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// ...
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// If 'msg' is single-line, then it goes in the top line.
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// If 'req', show the request.
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// If 'res', show the response.
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// If 'err' and 'err.stack' then show that.
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delete rec.v;
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var time = stylize('[' + rec.time + ']', 'XXX');
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delete rec.time;
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var nameStr = rec.name;
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delete rec.name;
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if (rec.component) {
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nameStr += '/' + rec.component;
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}
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delete rec.component;
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nameStr += '/' + rec.pid;
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delete rec.pid;
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var level = (upperPaddedNameFromLevel[rec.level] || "LVL" + rec.level);
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if (opts.color) {
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var colorFromLevel = {
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10: 'grey', // TRACE
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20: 'grey', // DEBUG
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30: 'cyan', // INFO
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40: 'magenta', // WARN
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50: 'red', // ERROR
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60: 'inverse', // FATAL
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}
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level = stylize(level, colorFromLevel[rec.level])
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}
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delete rec.level;
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var src = "";
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if (rec.src && rec.src.file) {
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var s = rec.src;
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if (s.func) {
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src = format(" (%s:%d in %s)", s.file, s.line, s.func);
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} else {
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src = format(" (%s:%d)", s.file, s.line);
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}
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}
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delete rec.src;
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var hostname = rec.hostname;
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delete rec.hostname;
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var extras = [];
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var details = [];
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if (rec.req_id) {
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extras.push("req_id=" + rec.req_id);
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}
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delete rec.req_id;
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if (rec.latency) {
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extras.push(rec.latency + "ms");
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}
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delete rec.latency;
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var onelineMsg;
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if (rec.msg.indexOf('\n') !== -1) {
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onelineMsg = '';
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details.push(indent(stylize(rec.msg, 'cyan')));
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} else {
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onelineMsg = ' ' + stylize(rec.msg, 'cyan');
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}
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delete rec.msg;
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if (rec.req) {
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var headers = rec.req.headers;
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details.push(indent(format("%s %s HTTP/1.1\n%s", rec.req.method,
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rec.req.url,
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Object.keys(headers).map(
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function (h) { return h + ': ' + headers[h]}).join('\n'))));
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}
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delete rec.req;
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if (rec.client_req) {
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var headers = rec.client_req.headers;
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var hostHeaderLine = '';
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if (rec.client_req.address) {
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hostHeaderLine = 'Host: ' + rec.client_req.address;
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if (rec.client_req.port)
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hostHeaderLine += ':' + rec.client_req.port;
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hostHeaderLine += '\n';
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}
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details.push(indent(format("%s %s HTTP/1.1\n%s%s", rec.client_req.method,
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rec.client_req.url,
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hostHeaderLine,
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Object.keys(headers).map(
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function (h) { return h + ': ' + headers[h]}).join('\n'))));
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}
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delete rec.client_req;
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if (rec.res) {
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var s = '';
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if (rec.res.header) {
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s += rec.res.header.trimRight()
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} else if (rec.res.headers) {
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if (rec.res.statusCode) {
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s += format("HTTP/1.1 %s %s\n", rec.res.statusCode,
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http.STATUS_CODES[rec.res.statusCode]);
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}
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var headers = rec.res.headers;
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s += Object.keys(headers).map(
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function (h) { return h + ': ' + headers[h]}).join('\n');
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}
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if (s) {
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details.push(indent(s));
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}
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}
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delete rec.res;
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if (rec.err && rec.err.stack) {
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details.push(indent(rec.err.stack))
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}
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delete rec.err;
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var leftover = Object.keys(rec);
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for (var i = 0; i < leftover.length; i++) {
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var key = leftover[i];
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var value = rec[key];
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var type = typeof(value);
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var stringified = false;
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if (typeof(value) !== 'string') {
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value = JSON.stringify(value, null, 2);
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stringified = true;
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}
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if (value.indexOf('\n') !== -1 || value.length > 50) {
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details.push(indent(key + ': ' + value))
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} else if (!stringified && (value.indexOf(' ') != -1 ||
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value.length === 0)) {
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extras.push(key + '=' + JSON.stringify(value))
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} else {
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extras.push(key + '=' + value)
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}
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}
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extras = stylize(
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(extras.length ? ' (' + extras.join(', ') + ')' : ''), 'grey');
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details = stylize(
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(details.length ? details.join('\n --\n') + '\n' : ''), 'grey');
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emit(format("%s %s: %s on %s%s:%s%s\n%s",
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time,
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level,
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nameStr,
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hostname || "<no-hostname>",
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src,
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onelineMsg,
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extras,
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details));
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break;
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case OM_INSPECT:
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emit(util.inspect(rec, false, Infinity, true) + '\n');
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break;
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case OM_JSON:
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emit(JSON.stringify(rec, null, opts.jsonIndent) + '\n');
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break;
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case OM_SIMPLE:
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// <http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/SimpleLayout.html>
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emit(format("%s - %s", upperNameFromLevel[rec.level] || "LVL" + rec.level,
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rec.msg));
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break;
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default:
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throw new Error("unknown output mode: "+opts.outputMode);
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}
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}
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var stdoutFlushed = true;
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function emit(s) {
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// TODO:PERF If this is try/catch is too slow (too granular): move up to
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// mainline and be sure to only catch this particular error.
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try {
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stdoutFlushed = process.stdout.write(s);
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} catch (e) {
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// Handle any exceptions in stdout writing in the "error" event above.
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}
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}
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process.stdout.on("error", function (err) {
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if (err.code === "EPIPE") {
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// Pass. See <https://github.com/trentm/json/issues/9>.
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} else {
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warn(err)
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drainStdoutAndExit(1);
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}
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});
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/**
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* A hacked up version of "process.exit" that will first drain stdout
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* before exiting. *WARNING: This doesn't stop event processing.* IOW,
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* callers have to be careful that code following this call isn't
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* accidentally executed.
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*
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* In node v0.6 "process.stdout and process.stderr are blocking when they
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* refer to regular files or TTY file descriptors." However, this hack might
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* still be necessary in a shell pipeline.
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*/
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function drainStdoutAndExit(code) {
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process.stdout.on('drain', function () {
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process.exit(code);
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});
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if (stdoutFlushed) {
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process.exit(code);
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}
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}
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//---- mainline
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function main(argv) {
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var opts;
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try {
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opts = parseArgv(argv);
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} catch (e) {
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warn("json: error: %s", e.message)
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return drainStdoutAndExit(1);
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}
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//warn(opts);
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if (opts.help) {
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printHelp();
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return;
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}
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if (opts.version) {
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|
util.puts("bunyan " + getVersion());
|
|
return;
|
|
}
|
|
var stylize = (opts.color ? stylizeWithColor : stylizeWithoutColor);
|
|
|
|
var leftover = ""; // Left-over partial line from last chunk.
|
|
var stdin = process.openStdin();
|
|
stdin.setEncoding('utf8');
|
|
stdin.on('data', function (chunk) {
|
|
var lines = chunk.split(/\r\n|\n/);
|
|
var length = lines.length;
|
|
if (length === 1) {
|
|
leftover += lines[0];
|
|
return;
|
|
}
|
|
|
|
if (length > 1) {
|
|
handleLogLine(leftover + lines[0], opts, stylize);
|
|
}
|
|
leftover = lines.pop();
|
|
length -= 1;
|
|
for (var i=1; i < length; i++) {
|
|
handleLogLine(lines[i], opts, stylize);
|
|
}
|
|
});
|
|
|
|
stdin.on('end', function () {
|
|
if (leftover) {
|
|
handleLogLine(leftover, opts, stylize);
|
|
leftover = '';
|
|
}
|
|
});
|
|
}
|
|
|
|
if (require.main === module) {
|
|
// HACK guard for <https://github.com/trentm/json/issues/24>.
|
|
// We override the `process.stdout.end` guard that core node.js puts in
|
|
// place. The real fix is that `.end()` shouldn't be called on stdout
|
|
// in node core. Hopefully node v0.6.9 will fix that. Only guard
|
|
// for v0.6.0..v0.6.8.
|
|
var nodeVer = process.versions.node.split('.').map(Number);
|
|
if ([0,6,0] <= nodeVer && nodeVer <= [0,6,8]) {
|
|
var stdout = process.stdout;
|
|
stdout.end = stdout.destroy = stdout.destroySoon = function() {
|
|
/* pass */
|
|
};
|
|
}
|
|
|
|
main(process.argv);
|
|
}
|