All files / lib/internal/util debuglog.js

100% Statements 115/115
100% Branches 30/30
92.85% Functions 13/14
100% Lines 115/115

Press n or j to go to the next uncovered block, b, p or k for the previous block.

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 11622x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 5520x 5520x 5520x 45x 45x 45x 45x 45x 45x 5520x 5475x 5475x 5520x 22x 22x 22x 33x 33x 3x 3x 3x 3x 3x 33x 22x 22x 22x 21379x 21379x 14112x 33x 33x 33x 139x 139x 139x 139x 33x 14084x 14079x 14079x 14112x 21379x 21379x 22x 22x 22x 22x 22x 56910x 56910x 21417x 21417x 21417x 56910x 21379x 21379x 21379x 21379x 21379x 21379x 21379x 21379x 21379x 21379x 21379x 56910x 56910x 56910x 38x 38x 38x 56910x 56910x 29317x 29317x 29317x 29317x 29317x 56910x 56910x 56910x 38x 56910x 56910x 56910x 56910x 56910x 56910x 22x 22x 22x 22x 22x  
'use strict';
 
const {
  ObjectCreate,
  ObjectDefineProperty,
  RegExp,
  RegExpPrototypeExec,
  SafeArrayIterator,
  StringPrototypeToLowerCase,
  StringPrototypeToUpperCase,
} = primordials;
 
const { inspect, format, formatWithOptions } = require('internal/util/inspect');
 
// `debugImpls` and `testEnabled` are deliberately not initialized so any call
// to `debuglog()` before `initializeDebugEnv()` is called will throw.
let debugImpls;
let testEnabled;
 
 
// `debugEnv` is initial value of process.env.NODE_DEBUG
function initializeDebugEnv(debugEnv) {
  debugImpls = ObjectCreate(null);
  if (debugEnv) {
    // This is run before any user code, it's OK not to use primordials.
    debugEnv = debugEnv.replace(/[|\\{}()[\]^$+?.]/g, '\\$&')
      .replaceAll('*', '.*')
      .replaceAll(',', '$|^');
    const debugEnvRegex = new RegExp(`^${debugEnv}$`, 'i');
    testEnabled = (str) => RegExpPrototypeExec(debugEnvRegex, str) !== null;
  } else {
    testEnabled = () => false;
  }
}
 
// Emits warning when user sets
// NODE_DEBUG=http or NODE_DEBUG=http2.
function emitWarningIfNeeded(set) {
  if ('HTTP' === set || 'HTTP2' === set) {
    process.emitWarning('Setting the NODE_DEBUG environment variable ' +
      'to \'' + StringPrototypeToLowerCase(set) + '\' can expose sensitive ' +
      'data (such as passwords, tokens and authentication headers) ' +
      'in the resulting log.');
  }
}
 
const noop = () => {};
 
function debuglogImpl(enabled, set) {
  if (debugImpls[set] === undefined) {
    if (enabled) {
      const pid = process.pid;
      emitWarningIfNeeded(set);
      debugImpls[set] = function debug(...args) {
        const colors = process.stderr.hasColors && process.stderr.hasColors();
        const msg = formatWithOptions({ colors }, ...args);
        const coloredPID = inspect(pid, { colors });
        process.stderr.write(format('%s %s: %s\n', set, coloredPID, msg));
      };
    } else {
      debugImpls[set] = noop;
    }
  }
  return debugImpls[set];
}
 
// debuglogImpl depends on process.pid and process.env.NODE_DEBUG,
// so it needs to be called lazily in top scopes of internal modules
// that may be loaded before these run time states are allowed to
// be accessed.
function debuglog(set, cb) {
  function init() {
    set = StringPrototypeToUpperCase(set);
    enabled = testEnabled(set);
  }
  let debug = (...args) => {
    init();
    // Only invokes debuglogImpl() when the debug function is
    // called for the first time.
    debug = debuglogImpl(enabled, set);
    if (typeof cb === 'function')
      cb(debug);
    switch (args.length) {
      case 1: return debug(args[0]);
      case 2: return debug(args[0], args[1]);
      default: return debug(...new SafeArrayIterator(args));
    }
  };
  let enabled;
  let test = () => {
    init();
    test = () => enabled;
    return enabled;
  };
  const logger = (...args) => {
    switch (args.length) {
      case 1: return debug(args[0]);
      case 2: return debug(args[0], args[1]);
      default: return debug(...new SafeArrayIterator(args));
    }
  };
  ObjectDefineProperty(logger, 'enabled', {
    get() {
      return test();
    },
    configurable: true,
    enumerable: true
  });
  return logger;
}
 
module.exports = {
  debuglog,
  initializeDebugEnv
};