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8 changed files with 4 additions and 534 deletions

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@ -1,5 +1,4 @@
const API = require('./lib/api.js');
const stderrUtils = require('./lib/stderrUtils');
/*
* For convenience purposes, we provide an already instanciated API; so that
@ -12,40 +11,4 @@ module.exports = {
Logger: werelogs.Logger,
configure: werelogs.reconfigure.bind(werelogs),
Werelogs: API,
/**
* Timestamp logs going to stderr
*
* @example <caption>Simplest usage</caption>
* ```
* const { stderrUtils } = require('werelogs');
* stderrUtils.catchAndTimestampStderr();
* ```
*
* @example <caption>Manage process exit</caption>
* ```
* const { stderrUtils } = require('werelogs');
* // set exitCode to null to keep process running on uncaughtException
* stderrUtils.catchAndTimestampStderr(undefined, null);
* // application init
* process.on('uncaughtException', (err) => {
* // custom handling, close connections, files
* this.worker.kill(); // or process.exit(1);
* });
* // Note you could use prependListener to execute your callback first
* // and then let stderrUtils exit the process.
* ```
*
* @example <caption>Custom listener</caption>
* ```
* const { stderrUtils } = require('werelogs');
* stderrUtils.catchAndTimestampWarning();
* // application init
* process.on('uncaughtException', (err, origin) => {
* stderrUtils.printErrorWithTimestamp(err, origin);
* // close and stop everything
* process.exit(1);
* });
* ```
*/
stderrUtils,
};

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@ -1,106 +0,0 @@
/**
* @returns {string} a timestamp in ISO format YYYY-MM-DDThh:mm:ss.sssZ
*/
const defaultTimestamp = () => new Date().toISOString();
/**
* Prints on stderr a timestamp, the origin and the error
*
* If no other instructions are needed on uncaughtException,
* consider using `catchAndTimestampStderr` directly.
*
* @example
* process.on('uncaughtException', (err, origin) => {
* printErrorWithTimestamp(err, origin);
* // server.close();
* // file.close();
* process.nextTick(() => process.exit(1));
* });
* // Don't forget to timestamp warning
* catchAndTimestampWarning();
* @param {Error} err see process event uncaughtException
* @param {uncaughtException|unhandledRejection} origin see process event
* @param {string} [date=`defaultTimestamp()`] Date to print
* @returns {boolean} see process.stderr.write
*/
function printErrorWithTimestamp(
err, origin, date = defaultTimestamp(),
) {
return process.stderr.write(`${date}: ${origin}:\n${err.stack}\n`);
}
/**
* Prefer using `catchAndTimestampStderr` instead of this function.
*
* Adds listener for uncaughtException to print with timestamp.
*
* If you want to manage the end of the process, you can set exitCode to null.
* Or use `printErrorWithTimestamp` in your own uncaughtException listener.
*
* @param {Function} [dateFct=`defaultTimestamp`] Fct returning a formatted date
* @param {*} [exitCode=1] On uncaughtException, if not null, `process.exit`
* will be called with this value
* @returns {undefined}
*/
function catchAndTimestampUncaughtException(
dateFct = defaultTimestamp, exitCode = 1,
) {
process.on('uncaughtException', (err, origin) => {
printErrorWithTimestamp(err, origin, dateFct());
if (exitCode !== null) {
process.nextTick(() => process.exit(exitCode));
}
});
}
/**
* Forces the use of `--trace-warnings` and adds a date in warning.detail
* The warning will be printed by the default `onWarning`
*
* @param {string} [dateFct=`defaultTimestamp`] Fct returning a formatted date
* @returns {undefined}
*/
function catchAndTimestampWarning(dateFct = defaultTimestamp) {
process.traceProcessWarnings = true;
// must be executed first, before the default `onWarning`
process.prependListener('warning', warning => {
if (warning.detail) {
// eslint-disable-next-line no-param-reassign
warning.detail += `\nAbove Warning Date: ${dateFct()}`;
} else {
// eslint-disable-next-line no-param-reassign
warning.detail = `Above Warning Date: ${dateFct()}`;
}
});
}
/**
* Adds listener for uncaughtException and warning to print them with timestamp.
*
* If you want to manage the end of the process, you can set exitCode to null.
* Or use `printErrorWithTimestamp` in your own uncaughtException listener.
*
* @example
* const { stderrUtils } = require('werelogs');
* // first instruction in your index.js or entrypoint
* stderrUtils.catchAndTimestampStderr();
*
* @param {Function} [dateFct=`defaultTimestamp`] Fct returning a formatted date
* @param {*} [exitCode=1] On uncaughtException, if not null, `process.exit`
* will be called with this value
* @returns {undefined}
*/
function catchAndTimestampStderr(
dateFct = defaultTimestamp, exitCode = 1,
) {
catchAndTimestampUncaughtException(dateFct, exitCode);
catchAndTimestampWarning(dateFct);
}
module.exports = {
defaultTimestamp,
printErrorWithTimestamp,
catchAndTimestampUncaughtException,
catchAndTimestampWarning,
catchAndTimestampStderr,
};

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@ -3,7 +3,7 @@
"engines": {
"node": ">=10"
},
"version": "8.1.5",
"version": "8.1.4",
"description": "An efficient raw JSON logging library aimed at micro-services architectures.",
"main": "index.js",
"scripts": {

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@ -1,17 +0,0 @@
#!/usr/bin/env node
// Convert string args into primitive value
const fromStr = (str, primitive) => (str === `${primitive}` ? primitive : str);
const date = fromStr(process.argv[2], undefined);
const exitCode = fromStr(fromStr(process.argv[3], null), undefined);
const { stderrUtils } = require('../../../../index');
stderrUtils.catchAndTimestampStderr(
date ? () => date : undefined,
exitCode,
);
process.emitWarning('TestWarningMessage');
// This will print warning after printing error before exit
throw new Error('TestingError');

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@ -1,23 +0,0 @@
#!/usr/bin/env node
// Convert string args into primitive value
const fromStr = (str, primitive) => (str === `${primitive}` ? primitive : str);
const date = fromStr(process.argv[2], undefined);
const exitCode = fromStr(fromStr(process.argv[3], null), undefined);
const promise = fromStr(process.argv[4], true);
const { stderrUtils } = require('../../../../index');
stderrUtils.catchAndTimestampUncaughtException(
date ? () => date : undefined,
exitCode,
);
// Executed if process does not exit, process is in undefined behavior (bad)
// eslint-disable-next-line no-console
setTimeout(() => console.log('EXECUTED AFTER UNCAUGHT EXCEPTION'), 1);
if (promise === true) {
Promise.reject();
} else {
throw new Error('TestingError');
}

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@ -1,38 +0,0 @@
#!/usr/bin/env node
// Convert string args into primitive value
const fromStr = (str, primitive) => (str === `${primitive}` ? primitive : str);
const date = fromStr(process.argv[2], undefined);
const name = fromStr(process.argv[3], undefined);
const code = fromStr(process.argv[4], undefined);
const detail = fromStr(process.argv[5], undefined);
const { stderrUtils } = require('../../../../index');
stderrUtils.catchAndTimestampWarning(
date ? () => date : undefined,
);
const warning = new Error('TestWarningMessage');
if (name) warning.name = name;
if (code) warning.code = code;
if (detail) warning.detail = detail;
process.emitWarning(warning);
/*
Examples:
(node:203831) Error: TestWarningMessage
at Object.<anonymous> (catchWarning.js:15:17)
...
at node:internal/main/run_main_module:22:47
Above Warning Date: 2024-06-26T16:32:55.505Z
(node:205151) [TEST01] CUSTOM: TestWarningMessage
at Object.<anonymous> (catchWarning.js:15:17)
...
at node:internal/main/run_main_module:22:47
Some additional detail
Above Warning Date: Tue, 31 Dec 2024 10:20:30 GMT
*/

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@ -1,309 +0,0 @@
const assert = require('assert');
const { execFile } = require('child_process');
const stderrUtils = require('../../lib/stderrUtils');
/** Simple regex for ISO YYYY-MM-DDThh:mm:ss.sssZ */
// eslint-disable-next-line max-len
const defaultDateRegex = /\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d\.\d+(?:[+-][0-2]\d:[0-5]\d|Z)/;
// eslint-disable-next-line valid-jsdoc
/** another format: Tue, 31 Dec 2024 10:20:30 GMT */
const customDate = () => new Date('2024-12-31T10:20:30.444Z').toUTCString();
describe('stderrUtils', () => {
const errStackRegex = /Error: TestingError\n(?:.*\sat\s.*\n)+/;
describe('defaultTimestamp', () => {
it('should match ISO format', () => {
assert.match(stderrUtils.defaultTimestamp(), defaultDateRegex);
});
});
describe('printErrorWithTimestamp', () => {
let stderrText;
const originalStderrWrite = process.stderr.write;
const mockedStderrWrite = text => { stderrText = text; return true; };
const err = new Error('TestingError');
const origin = 'uncaughtException';
beforeEach(() => {
stderrText = undefined;
process.stderr.write = mockedStderrWrite;
});
afterEach(() => {
process.stderr.write = originalStderrWrite;
stderrText = undefined;
});
it(
'should write to stderr with current date, origin and stacktrace',
() => {
const written = stderrUtils
.printErrorWithTimestamp(err, origin);
assert.strictEqual(written, true);
const [firstLine, errStack] = stderrText.split(':\n');
const [errDate, errOrigin] = firstLine.split(': ');
assert.match(errDate, defaultDateRegex);
assert.strictEqual(errOrigin, origin);
assert.strictEqual(errStack, `${err.stack}\n`);
},
);
it(
'should write to stderr with custom date, origin and stacktrace',
() => {
const written = stderrUtils
.printErrorWithTimestamp(err, origin, customDate());
assert.strictEqual(written, true);
const [firstLine, errStack] = stderrText.split(':\n');
const [errDate, errOrigin] = firstLine.split(': ');
assert.strictEqual(errDate, customDate());
assert.strictEqual(errOrigin, origin);
assert.strictEqual(errStack, `${err.stack}\n`);
},
);
});
const execOptions = {
cwd: __dirname,
// Subprocess should always stop alone
// But just in case, kill subprocess after 500ms.
// Leave enough time for `nyc` that runs slower.
timeout: 500,
};
// Execute in another process to notice the process exit
// Therefore, looks more like a functional test
const timeoutHint = (ms, retries) =>
`Test fixture process timed out after ${ms}ms with ${retries} retries.\n` +
'Due to nyc coverage first run slowing down process.\nIncrease execOptions.timeout to fix';
describe('catchAndTimestampUncaughtException', () => {
[
{ desc: 'with default date' },
{ desc: 'with custom date', date: customDate() },
{ desc: 'with custom exitCode 42', exitCode: 42 },
{ desc: 'without exit on uncaught exception', exitCode: null },
{ desc: 'for unhandled promise', promise: true },
].forEach(({
desc, date, exitCode, promise,
}) => describe(desc, () => {
/** for before all hook that doesn't support this.retries */
let retries = 4;
let err;
let stdout;
let stderr;
let errStack;
let errDate;
let errOrigin;
before('run process catchUncaughtException', function beforeAllHook(done) {
execFile(
'./fixtures/stderrUtils/catchUncaughtException.js',
[`${date}`, `${exitCode}`, `${promise}`],
execOptions,
(subErr, subStdout, subStderr) => {
if (subErr?.killed) {
retries--;
if (retries <= 0) {
assert.fail(timeoutHint(execOptions.timeout, retries));
}
execOptions.timeout *= 2;
return beforeAllHook(done);
}
err = subErr;
stdout = subStdout;
stderr = subStderr;
let firstLine;
[firstLine, errStack] = stderr.split(':\n');
[errDate, errOrigin] = firstLine.split(': ');
done();
},
);
});
if (exitCode === null) {
it('should not be an error (or timeout)',
() => assert.ifError(err));
it('should have stdout (printed after uncaught exception)',
() => assert.match(stdout,
/^.*EXECUTED AFTER UNCAUGHT EXCEPTION(?:.|\n)*$/));
} else {
it('should be an error',
() => assert.ok(err));
it(`should have exitCode ${exitCode || 1}`,
() => assert.strictEqual(err.code, exitCode || 1));
it('should have empty stdout',
() => assert.strictEqual(stdout, ''));
}
it('should have stderr',
() => assert.ok(stderr));
it('should have date in stderr first line',
() => (date
? assert.strictEqual(errDate, date)
: assert.match(errDate, defaultDateRegex)));
it('should have origin in stderr first line',
() => (promise === true
? assert.strictEqual(errOrigin, 'unhandledRejection')
: assert.strictEqual(errOrigin, 'uncaughtException')));
if (!promise) {
it('should have stack trace on stderr',
() => assert.match(errStack, errStackRegex));
}
}));
});
describe('catchAndTimestampWarning (also tests node onWarning)', () => {
[
{ desc: 'with default date' },
{ desc: 'with custom date', date: customDate() },
{ desc: 'with deprecation warning', name: 'DeprecationWarning' },
{
desc: 'with custom warning',
name: 'CUSTOM',
code: 'TEST01',
detail: 'Some additional detail',
},
].forEach(({
desc, date, name, code, detail,
}) => describe(desc, () => {
/** for before all hook that doesn't support this.retries */
let retries = 4;
let err;
let stdout;
let stderr;
before('run process catchWarning', function beforeAllHook(done) {
execFile(
'./fixtures/stderrUtils/catchWarning.js',
[`${date}`, `${name}`, `${code}`, `${detail}`],
execOptions,
(subErr, subStdout, subStderr) => {
if (subErr?.killed) {
retries--;
if (retries <= 0) {
assert.fail(timeoutHint(execOptions.timeout, retries));
}
execOptions.timeout *= 2;
return beforeAllHook(done);
}
err = subErr;
stdout = subStdout;
stderr = subStderr;
done();
},
);
});
it('should not be an error (or timeout)',
() => assert.ifError(err));
it('should have empty stdout',
() => assert.strictEqual(stdout, ''));
it('should have stderr',
() => assert.ok(stderr));
it('should have message on stderr first line, then stack trace',
() => assert.match(stderr,
/^.*TestWarningMessage\n(?:\s+at\s.*\n)+/));
if (code) {
it('should have code on stderr first line',
() => assert.match(stderr, new RegExp(`^.*[${code}]`)));
}
if (name) {
it('should have name on stderr first line',
() => assert.match(stderr, new RegExp(`^.*${name}:`)));
}
if (detail) {
it('should have detail on stderr',
() => assert.match(stderr, new RegExp(`.*${detail}.*`)));
}
it(`should have ${date ? 'custom' : 'default'} date on stderr`,
() => assert.match(stderr, new RegExp(
`\nAbove Warning Date: ${
date || defaultDateRegex.source}\n`,
)));
}));
});
describe('catchAndTimestampStderr', () => {
[
{ desc: 'with default date' },
{ desc: 'with custom date', date: customDate() },
{ desc: 'with exit code', exitCode: 42 },
].forEach(({
desc, date, exitCode,
}) => describe(desc, () => {
/** for before all hook that doesn't support this.retries */
let retries = 4;
let err;
let stdout;
let stderr;
before('run process catchStderr', function beforeAllHook(done) {
execFile(
'./fixtures/stderrUtils/catchStderr.js',
[`${date}`, `${exitCode}`],
execOptions,
(subErr, subStdout, subStderr) => {
if (subErr?.killed) {
retries--;
if (retries <= 0) {
assert.fail(timeoutHint(execOptions.timeout, retries));
}
execOptions.timeout *= 2;
return beforeAllHook(done);
}
err = subErr;
stdout = subStdout;
stderr = subStderr;
done();
},
);
});
it('should be an error',
() => assert.ok(err));
it(`should have exitCode ${exitCode || 1}`,
() => assert.strictEqual(err.code, exitCode || 1));
it('should have empty stdout',
() => assert.strictEqual(stdout, ''));
it('should have stderr',
() => assert.ok(stderr));
// 2024-06-26T15:04:55.364Z: uncaughtException:
// Error: TestingError
// at Object.<anonymous> (catchStderr.js:16:7)
// at node:internal/main/run_main_module:22:47
it('should have error date, origin and stacktrace in stderr',
() => assert.match(stderr,
new RegExp(`${date || defaultDateRegex.source
}: uncaughtException:\n${errStackRegex.source}`)));
// (node:171245) Warning: TestWarningMessage
// at Object.<anonymous> (catchStderr.js:14:9)
// at node:internal/main/run_main_module:22:47
// Above Warning Date: 2024-06-26T15:04:55.365Z
it('should have warning with stacktrace in stderr', () => {
const trace = 'Warning: TestWarningMessage\n(?:\\s+at\\s.*\n)+';
const detail = `(?:.|\n)*?(?<=\n)Above Warning Date: ${
date || defaultDateRegex.source}\n`;
assert.match(stderr,
new RegExp(`${trace}${detail}`));
});
}));
});
});

View File

@ -618,9 +618,9 @@ camelcase@^6.0.0:
integrity sha512-c7wVvbw3f37nuobQNtgsgG9POC9qMbNuMQmTCqZv23b6MIz0fcYpBiOlv9gEN/hdLdnZTDQhg6e9Dq5M1vKvfg==
caniuse-lite@^1.0.30001259:
version "1.0.30001637"
resolved "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001637.tgz"
integrity sha512-1x0qRI1mD1o9e+7mBI7XtzFAP4XszbHaVWsMiGbSPLYekKTJF7K+FNk6AsXH4sUpc+qrsI3pVgf1Jdl/uGkuSQ==
version "1.0.30001261"
resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001261.tgz#96d89813c076ea061209a4e040d8dcf0c66a1d01"
integrity sha512-vM8D9Uvp7bHIN0fZ2KQ4wnmYFpJo/Etb4Vwsuc+ka0tfGDHvOPrFm6S/7CCNLSOkAUjenT2HnUPESdOIL91FaA==
catharsis@^0.8.11:
version "0.8.11"