uptime-kuma/src/util.ts
Matthew Nickson a927f5cd15
Fixed typos + improved clarity and detail of some JSDoc
Apply suggestions from code review

Co-authored-by: Nelson Chan <chakflying@hotmail.com>
2022-06-02 16:40:56 +01:00

339 lines
8.8 KiB
TypeScript

// Common Util for frontend and backend
//
// DOT NOT MODIFY util.js!
// Need to run "tsc" to compile if there are any changes.
//
// Backend uses the compiled file util.js
// Frontend uses util.ts
import * as _dayjs from "dayjs";
const dayjs = _dayjs;
export const isDev = process.env.NODE_ENV === "development";
export const appName = "Uptime Kuma";
export const DOWN = 0;
export const UP = 1;
export const PENDING = 2;
export const STATUS_PAGE_ALL_DOWN = 0;
export const STATUS_PAGE_ALL_UP = 1;
export const STATUS_PAGE_PARTIAL_DOWN = 2;
/** Flip the status of s */
export function flipStatus(s: number) {
if (s === UP) {
return DOWN;
}
if (s === DOWN) {
return UP;
}
return s;
}
/**
* Delays for specified number of seconds
* @param ms Number of milliseconds to sleep for
*/
export function sleep(ms: number) {
return new Promise(resolve => setTimeout(resolve, ms));
}
/**
* PHP's ucfirst
* @param str
*/
export function ucfirst(str: string) {
if (!str) {
return str;
}
const firstLetter = str.substr(0, 1);
return firstLetter.toUpperCase() + str.substr(1);
}
/**
* @deprecated Use log.debug
* @since https://github.com/louislam/uptime-kuma/pull/910
* @param msg
*/
export function debug(msg: any) {
log.log("", msg, "debug");
}
class Logger {
/**
* UPTIME_KUMA_HIDE_LOG=debug_monitor,info_monitor
*
* Example:
* [
* "debug_monitor", // Hide all logs that level is debug and the module is monitor
* "info_monitor",
* ]
*/
hideLog : any = {
info: [],
warn: [],
error: [],
debug: [],
};
constructor() {
if (typeof process !== "undefined" && process.env.UPTIME_KUMA_HIDE_LOG) {
let list = process.env.UPTIME_KUMA_HIDE_LOG.split(",").map(v => v.toLowerCase());
for (let pair of list) {
// split first "_" only
let values = pair.split(/_(.*)/s);
if (values.length >= 2) {
this.hideLog[values[0]].push(values[1]);
}
}
this.debug("server", "UPTIME_KUMA_HIDE_LOG is set");
this.debug("server", this.hideLog);
}
}
/**
* Write a message to the log
* @param module The module the log comes from
* @param msg Message to write
* @param level Log level. One of INFO, WARN, ERROR, DEBUG or can be customized.
*/
log(module: string, msg: any, level: string) {
if (this.hideLog[level] && this.hideLog[level].includes(module)) {
return;
}
module = module.toUpperCase();
level = level.toUpperCase();
const now = new Date().toISOString();
const formattedMessage = (typeof msg === "string") ? `${now} [${module}] ${level}: ${msg}` : msg;
if (level === "INFO") {
console.info(formattedMessage);
} else if (level === "WARN") {
console.warn(formattedMessage);
} else if (level === "ERROR") {
console.error(formattedMessage);
} else if (level === "DEBUG") {
if (isDev) {
console.log(formattedMessage);
}
} else {
console.log(formattedMessage);
}
}
/**
* Log an INFO message
* @param module Module log comes from
* @param msg Message to write
*/
info(module: string, msg: any) {
this.log(module, msg, "info");
}
/**
* Log a WARN message
* @param module Module log comes from
* @param msg Message to write
*/
warn(module: string, msg: any) {
this.log(module, msg, "warn");
}
/**
* Log an ERROR message
* @param module Module log comes from
* @param msg Message to write
*/
error(module: string, msg: any) {
this.log(module, msg, "error");
}
/**
* Log a DEBUG message
* @param module Module log comes from
* @param msg Message to write
*/
debug(module: string, msg: any) {
this.log(module, msg, "debug");
}
/**
* Log an exeption as an ERROR
* @param module Module log comes from
* @param exception The exeption to include
* @param msg The message to write
*/
exception(module: string, exception: any, msg: any) {
let finalMessage = exception
if (msg) {
finalMessage = `${msg}: ${exception}`
}
this.log(module, finalMessage , "error");
}
}
export const log = new Logger();
declare global { interface String { replaceAll(str: string, newStr: string): string; } }
/**
* String.prototype.replaceAll() polyfill
* https://gomakethings.com/how-to-replace-a-section-of-a-string-with-another-one-with-vanilla-js/
* @author Chris Ferdinandi
* @license MIT
*/
export function polyfill() {
if (!String.prototype.replaceAll) {
String.prototype.replaceAll = function (str: string, newStr: string) {
// If a regex pattern
if (Object.prototype.toString.call(str).toLowerCase() === "[object regexp]") {
return this.replace(str, newStr);
}
// If a string
return this.replace(new RegExp(str, "g"), newStr);
};
}
}
export class TimeLogger {
startTime: number;
constructor() {
this.startTime = dayjs().valueOf();
}
/**
* Output time since start of monitor
* @param name Name of monitor
*/
print(name: string) {
if (isDev && process.env.TIMELOGGER === "1") {
console.log(name + ": " + (dayjs().valueOf() - this.startTime) + "ms")
}
}
}
/**
* Returns a random number between min (inclusive) and max (exclusive)
*/
export function getRandomArbitrary(min: number, max: number) {
return Math.random() * (max - min) + min;
}
/**
* From: https://stackoverflow.com/questions/1527803/generating-random-whole-numbers-in-javascript-in-a-specific-range
*
* Returns a random integer between min (inclusive) and max (inclusive).
* The value is no lower than min (or the next integer greater than min
* if min isn't an integer) and no greater than max (or the next integer
* lower than max if max isn't an integer).
* Using Math.round() will give you a non-uniform distribution!
*/
export function getRandomInt(min: number, max: number) {
min = Math.ceil(min);
max = Math.floor(max);
return Math.floor(Math.random() * (max - min + 1)) + min;
}
/**
* Returns either the NodeJS crypto.randomBytes() function or its
* browser equivalent implemented via window.crypto.getRandomValues()
*/
let getRandomBytes = (
(typeof window !== 'undefined' && window.crypto)
// Browsers
? function () {
return (numBytes: number) => {
let randomBytes = new Uint8Array(numBytes);
for (let i = 0; i < numBytes; i += 65536) {
window.crypto.getRandomValues(randomBytes.subarray(i, i + Math.min(numBytes - i, 65536)));
}
return randomBytes;
};
}
// Node
: function() {
return require("crypto").randomBytes;
}
)();
/**
* Get a random integer suitable for use in cryptography between upper
* and lower bounds.
* @param min Minimum value of integer
* @param max Maximum value of integer
* @returns Cryptographically suitable random integer
*/
export function getCryptoRandomInt(min: number, max: number):number {
// synchronous version of: https://github.com/joepie91/node-random-number-csprng
const range = max - min
if (range >= Math.pow(2, 32))
console.log("Warning! Range is too large.")
let tmpRange = range
let bitsNeeded = 0
let bytesNeeded = 0
let mask = 1
while (tmpRange > 0) {
if (bitsNeeded % 8 === 0) bytesNeeded += 1
bitsNeeded += 1
mask = mask << 1 | 1
tmpRange = tmpRange >>> 1
}
const randomBytes = getRandomBytes(bytesNeeded)
let randomValue = 0
for (let i = 0; i < bytesNeeded; i++) {
randomValue |= randomBytes[i] << 8 * i
}
randomValue = randomValue & mask;
if (randomValue <= range) {
return min + randomValue
} else {
return getCryptoRandomInt(min, max)
}
}
/**
* Generate a random alphanumeric string of fixed length
* @param length Length of string to generate
* @returns string
*/
export function genSecret(length = 64) {
let secret = "";
const chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
const charsLength = chars.length;
for ( let i = 0; i < length; i++ ) {
secret += chars.charAt(getCryptoRandomInt(0, charsLength - 1));
}
return secret;
}
/**
* Get the path of a monitor
* @param id ID of monitor
* @returns Formatted relative path
*/
export function getMonitorRelativeURL(id: string) {
return "/dashboard/" + id;
}