33fb73217d
* fix(core): Fix domain and url matching for isDomain/isUrl/extractDomain/extractUrl * Document regex and include www in the domain * Lint fix
576 lines
18 KiB
TypeScript
576 lines
18 KiB
TypeScript
/* eslint-disable @typescript-eslint/unbound-method */
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// import { createHash } from 'crypto';
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import { titleCase } from 'title-case';
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import * as ExpressionError from '../ExpressionError';
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import type { ExtensionMap } from './Extensions';
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import CryptoJS from 'crypto-js';
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import { encode } from 'js-base64';
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import { transliterate } from 'transliteration';
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const hashFunctions: Record<string, typeof CryptoJS.MD5> = {
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md5: CryptoJS.MD5,
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sha1: CryptoJS.SHA1,
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sha224: CryptoJS.SHA224,
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sha256: CryptoJS.SHA256,
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sha384: CryptoJS.SHA384,
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sha512: CryptoJS.SHA512,
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sha3: CryptoJS.SHA3,
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ripemd160: CryptoJS.RIPEMD160,
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};
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// All symbols from https://www.xe.com/symbols/ as for 2022/11/09
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const CURRENCY_REGEXP =
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/(\u004c\u0065\u006b|\u060b|\u0024|\u0192|\u20bc|\u0042\u0072|\u0042\u005a\u0024|\u0024\u0062|\u004b\u004d|\u0050|\u043b\u0432|\u0052\u0024|\u17db|\u00a5|\u20a1|\u006b\u006e|\u20b1|\u004b\u010d|\u006b\u0072|\u0052\u0044\u0024|\u00a3|\u20ac|\u00a2|\u0051|\u004c|\u0046\u0074|\u20b9|\u0052\u0070|\ufdfc|\u20aa|\u004a\u0024|\u20a9|\u20ad|\u0434\u0435\u043d|\u0052\u004d|\u20a8|\u20ae|\u004d\u0054|\u0043\u0024|\u20a6|\u0042\u002f\u002e|\u0047\u0073|\u0053\u002f\u002e|\u007a\u0142|\u006c\u0065\u0069|\u20bd|\u0414\u0438\u043d\u002e|\u0053|\u0052|\u0043\u0048\u0046|\u004e\u0054\u0024|\u0e3f|\u0054\u0054\u0024|\u20ba|\u20b4|\u0024\u0055|\u0042\u0073|\u20ab|\u005a\u0024)/gu;
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/*
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Extract the domain part from various inputs, including URLs, email addresses, and plain domains.
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/^(?:(?:https?|ftp):\/\/)? // Match optional http, https, or ftp protocols
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(?:mailto:)? // Match optional mailto:
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(?:\/\/)? // Match optional double slashes
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(?:www\.)? // Match optional www prefix
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(?:[-\w]*\.)? // Match any optional subdomain
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( // Capture the domain part
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(?:(?:[-\w]+\.)+ // Match one or more subdomains
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(?:[a-zA-Z]{2,}|xn--[a-zA-Z0-9]+) // Match top-level domain or Punycode encoded IDN(xn--80aswg.xn--p1ai)
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|localhost // Match localhost
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|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3} // Match IPv4 addresses
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)
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)
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(?::\d+)? // Match optional port number
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(?:\/[^\s?]*)? // Match optional path
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(?:\?[^\s#]*)? // Match optional query string
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(?:#[^\s]*)?$/i; // Match optional hash fragment
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*/
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const DOMAIN_EXTRACT_REGEXP =
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/^(?:(?:https?|ftp):\/\/)?(?:mailto:)?(?:\/\/)?((?:www\.)?(?:(?:[-\w]+\.)+(?:[a-zA-Z]{2,}|xn--[a-zA-Z0-9]+)|localhost|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}))(?::\d+)?(?:\/[^\s?]*)?(?:\?[^\s#]*)?(?:#[^\s]*)?$/i;
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/*
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Matches domain names without the protocol or optional subdomains
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/^(?:www\.)? // Match optional www prefix
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( // Capture the domain part
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(?:(?:[-\w]+\.)+ // Match one or more subdomains
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(?:[a-zA-Z]{2,}|xn--[a-zA-Z0-9]+) // Match top-level domain or Punycode encoded IDN
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|localhost // Match localhost
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|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3} // Match IPv4 addresses
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)
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)
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(?::\d+)? // Match optional port number
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(?:\/[^\s?]*)? // Match optional path
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(?:\?[^\s#]*)? // Match optional query string
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(?:#[^\s]*)?$/i; // Match optional fragment at the end of the string
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*/
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const DOMAIN_REGEXP =
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/^(?:www\.)?((?:(?:[-\w]+\.)+(?:[a-zA-Z]{2,}|xn--[a-zA-Z0-9]+)|localhost|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}))(?::\d+)?(?:\/[^\s?]*)?(?:\?[^\s#]*)?(?:#[^\s]*)?$/i;
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/*
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Matches email addresses
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/(
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( // Capture local part of the email address
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([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*) // One or more characters not in the set, followed by
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a period, followed by one or more characters not in the set
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|(".+") // Or one or more characters inside quotes
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)
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)
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@ // Match @ symbol
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(?<domain>( // Capture the domain part of the email address
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\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\] // Match IPv4 address inside brackets
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|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}) // Or match domain with at least two subdomains and TLD
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))/;
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*/
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const EMAIL_REGEXP =
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/(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@(?<domain>(\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))/;
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/*
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Matches URLs with strict beginning and end of the string checks
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/^(?:(?:https?|ftp):\/\/) // Match http, https, or ftp protocols at the start of the string
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(?:www\.)? // Match optional www prefix
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( // Capture the domain part
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(?:(?:[-\w]+\.)+ // Match one or more subdomains
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(?:[a-zA-Z]{2,}|xn--[a-zA-Z0-9]+) // Match top-level domain or Punycode encoded IDN
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|localhost // Match localhost
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|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3} // Match IPv4 addresses
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)
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)
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(?::\d+)? // Match optional port number
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(?:\/[^\s?#]*)? // Match optional path
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(?:\?[^\s#]*)? // Match optional query string
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(?=([^\s]+#.*)?) // Positive lookahead for the fragment identifier
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#?[^\s]*$/i; // Match optional fragment at the end of the string
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*/
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const URL_REGEXP_EXACT =
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/^(?:(?:https?|ftp):\/\/)(?:www\.)?((?:(?:[-\w]+\.)+(?:[a-zA-Z]{2,}|xn--[a-zA-Z0-9]+)|localhost|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}))(?::\d+)?(?:\/[^\s?#]*)?(?:\?[^\s#]*)?(?=([^\s]+#.*)?)#?[^\s]*$/i;
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/*
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Same as URL_REGEXP_EXACT but without the strict beginning and end of the string checks to allow for
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matching URLs in the middle of a string
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*/
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const URL_REGEXP =
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/(?:(?:https?|ftp):\/\/)(?:www\.)?((?:(?:[-\w]+\.)+(?:[a-zA-Z]{2,}|xn--[a-zA-Z0-9]+)|localhost|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}))(?::\d+)?(?:\/[^\s?#]*)?(?:\?[^\s#]*)?(?=([^\s]+#.*)?)#?[^\s]*/i;
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const CHAR_TEST_REGEXP = /\p{L}/u;
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const PUNC_TEST_REGEXP = /[!?.]/;
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function hash(value: string, extraArgs?: unknown): string {
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const [algorithm = 'MD5'] = extraArgs as string[];
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if (algorithm.toLowerCase() === 'base64') {
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// We're using a library instead of btoa because btoa only
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// works on ASCII
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return encode(value);
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}
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const hashFunction = hashFunctions[algorithm.toLowerCase()];
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if (!hashFunction) {
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throw new ExpressionError.ExpressionExtensionError(
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`Unknown algorithm ${algorithm}. Available algorithms are: ${Object.keys(hashFunctions)
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.map((s) => s.toUpperCase())
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.join(', ')}, and Base64.`,
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);
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}
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return hashFunction(value.toString()).toString();
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// return createHash(format).update(value.toString()).digest('hex');
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}
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function isEmpty(value: string): boolean {
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return value === '';
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}
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function isNotEmpty(value: string): boolean {
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return !isEmpty(value);
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}
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function length(value: string): number {
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return value.length;
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}
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function removeMarkdown(value: string): string {
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let output = value;
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try {
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output = output.replace(/^([\s\t]*)([*\-+]|\d\.)\s+/gm, '$1');
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output = output
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// Header
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.replace(/\n={2,}/g, '\n')
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// Strikethrough
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.replace(/~~/g, '')
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// Fenced codeblocks
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.replace(/`{3}.*\n/g, '');
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output = output
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// Remove HTML tags
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.replace(/<[\w|\s|=|'|"|:|(|)|,|;|/|0-9|.|-]+[>|\\>]/g, '')
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// Remove setext-style headers
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.replace(/^[=-]{2,}\s*$/g, '')
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// Remove footnotes?
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.replace(/\[\^.+?\](: .*?$)?/g, '')
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.replace(/\s{0,2}\[.*?\]: .*?$/g, '')
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// Remove images
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.replace(/!\[.*?\][[(].*?[\])]/g, '')
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// Remove inline links
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.replace(/\[(.*?)\][[(].*?[\])]/g, '$1')
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// Remove Blockquotes
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.replace(/>/g, '')
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// Remove reference-style links?
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.replace(/^\s{1,2}\[(.*?)\]: (\S+)( ".*?")?\s*$/g, '')
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// Remove atx-style headers
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.replace(/^#{1,6}\s*([^#]*)\s*(#{1,6})?/gm, '$1')
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.replace(/([*_]{1,3})(\S.*?\S)\1/g, '$2')
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.replace(/(`{3,})(.*?)\1/gm, '$2')
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.replace(/^-{3,}\s*$/g, '')
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.replace(/`(.+?)`/g, '$1')
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.replace(/\n{2,}/g, '\n\n');
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} catch (e) {
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return value;
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}
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return output;
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}
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function removeTags(value: string): string {
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return value.replace(/<[^>]*>?/gm, '');
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}
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function toDate(value: string): Date {
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const date = new Date(Date.parse(value));
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if (date.toString() === 'Invalid Date') {
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throw new ExpressionError.ExpressionExtensionError('cannot convert to date');
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}
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// If time component is not specified, force 00:00h
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if (!/:/.test(value)) {
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date.setHours(0, 0, 0);
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}
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return date;
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}
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function urlDecode(value: string, extraArgs: boolean[]): string {
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const [entireString = false] = extraArgs;
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if (entireString) {
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return decodeURI(value.toString());
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}
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return decodeURIComponent(value.toString());
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}
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function urlEncode(value: string, extraArgs: boolean[]): string {
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const [entireString = false] = extraArgs;
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if (entireString) {
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return encodeURI(value.toString());
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}
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return encodeURIComponent(value.toString());
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}
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function toInt(value: string, extraArgs: Array<number | undefined>) {
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const [radix] = extraArgs;
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const int = parseInt(value.replace(CURRENCY_REGEXP, ''), radix);
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if (isNaN(int)) {
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throw new ExpressionError.ExpressionExtensionError('cannot convert to integer');
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}
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return int;
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}
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function toFloat(value: string) {
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if (value.includes(',')) {
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throw new ExpressionError.ExpressionExtensionError(
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'cannot convert to float, expected . as decimal separator',
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);
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}
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const float = parseFloat(value.replace(CURRENCY_REGEXP, ''));
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if (isNaN(float)) {
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throw new ExpressionError.ExpressionExtensionError('cannot convert to float');
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}
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return float;
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}
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function quote(value: string, extraArgs: string[]) {
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const [quoteChar = '"'] = extraArgs;
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return `${quoteChar}${value
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.replace(/\\/g, '\\\\')
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.replace(new RegExp(`\\${quoteChar}`, 'g'), `\\${quoteChar}`)}${quoteChar}`;
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}
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function isNumeric(value: string) {
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if (value.includes(' ')) return false;
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return !isNaN(value as unknown as number) && !isNaN(parseFloat(value));
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}
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function isUrl(value: string) {
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return URL_REGEXP_EXACT.test(value);
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}
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function isDomain(value: string) {
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return DOMAIN_REGEXP.test(value);
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}
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function isEmail(value: string) {
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const result = EMAIL_REGEXP.test(value);
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// email regex is loose so check manually for now
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if (result && value.includes(' ')) {
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return false;
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}
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return result;
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}
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function toTitleCase(value: string) {
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return titleCase(value);
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}
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function replaceSpecialChars(value: string) {
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return transliterate(value, { unknown: '?' });
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}
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function toSentenceCase(value: string) {
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let current = value.slice();
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let buffer = '';
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while (CHAR_TEST_REGEXP.test(current)) {
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const charIndex = current.search(CHAR_TEST_REGEXP);
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current =
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current.slice(0, charIndex) +
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// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
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current[charIndex]!.toLocaleUpperCase() +
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current.slice(charIndex + 1).toLocaleLowerCase();
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const puncIndex = current.search(PUNC_TEST_REGEXP);
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if (puncIndex === -1) {
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buffer += current;
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current = '';
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break;
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}
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buffer += current.slice(0, puncIndex + 1);
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current = current.slice(puncIndex + 1);
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}
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return buffer;
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}
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function toSnakeCase(value: string) {
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return value
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.toLocaleLowerCase()
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.replace(/[ \-]/g, '_')
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.replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,.\/:;<=>?@\[\]^`{|}~]/g, '');
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}
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function extractEmail(value: string) {
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const matched = EMAIL_REGEXP.exec(value);
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if (!matched) {
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return undefined;
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}
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return matched[0];
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}
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function extractDomain(value: string) {
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if (isEmail(value)) {
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const matched = EMAIL_REGEXP.exec(value);
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// This shouldn't happen
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if (!matched) {
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return undefined;
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}
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return matched.groups?.domain;
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}
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const domainMatch = value.match(DOMAIN_EXTRACT_REGEXP);
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if (domainMatch) {
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return domainMatch[1];
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}
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return undefined;
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}
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function extractUrl(value: string) {
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const matched = URL_REGEXP.exec(value);
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if (!matched) {
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return undefined;
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}
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return matched[0];
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}
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removeMarkdown.doc = {
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name: 'removeMarkdown',
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description: 'Removes Markdown formatting from a string.',
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returnType: 'string',
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docURL:
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'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-removeMarkdown',
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};
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removeTags.doc = {
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name: 'removeTags',
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description: 'Removes tags, such as HTML or XML, from a string.',
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returnType: 'string',
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docURL:
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'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-removeTags',
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};
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toDate.doc = {
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name: 'toDate',
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description: 'Converts a string to a date.',
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returnType: 'Date',
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docURL:
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'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-toDate',
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};
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toFloat.doc = {
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name: 'toFloat',
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description: 'Converts a string to a decimal number.',
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returnType: 'number',
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aliases: ['toDecimalNumber'],
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docURL:
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'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-toDecimalNumber',
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};
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toInt.doc = {
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name: 'toInt',
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description: 'Converts a string to an integer.',
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returnType: 'number',
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args: [{ name: 'radix?', type: 'number' }],
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aliases: ['toWholeNumber'],
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docURL:
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'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-toInt',
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};
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toSentenceCase.doc = {
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name: 'toSentenceCase',
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description: 'Formats a string to sentence case. Example: "This is a sentence".',
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returnType: 'string',
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docURL:
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'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-toSentenceCase',
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};
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toSnakeCase.doc = {
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name: 'toSnakeCase',
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description: 'Formats a string to snake case. Example: "this_is_snake_case".',
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returnType: 'string',
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docURL:
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'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-toSnakeCase',
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};
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toTitleCase.doc = {
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name: 'toTitleCase',
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description: 'Formats a string to title case. Example: "This Is a Title".',
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returnType: 'string',
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docURL:
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'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-toTitleCase',
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};
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urlEncode.doc = {
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name: 'urlEncode',
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description: 'Encodes a string to be used/included in a URL.',
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args: [{ name: 'entireString?', type: 'boolean' }],
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returnType: 'string',
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docURL:
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'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-urlEncode',
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};
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urlDecode.doc = {
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name: 'urlDecode',
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description:
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'Decodes a URL-encoded string. It decodes any percent-encoded characters in the input string, and replaces them with their original characters.',
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returnType: 'string',
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docURL:
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'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-urlDecode',
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};
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replaceSpecialChars.doc = {
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name: 'replaceSpecialChars',
|
|
description: 'Replaces non-ASCII characters in a string with an ASCII representation.',
|
|
returnType: 'string',
|
|
docURL:
|
|
'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-replaceSpecialChars',
|
|
};
|
|
|
|
length.doc = {
|
|
name: 'length',
|
|
description: 'Returns the character count of a string.',
|
|
returnType: 'number',
|
|
docURL: 'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings',
|
|
};
|
|
|
|
isDomain.doc = {
|
|
name: 'isDomain',
|
|
description: 'Checks if a string is a domain.',
|
|
returnType: 'boolean',
|
|
docURL:
|
|
'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-isDomain',
|
|
};
|
|
|
|
isEmail.doc = {
|
|
name: 'isEmail',
|
|
description: 'Checks if a string is an email.',
|
|
returnType: 'boolean',
|
|
docURL:
|
|
'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-isEmail',
|
|
};
|
|
|
|
isNumeric.doc = {
|
|
name: 'isEmail',
|
|
description: 'Checks if a string only contains digits.',
|
|
returnType: 'boolean',
|
|
docURL:
|
|
'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-isNumeric',
|
|
};
|
|
|
|
isUrl.doc = {
|
|
name: 'isUrl',
|
|
description: 'Checks if a string is a valid URL.',
|
|
returnType: 'boolean',
|
|
docURL:
|
|
'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-isUrl',
|
|
};
|
|
|
|
isEmpty.doc = {
|
|
name: 'isEmpty',
|
|
description: 'Checks if a string is empty.',
|
|
returnType: 'boolean',
|
|
docURL:
|
|
'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-isEmpty',
|
|
};
|
|
|
|
isNotEmpty.doc = {
|
|
name: 'isNotEmpty',
|
|
description: 'Checks if a string has content.',
|
|
returnType: 'boolean',
|
|
docURL:
|
|
'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-isNotEmpty',
|
|
};
|
|
|
|
extractEmail.doc = {
|
|
name: 'extractEmail',
|
|
description: 'Extracts an email from a string. Returns undefined if none is found.',
|
|
returnType: 'string',
|
|
docURL:
|
|
'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-extractEmail',
|
|
};
|
|
|
|
extractDomain.doc = {
|
|
name: 'extractDomain',
|
|
description:
|
|
'Extracts a domain from a string containing a valid URL. Returns undefined if none is found.',
|
|
returnType: 'string',
|
|
docURL:
|
|
'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-extractDomain',
|
|
};
|
|
|
|
extractUrl.doc = {
|
|
name: 'extractUrl',
|
|
description: 'Extracts a URL from a string. Returns undefined if none is found.',
|
|
returnType: 'string',
|
|
docURL:
|
|
'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-extractUrl',
|
|
};
|
|
|
|
hash.doc = {
|
|
name: 'hash',
|
|
description: 'Returns a string hashed with the given algorithm. Default algorithm is `md5`.',
|
|
returnType: 'string',
|
|
args: [{ name: 'algo?', type: 'Algorithm' }],
|
|
docURL:
|
|
'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-hash',
|
|
};
|
|
|
|
quote.doc = {
|
|
name: 'quote',
|
|
description: 'Returns a string wrapped in the quotation marks. Default quotation is `"`.',
|
|
returnType: 'string',
|
|
args: [{ name: 'mark?', type: 'string' }],
|
|
docURL:
|
|
'https://docs.n8n.io/code-examples/expressions/data-transformation-functions/strings/#string-quote',
|
|
};
|
|
|
|
export const stringExtensions: ExtensionMap = {
|
|
typeName: 'String',
|
|
functions: {
|
|
hash,
|
|
removeMarkdown,
|
|
removeTags,
|
|
toDate,
|
|
toDecimalNumber: toFloat,
|
|
toFloat,
|
|
toInt,
|
|
toWholeNumber: toInt,
|
|
toSentenceCase,
|
|
toSnakeCase,
|
|
toTitleCase,
|
|
urlDecode,
|
|
urlEncode,
|
|
quote,
|
|
replaceSpecialChars,
|
|
length,
|
|
isDomain,
|
|
isEmail,
|
|
isNumeric,
|
|
isUrl,
|
|
isEmpty,
|
|
isNotEmpty,
|
|
extractEmail,
|
|
extractDomain,
|
|
extractUrl,
|
|
},
|
|
};
|