@urixen/linkvertise
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A lightweight TypeScript SDK for converting URLs using Linkvertise
145 lines (144 loc) • 7.99 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g = Object.create((typeof Iterator === "function" ? Iterator : Object).prototype);
return g.next = verb(0), g["throw"] = verb(1), g["return"] = verb(2), typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
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case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
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op = body.call(thisArg, _);
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if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.str_is = exports.markup = exports.convert = exports.linkvertise = void 0;
var crypto = require("crypto");
var linkvertise = function (url_1, user_id_1) {
return __awaiter(this, arguments, void 0, function (url, user_id, options) {
if (options === void 0) { options = {}; }
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, convert(url, user_id, options)];
case 1: return [2 /*return*/, _a.sent()];
}
});
});
};
exports.linkvertise = linkvertise;
/**
* get converted url
* @param url - url to convert
* @param user_id - id of the user
* @param options - external options
*/
var convert = function (url, user_id, options) {
return __awaiter(this, void 0, void 0, function () {
var pemEncodedKey, importKey, base_href_1, filteredBlacklist, isBlacklisted, isWhitelisted, encodedHref, part1, part2, publicKey, encryptedHref, encryptedHrefBase64, fullEncryptedHref, base_url;
var _a, _b;
return __generator(this, function (_c) {
pemEncodedKey = "-----BEGIN PUBLIC KEY-----\n MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1piHDY9WRIehbfC3Fpol\n Ly/WrJF8TKFVdDMobj3fkNjN/69dTv9JgXt+gcJxVn/h4NCMtQ2mCQXNBMXzLOky\n HJipiFMoyPtOOlMlbWRAiaQE1GpMebGNRcsxYnWzF53v63+hUQgrMahH9X0Ii/NJ\n hvDyFlPX77+z9xiyd45L+xrgayePpOxvQpj6VJDlpNNKWbuIkFvkMmUVRM2TLulL\n JSgs4EgoBZgTYRpmhgR8tYfDOW+cOctffggcMAzKUC2CzYNmhzX15O7DKaZdYgfa\n BR/hqvyNAxBepHOJnBfHkQqaox5diHGqdwXXLwiJKzoK5R26vaI3jg2+d69VPSGL\n 0QIDAQAB\n -----END PUBLIC KEY-----";
importKey = function (pemEncodedKey) {
var pemHeader = "-----BEGIN PUBLIC KEY-----";
var pemFooter = "-----END PUBLIC KEY-----";
var pemContents = pemEncodedKey.substring(pemHeader.length, pemEncodedKey.length - pemFooter.length - 1);
// Remove whitespace and newlines
var cleanPemContents = pemContents.replace(/\s/g, '');
var binaryDerString = Buffer.from(cleanPemContents, 'base64');
return crypto.createPublicKey({
key: binaryDerString,
format: 'der',
type: 'spki'
});
};
try {
base_href_1 = markup(url);
if (!base_href_1.startsWith("http://") && !base_href_1.startsWith("https://")) {
throw new Error("URL must start with http:// or https://");
}
if (((_a = options.blacklist) === null || _a === void 0 ? void 0 : _a.length) > 0) {
filteredBlacklist = options.blacklist.filter(function (pattern) { return pattern.trim() !== ""; });
isBlacklisted = filteredBlacklist.some(function (pattern) { return str_is(pattern, base_href_1); });
if (isBlacklisted) {
throw new Error("URL is blacklisted");
}
}
if (((_b = options.whitelist) === null || _b === void 0 ? void 0 : _b.length) > 0) {
isWhitelisted = options.whitelist.some(function (pattern) { return str_is(pattern, base_href_1); });
if (!isWhitelisted) {
throw new Error("URL is not whitelisted");
}
}
encodedHref = Buffer.from(base_href_1, 'utf8');
part1 = void 0, part2 = void 0;
if (encodedHref.length > 70) {
part1 = encodedHref.slice(0, 70);
part2 = encodedHref.slice(70).toString('utf8');
}
else {
part1 = encodedHref;
part2 = "";
}
publicKey = importKey(pemEncodedKey);
encryptedHref = crypto.publicEncrypt({
key: publicKey,
padding: crypto.constants.RSA_PKCS1_OAEP_PADDING,
oaepHash: 'sha256'
}, part1);
encryptedHrefBase64 = encryptedHref.toString('base64');
fullEncryptedHref = "".concat(encryptedHrefBase64).concat(part2);
base_url = "https://link-to.net/".concat(user_id, "/").concat(Math.floor(Math.random() * 1000), "/dynamic/");
return [2 /*return*/, "".concat(base_url, "?r=").concat(fullEncryptedHref, "&v=2")];
}
catch (error) {
console.error("Error during key import or link processing:", error);
throw error;
}
return [2 /*return*/];
});
});
};
exports.convert = convert;
var markup = function (href) {
// Simple URL normalization
try {
var url = new URL(href);
return url.href.endsWith("/") ? url.href.slice(0, -1) : url.href;
}
catch (_a) {
return href.endsWith("/") ? href.slice(0, -1) : href;
}
};
exports.markup = markup;
var str_is = function (pattern, value) {
if (pattern.indexOf("*") === -1)
pattern = "*" + pattern + "*";
var regexPattern = pattern.replace(/\*/g, ".*");
var regex = new RegExp("^" + regexPattern + "$");
return regex.test(value);
};
exports.str_is = str_is;