@mrtkrcm/mcp-puppeteer
Version:
Model Context Protocol server for browser automation using Puppeteer
157 lines • 8.02 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 };
case 5: _.label++; y = op[1]; op = [0]; continue;
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; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
import puppeteer from 'puppeteer';
import { getBrowserConfig } from './browserConfig.js';
/**
* Connect to a browser with retry logic
* @param endpoint WebSocket endpoint
* @param maxRetries Maximum number of retries
* @returns Connected browser instance
*/
export function connectWithRetry(endpoint_1) {
return __awaiter(this, arguments, void 0, function (endpoint, maxRetries) {
var retries, lastError, _loop_1, state_1;
if (maxRetries === void 0) { maxRetries = 3; }
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
retries = 0;
_loop_1 = function () {
var browser, error_1, delay_1;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
_b.trys.push([0, 2, , 5]);
console.error("Connection attempt ".concat(retries + 1, "/").concat(maxRetries + 1, " to ").concat(endpoint));
return [4 /*yield*/, puppeteer.connect({
browserWSEndpoint: endpoint,
protocolTimeout: 30000
})];
case 1:
browser = _b.sent();
return [2 /*return*/, { value: browser }];
case 2:
error_1 = _b.sent();
lastError = error_1 instanceof Error ? error_1 : new Error(String(error_1));
console.error("Connection attempt ".concat(retries + 1, " failed: ").concat(lastError.message));
if (!(retries < maxRetries)) return [3 /*break*/, 4];
delay_1 = Math.pow(2, retries) * 1000;
console.error("Retrying in ".concat(delay_1, "ms..."));
return [4 /*yield*/, new Promise(function (resolve) { return setTimeout(resolve, delay_1); })];
case 3:
_b.sent();
_b.label = 4;
case 4:
retries++;
return [3 /*break*/, 5];
case 5: return [2 /*return*/];
}
});
};
_a.label = 1;
case 1:
if (!(retries <= maxRetries)) return [3 /*break*/, 3];
return [5 /*yield**/, _loop_1()];
case 2:
state_1 = _a.sent();
if (typeof state_1 === "object")
return [2 /*return*/, state_1.value];
return [3 /*break*/, 1];
case 3: throw lastError || new Error('Failed to connect to browser after retries');
}
});
});
}
/**
* Set up event handlers for a page to capture errors and logs
* @param page Puppeteer page
* @param logs Array to store logs
*/
export function setupPageErrorHandlers(page, logs) {
// Console messages
page.on('console', function (msg) {
var logEntry = "[".concat(msg.type(), "] ").concat(msg.text());
logs.push(logEntry);
});
// Page errors
page.on('pageerror', function (error) {
logs.push("[ERROR] Page error: ".concat(error.message));
});
// Request failures
page.on('requestfailed', function (request) {
var _a;
logs.push("[NETWORK] Request failed: ".concat(request.url(), " - ").concat(((_a = request.failure()) === null || _a === void 0 ? void 0 : _a.errorText) || 'Unknown error'));
});
// Response errors (status >= 400)
page.on('response', function (response) {
var status = response.status();
if (status >= 400) {
logs.push("[NETWORK] Response error: ".concat(response.url(), " - Status ").concat(status));
}
});
}
/**
* Create a new page with default configuration
* @param browser Browser instance
* @returns Configured page
*/
export function createPage(browser) {
return __awaiter(this, void 0, void 0, function () {
var page, config;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, browser.newPage()];
case 1:
page = _a.sent();
config = getBrowserConfig();
if (!config.defaultViewport) return [3 /*break*/, 3];
return [4 /*yield*/, page.setViewport(config.defaultViewport)];
case 2:
_a.sent();
_a.label = 3;
case 3:
if (!config.userAgent) return [3 /*break*/, 5];
return [4 /*yield*/, page.setUserAgent(config.userAgent)];
case 4:
_a.sent();
_a.label = 5;
case 5: return [2 /*return*/, page];
}
});
});
}
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