crawlerzzz
Version:
144 lines • 7.79 kB
JavaScript
;
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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) : new P(function (resolve) { resolve(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;
return g = { next: verb(0), "throw": verb(1), "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 (_) 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 };
}
};
var _this = this;
Object.defineProperty(exports, "__esModule", { value: true });
var rxjs_1 = require("rxjs");
var operators_1 = require("rxjs/operators");
var R = require("ramda");
var puppeteer = require("puppeteer");
var liveCrawler = function (opts) {
var _a = __assign({ startFrom: '', secondsWaitForLogin: 45, noDuplicatedLink: true, exitOnIdleSeconds: 60, rateLimit: 0, pageConfig: {
viewport: {
width: 1920,
height: 1080
}
} }, opts), domain = _a.domain, startFrom = _a.startFrom, noDuplicatedLink = _a.noDuplicatedLink, manualLogin = _a.manualLogin, processPage = _a.processPage, rateLimit = _a.rateLimit, exitOnIdleSeconds = _a.exitOnIdleSeconds, secondsWaitForLogin = _a.secondsWaitForLogin, launchConfig = _a.launchConfig, pageConfig = _a.pageConfig;
var link$ = new rxjs_1.BehaviorSubject({
url: startFrom
}).pipe(noDuplicatedLink ? operators_1.distinct(R.prop('url')) : R.identity);
if (manualLogin) {
launchConfig = __assign({ headless: false, userDataDir: '~/.browsercache' }, launchConfig);
}
var crawl = function () { return __awaiter(_this, void 0, void 0, function () {
var browser, page, workOnPage, pageSource$, idleTimeout$, queueLink;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, puppeteer.launch(launchConfig)];
case 1:
browser = _a.sent();
return [4 /*yield*/, browser.newPage()];
case 2:
page = _a.sent();
page.setViewport(pageConfig.viewport);
if (!manualLogin) return [3 /*break*/, 6];
return [4 /*yield*/, page.goto(domain + startFrom)];
case 3:
_a.sent();
return [4 /*yield*/, page.waitFor(secondsWaitForLogin * 1000)];
case 4:
_a.sent();
return [4 /*yield*/, browser.newPage()];
case 5:
page = _a.sent();
page.setViewport(pageConfig.viewport);
_a.label = 6;
case 6:
workOnPage = function (link) { return __awaiter(_this, void 0, void 0, function () {
var _a, url, data, src;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
_a = link.url, url = _a === void 0 ? '' : _a, data = link.data;
//@ts-ignore
return [4 /*yield*/, page.goto(url.startsWith('http') ? url : domain + url)];
case 1:
//@ts-ignore
_b.sent();
return [4 /*yield*/, processPage(page, link)];
case 2:
_b.sent();
return [4 /*yield*/, page.content()];
case 3:
src = _b.sent();
return [2 /*return*/, {
src: src,
url: url,
data: data
}];
}
});
}); };
pageSource$ = link$.pipe(operators_1.concatMap(function (link) {
return rxjs_1.of(link).pipe(
//@ts-ignore
operators_1.delay(rateLimit), operators_1.flatMap(workOnPage));
}));
idleTimeout$ = link$.pipe(operators_1.bufferTime(exitOnIdleSeconds * 1000), operators_1.filter(function (buffered) { return buffered.length == 0; }));
idleTimeout$.subscribe(function () {
console.log("Crawler has been idle for " + exitOnIdleSeconds + "ms. Exiting...");
//@ts-ignore
process.exit();
});
link$ = link$.pipe(operators_1.takeUntil(idleTimeout$));
queueLink = function (url, data) {
//@ts-ignore
return link$.next({ url: url, data: data });
};
return [2 /*return*/, {
pageSource$: pageSource$,
link$: link$,
queueLink: queueLink
}];
}
});
}); };
return crawl();
};
exports.default = liveCrawler;
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