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http_crawler.test.ts
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http_crawler.test.ts
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import http from 'node:http';
import type { AddressInfo } from 'node:net';
import { HttpCrawler } from '@crawlee/http';
import { MemoryStorageEmulator } from 'test/shared/MemoryStorageEmulator';
const router = new Map<string, http.RequestListener>();
router.set('/', (req, res) => {
res.setHeader('content-type', 'text/html; charset=utf-8');
res.end(`<html><head><title>Example Domain</title></head></html>`);
});
router.set('/hello.html', (req, res) => {
res.end(`<html><head><title>Example Domain</title></head></html>`);
});
router.set('/noext', (req, res) => {
res.end(`<html><head><title>Example Domain</title></head></html>`);
});
router.set('/invalidContentType', (req, res) => {
res.setHeader('content-type', 'crazy-stuff; charset=utf-8');
res.end(`<html><head><title>Example Domain</title></head></html>`);
});
router.set('/redirectAndCookies', (req, res) => {
res.setHeader('content-type', 'text/html');
res.setHeader('set-cookie', 'foo=bar');
res.setHeader('location', '/cookies');
res.statusCode = 302;
res.end();
});
router.set('/cookies', (req, res) => {
res.setHeader('content-type', 'text/html');
res.end(JSON.stringify(req.headers.cookie));
});
router.set('/redirectWithoutCookies', (req, res) => {
res.setHeader('location', '/cookies');
res.statusCode = 302;
res.end();
});
router.set('/echo', (req, res) => {
res.setHeader('content-type', 'text/html');
req.pipe(res);
});
router.set('/500Error', (req, res) => {
res.statusCode = 500;
res.end();
});
let server: http.Server;
let url: string;
beforeAll((cb) => {
server = http.createServer((request, response) => {
try {
const requestUrl = new URL(request.url, 'http://localhost');
router.get(requestUrl.pathname)(request, response);
} catch (error) {
response.destroy();
}
});
server.listen(() => {
url = `http://127.0.0.1:${(server.address() as AddressInfo).port}`;
cb();
});
});
afterAll((cb) => {
server.close(cb);
});
const localStorageEmulator = new MemoryStorageEmulator();
beforeEach(async () => {
await localStorageEmulator.init();
});
afterAll(async () => {
await localStorageEmulator.destroy();
});
test('works', async () => {
const results: string[] = [];
const crawler = new HttpCrawler({
maxRequestRetries: 0,
requestHandler: ({ body }) => {
results.push(body as string);
},
});
await crawler.run([url]);
expect(results[0].includes('Example Domain')).toBeTruthy();
});
test('parseWithCheerio works', async () => {
const results: string[] = [];
const crawler = new HttpCrawler({
maxRequestRetries: 0,
requestHandler: async ({ parseWithCheerio }) => {
const $ = await parseWithCheerio();
results.push($('title').text());
},
});
await crawler.run([`${url}/hello.html`]);
expect(results).toStrictEqual(['Example Domain']);
});
test('should parse content type from header', async () => {
const results: { type: string; encoding: BufferEncoding }[] = [];
const crawler = new HttpCrawler({
maxRequestRetries: 0,
requestHandler: ({ contentType }) => {
results.push(contentType);
},
});
await crawler.run([url]);
expect(results).toStrictEqual([
{
type: 'text/html',
encoding: 'utf-8',
},
]);
});
test('should parse content type from file extension', async () => {
const results: { type: string; encoding: BufferEncoding }[] = [];
const crawler = new HttpCrawler({
maxRequestRetries: 0,
requestHandler: ({ contentType }) => {
results.push(contentType);
},
});
await crawler.run([`${url}/hello.html`]);
expect(results).toStrictEqual([
{
type: 'text/html',
encoding: 'utf-8',
},
]);
});
test('no content type defaults to octet-stream', async () => {
const results: { type: string; encoding: BufferEncoding }[] = [];
const crawler = new HttpCrawler({
maxRequestRetries: 0,
additionalMimeTypes: ['*/*'],
requestHandler: ({ contentType }) => {
results.push(contentType);
},
});
await crawler.run([`${url}/noext`]);
expect(results).toStrictEqual([
{
type: 'application/octet-stream',
encoding: 'utf-8',
},
]);
});
test('invalid content type defaults to octet-stream', async () => {
const results: { type: string; encoding: BufferEncoding }[] = [];
const crawler = new HttpCrawler({
maxRequestRetries: 0,
additionalMimeTypes: ['*/*'],
requestHandler: ({ contentType }) => {
results.push(contentType);
},
});
await crawler.run([`${url}/invalidContentType`]);
expect(results).toStrictEqual([
{
type: 'application/octet-stream',
encoding: 'utf-8',
},
]);
});
test('handles cookies from redirects', async () => {
const results: string[] = [];
const crawler = new HttpCrawler({
sessionPoolOptions: {
maxPoolSize: 1,
},
handlePageFunction: async ({ body }) => {
results.push(JSON.parse(body.toString()));
},
});
await crawler.run([`${url}/redirectAndCookies`]);
expect(results).toStrictEqual([
'foo=bar',
]);
});
test('handles cookies from redirects - no empty cookie header', async () => {
const results: string[] = [];
const crawler = new HttpCrawler({
sessionPoolOptions: {
maxPoolSize: 1,
},
handlePageFunction: async ({ body }) => {
const str = body.toString();
if (str !== '') {
results.push(JSON.parse(str));
}
},
});
await crawler.run([`${url}/redirectWithoutCookies`]);
expect(results).toStrictEqual([]);
});
test('no empty cookie header', async () => {
const results: string[] = [];
const crawler = new HttpCrawler({
sessionPoolOptions: {
maxPoolSize: 1,
},
handlePageFunction: async ({ body }) => {
const str = body.toString();
if (str !== '') {
results.push(JSON.parse(str));
}
},
});
await crawler.run([`${url}/cookies`]);
expect(results).toStrictEqual([]);
});
test('POST with undefined (empty) payload', async () => {
const results: string[] = [];
const crawler = new HttpCrawler({
handlePageFunction: async ({ body }) => {
results.push(body.toString());
},
});
await crawler.run([
{
url: `${url}/echo`,
payload: undefined,
method: 'POST',
},
]);
expect(results).toStrictEqual(['']);
});
test('should ignore http error status codes set by user', async () => {
const failed: any[] = [];
const crawler = new HttpCrawler({
minConcurrency: 2,
maxConcurrency: 2,
ignoreHttpErrorStatusCodes: [500],
requestHandler: () => {},
failedRequestHandler: ({ request }) => {
failed.push(request);
},
});
await crawler.run([`${url}/500Error`]);
expect(crawler.autoscaledPool.minConcurrency).toBe(2);
expect(failed).toHaveLength(0);
});
test('should throw an error on http error status codes set by user', async () => {
const failed: any[] = [];
const crawler = new HttpCrawler({
minConcurrency: 2,
maxConcurrency: 2,
additionalHttpErrorStatusCodes: [200],
requestHandler: () => {},
failedRequestHandler: ({ request }) => {
failed.push(request);
},
});
await crawler.run([`${url}/hello.html`]);
expect(crawler.autoscaledPool.minConcurrency).toBe(2);
expect(failed).toHaveLength(1);
});
test('should work with delete requests', async () => {
const failed: any[] = [];
const cheerioCrawler = new HttpCrawler({
maxConcurrency: 1,
maxRequestRetries: 0,
navigationTimeoutSecs: 5,
requestHandlerTimeoutSecs: 5,
requestHandler: async () => {},
failedRequestHandler: async ({ request }) => {
failed.push(request);
},
});
await cheerioCrawler.run([{
url: `${url}`,
method: 'DELETE',
}]);
expect(failed).toHaveLength(0);
});