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spider-rs

The spider project ported to Node.js

Getting Started

  1. npm i @spider-rs/spider-rs --save
import { Website, pageTitle } from "@spider-rs/spider-rs";

const website = new Website("https://rsseau.fr")
  .withHeaders({
    authorization: "somerandomjwt",
  })
  .withBudget({
    "*": 20, // limit max request 20 pages for the website
    "/docs": 10, // limit only 10 pages on the `/docs` paths
  })
  .withBlacklistUrl(["/resume"]) // regex or pattern matching to ignore paths
  .build();

// optional: page event handler
const onPageEvent = (_err, page) => {
  const title = pageTitle(page); // comment out to increase performance if title not needed
  console.info(`Title of ${page.url} is '${title}'`);
  website.pushData({
    status: page.statusCode,
    html: page.content,
    url: page.url,
    title,
  });
};

await website.crawl(onPageEvent);
await website.exportJsonlData("./storage/rsseau.jsonl");
console.log(website.getLinks());

Collect the resources for a website.

import { Website } from "@spider-rs/spider-rs";

const website = new Website("https://rsseau.fr")
  .withBudget({
    "*": 20,
    "/docs": 10,
  })
  // you can use regex or string matches to ignore paths
  .withBlacklistUrl(["/resume"])
  .build();

await website.scrape();
console.log(website.getPages());

Run the crawls in the background on another thread.

import { Website } from "@spider-rs/spider-rs";

const website = new Website("https://rsseau.fr");

const onPageEvent = (_err, page) => {
  console.log(page);
};

await website.crawl(onPageEvent, true);
// runs immediately

Use headless Chrome rendering for crawls.

import { Website } from "@spider-rs/spider-rs";

const website = new Website("https://rsseau.fr").withChromeIntercept(
  true,
  true,
);

const onPageEvent = (_err, page) => {
  console.log(page);
};

// the third param determines headless chrome usage.
await website.crawl(onPageEvent, false, true);
console.log(website.getLinks());

Cron jobs can be done with the following.

import { Website } from "@spider-rs/spider-rs";

const website = new Website("https://choosealicense.com").withCron(
  "1/5 * * * * *",
);
// sleep function to test cron
const stopCron = (time: number, handle) => {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve(handle.stop());
    }, time);
  });
};

const links = [];

const onPageEvent = (err, value) => {
  links.push(value);
};

const handle = await website.runCron(onPageEvent);

// stop the cron in 4 seconds
await stopCron(4000, handle);

Use the crawl shortcut to get the page content and url.

import { crawl } from "@spider-rs/spider-rs";

const { links, pages } = await crawl("https://rsseau.fr");
console.log(pages);

Benchmarks

View the benchmarks to see a breakdown between libs and platforms.

Test url: https://espn.com

libraries pages speed
spider(rust): crawl 150,387 1m
spider(nodejs): crawl 150,387 153s
spider(python): crawl 150,387 186s
scrapy(python): crawl 49,598 1h
crawlee(nodejs): crawl 18,779 30m

The benches above were ran on a mac m1, spider on linux arm machines performs about 2-10x faster.

Development

Install the napi cli npm i @napi-rs/cli --global.

  1. yarn build:test

ua_generator's People

Contributors

j-mendez avatar mcronce avatar

Stargazers

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Watchers

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Forkers

mcronce gmh5225

ua_generator's Issues

Move agent storing to opt in via Spider

The current API through api-layer does not update the agents that are used. This should be built into the spider hosted service. The users of the service can opt into sharing the user-agent to feed the random generation list.

Improve UA api handling new targets

When we the cron builds the next UA list to deploy it does not validate if the next version is newer.
It would be ideal to only update the slot if its a newer version.

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