# 无头浏览器(JavaScript 渲染)

Использование JavaScript 生成时使用 JavaScript 令牌,因为它是 JavaScript 构建的页面（React、Angular等）, 或者因为内容是在浏览器上动态生成的。

# Вы хотите узнать?

Использование JavaScript в качестве примера Crawling API，我们在内部让您的请求在我们的无头浏览器基础设施上运行。使用 JS令牌可让您受益于更多功能,例如捕获图像的屏幕截图和绕过仅在启用浏览器的爬虫上运行的网站阻止。检查 参数 Используйте JS 爬行时可用。

# JavaScript API 速率限制

默认情况下 Crawling API JavaScript 抓取的速率限制为每秒 20 个请求（每天 1.728M个请求）。如果您需要更高的速率限制，请 联系支持 (打开新窗口) (открывается новое окно) 与您的用例。

# Использование JavaScript

curl "https://api.crawlbase.com/?token=_JS_TOKEN_&url=https://www.missguidedau.com/petite-black-msgd-insert-mesh-cut-out-gym-leggings-10202499"

require 'net/http'

uri = URI('https://api.crawlbase.com')
uri.query = URI.encode_www_form({
  token: '_JS_TOKEN_',
  url: 'https://www.missguidedau.com/petite-black-msgd-insert-mesh-cut-out-gym-leggings-10202499'})

res = Net::HTTP.get_response(uri)
puts "Response HTTP Status Code: \#{res.code}"
puts "Response HTTP Header Original Status: \#{res['original_status']}"
puts "Response HTTP Response Body: \#{res.body}"

const https = require('https');

const url = encodeURIComponent('https://www.missguidedau.com/petite-black-msgd-insert-mesh-cut-out-gym-leggings-10202499');
const options = {
  hostname: 'api.crawlbase.com',
  path: '/?token=_JS_TOKEN_&url=' + url
};

https.request(options, (response) => {
  let body = '';
  response.on('data', chunk => body += chunk).on('end', () => console.log(body));
}).end();

$url = urlencode('https://www.missguidedau.com/petite-black-msgd-insert-mesh-cut-out-gym-leggings-10202499');

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://api.crawlbase.com/?token=_JS_TOKEN_&url=' . $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);
curl_close($ch);

var_dump($response);

import requests
from urllib.parse import quote_plus

url = quote_plus('https://github.com/crawlbase?tab=repositories')

response = requests.get(f'https://api.crawlbase.com/?token=_JS_TOKEN_&url={url}')

print(response.text)

package main

import (
  "net/http"
  "fmt"
  "io/ioutil"
  "net/url"
)

func main() {
  url := url.QueryEscape("https://www.missguidedau.com/petite-black-msgd-insert-mesh-cut-out-gym-leggings-10202499")
  resp, _ := http.Get("https://api.crawlbase.com/?token=_JS_TOKEN_&url=" + url)

  defer resp.Body.Close()
  body, _ := ioutil.ReadAll(resp.Body)

  fmt.Println("response Body: ", string(body))

# Язык JavaScript

之前在您想要抓取的页面中执行自定义 JavaScript 代码,请 联系支持 (打开新窗口) (открывается новое окно) 与您的用例。