@router.default_handler
async def default_handler(context: PlaywrightCrawlingContext) -> None:
    # This is a fallback route which will handle the start URL.
    context.log.info(f'default_handler is processing {context.request.url}')
    
    await context.page.wait_for_selector('.collection-block-item')

    await context.enqueue_links(
        selector='.collection-block-item',
        label='CATEGORY',
    )

import asyncio
import json

from crawlee import Request
from crawlee.http_crawler import HttpCrawler, HttpCrawlingContext


async def main() -> None:
    crawler = HttpCrawler()

    # Define the default request handler, which will be called for every request.
    @crawler.router.default_handler
    async def request_handler(context: HttpCrawlingContext) -> None:
        context.log.info(f'Processing {context.request.url} ...')
        response = context.http_response.read().decode('utf-8')
        context.log.info(f'Response: {response}')  # To see the response in the logs.

    # Prepare a POST request to the form endpoint.
    request = Request.from_url(
        url='https://httpbin.org/post',
        method='POST',
        payload=json.dumps(
            {
                'custname': 'John Doe',
            }
        ).encode(),
    )

    # Run the crawler with the initial list of requests.
    await crawler.run([request])


if __name__ == '__main__':
    asyncio.run(main())