Substitution of the response body for a request #3669

alex4845 · 2025-04-11T08:47:38Z

alex4845
Apr 11, 2025

I can't replace the response body with my own HTML. I use this code but it doesn't work. Maybe it's the headers:

import time
import mycdp
from seleniumbase import SB


async def request_paused_handler(event, tab):
    r = event.request
    rid = event.request_id
    # print(r.url)
    if url == r.url:
        print("Intercept!!!!!")
        headers = [mycdp.fetch.HeaderEntry(name="Content-Type", value="text/html")]
        tab.feed_cdp(mycdp.fetch.fulfill_request(
                request_id=rid,
                response_code=200,
                response_headers=headers,
                body="<html><body><h1>Hello World!</h1></body></html>",
            ))
    else:
        tab.feed_cdp(mycdp.fetch.continue_request(request_id=rid))

url = "https://example.com/"
with SB(uc=True, locale="en") as sb:
    sb.set_window_size(1100, 800)
    sb.activate_cdp_mode("about:blank")
    sb.cdp.add_handler(mycdp.fetch.RequestPaused, request_paused_handler)
    time.sleep(1)
    sb.cdp.open(url)
    sb.sleep(20)

I looked at all the available examples, but it didn't make things any clearer for me, sorry.