Sec-CH-UA is not overridden for 30X redirects

[Mattwmaster58]

On the redirected request, Sec-CH-UA is not properly overridden. I suspect this is a Chrome issue, and CDP spec isn't really specific on how Network.setExtraHTTPHeaders should work for headers that are already sent.

import asyncio
from playwright.async_api import async_playwright

async def main():
    async with async_playwright() as p:
        browser = await p.chromium.launch()
        page = await browser.new_page(extra_http_headers={"sec-ch-ua": "ARBITRARY"})
        await page.goto('http://127.0.0.1:9919')

asyncio.run(main())

Server:

from flask import Flask, request, redirect, make_response

app = Flask(__name__)
secch = "sec-ch-ua"


@app.route('/')
def handle_request():
    print(f"{secch}: {request.headers.get(secch)}")
    response = make_response(redirect('/cookie-set'))
    return response, 301


@app.route('/cookie-set')
def handle_requesta():
    cookie_name = '301-redirect-cookie'
    print(f"{secch}: {request.headers.get(secch)}")
    return 'cookie set!', 200


if __name__ == '__main__':
    app.run(debug=True, port=9919)

Output from server:

sec-ch-ua: ARBITRARY
sec-ch-ua: "HeadlessChrome";v="129", "Not=A?Brand";v="8", "Chromium";v="129"