How to rewrite puppeteer request header in case sensitive?

Question

I try to rewrite the Header below:

await page.setExtraHTTPHeaders({
  "Accept-Language": "en-US;q=0.7",
});

However, when I inspect the network in Chrome, the request header is accept-language instead.

I expect it to be Accept-Language.

Any advice? Thanks.

Answer 1

I manage to work around with interception of the request like below:

await page.setRequestInterception(true);
page.on("request", request => {
  // Override headers
  const headers = Object.assign({}, request.headers(), {
    "Accept-Language": "en-US;q=0.7",
  });
  request.continue({ headers });
});