Getting all response headers from an api request. Currently not all available

Question

I have an http request where I want some response headers that are, for one reason or another, unavailable to me from the response object but visible in the chrome dev tools

But the response object from the javascript request api only contains some of these headers.

{ // response.headers cache-control: "no-cache, private", content-type: "application/json" }

Surely, there must be a way to get things like x-ratelimit-limit as part of the response. If it's information sent to the browser, why can't it be available in a javascript http request api?

Evert · Accepted Answer · 2018-12-20 02:41:26Z

1

This looks like a CORS request. If so, response headers are restricted unless the right Access-Control-Allow-Headers header is set. This is for security reasons.

answered Dec 20, 2018 at 2:41

Evert

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2 Comments

Andrew Over a year ago

This was the answer I was hoping to not find. Attempting to add Access-Control-Allow-Headers responds with: Request header field Access-Control-Allow-Headers is not allowed by Access-Control-Allow-Headers in preflight response. This is a public api. Does that mean the other headers are fundamentally inaccessible?

Evert Over a year ago

@Andrew if you don't have control over the service, then your only option is to set up your own service and proxy the public service you're trying to access.

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