Get response headers from aurelia fetch-client

Question

I have a method to return file from web api

 public static HttpResponseMessage FileAsFileAttachment(byte[] bytes, string filename)
    {
        var result = new HttpResponseMessage(HttpStatusCode.OK) { Content = new ByteArrayContent(bytes) };

        result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");

        result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") { FileName = filename};

        return result;
    }

How can i read Content-Disposition header from responce?

 this.httpClient.fetch(`/company/get-asic-fee-autocomplete`).then(data=> { console.log(data.headers.get("Content-Disposition "))});

this header always null

How get filename and show all headers in aurelia fetch-client???

in my case console.log(data.headers) looks like https://gyazo.com/1d32a4e9226bac151102649d607716fa — Тарас Красниця, May 13 '16 at 14:00
I see that there is a space in your code `data.headers.get("Content-Disposition ")`. Try just `data.headers.get("content-disposition")` — Fabio, May 13 '16 at 14:11
no matter. this value always null. maybe aurelia fetch-client does not support some headers. — Тарас Красниця, May 13 '16 at 15:22
if you try to get `content-type` instead of `content-disposition`, does that work? — Fabio, May 13 '16 at 16:28
Take a look at the network tab of the developer's tool and make sure that the response header `content-disposition` is present. If it is, tell me and I'll try to investigate — Fabio, May 16 '16 at 13:29
Which version of `fetch` are you using, polyfilled or native? (are you using `import 'fetch'` somewhere?) — Fabio, May 16 '16 at 17:05
I use import {HttpClient} from "aurelia-fetch-client"; "aurelia-fetch-client": "npm:aurelia-fetch-client@1.0.0-beta.1.2.5", — Тарас Красниця, May 16 '16 at 19:50
This is described in the Fetch API and is NOT an issue with the aurelia-fetch-client. Have a look at https://developer.mozilla.org/de/docs/Web/HTTP/Headers/Access-Control-Expose-Headers If you have control over the server this should solve your problem. — Daniel Rosendorf, Nov 17 '17 at 08:46

score 0 · Answer 1 · answered Aug 05 '20 at 12:00

Just summing this up whoever next encounters the issue.
As mentioned above if you have CORS enabled, then

By default, only the 7 CORS-safelisted response headers are exposed, even though I could see content in response header when debugging. Take a look at https://developer.mozilla.org/de/docs/Web/HTTP/Headers/Access-Control-Expose-Headers

The Solution: add this code on the server side

Response.Headers.Add("Access-Control-Expose-Headers", "Content-Disposition");

score -1 · Answer 2 · answered May 25 '16 at 13:43

-1

A CORS-safelisted response-header name, given a CORS-exposed header-name list list, is a header name that is one of

Cache-Control Content-Language Content-Type Expires Last-Modified Pragma

any other headers are forbidden in aurelia fetch-client

Any value in list that is not a forbidden response-header name.

Get response headers from aurelia fetch-client

2 Answers2