Angular 8 - overwrite content-length

Question

I am trying to send a large string to c# controller. controller signature looks like this:

public async Task<IHttpActionResult> Post([FromBody] string longString)

I am getting longString as null. I am doing the same in Postman and see that if turn off the default Content-Length header which says: "calculated when request is sent" and add the same header with a value that equal the length of the string + 8 the back end gets correct value as it does when default Content-Length header is on. My POST request from Angular has everything the same except the value of Content-Length header. It is equal the length of the string + 6. So, I am trying to change Content-Length header value to the one that works in Postman like this:

    headers = new HttpHeaders().set('Content-Type', 'application/json;');
    headers.set('Content-Length', '140317');

But Network shows that the above change is not taking a place.

Any idea how get it work?

Thanks

please try this if you can make it `headers.set('Content-Length', 1*(string.length));` check reference https://stackoverflow.com/a/2773465/6923146 — Hardik Masalawala, Feb 14 '21 at 17:39
Argument of type 'number' is not assignable to parameter of type 'string | string[]' — Mark, Feb 14 '21 at 17:46
`headers.set('Content-Length', (1*(string.length)).toString());` — Hardik Masalawala, Feb 15 '21 at 06:11
Just curios, how is it different from headers.set('Content-Length', '140317'); — Mark, Feb 15 '21 at 12:09
I think the problem is that HttpHeaders is immutable. You need to use a decorator pattern by chaining the calls: headers = new HttpHeaders().set(...).append(...).append(...) — Todd Sjolander, Apr 29 '22 at 10:17

Angular 8 - overwrite content-length

0 Answers0