Reading JSON data in ASP.Net Core MVC

Question

I tried to find a solution for this, but all that works for previous versions of ASP.Net.

I work with JWT authentication middleware and have the following method:

private async Task GenerateToken(HttpContext context) { var username = context.Request.Form["username"]; var password = context.Request.Form["password"]; //Remainder of login code } 

Gets the submitted data as if it were form data, but my Angular 2 frontend sends the data as JSON.

 login(username: string, password: string): Observable<boolean> { let headers = new Headers({ 'Content-Type': 'application/json' }); let options = new RequestOptions({ headers: headers }); let body = JSON.stringify({ username: username, password: password });        return this.http.post(this._api.apiUrl + 'token', body, options)            .map((response: Response) => {                           });    } 

My preferred solution is to send it as JSON, but I could not get the data. I know that it is being sent because I see it as a violinist, and if I use Postman and just submit the form data, it works fine.

Basically, I just need to figure out how to change this line to read json data.

 var username = context.Request.Form["username"]; 

Answer 1

By the time it gets into your middleware, the request stream has already been read, so here you can specify Microsoft.AspNetCore.Http.Internal.EnableRewind in the request and read it yourself

Wide site coverage:

 Startup.cs using Microsoft.AspNetCore.Http.Internal; Startup.Configure(...){ ... //Its important the rewind us added before UseMvc app.Use(next => context => { context.Request.EnableRewind(); return next(context); }); app.UseMvc() ... } 

OR custom:

 private async Task GenerateToken(HttpContext context) { context.Request.EnableRewind(); string jsonData = new StreamReader(context.Request.Body).ReadToEnd(); ... }