getting the request body inside HttpContext from a Middleware in asp.net core 2.0

Question

I am having a simple middleware which fetches the body of the request and store it in a string. It is reading fine the stream, but the issue is it wont call my controller which

Answer 1

Few things are crucial here:

• enable buffering
• last flag leaveOpen in StreamReader
• reset request body stream position (SeekOrigin.Begin)

public void UseMyMiddleware(IApplicationBuilder app)
{
    app.Use(async (context, next) =>
    {
        context.Request.EnableBuffering();

        using (var reader = new StreamReader(context.Request.Body, Encoding.UTF8, false, 1024, true))
        {
            var body = await reader.ReadToEndAsync();

            context.Request.Body.Seek(0, SeekOrigin.Begin);
        }

        await next.Invoke();
    });
}