How to capture the body value (Stream) of a request without deleting it?

Question

I’m trying to capture the body of a request in an authorization class (Authorizationhandler), but because this body is a Stream, after reading its contents the post request that comes next can not be executed because the stream has already been read and its content no longer exists.

I’m using the following code:

protected override Task HandleRequirementAsync(AuthorizationHandlerContext context, Autorizacao requirement)
{
    var routeValues = context.Resource as AuthorizationFilterContext;
    if (routeValues != null)
    {
        var obj = StreamToObject(routeValues.HttpContext.Request.Body);
        context.Succeed(requirement);
    }
    return Task.FromResult(0);
}

private Object StreamToObject(Stream stream)
{
    try
    {
        string content;
        using (var reader = new StreamReader(stream))
        content = reader.ReadToEnd();
        return Newtonsoft.Json.JsonConvert.DeserializeObject(content);
    }
    catch (Exception e)
    {
        throw e;
    }
}

I know this is happening because after reading the stream your content is being discarded, but I would like to know what I can do to get around this problem ?