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using Microsoft.AspNetCore.Http;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net.Http;

using System.Net.Http.Headers;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

namespace ApiGateway.Helper

{

public class HeaderDelegatingHandler : DelegatingHandler

{

private readonly IHttpContextAccessor _httpContextAccessor;

public HeaderDelegatingHandler(IHttpContextAccessor httpContextAccessor)

{

_httpContextAccessor = httpContextAccessor;

}

protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)

{

IEnumerable<string> headerValues;

if (request.Headers.TryGetValues("AccessToken", out headerValues))

{

string accessToken = headerValues.First();

request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);

request.Headers.Remove("AccessToken");

}

return await base.SendAsync(request, cancellationToken);

}

}

}