AspNetCoreServer: APIGatewayHttpApiV2ProxyFunction does not return multiple cookies correctly.

[petli]

Description

#713 reported that multiple cookies couldn't be handled, either in the HTTP requests or the responses. It was closed by #729, but that PR unfortunately only addressed the request bug, not the response bug, which is still present in 5.1.6.

Reproduction Steps

See #713

Environment

• Build Version: 5.1.6
• OS Info: Windows 10, Linux
• Build Environment: Visual Studio, dotnet CLI
• Targeted .NET Platform: .NET Core 3.1

Resolution

• 👋 I can/would-like-to implement a fix for this problem myself

Workaround from #713 until PR is merged:

protected override void PostMarshallResponseFeature(IHttpResponseFeature httpResponse, APIGatewayHttpApiV2ProxyResponse lambdaResponse, ILambdaContext lambdaContext)
{
    lambdaResponse.Headers?.Remove(HeaderNames.SetCookie);
    lambdaResponse.Cookies = httpResponse.Headers[HeaderNames.SetCookie].ToArray();
}

---

This is a 🐛 bug-report

[petli]

Closed by #751. Thanks @normj!

[github-actions]

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