I have a question.

I have a simple service that do requests and streams back response to file and it looks like:

public async ValueTask GetWaetherByLocation(string place)
{
    try
    {
        const string locationEndpoint = "https://localhost/api/place/?query=";

        var fullEndpoint = $"{locationEndpoint}{place}";
        HttpWebRequest request = WebRequest.CreateHttp(fullEndpoint);
        WebResponse response = await request.GetResponseAsync();

        ContentDispositionHeaderValue contentDisposition;

        var fileName = ContentDispositionHeaderValue.TryParse(response.Headers["Content-Disposition"], out contentDisposition)
            ? contentDisposition.FileName
            : "place.dat";

        var filePath = Path.Combine(assemblyPathInfo, fileName);

        using var stream = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None);
        await response.GetResponseStream().CopyToAsync(stream);
    }
    catch(Exception ex)
    {
        logger.Error(ex);
    }
}

My question is can I reuse stream to cast reponse to some model without the need to send request once more or opening file data is beeing streamed to?

CodePudding user response：

Why not use response caching middleware?

public void ConfigureServices(IServiceCollection services)
{
    services.AddResponseCaching();
    services.AddRazorPages();
}

By query key would help you:

var responseCachingFeature = context.HttpContext.Features.Get<IResponseCachingFeature>();

if (responseCachingFeature != null)
{
    responseCachingFeature.VaryByQueryKeys = new[] { "MyKey" };
}