c# - 在 .net 中重用一个 Web 响应并为许多操作休息

Question

我有个问题。

我有一个简单的服务，它执行请求并将响应流回文件，它看起来像：

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);
    }
}

我的问题是我可以重用流来对某个模型进行响应，而无需再次发送请求或打开文件数据正在流式传输到？

标签： c#rest.net-core

Answer 1

为什么不使用响应缓存中间件？

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

通过查询键可以帮助您：

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

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