检查响应状态后将 RestSharp 响应作为流处理？

Question

我必须能够使用 RestSharp 从我们的 Rest API 流式传输大文件。这样做的规范方法是在请求上设置“ResponseWriter”属性：

var client = new RestClient
var request = new RestRequest();
IRestResponse response;
request.ResponseWriter = connectStream => {
  if(response.StatusCode == ResponseStatus.OK)
  {
     CloudStorage.UploadFromStream(connectStream);
  }
  else
  {
     LoggerService.LogErrorFromStream(connectStream);
  }
};
response = client.Execute(request);

我的问题是“响应”对象（包括状态、状态代码、标题等）在 RestSharp 完成要求我的 ResponseWriter 处理整个流之前不可用。

这似乎违反直觉，因为当然用户可能希望根据响应状态更改响应流的处理方式。

如何在开始处理响应正文的流之前获取此状态信息？

Answer 1

我想这在here之前已经被举报过。

看起来他们released对此进行了更新，而这样做的方法是改用AdvancedResponseWriter。

var client = new RestClient
var request = new RestRequest();
IRestResponse response;
request.AdvancedResponseWriter = (stream, response) => {
    // Should be able to access response which is an IHttpResponse
};
response = client.Execute(request);

Docs.

Answer 2

看起来在调用 ResponseWriter 之前设置了一些标头，这发生在 ProcessResponseStream 方法中，并且在之后设置了一些标头。状态是调用 ResponseWriter 之后设置的那些标头之一。

见代码：RestSharp Http.cs

       private void ExtractResponseData(HttpResponse response, HttpWebResponse webResponse)
        {
            using (webResponse)
            {
#if FRAMEWORK
                response.ContentEncoding = webResponse.ContentEncoding;
                response.Server = webResponse.Server;
                response.ProtocolVersion = webResponse.ProtocolVersion;
#endif
                response.ContentType = webResponse.ContentType;
                response.ContentLength = webResponse.ContentLength;

                Stream webResponseStream = webResponse.GetResponseStream();

#if WINDOWS_PHONE
                if (string.Equals(webResponse.Headers[HttpRequestHeader.ContentEncoding], "gzip", StringComparison.OrdinalIgnoreCase))
                {
                    GZipStream gzStream = new GZipStream(webResponseStream);

                    ProcessResponseStream(gzStream, response);
                }
                else
                {
                    ProcessResponseStream(webResponseStream, response);
                }
#else
                this.ProcessResponseStream(webResponseStream, response);
#endif

                response.StatusCode = webResponse.StatusCode;
                response.StatusDescription = webResponse.StatusDescription;
                response.ResponseUri = webResponse.ResponseUri;
                response.ResponseStatus = ResponseStatus.Completed;