如何通过Swagger从RestSharp将文件保存到磁盘

Question

[这个问题有点类似于this one，我已经使用了大多数接受的解决方案，包括建议的ResponseTypeFilter。

特别是我的Swagger控制器看起来像这样：

    [SwaggerFileResponse(HttpStatusCode.OK, "File Response")]
    [System.Web.Http.HttpGet]
    public void GetFileFromDownloadURL(string r_object_id = null)
    { //Task<Microsoft.Rest.HttpOperationResponse<System.IO.Stream>>?

        try
        {
            DocumentumDownloadFile file = new DocumentumDownloadFile();

            string[] r_object_ids = r_object_id.Split(',');
            foreach (string id in r_object_ids)
            {
                string topUrl = "..." + id.Trim() + "/download-url";
                ApiCall documentumCall = new ApiCall();
                IRestResponse response = documentumCall.ApiCaller(topUrl, false);

                JObject jsonres = JObject.Parse(response.Content);
                JArray array = (JArray)jsonres["entries"];

                string[] stringSeparators = new string[] {"D2"};
                string actual_download_url = "/D2" + array[0]["content"]["url"].ToString().Split(stringSeparators, StringSplitOptions.None)[1];
                ApiCall documentumCall2 = new ApiCall();
                IRestResponse downloadResponse = documentumCall2.ApiCaller(actual_download_url, true);


                File.WriteAllBytes("C:\temp\temp.pdf", downloadResponse.RawBytes);

            }

        }
        catch (Exception e)
        {

            throw new HttpResponseException(this.Request.CreateErrorResponse(HttpStatusCode.BadRequest, "An Error has occured, try again or  contact the administrator"));

        }

但是，我的代码在最后一个File.WriteAllbyte上失败，因为downloadResponse.RawBytes为null。这使我感到困惑，因为如果我在Postman中运行完全相同的下载URL并“另存为文件”，则文件将按预期保存。响应也看起来不错-找到了相关文件，只是没有传递给downloadUrl-response。

所以，那么我想我在ApiCaller方法中做的东西不正确，如下所示：

public IRestResponse ApiCaller(string topUrl, bool download)
    {
        string url = "..." + topUrl;
        var client = new RestClient(url)
        {
            Authenticator = new HttpBasicAuthenticator("...", "..")
        };

        var request = new RestRequest(Method.GET);

        request.AddHeader("Accept", "application/json");

        if (download)
        {
            //var path = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
            //client.DownloadData(request).SaveAs("C:\temp\temp.pdf");
            //var response = client.DownloadData(request);

            var tempFile = Path.GetTempFileName();
            var stream = File.Create(tempFile, 1024, FileOptions.DeleteOnClose);
            request.ResponseWriter = responseStream => responseStream.CopyTo(stream);
            return client.Execute(request);


        }

        else
        {
            var response = client.Execute(request);
            return response;

        }

    }

如果我在控制器中删除File.WriteAllbyte，则不会收到任何错误，而只会收到一个仅由“ [object Blob]”和响应代码204 No Content组成的响应正文。

我感谢您朝着正确的方向前进！谢谢。

Answer 1

我知道我做错了。 response = client.Execute(request);必须在request.ResponseWriter = responseStream => responseStream.CopyTo(stream);之前运行。然后，响应包含字节数据，并且可以将其返回给Controller以执行File.WriteAllBytes语句。

花了这么少的小小工作花了很多时间...