CODEWITHSUNDEEP
c#asp.net-web-apiasp.net-web-api2
Ashwani K
Ashwani K

Reputation: 7980

Download File using web api 2

I am trying to download a file using web API 2. But the browser gives "the web page is not available" when I directly give the url in the browser.

I have written following Custom Action 

 public class FileActionResult : IHttpActionResult
    {
        public FileActionResult(string data)
        {
            this.Data = data;
        }

        public string Data { get; private set; }

        public Task<HttpResponseMessage> ExecuteAsync(CancellationToken cancellationToken)
        {
            string tempFolderPath = HttpContext.Current.Server.MapPath("~/api/tempfiles");
            HttpResponseMessage response = new HttpResponseMessage();
            Guid guid = Guid.NewGuid();
            string folderPath = Path.Combine(tempFolderPath, guid.ToString());
            if(!Directory.Exists(folderPath))
            {
                Directory.CreateDirectory(folderPath);
            }
            string filePath = Path.Combine(folderPath, guid.ToString() + ".json");
            File.WriteAllText(filePath, Data);
            string zipFile = folderPath + ".zip";
            ZipFile.CreateFromDirectory(folderPath, zipFile);
            response.Content = new StreamContent(File.OpenRead(zipFile));
            response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
            response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
            {
                FileName = "file.zip",
                DispositionType = "attachment"
            };
            return Task.FromResult(response);
        }
    }

I am not sure what is wrong here. Can somebody help me in this?

Edit When I use Google-PostMan to check the methods it shows proper response. How to force the browser to download the file? Thanks

Upvotes: 0

Views: 2260

Answers (1)

Ashwani K
Ashwani K

Reputation: 7980

The code is working fine. However the issue was related to Telerik Control. I am using Telerik controls on my website. Telerik was doing some compression while file download. I had to bypass my url to make it work.

    <sectionGroup name="telerik.web.ui">
      <section name="radCompression" type="Telerik.Web.UI.RadCompressionConfigurationSection, Telerik.Web.UI" allowDefinition="MachineToApplication" requirePermission="false"/>
    </sectionGroup>
  </configSections>

  <telerik.web.ui>
    <radCompression>
      <excludeHandlers>
        <add handlerPath="some path" matchExact="false"/>
      </excludeHandlers>
    </radCompression>
  </telerik.web.ui>

Upvotes: 1

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