CODEWITHSUNDEEP
c#asp.net-mvcencoding
Andriy Khrystyanovich
Andriy Khrystyanovich

Reputation: 1452

asp.net mvc file download name encoding

My application allow users to download files, but names of files can be in cyrillic encoding. When user downloads file i want name to be like user see, but in controller ContentDisposition doesn't allow name in cyrillic encoding, and i try to convert it to utf-8. Chrome, IE and opera downloads file with correct name:

enter image description here firefox and safari with something like this


enter image description here

my controller:

 public ActionResult Download()
        {
            var name = Request.Params["Link"];
            var filename = Request.Params["Name"];


            filename = GetCleanedFileName(filename);

            var cd = new ContentDisposition
            {
                FileName = filename,
                Inline = false,
            };


            Response.AppendHeader("Content-Disposition", cd.ToString());
            return File(name, "application/file");
        }


        public static string GetCleanedFileName(string s)
        {
            char[] chars = s.ToCharArray();

            StringBuilder sb = new StringBuilder();

            for (int index = 0; index < chars.Length; index++)
            {
                string encodedString = EncodeChar(chars[index]);
                sb.Append(encodedString);
            }
            return sb.ToString();
        }

        private static string EncodeChar(char chr)
        {
            UTF8Encoding encoding = new UTF8Encoding();

            StringBuilder sb = new StringBuilder();

            byte[] bytes = encoding.GetBytes(chr.ToString());

            for (int index = 0; index < bytes.Length; index++)
            {
                if (chr > 127)
                    sb.AppendFormat("%{0}", Convert.ToString(bytes[index], 16));
                else
                    sb.AppendFormat("{0}", chr);

            }

            return sb.ToString();
        }

Upvotes: 2

Views: 6079

Answers (1)

Anthony Shaw
Anthony Shaw

Reputation: 8166

Look here, we used this as an example to return the filename that we wished when downloading files through a controller.

http://www.simple-talk.com/dotnet/asp.net/asp.net-mvc-action-results-and-pdf-content/

The FileResult has a FileDownloadName property that you can set that it uses to set the Filename as it's sent to the Response when the user downloads it.

Upvotes: 1

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