<h3> [ C# ] HTTPWebrequest를 이용하여 파일 업로드 </h3>

HTTPWebrequest를 이용하여 파일 업로드

public static void HttpUploadFile(string url, string file, string paramName, string contentType, NameValueCollection nvc) {

        log.Debug(string.Format("Uploading {0} to {1}", file, url));

        string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");

        byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");

        HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url);

        wr.ContentType = "multipart/form-data; boundary=" + boundary;

        wr.Method = "POST";

        wr.KeepAlive = true;

        wr.Credentials = System.Net.CredentialCache.DefaultCredentials;

        Stream rs = wr.GetRequestStream();

        string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}";

        foreach (string key in nvc.Keys)

        {

            rs.Write(boundarybytes, 0, boundarybytes.Length);

            string formitem = string.Format(formdataTemplate, key, nvc[key]);

            byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);

            rs.Write(formitembytes, 0, formitembytes.Length);

        }

        rs.Write(boundarybytes, 0, boundarybytes.Length);

        string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n";

        string header = string.Format(headerTemplate, paramName, file, contentType);

        byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);

        rs.Write(headerbytes, 0, headerbytes.Length);

        FileStream fileStream = new FileStream(file, FileMode.Open, FileAccess.Read);

        byte[] buffer = new byte[4096];

        int bytesRead = 0;

        while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0) {

            rs.Write(buffer, 0, bytesRead);

        }

        fileStream.Close();

        byte[] trailer = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n");

        rs.Write(trailer, 0, trailer.Length);

        rs.Close();

        WebResponse wresp = null;

        try {

            wresp = wr.GetResponse();

            Stream stream2 = wresp.GetResponseStream();

            StreamReader reader2 = new StreamReader(stream2);

            log.Debug(string.Format("File uploaded, server response is: {0}", reader2.ReadToEnd()));

        } catch(Exception ex) {

            log.Error("Error uploading file", ex);

            if(wresp != null) {

                wresp.Close();

                wresp = null;

            }

        } finally {

            wr = null;

        }

    }

http://stackoverflow.com/questions/566462/upload-files-with-httpwebrequest-multipart-form-data