How to upload image signature in docusign by c#? - docusignapi

Question

I want to upload an image to docusign by c#, but it does not work. Below is my code that I wrote with mvc4.
Please help me,
Thanks!
public class UploadFileController : Controller
{
static string email = "***"; // your account email
static string password = "***"; // your account password
static string integratorKey = "***"; // your account Integrator Key (found on Preferences -> API page)
static string baseURL = ""; // - we will retrieve this
static string accountId = "***"; // - we will retrieve this
static string userId = "***";
static string signatureName = "signature";
#region FormUpload
public static class FormUpload
{
private static readonly Encoding encoding = Encoding.UTF8;
public static HttpWebResponse MultipartFormDataPost(string postUrl, string userAgent, Dictionary<string, object> postParameters)
{
string formDataBoundary = String.Format("----------{0:N}", Guid.NewGuid());
string contentType = "multipart/form-data; boundary=" + formDataBoundary;
byte[] formData = GetMultipartFormData(postParameters, formDataBoundary);
return PostForm(postUrl, userAgent, contentType, formData);
}
private static HttpWebResponse PostForm(string postUrl, string userAgent, string contentType, byte[] formData)
{
HttpWebRequest request = WebRequest.Create(postUrl) as HttpWebRequest;
if (request == null)
{
throw new NullReferenceException("request is not a http request");
}
// Set up the request properties.
request.Method = "PUT";
request.ContentType = contentType;
// request.UserAgent = userAgent;
request.CookieContainer = new CookieContainer();
request.ContentLength = formData.Length;
string authenticateStr =
"<DocuSignCredentials>" +
"<Username>" + email + "</Username>" +
"<Password>" + password + "</Password>" +
"<IntegratorKey>" + integratorKey + "</IntegratorKey>" + // global (not passed)
"</DocuSignCredentials>";
request.Headers.Add("X-DocuSign-Authentication", authenticateStr);
using (Stream requestStream = request.GetRequestStream())
{
requestStream.Write(formData, 0, formData.Length);
requestStream.Close();
}
return request.GetResponse() as HttpWebResponse;
}
private static byte[] GetMultipartFormData(Dictionary<string, object> postParameters, string boundary)
{
Stream formDataStream = new System.IO.MemoryStream();
bool needsCLRF = false;
foreach (var param in postParameters)
{
// Thanks to feedback from commenters, add a CRLF to allow multiple parameters to be added.
// Skip it on the first parameter, add it to subsequent parameters.
if (needsCLRF)
formDataStream.Write(encoding.GetBytes("\r\n"), 0, encoding.GetByteCount("\r\n"));
needsCLRF = true;
if (param.Value is FileParameter)
{
FileParameter fileToUpload = (FileParameter)param.Value;
// Add just the first part of this param, since we will write the file data directly to the Stream
StringBuilder headerbuilder = new StringBuilder();
String header1, header2, header3, header4, header5, header6, header7, header8, header9, header10, header11, header12, header13;
header1 = String.Format("--{0}\r\nContent-Disposition: form-data; name =\"HTTPMethod\"", boundary);
header2 = String.Format("\n--{0}\r\nContent-Disposition: form-data; name =\"MethodName\"", boundary);
header3 = String.Format("\n--{0}\r\nContent-Disposition: form-data; name =\"MethodURI\"", boundary);
header4 = String.Format("\n--{0}\r\nContent-Disposition: form-data; name =\"BaseURL\"", boundary);
header5 = String.Format("\n--{0}\r\nContent-Disposition: form-data; name =\"PublicPath\"", boundary);
header6 = String.Format("\n--{0}\r\nContent-Disposition: form-data; name =\"Protocol\"", boundary);
header7 = String.Format("\n--{0}\r\nContent-Disposition: form-data; name =\"Version\"", boundary);
header8 = String.Format("\n--{0}\r\nContent-Disposition: form-data; name =\"Username\"", boundary);
header9 = String.Format("\n--{0}\r\nContent-Disposition: form-data; name =\"Password\"", boundary);
header10 = String.Format("\n--{0}\r\nContent-Disposition: form-data; name =\"IntegratorKey\"", boundary);
header11 = String.Format("\n--{0}\r\nContent-Disposition: form-data; name =\"pram[accountId]\"", boundary);
header12 = String.Format("\n--{0}\r\nContent-Disposition: form-data; name =\"param[userId]\"", boundary);
header13 = String.Format("\n--{0}\r\nContent-Disposition: form-data; name =\"signatureName\"", boundary);
//headerbuilder.Append(
string header = string.Format("\n--{0}\r\nContent-Disposition: form-data; name=\"{1}\"; filename=\"{2}\";\r\nContent-Type: {3}\r\n\r\n",
boundary,
param.Key,
fileToUpload.FileName ?? param.Key,
fileToUpload.ContentType ?? "application/octet-stream");
headerbuilder.Append(header1);
headerbuilder.Append(header2);
headerbuilder.Append(header3);
headerbuilder.Append(header4);
headerbuilder.Append(header5);
headerbuilder.Append(header6);
headerbuilder.Append(header7);
headerbuilder.Append(header8);
headerbuilder.Append(header9);
headerbuilder.Append(header10);
headerbuilder.Append(header11);
headerbuilder.Append(header12);
headerbuilder.Append(header13);
headerbuilder.Append(header);
String a = headerbuilder.ToString();
formDataStream.Write(encoding.GetBytes(headerbuilder.ToString()), 0, encoding.GetByteCount(headerbuilder.ToString()));
// Write the file data directly to the Stream, rather than serializing it to a string.
formDataStream.Write(fileToUpload.File, 0, fileToUpload.File.Length);
}
else
{
string postData = string.Format("--{0}\r\nContent-Disposition: form-data; name=\"{1}\"\r\n\r\n{2}",
boundary,
param.Key,
param.Value);
formDataStream.Write(encoding.GetBytes(postData), 0, encoding.GetByteCount(postData));
}
}
// Add the end of the request. Start with a newline
string footer = "\r\n--" + boundary + "--\r\n";
formDataStream.Write(encoding.GetBytes(footer), 0, encoding.GetByteCount(footer));
// Dump the Stream into a byte[]
formDataStream.Position = 0;
byte[] formData = new byte[formDataStream.Length];
formDataStream.Read(formData, 0, formData.Length);
formDataStream.Close();
return formData;
}
public class FileParameter
{
public byte[] File { get; set; }
public string FileName { get; set; }
public string ContentType { get; set; }
public FileParameter(byte[] file) : this(file, null) { }
public FileParameter(byte[] file, string filename) : this(file, filename, null) { }
public FileParameter(byte[] file, string filename, string contenttype)
{
File = file;
FileName = filename;
ContentType = contenttype;
}
}
}
#endregion
public ActionResult Index()
{
// Read file data
FileStream fs = new FileStream("D:\\signature3.jpg", FileMode.Open, FileAccess.Read);
byte[] data = new byte[fs.Length];
fs.Read(data, 0, data.Length);
fs.Close();
// Generate post objects
Dictionary<string, object> postParameters = new Dictionary<string, object>();
postParameters.Add("filename", "signature3.jpg");
postParameters.Add("fileformat", "jpg");
postParameters.Add("file", new FormUpload.FileParameter(data, "signature3.jpg", "image/jpg"));
// Create request and receive response
string postURL = "https://demo.docusign.net/restapi/v2/accounts/"+accountId+"/users/"+userId+"/signatures/"+signatureName+"/signature_image";
string userAgent = "Someone";
HttpWebResponse webResponse = FormUpload.MultipartFormDataPost(postURL, userAgent, postParameters);
// Process response
StreamReader responseReader = new StreamReader(webResponse.GetResponseStream());
string fullResponse = responseReader.ReadToEnd();
webResponse.Close();
Response.Write(fullResponse);
return View();
}
}

Answer 1

DocuSign imposes a 200K limit on signature image files. See the DocuSign REST API guide for more info. Page 247 describes the set signature image call:
http://docusign.com/sites/default/files/REST_API_Guide_v2.pdf