Загрузка фотографий на стену пользователя "вконтакте"

Код загрузки фотографии на сервер:

//ЗАГРУЗКА ФОТОГРАФИИ

//получение адреса сервера для загрузки фотографии

System.Net.ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };

System.Net.WebRequest post_request2 = System.Net.WebRequest.Create("https://api.vkontakte.ru/method/photos.getWallUploadServer?gid=100669061&access_token=" + textBox3.Text.Trim());

System.Net.WebResponse post_request_response2 = post_request2.GetResponse();

System.IO.Stream post_request_stream2 = post_request_response2.GetResponseStream();

System.IO.StreamReader post_request_stream_reader2 = new System.IO.StreamReader(post_request_stream2);

string post_request_answer2 = post_request_stream_reader2.ReadToEnd();

string[] words_empty = post_request_answer2.Split('"');

string s = words_empty[5];

s = s.Replace("\\/","/");

s = s.Replace("\\/","/");

s = s.Replace("\\/","/");

textBox6.Text = s;

//отправка файла на полученый сервер

NameValueCollection nvc = new NameValueCollection();

//nvc.Add("user", "user");

//nvc.Add("passwd", "passwd");

string s9;

s9 = HttpUploadFile(s, @"C:\file_1.jpg", "photo", "image/jpeg", nvc);

textBox6.Text = s9;

char[] delimiterChars = { ':', ',' };

string[] parameters = s9.Split(delimiterChars);

string server = parameters[1];

char[] delimiterChars2={':'};

string[] parameters2 = s9.Split(delimiterChars2);

string hash = parameters2[7];

char[] delimiterChars3 = { '"' };

string[] parameters3 = hash.Split(delimiterChars3);

hash = parameters3[1];

string photo = s9.Substring(s9.IndexOf("photo")+8, s9.IndexOf("hash") - s9.IndexOf("photo")-11);

photo = photo.Replace("\\\"", "\"");

//сохранение фотографии на сервере

string url3 = "https://api.vk.com/method/photos.saveWallPhoto?server=" + server + "&photo=" + HttpUtility.UrlEncode(photo) + "&hash=" + hash + "&access_token=" + textBox3.Text.Trim();

textBox6.Text = textBox6.Text + " ---------- " + url3;

System.Net.ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };

System.Net.WebRequest post_request3 = System.Net.WebRequest.Create(url3);

System.Net.WebResponse post_request_response3 = post_request3.GetResponse();

System.IO.Stream post_request_stream3 = post_request_response3.GetResponseStream();

System.IO.StreamReader post_request_stream_reader3 = new System.IO.StreamReader(post_request_stream3);

string post_request_answer3 = post_request_stream_reader3.ReadToEnd();

textBox6.Text = textBox6.Text + " ---------- " + post_request_answer3;

Код функции HttpUploadFile:

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

{

Console.WriteLine(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.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);

//Form Form1 = new Form1();

//Form

//textBox6.Text = reader2.ReadToEnd();

//MessageBox.Show(s3);

//Console.WriteLine(string.Format("File uploaded, server response is: {0}", reader2.ReadToEnd()));

string s3 = reader2.ReadToEnd();

return s3;

}

catch (Exception ex)

{

Console.WriteLine("Error uploading file", ex);

if (wresp != null)

{

wresp.Close();

wresp = null;

}

wresp = wr.GetResponse();

Stream stream2 = wresp.GetResponseStream();

StreamReader reader2 = new StreamReader(stream2);

string s3 = reader2.ReadToEnd();

return s3;

}

finally

{

wr = null;

}

}