c# - openpop - Descargar archivo adjunto de correo electrónico

email download

Question

¿Cómo puedo navegar por el correo electrónico y descargar todos los archivos adjuntos?

public string Connect_Email ()
{
string Res = "";
try
{
mailclient = new TcpClient("pop.orange.fr", Convert.ToInt16("110"));
}
catch ( SocketException ExTrhown )
{
Res = "Unable to connect to server 1";
throw new Exception(ExTrhown.Message + "Unable to connect to server 1");
}
ns = mailclient.GetStream();
sr = new StreamReader(ns);
sw = new StreamWriter(ns);
response = sr.ReadLine(); //Get opening POP3 banner
sw.WriteLine("USER " + "[email protected]"); //Send username
sw.Flush();
response = sr.ReadLine();
if ( response.Substring(0, 4) == "-ERR" )
{
Res = "Unable to log into server 2";
}
sw.WriteLine("PASS " + "xxxxx"); //Send password
sw.Flush();
response = sr.ReadLine();
if ( response.Substring(0, 3) == "-ER" )
{
Res = "Unable to log into server 3";
}
return Res;
}
public void Get_Attacht ()
{
string ClientName = "";
#region Chercher Attachment
sw.WriteLine("STAT"); //Send stat command to get number of messages
sw.Flush();
response = sr.ReadLine();
//find number of message
string[] nummess = response.Split('' '');
totmessages = Convert.ToInt16(nummess[1]);
//read emails
for ( int i = 1; i <= totmessages; i++ )
{
msg = null;
sw.WriteLine("top " + i + " 0"); //read header of each message
sw.Flush();
response = sr.ReadLine();
while ( true )
{
response = sr.ReadLine();
if ( response == "." )
break;
msg = msg + response + "/r/n";
}
//read attachment
attachment = null;
if ( Regex.Match(msg, "multipart/mixed").Success )
{
msg = null;
sw.WriteLine("retr " + i.ToString()); //Retrieve entire message
sw.Flush();
response = sr.ReadLine();
while ( true )
{
response = sr.ReadLine();
if ( response == "." )
break;
msg = msg + response + "/r/n";
}
int End = msg.IndexOf(".csv");
string LeFile = msg.Substring(End - 9, 9);
if ( Regex.Match(msg, LeFile + ".csv").Success )
{
data = msg.Split(''/r'');
startindex = 0;
index = 0;
lastindex = 0;
x = null;
ms = null;
fs = null;
while ( true )
{
attachment = null;
while ( !Regex.Match(data[index].Trim(), "filename").Success )
{
index++;
}
if ( index == data.Length - 1 ) break;
FileName_Email = data[index].Trim().Substring(42).Replace("/"", "");
//find start of attachment data
index++;
while ( data[index].Length != 1 )
{
index++;
}
if ( index == data.Length - 1 ) break;
startindex = index + 1;
//find end of data
index = startindex + 1;
while ( ( !Regex.Match(data[index].Trim(), "--0").Success ) && ( data[index].Length != 1 ) && ( index < data.Length - 1 ) )
{
index++;
}
if ( index == data.Length ) break;
lastindex = index - 2;
for ( int j = startindex; j <= lastindex; j++ )
{
attachment = attachment + data[j];
}
attachment = attachment + "/r/n";
if ( Regex.Match(FileName_Email.ToLower(), "csv").Success )
{
byte[] filebytes = Convert.FromBase64String(attachment);
FileStream LeFS = new FileStream(filePath + "//testDEC.csv", FileMode.Create, FileAccess.Write, FileShare.None);
LeFS.Write(filebytes, 0, filebytes.Length);
LeFS.Close();
break;
}
}
}
}
}
sw.WriteLine("quit"); //quit
sw.Flush();
#endregion
}

No funciona, ¿tienes otra idea simple?

Answer 1

Pruebe algo como esto

using(Pop3 pop3 = new Pop3())
{
pop3.Connect("server");
pop3.UseBestLogin("user", "password");
foreach (string uid in pop3.GetAll())
{
IMail email = new MailBuilder()
.CreateFromEml(pop3.GetMessageByUID(uid));
Console.WriteLine(email.Subject);
// save all attachments to disk
email.Attachments.ForEach(mime => mime.Save(mime.SafeFileName));
}
pop3.Close();
} 

// aquí hay un enlace de referencia que puede usar también Cómo obtener adjuntos de correo electrónico

Answer 2

Si intentas leer un correo electrónico a través de POP3, te recomendaría usar la biblioteca OpenPOP.NET en lugar de crear la tuya propia. Es bastante fácil de usar.

Answer 3

Gracias a todos por su contribución. Finalmente uso POP3:

public string Connect_Email()
{
string Res = "";
try
{
Pop3Client email = new Pop3Client("login", "password", "server");
email.OpenInbox();
while (email.NextEmail())
{
if (email.IsMultipart)
{
IEnumerator enumerator = email.MultipartEnumerator;
while (enumerator.MoveNext())
{
Pop3Component multipart = (Pop3Component)
enumerator.Current;
if (multipart.IsBody)
{
//Console.WriteLine("Multipart body:" + multipart.Name);
}
else
{
//Console.WriteLine("Attachment name=" + multipart.Name); // ... etc
byte[] filebytes = Convert.FromBase64String(multipart.Data);
//Search FileName
int Begin = multipart.ContentType.IndexOf("name=");
string leFileNale = multipart.ContentType.Substring(Begin + 5, 12);
FileStream LeFS = new FileStream(filePath + "//" + leFileNale, FileMode.Create, FileAccess.Write, FileShare.None);
LeFS.Write(filebytes, 0, filebytes.Length);
LeFS.Close();
}
}
}
}
email.CloseConnection();
}
catch (Pop3LoginException)
{
Res = "Vous semblez avoir un problème de connexion!";
}
return Res;
}

Funciona bien, pero aún tengo que encontrar y descargar el adjunto yo mismo.

byte[] filebytes = Convert.FromBase64String(multipart.Data);
//Search FileName
int Begin = multipart.ContentType.IndexOf("name=");
string leFileNale = multipart.ContentType.Substring(Begin + 5, 12);
FileStream LeFS = new FileStream(filePath + "//" + leFileNale, FileMode.Create, FileAccess.Write, FileShare.None);
LeFS.Write(filebytes, 0, filebytes.Length);
LeFS.Close();