public void Initialize(string addres, string pass)
{
_client = new Pop3MimeClient("pop.gmail.com", 995, true, addres, pass);
_client.Trace += new TraceHandler(client_Trace);
_client.Warning += new WarningHandler(client_Warning);
_client.ReadTimeout = 60000; //give pop server 60 seconds to answer
}
static void Main(string[] args)
{
// TODO: Remove the comment signs from the next line, if you want to create some sample emails.
// SendTestmail();
//If you get a run time error her: SmtpFailedRecipientException, 'Mailbox unavailable. The server response was: 5.7.1 Unable to relay for',
//then you need to change the settings of the local IIS/SMTP server.
Console.WriteLine("POP3 MIME Client Demo");
Console.WriteLine("=====================");
Console.WriteLine();
XmlConfigurator.Configure(new FileInfo("Log4net.config"));
Pop3MimeClient DemoClient = new Pop3MimeClient("pop.gmail.com", 995, true, "*****@*****.**", "elvis3012");
//DemoClient.Trace += new TraceHandler(Console.WriteLine);
DemoClient.Trace += new TraceHandler((s) => log.Debug(s));
DemoClient.Warning += new WarningHandler((s, z) => log.Warn(s + " " + z));
DemoClient.ReadTimeout = 60000; //give pop server 60 seconds to answer
DemoClient.Connect();
int numberOfMailsInMailbox, mailboxSize;
DemoClient.GetMailboxStats(out numberOfMailsInMailbox, out mailboxSize);
//get at most the xx first emails
RxMailMessage mm;
int downloadNumberOfEmails;
int maxDownloadEmails = 99;
if (numberOfMailsInMailbox<maxDownloadEmails)
{
downloadNumberOfEmails = numberOfMailsInMailbox;
}
else
{
downloadNumberOfEmails = maxDownloadEmails;
}
for (int i = 1;i <= downloadNumberOfEmails;i++)
{
DemoClient.GetEmail(i, out mm);
if (mm==null)
{
Console.WriteLine("Email " + i.ToString() + " cannot be displayed.");
}
else
{
//Console.WriteLine(mm.MailStructure());
Console.WriteLine(mm.Body);
}
}
//close connection
DemoClient.Disconnect();
Console.WriteLine();
Console.WriteLine("======== Press Enter to end program");
Console.ReadLine();
}
/// <summary>
/// Process a MIME entity
///
/// A MIME entity consists of header and body.
/// Separator lines in the body might mark children MIME entities
/// </summary>
private MimeEntityReturnCode ProcessMimeEntity(RxMailMessage message, string parentBoundaryStart)
{
bool hasParentBoundary = parentBoundaryStart.Length > 0;
string parentBoundaryEnd = parentBoundaryStart + "--";
MimeEntityReturnCode boundaryMimeReturnCode;
//some format fields are inherited from parent, only the default for
//ContentType needs to be set here, otherwise the boundary parameter would be
//inherited too !
message.SetContentTypeFields("text/plain; charset=us-ascii");
//get header
//----------
string completeHeaderField = null; //consists of one start line and possibly several continuation lines
string response;
// read header lines until empty line is found (end of header)
while (true)
{
if (!readMultiLine(out response))
{
//POP3 server has not send any more lines
callGetEmailWarning("incomplete MIME entity header received");
//empty this message
while (readMultiLine(out response))
{
}
System.Diagnostics.Debugger.Break(); //didn't have a sample email to test this
return(MimeEntityReturnCode.problem);
}
if (response.Length < 1)
{
//empty line found => end of header
if (completeHeaderField != null)
{
ProcessHeaderField(message, completeHeaderField);
}
else
{
//there was only an empty header.
}
break;
}
//check if there is a parent boundary in the header (wrong format!)
if (hasParentBoundary && parentBoundaryFound(response, parentBoundaryStart, parentBoundaryEnd, out boundaryMimeReturnCode))
{
callGetEmailWarning("MIME entity header prematurely ended by parent boundary");
//empty this message
while (readMultiLine(out response))
{
}
System.Diagnostics.Debugger.Break(); //didn't have a sample email to test this
return(boundaryMimeReturnCode);
}
//read header field
//one header field can extend over one start line and multiple continuation lines
//a continuation line starts with at least 1 blank (' ') or tab
if (response[0] == ' ' || response[0] == '\t')
{
//continuation line found.
if (completeHeaderField == null)
{
callGetEmailWarning("Email header starts with continuation line");
//empty this message
while (readMultiLine(out response))
{
}
System.Diagnostics.Debugger.Break(); //didn't have a sample email to test this
return(MimeEntityReturnCode.problem);
}
else
{
// append space, if needed, and continuation line
if (completeHeaderField[completeHeaderField.Length - 1] != ' ')
{
//previous line did not end with a whitespace
//need to replace CRLF with a ' '
completeHeaderField += ' ' + response.TrimStart(WhiteSpaceChars);
}
else
{
//previous line did end with a whitespace
completeHeaderField += response.TrimStart(WhiteSpaceChars);
}
}
}
else
{
//a new header field line found
if (completeHeaderField == null)
{
//very first field, just copy it and then check for continuation lines
completeHeaderField = response;
}
else
{
//new header line found
ProcessHeaderField(message, completeHeaderField);
//save the beginning of the next line
completeHeaderField = response;
}
}
}//end while read header lines
//process body
//------------
MimeEntitySB.Length = 0; //empty StringBuilder. For speed reasons, reuse StringBuilder defined as member of class
string BoundaryDelimiterLineStart = null;
bool isBoundaryDefined = false;
if (message.ContentType.Boundary != null)
{
isBoundaryDefined = true;
BoundaryDelimiterLineStart = "--" + message.ContentType.Boundary;
}
//prepare return code for the case there is no boundary in the body
boundaryMimeReturnCode = MimeEntityReturnCode.bodyComplete;
//read body lines
while (readMultiLine(out response))
{
//check if there is a boundary line from this entity itself in the body
if (isBoundaryDefined && response.TrimEnd() == BoundaryDelimiterLineStart)
{
//boundary line found.
//stop the processing here and start a delimited body processing
return(ProcessDelimitedBody(message, BoundaryDelimiterLineStart, parentBoundaryStart, parentBoundaryEnd));
}
//check if there is a parent boundary in the body
if (hasParentBoundary &&
parentBoundaryFound(response, parentBoundaryStart, parentBoundaryEnd, out boundaryMimeReturnCode))
{
//a parent boundary is found. Decode the content of the body received so far, then end this MIME entity
//note that boundaryMimeReturnCode is set here, but used in the return statement
break;
}
//process next line
MimeEntitySB.Append(response + CRLF);
}
//a complete MIME body read
//convert received US ASCII characters to .NET string (Unicode)
string TransferEncodedMessage = MimeEntitySB.ToString();
bool isAttachmentSaved = false;
switch (message.ContentTransferEncoding)
{
case TransferEncoding.SevenBit:
//nothing to do
if (message.MediaMainType == "message" && message.MediaSubType == "rfc822")
{
System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
using (MemoryStream mem = new MemoryStream(encoding.GetBytes(TransferEncodedMessage)))
{
Pop3MimeClient pop3Embedded = new Pop3MimeClient(mem);
pop3Embedded.ProcessEmbedded(ref message);
message.SetContentTypeFields("message/rfc822");
}
}
else
{
saveMessageBody(message, TransferEncodedMessage);
}
break;
case TransferEncoding.Base64:
//convert base 64 -> byte[]
byte[] bodyBytes = System.Convert.FromBase64String(TransferEncodedMessage);
message.ContentStream = new MemoryStream(bodyBytes, false);
if (message.MediaMainType == "text")
{
//convert byte[] -> string
message.Body = DecodeByteArryToString(bodyBytes, message.BodyEncoding);
}
else if (message.MediaMainType == "image" || message.MediaMainType == "application")
{
SaveAttachment(message);
isAttachmentSaved = true;
}
break;
case TransferEncoding.QuotedPrintable:
saveMessageBody(message, QuotedPrintable.Decode(TransferEncodedMessage));
break;
default:
saveMessageBody(message, TransferEncodedMessage);
//no need to raise a warning here, the warning was done when analising the header
break;
}
if (message.ContentDisposition != null && message.ContentDisposition.DispositionType.ToLowerInvariant() == "attachment" && !isAttachmentSaved)
{
SaveAttachment(message);
isAttachmentSaved = true;
}
return(boundaryMimeReturnCode);
}
/// <summary>
/// Process a MIME entity
///
/// A MIME entity consists of header and body.
/// Separator lines in the body might mark children MIME entities
/// </summary>
private MimeEntityReturnCode ProcessMimeEntity(RxMailMessage message, string parentBoundaryStart)
{
bool hasParentBoundary = parentBoundaryStart.Length>0;
string parentBoundaryEnd = parentBoundaryStart + "--";
MimeEntityReturnCode boundaryMimeReturnCode;
//some format fields are inherited from parent, only the default for
//ContentType needs to be set here, otherwise the boundary parameter would be
//inherited too !
message.SetContentTypeFields("text/plain; charset=us-ascii");
//get header
//----------
string completeHeaderField = null; //consists of one start line and possibly several continuation lines
string response;
// read header lines until empty line is found (end of header)
while (true) {
if (!readMultiLine(out response)) {
//POP3 server has not send any more lines
callGetEmailWarning("incomplete MIME entity header received");
//empty this message
while (readMultiLine(out response)) { }
System.Diagnostics.Debugger.Break(); //didn't have a sample email to test this
return MimeEntityReturnCode.problem;
}
if (response.Length<1) {
//empty line found => end of header
if (completeHeaderField!=null) {
ProcessHeaderField(message, completeHeaderField);
}else{
//there was only an empty header.
}
break;
}
//check if there is a parent boundary in the header (wrong format!)
if (hasParentBoundary && parentBoundaryFound(response, parentBoundaryStart, parentBoundaryEnd, out boundaryMimeReturnCode)){
callGetEmailWarning("MIME entity header prematurely ended by parent boundary");
//empty this message
while (readMultiLine(out response)) { }
System.Diagnostics.Debugger.Break(); //didn't have a sample email to test this
return boundaryMimeReturnCode;
}
//read header field
//one header field can extend over one start line and multiple continuation lines
//a continuation line starts with at least 1 blank (' ') or tab
if (response[0]==' ' || response[0]=='\t') {
//continuation line found.
if (completeHeaderField==null){
callGetEmailWarning("Email header starts with continuation line");
//empty this message
while (readMultiLine(out response)) { }
System.Diagnostics.Debugger.Break(); //didn't have a sample email to test this
return MimeEntityReturnCode.problem;
}else {
// append space, if needed, and continuation line
if (completeHeaderField[completeHeaderField.Length-1]!=' ') {
//previous line did not end with a whitespace
//need to replace CRLF with a ' '
completeHeaderField += ' ' + response.TrimStart(WhiteSpaceChars);
} else {
//previous line did end with a whitespace
completeHeaderField += response.TrimStart(WhiteSpaceChars);
}
}
} else {
//a new header field line found
if (completeHeaderField==null) {
//very first field, just copy it and then check for continuation lines
completeHeaderField = response;
} else {
//new header line found
ProcessHeaderField(message, completeHeaderField);
//save the beginning of the next line
completeHeaderField = response;
}
}
}//end while read header lines
//process body
//------------
MimeEntitySB.Length=0; //empty StringBuilder. For speed reasons, reuse StringBuilder defined as member of class
string BoundaryDelimiterLineStart = null;
bool isBoundaryDefined = false;
if (message.ContentType.Boundary!=null) {
isBoundaryDefined = true;
BoundaryDelimiterLineStart = "--" + message.ContentType.Boundary;
}
//prepare return code for the case there is no boundary in the body
boundaryMimeReturnCode = MimeEntityReturnCode.bodyComplete;
//read body lines
while (readMultiLine(out response)) {
//check if there is a boundary line from this entity itself in the body
if (isBoundaryDefined && response.TrimEnd()==BoundaryDelimiterLineStart) {
//boundary line found.
//stop the processing here and start a delimited body processing
return ProcessDelimitedBody(message, BoundaryDelimiterLineStart, parentBoundaryStart, parentBoundaryEnd);
}
//check if there is a parent boundary in the body
if (hasParentBoundary &&
parentBoundaryFound(response, parentBoundaryStart, parentBoundaryEnd, out boundaryMimeReturnCode)) {
//a parent boundary is found. Decode the content of the body received so far, then end this MIME entity
//note that boundaryMimeReturnCode is set here, but used in the return statement
break;
}
//process next line
MimeEntitySB.Append(response + CRLF);
}
//a complete MIME body read
//convert received US ASCII characters to .NET string (Unicode)
string TransferEncodedMessage = MimeEntitySB.ToString();
bool isAttachmentSaved = false;
switch (message.ContentTransferEncoding) {
case TransferEncoding.SevenBit:
//nothing to do
if ( message.MediaMainType == "message" && message.MediaSubType == "rfc822" )
{
System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
using ( MemoryStream mem = new MemoryStream(encoding.GetBytes(TransferEncodedMessage)) )
{
Pop3MimeClient pop3Embedded = new Pop3MimeClient(mem);
pop3Embedded.ProcessEmbedded(ref message);
message.SetContentTypeFields("message/rfc822");
}
}
else
{
saveMessageBody(message, TransferEncodedMessage);
}
break;
case TransferEncoding.Base64:
//convert base 64 -> byte[]
byte[] bodyBytes = System.Convert.FromBase64String(TransferEncodedMessage);
message.ContentStream = new MemoryStream(bodyBytes, false);
if (message.MediaMainType=="text") {
//convert byte[] -> string
message.Body = DecodeByteArryToString(bodyBytes, message.BodyEncoding);
} else if (message.MediaMainType=="image" || message.MediaMainType=="application") {
SaveAttachment(message);
isAttachmentSaved = true;
}
break;
case TransferEncoding.QuotedPrintable:
saveMessageBody(message, QuotedPrintable.Decode(TransferEncodedMessage));
break;
default:
saveMessageBody(message, TransferEncodedMessage);
//no need to raise a warning here, the warning was done when analising the header
break;
}
if (message.ContentDisposition!=null && message.ContentDisposition.DispositionType.ToLowerInvariant()=="attachment" && !isAttachmentSaved) {
SaveAttachment(message);
isAttachmentSaved = true;
}
return boundaryMimeReturnCode;
}
