How to use POP3ClientSession::retrieveMessage ?

[coldiceangel]

In ...\poco-1.3.6p2-all\Net\src\POP3ClientSession.cpp :

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void POP3ClientSession::retrieveMessage(int id, MailMessage& message, PartHandler& handler)

If a message has many different kinds of attachments, only one "PartHandler" is enough ?
I've learnt poco lib for 3 days and sorry for my poor discription
Thanks

[coldiceangel]

I reread the source code, it seems that I should derive my own class from PartHandler and overwrite the handlePart function, and my own handlePart function will do a lot of things, right ?

[guenter]

That would be a good start.

[coldiceangel]

That would be a good start.

Can I leave my messages on server using POCO ? Or maybe I should extend some components of it? If not, imap would be the only choice?

[coldiceangel]

Why these codes don't work properly ?

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std::vector<POP3ClientSession::MessageInfo> infos;

   session.listMessages(infos);

   if (infos.empty() == false)
   {
      MessageHeader header;
      MailMessage message;
      session.retrieveHeader(infos.size(), header);
      std::string str;
      str = header.get("From");
      str = header.get("To");
      str = header.get("Subject");

      session.retrieveMessage(infos.size(), message);
      str = message.getContent();
   }

   session.close();

Code: Select all

void POP3ClientSession::retrieveMessage(int id, MailMessage& message)
{
   std::string response;
   sendCommand("RETR", NumberFormatter::format(id), response); // the problem reside here
   if (!isPositive(response)) throw POP3Exception("Cannot get message list", response);
   DialogInputStream sis(_socket);
   MailInputStream mis(sis);
   message.read(mis);
   while (mis.good()) mis.get(); // read any remaining junk
}

Is there anything wrong?

[coldiceangel]

Why these codes don't work properly ?

Code: Select all

std::vector<POP3ClientSession::MessageInfo> infos;

   session.listMessages(infos);

   if (infos.empty() == false)
   {
      MessageHeader header;
      MailMessage message;
      session.retrieveHeader(infos.size(), header);
      std::string str;
      str = header.get("From");
      str = header.get("To");
      str = header.get("Subject");

      session.retrieveMessage(infos.size(), message);
      str = message.getContent();
   }

   session.close();

Code: Select all

void POP3ClientSession::retrieveMessage(int id, MailMessage& message)
{
   std::string response;
   sendCommand("RETR", NumberFormatter::format(id), response); // the problem reside here
   if (!isPositive(response)) throw POP3Exception("Cannot get message list", response);
   DialogInputStream sis(_socket);
   MailInputStream mis(sis);
   message.read(mis);
   while (mis.good()) mis.get(); // read any remaining junk
}

Is there anything wrong?

It seems that

Code: Select all

void POP3ClientSession::retrieveMessage(int id, MailMessage& message)

is only used for singl-part message, right ?

I find

Code: Select all

void POP3ClientSession::retrieveHeader(int id, MessageHeader& header)

and

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void MailMessage::readHeader(std::istream& istr)

cannot handle some additional words like these : This is a multi-part message in MIME format.

[coldiceangel]

When I try to decode reply message of an original email, Base64Decoder cannot work properly and output nothing, why ? Is there anybody who can help me ? Thanks

[coldiceangel]

When I try to decode reply message of an original email, Base64Decoder cannot work properly and output nothing, why ? Is there anybody who can help me ? Thanks

Problem is solved.

[coldiceangel]

Why these codes don't work properly ?

Code: Select all

std::vector<POP3ClientSession::MessageInfo> infos;

   session.listMessages(infos);

   if (infos.empty() == false)
   {
      MessageHeader header;
      MailMessage message;
      session.retrieveHeader(infos.size(), header);
      std::string str;
      str = header.get("From");
      str = header.get("To");
      str = header.get("Subject");

      session.retrieveMessage(infos.size(), message);
      str = message.getContent();
   }

   session.close();

Code: Select all

void POP3ClientSession::retrieveMessage(int id, MailMessage& message)
{
   std::string response;
   sendCommand("RETR", NumberFormatter::format(id), response); // the problem reside here
   if (!isPositive(response)) throw POP3Exception("Cannot get message list", response);
   DialogInputStream sis(_socket);
   MailInputStream mis(sis);
   message.read(mis);
   while (mis.good()) mis.get(); // read any remaining junk
}

Is there anything wrong?

It seems that

Code: Select all

void POP3ClientSession::retrieveMessage(int id, MailMessage& message)

is only used for singl-part message, right ?

I find

Code: Select all

void POP3ClientSession::retrieveHeader(int id, MessageHeader& header)

and

Code: Select all

void MailMessage::readHeader(std::istream& istr)

cannot handle some additional words like these : This is a multi-part message in MIME format.

This is my solution:
In

Code: Select all

void POP3ClientSession::retrieveHeader(int id, MessageHeader& header)

,
I add some codes like these:

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int ch = 0;
         // skip stuff following header
    ch = mis.get(); // \r---not sure
    ch = mis.get(); // \n---not sure
          if (ch != '\n')
      mis.putback(ch);

   // ignore：This is a multi-part message in MIME format.
   while(mis.good()) ch = mis.get();

,
is that OK?

[coldiceangel]

I am only using text/plain now, and the charset is set to "gb2312", but sometimes the base64-encoded content adds an abitary character at the end, for example:

xOO6w7ChCsTjusO6w7ChLg==

is what I want,
but sometimes the .eml file shows

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xOO6w7ChCsTjusO6w7ChLg==?

or

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xOO6w7ChCsTjusO6w7ChLg==I

or

xOO6w7ChCsTjusO6w7ChLg==O

why?