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PPOP3 Class Reference

#include <inetmail.h>

Inheritance diagram for PPOP3:

PInternetProtocol PIndirectChannel PChannel PObject PPOP3Client PPOP3Server

List of all members.


Detailed Description

A TCP/IP socket for the Post Office Protocol version 3.

When acting as a client, the procedure is to make the connection to a remote server, then to retrieve a message using the following procedure:


      PPOP3Client mail("popserver");
      if (mail.IsOpen()) {
        if (mail.LogIn("Me", "password")) {
          if (mail.GetMessageCount() > 0) {
            PUnsignedArray sizes = mail.GetMessageSizes();
            for (PINDEX i = 0; i < sizes.GetSize(); i++) {
              if (mail.BeginMessage(i+1))
                mail.Read(myMessage, sizes[i]);
              else
                PError << "Error getting mail message." << endl;
            }
          }
          else
            PError << "No mail messages." << endl;
        }
        else
           PError << "Mail log in failed." << endl;
      }
      else
         PError << "Mail conection failed." << endl;
      

    When acting as a server, a descendant class would be created to override
    at least the HandleOpenMailbox(), HandleSendMessage() and
    HandleDeleteMessage() functions. Other functions may be overridden
    for further enhancement to the sockets capabilities, but these will give a
    basic POP3 server functionality.

    The server socket thread would continuously call the
    ProcessMessage() function until it returns FALSE. This will then
    call the appropriate virtual function on parsing the POP3 protocol.

Definition at line 529 of file inetmail.h.


Comparison functions

enum  Comparison { LessThan = -1, EqualTo = 0, GreaterThan = 1 }
virtual Comparison CompareObjectMemoryDirect (const PObject &obj) const
bool operator!= (const PObject &obj) const
bool operator< (const PObject &obj) const
bool operator<= (const PObject &obj) const
bool operator== (const PObject &obj) const
bool operator> (const PObject &obj) const
bool operator>= (const PObject &obj) const

Error functions

enum  ErrorGroup { LastReadError, LastWriteError, LastGeneralError, NumErrorGroups }
enum  Errors {
  NoError, NotFound, FileExists, DiskFull,
  AccessDenied, DeviceInUse, BadParameter, NoMemory,
  NotOpen, Timeout, Interrupted, BufferTooSmall,
  Miscellaneous, ProtocolFailure, NumNormalisedErrors
}
Errors GetErrorCode (ErrorGroup group=NumErrorGroups) const
int GetErrorNumber (ErrorGroup group=NumErrorGroups) const
static PString GetErrorText (Errors lastError, int osError=0)

Miscellaneous functions

enum  ShutdownValue { ShutdownRead = 0, ShutdownWrite = 1, ShutdownReadAndWrite = 2 }
void AbortCommandString ()
BOOL SendCommandString (const PString &command)
BOOL SetBufferSize (PINDEX newSize)

Scattered read/write functions

typedef std::vector< SliceVectorOfSlice
virtual BOOL Read (const VectorOfSlice &slices)
virtual BOOL Write (const VectorOfSlice &slices)

Run Time Type functions

virtual const char * GetClass (unsigned=0) const
virtual BOOL InternalIsDescendant (const char *clsName) const
BOOL IsClass (const char *cls) const
static const char * Class ()

I/O functions

virtual void PrintOn (ostream &strm) const
virtual void ReadFrom (istream &strm)
ostream & operator<< (ostream &strm, const PObject &obj)
istream & operator>> (istream &strm, PObject &obj)

Public Types

enum  Commands {
  USER, PASS, QUIT, RSET,
  NOOP, STATcmd, LIST, RETR,
  DELE, APOP, TOP, UIDL,
  AUTH, NumCommands
}
enum  PXBlockType { PXReadBlock, PXWriteBlock, PXAcceptBlock, PXConnectBlock }

Public Member Functions

virtual BOOL Accept (PSocket &listener)
virtual BOOL Connect (const PString &address, const PString &service)
virtual BOOL Connect (const PString &address, WORD port=0)
virtual int ExecuteCommand (PINDEX cmdNumber, const PString &param)
virtual int ExecuteCommand (PINDEX cmdNumber)
const PStringGetDefaultService () const
int GetLastResponseCode () const
PString GetLastResponseInfo () const
PIPSocketGetSocket () const
virtual BOOL Read (void *buf, PINDEX len)
virtual BOOL ReadCommand (PINDEX &num, PString &args)
virtual BOOL ReadLine (PString &line, BOOL allowContinuation=FALSE)
virtual BOOL ReadResponse (int &code, PString &info)
virtual BOOL ReadResponse ()
void SetReadLineTimeout (const PTimeInterval &t)
virtual void UnRead (const void *buffer, PINDEX len)
virtual void UnRead (const PString &str)
virtual void UnRead (int ch)
virtual BOOL Write (const void *buf, PINDEX len)
virtual BOOL WriteCommand (PINDEX cmdNumber, const PString &param)
virtual BOOL WriteCommand (PINDEX cmdNumber)
virtual BOOL WriteLine (const PString &line)
virtual BOOL WriteResponse (const PString &code, const PString &info)
virtual BOOL WriteResponse (unsigned numericCode, const PString &info)
Miscellaneous functions
virtual PObjectClone () const
Overrides from class PChannel
virtual BOOL Close ()
virtual PChannelGetBaseReadChannel () const
virtual PChannelGetBaseWriteChannel () const
virtual PString GetErrorText (ErrorGroup group=NumErrorGroups) const
virtual PString GetName () const
virtual BOOL IsOpen () const
virtual BOOL Shutdown (ShutdownValue option)
Overrides from class PObject
Comparison Compare (const PObject &obj) const
Information functions
int GetHandle () const
Reading functions
virtual PINDEX GetLastReadCount () const
PTimeInterval GetReadTimeout () const
virtual void OnReadComplete (void *buf, PINDEX len)
virtual BOOL ReadAsync (void *buf, PINDEX len)
BOOL ReadBlock (void *buf, PINDEX len)
virtual int ReadChar ()
PString ReadString (PINDEX len)
void SetReadTimeout (const PTimeInterval &time)
Writing functions
virtual PINDEX GetLastWriteCount () const
PTimeInterval GetWriteTimeout () const
virtual void OnWriteComplete (const void *buf, PINDEX len)
void SetWriteTimeout (const PTimeInterval &time)
virtual BOOL WriteAsync (const void *buf, PINDEX len)
BOOL WriteChar (int c)
BOOL WriteString (const PString &str)
Channel establish functions
PChannelGetReadChannel () const
PChannelGetWriteChannel () const
BOOL Open (PChannel *readChannel, PChannel *writeChannel, BOOL autoDeleteRead=TRUE, BOOL autoDeleteWrite=TRUE)
BOOL Open (PChannel *channel, BOOL autoDelete=TRUE)
BOOL Open (PChannel &channel)
BOOL SetReadChannel (PChannel *channel, BOOL autoDelete=TRUE)
BOOL SetWriteChannel (PChannel *channel, BOOL autoDelete=TRUE)
Overrides from class PObject
virtual PINDEX HashFunction () const

Static Public Member Functions

static BOOL ConvertOSError (int libcReturnValue, Errors &lastError, int &osError)

Protected Types

enum  StuffState {
  DontStuff, StuffIdle, StuffCR, StuffCRLF,
  StuffCRLFdot, StuffCRLFdotCR
}

Protected Member Functions

virtual BOOL ConvertOSError (int libcReturnValue, ErrorGroup group=LastGeneralError)
virtual BOOL OnOpen ()
virtual PINDEX ParseResponse (const PString &line)
int PXClose ()
BOOL PXSetIOBlock (PXBlockType type, const PTimeInterval &timeout)
int ReadCharWithTimeout (PTimeInterval &timeout)
BOOL ReceiveCommandString (int nextChar, const PString &reply, PINDEX &pos, PINDEX start)
BOOL SetErrorValues (Errors errorCode, int osError, ErrorGroup group=LastGeneralError)

Protected Attributes

PString channelName
PReadWriteMutex channelPointerMutex
 Race condition prevention on closing channel.
PStringArray commandNames
PString defaultServiceName
Errors lastErrorCode [NumErrorGroups+1]
 The platform independant error code.
int lastErrorNumber [NumErrorGroups+1]
 The operating system error number (eg as returned by errno).
PINDEX lastReadCount
 Number of byte last read by the Read() function.
int lastResponseCode
PString lastResponseInfo
PINDEX lastWriteCount
 Number of byte last written by the Write() function.
BOOL newLineToCRLF
int os_handle
 The operating system file handle return by standard open() function.
PXBlockType px_lastBlockType
PThreadpx_readThread
PMutex px_selectMutex
PThreadpx_selectThread
PMutex px_threadMutex
PMutex px_writeMutex
PThreadpx_writeThread
BOOL readAutoDelete
 Automatically delete read channel on destruction.
PChannelreadChannel
 Channel for read operations.
PTimeInterval readLineTimeout
PTimeInterval readTimeout
 Timeout for read operations.
enum PInternetProtocol::StuffState stuffingState
PCharArray unReadBuffer
PINDEX unReadCount
BOOL writeAutoDelete
 Automatically delete write channel on destruction.
PChannelwriteChannel
 Channel for write operations.
PTimeInterval writeTimeout
 Timeout for write operations.

Static Protected Attributes

static PString errResponse = "-ERR"
static PString okResponse = "+OK"

The documentation for this class was generated from the following files:

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