Пример #1
0
        // -------------------------- MessagePartSplitter -----------------------
        // input is an array holding the unfolded lines of the message.
        // Build and return a list of MimeMessagePart objects.  Each part object holds the
        // lines of a part of the message.
        // ( a part is either the header part or the boundary string delimited content parts.
        public static InMail.MimeMessagePartList MessagePartSplitter(string InStream)
        {
            InMail.MimeMessagePartList parts  = new InMail.MimeMessagePartList( );
            bool        currentlyBetweenParts = false;
            StringStack bdryStack             = new StringStack( );

            int    Ex   = -1;
            string line = null;

            MimeMessagePart.PartInProgress pip =
                new MimeMessagePart.PartInProgress(MimePartCode.Top);

            while (true)
            {
                // advance in string.
                int lineBx = Ex + 1;
                if (lineBx >= InStream.Length)
                {
                    break;
                }

                // the next line in the stream. recognize folds depending on if currently within
                // a part header or within the message lines of the part ( no folding there )
                if (pip.CurrentlyAmoungPropertyLines == true)
                {
                    IntStringPair rv = ScanEndUnfoldedLine(InStream, lineBx);
                    Ex   = rv.a;
                    line = rv.b;
                }
                else
                {
                    IntStringPair rv = ScanEndLine(InStream, lineBx);
                    Ex   = rv.a;
                    line = rv.b;
                }

                // calc what kind of a line in the mime document we have here.
                MimeLineCode lc = MimeParser.CalcLineCode(line, bdryStack.GetTop( ));
                if ((lc == MimeLineCode.Property) &&
                    (pip.CurrentlyAmoungMessageLines == true))
                {
                    lc = MimeLineCode.Text;
                }

                switch (lc)
                {
                case MimeLineCode.Property:
                {
                    StringPair propPair = MimeParser.SplitPropertyLine(line);

                    // the content-type property.  Could have an boundary="xxxxx" element.
                    // Boundary strings in a mime document have scope. That is, within one
                    // boundary ( section ) of the document, there can be sub boundaries
                    // ( sub sections )
                    if (propPair.a.ToLower( ) == "content-type")
                    {
                        PartProperty.ContentType ct =
                            MimeParser.ParseContentType(propPair.b);
                        if ((ct.Boundary != null) && (ct.Boundary != ""))
                        {
                            bdryStack.Push(ct.Boundary);
                        }
                    }
                    pip.AddLine(lineBx, line);
                    break;
                }

                // part boundary line. load the lines of the current part and reset the line
                // counter of this new part.
                case MimeLineCode.PartBdry:
                    if (pip.HasLines == true)
                    {
                        parts.AddNewPart(InStream, pip);
                    }
                    pip = new MimeMessagePart.PartInProgress(MimePartCode.Content);
                    currentlyBetweenParts = false;
                    break;

                case MimeLineCode.PartEndBdry:
                    if (pip.HasLines == true)
                    {
                        parts.AddNewPart(InStream, pip);
                    }
                    pip = new MimeMessagePart.PartInProgress(MimePartCode.Content);
                    if (bdryStack.IsNotEmpty)
                    {
                        bdryStack.Pop( );
                    }
                    currentlyBetweenParts = true;
                    break;

                // we have a line which is not a property line, not a boundary line.
                default:
                {
                    // just starting out.  discard the "+OK" response sent by the server immed
                    // before the start of the message.
                    if ((pip.PartCode == MimePartCode.Top) &&
                        (pip.PartIsJustStarting == true) &&
                        (line.Length >= 3) &&
                        (line.Substring(0, 3) == "+OK"))
                    {
                    }

                    // currently handling property lines.
                    else if (pip.CurrentlyAmoungPropertyLines == true)
                    {
                        // a blank line switches from property lines to message lines.
                        if (line.Length == 0)
                        {
                            pip.CurrentlyAmoungPropertyLines = false;
                            pip.CurrentlyAmoungMessageLines  = true;
                        }

                        // what is this text line doing amoung the property lines ??
                        // for now, just ignore it.
                        else
                        {
                        }
                    }

                    else if (currentlyBetweenParts == false)
                    {
                        pip.AddLine(lineBx, line);
                    }
                    break;
                }
                }
            }

            // load the lines of the final in progress part.
            if (pip.HasLines == true)
            {
                parts.AddNewPart(InStream, pip);
            }

            return(parts);
        }
Пример #2
0
        // -------------------------- MessagePartSplitter -----------------------
        // input is an array holding the unfolded lines of the message.
        // Build and return a list of MimeMessagePart objects.  Each part object holds the
        // lines of a part of the message.
        // ( a part is either the header part or the boundary string delimited content parts.
        public static InMail.MimeMessagePartList MessagePartSplitter(string[] InLines)
        {
            InMail.MimeMessagePartList parts   = new InMail.MimeMessagePartList( );
            int          curPartBx             = -1;
            int          curPartCx             = 0;
            MimePartCode curPartCode           = MimePartCode.Top;
            bool         currentlyBetweenParts = false;
            bool         partIsJustStarting    = true;
            StringStack  bdryStack             = new StringStack( );

            for (int Ix = 0; Ix < InLines.Length; ++Ix)
            {
                string       line = InLines[Ix];
                MimeLineCode lc   = MimeParser.CalcLineCode(line, bdryStack.GetTop( ));

                switch (lc)
                {
                case MimeLineCode.Property:
                {
                    StringPair propPair = MimeParser.SplitPropertyLine(line);

                    // the content-type property.  Could have an boundary="xxxxx" element.
                    // Boundary strings in a mime document have scope. That is, within one
                    // boundary ( section ) of the document, there can be sub boundaries
                    // ( sub sections )
                    if (propPair.a.ToLower( ) == "content-type")
                    {
                        PartProperty.ContentType ct =
                            MimeParser.ParseContentType(propPair.b);
                        if ((ct.Boundary != null) && (ct.Boundary != ""))
                        {
                            bdryStack.Push(ct.Boundary);
                        }
                    }
                    break;
                }

                // part boundary line. load the lines of the current part and reset the line
                // counter of this new part.
                case MimeLineCode.PartBdry:
                    if (curPartBx != -1)
                    {
                        parts.AddNewPart(curPartCode)
                        .LoadLines(InLines, curPartBx, curPartCx);
                    }
                    curPartCx             = 0;
                    curPartBx             = -1;
                    curPartCode           = MimePartCode.Content;
                    currentlyBetweenParts = false;
                    partIsJustStarting    = true;
                    break;

                case MimeLineCode.PartEndBdry:
                    if (curPartBx != -1)
                    {
                        parts.AddNewPart(curPartCode)
                        .LoadLines(InLines, curPartBx, curPartCx);
                    }
                    curPartCx = 0;
                    curPartBx = -1;
                    if (bdryStack.IsNotEmpty)
                    {
                        bdryStack.Pop( );
                    }
                    currentlyBetweenParts = true;
                    break;

                default:
                    break;
                }

                // add to range of lines in the current part.
                if ((currentlyBetweenParts == false) && (lc != MimeLineCode.PartBdry))
                {
                    if ((partIsJustStarting == true) && (line == ""))
                    {
                    }
                    else
                    {
                        ++curPartCx;
                        if (curPartBx == -1)
                        {
                            curPartBx = Ix;
                        }
                    }
                    partIsJustStarting = false;
                }
            }

            // load the lines of the final in progress part.
            if (curPartBx != -1)
            {
                parts.AddNewPart(curPartCode)
                .LoadLines(InLines, curPartBx, curPartCx);
            }

            return(parts);
        }