www.pudn.com > pop3cli.zip > MIMEDMO1.PAS
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Author: François PIETTE
Object: This program is a demo for TMimeDecode component.
TMimeDecode is a component whose job is to decode MIME encoded
EMail messages (file attach). You can use it for example to
decode messages received with a POP3 component.
MIME is described in RFC-1521. headers are described if RFC-822.
Creation: March 08, 1998
Version: 1.02
EMail: francois.piette@pophost.eunet.be
francois.piette@rtfm.be http://www.rtfm.be/fpiette
Support: Use the mailing list twsocket@rtfm.be See website for details.
Legal issues: Copyright (C) 1998 by François PIETTE
Rue de Grady 24, 4053 Embourg, Belgium. Fax: +32-4-365.74.56
This software is provided 'as-is', without any express or
implied warranty. In no event will the author be held liable
for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it
and redistribute it freely, subject to the following
restrictions:
1. The origin of this software must not be misrepresented,
you must not claim that you wrote the original software.
If you use this software in a product, an acknowledgment
in the product documentation would be appreciated but is
not required.
2. Altered source versions must be plainly marked as such, and
must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
Updates:
Sep 13, 1998 V1.01 Added part and header end numbering
Feb 16/02/99 V1.02 In OnPartLine event handler, assemble line of text for
display.
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unit MimeDmo1;
interface
uses
WinTypes, WinProcs, Messages, SysUtils, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ExtCtrls, IniFiles, MimeDec;
type
TMimeDecodeForm = class(TForm)
Panel1: TPanel;
FileEdit: TEdit;
DecodeButton: TButton;
Memo1: TMemo;
MimeDecode1: TMimeDecode;
Label1: TLabel;
ClearButton: TButton;
procedure DecodeButtonClick(Sender: TObject);
procedure MimeDecode1PartBegin(Sender: TObject);
procedure MimeDecode1PartEnd(Sender: TObject);
procedure MimeDecode1PartHeaderLine(Sender: TObject);
procedure FormShow(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure FormCreate(Sender: TObject);
procedure ClearButtonClick(Sender: TObject);
procedure MimeDecode1HeaderLine(Sender: TObject);
procedure MimeDecode1PartLine(Sender: TObject; Data: PChar;
DataLen: Integer);
procedure MimeDecode1HeaderBegin(Sender: TObject);
procedure MimeDecode1HeaderEnd(Sender: TObject);
procedure MimeDecode1PartHeaderBegin(Sender: TObject);
procedure MimeDecode1PartHeaderEnd(Sender: TObject);
private
FInitialized : Boolean;
FIniFileName : String;
FLineBuf : array [0..255] of char;
FCharCnt : Integer;
procedure Display(Msg: String);
end;
var
MimeDecodeForm: TMimeDecodeForm;
implementation
{$R *.DFM}
const
SectionData = 'Data';
SectionWindow = 'Window';
KeyTop = 'Top';
KeyLeft = 'Left';
KeyWidth = 'Width';
KeyHeight = 'Height';
KeyFile = 'FileName';
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procedure TMimeDecodeForm.FormCreate(Sender: TObject);
begin
FIniFileName := LowerCase(ExtractFileName(Application.ExeName));
FIniFileName := Copy(FIniFileName, 1, Length(FIniFileName) - 3) + 'ini';
Memo1.Clear;
end;
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procedure TMimeDecodeForm.FormShow(Sender: TObject);
var
IniFile : TIniFile;
begin
if not FInitialized then begin
FInitialized := TRUE;
IniFile := TIniFile.Create(FIniFileName);
Top := IniFile.ReadInteger(SectionWindow, KeyTop, Top);
Left := IniFile.ReadInteger(SectionWindow, KeyLeft, Left);
Width := IniFile.ReadInteger(SectionWindow, KeyWidth, Width);
Height := IniFile.ReadInteger(SectionWindow, KeyHeight, Height);
FileEdit.Text := IniFile.ReadString(SectionData, KeyFile, '');
IniFile.Free;
end;
end;
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procedure TMimeDecodeForm.FormClose(Sender: TObject; var Action: TCloseAction);
var
IniFile : TIniFile;
begin
IniFile := TIniFile.Create(FIniFileName);
IniFile.WriteInteger(SectionWindow, KeyTop, Top);
IniFile.WriteInteger(SectionWindow, KeyLeft, Left);
IniFile.WriteInteger(SectionWindow, KeyWidth, Width);
IniFile.WriteInteger(SectionWindow, KeyHeight, Height);
IniFile.WriteString(SectionData, KeyFile, FileEdit.Text);
IniFile.Free;
end;
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procedure TMimeDecodeForm.DecodeButtonClick(Sender: TObject);
begin
Memo1.Clear;
MimeDecode1.DecodeFile(FileEdit.Text);
end;
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procedure TMimeDecodeForm.Display(Msg: String);
begin
{ TMemo cannot hold too much data. Limit to 400 lines }
if Memo1.Lines.count > 400 then
Memo1.Clear;
Memo1.Lines.Add(Msg);
end;
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procedure TMimeDecodeForm.MimeDecode1PartBegin(Sender: TObject);
begin
Display('--------- PART ' +
IntToStr(MimeDecode1.PartNumber) +
' BEGIN ----------');
FCharCnt := 0;
end;
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procedure TMimeDecodeForm.MimeDecode1PartEnd(Sender: TObject);
begin
if FCharCnt > 0 then begin
Display(StrPas(FLineBuf));
FCharCnt := 0;
end;
Display('--------- PART ' +
IntToStr(MimeDecode1.PartNumber) +
' END ----------');
end;
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{ Decoded data arrives here. This routine suppose that we have text data }
{ organized in lines. }
procedure TMimeDecodeForm.MimeDecode1PartLine(
Sender : TObject;
Data : PChar;
DataLen : Integer);
var
I : Integer;
begin
{ Copy data to LineBuf until CR/LF }
I := 0;
while (I < DataLen) do begin
if Data[I] = #13 then { Just ignre CR }
Inc(I)
else if Data[I] = #10 then begin { LF is end of line }
FLineBuf[FCharCnt] := #0;
Display(StrPas(FLineBuf));
FCharCnt := 0;
Inc(I);
end
else begin
FLineBuf[FCharCnt] := Data[I];
Inc(FCharCnt);
Inc(I);
end;
if FCharCnt >= (High(FLineBuf) - 1) then begin
{ Buffer overflow, display data accumulated so far }
FLineBuf[High(FLineBuf) - 1] := #0;
Display(StrPas(FLineBuf));
FCharCnt := 0;
end;
end;
end;
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procedure TMimeDecodeForm.MimeDecode1PartHeaderLine(Sender: TObject);
begin
Display('Part header: ' + StrPas(MimeDecode1.CurrentData));
end;
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procedure TMimeDecodeForm.ClearButtonClick(Sender: TObject);
begin
Memo1.Clear;
end;
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procedure TMimeDecodeForm.MimeDecode1HeaderLine(Sender: TObject);
begin
Display('Msg header: ' + StrPas(MimeDecode1.CurrentData));
end;
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procedure TMimeDecodeForm.MimeDecode1HeaderBegin(Sender: TObject);
begin
Display('--------- HEADER BEGIN ----------');
end;
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procedure TMimeDecodeForm.MimeDecode1HeaderEnd(Sender: TObject);
begin
Display('--------- HEADER END ----------');
end;
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procedure TMimeDecodeForm.MimeDecode1PartHeaderBegin(Sender: TObject);
begin
Display('--------- PART ' +
IntToStr(MimeDecode1.PartNumber) +
' HEADER BEGIN ----------');
end;
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procedure TMimeDecodeForm.MimeDecode1PartHeaderEnd(Sender: TObject);
begin
Display('--------- PART ' +
IntToStr(MimeDecode1.PartNumber) +
' HEADER END ----------');
end;
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end.