newshtm1.pas

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Author:       Fran鏾is PIETTE
Creation:     May 02, 2003
Description:  Simple program showing how to send a HTML news message using
              THtmlSmtCli component (ICS component family). The message can
              have embedded images or other type of documents or attached files.
Version:      1.00
EMail:        http://www.overbyte.be        http://www.rtfm.be/fpiette
              [e-mail]   [e-mail]
                                            [e-mail]
Support:      Use the mailing list [e-mail]
              Follow "support" link at http://www.overbyte.be for subscription.
Legal issues: Copyright (C) 2003-2005 by Fran鏾is PIETTE
              Rue de Grady 24, 4053 Embourg, Belgium. Fax: [phone]
              <[e-mail]>

              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.

              4. You must register this software by sending a picture postcard
                 to the author. Use a nice stamp and mention your name, street
                 address, EMail address and any comment you like to say.

History:


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unit NewsHtm1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  IniFiles, StdCtrls, ExtCtrls, NntpCli, MimeUtil;

type
  THtmlNewsForm = class(TForm)
    ToolsPanel: TPanel;
    DisplayMemo: TMemo;
    ServerEdit: TEdit;
    Label1: TLabel;
    Label4: TLabel;
    GroupEdit: TEdit;
    PostButton: TButton;
    SubjectEdit: TEdit;
    Label2: TLabel;
    HtmlNntpClient: THtmlNntpCli;
    Label3: TLabel;
    PortEdit: TEdit;
    Panel1: TPanel;
    PlainTextMemo: TMemo;
    ImageFilesMemo: TMemo;
    HtmlTextMemo: TMemo;
    Label5: TLabel;
    FromEdit: TEdit;
    Button1: TButton;
    procedure FormShow(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure FormCreate(Sender: TObject);
    procedure HtmlNntpClientRequestDone(Sender: TObject;
      RqType: TNntpRequest; ErrorCode: Word);
    procedure PostButtonClick(Sender: TObject);
    procedure HtmlNntpClientDisplay(Sender: TObject; MsgBuf: Pointer;
      MsgLen: Integer);
    procedure HtmlNntpClientSessionConnected(Sender: TObject;
      ErrCode: Word);
    procedure Button1Click(Sender: TObject);
  private
    FIniFileName : String;
    FInitialized : Boolean;
    FRunning     : Boolean;
  public
    procedure Display(Msg : String);
    property IniFileName : String read FIniFileName write FIniFileName;
  end;

var
  HtmlNewsForm: THtmlNewsForm;

implementation

{$R *.DFM}

const
    SectionWindow      = 'Window';
    KeyTop             = 'Top';
    KeyLeft            = 'Left';
    KeyWidth           = 'Width';
    KeyHeight          = 'Height';
    SectionData        = 'Data';
    KeyServer          = 'Server';
    KeyPort            = 'Port';
    KeyFrom            = 'From';
    KeyGroup           = 'Group';
    KeySubject         = 'Subject';
    SectionHtmlText    = 'HtmlText';
    KeyHtmlText        = 'Html';
    SectionPlainText   = 'PlainText';
    KeyPlainText       = 'Plain';
    SectionImageFiles  = 'ImageFiles';
    KeyImageFiles      = 'File';


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procedure SaveStringsToIniFile(
    const IniFileName : String;
    const IniSection  : String;
    const IniKey      : String;
    Strings           : TStrings);
var
    IniFile : TIniFile;
    nItem   : Integer;
begin
    if (IniFileName = '') or (IniSection = '') or (IniKey = '') or
       (not Assigned(Strings)) then
        Exit;
    IniFile := TIniFile.Create(IniFileName);
    IniFile.EraseSection(IniSection);
    if Strings.Count <= 0 then
        IniFile.WriteString(IniSection, IniKey + 'EmptyFlag', 'Empty')
    else
        for nItem := 0 to Strings.Count - 1 do
            IniFile.WriteString(IniSection,
                                IniKey + IntToStr(nItem),
                                Strings.Strings[nItem]);
    IniFile.Free;
end;


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{ Return FALSE if non existant in IniFile                                   }
function LoadStringsFromIniFile(
    const IniFileName : String;
    const IniSection  : String;
    const IniKey      : String;
    Strings           : TStrings) : Boolean;
var
    IniFile : TIniFile;
    nItem   : Integer;
    I       : Integer;
    Buf     : String;
begin
    Result := TRUE;
    if (IniFileName = '') or (IniSection = '') or (IniKey = '') or
       (not Assigned(Strings)) then
        Exit;
    Strings.Clear;
    IniFile := TIniFile.Create(IniFileName);
    try
        if IniFile.ReadString(IniSection, IniKey + 'EmptyFlag', '') <> '' then
             Exit;
        IniFile.ReadSectionValues(IniSection, Strings);
    finally
        IniFile.Free;
    end;
    nItem := Strings.Count - 1;
    while nItem >= 0 do begin
        Buf := Strings.Strings[nItem];
        if CompareText(IniKey, Copy(Buf, 1, Length(IniKey))) <> 0 then
            Strings.Delete(nItem)
        else begin
            if not (Buf[Length(IniKey) + 1] in ['0'..'9']) then
                Strings.Delete(nItem)
            else begin
                I := Pos('=', Buf);
                Strings.Strings[nItem] := Copy(Buf, I + 1, Length(Buf));
            end;
        end;
        Dec(nItem);
    end;
    Result := (Strings.Count <> 0);
end;


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procedure THtmlNewsForm.FormCreate(Sender: TObject);
begin
    FIniFileName := LowerCase(ExtractFileName(Application.ExeName));
    FIniFileName := Copy(FIniFileName, 1, Length(FIniFileName) - 3) + 'ini';
end;


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procedure THtmlNewsForm.FormShow(Sender: TObject);
var
    IniFile : TIniFile;
begin
    if not FInitialized then begin
        FInitialized := TRUE;

        IniFile      := TIniFile.Create(FIniFileName);