{*_* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Author: François PIETTE Object: This demo shows how to use THttpCli component within a console mode application. It Connect to www.borland.com and display received (default) document on screen. Creation: Apr 20, 2002 Version: 6.00 EMail: http://www.overbyte.be francois.piette@overbyte.be Support: Use the mailing list twsocket@elists.org Follow "support" link at http://www.overbyte.be for subscription. Legal issues: Copyright (C) 2002-2008 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. 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. Updates: Jul 12, 2008 V6.00 A. Garrels - Bumped version number to 6.00 and slightly modified to work with ICS v6. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *} program OverbyteIcsConHttp; {$I OVERBYTEICSDEFS.INC} {$IFDEF VER80} Bomb('Sorry, Delphi 1 does not support console mode programs'); {$ENDIF} {$APPTYPE CONSOLE} {$IFNDEF NOFORMS} Bomb('Please add NOFORMS to your project defines'); {$ENDIF} uses Messages, Windows, SysUtils, Classes, OverbyteIcsHttpProt; const ConHttpVersion = 600; CopyRight = ' ConHttp (c) 2002-2008 by Francois PIETTE. V6.00'; type { We use TConApplication class (actually a component) to encapsulate all } { the work to be done. This is easier because THttpCli is event driven } { and need methods (that is procedure of object) to handle events. } TConApplication = class(TComponent) protected FHttpCli : THttpCli; procedure HttpRequestDone(Sender : TObject; RqType : THttpRequest; ErrorCode : Word); procedure HttpDocData(Sender : TObject; Buffer : Pointer; Len : Integer); public constructor Create(AOwner: TComponent); override; destructor Destroy; override; procedure Execute; end; {* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *} constructor TConApplication.Create(AOwner: TComponent); begin inherited Create(AOwner); FHttpCli := THttpCli.Create(Self); end; {* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *} destructor TConApplication.Destroy; begin if Assigned(FHttpCli) then begin FHttpCli.Destroy; FHttpCli := nil; end; inherited Destroy; end; {* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *} procedure TConApplication.Execute; var Url : String; begin Url := 'http://www.borland.com'; WriteLn('Querying ' + Url); FHttpCli.URL := Url; FHttpCli.OnRequestDone := HttpRequestDone; FHttpCli.OnDocData := HttpDocData; FHttpCli.GetASync; { We need a message loop in order for windows message processing to work. } { There is a message loop built into each TWSocket, so we use the one in } { THttpCli control socket. } { MessageLoop will exit only when WM_QUIT message is posted. We do that } { form the OnRequestDone event handler when the component has finished. } FHttpCli.CtrlSocket.MessageLoop; WriteLn('Going back to the OS'); end; {* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *} { This event handler is called each time THttpCli receive document data. } procedure TConApplication.HttpDocData( Sender : TObject; Buffer : Pointer; Len : Integer); begin while Len > 0 do begin { While we have bytes... } Write(PChar(Buffer)^); { Write to standard output } Buffer := PChar(Buffer) + 1; { Skip to next byte } Len := Len - 1; { Count down the byte } end; end; {* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *} { This event handler is called when THttpCli has finihed his work. } procedure TConApplication.HttpRequestDone( Sender : TObject; RqType : THttpRequest; ErrorCode : Word); begin { Check status } if ErrorCode <> 0 then WriteLn('Failed, error #' + IntToStr(ErrorCode)) else WriteLn('Done.'); { Prompt the user } WriteLn('Hit ENTER key to return quit program...'); ReadLn; { Break message loop we called from the execute method } PostMessage(FHttpCli.CtrlSocket.Handle, WM_QUIT, 0, 0); end; {* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *} var ConApp : TConApplication; begin WriteLn(CopyRight); WriteLn; ConApp := TConApplication.Create(nil); try ConApp.Execute; finally ConApp.Destroy; end; end.