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{
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2009 by the Free Pascal development team
THTTPApplication class.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
{ $define CGIDEBUG}
{$mode objfpc}
{$H+}
unit custhttpapp;
Interface
uses
Classes, SysUtils, httpdefs, custweb, ssockets, fphttpserver;
Type
TCustomHTTPApplication = Class;
TFPHTTPServerHandler = Class;
{ TEmbeddedHttpServer }
TEmbeddedHttpServer = Class(TFPCustomHttpServer)
Private
FWebHandler: TFPHTTPServerHandler;
protected
Procedure InitRequest(ARequest : TFPHTTPConnectionRequest); override;
Procedure InitResponse(AResponse : TFPHTTPConnectionResponse); override;
Property WebHandler : TFPHTTPServerHandler Read FWebHandler;
Property Active;
end;
{ TFCgiHandler }
{ TFPHTTPServerHandler }
TFPHTTPServerHandler = class(TWebHandler)
Private
FOnRequestError: TRequestErrorHandler;
FServer: TEmbeddedHTTPServer;
function GetAllowConnect: TConnectQuery;
function GetAddress: string;
function GetPort: Word;
function GetQueueSize: Word;
function GetThreaded: Boolean;
procedure SetOnAllowConnect(const AValue: TConnectQuery);
procedure SetAddress(const AValue: string);
procedure SetPort(const AValue: Word);
procedure SetQueueSize(const AValue: Word);
procedure SetThreaded(const AValue: Boolean);
function GetLookupHostNames : Boolean;
Procedure SetLookupHostnames(Avalue : Boolean);
protected
procedure HTTPHandleRequest(Sender: TObject; var ARequest: TFPHTTPConnectionRequest; var AResponse: TFPHTTPConnectionResponse); virtual;
procedure HandleRequestError(Sender: TObject; E: Exception); virtual;
Procedure InitRequest(ARequest : TRequest); override;
Procedure InitResponse(AResponse : TResponse); override;
function WaitForRequest(out ARequest : TRequest; out AResponse : TResponse) : boolean; override;
Function CreateServer : TEmbeddedHttpServer; virtual;
Property HTTPServer : TEmbeddedHttpServer Read FServer;
Public
Procedure Run; override;
Procedure Terminate; override;
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
// Address to listen on.
Property Address : string Read GetAddress Write SetAddress;
// Port to listen on.
Property Port : Word Read GetPort Write SetPort Default 80;
// Max connections on queue (for Listen call)
Property QueueSize : Word Read GetQueueSize Write SetQueueSize Default 5;
// Called when deciding whether to accept a connection.
Property OnAllowConnect : TConnectQuery Read GetAllowConnect Write SetOnAllowConnect;
// Use a thread to handle a connection ?
property Threaded : Boolean read GetThreaded Write SetThreaded;
// Handle On Request error. If not set, error is logged.
Property OnRequestError : TRequestErrorHandler Read FOnRequestError Write FOnRequestError;
// Should addresses be matched to hostnames ? (expensive)
Property LookupHostNames : Boolean Read GetLookupHostNames Write SetLookupHostNames;
end;
{ TCustomHTTPApplication }
TCustomHTTPApplication = Class(TCustomWebApplication)
private
function GetLookupHostNames : Boolean;
Procedure SetLookupHostnames(Avalue : Boolean);
function GetAllowConnect: TConnectQuery;
function GetAddress: String;
function GetPort: Word;
function GetQueueSize: Word;
function GetThreaded: Boolean;
procedure SetOnAllowConnect(const AValue: TConnectQuery);
procedure SetAddress(const AValue: string);
procedure SetPort(const AValue: Word);
procedure SetQueueSize(const AValue: Word);
procedure SetThreaded(const AValue: Boolean);
protected
function InitializeWebHandler: TWebHandler; override;
Function HTTPHandler : TFPHTTPServerHandler;
Public
Property Address : string Read GetAddress Write SetAddress;
Property Port : Word Read GetPort Write SetPort Default 80;
// Max connections on queue (for Listen call)
Property QueueSize : Word Read GetQueueSize Write SetQueueSize Default 5;
// Called when deciding whether to accept a connection.
Property OnAllowConnect : TConnectQuery Read GetAllowConnect Write SetOnAllowConnect;
// Use a thread to handle a connection ?
property Threaded : Boolean read GetThreaded Write SetThreaded;
// Should addresses be matched to hostnames ? (expensive)
Property LookupHostNames : Boolean Read GetLookupHostNames Write SetLookupHostNames;
end;
Implementation
{ TEmbeddedHttpServer }
procedure TEmbeddedHttpServer.InitRequest(ARequest: TFPHTTPConnectionRequest);
begin
WebHandler.InitRequest(ARequest);
end;
procedure TEmbeddedHttpServer.InitResponse(AResponse: TFPHTTPConnectionResponse
);
begin
WebHandler.InitResponse(AResponse);
end;
{$ifdef CGIDEBUG}
uses
dbugintf;
{$endif}
{ TCustomHTTPApplication }
function TCustomHTTPApplication.GetLookupHostNames : Boolean;
begin
Result:=HTTPHandler.LookupHostNames;
end;
Procedure TCustomHTTPApplication.SetLookupHostnames(Avalue : Boolean);
begin
HTTPHandler.LookupHostNames:=AValue;
end;
function TCustomHTTPApplication.GetAllowConnect: TConnectQuery;
begin
Result:=HTTPHandler.OnAllowConnect;
end;
function TCustomHTTPApplication.GetAddress: String;
begin
Result:=HTTPHandler.Address;
end;
function TCustomHTTPApplication.GetPort: Word;
begin
Result:=HTTPHandler.Port;
end;
function TCustomHTTPApplication.GetQueueSize: Word;
begin
Result:=HTTPHandler.QueueSize;
end;
function TCustomHTTPApplication.GetThreaded: Boolean;
begin
Result:=HTTPHandler.Threaded;
end;
procedure TCustomHTTPApplication.SetOnAllowConnect(const AValue: TConnectQuery);
begin
HTTPHandler.OnAllowConnect:=AValue;
end;
procedure TCustomHTTPApplication.SetAddress(const AValue: string);
begin
HTTPHandler.Address:=Avalue;
end;
procedure TCustomHTTPApplication.SetPort(const AValue: Word);
begin
HTTPHandler.Port:=Avalue;
end;
procedure TCustomHTTPApplication.SetQueueSize(const AValue: Word);
begin
HTTPHandler.QueueSize:=Avalue;
end;
procedure TCustomHTTPApplication.SetThreaded(const AValue: Boolean);
begin
HTTPHandler.Threaded:=Avalue;
end;
function TCustomHTTPApplication.InitializeWebHandler: TWebHandler;
begin
Result:=TFPHTTPServerHandler.Create(Self);
end;
function TCustomHTTPApplication.HTTPHandler: TFPHTTPServerHandler;
begin
Result:=Webhandler as TFPHTTPServerHandler;
end;
{ TFPHTTPServerHandler }
procedure TFPHTTPServerHandler.HandleRequestError(Sender: TObject; E: Exception
);
begin
Try
If Assigned(FOnRequestError) then
FOnRequestError(Sender,E)
else
Log(etError,Format('Error (%s) handling request : %s',[E.ClassName,E.Message]));
except
// Do not let errors escape
end;
end;
procedure TFPHTTPServerHandler.HTTPHandleRequest(Sender: TObject;
var ARequest: TFPHTTPConnectionRequest;
var AResponse: TFPHTTPConnectionResponse);
begin
// Exceptions are handled by (Do)HandleRequest. It also frees the response/request
try
DoHandleRequest(ARequest,AResponse);
finally
ARequest:=Nil;
AResponse:=Nil;
end;
if Assigned(OnIdle) then
OnIdle(Self);
end;
function TFPHTTPServerHandler.GetLookupHostNames : Boolean;
begin
Result:=FServer.LookupHostNames;
end;
Procedure TFPHTTPServerHandler.SetLookupHostnames(Avalue : Boolean);
begin
FServer.LookupHostNames:=AValue;
end;
function TFPHTTPServerHandler.GetAllowConnect: TConnectQuery;
begin
Result:=FServer.OnAllowConnect;
end;
function TFPHTTPServerHandler.GetAddress: string;
begin
Result:=FServer.Address;
end;
function TFPHTTPServerHandler.GetPort: Word;
begin
Result:=FServer.Port;
end;
function TFPHTTPServerHandler.GetQueueSize: Word;
begin
Result:=FServer.QueueSize;
end;
function TFPHTTPServerHandler.GetThreaded: Boolean;
begin
Result:=FServer.Threaded;
end;
procedure TFPHTTPServerHandler.SetOnAllowConnect(const AValue: TConnectQuery);
begin
FServer.OnAllowConnect:=Avalue
end;
procedure TFPHTTPServerHandler.SetAddress(const AValue: string);
begin
FServer.Address:=AValue
end;
procedure TFPHTTPServerHandler.SetPort(const AValue: Word);
begin
FServer.Port:=Avalue
end;
procedure TFPHTTPServerHandler.SetQueueSize(const AValue: Word);
begin
FServer.QueueSize:=Avalue
end;
procedure TFPHTTPServerHandler.SetThreaded(const AValue: Boolean);
begin
FServer.Threaded:=AValue;
end;
procedure TFPHTTPServerHandler.InitRequest(ARequest: TRequest);
begin
inherited InitRequest(ARequest);
end;
procedure TFPHTTPServerHandler.InitResponse(AResponse: TResponse);
begin
inherited InitResponse(AResponse);
end;
function TFPHTTPServerHandler.WaitForRequest(out ARequest: TRequest;
out AResponse: TResponse): boolean;
begin
Result:=False;
ARequest:=Nil;
AResponse:=Nil;
end;
function TFPHTTPServerHandler.CreateServer: TEmbeddedHttpServer;
begin
Result:=TEmbeddedHttpServer.Create(Self);
end;
procedure TFPHTTPServerHandler.Run;
begin
Fserver.Active:=True;
end;
procedure TFPHTTPServerHandler.Terminate;
begin
Inherited;
if Assigned(FServer) then
Fserver.Active:=False;
end;
constructor TFPHTTPServerHandler.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FServer:=CreateServer;
FServer.FWebHandler:=Self;
FServer.OnRequest:=@HTTPHandleRequest;
Fserver.OnRequestError:=@HandleRequestError;
end;
destructor TFPHTTPServerHandler.Destroy;
begin
if Assigned(FServer) then
begin
FServer.Active:=False;
FreeAndNil(FServer);
end;
inherited Destroy;
end;
end.
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