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(* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is TurboPower Internet Professional
*
* The Initial Developer of the Original Code is
* TurboPower Software
*
* Portions created by the Initial Developer are Copyright (C) 2000-2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Silvio Clecio - https://github.com/silvioprog
*
* ***** END LICENSE BLOCK ***** *)
(* Part of Ipbroker.pas allowing to use online files Silvio Clecio Jan 2016 *)
unit Iphttpbroker;
{$I ipdefine.inc}
interface
uses
IpFileBroker, FPHttpClient, IpMsg, IpUtils, IpHtml, Graphics, Classes;
type
{ TIpHttpClient }
TIpHttpClient = class(TFPHTTPClient)
end;
{ TIpHttpDataProvider }
TIpHttpDataProvider = class(TIpCustomHtmlDataProvider)
private
FClient: TIpHttpClient;
FDocumment: TMemoryStream;
FContentType: string;
protected
property Documment: TMemoryStream read FDocumment;
property Client: TIpHttpClient read FClient;
public
constructor Create(AOwner : TComponent); override;
destructor Destroy; override;
function GetHtmlStream(const AUrl: string;
APostData: TIpFormDataEntity): TStream; override;
function DoGetStream(const AUrl: string): TStream; override;
function CheckURL(const AUrl: string;
var AContentType: string): Boolean; override;
procedure Leave(AHtml: TIpHtml); override;
procedure Reference(const AUrl: string); override;
procedure GetImage(ASender: TIpHtmlNode; const AUrl: string;
var APicture: TPicture); override;
function CanHandle(const AUrl: string): Boolean; override;
end;
procedure Register;
implementation
{ TIpHttpDataProvider }
constructor TIpHttpDataProvider.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FClient := TIpHttpClient.Create(nil);
FDocumment := TMemoryStream.Create;
HandledProtocols.Add('HTTP');
FClient.ResponseHeaders.NameValueSeparator := ':';
FClient.AllowRedirect := True;
FClient.MaxRedirects := High(Byte);
end;
destructor TIpHttpDataProvider.Destroy;
begin
FDocumment.Free;
FClient.Free;
inherited Destroy;
end;
function TIpHttpDataProvider.GetHtmlStream(const AUrl: string;
APostData: TIpFormDataEntity): TStream;
begin
Result := TMemoryStream.Create;
Result.CopyFrom(FDocumment, 0);
Result.Seek(0, soFromBeginning);
end;
function TIpHttpDataProvider.DoGetStream(const AUrl: string): TStream;
begin
Result := TMemoryStream.Create;
Result.CopyFrom(FDocumment, 0);
Result.Seek(0, soFromBeginning);
end;
function TIpHttpDataProvider.CheckURL(const AUrl: string;
var AContentType: string): Boolean;
var
VAddrRec: TIpAddrRec;
begin
VAddrRec := Default(TIpAddrRec);
Initialize(VAddrRec);
try
IpParseURL(AUrl, VAddrRec);
FDocumment.Clear;
FClient.Get(AUrl, FDocumment);
Result := (FClient.ResponseStatusCode = 200)
or FClient.IsRedirect(FClient.ResponseStatusCode);
if Result then
begin
FContentType := AllTrimSpaces(FClient.ResponseHeaders.Values['Content-Type']);
AContentType := FContentType;
end;
finally
Finalize(VAddrRec);
end;
end;
procedure TIpHttpDataProvider.Leave(AHtml: TIpHtml);
begin
inherited Leave(AHtml);
end;
procedure TIpHttpDataProvider.Reference(const AUrl: string);
begin
inherited Reference(AUrl);
end;
procedure TIpHttpDataProvider.GetImage(ASender: TIpHtmlNode;
const AUrl: string; var APicture: TPicture);
var
VImgRaw: TStream;
begin
APicture := nil;
VImgRaw := TMemoryStream.Create;
try
FClient.Get(AUrl, VImgRaw);
if (FClient.ResponseStatusCode = 200) and
(Pos('image/', FClient.ResponseHeaders.Values['Content-Type']) > 0) then
try
VImgRaw.Seek(0, soFromBeginning);
APicture := TPicture.Create;
APicture.LoadFromStream(VImgRaw);
except
on EInvalidGraphic do
begin
APicture.Free;
APicture := nil;
end;
end;
finally
VImgRaw.Free;
end;
end;
function TIpHttpDataProvider.CanHandle(const AUrl: string): Boolean;
begin
Result := Assigned(FDocumment) and ((Pos('text/html', FContentType) > 0) or
(Pos('image/', FContentType) > 0));
end;
procedure Register;
begin
RegisterComponents('IPro', [TIpHttpDataProvider]);
end;
end.
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