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| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit Http.Message;
interface
uses
Http.Connection,
Http.Header,
Http.Header.Reader,
Http.TransferEncoding,
Http.Version,
Integer._32,
Internet.Entity,
Object_.ReferenceCounted,
Stream.Input,
Stream.Output,
Text;
type
THttpMessage = class(TReferenceCountedObject)
private
FHeader: THttpHeader;
FEntity: TInternetEntity;
protected
procedure ReadChunkedContent(Reader: THttpHeaderReader; Source: TInputStream; Target: TOutputStream);
procedure ReadContentUntilClose(Source: TInputStream; Target: TOutputStream);
procedure ReadEntity(Reader: THttpHeaderReader; Stream: TInputStream);
public
Connection: THttpConnection;
ContentLength: TInteger32;
LockToken: TText;
TransferEncoding: TTransferEncoding;
constructor Create(); override;
destructor Destroy(); override;
function ToText(): TText; override;
function GetVersion(): THttpVersion; virtual; abstract;
published
property Header: THttpHeader read FHeader write FHeader;
property Entity: TInternetEntity read FEntity;
end;
implementation
uses
Exception,
Mathematics.Sign,
Numeral.System.Hexadecimal,
Stream;
{ THttpMessage }
constructor THttpMessage.Create();
begin
inherited Create();
FEntity := TInternetEntity.Create();
end;
destructor THttpMessage.Destroy();
begin
Header.Free();
Entity.Free();
inherited Destroy();
end;
procedure THttpMessage.ReadChunkedContent(Reader: THttpHeaderReader; Source: TInputStream; Target: TOutputStream);
var
Line: TText;
ChunkSize: TInteger32;
begin
ContentLength := 0;
repeat
Line := Reader.ReadLine();
ChunkSize := HexadecimalToPositiveInteger32(Line.Parse(' ')); // TODO: We ignore chunk-extensions now
if ChunkSize > 0 then
begin
CopyStream(Source, Target, ChunkSize);
Reader.ReadLine();
Inc(ContentLength, ChunkSize);
end;
until ChunkSize = 0;
repeat
// TODO: We skip the trailer for now, do we need it ever?
Line := Reader.ReadLine();
until Line = '';
end;
procedure THttpMessage.ReadContentUntilClose(Source: TInputStream; Target: TOutputStream);
begin
while not Source.AtEnd() do
CopyStream(Source, Target, Source.Available());
end;
procedure THttpMessage.ReadEntity(Reader: THttpHeaderReader; Stream: TInputStream);
var
ContentStream: TOutputStream;
begin
Entity.Content.Clear();
if TransferEncoding <> teNone then
begin
if TransferEncoding = teChunked then
begin
ContentStream := Entity.Content.CreateAppendStream();
ReadChunkedContent(Reader, Stream, ContentStream);
ContentStream.Free();
end
else
raise EException.Create('Unsupported transfer encoding: ' + TransferEncodingToText(TransferEncoding));
end
else if ContentLength <> -1 then
begin
Entity.Content.SetByteCount(ContentLength);
Entity.Content.Read(Stream);
end
else if (THttpVersion.Compare(THttpVersion._1_0, GetVersion()) = sZero) or (hcClose in Connection) then
begin
ContentStream := Entity.Content.CreateAppendStream();
ReadContentUntilClose(Stream, ContentStream);
ContentStream.Free();
end;
end;
function THttpMessage.ToText(): TText;
begin
Result := Header.StartLine;
end;
end.
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