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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.Response;
interface
uses
DateTime.Calendar.Gregorian.Instant,
Http.CacheControl,
Http.ContentDisposition,
Http.ContentRange,
Http.Cookie,
Http.Header.Field,
Http.Message,
Http.Status.Line,
Http.Version,
Integer._32,
Stream.Input,
Stream.Output,
Text,
Uri;
type
THttpResponse = class(THttpMessage)
private
FLastModified: TGregorianInstant;
procedure SetLastModified(const Value: TGregorianInstant);
protected
procedure TranslateHeaderFields();
procedure CreateHeaderFromFields();
public
StatusLine: THttpStatusLine;
Location: TUri;
ContentDisposition: THttpContentDisposition;
SetCookies: THttpCookies;
WwwAuthenticate: TText;
Dav: TText;
ContentRange: THttpContentRange;
CacheControl: THttpCacheControl;
Server: TText; // TODO: We should introduce a special header object for this
constructor Create(); override;
destructor Destroy(); override;
procedure GenerateContent(); virtual;
function GetContentLength(): TInteger32; virtual;
procedure Read(Stream: TInputStream);
procedure Write(Stream: TOutputStream);
function GetVersion(): THttpVersion; override;
procedure TranslateHeaderField(Field: THttpHeaderField);
property LastModified: TGregorianInstant read FLastModified write SetLastModified;
end;
implementation
uses
Character.Encoding,
Http.Connection,
Http.DateTime.TextFormat,
Http.Header,
Http.Header.Reader,
Http.Status,
Http.TransferEncoding,
Integer._32.TextFormat,
Internet.MediaType,
Object_.List,
Text.Collation,
Text.Writer;
{ THttpResponse }
constructor THttpResponse.Create();
begin
inherited Create();
ContentLength := -1;
StatusLine := THttpStatusLine.Create();
StatusLine.Version.Major := 1;
StatusLine.Version.Minor := 1;
StatusLine.Status := THttpStatus.SuccessfulOk;
SetCookies := THttpCookies.Create();
SetCookies.DuplicatePolicy := hdcpException;
end;
procedure THttpResponse.GenerateContent();
begin
end;
procedure THttpResponse.CreateHeaderFromFields();
begin
Header := THttpHeader.Create();
Header.StartLine := StatusLine.ToText();
Header.Fields := TObjectList<THttpHeaderField>.Create();
if Server <> '' then
Header.Fields.Add(THttpHeaderField.Create('Server', Server));
if CacheControl <> nil then
Header.Fields.Add(THttpHeaderField.Create('Cache-Control', CacheControl.ToText()));
if Connection <> [] then
Header.Fields.Add(THttpHeaderField.Create('Connection', HttpConnectionToText(Connection)));
if Entity.ContentType <> nil then
Header.Fields.Add(THttpHeaderField.Create('Content-Type', Entity.ContentType.ToText()));
if Entity.ContentEncoding.Count > 0 then
Header.Fields.Add(THttpHeaderField.Create('Content-Encoding', Entity.ContentEncoding));
Header.Fields.Add(THttpHeaderField.Create('Content-Length', Integer32ToText(ContentLength)));
if ContentDisposition <> nil then
Header.Fields.Add(THttpHeaderField.Create('Content-Disposition', ContentDisposition.ToText()));
if not Location.IsEmpty then
Header.Fields.Add(THttpHeaderField.Create('Location', Location.ToText()));
if LastModified <> nil then
Header.Fields.Add(THttpHeaderField.Create('Last-Modified', GregorianInstantToHttpText(LastModified)));
if WwwAuthenticate <> '' then
Header.Fields.Add(THttpHeaderField.Create('WWW-Authenticate', WwwAuthenticate));
if Dav <> '' then
Header.Fields.Add(THttpHeaderField.Create('DAV', Dav));
if SetCookies.Count > 0 then
Header.Fields.Add(THttpHeaderField.Create('Set-Cookie', SetCookies.ToText(hctResponse)));
if ContentRange <> nil then
Header.Fields.Add(THttpHeaderField.Create('Content-Range', ContentRange.ToText()));
if LockToken <> '' then
Header.Fields.Add(THttpHeaderField.Create('Lock-Token', LockToken));
if TransferEncoding <> teNone then
Header.Fields.Add(THttpHeaderField.Create('Transfer-Encoding', TransferEncodingToText(TransferEncoding)));
end;
destructor THttpResponse.Destroy();
begin
SetCookies.Free();
ContentRange.Free();
ContentDisposition.Free();
CacheControl.Free();
StatusLine.Free();
LastModified.ReleaseReference();
inherited Destroy();
end;
function THttpResponse.GetContentLength(): TInteger32;
begin
Result := Entity.Content.GetByteCount();
end;
function THttpResponse.GetVersion(): THttpVersion;
begin
Result := StatusLine.Version;
end;
procedure THttpResponse.Read(Stream: TInputStream);
var
Reader: THttpHeaderReader;
begin
Reader := THttpHeaderReader.Create(Stream);
Header := Reader.Read();
StatusLine.SetFromText(Header.StartLine);
TranslateHeaderFields();
ReadEntity(Reader, Stream);
Reader.Free();
end;
procedure THttpResponse.SetLastModified(const Value: TGregorianInstant);
begin
if Value <> LastModified then
begin
Value.AddReference();
LastModified.ReleaseReference();
FLastModified := Value;
end;
end;
procedure THttpResponse.TranslateHeaderField(Field: THttpHeaderField);
var
Name: TText;
begin
Name := Field.Name;
if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Location') then
Location := TUri.New(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Connection') then
Connection := TextToHttpConnection(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Content-Type') then
Entity.ContentType := TMediaType.FromText(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Content-Disposition') then
ContentDisposition := THttpContentDisposition.FromText(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Content-Length') then
ContentLength := TextToInteger32(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Content-Range') then
ContentRange := THttpContentRange.FromText(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Transfer-Encoding') then
TransferEncoding := TextToTransferEncoding(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Set-Cookie') then
SetCookies.ParseFromResponse(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'DAV') then
Dav := Field.Value
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Lock-Token') then
LockToken := Field.Value
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Cache-Control') then
CacheControl := THttpCacheControl.FromText(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Server') then
Server := Field.Value
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Last-Modified') then
LastModified := HttpTextToGregorianInstant(Field.Value);
end;
procedure THttpResponse.TranslateHeaderFields();
var
i: TInteger32;
begin
for i := 0 to Header.Fields.Count - 1 do
TranslateHeaderField(Header.Fields[i]);
end;
procedure THttpResponse.Write(Stream: TOutputStream);
var
Writer: TTextWriter;
i: TInteger32;
begin
GenerateContent();
Writer := TTextWriter.Create(Stream, TCharacterEncoding.Iso8859_1, TText.CarriageReturnLineFeed);
try
if ContentLength = -1 then
ContentLength := GetContentLength();
CreateHeaderFromFields();
Writer.WriteLine(Header.StartLine);
for i := 0 to Header.Fields.Count - 1 do
Writer.WriteLine(Header.Fields[i].ToText());
Writer.WriteLine('');
Entity.Content.Write(Stream);
Stream.Flush();
finally
Writer.Free();
end;
end;
end.
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