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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.Request;
interface
uses
Boolean,
Collection.List,
DateTime.Calendar.Gregorian.Instant,
Http.Authorization,
Http.Cookie,
Http.Depth,
Http.Header.Field,
Http.Message,
Http.Range,
Http.Request.Line,
Http.Version,
Internet.MediaType,
Socket.Established,
Stream.Input,
Stream.Output,
Text,
Uri;
type
THttpRequest = class(THttpMessage)
private
FIfModifiedSince: TGregorianInstant;
procedure SetIfModifiedSince(const Value: TGregorianInstant);
protected
procedure TranslateHeaderField(Field: THttpHeaderField);
procedure TranslateHeaderFields();
procedure ParseAcceptField(Value: TText);
public
ClientSocket: TEstablishedSocket;
RequestLine: THttpRequestLine;
Host: TUriAuthority;
Authorization: THttpAuthorization;
Referer: TUri;
Accept: TList<TMediaType>;
AcceptEncoding: TText;
KeepAlive: TText;
UserAgent: TText;
Cookies: THttpCookies;
Depth: THttpDepth;
Range: THttpRange;
Destination: TUri;
Overwrite: TBoolean;
constructor Create(); override;
destructor Destroy(); override;
procedure Read(Stream: TInputStream);
procedure Write(Stream: TOutputStream);
function GetVersion(): THttpVersion; override;
property IfModifiedSince: TGregorianInstant read FIfModifiedSince write SetIfModifiedSince;
end;
implementation
uses
Character.Encoding,
Http.Connection,
Http.DateTime.TextFormat,
Http.Header.Reader,
Http.TransferEncoding,
Integer._32,
Integer._32.TextFormat,
Object_.List,
Object_.Reference.Counter,
Stream,
Text.Collation,
Text.Writer;
{ THttpRequest }
constructor THttpRequest.Create();
begin
inherited Create();
Cookies := THttpCookies.Create();
Cookies.DuplicatePolicy := hdcpFree;
Host := TUriAuthority.New();
Overwrite := True;
Accept := TObjectList<TMediaType>.Create();
Accept.ElementManager := TReferenceCounter<TMediaType>.Create();
RequestLine := THttpRequestLine.Create();
RequestLine.Version.Major := 1;
RequestLine.Version.Minor := 1;
end;
destructor THttpRequest.Destroy();
begin
IfModifiedSince.ReleaseReference();
Cookies.Free();
Range.Free();
Accept.Free();
RequestLine.Free();
Authorization.Free();
inherited Destroy();
end;
function THttpRequest.GetVersion(): THttpVersion;
begin
Result := RequestLine.Version;
end;
procedure THttpRequest.ParseAcceptField(Value: TText);
var
MediaType: TMediaType;
begin
while Value.Count > 0 do
begin
MediaType := TMediaType.FromText(Value.Parse(','));
if MediaType <> nil then
Accept.Add(MediaType);
end;
end;
procedure THttpRequest.Read(Stream: TInputStream);
var
Reader: THttpHeaderReader;
begin
Reader := THttpHeaderReader.Create(Stream);
Header := Reader.Read();
RequestLine.SetFromText(Header.StartLine);
TranslateHeaderFields();
ReadEntity(Reader, Stream);
Reader.Free();
end;
procedure THttpRequest.SetIfModifiedSince(const Value: TGregorianInstant);
begin
if Value <> IfModifiedSince then
begin
Value.AddReference();
IfModifiedSince.ReleaseReference();
FIfModifiedSince := Value;
end;
end;
procedure THttpRequest.TranslateHeaderField(Field: THttpHeaderField);
var
Name: TText;
begin
Name := Field.Name;
if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Host') then
Host := TUriAuthority.NewFromText(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Referer') then
Referer := TUri.New(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Connection') then
Connection := TextToHttpConnection(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Content-Length') then
ContentLength := TextToInteger32(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Content-Type') then
Entity.ContentType := TMediaType.FromText(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Cookie') then
Cookies.ParseFromRequest(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Keep-Alive') then
KeepAlive := Field.Value
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Accept') then
ParseAcceptField(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Accept-Encoding') then
AcceptEncoding := Field.Value // TODO: Accept-Encoding follows a specific format and is not plain text
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'User-Agent') then
UserAgent := Field.Value
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'If-Modified-Since') then
IfModifiedSince := HttpTextToGregorianInstant(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Depth') then
Depth := TextToHttpDepth(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Authorization') then
Authorization := THttpAuthorization.FromText(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Range') then
Range := THttpRange.FromText(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Lock-Token') then
LockToken := Field.Value
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Destination') then
Destination := TUri.New(Field.Value)
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Overwrite') then
Overwrite := Field.Value = 'T' // TODO: we should check whether a valid value is specified because the only other value allowed is 'F' which means False
else if TTextCollation.DefaultCaseInsensitive.Equal(Name, 'Transfer-Encoding') then
TransferEncoding := TextToTransferEncoding(Field.Value);
end;
procedure THttpRequest.TranslateHeaderFields();
var
i: TInteger32;
begin
for i := 0 to Header.Fields.Count - 1 do
TranslateHeaderField(Header.Fields[i]);
end;
procedure THttpRequest.Write(Stream: TOutputStream);
var
Writer: TTextWriter;
ContentStream: TInputStream;
Index: TInteger32;
begin
Writer := TTextWriter.Create(Stream, TCharacterEncoding.Iso8859_1, TText.CarriageReturnLineFeed);
Writer.WriteLine(RequestLine.ToText());
if not Host.IsEmpty() then
Writer.WriteLine('Host: ' + Host.ToText())
else
Writer.WriteLine('Host: ' + RequestLine.RequestUri.Authority.HostName);
if Entity.ContentType <> nil then
Writer.WriteLine('Content-Type: ' + Entity.ContentType.ToText());
if Entity.ContentEncoding.Count > 0 then
Writer.WriteLine('Content-Encoding: ' + Entity.ContentEncoding);
if ContentLength > 0 then
Writer.WriteLine('Content-Length: ' + Integer32ToText(ContentLength));
if Accept.Count > 0 then
begin
// TODO: Currently we ignore the parameters of media types.
Writer.Write('Accept: ');
for Index := 0 to Accept.Count - 2 do
begin
Writer.Write(Accept[Index].ToText());
Writer.Write(',');
end;
Writer.WriteLine(Accept.Last.ToText());
end;
if AcceptEncoding <> '' then
Writer.WriteLine('Accept-Encoding: ' + AcceptEncoding);
if Authorization <> nil then
Writer.WriteLine('Authorization: ' + Authorization.ToText());
if not Referer.IsEmpty then
Writer.WriteLine('Referer: ' + Referer.ToText());
if Cookies.Count > 0 then
Writer.WriteLine('Cookie: ' + Cookies.ToText(hctRequest));
if UserAgent <> '' then
Writer.WriteLine('User-Agent: ' + UserAgent);
if KeepAlive <> '' then
Writer.WriteLine('Keep-Alive: ' + KeepAlive);
if IfModifiedSince <> nil then
Writer.WriteLine('If-Modified-Since: ' + GregorianInstantToHttpText(IfModifiedSince));
if LockToken <> '' then
Writer.WriteLine('Lock-Token: ' + LockToken);
if not Destination.IsEmpty() then
Writer.WriteLine('Destination: ' + Destination.ToText());
if not Overwrite then
Writer.WriteLine('Overwrite: F');
if Connection <> [] then
Writer.WriteLine('Connection: ' + HttpConnectionToText(Connection));
if TransferEncoding <> teNone then
Writer.WriteLine('Transfer-Encoding: ' + TransferEncodingToText(TransferEncoding));
if Range <> nil then
Writer.WriteLine('Range: ' + Range.ToText());
Writer.WriteLine('');
Writer.Free();
if ContentLength > 0 then
begin
ContentStream := Entity.Content.CreateInputStream();
CopyStream(ContentStream, Stream, ContentLength);
ContentStream.Free();
end;
Stream.Flush();
end;
end.
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