mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-07-29 05:26:24 +02:00
638 lines
22 KiB
ObjectPascal
638 lines
22 KiB
ObjectPascal
{
|
|
$Id$
|
|
|
|
HTTP: Classes for dealing with HTTP requests
|
|
Copyright (C) 2000 by Sebastian Guenther (sg@freepascal.org)
|
|
|
|
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.
|
|
}
|
|
|
|
|
|
{$MODE objfpc}
|
|
{$H+}
|
|
|
|
unit HTTP;
|
|
|
|
interface
|
|
|
|
uses Classes, AsyncIO, SSockets;
|
|
|
|
const
|
|
|
|
fieldAccept = 'Accept';
|
|
fieldAcceptCharset = 'Accept-Charset';
|
|
fieldAcceptEncoding = 'Accept-Encoding';
|
|
fieldAcceptLanguage = 'Accept-Language';
|
|
fieldAuthorization = 'Authorization';
|
|
fieldContentEncoding = 'Content-Encoding';
|
|
fieldContentLanguage = 'Content-Language';
|
|
fieldContentLength = 'Content-Length';
|
|
fieldContentType = 'Content-Type';
|
|
fieldCookie = 'Cookie';
|
|
fieldDate = 'Date';
|
|
fieldExpires = 'Expires';
|
|
fieldFrom = 'From';
|
|
fieldIfModifiedSince = 'If-Modified-Since';
|
|
fieldLastModified = 'Last-Modified';
|
|
fieldLocation = 'Location';
|
|
fieldPragma = 'Pragma';
|
|
fieldReferer = 'Referer';
|
|
fieldRetryAfter = 'Retry-After';
|
|
fieldServer = 'Server';
|
|
fieldSetCookie = 'Set-Cookie';
|
|
fieldUserAgent = 'User-Agent';
|
|
fieldWWWAuthenticate = 'WWW-Authenticate';
|
|
|
|
type
|
|
|
|
PHttpField = ^THttpField;
|
|
THttpField = record
|
|
Name, Value: String;
|
|
end;
|
|
|
|
|
|
THttpHeader = class
|
|
protected
|
|
FReader: TAsyncStreamLineReader;
|
|
FWriter: TAsyncWriteStream;
|
|
FOnCompleted: TNotifyEvent;
|
|
FFields: TList;
|
|
CmdReceived: Boolean;
|
|
|
|
procedure ParseFirstHeaderLine(const line: String); virtual; abstract;
|
|
procedure LineReceived(const line: String);
|
|
function GetFirstHeaderLine: String; virtual; abstract;
|
|
procedure WriterCompleted(ASender: TObject);
|
|
|
|
function GetFieldCount: Integer;
|
|
function GetFields(AIndex: Integer): String;
|
|
function GetFieldNames(AIndex: Integer): String;
|
|
procedure SetFieldNames(AIndex: Integer; const AName: String);
|
|
function GetFieldValues(AIndex: Integer): String;
|
|
procedure SetFieldValues(AIndex: Integer; const AValue: String);
|
|
|
|
|
|
function GetAccept: String;
|
|
procedure SetAccept(const AValue: String);
|
|
function GetAcceptCharset: String;
|
|
procedure SetAcceptCharset(const AValue: String);
|
|
function GetAcceptEncoding: String;
|
|
procedure SetAcceptEncoding(const AValue: String);
|
|
function GetAcceptLanguage: String;
|
|
procedure SetAcceptLanguage(const AValue: String);
|
|
function GetAuthorization: String;
|
|
procedure SetAuthorization(const AValue: String);
|
|
function GetContentEncoding: String;
|
|
procedure SetContentEncoding(const AValue: String);
|
|
function GetContentLanguage: String;
|
|
procedure SetContentLanguage(const AValue: String);
|
|
function GetContentLength: Integer;
|
|
procedure SetContentLength(AValue: Integer);
|
|
function GetContentType: String;
|
|
procedure SetContentType(const AValue: String);
|
|
function Get_Cookie: String;
|
|
procedure Set_Cookie(const AValue: String);
|
|
function GetDate: String;
|
|
procedure SetDate(const AValue: String);
|
|
function GetExpires: String;
|
|
procedure SetExpires(const AValue: String);
|
|
function GetFrom: String;
|
|
procedure SetFrom(const AValue: String);
|
|
function GetIfModifiedSince: String;
|
|
procedure SetIfModifiedSince(const AValue: String);
|
|
function GetLastModified: String;
|
|
procedure SetLastModified(const AValue: String);
|
|
function GetLocation: String;
|
|
procedure SetLocation(const AValue: String);
|
|
function GetPragma: String;
|
|
procedure SetPragma(const AValue: String);
|
|
function GetReferer: String;
|
|
procedure SetReferer(const AValue: String);
|
|
function GetRetryAfter: String;
|
|
procedure SetRetryAfter(const AValue: String);
|
|
function GetServer: String;
|
|
procedure SetServer(const AValue: String);
|
|
function Get_SetCookie: String;
|
|
procedure Set_SetCookie(const AValue: String);
|
|
function GetUserAgent: String;
|
|
procedure SetUserAgent(const AValue: String);
|
|
function GetWWWAuthenticate: String;
|
|
procedure SetWWWAuthenticate(const AValue: String);
|
|
|
|
public
|
|
HttpVersion: String;
|
|
|
|
constructor Create;
|
|
destructor Destroy; override;
|
|
procedure SetFieldByName(const AName, AValue: String);
|
|
function GetFieldByName(const AName: String): String;
|
|
|
|
procedure AsyncSend(AManager: TAsyncIOManager; AStream: THandleStream);
|
|
procedure AsyncReceive(AManager: TAsyncIOManager; AStream: THandleStream);
|
|
|
|
property Reader: TAsyncStreamLineReader read FReader;
|
|
property Writer: TAsyncWriteStream read FWriter;
|
|
property FieldCount: Integer read GetFieldCount;
|
|
property Fields[AIndex: Integer]: String read GetFields;
|
|
property FieldNames[AIndex: Integer]: String read GetFieldNames write SetFieldNames;
|
|
property FieldValues[AIndex: Integer]: String read GetFieldValues write SetFieldValues;
|
|
|
|
property OnCompleted: TNotifyEvent read FOnCompleted write FOnCompleted;
|
|
|
|
property Accept: String read GetAccept write SetAccept;
|
|
property AcceptCharset: String read GetAcceptCharset write SetAcceptCharset;
|
|
property AcceptEncoding: String read GetAcceptEncoding write SetAcceptEncoding;
|
|
property AcceptLanguage: String read GetAcceptLanguage write SetAcceptLanguage;
|
|
property Authorization: String read GetAuthorization write SetAuthorization;
|
|
property ContentEncoding: String read GetContentEncoding write SetContentEncoding;
|
|
property ContentLanguage: String read GetContentLanguage write SetContentLanguage;
|
|
property ContentLength: Integer read GetContentLength write SetContentLength;
|
|
property ContentType: String read GetContentType write SetContentType;
|
|
property Cookie: String read Get_Cookie write Set_Cookie;
|
|
property Date: String read GetDate write SetDate;
|
|
property Expires: String read GetExpires write SetExpires;
|
|
property From: String read GetFrom write SetFrom;
|
|
property IfModifiedSince: String read GetIfModifiedSince write SetIfModifiedSince;
|
|
property LastModified: String read GetLastModified write SetLastModified;
|
|
property Location: String read GetLocation write SetLocation;
|
|
property Pragma: String read GetPragma write SetPragma;
|
|
property Referer: String read GetReferer write SetReferer;
|
|
property RetryAfter: String read GetRetryAfter write SetRetryAfter;
|
|
property Server: String read GetServer write SetServer;
|
|
property SetCookie: String read Get_SetCookie write Set_SetCookie;
|
|
property UserAgent: String read GetUserAgent write SetUserAgent;
|
|
property WWWAuthenticate: String read GetWWWAuthenticate write SetWWWAuthenticate;
|
|
end;
|
|
|
|
|
|
THttpRequestHeader = class(THttpHeader)
|
|
protected
|
|
procedure ParseFirstHeaderLine(const line: String); override;
|
|
function GetFirstHeaderLine: String; override;
|
|
public
|
|
CommandLine: String;
|
|
Command: String;
|
|
URI: String; // Uniform Resource Identifier
|
|
end;
|
|
|
|
|
|
THttpAnswerHeader = class(THttpHeader)
|
|
protected
|
|
procedure ParseFirstHeaderLine(const line: String); override;
|
|
function GetFirstHeaderLine: String; override;
|
|
public
|
|
Code: Integer;
|
|
CodeText: String;
|
|
constructor Create;
|
|
end;
|
|
|
|
|
|
TCustomHttpConnection = class
|
|
protected
|
|
FManager: TAsyncIOManager;
|
|
FSocket: TInetSocket;
|
|
SendBuffer: TAsyncWriteStream;
|
|
FOnHeaderSent, FOnStreamSent, FOnHeaderReceived, FOnStreamReceived: TNotifyEvent;
|
|
RecvSize: Integer; // How many bytes are still to be read. -1 if unknown.
|
|
|
|
procedure HeaderToSendCompleted(Sender: TObject);
|
|
procedure StreamToSendCompleted(Sender: TObject);
|
|
procedure ReceivedHeaderCompleted(Sender: TObject);
|
|
procedure DataAvailable(Sender: TObject);
|
|
procedure ReceivedStreamCompleted(Sender: TObject);
|
|
|
|
property OnHeaderSent: TNotifyEvent read FOnHeaderSent write FOnHeaderSent;
|
|
property OnStreamSent: TNotifyEvent read FOnStreamSent write FOnStreamSent;
|
|
property OnHeaderReceived: TNotifyEvent read FOnHeaderReceived write FOnHeaderReceived;
|
|
property OnStreamReceived: TNotifyEvent read FOnStreamReceived write FOnStreamReceived;
|
|
|
|
public
|
|
HeaderToSend: THttpHeader;
|
|
StreamToSend: TStream;
|
|
ReceivedHeader: THttpHeader;
|
|
ReceivedStream: TStream;
|
|
|
|
constructor Create(AManager: TAsyncIOManager; ASocket: TInetSocket);
|
|
destructor Destroy; override;
|
|
procedure Start;
|
|
end;
|
|
|
|
THttpConnection = class(TCustomHttpConnection)
|
|
public
|
|
property OnHeaderSent;
|
|
property OnStreamSent;
|
|
property OnHeaderReceived;
|
|
property OnStreamReceived;
|
|
end;
|
|
|
|
|
|
|
|
// ===================================================================
|
|
// ===================================================================
|
|
|
|
implementation
|
|
|
|
uses SysUtils;
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
// THttpHeader
|
|
// -------------------------------------------------------------------
|
|
|
|
procedure THttpHeader.LineReceived(const line: String);
|
|
var
|
|
i: Integer;
|
|
begin
|
|
if Length(line) = 0 then
|
|
begin
|
|
FReader.OnLine := nil; // Stop receiving
|
|
if Assigned(FOnCompleted) then
|
|
FOnCompleted(Self);
|
|
FReader.Free;
|
|
FReader := nil;
|
|
end else
|
|
if not CmdReceived then
|
|
begin
|
|
CmdReceived := True;
|
|
ParseFirstHeaderLine(line);
|
|
end else
|
|
begin
|
|
i := Pos(':', line);
|
|
SetFieldByName(Trim(Copy(line, 1, i - 1)), Trim(Copy(line, i + 1, Length(line))));
|
|
end;
|
|
end;
|
|
|
|
procedure THttpHeader.WriterCompleted(ASender: TObject);
|
|
begin
|
|
if Assigned(FOnCompleted) then
|
|
FOnCompleted(Self);
|
|
end;
|
|
|
|
function THttpHeader.GetFieldCount: Integer;
|
|
begin
|
|
Result := FFields.Count;
|
|
end;
|
|
|
|
function THttpHeader.GetFields(AIndex: Integer): String;
|
|
begin
|
|
Result := FieldNames[AIndex] + ': ' + FieldValues[AIndex];
|
|
end;
|
|
|
|
function THttpHeader.GetFieldNames(AIndex: Integer): String;
|
|
begin
|
|
Result := PHttpField(FFields.Items[AIndex])^.Name;
|
|
end;
|
|
|
|
procedure THttpHeader.SetFieldNames(AIndex: Integer; const AName: String);
|
|
begin
|
|
PHttpField(FFields.Items[AIndex])^.Name := AName;
|
|
end;
|
|
|
|
function THttpHeader.GetFieldValues(AIndex: Integer): String;
|
|
begin
|
|
Result := PHttpField(FFields.Items[AIndex])^.Value;
|
|
end;
|
|
|
|
procedure THttpHeader.SetFieldValues(AIndex: Integer; const AValue: String);
|
|
begin
|
|
PHttpField(FFields.Items[AIndex])^.Name := AValue;
|
|
end;
|
|
|
|
function THttpHeader.GetAccept: String; begin Result := GetFieldByName(fieldAccept) end;
|
|
procedure THttpHeader.SetAccept(const AValue: String); begin SetFieldByName(fieldAccept, AValue) end;
|
|
function THttpHeader.GetAcceptCharset: String; begin Result := GetFieldByName(fieldAcceptCharset) end;
|
|
procedure THttpHeader.SetAcceptCharset(const AValue: String); begin SetFieldByName(fieldAcceptCharset, AValue) end;
|
|
function THttpHeader.GetAcceptEncoding: String; begin Result := GetFieldByName(fieldAcceptEncoding) end;
|
|
procedure THttpHeader.SetAcceptEncoding(const AValue: String); begin SetFieldByName(fieldAcceptEncoding, AValue) end;
|
|
function THttpHeader.GetAcceptLanguage: String; begin Result := GetFieldByName(fieldAcceptLanguage) end;
|
|
procedure THttpHeader.SetAcceptLanguage(const AValue: String); begin SetFieldByName(fieldAcceptLanguage, AValue) end;
|
|
function THttpHeader.GetAuthorization: String; begin Result := GetFieldByName(fieldAuthorization) end;
|
|
procedure THttpHeader.SetAuthorization(const AValue: String); begin SetFieldByName(fieldAuthorization, AValue) end;
|
|
function THttpHeader.GetContentEncoding: String; begin Result := GetFieldByName(fieldContentEncoding) end;
|
|
procedure THttpHeader.SetContentEncoding(const AValue: String); begin SetFieldByName(fieldContentEncoding, AValue) end;
|
|
function THttpHeader.GetContentLanguage: String; begin Result := GetFieldByName(fieldContentLanguage) end;
|
|
procedure THttpHeader.SetContentLanguage(const AValue: String); begin SetFieldByName(fieldContentLanguage, AValue) end;
|
|
function THttpHeader.GetContentLength: Integer; var s: String; begin s := GetFieldByName(fieldContentLength); if Length(s) = 0 then Result := -1 else Result := StrToInt(s) end;
|
|
procedure THttpHeader.SetContentLength(AValue: Integer); begin SetFieldByName(fieldContentLength, IntToStr(AValue)) end;
|
|
function THttpHeader.GetContentType: String; begin Result := GetFieldByName(fieldContentType) end;
|
|
procedure THttpHeader.SetContentType(const AValue: String); begin SetFieldByName(fieldContentType, AValue) end;
|
|
function THttpHeader.Get_Cookie: String; begin Result := GetFieldByName(fieldCookie) end;
|
|
procedure THttpHeader.Set_Cookie(const AValue: String); begin SetFieldByName(fieldCookie, AValue) end;
|
|
function THttpHeader.GetDate: String; begin Result := GetFieldByName(fieldDate) end;
|
|
procedure THttpHeader.SetDate(const AValue: String); begin SetFieldByName(fieldDate, AValue) end;
|
|
function THttpHeader.GetExpires: String; begin Result := GetFieldByName(fieldExpires) end;
|
|
procedure THttpHeader.SetExpires(const AValue: String); begin SetFieldByName(fieldExpires, AValue) end;
|
|
function THttpHeader.GetFrom: String; begin Result := GetFieldByName(fieldFrom) end;
|
|
procedure THttpHeader.SetFrom(const AValue: String); begin SetFieldByName(fieldFrom, AValue) end;
|
|
function THttpHeader.GetIfModifiedSince: String; begin Result := GetFieldByName(fieldIfModifiedSince) end;
|
|
procedure THttpHeader.SetIfModifiedSince(const AValue: String); begin SetFieldByName(fieldIfModifiedSince, AValue) end;
|
|
function THttpHeader.GetLastModified: String; begin Result := GetFieldByName(fieldLastModified) end;
|
|
procedure THttpHeader.SetLastModified(const AValue: String); begin SetFieldByName(fieldLastModified, AValue) end;
|
|
function THttpHeader.GetLocation: String; begin Result := GetFieldByName(fieldLocation) end;
|
|
procedure THttpHeader.SetLocation(const AValue: String); begin SetFieldByName(fieldLocation, AValue) end;
|
|
function THttpHeader.GetPragma: String; begin Result := GetFieldByName(fieldPragma) end;
|
|
procedure THttpHeader.SetPragma(const AValue: String); begin SetFieldByName(fieldPragma, AValue) end;
|
|
function THttpHeader.GetReferer: String; begin Result := GetFieldByName(fieldReferer) end;
|
|
procedure THttpHeader.SetReferer(const AValue: String); begin SetFieldByName(fieldReferer, AValue) end;
|
|
function THttpHeader.GetRetryAfter: String; begin Result := GetFieldByName(fieldRetryAfter) end;
|
|
procedure THttpHeader.SetRetryAfter(const AValue: String); begin SetFieldByName(fieldRetryAfter, AValue) end;
|
|
function THttpHeader.GetServer: String; begin Result := GetFieldByName(fieldServer) end;
|
|
procedure THttpHeader.SetServer(const AValue: String); begin SetFieldByName(fieldServer, AValue) end;
|
|
function THttpHeader.Get_SetCookie: String; begin Result := GetFieldByName(fieldSetCookie) end;
|
|
procedure THttpHeader.Set_SetCookie(const AValue: String); begin SetFieldByName(fieldSetCookie, AValue) end;
|
|
function THttpHeader.GetUserAgent: String; begin Result := GetFieldByName(fieldUserAgent) end;
|
|
procedure THttpHeader.SetUserAgent(const AValue: String); begin SetFieldByName(fieldUserAgent, AValue) end;
|
|
function THttpHeader.GetWWWAuthenticate: String; begin Result := GetFieldByName(fieldWWWAuthenticate) end;
|
|
procedure THttpHeader.SetWWWAuthenticate(const AValue: String); begin SetFieldByName(fieldWWWAuthenticate, AValue) end;
|
|
|
|
constructor THttpHeader.Create;
|
|
begin
|
|
inherited Create;
|
|
FFields := TList.Create;
|
|
HttpVersion := '1.0';
|
|
end;
|
|
|
|
destructor THttpHeader.Destroy;
|
|
var
|
|
i: Integer;
|
|
field: PHttpField;
|
|
begin
|
|
FReader.Free;
|
|
FWriter.Free;
|
|
for i := 0 to FFields.Count - 1 do begin
|
|
field := PHttpField(FFields.Items[i]);
|
|
SetLength(field^.Name, 0);
|
|
SetLength(field^.Value, 0);
|
|
Dispose(field);
|
|
end;
|
|
FFields.Free;
|
|
inherited Destroy;
|
|
end;
|
|
|
|
function THttpHeader.GetFieldByName(const AName: String): String;
|
|
var
|
|
i: Integer;
|
|
name: String;
|
|
begin
|
|
name := UpperCase(AName);
|
|
for i := 0 to FFields.Count - 1 do
|
|
if UpperCase(FieldNames[i]) = name then begin
|
|
Result := FieldValues[i];
|
|
exit;
|
|
end;
|
|
SetLength(Result, 0);
|
|
end;
|
|
|
|
procedure THttpHeader.SetFieldByName(const AName, AValue: String);
|
|
var
|
|
i: Integer;
|
|
name: String;
|
|
field: PHttpField;
|
|
begin
|
|
name := UpperCase(AName);
|
|
for i := 0 to FFields.Count - 1 do
|
|
if UpperCase(FieldNames[i]) = name then begin
|
|
FieldNames[i] := AName; // preserve case
|
|
FieldValues[i] := AValue;
|
|
exit;
|
|
end;
|
|
New(field);
|
|
FillChar(field^, SizeOf(field^), 0);
|
|
field^.Name := AName;
|
|
field^.Value := AValue;
|
|
FFields.Add(field);
|
|
end;
|
|
|
|
procedure THttpHeader.AsyncSend(AManager: TAsyncIOManager; AStream: THandleStream);
|
|
var
|
|
i: Integer;
|
|
begin
|
|
FWriter.Free;
|
|
FWriter := TAsyncWriteStream.Create(AManager, AStream);
|
|
FWriter.OnBufferEmpty := @WriterCompleted;
|
|
FWriter.EndOfLineMarker := #13#10;
|
|
FWriter.WriteLine(GetFirstHeaderLine);
|
|
for i := 0 to FFields.Count - 1 do
|
|
FWriter.WriteLine(Fields[i]);
|
|
FWriter.WriteLine('');
|
|
end;
|
|
|
|
procedure THttpHeader.AsyncReceive(AManager: TAsyncIOManager; AStream: THandleStream);
|
|
begin
|
|
CmdReceived := False;
|
|
FReader.Free;
|
|
FReader := TAsyncStreamLineReader.Create(AManager, AStream);
|
|
FReader.OnLine := @LineReceived;
|
|
end;
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
// THttpRequestHeader
|
|
// -------------------------------------------------------------------
|
|
|
|
procedure THttpRequestHeader.ParseFirstHeaderLine(const line: String);
|
|
var
|
|
i: Integer;
|
|
begin
|
|
CommandLine := line;
|
|
i := Pos(' ', line);
|
|
Command := Copy(line, 1, i - 1);
|
|
URI := Copy(line, i + 1, Length(line));
|
|
i := Pos(' ', URI);
|
|
if i > 0 then begin
|
|
HttpVersion := Copy(URI, i + 1, Length(URI));
|
|
URI := Copy(URI, 1, i - 1);
|
|
HttpVersion := Copy(HttpVersion, Pos('/', HttpVersion) + 1, Length(HttpVersion));
|
|
end;
|
|
end;
|
|
|
|
function THttpRequestHeader.GetFirstHeaderLine: String;
|
|
begin
|
|
Result := Command + ' ' + URI;
|
|
if Length(HttpVersion) > 0 then
|
|
Result := Result + ' HTTP/' + HttpVersion;
|
|
end;
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
// THttpAnswerHeader
|
|
// -------------------------------------------------------------------
|
|
|
|
procedure THttpAnswerHeader.ParseFirstHeaderLine(const line: String);
|
|
var
|
|
i: Integer;
|
|
s: String;
|
|
begin
|
|
i := Pos('/', line);
|
|
s := Copy(line, i + 1, Length(line));
|
|
i := Pos(' ', s);
|
|
HttpVersion := Copy(s, 1, i - 1);
|
|
s := Copy(s, i + 1, Length(s));
|
|
i := Pos(' ', s);
|
|
if i > 0 then begin
|
|
CodeText := Copy(s, i + 1, Length(s));
|
|
s := Copy(s, 1, i - 1);
|
|
end;
|
|
Code := StrToInt(s);
|
|
end;
|
|
|
|
function THttpAnswerHeader.GetFirstHeaderLine: String;
|
|
begin
|
|
Result := Format('HTTP/%s %d %s', [HttpVersion, Code, CodeText]);
|
|
end;
|
|
|
|
constructor THttpAnswerHeader.Create;
|
|
begin
|
|
inherited Create;
|
|
Code := 200;
|
|
CodeText := 'OK';
|
|
end;
|
|
|
|
|
|
// -------------------------------------------------------------------
|
|
// TCustomHttpConnection
|
|
// -------------------------------------------------------------------
|
|
|
|
procedure TCustomHttpConnection.HeaderToSendCompleted(Sender: TObject);
|
|
begin
|
|
//WriteLn('TCustomHttpConnection.HeaderToSendCompleted');
|
|
if Assigned(FOnHeaderSent) then
|
|
FOnHeaderSent(Self);
|
|
if Assigned(StreamToSend) then begin
|
|
SendBuffer := TAsyncWriteStream.Create(FManager, FSocket);
|
|
SendBuffer.CopyFrom(StreamToSend, StreamToSend.Size);
|
|
SendBuffer.OnBufferEmpty := @StreamToSendCompleted;
|
|
SendBuffer.Run;
|
|
end else
|
|
StreamToSendCompleted(nil);
|
|
end;
|
|
|
|
procedure TCustomHttpConnection.StreamToSendCompleted(Sender: TObject);
|
|
begin
|
|
if Assigned(FOnStreamSent) then
|
|
FOnStreamSent(Self);
|
|
//WriteLn('TCustomHttpConnection.StreamToSendCompleted');
|
|
SendBuffer.Free;
|
|
SendBuffer := nil;
|
|
end;
|
|
|
|
procedure TCustomHttpConnection.ReceivedHeaderCompleted(Sender: TObject);
|
|
var
|
|
BytesInBuffer: Integer;
|
|
begin
|
|
//WriteLn('TCustomHttpConnection.ReceivedHeaderCompleted');
|
|
BytesInBuffer := ReceivedHeader.Reader.BytesInBuffer;
|
|
//WriteLn('BytesInBuffer: ', BytesInBuffer, ', Content length: ', ReceivedHeader.ContentLength);
|
|
if Assigned(FOnHeaderReceived) then
|
|
FOnHeaderReceived(Self);
|
|
RecvSize := ReceivedHeader.ContentLength;
|
|
if Assigned(ReceivedStream) then
|
|
begin
|
|
if BytesInBuffer > 0 then
|
|
begin
|
|
ReceivedStream.Write(ReceivedHeader.Reader.Buffer^, BytesInBuffer);
|
|
if RecvSize > 0 then
|
|
Dec(RecvSize, BytesInBuffer);
|
|
if BytesInBuffer = ReceivedHeader.ContentLength then
|
|
begin
|
|
ReceivedStreamCompleted(nil);
|
|
exit;
|
|
end;
|
|
end;
|
|
FManager.SetReadHandler(FSocket.Handle, @DataAvailable, nil);
|
|
end else
|
|
ReceivedStreamCompleted(nil);
|
|
end;
|
|
|
|
procedure TCustomHttpConnection.DataAvailable(Sender: TObject);
|
|
var
|
|
FirstRun: Boolean;
|
|
ReadNow, BytesRead: Integer;
|
|
buf: array[0..1023] of Byte;
|
|
begin
|
|
FirstRun := True;
|
|
while True do
|
|
begin
|
|
if RecvSize >= 0 then
|
|
begin
|
|
ReadNow := RecvSize;
|
|
if ReadNow > 1024 then
|
|
ReadNow := 1024;
|
|
end else
|
|
ReadNow := 1024;
|
|
BytesRead := FSocket.Read(buf, ReadNow);
|
|
//WriteLn('TCustomHttpConnection.DataAvailable: Read ', BytesRead, ' bytes; RecvSize=', RecvSize);
|
|
if BytesRead <= 0 then
|
|
begin
|
|
if FirstRun then
|
|
ReceivedStreamCompleted(nil);
|
|
break;
|
|
end;
|
|
FirstRun := False;
|
|
ReceivedStream.Write(buf, BytesRead);
|
|
if RecvSize > 0 then
|
|
Dec(RecvSize, BytesRead);
|
|
if RecvSize = 0 then
|
|
begin
|
|
ReceivedStreamCompleted(nil);
|
|
break;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure TCustomHttpConnection.ReceivedStreamCompleted(Sender: TObject);
|
|
begin
|
|
//WriteLn('TCustomHttpConnection.ReceivedStreamCompleted');
|
|
if Assigned(FOnStreamReceived) then
|
|
FOnStreamReceived(Self);
|
|
FManager.ClearReadHandler(FSocket.Handle);
|
|
end;
|
|
|
|
constructor TCustomHttpConnection.Create(AManager: TAsyncIOManager; ASocket: TInetSocket);
|
|
begin
|
|
inherited Create;
|
|
FManager := AManager;
|
|
FSocket := ASocket;
|
|
end;
|
|
|
|
destructor TCustomHttpConnection.Destroy;
|
|
begin
|
|
FManager.ClearReadHandler(FSocket.Handle);
|
|
inherited Destroy;
|
|
end;
|
|
|
|
procedure TCustomHttpConnection.Start;
|
|
begin
|
|
// Start receiver
|
|
if Assigned(ReceivedHeader) then begin
|
|
ReceivedHeader.OnCompleted := @ReceivedHeaderCompleted;
|
|
ReceivedHeader.AsyncReceive(FManager, FSocket);
|
|
end;
|
|
|
|
// Start sender
|
|
if Assigned(HeaderToSend) then begin
|
|
// Set the 'Content-Length' field automatically, if possible
|
|
if (HeaderToSend.ContentLength = -1) and Assigned(StreamToSend) then
|
|
HeaderToSend.ContentLength := StreamToSend.Size;
|
|
|
|
HeaderToSend.OnCompleted := @HeaderToSendCompleted;
|
|
HeaderToSend.AsyncSend(FManager, FSocket)
|
|
end;
|
|
end;
|
|
|
|
|
|
end.
|
|
|
|
|
|
{
|
|
$Log$
|
|
Revision 1.3 2002-09-07 15:15:24 peter
|
|
* old logs removed and tabs fixed
|
|
|
|
}
|