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restemplate/indy/Core/IdTCPConnection.pas

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* Replaced fphttpclient with indy10. * Added compression support
2015-10-04 14:14:55 +02:00
{
$Project$
$Workfile$
$Revision$
$DateUTC$
$Id$
This file is part of the Indy (Internet Direct) project, and is offered
under the dual-licensing agreement described on the Indy website.
(http://www.indyproject.org/)
Copyright:
(c) 1993-2005, Chad Z. Hower and the Indy Pit Crew. All rights reserved.
$Log$
//TODO: Elim read/write methods - they are duped
//TODO: See second uses comment
Rev 1.68 3/7/2005 5:48:18 PM JPMugaas
Made a backdoor so we can adjust command output in specific ways.
Rev 1.67 1/15/2005 6:02:02 PM JPMugaas
These should compile again.
Rev 1.66 1/15/05 2:16:04 PM RLebeau
Misc. tweaks
Rev 1.65 12/21/04 3:20:54 AM RLebeau
Removed compiler warning
Rev 1.64 12/12/04 2:24:28 PM RLebeau
Updated WriteRFCStrings() to call new method in the IOHandler.
Rev 1.63 10/26/2004 8:43:02 PM JPMugaas
Should be more portable with new references to TIdStrings and TIdStringList.
Rev 1.62 6/11/2004 8:48:36 AM DSiders
Added "Do not Localize" comments.
Rev 1.61 2004.06.07 1:34:20 PM czhower
OnWork fix now sends running total as it should.
Rev 1.60 2004.06.06 5:18:04 PM czhower
OnWork bug fix
Rev 1.59 2004.06.05 9:46:30 AM czhower
IOHandler OnWork fix
Rev 1.58 11/05/2004 17:13:32 HHariri
Fix brought from IW for overflow of DoWork
Rev 1.57 4/19/2004 9:50:08 AM BGooijen
Fixed AV in .Disconnect
Rev 1.56 2004.04.18 12:52:04 AM czhower
Big bug fix with server disconnect and several other bug fixed that I found
along the way.
Rev 1.55 2004.03.06 10:40:30 PM czhower
Changed IOHandler management to fix bug in server shutdowns.
Rev 1.54 2004.03.06 1:32:58 PM czhower
-Change to disconnect
-Addition of DisconnectNotifyPeer
-WriteHeader now write bufers
Rev 1.53 3/1/04 7:12:00 PM RLebeau
Bug fix for SetIOHandler() not updating the FSocket member correctly.
Rev 1.52 2004.02.03 4:16:56 PM czhower
For unit name changes.
Rev 1.51 1/29/04 9:37:18 PM RLebeau
Added setter method for Greeting property
Rev 1.50 2004.01.28 9:42:32 PM czhower
Now checks for connection.
Rev 1.49 2004.01.20 10:03:36 PM czhower
InitComponent
Rev 1.48 2003.12.31 3:47:44 PM czhower
Changed to use TextIsSame
Rev 1.47 12/28/2003 4:47:40 PM BGooijen
Removed ChangeReplyClass
Rev 1.46 14/12/2003 18:14:54 CCostelloe
Added ChangeReplyClass procedure.
Rev 1.45 11/4/2003 10:28:34 PM DSiders
Removed exceptions moved to IdException.pas.
Rev 1.44 2003.10.18 9:33:28 PM czhower
Boatload of bug fixes to command handlers.
Rev 1.43 10/15/2003 7:32:48 PM DSiders
Added a resource string for the exception raised in
TIdTCPConnection.CreateIOHandler.
Rev 1.42 2003.10.14 1:27:02 PM czhower
Uupdates + Intercept support
Rev 1.41 10/10/2003 11:00:36 PM BGooijen
Added GetReplyClass
Rev 1.40 2003.10.02 8:29:40 PM czhower
Added IdReply back
Rev 1.39 2003.10.02 8:08:52 PM czhower
Removed unneeded unit in uses.
Rev 1.38 2003.10.01 9:11:28 PM czhower
.Net
Rev 1.37 2003.10.01 5:05:18 PM czhower
.Net
Rev 1.36 2003.10.01 2:30:42 PM czhower
.Net
Rev 1.35 2003.10.01 11:16:38 AM czhower
.Net
Rev 1.34 2003.09.30 1:23:06 PM czhower
Stack split for DotNet
Rev 1.33 2003.09.18 7:12:42 PM czhower
AV Fix in SetIOHandler
Rev 1.32 2003.09.18 5:18:00 PM czhower
Implemented OnWork
Rev 1.31 2003.06.30 6:17:48 PM czhower
Moved socket property to public. Dont know how/why it got protected.
Rev 1.30 2003.06.30 5:41:56 PM czhower
-Fixed AV that occurred sometimes when sockets were closed with chains
-Consolidated code that was marked by a todo for merging as it no longer
needed to be separate
-Removed some older code that was no longer necessary
Passes bubble tests.
Rev 1.29 2003.06.05 10:08:52 AM czhower
Extended reply mechanisms to the exception handling. Only base and RFC
completed, handing off to J Peter.
Rev 1.28 6/4/2003 03:54:42 PM JPMugaas
Now should compile.
Rev 1.27 2003.06.04 8:10:00 PM czhower
Modified CheckResponse string version to allow ''
Rev 1.26 2003.06.04 12:02:30 PM czhower
Additions for text code and command handling.
Rev 1.25 2003.06.03 3:44:26 PM czhower
Removed unused variable.
Rev 1.24 2003.05.30 10:25:58 PM czhower
Implemented IsEndMarker
Rev 1.23 5/26/2003 04:29:52 PM JPMugaas
Removed GenerateReply and ParseReply. Those are now obsolete duplicate
functions in the new design.
Rev 1.22 5/26/2003 12:19:56 PM JPMugaas
Rev 1.21 2003.05.26 11:38:20 AM czhower
Rev 1.20 5/25/2003 03:34:54 AM JPMugaas
Rev 1.19 5/25/2003 03:16:22 AM JPMugaas
Rev 1.18 5/20/2003 02:40:10 PM JPMugaas
Rev 1.17 5/20/2003 12:43:50 AM BGooijen
changeable reply types
Rev 1.16 4/4/2003 8:10:14 PM BGooijen
procedure CreateIOHandler is now public
Rev 1.15 3/27/2003 3:17:32 PM BGooijen
Removed MaxLineLength, MaxLineAction, SendBufferSize, RecvBufferSize,
ReadLnSplit, ReadLnTimedOut
Rev 1.14 3/19/2003 1:04:16 PM BGooijen
changed procedure CreateIOHandler a little (default parameter, and other
behavour when parameter = nil (constructs default now))
Rev 1.13 3/5/2003 11:07:18 PM BGooijen
removed intercept from this file
Rev 1.12 2003.02.25 7:28:02 PM czhower
Fixed WriteRFCReply
Rev 1.11 2003.02.25 1:36:20 AM czhower
Rev 1.10 2/13/2003 02:14:44 PM JPMugaas
Now calls ReadLn in GetInternelResponse so a space is not dropped. Dropping
a space throws off some things in FTP such as the FEAT reply.
Rev 1.9 2003.01.18 12:29:52 PM czhower
Rev 1.8 1-17-2003 22:22:08 BGooijen
new design
Rev 1.7 12-16-2002 20:44:38 BGooijen
Added procedure CreateIOHandler(....)
Rev 1.6 12-15-2002 23:32:32 BGooijen
Added RecvBufferSize
Rev 1.5 12-14-2002 22:16:32 BGooijen
improved method to detect timeouts in ReadLn.
Rev 1.4 12/6/2002 02:11:46 PM JPMugaas
Protected Port and Host properties added to TCPClient because those are
needed by protocol implementations. Socket property added to TCPConnection.
Rev 1.3 6/12/2002 11:00:16 AM SGrobety
Rev 1.0 21/11/2002 12:36:48 PM SGrobety Version: Indy 10
Rev 1.2 11/15/2002 01:26:42 PM JPMugaas
Restored Trim to ReadLnWait and changed GetInternelResponse to use ReadLn
instead of ReadLn wait.
Rev 1.1 11/14/2002 06:44:54 PM JPMugaas
Removed Trim from ReadLnWait. It was breaking the new RFC Reply parsing code
by removing the space at the beggining of a line.
Rev 1.0 11/13/2002 09:00:30 AM JPMugaas
}
unit IdTCPConnection;
interface
{$i IdCompilerDefines.inc}
{
2003-12-14 - Ciaran Costelloe
- Added procedure ChangeReplyClass, because in .NET, you cannot set FReplyClass
before calling the constructor, so call this procedure after the constructor
to set FReplyClass to (say) TIdReplyIMAP4.
2002-06 -Andrew P.Rybin
-WriteStream optimization and new "friendly" interface, InputLn fix (CrLf only if AEcho)
2002-04-12 - Andrew P.Rybin
- ReadLn bugfix and optimization
2002-01-20 - Chad Z. Hower a.k.a Kudzu
-WriteBuffer change was not correct. Removed. Need info on original problem to fix properly.
-Modified ReadLnWait
2002-01-19 - Grahame Grieve
- Fix to WriteBuffer to accept -1 from the stack.
Also fixed to clean up FWriteBuffer if connection lost.
2002-01-19 - Chad Z. Hower a.k.a Kudzu
-Fix to ReadLn
2002-01-16 - Andrew P.Rybin
-ReadStream optimization, TIdManagedBuffer new
2002-01-03 - Chad Z. Hower a.k.a Kudzu
-Added MaxLineAction
-Added ReadLnSplit
2001-12-27 - Chad Z. Hower a.k.a Kudzu
-Changes and bug fixes to InputLn
-Modifed how buffering works
-Added property InputBuffer
-Moved some things to TIdBuffer
-Modified ReadLn
-Added LineCount to Capture
2001-12-25 - Andrew P.Rybin
-MaxLineLength,ReadLn,InputLn and Merry Christmas!
Original Author and Maintainer:
-Chad Z. Hower a.k.a Kudzu
}
uses
Classes,
IdComponent,
IdException,
IdExceptionCore,
IdGlobal,
IdIntercept,
IdIOHandler,
IdIOHandlerSocket,
IdIOHandlerStack,
IdReply,
IdSocketHandle,
IdBaseComponent;
type
TIdTCPConnection = class(TIdComponent)
protected
FGreeting: TIdReply; // TODO: Only TIdFTP uses it, so it should be moved!
{$IFDEF USE_OBJECT_ARC}[Weak]{$ENDIF} FIntercept: TIdConnectionIntercept;
{$IFDEF USE_OBJECT_ARC}[Weak]{$ENDIF} FIOHandler: TIdIOHandler;
FLastCmdResult: TIdReply;
FManagedIOHandler: Boolean;
FOnDisconnected: TNotifyEvent;
{$IFDEF USE_OBJECT_ARC}[Weak]{$ENDIF} FSocket: TIdIOHandlerSocket;
FReplyClass: TIdReplyClass;
//
procedure CheckConnected;
procedure DoOnDisconnected; virtual;
procedure InitComponent; override;
function GetIntercept: TIdConnectionIntercept; virtual;
function GetReplyClass: TIdReplyClass; virtual;
procedure Notification(AComponent: TComponent; Operation: TOperation); override;
procedure SetIntercept(AValue: TIdConnectionIntercept); virtual;
procedure SetIOHandler(AValue: TIdIOHandler); virtual;
procedure SetGreeting(AValue: TIdReply);
procedure WorkBeginEvent(ASender: TObject; AWorkMode: TWorkMode; AWorkCountMax: Int64);
procedure WorkEndEvent(ASender: TObject; AWorkMode: TWorkMode);
procedure WorkEvent(ASender: TObject; AWorkMode: TWorkMode; AWorkCount: Int64);
procedure PrepareCmd(var aCmd: string); virtual;
public
procedure CreateIOHandler(ABaseType: TIdIOHandlerClass = nil);
procedure CheckForGracefulDisconnect(ARaiseExceptionIfDisconnected: Boolean = True); virtual;
//
function CheckResponse(const AResponse: Int16;
const AAllowedResponses: array of Int16): Int16; overload; virtual;
function CheckResponse(const AResponse, AAllowedResponse: string): string; overload; virtual;
//
function Connected: Boolean; virtual;
destructor Destroy; override;
// Dont allow override of this one, its for overload only
procedure Disconnect; overload; // .Net overload
procedure Disconnect(ANotifyPeer: Boolean); overload; virtual;
// This is called when a protocol sends a command to tell the other side (typically client to
// server) that it is about to disconnect. The implementation should go here.
procedure DisconnectNotifyPeer; virtual;
// GetInternalResponse is not in IOHandler as some protocols may need to
// override it. It could be still moved and proxied from here, but at this
// point it is here.
procedure GetInternalResponse(AEncoding: IIdTextEncoding = nil); virtual;
// Reads response using GetInternalResponse which each reply type can define
// the behaviour. Then checks against expected Code.
//
// Seperate one for singles as one of the older Delphi compilers cannot
// match a single number into an array. IIRC newer ones do.
function GetResponse(const AAllowedResponse: Int16 = -1;
AEncoding: IIdTextEncoding = nil): Int16; overload;
function GetResponse(const AAllowedResponses: array of Int16;
AEncoding: IIdTextEncoding = nil): Int16; overload; virtual;
// No array type for strings as ones that use strings are usually bastard
// protocols like POP3/IMAP which dont include proper substatus anyways.
//
// If a case can be made for some other condition this may be expanded
// in the future
function GetResponse(const AAllowedResponse: string;
AEncoding: IIdTextEncoding = nil): string; overload; virtual;
//
property Greeting: TIdReply read FGreeting write SetGreeting;
// RaiseExceptionForCmdResult - Overload necesary as a exception as a default param doesnt work
procedure RaiseExceptionForLastCmdResult; overload; virtual;
procedure RaiseExceptionForLastCmdResult(AException: TClassIdException);
overload; virtual;
// These are extended GetResponses, so see the comments for GetResponse
function SendCmd(AOut: string; const AResponse: Int16 = -1;
AEncoding: IIdTextEncoding = nil): Int16; overload;
function SendCmd(AOut: string; const AResponse: array of Int16;
AEncoding: IIdTextEncoding = nil): Int16; overload; virtual;
function SendCmd(AOut: string; const AResponse: string;
AEncoding: IIdTextEncoding = nil): string; overload;
//
procedure WriteHeader(AHeader: TStrings);
procedure WriteRFCStrings(AStrings: TStrings);
//
property LastCmdResult: TIdReply read FLastCmdResult;
property ManagedIOHandler: Boolean read FManagedIOHandler write FManagedIOHandler;
property Socket: TIdIOHandlerSocket read FSocket;
published
property Intercept: TIdConnectionIntercept read GetIntercept write SetIntercept;
property IOHandler: TIdIOHandler read FIOHandler write SetIOHandler;
// Events
property OnDisconnected: TNotifyEvent read FOnDisconnected write FOnDisconnected;
property OnWork;
property OnWorkBegin;
property OnWorkEnd;
end;
implementation
uses
IdAntiFreezeBase, IdResourceStringsCore, IdStackConsts, IdReplyRFC,
SysUtils;
function TIdTCPConnection.GetIntercept: TIdConnectionIntercept;
var
// under ARC, convert a weak reference to a strong reference before working with it
LIOHandler: TIdIOHandler;
begin
LIOHandler := IOHandler;
if LIOHandler <> nil then begin
Result := LIOHandler.Intercept;
end else begin
Result := FIntercept;
end;
end;
function TIdTCPConnection.GetReplyClass:TIdReplyClass;
begin
Result := TIdReplyRFC;
end;
procedure TIdTCPConnection.CreateIOHandler(ABaseType:TIdIOHandlerClass=nil);
begin
if Connected then begin
raise EIdException.Create(RSIOHandlerCannotChange);
end;
if Assigned(ABaseType) then begin
IOHandler := TIdIOHandler.MakeIOHandler(ABaseType, Self);
end else begin
IOHandler := TIdIOHandler.MakeDefaultIOHandler(Self);
end;
ManagedIOHandler := True;
end;
function TIdTCPConnection.Connected: Boolean;
var
// under ARC, convert a weak reference to a strong reference before working with it
LIOHandler: TIdIOHandler;
begin
// Its been changed now that IOHandler is not usually nil, but can be before the initial connect
// and also this keeps it here so the user does not have to access the IOHandler for this and
// also to allow future control from the connection.
LIOHandler := IOHandler;
Result := Assigned(LIOHandler);
if Result then begin
Result := LIOHandler.Connected;
end;
end;
destructor TIdTCPConnection.Destroy;
var
// under ARC, convert a weak reference to a strong reference before working with it
LIOHandler: TIdIOHandler;
begin
// Just close IOHandler directly. Dont call Disconnect - Disconnect may be override and
// try to read/write to the socket.
LIOHandler := IOHandler;
if Assigned(LIOHandler) then begin
LIOHandler.Close;
// This will free any managed IOHandlers
{$IFDEF USE_OBJECT_ARC}LIOHandler := nil;{$ENDIF}
SetIOHandler(nil);
end;
FreeAndNil(FLastCmdResult);
FreeAndNil(FGreeting);
inherited Destroy;
end;
procedure TIdTCPConnection.Disconnect(ANotifyPeer: Boolean);
var
// under ARC, convert a weak reference to a strong reference before working with it
LIOHandler: TIdIOHandler;
begin
try
// Separately to avoid calling .Connected unless needed
if ANotifyPeer then begin
// TODO: do not call Connected() here if DisconnectNotifyPeer() is not
// overriden. Ideally, Connected() should be called by overridden
// DisconnectNotifyPeer() implementations if they really need it. But
// to avoid any breakages in third-party overrides, we could check here
// if DisconnectNotifyPeer() has been overridden and then call Connected()
// to maintain existing behavior...
//
try
if Connected then begin
DisconnectNotifyPeer;
end;
except
// TODO: maybe shallow only EIdConnClosedGracefully and EIdSocketError?
end;
end;
finally
{
there are a few possible situations here:
1) we are still connected, then everything works as before,
status disconnecting, then disconnect, status disconnected
2) we are not connected, and this is just some "rogue" call to
disconnect(), then nothing happens
3) we are not connected, because ClosedGracefully, then
LConnected will be false, but the implicit call to
CheckForDisconnect (inside Connected) will call the events
}
// We dont check connected here - we realy dont care about actual socket state
// Here we just want to close the actual IOHandler. It is very possible for a
// socket to be disconnected but the IOHandler still open. In this case we only
// care of the IOHandler is still open.
//
// This is especially important if the socket has been disconnected with error, at this
// point we just want to ignore it and checking .Connected would trigger this. We
// just want to close. For some reason NS 7.1 (And only 7.1, not 7.0 or Mozilla) cause
// CONNABORTED. So its extra important we just disconnect without checking socket state.
LIOHandler := IOHandler;
if Assigned(LIOHandler) then begin
if LIOHandler.Opened then begin
DoStatus(hsDisconnecting);
LIOHandler.Close;
DoOnDisconnected;
DoStatus(hsDisconnected);
//LIOHandler.InputBuffer.Clear;
end;
end;
end;
end;
procedure TIdTCPConnection.DoOnDisconnected;
begin
if Assigned(OnDisconnected) then begin
OnDisconnected(Self);
end;
end;
function TIdTCPConnection.GetResponse(const AAllowedResponses: array of Int16;
AEncoding: IIdTextEncoding = nil): Int16;
begin
GetInternalResponse(AEncoding);
Result := CheckResponse(LastCmdResult.NumericCode, AAllowedResponses);
end;
procedure TIdTCPConnection.RaiseExceptionForLastCmdResult(
AException: TClassIdException);
begin
raise AException.Create(LastCmdResult.Text.Text);
end;
procedure TIdTCPConnection.RaiseExceptionForLastCmdResult;
begin
LastCmdResult.RaiseReplyError;
end;
function TIdTCPConnection.SendCmd(AOut: string; const AResponse: Array of Int16;
AEncoding: IIdTextEncoding = nil): Int16;
begin
CheckConnected;
PrepareCmd(AOut);
IOHandler.WriteLn(AOut, AEncoding);
Result := GetResponse(AResponse, AEncoding);
end;
// under ARC, all weak references to a freed object get nil'ed automatically
// so this is mostly redundant
procedure TIdTCPConnection.Notification(AComponent: TComponent; Operation: TOperation);
begin
if (Operation = opRemove) then begin
{$IFNDEF USE_OBJECT_ARC}
if (AComponent = FIntercept) then begin
FIntercept := nil;
end else
{$ENDIF}
if (AComponent = FIOHandler) then begin
FIOHandler := nil;
FSocket := nil;
FManagedIOHandler := False;
end;
end;
inherited Notification(AComponent, Operation);
end;
procedure TIdTCPConnection.SetIntercept(AValue: TIdConnectionIntercept);
var
// under ARC, convert weak references to strong references before working with them
LIntercept: TIdConnectionIntercept;
LIOHandler: TIdIOHandler;
begin
LIntercept := FIntercept;
if LIntercept <> AValue then
begin
LIOHandler := IOHandler;
// RLebeau 8/25/09 - normally, short-circuit logic should skip all subsequent
// evaluations in a multi-condition statement once one of the conditions
// evaluates to False. However, a user just ran into a situation where that
// was not the case! It caused an AV in SetIOHandler() further below when
// AValue was nil (from Destroy() further above) because Assigned(AValue.Intercept)
// was still being evaluated even though Assigned(AValue) was returning False.
// SetIntercept() is using the same kind of short-circuit logic here as well.
// Let's not rely on short-circuiting anymore, just to be on the safe side.
//
// old code: if Assigned(IOHandler) and Assigned(IOHandler.Intercept) and Assigned(AValue) and (AValue <> IOHandler.Intercept) then begin
//
if Assigned(LIOHandler) and Assigned(AValue) then begin
if Assigned(LIOHandler.Intercept) and (LIOHandler.Intercept <> AValue) then begin
raise EIdException.Create(RSInterceptIsDifferent);
end;
end;
// TODO: should LIntercept.Connection be set to nil here if LIntercept
// is not nil and LIntercept.Connection is set to Self?
{$IFDEF USE_OBJECT_ARC}
// under ARC, all weak references to a freed object get nil'ed automatically
FIntercept := AValue;
{$ELSE}
// remove self from the Intercept's free notification list
if Assigned(LIntercept) then begin
LIntercept.RemoveFreeNotification(Self);
end;
FIntercept := AValue;
// add self to the Intercept's free notification list
if Assigned(AValue) then begin
AValue.FreeNotification(Self);
end;
{$ENDIF}
if Assigned(LIOHandler) then begin
LIOHandler.Intercept := AValue;
end;
// TODO: should FIntercept.Connection be set to Self here if FIntercept
// is not nil?
end;
end;
procedure TIdTCPConnection.SetIOHandler(AValue: TIdIOHandler);
var
// under ARC, convert weak references to strong references before working with them
LIOHandler: TIdIOHandler;
LIntercept, LOtherIntercept: TIdConnectionIntercept;
begin
LIOHandler := FIOHandler;
if LIOHandler <> AValue then begin
LIntercept := FIntercept;
// RLebeau 8/25/09 - normally, short-circuit logic should skip all subsequent
// evaluations in a multi-condition statement once one of the conditions
// evaluates to False. However, a user just ran into a situation where that
// was not the case! It caused an AV when AValue was nil (from Destroy()
// further above) because Assigned(AValue.Intercept) was still being evaluated
// even though Assigned(AValue) was returning False. Let's not rely on
// short-circuiting anymore, just to be on the safe side.
//
// old code: if Assigned(AValue) and Assigned(AValue.Intercept) and Assigned(FIntercept) and (AValue.Intercept <> FIntercept) then begin
//
if Assigned(AValue) and Assigned(LIntercept) then begin
LOtherIntercept := AValue.Intercept;
if Assigned(LOtherIntercept) then begin
if LOtherIntercept <> LIntercept then begin
raise EIdException.Create(RSInterceptIsDifferent);
end;
{$IFDEF USE_OBJECT_ARC}LOtherIntercept := nil;{$ENDIF}
end;
end;
if ManagedIOHandler then begin
if Assigned(LIOHandler) then begin
FIOHandler := nil;
IdDisposeAndNil(LIOHandler);
end;
ManagedIOHandler := False;
end;
// under ARC, all weak references to a freed object get nil'ed automatically
// Reset this if nil (to match nil, but not needed) or when a new IOHandler is specified
// If true, code must set it after the IOHandler is set
// Must do after call to FreeManagedIOHandler
FSocket := nil;
// Clear out old values whether setting AValue to nil, or setting a new value
if Assigned(LIOHandler) then begin
LIOHandler.WorkTarget := nil;
{$IFNDEF USE_OBJECT_ARC}
LIOHandler.RemoveFreeNotification(Self);
{$ENDIF}
end;
if Assigned(AValue) then begin
{$IFNDEF USE_OBJECT_ARC}
// add self to the IOHandler's free notification list
AValue.FreeNotification(Self);
{$ENDIF}
// Must set to handlers and not events directly as user may change
// the events of TCPConnection after we have initialized these and then
// these would point to old values
AValue.WorkTarget := Self;
if Assigned(LIntercept) then begin
AValue.Intercept := LIntercept;
end;
if AValue is TIdIOHandlerSocket then begin
FSocket := TIdIOHandlerSocket(AValue);
end;
end;
// Last as some code uses FIOHandler to finalize items
FIOHandler := AValue;
end;
end;
procedure TIdTCPConnection.WriteHeader(AHeader: TStrings);
var
i: Integer;
LBufferingStarted: Boolean;
// under ARC, convert a weak reference to a strong reference before working with it
LIOHandler: TIdIOHandler;
begin
CheckConnected;
LIOHandler := IOHandler;
LBufferingStarted := not LIOHandler.WriteBufferingActive;
if LBufferingStarted then begin
LIOHandler.WriteBufferOpen;
end;
try
for i := 0 to AHeader.Count -1 do begin
// No ReplaceAll flag - we only want to replace the first one
LIOHandler.WriteLn(ReplaceOnlyFirst(AHeader[i], '=', ': '));
end;
LIOHandler.WriteLn;
if LBufferingStarted then begin
LIOHandler.WriteBufferClose;
end;
except
if LBufferingStarted then begin
LIOHandler.WriteBufferCancel;
end;
raise;
end;
end;
function TIdTCPConnection.SendCmd(AOut: string; const AResponse: Int16 = -1;
AEncoding: IIdTextEncoding = nil): Int16;
begin
if AResponse < 0 then begin
Result := SendCmd(AOut, [], AEncoding);
end else begin
Result := SendCmd(AOut, [AResponse], AEncoding);
end;
end;
procedure TIdTCPConnection.CheckForGracefulDisconnect(ARaiseExceptionIfDisconnected: Boolean);
var
// under ARC, convert a weak reference to a strong reference before working with it
LIOHandler: TIdIOHandler;
begin
LIOHandler := IOHandler;
if Assigned(LIOHandler) then begin
LIOHandler.CheckForDisconnect(ARaiseExceptionIfDisconnected);
end else if ARaiseExceptionIfDisconnected then begin
raise EIdException.Create(RSNotConnected);
end;
end;
function TIdTCPConnection.CheckResponse(const AResponse: Int16;
const AAllowedResponses: array of Int16): Int16;
var
i: Integer;
LResponseFound: Boolean;
begin
if High(AAllowedResponses) > -1 then begin
LResponseFound := False;
for i := Low(AAllowedResponses) to High(AAllowedResponses) do begin
if AResponse = AAllowedResponses[i] then begin
LResponseFound := True;
Break;
end;
end;
if not LResponseFound then begin
RaiseExceptionForLastCmdResult;
end;
end;
Result := AResponse;
end;
procedure TIdTCPConnection.GetInternalResponse(AEncoding: IIdTextEncoding = nil);
var
LLine: string;
LResponse: TStringList;
// under ARC, convert a weak reference to a strong reference before working with it
LIOHandler: TIdIOHandler;
begin
CheckConnected;
LResponse := TStringList.Create;
try
// Some servers with bugs send blank lines before reply. Dont remember which
// ones, but I do remember we changed this for a reason
// RLebeau 9/14/06: this can happen in between lines of the reply as well
LIOHandler := IOHandler;
repeat
LLine := LIOHandler.ReadLnWait(MaxInt, AEncoding);
LResponse.Add(LLine);
until FLastCmdResult.IsEndMarker(LLine);
//Note that FormattedReply uses an assign in it's property set method.
FLastCmdResult.FormattedReply := LResponse;
finally
FreeAndNil(LResponse);
end;
end;
procedure TIdTCPConnection.WriteRFCStrings(AStrings: TStrings);
begin
CheckConnected;
IOHandler.WriteRFCStrings(AStrings, True);
end;
function TIdTCPConnection.GetResponse(const AAllowedResponse: Int16 = -1;
AEncoding: IIdTextEncoding = nil): Int16;
begin
if AAllowedResponse < 0 then begin
Result := GetResponse([], AEncoding);
end else begin
Result := GetResponse([AAllowedResponse], AEncoding);
end;
end;
function TIdTCPConnection.GetResponse(const AAllowedResponse: string;
AEncoding: IIdTextEncoding = nil): string;
begin
GetInternalResponse(AEncoding);
Result := CheckResponse(LastCmdResult.Code, AAllowedResponse);
end;
function TIdTCPConnection.SendCmd(AOut: string; const AResponse: string;
AEncoding: IIdTextEncoding = nil): string;
begin
CheckConnected;
PrepareCmd(AOut);
IOHandler.WriteLn(AOut, AEncoding);
Result := GetResponse(AResponse, AEncoding);
end;
function TIdTCPConnection.CheckResponse(const AResponse, AAllowedResponse: string): string;
begin
if (AAllowedResponse <> '')
and (not TextIsSame(AResponse, AAllowedResponse)) then begin
RaiseExceptionForLastCmdResult;
end;
Result := AResponse;
end;
procedure TIdTCPConnection.WorkBeginEvent(ASender: TObject; AWorkMode: TWorkMode;
AWorkCountMax: Int64);
begin
BeginWork(AWorkMode, AWorkCountMax)
end;
procedure TIdTCPConnection.WorkEndEvent(ASender: TObject; AWorkMode: TWorkMode);
begin
EndWork(AWorkMode)
end;
procedure TIdTCPConnection.WorkEvent(ASender: TObject; AWorkMode: TWorkMode;
AWorkCount: Int64);
begin
DoWork(AWorkMode, AWorkCount)
end;
procedure TIdTCPConnection.InitComponent;
begin
inherited InitComponent;
FReplyClass := GetReplyClass;
FGreeting := FReplyClass.CreateWithReplyTexts(nil, nil);
FLastCmdResult := FReplyClass.CreateWithReplyTexts(nil, nil);
end;
procedure TIdTCPConnection.CheckConnected;
begin
if not Assigned(IOHandler) then begin
raise EIdNotConnected.Create(RSNotConnected);
end;
end;
procedure TIdTCPConnection.SetGreeting(AValue: TIdReply);
begin
FGreeting.Assign(AValue);
end;
procedure TIdTCPConnection.Disconnect;
begin
// The default should be to tell the other side we are disconnecting
Disconnect(True);
end;
procedure TIdTCPConnection.DisconnectNotifyPeer;
begin
end;
procedure TIdTCPConnection.PrepareCmd(var aCmd: string);
begin
//Leave this empty here. It's for cases where we may need to
// override what is sent to a server in a transparent manner.
end;
end.