indy10 idtcpserver 如何向客户端发送数据?

[无栈程序猿]

indy10 idtcpserver 如何向客户端发送数据?

[piaoxueskysz]

我的做法定义一个结构
TClientList=Record
Client: TIdContext;
wsRecv: TDateTime;
end;

UClientList=array of TClientList;

ClientList: UClientList;

效果还不错
或是可以定义个TList也一样。。

[ydlchina]

网上下载的Indy10 Demo有实例

[still_alive]

type
TCommBlock = record // the Communication Block used in both parts (Server+Client)
Command,
MyUserName, // the sender of the message
Msg, // the message itself
ReceiverName: string[100]; // name of receiver
end;
//上面是定义的消息块
//下面是程序
{ $HDR$}
{**********************************************************************}
{ Unit archived using Team Coherence }
{ Team Coherence is Copyright 2002 by Quality Software Components }
{ }
{ For further information / comments, visit our WEB site at }
{ http://www.TeamCoherence.com }
{**********************************************************************}
{}
{ $Log: 110641: ServerFrmMainUnit.pas
{
{ Rev 1.0 25/10/2004 23:14:14 ANeillans Version: 9.0.17
{ Verified
}
{-----------------------------------------------------------------------------
Demo Name: ServerFrmMainUnit
Author: Helge Jung ([e-mail])
Copyright: Indy Pit Crew
Purpose:
History: Improvements supplied by: Enver ALTIN
-----------------------------------------------------------------------------
Notes:

Demonstration on how to use TIdTCPServer and TIdTCPClient
with using Threads and WriteBuffer/ReadBuffer

Verified:
Indy 9:
D7: 25th Oct 2004 by Andy Neillans
}

unit ServerFrmMainUnit;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, IdTCPServer, IdThreadMgr, IdThreadMgrDefault, IdBaseComponent,
IdComponent;

type
PClient = ^TClient;
TClient = record // Object holding data of client (see events)
DNS : String[20]; { Hostname }
Connected, { Time of connect }
LastAction : TDateTime; { Time of last transaction }
Thread : Pointer; { Pointer to thread }
end;

TServerFrmMain = class(TForm)
Server: TIdTCPServer;
CBServerActive: TCheckBox;
Protocol: TMemo;
IdThreadMgrDefault1: TIdThreadMgrDefault;

procedure CBServerActiveClick(Sender: TObject);
procedure ServerConnect(AThread: TIdPeerThread);
procedure ServerExecute(AThread: TIdPeerThread);
procedure ServerDisconnect(AThread: TIdPeerThread);
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);

private

public
end;

var
ServerFrmMain : TServerFrmMain;
Clients : TThreadList; // Holds the data of all clients

implementation

uses GlobalUnit;

{$R *.DFM}

procedure TServerFrmMain.CBServerActiveClick(Sender: TObject);
begin
Server.Active := CBServerActive.Checked;
end;

procedure TServerFrmMain.ServerConnect(AThread: TIdPeerThread);
var
NewClient: PClient;

begin
GetMem(NewClient, SizeOf(TClient));

NewClient.DNS := AThread.Connection.LocalName;
NewClient.Connected := Now;
NewClient.LastAction := NewClient.Connected;
NewClient.Thread :=AThread;

AThread.Data:=TObject(NewClient);

try
Clients.LockList.Add(NewClient);
finally
Clients.UnlockList;
end;

Protocol.Lines.Add(TimeToStr(Time)+' Connection from "'+NewClient.DNS+'"');
end;

procedure TServerFrmMain.ServerExecute(AThread: TIdPeerThread);
var
ActClient, RecClient: PClient;
CommBlock, NewCommBlock: TCommBlock;
RecThread: TIdPeerThread;
i: Integer;

begin
if not AThread.Terminated and AThread.Connection.Connected then
begin
AThread.Connection.ReadBuffer (CommBlock, SizeOf (CommBlock));
ActClient := PClient(AThread.Data);
ActClient.LastAction := Now; // update the time of last action

if (CommBlock.Command = 'MESSAGE') or (CommBlock.Command = 'DIALOG') then
begin // 'MESSAGE': A message was send - forward or broadcast it
// 'DIALOG': A dialog-window shall popup on the recipient's screen
// it's the same code for both commands...

if CommBlock.ReceiverName = '' then
begin // no recipient given - broadcast
Protocol.Lines.Add (TimeToStr(Time)+' Broadcasting '+CommBlock.Command+': "'+CommBlock.Msg+'"');
NewCommBlock := CommBlock; // nothing to change ;-))

with Clients.LockList do
try
for i := 0 to Count-1 do // iterate through client-list
begin
RecClient := Items[i]; // get client-object
RecThread := RecClient.Thread; // get client-thread out of it
RecThread.Connection.WriteBuffer(NewCommBlock, SizeOf(NewCommBlock), True); // send the stuff
end;
finally
Clients.UnlockList;
end;
end
else
begin // receiver given - search him and send it to him
NewCommBlock := CommBlock; // again: nothing to change ;-))
Protocol.Lines.Add(TimeToStr(Time)+' Sending '+CommBlock.Command+' to "'+CommBlock.ReceiverName+'": "'+CommBlock.Msg+'"');
with Clients.LockList do
try
for i := 0 to Count-1 do
begin
RecClient:=Items[i];
if RecClient.DNS=CommBlock.ReceiverName then // we don't have a login function so we have to use the DNS (Hostname)
begin
RecThread:=RecClient.Thread;
RecThread.Connection.WriteBuffer(NewCommBlock, SizeOf(NewCommBlock), True);
end;
end;
finally
Clients.UnlockList;
end;
end;
end
else
begin // unknown command given
Protocol.Lines.Add (TimeToStr(Time)+' Unknown command from "'+CommBlock.MyUserName+'": '+CommBlock.Command);
NewCommBlock.Command := 'DIALOG'; // the message should popup on the client's screen
NewCommBlock.MyUserName := '[Server]'; // the server's username
NewCommBlock.Msg := 'I don''t understand your command: "'+CommBlock.Command+'"'; // the message to show
NewCommBlock.ReceiverName := '[return-to-sender]'; // unnecessary

AThread.Connection.WriteBuffer (NewCommBlock, SizeOf (NewCommBlock), true); // and there it goes...
end;
end;
end;

procedure TServerFrmMain.ServerDisconnect(AThread: TIdPeerThread);
var
ActClient: PClient;

begin
ActClient := PClient(AThread.Data);
Protocol.Lines.Add (TimeToStr(Time)+' Disconnect from "'+ActClient^.DNS+'"');
try
Clients.LockList.Remove(ActClient);
finally
Clients.UnlockList;
end;
FreeMem(ActClient);
AThread.Data := nil;
end;

procedure TServerFrmMain.FormCreate(Sender: TObject);
begin
Clients := TThreadList.Create;
end;

procedure TServerFrmMain.FormClose(Sender: TObject; var Action: TCloseAction);
begin
Server.Active := False;
Clients.Free;
end;

end.

[yao518]

楼上的,你是的INDY9的,发资料的时候看一下标题吧.就是你们这种人增加了网站上的垃圾.

[sanguomi]

楼上的别这么激动,就算不是的，自己改下就好了嘛

[yao518]

楼上的兄弟,我是为楼主想.如果你有能力你改给我看看 indy9 改到 indy10 你知道里面有好多的函数不一样吗?

我还真是服了你们/

[UltraBejing]

都是很好的建议! 值得学习