解答: Indy 是如何实现 服务器端发送数据,客户端接收数据的~!

[guizhong_over]

请问 INDY 是如何实现服务器端发送数据,客户端接收数据的~!?

谢谢~!

[ly_liuyang]

Lock了Client List就可以用Connection的Write***方法

[ydlchina]

Indy的例子中就有.

[Bear_hx]

传送数据是通过对等Socket来实现的，只要你把数据发出去就可以了，找对等Socket就是OnRead中的一个参数。

[guizhong_over]

回复:失踪的月亮[hongqi162]


在Indy10中不是这样的~

有好多都被修改了,

比如说.AThread.Connection.WriteBuffer(...);就改掉了

我到现在都还没有完全弄清楚呢~!

[guizhong_over]

问题还没有解决,请求帮助~!

[guizhong_over]

回复:月亮上的猪[ydlchina]

Indy10 demo中就只有从IdtcpClient发送数据,idTCPServer接收的例子啊~

[guizhong_over]

回复:寒萧[Bear_hx]

Indy10 中已经没有OnRead method 了

还是不太明白,对等Socket是如何实现的

谢谢~

[hongqi162]

with AThread.Connection do
begin
Write('');
end;

[still_alive]

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.

[try__again]

socket

[meiZiNick]

等待牛人来答.