快速回答：
1&3) 是的。根据经验，不要实现 OnExecute 服务事件。从 OnStart 服务事件生成您自己的线程。当您收到 OnStop 服务事件时，可以终止该线程。
2）你让你的线程像这样保持活动状态（执行方法）：
while not Terminated do
begin
// do something
end;
4）通常每个客户端连接都会存在于它自己的线程上。 （即 TCP 服务器为每个客户端生成一个新线程）。使用众所周知的堆栈，例如 Indy 或 ICS。关于 HTTP 更新，您可以在生成的客户端连接线程中执行此操作。
5) 是的，请注意，您需要更高的权限才能执行此操作。
在我的职业生涯中，我已经制作了相当多的服务，到目前为止，我始终对服务应用程序使用相同的框架：
unit u_svc_main;
interface
uses
// Own units
u_globals, u_eventlog, u_MyThread,
// Third party units
// Delphi units
Windows, Messages, Registry, SysUtils, Classes, SvcMgr;
type
TMyService = class(TService)
procedure ServiceCreate(Sender: TObject);
procedure ServiceAfterUninstall(Sender: TService);
procedure ServiceAfterInstall(Sender: TService);
procedure ServiceShutdown(Sender: TService);
procedure ServiceStop(Sender: TService; var Stopped: Boolean);
procedure ServiceStart(Sender: TService; var Started: Boolean);
private
{ Private declarations }
MyThread : TMyThread;
public
{ Public declarations }
function GetServiceController: TServiceController; override;
end;
var MyService : TMyService;
implementation
{$R *.DFM}
procedure ServiceController(CtrlCode: DWord); stdcall;
begin
MyService.Controller(CtrlCode);
end;
function TMyService.GetServiceController: TServiceController;
begin
Result := ServiceController;
end;
procedure TMyService.ServiceCreate(Sender: TObject);
begin
DisplayName := 'myservice';
end;
procedure TMyService.ServiceAfterInstall(Sender: TService);
var
Reg : TRegistry;
ImagePath : string;
begin
// create needed registry entries after service installation
Reg := TRegistry.Create;
try
Reg.RootKey := HKEY_LOCAL_MACHINE;
// set service description
if Reg.OpenKey(STR_REGKEY_SVC,False) then
begin
ImagePath := Reg.ReadString(STR_REGVAL_IMAGEPATH);
Reg.WriteString(STR_REGVAL_DESCRIPTION, STR_INFO_SVC_DESC);
Reg.CloseKey;
end;
// set message resource for eventlog
if Reg.OpenKey(STR_REGKEY_EVENTMSG, True) then
begin
Reg.WriteString(STR_REGVAL_EVENTMESSAGEFILE, ImagePath);
Reg.WriteInteger(STR_REGVAL_TYPESSUPPORTED, 7);
Reg.CloseKey;
end;
// set installdir
if ImagePath <> '' then
if Reg.OpenKey(STR_REGKEY_FULL,True) then
begin
Reg.WriteString(STR_REGVAL_INSTALLDIR, ExtractFilePath(ImagePath));
Reg.CloseKey;
end;
finally
FreeAndNil(Reg);
end;
end;
procedure TMyService.ServiceAfterUninstall(Sender: TService);
var
Reg : TRegistry;
begin
Reg := TRegistry.Create;
try
// delete self created registry keys
Reg.RootKey := HKEY_LOCAL_MACHINE;
Reg.DeleteKey(STR_REGKEY_EVENTMSG);
finally
FreeAndNil(Reg);
end;
end;
procedure TMyService.ServiceShutdown(Sender: TService);
var
Stopped : boolean;
begin
// is called when windows shuts down
ServiceStop(Self, Stopped);
end;
procedure TMyService.ServiceStart(Sender: TService; var Started: Boolean);
begin
Started := False;
try
MyThread := TMyThread.Create;
MyThread.Resume;
NTEventLog.Add(Eventlog_Success, STR_INFO_SVC_STARTED);
Started := True;
except
on E : Exception do
begin
// add event in eventlog with reason why the service couldn't start
NTEventLog.Add(Eventlog_Error_Type, Format(STR_INFO_SVC_STARTFAIL, [E.Message]));
end;
end;
end;
procedure TMyService.ServiceStop(Sender: TService; var Stopped: Boolean);
begin
try
Stopped := True; // always stop service, even if we had exceptions, this is to prevent "stuck" service (must reboot then)
MyThread.Terminate;
// give MyThread 60 seconds to terminate
if WaitForSingleObject(MyThread.ThreadEvent, 60000) = WAIT_OBJECT_0 then
begin
FreeAndNil(MyThread);
NTEventLog.Add(Eventlog_Success,STR_INFO_SVC_STOPPED);
end;
except
on E : Exception do
begin
// add event in eventlog with reason why the service couldn't stop
NTEventLog.Add(Eventlog_Error_Type, Format(STR_INFO_SVC_STOPFAIL, [E.Message]));
end;
end;
end;
end.
