利用Delphi-cross-socket 库提升kbmmw 跨平台开发

以前我写过了，通过httpsys 提升windows 下，delphi 多层应用。随着delphi 10.2 对linux 的支持，很多人也想在linux 下

发布kbmmw 服务器，但是官方仅通过indy 支持 linux。刚好国内有大牛开源了Delphi 跨平台 Socket 通讯库.

通过这个可以直接让kbmmw 服务器高速的运行在在windows、linux、Mac 上。

delphi-cross-socket 的开源地址为：https://github.com/winddriver/Delphi-Cross-Socket

下面是官网的部分介绍。

Delphi 跨平台 Socket 通讯库

作者: WiNDDRiVER(soulawing@gmail.com)
重要更新(2017.08.22)

    代码重构, 做了大量修改, 详见源码
    增加了几个新的 interface, 用法详见 demos
        ICrossSocket
        ICrossSslSocket
        ICrossServer
        ICrossSslServer

特性

    针对不同平台使用不同的IO模型:
        IOCP

        Windows

        KQUEUE

        FreeBSD(MacOSX, iOS...)

        EPOLL

        Linux(Linux, Android...)

    支持极高的并发
        Windows

        能跑10万以上的并发数, 需要修改注册表调整默认的最大端口数

        Mac

        做了初步测试, 测试环境为虚拟机中的 OSX 10.9.5, 即便修改了系统的句柄数限制, 最多也只能打开32000多个并发连接, 或许 OSX Server 版能支持更高的并发吧

    同时支持IPv4、IPv6

    零内存拷贝

已通过测试

    Windows
    OSX
    iOS
    Android
    Linux

建议开发环境

    要发挥跨平台的完整功能请使用Delphi 10.2 Tokyo及以上的版本
    最低要求支持泛型和匿名函数的Delphi版本, 具体是从哪个版本开始支持泛型和匿名函数的我也不是太清楚

大家可以下载对应的源码，并使用delphi 测试它附带的例子程序。

今天简单说一下如何利用delphi-cross-socket 实现kbmmw 的跨平台开发。

首先我们做一个kbmmw transport.

声明如下。

unit kbmMWCrossScoketServerTransport;

{.$define httpsyslog}

interface

uses
  Classes, Sysutils,
  kbmMWCustomTransport,kbmMWServer,kbmMWGlobal, variants,
  kbmMWHTTPUtils,kbmMWExceptions,
  {$ifdef httpsyslog}
       kbmMWLog,
  {$endif}
  Net.CrossSocket,
  {$IFDEF __SSL__}
  Net.CrossSslSocket,
  {$IFDEF POSIX}
  Net.CrossSslDemoCert,
  {$ENDIF}
  {$ENDIF}
  Net.SocketAPI;

type

  TProtServer = class(TkbmMWServer);
  TxalionTransport=class(TkbmMWCustomServerTransport);

  Txalioninfo=class(TkbmMWServerTransportInfo);

  Txalionserver = class
  private
         FServer:Tkbmmwserver;
         FTransport: TkbmMWCustomServerTransport;

         FSocket: {$IFDEF __SSL__}TCrossSslSocket{$ELSE}TCrossSocket{$ENDIF};

   procedure OnReceived(Sender: TObject; AConnection: ICrossConnection; ABuf: Pointer; ALen: Integer);

  public
    constructor Create;
    destructor Destroy; override;

  end;

 TkbmMWCustomCrossScoketServerTransport = class(TkbmMWCustomServerTransport)
  private
    { Private declarations }

      FCrossScoketServer: TxalionServer;

      Fhost:string;
      Fport:integer;
     // Fssl:boolean;
      Fversion:string;

  public
    // @exclude
    constructor Create(AOwner:TComponent); override;
    // @exclude
    destructor Destroy; override;

  public
     class function IsSerializedTransport:boolean; override;
     class function IsConnectionlessTransport:boolean; override;

     procedure Listen; override;
     procedure Close; override;

    function IsListening:boolean; override;

  published

    { 服务器 ip    例如   127.0.0.1}
    property Host:string read Fhost write Fhost;

    property Port:integer read Fport write Fport;

    Property Version:string read Fversion;

  end;

{$IFDEF LEVEL16}
  [ComponentPlatformsAttribute({$IFDEF LEVEL26}pidLinux64 or{$ENDIF}
                               {$IFDEF LEVEL23}pidiOSDevice64 or {$ENDIF}
                               {$IFDEF LEVEL18}pidiOSSimulator or pidiOSDevice or {$ENDIF}
                               {$IFDEF LEVEL19}pidAndroid or {$ENDIF}
                               pidWin32 or pidWin64
                               {$IFDEF LEVEL17} or pidOSX32{$ENDIF})]
{$ENDIF}

  TkbmMWCrossScoketServerTransport= class(TkbmMWCustomCrossScoketServerTransport)
  published
    { Published declarations }

    property Crypt;
    property Compression;
    property StreamFormat;
    property VerifyTransfer;
    property TransportStateOptions;
    property FormatSettings;
    property Plugin;
    property Params;
    property StringConversion;
    property NodeID;
    property ClusterID;
  end;
 {$I CrossSocketversion.inc}

{$ifdef httpsyslog}
 var

  filelogmgr:TkbmMWLocalFileLogManager;

{$endif}

实现部分如下：

implementation

function kbmMWCrossScoketPutVerificationHeader(Size:integer):Tbytes;
var
   s:string;
   c:byte;
   i:integer;
const
   EOL=##;
begin
          s:=format('KBMMW X%0.8x ',[Size]); // 16 bytes.
          c:=;
          for i:=KBMMW_STRINGCHAROFS to -KBMMW_STRINGCHARLENOFS do
              c:=c xor ord(s[i]);
          s:=s+format('X%0.2x'+EOL,[c]);    // 1+2+CR+LF = 5 bytes.
        setlength(result,length(s));
        for i :=  to length(s) do
           result[i-]:=ord(s[i]);

end;

function kbmMWCrossScoketGetVerificationHeader(buff:pointer;len:integer):integer;
var
   s,s1:string;
   c,c1:byte;
   i:integer;
   pb:pbyte;
const
   SINVDATA = 'Invalid data';
begin
     Result:=;                             // Satisfy compiler.
     c1:=;
     s:='';
     try

       pb:=buff;
        for I :=  to  do
          s:=s+chr((pb+i)^);

             // Extract checksum.
             try
                s1:=copy(s,,);
                c1:=strtoint(s1);
             except
                kbmMWRaiseException(KBMMW_ERR_TRANSPORT_INVALIDDATA,SINVDATA);
             end;

             // Calculate checksum.
             c:=;
             for i:=KBMMW_STRINGCHAROFS to -KBMMW_STRINGCHARLENOFS do
                 c:=c xor ord(s[i]);

             // Match?
             if c<>c1 then
                exit;
                //kbmMWRaiseException(KBMMW_ERR_TRANSPORT_INVALIDDATA,SINVDATA);

             // Extract size.
             s1:=copy(s,,);
             try
                Result:=strtoint(s1);
             except
               exit;

               // kbmMWRaiseException(KBMMW_ERR_TRANSPORT_INVALIDDATA,SINVDATA);
             end;

     except
         kbmMWDebugDumpMemory(mwdlAdvanced,mwdtTransport,kbmMWDebugWhere,'Exception during iocp verification',
          PByte(s),ByteLength(s));
        raise;
     end;
end;

constructor Txalionserver.Create;
begin
  inherited;
   FSocket :=
    {$IFDEF __SSL__}
    TCrossSslSocket
    {$ELSE}
    TCrossSocket
    {$ENDIF}
    .Create();
  //FSocket.OnConnected := OnConnected;
  FSocket.OnReceived := OnReceived;
end;

destructor Txalionserver.Destroy;
begin
   FSocket.Free;
  inherited;
end;

procedure Txalionserver.OnReceived(Sender: TObject; AConnection: ICrossConnection; ABuf: Pointer; ALen: Integer);

var

  headlen:integer;// 校验为 21 ，不校验为4

   retl,i, j,inlen:integer;

   cStreamClass:TkbmMWCustomTransportStreamClass;
   OutStream:IkbmMWCustomResponseTransportStream;
   InStream:IkbmMWCustomRequestTransportStream;
   stamp:int64;
   AInfo:ikbmMWServerTransportInfo;//IkbmMWCustomTransportInfo;
   indata:pbyte;
   retdata:Tbytes;

   sr,query,spath,s:String;
   vt:word;

   bsize:tbytes;

   rethead:Tbytes;
   inStreamFormat:string;
begin

     inStreamFormat:=TxalionTransport(FTransport).StreamFormat;
     if   (inStreamFormat<>'STANDARD')  then
     begin
         raise Exception.Create('Only support STANDARD StreamFormat.');
     end;
     //           begin

                   if TxalionTransport(FTransport).VerifyTransfer then
                      begin
                       headlen:=;

                       if kbmMWCrossScoketGetVerificationHeader(abuf,alen)<>(alen-headlen) then  //21为校验的头

                          begin
                            AConnection.SendBytes(Tencoding.UTF8.GetBytes('Invalid data'));
                             exit;
                          end;

                      end
                      else
                        begin
                          headlen:=;
                        end;

       stamp:=TkbmMWTiming.GetTimeUS;
       aInfo:=TkbmMWServerTransportInfo.Create;
       cStreamClass:=TxalionTransport(FTransport).FControllerClass.CheckGetStreamClass(mwmtResponse);
       OutStream:=TkbmMWCustomResponseTransportStream(cStreamClass.Create(FTransport,AInfo));

       cStreamClass:=TxalionTransport(FTransport).FControllerClass.CheckGetStreamClass(mwmtRequest);
       InStream:=TkbmMWCustomRequestTransportStream(cStreamClass.Create(FTransport,AInfo));
       InStream.RemoteLocation:=AConnection.PeerAddr;// Client.PeerIP;

       inlen:=alen-headlen;

         try
              if inlen> then
                    begin
                      InStream.DataStream.Clear;
                      InStream.DataStream.SetSize( inlen);
                      indata:=pbyte(abuf);
                      inc(indata,headlen);
                      move(indata^,InStream.DataStream.Memory^,inlen);
                    end;

                TProtServer(FServer).InternalServeStream(FTransport,InStream,OutStream);
                TProtServer(FServer).UpdateGlobalStats(InStream,OutStream,stamp);

                 // Send response back.

                retl:=OutStream.DataStream.Size;
                if TxalionTransport(FTransport).VerifyTransfer then
                    begin
                     rethead:=kbmMWCrossScoketPutVerificationHeader(retl);
                     AConnection.SendBytes(rethead);

                   //  client.Send(rethead[0],headlen);
                    end
                    else
                      begin

                          SetLength(bSize,);
                          bSize[]:=(retl shr (++)) and ;
                          bSize[]:=(retl shr (+)) and ;
                          bSize[]:=(retl shr ()) and ;
                          bSize[]:=retl and ;

                          AConnection.SendBytes(bsize);
                          //client.Send(bsize[0],4);
                      end;

                  setlength(retdata,retl);
                  move(OutStream.DataStream.Memory^,retdata[],retl);
                  AConnection.SendBytes(retdata);

                  except
                     on E: Exception do
                     begin
                      {$ifdef httpsyslog}
                         Log.Warn('Find error.'+e.Message );
                         log.Warn('info:'+TkbmMWPlatformMarshal.memory2String(indata,inlen));
                      {$endif}

                       AConnection.SendBytes(Tencoding.UTF8.GetBytes(e.Message));

                   //    client.Send(e.Message);

                     end;
                  end;

end;
{ TkbmMWCustomhttpsysServerTransport }

procedure TkbmMWCustomCrossScoketServerTransport.Close;
begin

     if state=mwtrstDisconnected then   exit;

     FCrossScoketServer.FSocket.DisconnectAll;

//      Fiocpserver.fiocpServer.Stop;
      SetState(mwtrstDisconnected);
end;

constructor TkbmMWCustomCrossScoketServerTransport.Create(AOwner: TComponent);
begin
  inherited;

   FCrossScoketServer:= TxalionServer.Create;

   Fhost:='0.0.0.0';
   Fport:=;

   self.VerifyTransfer:=True;

   fversion:=sysversion;

end;

destructor TkbmMWCustomCrossScoketServerTransport.Destroy;
begin
   if FCrossScoketServer<>nil then
      freeandnil(FCrossScoketServer);
  inherited;
end;

class function TkbmMWCustomCrossScoketServerTransport.IsConnectionlessTransport: boolean;
begin
           Result:=False;
end;

function TkbmMWCustomCrossScoketServerTransport.IsListening: boolean;
begin
          Result:=(state=mwtrstListening);
end;

class function TkbmMWCustomCrossScoketServerTransport.IsSerializedTransport: boolean;
begin
           Result:=true;
end;

procedure TkbmMWCustomCrossScoketServerTransport.Listen;

begin
  inherited;

    if state=mwtrstListening then   exit;

     FCrossScoketserver.FServer:=server;
     FCrossScoketserver.FTransport:=self;
     FCrossScoketserver.FSocket.Listen(Fhost,Fport);
     SetState(mwtrstListening);

end;

{$ifdef httpsyslog}
initialization
     filelogmgr:=TkbmMWLocalFileLogManager.Create('./kbmmwlog.txt'); // ，一个是日志文件
     filelogmgr.FileOptions:=[mwlfoDeleteOldLog];//:=true; // 删除老的日志文件
     filelogmgr.FlushInterval:=; // 写文件时间间隔，0 为立即写文件
     Log.LogManager:=filelogmgr; //
     log.Info('Start logging!');

{$endif}

把以上代码注册成控件并安装。

打开kbmmw 自带的例子 ，位置如图：

然后把原来的indy Transport 换成 我们新作的Transport.

服务端就ok了，我们可以编译运行，如图：

由于这是标准的tcp 传输协议，我们在客户段就直接使用indy 的代码（官方自带的）。

打开后，直接运行。

连接服务器，正常工作。windows 上没有任何问题。

在linux 下，我们可以参照这一篇 文章，把indy transport

换成 delphi-cross-socket transport 就可以了，其他的都不用动。就可以实现Linux 下运行的kbmmw server 了。

一下子直接跨三个平台。太爽了。

在此再次感谢开源delphi-cross-socket 的大牛兄弟。