kbmmw 5.0 中的REST 服務

目前關於REST 服務的話題越來越熱，kbmmw 在5.0 里面開始支持rest。今天我就試一下kbmmw 的

rest 服務。閑話少說，開始。

老規矩，放上兩個kbmMWServer1和 kbmMWHTTPSysServerTransport1兩個控件。

設置kbmMWHTTPSysServerTransport1的server 屬性。urls 屬性默認是http://+:80/, 我們在這里就不改了。

因為我們后面采用的是samrtservice. 因此現在在主窗體里面不用再操心后面有什么服務要注冊了。只需要一句話就

ok了。

procedure TForm2.Button1Click(Sender: TObject);
begin
     kbmMWServer1.Active:=True;
end;

procedure TForm2.FormCreate(Sender: TObject);
begin
    kbmMWServer1.AutoRegisterServices;
end;

主窗體就ok 了。

接下來我們來建服務模塊

選擇這個smartservice

記住這里要填成你定義的這個服務名。然后一路點過去。

默認生成的代碼如下：

type

  [kbmMW_Service('name:xalionservice, flags:[listed]')]
  [kbmMW_Rest('path:/xalionservice')]
  // Access to the service can be limited using the [kbmMW_Auth..] attribute.
  // [kbmMW_Auth('role:[SomeRole,SomeOtherRole], grant:true')]

  TkbmMWCustomSmartService1 = class(TkbmMWCustomSmartService)
  private
     { Private declarations }
  protected
     { Protected declarations }
  public
     { Public declarations }
     // HelloWorld function callable from both a regular client,
     // due to the optional [kbmMW_Method] attribute,
     // and from a REST client due to the optional [kbmMW_Rest] attribute.
     // The access path to the function from a REST client (like a browser)+
     // is in this case relative to the services path.
     // In this example: http://.../xalionservice/helloworld
     // Access to the function can be limited using the [kbmMW_Auth..] attribute.
     // [kbmMW_Auth('role:[SomeRole,SomeOtherRole], grant:true')]
     [kbmMW_Rest('method:get, path:helloworld')]
     [kbmMW_Method]
     function HelloWorld:string;
  end;

implementation

uses kbmMWExceptions;

{$R *.dfm}


// Service definitions.
//---------------------

function TkbmMWCustomSmartService1.HelloWorld:string;
begin
     Result:='Hello world';
end;

initialization
  TkbmMWRTTI.EnableRTTI(TkbmMWCustomSmartService1);
end.

這個代碼比較簡單，只是定義了很少的屬性。

 但是已經可以運行了。

直接在瀏覽器里面輸入http://127.0.0.1/xalionservice/helloworld 就可以看到下圖

好，最簡單的rest 服務做好了，我們繼續做更復雜的。

我們加一個輸入字符串，然后回應

  [kbmMW_Method('EchoString')]       // 回應輸入的串
     [kbmMW_Rest('method:get, path: [ "echostring/{AString}","myechostring/{AString}" ]')]
     [kbmMW_Auth('role:[SomeRole,SomeOtherRole], grant:true')]
     function EchoString([kbmMW_Rest('value: "{AString}"')] const AString:string):string;


  end;

implementation

uses kbmMWExceptions;

{$R *.dfm}


// Service definitions.
//---------------------

function TkbmMWCustomSmartService1.EchoString(const AString: string): string;
begin
     result:='你好！'+astring;
end;

在瀏覽器里面輸入http://127.0.0.1/xalionservice/echostring/xalion

和我們想象的一樣。

繼續加入更復雜的

     [kbmMW_Method]
     [kbmMW_Rest('method:get, path: "cal/addnumbers"')]
     function AddNumbers([kbmMW_Rest('value: "$arg1", required: true')] const AValue1:integer;
                         [kbmMW_Rest('value: "$arg2", required: true')] const AValue2:integer;
                         [kbmMW_Arg(mwatRemoteLocation)] const ARemoteLocation:string):integer;
  end;

implementation

uses kbmMWExceptions;

{$R *.dfm}


// Service definitions.
//---------------------

function TkbmMWCustomSmartService1.AddNumbers(const AValue1, AValue2: integer;
  const ARemoteLocation: string): integer;
begin
       Result:=AValue1+AValue2;
end;

瀏覽器里面可以輸入http://127.0.0.1/xalionservice/cal/addnumbers?arg1=10&arg2=50

很簡單吧.

下面再說一下，服務屬性的常用參數，大家可以根據自己的需要改。

 // server (optional) indicates name of TkbmMWServer instance to register service with. If missing will be registered with all server instances.

  // name (optional) overrides service preferred name.
  // version (optional) overrides service version.
  // minInstances (optional) overrides services minInstances.
  // maxInstances (optional) overrides services maxInstances.
  // flags (optional). Array that can contain: [ listed,runrequireauth,listrequireauth,stateful,persistent,default ]
  // gatherStatistics (optional). Boolean value that can be on/off or true/false.
  // maxIdleTime (optional). Integer indicating max idle time in seconds before non stateful service instance is GC'ed.
  // maxIdleStatefulTime (optional). Integer indicating max idle time in seconds before stateful service instance is GC'ed.
  // timeout (optional). Integer indicating max allowed time of a request in seconds before service instance is GC'ed.
  // dontQueue (optional). Boolean indicating if requests should be queued or not if no instances of the service is available at time of request.
  [kbmMW_Service('name:SMARTDEMO, version:1.0, minInstances:32, maxInstances:128')]

 

 上面做完了，那么如何通過這個REST 服務與前端的JS 顯示庫結合呢？

這個問題就留給各位同學研究吧。