Delphi - Indy (IDHTTP) 保持 session

Question

好的，我已经动态创建了 Idhttp，如下所示

procedure TForm1.Button1Click(Sender: TObject);
Var
   Resp : String;
begin
     Resp := webSession('https://www.website.com'); // HTTPS site requires session to keep alive
     if Length(Resp)>0 then
        MessageDlg('Got the body ok',mtInformation,[mbOk],0);
end;

function TForm1.webSession(sURL : ansistring) : ansistring;
var
   SStream    : Tstringstream;
   HTTPCon    : TIdHTTP;
   AntiFreeze : TIdAntiFreeze;
   CompressorZLib: TIdCompressorZLib;
   ConnectionIntercept: TIdConnectionIntercept;
   SSLIOHandlerSocketOpenSSL: TIdSSLIOHandlerSocketOpenSSL;
   CookieManager: TIdCookieManager;
begin
    CompressorZLib :=  TIdCompressorZLib.Create;
    ConnectionIntercept :=TIdConnectionIntercept.Create;
    SSLIOHandlerSocketOpenSSL :=  TIdSSLIOHandlerSocketOpenSSL.Create;
     Result := '';
     if Length(SettingsForm.edtProxyServer.text) >= 7 then  // 0.0.0.0
     Try
        SStream := NIL;
        AntiFreeze := NIL;
        HTTPCon := NIL;
        Try
           SStream := tstringstream.Create('');
           { Create & Set IdHTTP properties }
           HTTPCon := TIdHTTP.create;
           HTTPCon.AllowCookies:=true;
           HTTPCon.CookieManager :=CookieManager;
           HTTPCon.Compressor := CompressorZLib;
           HTTPCon.Intercept := ConnectionIntercept;
           HTTPCon.IOHandler := SSLIOHandlerSocketOpenSSL;
           HTTPCon.HandleRedirects := true;
           { Check Proxy }
           if checkproxy('http://www.google.com') then
           Begin
                HTTPCon.ProxyParams.ProxyServer := SettingsForm.edtProxyServer.text;
                HTTPCon.ProxyParams.ProxyPort := StrToInt(SettingsForm.edtProxyPort.Text);
                HTTPCon.ProxyParams.BasicAuthentication := True;
                HTTPCon.ProxyParams.ProxyUsername := SettingsForm.edtProxyServer.Text;
                HTTPCon.ProxyParams.ProxyPassword := SettingsForm.edtProxyUserName.Text;
           End;
           { Create another AntiFreeze - only 1/app }
           AntiFreeze := TIdAntiFreeze.Create(nil);
           AntiFreeze.Active := true;
           HTTPCon.Get(sURL,SStream);
           Result := UTF8ToWideString(SStream.DataString);
        Finally
           If Assigned(HTTPCon) then FreeAndNil(HTTPCon);
           If Assigned(AntiFreeze) then FreeAndNil(AntiFreeze);
           If Assigned(SStream) then FreeAndNil(SStream);
           If Assigned(CookieManager) then FreeAndNil (CookieManager );
           If Assigned(CompressorZLib) then FreeAndNil (CompressorZLib );
           If Assigned(ConnectionIntercept) then FreeAndNil (ConnectionIntercept );
           If Assigned(SSLIOHandlerSocketOpenSSL) then FreeAndNil (SSLIOHandlerSocketOpenSSL);

        End;
     Except
        { Handle exceptions }
        On E:Exception do
           MessageDlg('Exception: '+E.Message,mtError, [mbOK], 0);
     End;
end;

function TForm1.checkproxy(sURL : ansistring) : boolean;
var
   HTTPCon : TIdHTTP;
   AntiFreeze : TIdAntiFreeze;
begin
     Result := False;
     Try
        { Inti vars }
        AntiFreeze := NIL;
        HTTPCon := NIL;
        Try
           { AntiFreeze }
           AntiFreeze := TIdAntiFreeze.Create(NIL);
           AntiFreeze.Active := true;
           { Create & Set IdHTTP properties }
           HTTPCon := TIdHTTP.Create(NIL);
           HTTPCon.ProxyParams.ProxyServer := SettingsForm.edtProxyServer.text;
           HTTPCon.ProxyParams.ProxyPort := StrToInt(SettingsForm.edtProxyPort.Text);
           HTTPCon.ProxyParams.BasicAuthentication := True;
           HTTPCon.ProxyParams.ProxyUsername := SettingsForm.edtProxyServer.Text;
           HTTPCon.ProxyParams.ProxyPassword := SettingsForm.edtProxyUserName.Text;
           HTTPCon.HandleRedirects := true;
           HTTPCon.ConnectTimeout := 1000;
           HTTPCon.Request.Connection := 'close';
           HTTPCon.Head(sURL);
        Finally
           { Cleanup }
           if Assigned(HTTPCon) then
           Begin
                { Return Success/Failure }
                Result := HTTPCon.ResponseCode = 200;
                If HTTPCon.Connected then HTTPCon.Disconnect;
                FreeAndNil(HTTPCon);
           End;
           if Assigned(AntiFreeze) then FreeAndNil(AntiFreeze);
        End;
     Except
        On E:EIdException do ;
        { Handle exceptions }
        On E:Exception do
           MessageDlg('Exception: '+E.Message,mtError, [mbOK], 0);
     End;
end;

我有一个网站，要求我保持 session 事件。我该怎么做？使用与上面类似的代码。

如果我为所有内容创建一个可视组件，并使用它，一切都很棒，但是当我动态创建该组件时(我真的想以这种方式保留它)，它无法使 session 保持事件状态。

感谢任何帮助。

Answer 1

我没有看到你在哪里实例化 CookieManager，但那是你应该跟踪 session 的地方。服务器将发送一些代表当前 session 的 cookie，并且您发送到服务器的所有进一步请求都应包含该 cookie，以便服务器知道要使用哪个 session 。

您必须在 session 期间保留 cookie 管理器对象，或者必须将其数据保存在其他位置，然后在每次创建新的 cookie 管理器对象时重新加载它。我更喜欢前者。事实上，您可能会考虑保留整个 HTTP 对象。