以下代码中:Result := (RIO as SMSInterface); 这句有时会返回nil,不知是什么原因?请各位大侠赐教。unit uSMSInterface;interfaceuses InvokeRegistry, SOAPHTTPClient, Types, XSBuiltIns;type // ************************************************************************ //
// The following types, referred to in the WSDL document are not being represented
// in this file. They are either aliases[@] of other types represented or were referred
// to but never[!] declared in the document. The types from the latter category
// typically map to predefined/known XML or Borland types; however, they could also
// indicate incorrect WSDL documents that failed to declare or import a schema type.
// ************************************************************************ //
// !:string - "http://www.w3.org/2001/XMLSchema"
// !:int - "http://www.w3.org/2001/XMLSchema"
// !:boolean - "http://www.w3.org/2001/XMLSchema"
// ************************************************************************ //
// Namespace : http://DefaultNamespace
// transport : http://schemas.xmlsoap.org/soap/http
// style : rpc
// binding : SMSInterfaceSoapBinding
// service : SMSInterfaceService
// port : SMSInterface
// URL : http://192.168.4.22:8000/SMSInterface.jws
// ************************************************************************ //
SMSInterface = interface(IInvokable)
['{F601AA1B-D865-BA8E-AF68-04E0F4409E67}']
function SMSInterface(const strVersion: WideString; const strIntfData: WideString; const strSMSCode: WideString; const strSignature: WideString): WideString; stdcall;
function exec(const strVersion: WideString; const strIntfData: WideString; const strSMSCode: WideString; const strSignature: WideString): WideString; stdcall;
function getID: Integer; stdcall;
procedure setID(const id: Integer); stdcall;
function getVersion: WideString; stdcall;
function isForVirtualUser: Boolean; stdcall;
function getSMSCode: WideString; stdcall;
function getIntfData: WideString; stdcall;
function getCommandType: WideString; stdcall;
function getReturnCode: Integer; stdcall;
function getReturnDesc: WideString; stdcall;
end;function GetSMSInterface(UseWSDL: Boolean=System.False; Addr: string=''; HTTPRIO: THTTPRIO = nil): SMSInterface;
implementationfunction GetSMSInterface(UseWSDL: Boolean; Addr: string; HTTPRIO: THTTPRIO): SMSInterface;
const
defWSDL = 'http://192.168.4.22:8000/SMSInterface.jws?wsdl';
defURL = 'http://192.168.4.22:8000/SMSInterface.jws';
defSvc = 'SMSInterfaceService';
defPrt = 'SMSInterface';
var
RIO: THTTPRIO;
begin
Result := nil;
if (Addr = '') then
begin
if UseWSDL then
Addr := defWSDL
else
Addr := defURL;
end;
if HTTPRIO = nil then
RIO := THTTPRIO.Create(nil)
else
RIO := HTTPRIO;
RIO.HTTPWebNode.UseUTF8InHeader:=true;
try
Result := (RIO as SMSInterface);
if UseWSDL then
begin
RIO.WSDLLocation := Addr;
RIO.Service := defSvc;
RIO.Port := defPrt;
end else
RIO.URL := Addr;
finally
if (Result = nil) and (HTTPRIO = nil) then
RIO.Free;
end;
end;
initialization
InvRegistry.RegisterInterface(TypeInfo(SMSInterface), 'http://DefaultNamespace', 'UTF-8');
InvRegistry.RegisterDefaultSOAPAction(TypeInfo(SMSInterface), '');end.
if (Result = nil) and (HTTPRIO = nil) then
RIO.Free;
RIO.Free;
这句是delphi自动生成的啊