我是一名新手Delphi程序员,需要编写一个SOAP客户端。导入WSDL会生成以下代码(显然我不能更改,因为必须遵守服务器端的规定)
DataPart = class;
Message = class;
eMessage = class;
eventType = ( send, delete, etc );
DataPart = class(TRemotable)
private
FhasData: Boolean;
Fdata: TByteDynArray;
published
property hasData: Boolean read FhasData write FhasData;
property data: TByteDynArray read Fdata write Fdata;
end;
Message = class(TRemotable)
private
FMessageID: Int64;
Ftimestamp: TXSDateTime;
Fevent: eventType;
FmagicNumber: WideString;
FDataPart: DataPart;
published
property MessageID: Int64 read FMessageID write FMessageID;
property timestamp: TXSDateTime read Ftimestamp write Ftimestamp;
property event: eventType read Fevent write Fevent;
property magicNumber: WideString read FmagicNumber write FmagicNumber;
property DataPart: DataPart read FDataPart write FDataPart;
end;
eMessage = class(TRemotable)
private
FencryptedMessage: TByteDynArray;
Fdata: DataPart;
published
property encryptedMessage: TByteDynArray read FencryptedMessage write FencryptedMessage;
property data: DataPart read Fdata write Fdata;
end;
MyApplicationPortType = interface(IInvokable)
['{99767D33-6B4A-7547-4DAC-0608095CAC70}']
function sendMessage(const encryptedMessage: TByteDynArray; const data: DataPart): WideString; stdcall;
end;
有没有人能给我编写一个带有虚拟值的示例,调用sendMessage()而不会导致访问冲突?我真的不知道如何处理TByteDynArray
[编辑]按照要求,这是我的代码,但是 - 免责声明 - 在发布之前,我必须对其进行大量修改(缩小)。 sendMessage()的两个参数都非空
var theMessageArray: TByteDynArray;
theResult : WideString;
messageData : TByteDynArray;
i : Integer;
begin
theMessage.messageID := theMessage.messageID + 1;
theMessage.timestamp := TXSDateTime.Create();
theMessage.timestamp.AsDateTime := Now();
theMessage.event := delete;
theMessage.magicNumber := 'magic # ' + IntToStr(theMessage.messageID);
SetLength(messageData, 1);
messageData[0] := 0;
theMessage.dataPart.hasData := True;
messageData := theMessage.dataPart.messageData;
SetLength(messageData, $1000 * dataSize);
for i := 0 to $1000 * dataSize - 1 do
messageData[i] := i and $FF;
theMessage.DataPart.messageData := messageData;
theMessageArray := TByteDynArray(theMessage);
theResult := (HTTPRIO1 as MyApplicationPortType).sendMessage(theMessageArray, theMessage.dataPart);
theMessageArray := TByteDynArray(theMessage);
这个变量不是一个动态数组;类型转换不会使它成为一个动态数组。赋值语句将尝试增加所谓数组的引用计数,甚至可能在不崩溃的情况下运行。之后,sendMessage
尝试将该内存用作数组。它读取“长度”,并尝试访问那么多字节。那个长度并不准确反映有多少字节存在,或者也许引用计数修改已经破坏了内存。经验法则:如果你对一个动态数组进行类型转换,那么就出现了问题。 - Rob Kennedy