我想使用Delphi 2007将应用程序从Indy 9升级到10。
现在,由于没有找到DecodeToStream,因此不再编译。
该代码使用Bold框架,因为引用了BoldElement。
还有其他可调用的方法吗?
更新(我想我简化了前面的示例)
原始代码:
BlobStreamStr : String;
MIMEDecoder : TidDecoderMIME;
if (BoldElement is TBATypedBlob) then
begin
BlobStreamStr := copy(ChangeValue,pos(']',ChangeValue)+1,maxint);
(BoldElement as TBATypedBlob).ContentType := copy(ChangeValue,2,pos(']',ChangeValue)-2);
MIMEDecoder := TidDecoderMIME.Create(nil);
try
MIMEDecoder.DecodeToStream(BlobStreamStr,(BoldElement as TBATypedBlob).CreateBlobStream(bmWrite));
finally
FreeAndNil(MIMEDecoder);
end;
end
更改后:
BlobStreamStr : String;
MIMEDecoder : TidDecoderMIME;
LStream : TIdMemoryStream;
if (BoldElement is TBATypedBlob) then
begin
BlobStreamStr := copy(ChangeValue, pos(']', ChangeValue) + 1, maxint);
(BoldElement as TBATypedBlob).ContentType := copy(ChangeValue, 2, pos(']',ChangeValue)-2);
MIMEDecoder := TidDecoderMIME.Create(nil);
LStream := TIdMemoryStream.Create;
try
MIMEDecoder.DecodeBegin(LStream);
MIMEDecoder.Decode(BlobStreamStr, 0, Length(BlobStreamStr));
LStream.Position := 0;
ReadTIdBytesFromStream(LStream, DecodedBytes, Length(BlobStreamStr));
// Should memory for this stream be released ??
(BoldElement as TBATypedBlob).CreateBlobStream(bmWrite).Write(DecodedBytes[0], Length(DecodedBytes));
finally
MIMEDecoder.DecodeEnd;
FreeAndNil(LStream);
FreeAndNil(MIMEDecoder);
end;
end
但是我对所有的变化都没有信心,因为我不太了解Indy。因此欢迎所有评论。我不明白的一件事是对CreateBlobStream的调用。我应该与FastMM进行核对,以确保它不是内存泄漏。
最佳答案
使用TIdDecoder.DecodeBegin()是解码为TStream的正确方法。但是,您不需要中间的TIdMemoryStream(BTW,在Indy 10中已经很长时间了,请考虑升级到较新的版本)。您可以改为直接传递Blob流,例如:
var
BlobElement : TBATypedBlob;
BlobStreamStr : String;
BlobStream : TStream;
MIMEDecoder : TidDecoderMIME;
begin
...
if BoldElement is TBATypedBlob then
begin
BlobElement := BoldElement as TBATypedBlob;
BlobStreamStr := Copy(ChangeValue, Pos(']',ChangeValue)+1, Maxint);
BlobElement.ContentType := Copy(ChangeValue, 2, Pos(']',ChangeValue)-2);
BlobStream := BlobElement.CreateBlobStream(bmWrite);
try
MIMEDecoder := TidDecoderMIME.Create(nil);
try
MIMEDecoder.DecodeBegin(BlobStream);
try
MIMEDecoder.Decode(BlobStreamStr);
finally
MIMEDecoder.DecodeEnd;
end;
finally
FreeAndNil(MIMEDecoder);
end;
finally
FreeAndNil(BlobStream);
end;
end;
...
end;
关于delphi - Indy10中的DecodeToStream,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/2028235/