[英]Delphi 2007 & Updated Indy 10
I am sending alright files (doc, pdf, xls) with english filenames but when I am sending files with greek filenames I am getting on server side ????????? 我正在发送带有英文文件名的文件(doc,pdf,xls),但是当我发送带有希腊文件名的文件时,我正在服务器端上面????????? characters for filename & the error message Socket Error 10053, software caused connection abort.
文件名和错误消息的字符Socket Error 10053,软件导致连接中止。 Is there a solution for this kind of problem.
是否有解决此类问题的方法。
Code: 码:
procedure TForm1.LoadFileButtonClick(Sender: TObject);
begin
OpenDialog1.Filter := 'All Files (*.*)';
OpenDialog1.FilterIndex := 1;
if OpenDialog1.Execute then
begin
Edit1.Text := ExtractFileName(OpenDialog1.FileName);
Edit3.Text := OpenDialog1.FileName;
Fstream := TFileStream.Create(OpenDialog1.FileName, fmopenread);
Edit2.Text := inttostr(Fstream.Size);
Fstream.Position := 0;
FreeandNil(FStream);
//Fstream.Free;
end;
end;
procedure TForm1.SendFileButtonClick(Sender: TObject);
var
IncommingText: string;
begin
if (opendialog1.filename<>'') and (CheckBox1.Checked = True) then begin
IdTCPClient1.iohandler.writeln(edit1.text + '@' + edit2.text + ';' + edit3.text + ',');
Sleep(2000);
try
IdTCPClient1.IOHandler.largestream:=true;
Fstream := TFileStream.Create(OpenDialog1.FileName, fmopenread);
IdTCPClient1.IOHandler.Write(Fstream, 0 ,true);
finally
Fstream.Position := 0;
FreeandNil(FStream);
//Fstream.Free;
memo1.Lines.Add('File Sent');
IncommingText := IdTCPClient1.iohandler.readln;
if IncommingText = 'DONE!' then begin
Memo1.Lines.Add('File ' +Edit1.Text +' ' +Edit2.Text +' was received successfully by the Server');
//APPLICATION.ProcessMessages;
end else begin Memo1.Lines.Add('File ' +Edit1.Text +' was not received by the Server'); end;
end; //try - finally
end else begin
showmessage('Please choose a file Or Try to connect to the Server');
end;
end;
Indy's default text encoding is ASCII (because the majority of Internet protocols are still largely ASCII based, unless they define extra extensions to support Unicode). Indy的默认文本编码是ASCII(因为大多数Internet协议仍主要基于ASCII,除非它们定义额外的扩展以支持Unicode)。 That is why you are getting
?
这就是你得到的原因
?
for non-ASCII characters. 对于非ASCII字符。 To send non-ASCII characters, you need to tell Indy which text encoding to use that is compatible with the characters you are exchanging.
要发送非ASCII字符,您需要告诉Indy要使用的文本编码与您要交换的字符兼容。 UTF-8 is usually the best choice for that.
UTF-8通常是最佳选择。 There are three ways you can do that:
有三种方法可以做到这一点:
set the global GIdDefaultTextEncoding
variable in the IdGlobal
unit. 在
IdGlobal
单元中设置全局GIdDefaultTextEncoding
变量。 It is set to encASCII
by default, you can set it to encUTF8
instead: 它默认设置为
encASCII
,您可以将其设置为encUTF8
:
procedure TForm1.FormCreate(Sender: TObject); begin GIdDefaultTextEncoding := encUTF8; end;
set the TIdIOHandler.DefStringEncoding
property to TIdTextEncoding.UTF8
(or IndyTextEncoding_UTF8
if you are using Indy 10.6+): 将
TIdIOHandler.DefStringEncoding
属性设置为TIdTextEncoding.UTF8
(如果使用的是Indy IndyTextEncoding_UTF8
则设置为TIdIOHandler.DefStringEncoding
):
procedure TForm1.IdTCPClient1Connected(Sender: TObject); begin IdTCPClient1.IOHandler.DefStringEncoding := TIdTextEncoding.UTF8; // or: // IdTCPClient1.IOHandler.DefStringEncoding := IndyTextEncoding_UTF8; end;
pass TIdTextEncoding.UTF8
(or IndyTextEncoding_UTF8
) directly to the AByteEncoding
parameter of WriteLn()
: 通过
TIdTextEncoding.UTF8
(或IndyTextEncoding_UTF8
直接地)到AByteEncoding
的参数WriteLn()
IdTCPClient1.IOHandler.WriteLn(..., TIdTextEncoding.UTF8); // or: // IdTCPClient1.IOHandler.WriteLn(..., IndyTextEncoding_UTF8);
Keep in mind that you are using an Ansi version of Delphi, where string
maps to AnsiString
, and thus Indy has to perform an additional Ansi-to-Unicode conversion of AnsiString data before it can then apply the specified text encoding to produce the bytes it transmits. 请记住,您使用的是Ansi版本的Delphi,其中
string
映射到AnsiString
,因此Indy必须对AnsiString数据执行额外的Ansi-to-Unicode转换,然后才能应用指定的文本编码来生成字节数传输。 Typically, Indy uses the OS's default Ansi encoding to handle that initial conversion (so if your AnsiString
data is Greek encoded, and your OS is set to Greek, you will be fine), however you can use the TIdIOHandler.DefAnsiEncoding
property, or the ASrcEncoding
parameter of WriteLn()
, if you need to specify that your AnsiString
data is using a different encoding. 通常,Indy使用操作系统的默认Ansi编码来处理初始转换(因此,如果您的
AnsiString
数据是希腊语编码,并且您的操作系统设置为希腊语,那么您会没问题),但是您可以使用TIdIOHandler.DefAnsiEncoding
属性,或者ASrcEncoding
WriteLn()
ASrcEncoding
参数,如果您需要指定您的AnsiString
数据使用不同的编码。
As for your socket error, without seeing a call stack leading up to the error, or at least which line of your code is raising it, that is difficult to troubleshoot. 至于你的套接字错误,没有看到导致错误的调用堆栈,或者至少代码的哪一行提升它,这很难排除故障。 My guess is that it is related to you calling
ReadLn()
inside of the finally
block regardless of whether WriteLn()
or Write()
actually succeeded. 我的猜测是,无论
WriteLn()
或Write()
实际上是否成功,它都与你在finally
块中调用ReadLn()
有关。 That code needs to be moved out of the finally
block, it does not belong there. 该代码需要移出
finally
块,它不属于那里。
Try something more like this instead: 尝试更像这样的东西:
procedure TForm1.LoadFileButtonClick(Sender: TObject);
begin
OpenDialog1.Filter := 'All Files (*.*)';
OpenDialog1.FilterIndex := 1;
if OpenDialog1.Execute then
begin
Edit1.Text := ExtractFileName(OpenDialog1.FileName);
Edit3.Text := OpenDialog1.FileName;
// Indy has its own FileSizeByName() function...
Edit2.Text := IntToStr(FileSizeByName(OpenDialog1.FileName));
end;
end;
procedure TForm1.SendFileButtonClick(Sender: TObject);
var
IncommingText: string;
Strm: TFileStream;
begin
if not CheckBox1.Checked then
begin
ShowMessage('Please connect to the Server');
Exit;
end;
if OpenDialog1.FileName = '' then
begin
ShowMessage('Please choose a file');
Exit;
end;
Strm := TFileStream.Create(OpenDialog1.FileName, fmOpenRead);
try
IdTCPClient1.IOHandler.WriteLn(Edit1.Text + '@' + Edit2.Text + ';' + Edit3.Text + ',', TIdTextEncoding.UTF8);
IdTCPClient1.IOHandler.LargeStream := True;
IdTCPClient1.IOHandler.Write(Strm, 0 , True);
finally
Strm.Free;
end;
Memo1.Lines.Add('File Sent');
IncommingText := IdTCPClient1.IOHandler.ReadLn;
if IncommingText = 'DONE!' then begin
Memo1.Lines.Add('File ' + Edit1.Text + ' ' + Edit2.Text + ' was received successfully by the Server');
//APPLICATION.ProcessMessages;
end else
begin
Memo1.Lines.Add('File ' + Edit1.Text + ' was not received by the Server');
end;
end;
Lastly, just an FYI, you are setting the AWriteByteCount
parameter of Write()
to True, so it is going to transmit the stream size (as an Int64
because of LargeStream=True
) before then sending the TStream
data, so putting the file size in the WriteLn()
data is redundant. 最后,只是一个FYI,您将
Write()
的AWriteByteCount
参数设置为True,因此它将传输流大小(因为LargeStream=True
而作为Int64
),然后发送TStream
数据,因此放入文件大小在WriteLn()
数据中是多余的。
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