Antwort: RE: Antwort: AW: ascii-socket problem with umlaut

> Hello,
>
> I open my socket with the following code:
>
> | host port connection |
> ...
>
>         host := 'localhost'.
>
>         "Try to get port from services-file of the pc.
>         if not then use default-value"
>         Signal errorSignal handle:
>                 [:ex |
>                 Transcript
>                         show: ex description;
>                         cr.
>                 port := 49700]
>                 do: [
>                         port := IPSocketAddress servicePortByName:
> 'TestSocket'].
>
>         Signal errorSignal handle:
>                         [:ex |
>                         Transcript
>                                 show: 'socket connection failed';
>                                 cr.
>                         ^false]
>                 do:
>                         ["Create a socket on the given host and port."
>
>                         socket := SocketAccessor newTCPclientToHost: host
>                                                 port: (port)].  "Open a
> two-way connection on the socket."
>         connection := ExternalConnection new.
>         connection
>                 input: socket;
>                 output: socket. "Open a stream on the socket connection."
>         stream := connection readAppendStream.
>         ...
>
> Mit freundlichen Grüßen - best regards,
>
> Peter Dziedzic
>
> --------------------------------------
>
> Carl Zeiss Industrielle Meßtechnik GmbH/ Industrial Metrology
> Softwareentwicklung/Software Development
>
> P e t e r  D z i e d z i c
>
> 73446 Oberkochen, Germany
>
> tel: +49 73 64 20-84 48
> fax: +49 73 64 20-48 00
> e-mail: [hidden email]
> http://www.zeiss.de/imt
>
> Carl Zeiss Industrielle Messtechnik GmbH
> Carl-Zeiss-Straße 22, 73447 Oberkochen
> Aufsichtsratsvorsitzender: Dr. Dieter Kurz
> Geschäftsführer: Dr. Rainer Ohnheiser, Felix Hoben, Hanspeter Mürle
> Sitz der Gesellschaft: 73446 Oberkochen, Deutschland
> Amtsgericht Ulm, HRB 501561, USt-IdNr.: DE 811 515 346
>
>
>
>
>
>
> "Steven Kelly" <[hidden email]>
> Gesendet von: [hidden email]
> 25.02.2010 10:58
>
> An
> "Dziedzic, Peter" <[hidden email]>
> Kopie
> <[hidden email]>
> Thema
> RE: [vwnc] Antwort: AW:  ascii-socket problem with umlaut
>
>
>
>
>
>
> That might work, but it’s not right :-). #asByteString will try to read
> the UTF-8 bytes as if they were ISO-8859-1 bytes; in this case that may
> succeed, but in general you shouldn’t try to read with a different
> encoding than you used when writing: it will often give errors, because
> not all sequences of bytes are legal in all encodings.
>  
> You need to change the encoding of the socket stream, which will mean that
> when you send a Ü character, it is automatically converted into the right
> sequence of UTF-8 bytes. You can supply the encoding to the socket when
> you create it. If the code I sent before:
> readStream := (aSocket asExternalConnection withEncoding: #'UTF-8')
> readStream lineEndCRLF
> doesn’t look similar enough to how you’re currently opening your socket
> stream, tell us the code you are using and we’ll tell you where to add the
> encoding command.
>  
> Steve
>  
> From: [hidden email] [mailto:[hidden email]] On Behalf
> Of Dziedzic, Peter
> Sent: 25 February 2010 11:40
> To: Georg Heeg
> Cc: [hidden email]
> Subject: [vwnc] Antwort: AW: ascii-socket problem with umlaut
>  
>
> Hello,
>
> the default-encoder in my smalltalk-application is #ISO8859_1 (  'Ü'
> stringEncoding streamEncodingType ).
>
> Do i have to convert the string with the following code in my smalltalk
> enviroment to utf8?
>
>  stringToSend := (stringToSend asByteArrayEncoding:#utf8) asByteString
>
> Is this correct for the smalltalk side?
>
> Mit freundlichen Grüßen - best regards,
>
> Peter Dziedzic
>
> --------------------------------------
>
> Carl Zeiss Industrielle Meßtechnik GmbH/ Industrial Metrology
> Softwareentwicklung/Software Development
>
> P e t e r  D z i e d z i c
>
> 73446 Oberkochen, Germany
>
> tel: +49 73 64 20-84 48
> fax: +49 73 64 20-48 00
> e-mail: [hidden email]
> http://www.zeiss.de/imt
>
> Carl Zeiss Industrielle Messtechnik GmbH
> Carl-Zeiss-Straße 22, 73447 Oberkochen
> Aufsichtsratsvorsitzender: Dr. Dieter Kurz
> Geschäftsführer: Dr. Rainer Ohnheiser, Felix Hoben, Hanspeter Mürle
> Sitz der Gesellschaft: 73446 Oberkochen, Deutschland
> Amtsgericht Ulm, HRB 501561, USt-IdNr.: DE 811 515 346
>
>
>
>
>
> "Georg Heeg" <[hidden email]>
> Gesendet von: [hidden email]
> 25.02.2010 09:12
>
>
> An
> "'Dziedzic, Peter'" <[hidden email]>, "'VWNC'" <[hidden email]>
> Kopie
>
> Thema
> AW: [vwnc] ascii-socket problem with umlaut
>  
>
>
>
>
>
>
>
>
> Peter,
>  
> Last Sunday I commented in this list in an email entitled “Postgres
> 'ERROR: invalid byte sequence for encoding             "UTF8": 0xe97269”
> about the same problem. Thus here you’ll find only a short version:
>  
> Sockets provide a communication as a sequence of bytes. Thus characters
> (in Smalltalk Strings are sequences of Character objects) are encoded as
> bytes using en encoder. In your code the default encoder is implicitly
> used. I can only guess that this encoder might be UTF-8 or MSCP1252 or
> ISO8859-L1. You can find out easily by debugging the Smalltalk expression.
>  
> I have no idea about the C# side. I guess C# is using MSCP1252 or UTF16.
>  
> What I would do?
> 1.      Find out which encoder what side uses
> 2.      Adapt both sides to use the same encoder explicitly
> 3.      As your application is used world-wide, I would rather prefer
> UFT-8 (if most of your customers are using Latin character sets) or UTF16
> otherwise.
>  
> Georg
>  
> PS: The character set ASCII you mention in the subject line cannot encode
> umlauts at all.
>  
> Georg Heeg eK, Dortmund und Köthen, HR Dortmund A 12812
> Tel. +49-3496-214328, Fax +49-3496-214712
> Von: [hidden email] [mailto:[hidden email]] Im Auftrag
> von Dziedzic, Peter
> Gesendet: Donnerstag, 25. Februar 2010 08:54
> An: VWNC
> Betreff: [vwnc] ascii-socket problem with umlaut
>  
>
> Hello,
>
> i have a problem with my ascii socket when i send german "Umlaute": e.g. Ü
> Ö Ä.
>
> I have a smalltalk application that communicates with a C#-appliacation
> over a Ascii-Socket.
>
> In Smalltalk i use stream nextPutAll: aString; and stream nextLine.
> In C# I use sr = new StreamReader(stream);withsr.ReadLineand
> sw = newStreamWriter(stream); with sw.WriteLine.
>
> How can i fix this problem? Is the problem the smalltalk or the C#-side?
>
> Mit freundlichen Grüßen - best regards,
>
> Peter Dziedzic
>
> --------------------------------------
>
> Carl Zeiss Industrielle Meßtechnik GmbH/ Industrial Metrology
> Softwareentwicklung/Software Development
>
> P e t e r  D z i e d z i c
>
> 73446 Oberkochen, Germany
>
> tel: +49 73 64 20-84 48
> fax: +49 73 64 20-48 00
> e-mail: [hidden email]
> http://www.zeiss.de/imt
>
> Carl Zeiss Industrielle Messtechnik GmbH
> Carl-Zeiss-Straße 22, 73447 Oberkochen
> Aufsichtsratsvorsitzender: Dr. Dieter Kurz
> Geschäftsführer: Dr. Rainer Ohnheiser, Felix Hoben, Hanspeter Mürle
> Sitz der Gesellschaft: 73446 Oberkochen, Deutschland
> Amtsgericht Ulm, HRB 501561, USt-IdNr.: DE 811 515 346
>
>
>
>
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