Maybe it's specific for MM1 with which I'm so concerned, that I often
forget about existence of other protocols ;-) However, fast google in
the morning led me to the following:
1. OMA-MMS-ENC-V1_2:
(BNF)
Subject-value = Encoded-string-value
Encoded-string-value = Text-string | Value-length Char-set Text-string
The Char-set values are registered by IANA as MIBEnum value. UTF-8
character-set encoding SHOULD be supported in Encoded-string-value. If
the MMS Client uses UTF-8 character-set encoding, the Char-set
parameter SHOULD be used to indicate its usage. Encoding according to
[RFC2047] MAY be supported in the MMS Client and/or MMS
Proxy-Relay. Encoding according to [RFC2047] SHOULD only be used
without "Value-length Char-set" parameters. [RFC2047] encoding for
UTF-8 character- set encoding MAY be supported in the MMS Client
and/or MMS Proxy-Relay. Note: The usage of Unicode character-set
encoding is recommended. The supported set of actual character-sets in
the MMS Client is up to the implementation. The MMS Client must not
rely on the MMS Proxy-Relay doing any character-set transformation.
2. WAP-203-WSP:
Table 42. Character Set Assignment:
utf-8: 0x6a
3. tcpdumps (my comments is just guessing for now):
incoming to mbuni from handset with utf-8 (I hope so - polish
characters properly decoded) encoded subject:
0x96: start of subject field
0x16 0xea: looks like encoding indication for me, doesn't match utf-8
above, I'm not sure, why
0x20: space ... maybe UA inserts it
0xc5 0xbb: first UTF-8 encoded character
outgoing from mbuni to handset (UTF-8 chars are badly decoded on
handset):
0x96: start of subject field
0x7f: don't know what's this
0xc5 0xbb: first UTF-8 encoded character
On Thu, Nov 25, 2010 at 12:56:13PM +0300, Paul Bagyenda wrote:
> How should the charset information be encoded?
> On Nov 25, 2010, at 12:34, Piotr Isajew wrote:
>
> > Hi,
> >
> > Is there any way to properly use Send MMS service to send MMS message
> > with UTF-8 encoded subject?
> >
> > I tried both passing raw utf-8 string as 'subject' parameter of get
> > request and encoding it according to RFC-2047 before.
> >
> > From tcpdump it looks for me that no charset information is encoded in
> > Subject field.
> >
> > Regards,
> >
> > Piotr
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