[web-devel] [Yesod]How to write non-UTF8 encoded web service.

Michael Snoyman michael at snoyman.com
Tue Apr 19 19:17:58 CEST 2011

The UTF-8 assumption is in place in two (I think) places in Yesod:

* The ToContent instances for String, Html, Text... all use UTF-8 encoding.
You'll most likely want to stick to the lazy ByteString instance of
ToContent to ensure you can specify your encoding. (Similarly, the typeHtml,
typePlain... values all include a utf-8 charset identifier.)
* The default query string parsing will assume UTF-8 encoding. I can make
that configurable in the future if there's demand (which it sounds like
there is).

Additionally, path parsing assumes UTF-8. However, my understanding and
experience both say that- while this is not clearly defined in the HTTP
spec- it is what all web browsers assume. However, the query string encoding
*is* dependent on the character encoding of the page.

But I'm curious: is it really a necessity to use shift_jis for these
providers? They really don't support UTF-8? I would be very surprised if
there's any significant bandwidth savings, since (1) so much of the page
will be ASCII characters for the markup and (2) GZIP compression would
hopefully mitigate other issues.


On Tue, Apr 19, 2011 at 7:52 AM, Katsutoshi Itoh <cutsea110 at gmail.com>wrote:

> Hi
> I think trying to support a mobile phone.
> There are three mobile phone carrier, in Japan.
> To accommodate all carriers instead of UTF-8 CP932(known as Shift_JIS)
> in the code word you need to interact with the Web UI.
> Please tell me what do I like?
> - How to specify charset
> - String embedded in a page how to generate CP932 (UTF-8 instead)
> - How to decode the parameters posted
> thank you.
> _______________________________________________
> web-devel mailing list
> web-devel at haskell.org
> http://www.haskell.org/mailman/listinfo/web-devel
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