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  1.  Home
  2. WEB400
  3. August 2015

Re: Content-type issue with application/json and application/javascript

Henrik,

I found something you posted a few years ago and tried it and it worked for
me...

Content-type: application/json
Content-encoding: EBCDIC

Is this something deemed incorrect or not a solution? I was actually
surprised it worked. :)

Maybe there is a better solution? It seems we would need to convert all
the output to a specific CCSID before writing it out to StdOut otherwise
(not a huge issue, but may be for some that can't just modify their
toolkits to do this).

Brad
www.bvstools.com

On Tue, Aug 25, 2015 at 3:41 PM, Matt Lavinder <
mlavinder@xxxxxxxxxxxxxxxxxxx> wrote:

Henrik -

Already downloaded it. :)

I noticed you example HTTP instance that you make UTF-8 the default
encoding. I can't do that. If possible, could you send me a very simple
example of how to make this work in PowerEXT Core without changing the HTTP
Server configuration? I see the procedures for turning on UTF-8 mode but
didn't see any examples that use them. Plus, you said the headers cannot
be UTF-8 encoded.

I already have a CGIDEV2 template setup for my JSON, so I really don't want
to change gears and use the JSON library, but I have no issue doing a find
replace and changing WRTSECTION to something else and using the PowerEXT
Core. I don't even mind changing the section and variable tags if I need
to.


On Tue, Aug 25, 2015 at 2:18 PM, Henrik Rützou <hr@xxxxxxxxxxxx> wrote:

mark

if you work a lot within this area you will find that ibm i installations
seldom is able to dictate the content-type

text/json isn't btw an official mime type

On Tue, Aug 25, 2015 at 7:50 PM, Mark Murphy/STAR BASE Consulting Inc. <
mmurphy@xxxxxxxxxxxxxxx> wrote:

Just out of pure ignorance, since application/json causes conversion
issues, and text/json appears to work properly, why do you want to use
application/json? Are there issues that text/json causes on the client
side?

Mark Murphy
STAR BASE Consulting, Inc.
mmurphy@xxxxxxxxxxxxxxx


-----Matt Lavinder <mlavinder@xxxxxxxxxxxxxxxxxxx> wrote: -----
To: "Web Enabling the IBM i (AS/400 and iSeries)" <web400@xxxxxxxxxxxx

From: Matt Lavinder <mlavinder@xxxxxxxxxxxxxxxxxxx>
Date: 08/25/2015 11:42AM
Subject: Re: [WEB400] Content-type issue with application/json and
application/javascript

Henrik -

No worries. I have no intention of changing our CGIConvMode, but I did
want to make sure I understood the implications. The bulk of our CGI
programs produce text/html and they work perfectly fine.

I plan to tweak the programs that produce JSON output and leave
everything
else alone.

On Tue, Aug 25, 2015 at 11:36 AM, Henrik Rützou <hr@xxxxxxxxxxxx>
wrote:

btw if you use binary or recieve application/xxxx content type the
input
also
is recieved as binary without conversion to ebcdic

On Tue, Aug 25, 2015 at 5:34 PM, Henrik Rützou <hr@xxxxxxxxxxxx>
wrote:

matt

you are right

On Tue, Aug 25, 2015 at 5:31 PM, Matt Lavinder <
mlavinder@xxxxxxxxxxxxxxxxxxx> wrote:

Kevin -

It's OK because I know enough to get what he was saying. It makes
it
pretty clear in the HTTP Server documentation that if you add
"charset=utf-8"
(really, charset=anything) that no conversion occurs on the body.

I have never tried CGIConvMode %BINARY%, but wouldn't that mean
that
all
your content has to be UTF-8, including output with
"content-type:text/*"?



On Tue, Aug 25, 2015 at 11:23 AM, Kevin Turner <
kevin.turner@xxxxxxxxxxxxxxxxxxxx> wrote:

Henrick

I know English is not your first language, but I couldn't
understand
that
at all :)

But anyway, my observations are not relevant because we always
use
"CGIConvMode BINARY"

Kevin

-----Original Message-----
From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of
Henrik
Rützou
Sent: 25 August 2015 16:19
To: Web Enabling the IBM i (AS/400 and iSeries) <
web400@xxxxxxxxxxxx>
Subject: Re: [WEB400] Content-type issue with application/json
and
application/javascript

apache doesn't neither converts from an ebcdic body if you send
then
the
body also has to be pre-encoded in utf-8

Content-Type: text/html; charset=utf-8

On Tue, Aug 25, 2015 at 5:14 PM, Kevin Turner <
kevin.turner@xxxxxxxxxxxxxxxxxxxx> wrote:

I am pretty sure we always ensure the data is in UTF-8 when
sending
content that has a content type that is anything but
"text/...."



-----Original Message-----
From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf
Of
Matt
Lavinder
Sent: 25 August 2015 16:12
To: Web Enabling the IBM i (AS/400 and iSeries) <
web400@xxxxxxxxxxxx>
Subject: Re: [WEB400] Content-type issue with application/json
and
application/javascript

Hello Henrick. That's sort of what I suspected. Do I have
to
change
the
CGI program to produce ASCII output, or is there a way to tell
Apache
to do an EBCDIC to ASCII conversion on an
"application/javascript"
content type?

On Tue, Aug 25, 2015 at 10:56 AM, Henrik Rützou <
hr@xxxxxxxxxxxx>
wrote:

apache converts ebcdic to utf-8 if the content type is
text/...
othervise not.


On Tue, Aug 25, 2015 at 4:52 PM, Matt Lavinder <
mlavinder@xxxxxxxxxxxxxxxxxxx> wrote:

We have several CGI programs that generate javascript,
usually
JSON.
For years we have set the content type to text/plain or
text/javascript. I'd like to start using the more
standard
"application/json", but I am
hitting
a major snag. The output is garbage. I get the exact
same
output
when I set the content-type to application/javascript.

Just to verify this was related to CGI output, I used
AddType
to
change
the
content-type of static JavaScript files to
"application/javascript".
Those
files look fine, so this must have something to do with it
being
CGI output.

I don't really know what is up with the output, but I know
it
isn't EBCDIC. It doesn't convert. Garbage in, garbage
out.
Changing the
content
type back to text/javascript sets everything right.

Anyone have any guesses what is going on here? We use
CGIDEV2
under IBM i 7.1. The default CCSID of our CGI jobs is 37.

Just so we are clear on one thing. We had the following
settings
in our HTTP Conf:

DefaultFsCCSID 037
CGIConvMode %%EBCDIC/EBCDIC%%

I commented both settings out and it had no impact on the
output
whatsoever. All of our CGI programs that use content type
of
"text/*"
seemed to work. The ones using "application/javascript"
or
"application/json" for content type still looked like
garbage.
The only guess I have is that mod_cgi sees that the
content-type
starts with "application" and treats the output as binary,
but I
have no idea how I
can
tell mod_cgi to treat "application/javascript" as text, or
if
that
is
even
the issue.

I am hoping someone has an idea. I know Apache pretty
well,
but
this one has me stumped.

--
Matt
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--
Regards,
Henrik Rützou

http://powerEXT.com <http://powerext.com/>
--
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--




*Matt Lavinder Programmer AnalystData Management Inc.Phone:
(336)
573-5045Fax: (336) 573-5001*
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--
Regards,
Henrik Rützou

http://powerEXT.com <http://powerext.com/>
--
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--------------------------------------------------------------------------------


CoralTree Systems Limited
Company Registration Number 5021022.
Registered Office:
12-14 Carlton Place
Southampton
Hampshire
SO15 2EA
VAT Registration Number 834 1020 74.
--
This is the Web Enabling the IBM i (AS/400 and iSeries) (WEB400)
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--




*Matt Lavinder Programmer AnalystData Management Inc.Phone: (336)
573-5045Fax: (336) 573-5001*
--
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--
Regards,
Henrik Rützou

http://powerEXT.com <http://powerext.com/>





--
Regards,
Henrik Rützou

http://powerEXT.com <http://powerext.com/>
--
This is the Web Enabling the IBM i (AS/400 and iSeries) (WEB400)
mailing
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--




*Matt Lavinder Programmer AnalystData Management Inc.Phone: (336)
573-5045Fax: (336) 573-5001*
--
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mailing
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--
Regards,
Henrik Rützou

http://powerEXT.com <http://powerext.com/>
--
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--




*Matt Lavinder Programmer AnalystData Management Inc.Phone: (336)
573-5045Fax: (336) 573-5001*
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