[mapserver-dev] Fwd: Re: RFC-93: UTFGrid output

[Even Rouault]

Re-adding mapserver-dev

----------  Message transmis  ----------

Sujet : Re: [mapserver-dev] RFC-93: UTFGrid output
Date : mercredi 28 août 2013, 16:50:47
De : Francois Desjarlais <fdesjarlais1 at gmail.com>
À : Even Rouault <even.rouault at mines-paris.org>

Hi Even,

I misunderstood on the first place and had to re-read your first message.
You are right, the datas in the UTFITEM and UTFDATA aren't escaped. These
item are only the evaluated expression and contains copies of the datas in
the shapefiles. I will add a note in the doc specifying that UTFITEM and
UTFDATA should use JSON valid only datas.

Steve, since I misunderstood in the first place, I doubt that my function
is the one you think about so I will not add it to the mapstring.c file.

Thanks
Francois


2013/8/28 Even Rouault <even.rouault at mines-paris.org>

> Hi François,
>
> > My code is already escaping non-valid characters in the JSON. It should
> > always return a valid one.
>
> Are you sure of that ?
>
> Consider this :
>
> $ cat test.csv
> id,name,WKT
> "a""b\c","d""e\f","POINT(2 49)"
>
> $ ogrinfo test.csv -al
> INFO: Open of `test.csv'
>       using driver `CSV' successful.
>
> Layer name: test
> Geometry: Unknown (any)
> Feature Count: 1
> Extent: (2.000000, 49.000000) - (2.000000, 49.000000)
> Layer SRS WKT:
> (unknown)
> id: String (0.0)
> name: String (0.0)
> WKT: String (0.0)
> OGRFeature(test):1
>   id (String) = a"b\c
>   name (String) = d"e\f
>   WKT (String) = POINT(2 49)
>   POINT (2 49)
>
> $ cat test_utfgrid.map
> MAP
>
> SIZE 10 10
> EXTENT 1 48 3 50
>
> OUTPUTFORMAT
>   NAME "utfgrid"
>   DRIVER UTFGRID
>   MIMETYPE "application/json"
>   EXTENSION "json"
> END
>
> LAYER
>   NAME test
>   CONNECTIONTYPE OGR
>   CONNECTION "test.csv"
>   UTFITEM   "id"
>   UTFDATA   "{\"id\":\"[id]\",\"name\":\"[name]\"}"
>   TYPE POINT
>   STATUS ON
>   CLASS
>     COLOR 0 0 0
>   END
> END
>
> END
>
> $ shp2img -m test_utfgrid.map  -o out.json
>
> $ cat out.json
> {"grid":["  ","  "],"keys":["","a"b\c"],"data":{"a"b\c":
> {"id":"a"b\c","name":"d"e\f"}}}
>
> The strings in keys and data are not JSON escaped.
>
> > Also, I don't have enough time to add the suggested mode before the end
> of
> > the project and school restarting.
>
> Understood. That was just an idea. And others might disagree it is
> appropriate.
>
> Even
>
> --
> Geospatial professional services
> http://even.rouault.free.fr/services.html
>

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