Re: [mapserver-users] Setting up a JSONP service

Lars Fricke Mon, 12 Jan 2015 23:13:08 -0800

Hi  Andreas,

I was on business trip yesterday so I only reply today. I will test thisand let you know. I assume I'll have to compile Mapserver including yourchange. Since so far I used precompiled I guess I'll take some timesetting it up to compile. Anyhow I'll keep you posted and thank you verymuch for your support.


Best

Lars

Am 09.01.2015 um 15:30 schrieb Eichner, Andreas - SID:

Hi,

I've attached a quick'n dirty solution (against master). When applied to
mapogroutput.c you can set a JSONP formatoption to the callback name:

OUTPUTFORMAT
     NAME 'geojson'
     DRIVER 'OGR/GEOJSON'
     MIMETYPE 'application/json; subtype=geojson; charset=utf-8'
     FORMATOPTION 'STORAGE=stream'
     FORMATOPTION 'FORM=simple'
     FORMATOPTION 'LCO:COORDINATE_PRECISION=5'
     FORMATOPTION 'JSONP=%callback%'
END

This needs of course a WEB.VALIDATION:
WEB
   ...
   VALIDATION
     callback '.*'
   END
END

Would be great if you can test if this works (looks good to me). The Devs might 
have a look if this could be integrated into master until OGR has an 
appropriate layer creation option (solution described by Even).

Greetings

-----Ursprüngliche Nachricht-----
Von: [email protected] [mailto:mapserver-users-
[email protected]] Im Auftrag von Lars Fricke
Gesendet: Freitag, 9. Januar 2015 11:24
An: [email protected]
Betreff: Re: [mapserver-users] Setting up a JSONP service

Hello,

first of all: Thank you for your support!
Sorry for the late reply but I unfortunately was ill.

@ Steve:
I read about templating but also read that it is slower?
I do not have a lot of experience in writing templates. Would you mind
sharing a JSONP template?

@ Even: Thank you for your thoughts. Who would implement that change
though? I'm afraid I can't.

@ Jeff: I followed those links but I only found threads referring to
GeoServer or that were not related to my question. The GDAL page I did
study and that's how I managed to set up the GeoJSON service but thats
not the same unfortunately as it conflicts with the same origin policy.

Best

Lars

Am 30.12.2014 um 16:24 schrieb Lime, Steve D (MNIT):

You can also use MapServer templates to accomplish this. It's a little

more work since you have to write the template but it's quite flexible
then. Usually I write the template to produce JSON and then use a simple
wrapper template to produce JSONP. For example, jsonp.js looks like
(callback is passed in):

// MapServer Template
[callback](
    [include src="templates/json.js"]
)

Output formats look like:

    OUTPUTFORMAT
      NAME 'JSON'
      DRIVER 'TEMPLATE'
      MIMETYPE 'application/json;'
      FORMATOPTION 'FILE=templates/json.js'
      FORMATOPTION 'ATTACHMENT=service.json'
    END

    OUTPUTFORMAT
      NAME 'JSONP'
      DRIVER 'TEMPLATE'
      MIMETYPE 'application/json;'
      FORMATOPTION 'FILE=templates/jsonp.js'
      FORMATOPTION 'ATTACHMENT=service.json'
    END

Steve

-----Original Message-----
From:[email protected]  [mailto:mapserver-users-

[email protected]] On Behalf Of Lars Fricke

Sent: Monday, December 29, 2014 5:34 AM
To:[email protected]
Subject: [mapserver-users] Setting up a JSONP service

Dear List,

I have a WFS service running under MapServer that I would like to

operate as JSONP service. I managed to set GEOJSON as output format but I
get "Cross-Origin-Request Blocked" if I try to call it with a Javascript
client (using Leaflet L.layerJSON.

The question is: Is it possible to set up a JSONP service from Mapserver

and if yes, how? My current mapfile looks like this (relevant parts):

"
# in WEB - METADATA
"wfs_getfeature_formatlist" "geojson,csv,ogrgml"

OUTPUTFORMAT
      NAME "geojson"
      DRIVER "OGR/GEOJSON"
      MIMETYPE "application/json; subtype=geojson; charset=utf-8"
      FORMATOPTION "STORAGE=stream"
      FORMATOPTION "FORM=SIMPLE"
      FORMATOPTION "LCO:COORDINATE_PRECISION=5"
     END
"
If this would already be a correct JSONP service, I have to look on the

Leaflet side for the error...

Thanks for your help.

Cheers

Lars
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