GetFeatureInfoJSONFilter.py

# -*- coding: utf-8 -*-

"""
***************************************************************************
    QGIS Server Plugin Filters: this test filter adds a CSS to HTML
    get feature info response.
    ---------------------
    Date                 : April 2015
    Copyright            : (C) 2015 by Alessandro Pasotti
    Email                : apasotti at gmail dot com
***************************************************************************
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU General Public License as published by  *
*   the Free Software Foundation; either version 2 of the License, or     *
*   (at your option) any later version.                                   *
*                                                                         *
***************************************************************************
"""

import os

from qgis.server import *
from qgis.core import *
from PyQt4.QtCore import *
from PyQt4.QtGui import *

import xmltodict, json


class GetFeatureInfoJSONFilter(QgsServerFilter):

    def __init__(self, serverIface):
        super(GetFeatureInfoJSONFilter, self).__init__(serverIface)

    def requestReady(self):
        """Nothing to do here, but it would be the ideal point
        to alter request **before** it gets processed, for example
        you could set INFO_FORMAT to text/xml to get XML instead of
        HTML in responseComplete"""
        request = self.serverInterface().requestHandler()
        params = request.parameterMap( )
        # request.setParameter('INFO_FORMAT', 'application/json')



        pass

    def responseComplete(self):
        request = self.serverInterface().requestHandler()
        params = request.parameterMap( )
        QgsMessageLog.logMessage("GetFeatureInfoJSON.responseComplete")
        QgsMessageLog.logMessage( request.tostring())
        QgsMessageLog.logMessage(request)

        if (params.get('SERVICE').upper() == 'WMS' \
                and params.get('REQUEST', '').upper() == 'GETCAPABILITIES' \
                and not request.exceptionRaised() ):
            body = request.body()
            # QgsMessageLog.logMessage("GetFeatureInfoJSON.responseComplete.enterCase")
            body.replace('<GetFeatureInfo>', "<GetFeatureInfo>\n    <Format>application/json</Format>")
            request.clearBody()
            request.appendBody(body)

        elif (params.get('SERVICE').upper() == 'WMS' \
                and params.get('REQUEST', '').upper() == 'GETFEATUREINFO' \
                and params.get('INFO_FORMAT', '').upper() == 'APPLICATION/JSON' \
                and not request.exceptionRaised() ):

            QgsMessageLog.logMessage("GetFeatureInfoJSON.responseComplete.enterCaseGETFEATUREINFO")
            body = request.body()
            o = xmltodict.parse(str(body))
            out_json = json.dumps(o) # '{"e": {"a": ["text", "text"]}}'
            QgsMessageLog.logMessage(str(out_json))

Hi,

I've just install your plugin. But I've got the following error

Feature info format 'application/json' is not supported. Possibilities are 'text/plain', 'text/html' or 'text/xml'.

How can I fix this.

Regards