QGIS Server binding news

With QGIS 2.12 released, the new Python bindings for QGIS server are finally available!

With QGIS 2.12 the new Python bindings for QGIS server are now available and the server can be invoked directly from a python scripts with just a few lines of code:

 

from qgis.server import QgsServer
my_query_string = "map=/projects/my_project.qgs&SERVICE=WMS&request=GetCapabilities"
headers, body =  QgsServer().handleRequest(my_query_string)

 

Embedding QGIS in a Python web application

Embedding QGIS Server in a web application is now not only possible but really very easy, for example, a Django view:

# QGIS server view

from django.http import HttpResponse
from django.views.generic import View
from qgis.server import *


class OGC(View):
    """Pass a GET request to QGIS Server and return the response"""

    def __init__(self):
        self.server = QgsServer()        

    def get(self, request, *args, **kwargs):
        """Pass a GET request to QGIS Server and return the response"""
        headers, body = self.server.handleRequest(request.GET.urlencode())
        response = HttpResponse(body)
        # Parse headers
        for header in headers.split('\n'):
            if header:
                k, v = header.split(': ', 1)
                response[k] = v
        return response

 

Using server plugins

 

Of course Python server plugins can be plugged in easily, see the example below:

 


# QGIS server view

from django.http import HttpResponse
from django.views.generic import View
from qgis.server import *
from qgis.core import *



class OGC(View):
    """Pass a GET request to QGIS Server and return the response"""

    def __init__(self):
        self.server = QgsServer()
        # Call init to create serverInterface
        self.server.init()
        serverIface = self.server.serverInterface()

        class Filter1(QgsServerFilter):
            def responseComplete(self):
                QgsMessageLog.logMessage("Filter1.responseComplete", "Server", QgsMessageLog.INFO )
                request = self.serverInterface().requestHandler()
                if request.parameter('REQUEST') == 'HELLO':
                    request.clearHeaders()
                    request.setHeader('Content-type', 'text/plain')
                    request.clearBody()
                    request.appendBody('Hello from SimpleServer!')

            def requestReady(self):
                QgsMessageLog.logMessage("Filter1.requestReady")

        self.filter = Filter1(serverIface)
        serverIface.registerFilter(self.filter)


    def get(self, request, *args, **kwargs):
        """Pass a GET request to QGIS Server and return the response"""
        headers, body = self.server.handleRequest(request.GET.urlencode())
        response = HttpResponse(body)
        # Parse headers
        for header in headers.split('\n'):
            if header:
                k, v = header.split(': ', 1)
                response[k] = v
        return response


 

Enjoy QGIS Server with Python!

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