Source Code for Module madrona.loadshp.views

 1  from django.http import HttpResponse 
 2  from django.shortcuts import render_to_response 
 3  from django.conf import settings 
 4  from django.utils import simplejson 
 5  from django.template import Context, RequestContext 
 6  from django.template.loader import get_template 
 7  from madrona.common import default_mimetypes as mimetypes 
 8  from madrona.common.utils import kml_errors 
 9  from forms import UploadForm 
10   
11   
12 -def load_single_shp(request): 
13      """ 
14      GET returns a form to upload a zipped shp 
15      POST takes the zip, validates that it is a single-feature poly shp and returns KML  
16      """ 
17      user = request.user 
18      if user.is_anonymous() or not user.is_authenticated(): 
19          return HttpResponse('You must be logged in', status=401) 
20   
21      form = UploadForm() 
22      if request.method == 'POST': 
23          form = UploadForm(request.POST, request.FILES) 
24   
25          # Override the defulat form behavior and  
26          # only allow single-feature polygon shps 
27          form.multi_feature = False 
28          form.supported_geomtypes = ['Polygon'] 
29   
30          if form.is_valid(): 
31              layer = form.handle(request.FILES['file_obj'],user) 
32              g = layer[0].geom 
33              if g.srs: 
34                  g.transform_to(4326) 
35              geoms = [g] 
36              t = get_template('loadshp/loadshp.kml') 
37              kml = t.render(Context({'username': user.username, 'geoms': geoms})) 
38              json = simplejson.dumps({'input_kml': kml, 'status':'success'}) 
39              # Jquery Form plugin requires that we wrap this in a textarea  
40              # otherwise it mangles the kml   
41              return HttpResponse('<textarea>' + json + '</textarea>',mimetype="text/html") 
42          else: 
43              json = simplejson.dumps({'error_html': form.errors['file_obj'][0], 'status':'errors'}) 
44              return HttpResponse('<textarea>' + json + '</textarea>',mimetype="text/html") 
45   
46      elif request.method == 'GET': 
47          return render_to_response('loadshp/upload.html', RequestContext(request,{'form': form,'action':request.path})) 
48   
49      else: 
50          raise Exception("This URL does not support %s requests" % request.method) 
51