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views.py
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views.py
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# -*- coding:utf-8 -*-
import os
import hashlib
from django.conf import settings
from django.contrib import messages
from django.contrib.auth import logout as do_logout
from django.contrib.auth import get_user_model
from django.core.signing import Signer, BadSignature
from django.core.urlresolvers import reverse_lazy, reverse
from django.http import (HttpResponse, HttpResponseForbidden,
HttpResponseRedirect, CompatibleStreamingHttpResponse,
HttpResponsePermanentRedirect)
from django.shortcuts import get_object_or_404
from django.template import RequestContext
from django.template.loader import render_to_string
from django.utils import simplejson
from django.utils.translation import ugettext as _
from django.views.generic import View
from django.views.generic import DetailView
from django.views.generic.detail import BaseDetailView
from django.views.generic.list import ListView
from django.views.generic.base import TemplateView, RedirectView
from django.views.generic.edit import CreateView, UpdateView, DeleteView
from django.utils.http import http_date
from django.middleware.gzip import re_accepts_gzip
from .models import Map, DataLayer, TileLayer, Pictogram, Licence
from .utils import get_uri_template, gzip_file
from .forms import (DataLayerForm, UpdateMapPermissionsForm, MapSettingsForm,
AnonymousMapPermissionsForm, DEFAULT_LATITUDE,
DEFAULT_LONGITUDE, FlatErrorList)
User = get_user_model()
ANONYMOUS_COOKIE_MAX_AGE = 60 * 60 * 24 * 30 # One month
# ############## #
# Utils #
# ############## #
def _urls_for_js(urls=None):
"""
Return templated URLs prepared for javascript.
"""
if urls is None:
# prevent circular import
from .urls import urlpatterns
urls = [url.name for url in urlpatterns if getattr(url, 'name', None)]
urls = dict(zip(urls, [get_uri_template(url) for url in urls]))
urls.update(getattr(settings, 'LEAFLET_STORAGE_EXTRA_URLS', {}))
return urls
def render_to_json(templates, response_kwargs, context, request):
"""
Generate a JSON HttpResponse with rendered template HTML.
"""
html = render_to_string(
templates,
response_kwargs,
RequestContext(request, context)
)
_json = simplejson.dumps({
"html": html
})
return HttpResponse(_json)
def simple_json_response(**kwargs):
return HttpResponse(simplejson.dumps(kwargs))
# ############## #
# Map #
# ############## #
class FormLessEditMixin(object):
http_method_names = [u'post', ]
def form_invalid(self, form):
return simple_json_response(errors=form.errors, error=unicode(form.errors))
def get_form(self, form_class):
kwargs = self.get_form_kwargs()
kwargs['error_class'] = FlatErrorList
return form_class(**kwargs)
class MapDetailMixin(object):
model = Map
def get_context_data(self, **kwargs):
context = super(MapDetailMixin, self).get_context_data(**kwargs)
properties = {}
properties['datalayers'] = self.get_datalayers()
properties['urls'] = _urls_for_js()
properties['tilelayers'] = self.get_tilelayers()
if self.get_short_url():
properties['shortUrl'] = self.get_short_url()
if settings.USE_I18N:
locale = settings.LANGUAGE_CODE
# Check attr in case the middleware is not active
if hasattr(self.request, "LANGUAGE_CODE"):
locale = self.request.LANGUAGE_CODE
properties['locale'] = locale
context['locale'] = locale
properties['allowEdit'] = self.is_edit_allowed()
properties["default_iconUrl"] = "%sstorage/src/img/marker.png" % settings.STATIC_URL
properties['storage_id'] = self.get_storage_id()
properties['licences'] = dict((l.name, l.json) for l in Licence.objects.all())
# if properties['locateOnLoad']:
# properties['locate'] = {
# 'setView': True,
# 'enableHighAccuracy': True,
# 'timeout': 3000
# }
map_settings = self.get_geojson()
if not "properties" in map_settings:
map_settings['properties'] = {}
map_settings['properties'].update(properties)
context['map_settings'] = simplejson.dumps(map_settings, indent=settings.DEBUG)
return context
def get_tilelayers(self):
return TileLayer.get_list(selected=TileLayer.get_default())
def get_datalayers(self):
return []
def is_edit_allowed(self):
return True
def get_storage_id(self):
return None
def get_geojson(self):
return {
"geometry": {
"coordinates": [DEFAULT_LONGITUDE, DEFAULT_LATITUDE],
"type": "Point"
},
"properties": {
"zoom": getattr(settings, 'LEAFLET_ZOOM', 6)
}
}
def get_short_url(self):
return None
class MapView(MapDetailMixin, DetailView):
def get(self, request, *args, **kwargs):
self.object = self.get_object()
canonical = self.get_canonical_url()
if not request.path == canonical:
canonical = "?".join([canonical, request.META['QUERY_STRING']])
return HttpResponsePermanentRedirect(canonical)
if not self.object.can_view(request):
return HttpResponseForbidden('Forbidden')
return super(MapView, self).get(request, *args, **kwargs)
def get_canonical_url(self):
return self.object.get_absolute_url()
def get_datalayers(self):
datalayers = DataLayer.objects.filter(map=self.object) # TODO manage state
return [l.metadata for l in datalayers]
def get_tilelayers(self):
return TileLayer.get_list(selected=self.object.get_tilelayer())
def is_edit_allowed(self):
if self.object.edit_status == self.object.ANONYMOUS:
allow_edit = True
elif self.request.user.is_authenticated():
allow_edit = self.object.can_edit(self.request.user, self.request)
else:
allow_edit = False
return allow_edit
def get_storage_id(self):
return self.object.pk
def get_short_url(self):
shortUrl = None
if hasattr(settings, 'SHORT_SITE_URL'):
short_url_name = getattr(settings, 'MAP_SHORT_URL_NAME', 'map_short_url')
short_path = reverse_lazy(short_url_name, kwargs={'pk': self.object.pk})
shortUrl = "%s%s" % (settings.SHORT_SITE_URL, short_path)
return shortUrl
def get_geojson(self):
settings = self.object.settings
if not "properties" in settings:
settings['properties'] = {}
if self.object.owner:
settings['properties']['author'] = {
'name': self.object.owner.get_username(),
'link': reverse('user_maps', args=(self.object.owner.get_username(), ))
}
return settings
class MapViewGeoJSON(MapView):
def get_canonical_url(self):
return reverse('map_geojson', args=(self.object.pk, ))
def render_to_response(self, context, *args, **kwargs):
return HttpResponse(context['map_settings'])
class MapNew(MapDetailMixin, TemplateView):
template_name = "leaflet_storage/map_detail.html"
class MapCreate(FormLessEditMixin, CreateView):
model = Map
form_class = MapSettingsForm
def form_valid(self, form):
if self.request.user.is_authenticated():
form.instance.owner = self.request.user
self.object = form.save()
if not self.request.user.is_authenticated():
anonymous_url = "%s%s" % (
settings.SITE_URL,
self.object.get_anonymous_edit_url()
)
msg = _(
"Your map has been created! If you want to edit this map from "
"another computer, please use this link: %(anonymous_url)s"
% {"anonymous_url": anonymous_url}
)
else:
msg = _("Congratulations, your map has been created!")
response = simple_json_response(
id=self.object.pk,
url=self.object.get_absolute_url(),
info=msg
)
if not self.request.user.is_authenticated():
key, value = self.object.signed_cookie_elements
response.set_signed_cookie(
key=key,
value=value,
max_age=ANONYMOUS_COOKIE_MAX_AGE
)
return response
class MapUpdate(FormLessEditMixin, UpdateView):
model = Map
form_class = MapSettingsForm
pk_url_kwarg = 'map_id'
def form_valid(self, form):
self.object.settings = form.cleaned_data["settings"]
self.object.save()
return simple_json_response(
id=self.object.pk,
url=self.object.get_absolute_url(),
info=_("Map has been updated!")
)
class UpdateMapPermissions(UpdateView):
template_name = "leaflet_storage/map_update_permissions.html"
model = Map
pk_url_kwarg = 'map_id'
def get_form_class(self):
if self.object.owner:
return UpdateMapPermissionsForm
else:
return AnonymousMapPermissionsForm
def get_form(self, form_class):
form = super(UpdateMapPermissions, self).get_form(form_class)
user = self.request.user
if self.object.owner and not user == self.object.owner:
del form.fields['edit_status']
del form.fields['share_status']
del form.fields['owner']
return form
def form_valid(self, form):
self.object = form.save()
return simple_json_response(info=_("Map editors updated with success!"))
def render_to_response(self, context, **response_kwargs):
return render_to_json(self.get_template_names(), response_kwargs, context, self.request)
class MapDelete(DeleteView):
model = Map
pk_url_kwarg = "map_id"
def delete(self, *args, **kwargs):
self.object = self.get_object()
if self.object.owner and self.request.user != self.object.owner:
return HttpResponseForbidden(_('Only its owner can delete the map.'))
if not self.object.owner and not self.object.is_anonymous_owner(self.request):
return HttpResponseForbidden('Forbidden.')
self.object.delete()
return simple_json_response(redirect="/")
class MapClone(View):
def post(self, *args, **kwargs):
if not getattr(settings, "LEAFLET_STORAGE_ALLOW_ANONYMOUS", False) \
and not self.request.user.is_authenticated():
return HttpResponseForbidden('Forbidden')
owner = self.request.user if self.request.user.is_authenticated() else None
self.object = kwargs['map_inst'].clone(owner=owner)
response = simple_json_response(redirect=self.object.get_absolute_url())
if not self.request.user.is_authenticated():
key, value = self.object.signed_cookie_elements
response.set_signed_cookie(
key=key,
value=value,
max_age=ANONYMOUS_COOKIE_MAX_AGE
)
anonymous_url = "%s%s" % (
settings.SITE_URL,
self.object.get_anonymous_edit_url()
)
msg = _(
"Your map has been cloned! If you want to edit this map from "
"another computer, please use this link: %(anonymous_url)s"
% {"anonymous_url": anonymous_url}
)
else:
msg = _("Congratulations, your map has been cloned!")
messages.info(self.request, msg)
return response
class MapShortUrl(RedirectView):
query_string = True
def get_redirect_url(self, **kwargs):
map_inst = get_object_or_404(Map, pk=kwargs['pk'])
url = map_inst.get_absolute_url()
if self.query_string:
args = self.request.META.get('QUERY_STRING', '')
if args:
url = "%s?%s" % (url, args)
return url
class MapOldUrl(RedirectView):
"""
Handle map URLs from before anonymous allowing.
"""
query_string = True
def get_redirect_url(self, **kwargs):
owner = get_object_or_404(User, username=self.kwargs['username'])
map_inst = get_object_or_404(Map, slug=self.kwargs['slug'], owner=owner)
url = map_inst.get_absolute_url()
if self.query_string:
args = self.request.META.get('QUERY_STRING', '')
if args:
url = "%s?%s" % (url, args)
return url
class MapAnonymousEditUrl(RedirectView):
def get(self, request, *args, **kwargs):
signer = Signer()
try:
pk = signer.unsign(self.kwargs['signature'])
except BadSignature:
return HttpResponseForbidden('Bad Signature')
else:
map_inst = get_object_or_404(Map, pk=pk)
url = map_inst.get_absolute_url()
response = HttpResponseRedirect(url)
if not map_inst.owner:
key, value = map_inst.signed_cookie_elements
response.set_signed_cookie(
key=key,
value=value,
max_age=ANONYMOUS_COOKIE_MAX_AGE
)
return response
# ############## #
# DataLayer #
# ############## #
class GZipMixin(object):
EXT = '.gz'
def path(self):
"""
Serve gzip file if client accept it.
Generate or update the gzip file if needed.
"""
path = self.object.geojson.path
statobj = os.stat(path)
ae = self.request.META.get('HTTP_ACCEPT_ENCODING', '')
if re_accepts_gzip.search(ae) and getattr(settings, 'LEAFLET_STORAGE_GZIP', True):
gzip_path = "{path}{ext}".format(path=path, ext=self.EXT)
up_to_date = True
if not os.path.exists(gzip_path):
up_to_date = False
else:
gzip_statobj = os.stat(gzip_path)
if statobj.st_mtime > gzip_statobj.st_mtime:
up_to_date = False
if not up_to_date:
gzip_file(path, gzip_path)
path = gzip_path
return path
def etag(self):
path = self.path()
with open(path) as f:
return hashlib.md5(f.read()).hexdigest()
class DataLayerView(GZipMixin, BaseDetailView):
model = DataLayer
def render_to_response(self, context, **response_kwargs):
response = None
path = self.path()
if getattr(settings, 'LEAFLET_STORAGE_XSENDFILE_HEADER', None):
response = HttpResponse()
response[settings.LEAFLET_STORAGE_XSENDFILE_HEADER] = path
else:
# TODO IMS
statobj = os.stat(path)
response = CompatibleStreamingHttpResponse(
open(path, 'rb'),
content_type='application/json'
)
response["Last-Modified"] = http_date(statobj.st_mtime)
response['ETag'] = '%s' % hashlib.md5(response.content).hexdigest()
response['Content-Length'] = str(len(response.content))
if path.endswith(self.EXT):
response['Content-Encoding'] = 'gzip'
return response
class DataLayerCreate(FormLessEditMixin, GZipMixin, CreateView):
model = DataLayer
form_class = DataLayerForm
def form_valid(self, form):
form.instance.map = self.kwargs['map_inst']
self.object = form.save()
response = simple_json_response(**self.object.metadata)
response['ETag'] = self.etag()
return response
class DataLayerUpdate(FormLessEditMixin, GZipMixin, UpdateView):
model = DataLayer
form_class = DataLayerForm
def form_valid(self, form):
self.object = form.save()
response = simple_json_response(**self.object.metadata)
response['ETag'] = self.etag()
return response
def if_match(self):
"""Optimistic concurrency control."""
match = True
if_match = self.request.META.get('HTTP_IF_MATCH')
if if_match:
etag = self.etag()
if etag != if_match:
match = False
return match
def post(self, request, *args, **kwargs):
self.object = self.get_object()
if self.object.map != self.kwargs['map_inst']:
return HttpResponseForbidden('Route to nowhere')
if not self.if_match():
return HttpResponse(status=412)
return super(DataLayerUpdate, self).post(request, *args, **kwargs)
class DataLayerDelete(DeleteView):
model = DataLayer
def delete(self, *args, **kwargs):
self.object = self.get_object()
if self.object.map != self.kwargs['map_inst']:
return HttpResponseForbidden('Route to nowhere')
self.object.delete()
return simple_json_response(info=_("Layer successfully deleted."))
# ############## #
# Picto #
# ############## #
class PictogramJSONList(ListView):
model = Pictogram
def render_to_response(self, context, **response_kwargs):
content = [p.json for p in Pictogram.objects.all()]
return simple_json_response(pictogram_list=content)
# ############## #
# Generic #
# ############## #
def logout(request):
do_logout(request)
return simple_json_response(redirect="/")
class LoginPopupEnd(TemplateView):
"""
End of a loggin process in popup.
Basically close the popup.
"""
template_name = "leaflet_storage/login_popup_end.html"