def get_mirrored_kml(url):
logger.info("Downloading %s.", url)
with urlopen(urllib2.Request(url)) as response:
headers = response.info()
last_modified = headers.getdate('Last-Modified')
# check the content type
content_type = headers['Content-Type'].strip()
if content_type not in KML_MIRROR_TYPES:
raise Exception('Unsupported Content-Type')
# prevent humongous downloads
content_length = int(headers['Content-Length'].strip())
if content_length >= KML_MIRROR_MAX_CONTENT_LENGTH:
raise Exception('KML_MIRROR_MAX_CONTENT_LENGTH exceeded')
# perform the download
content = response.read(KML_MIRROR_MAX_CONTENT_LENGTH)
# recompress KML to KMZ
if content_type == MIME_KML:
logger.info("Compressing %s to KMZ.", url)
content = compress_kml(content)
content_type = MIME_KMZ
return content, content_type
def handle(self, *args, **options):
print "Getting all trees..."
trees = models.Tree.objects.filter(present=True)
print "Writing %i trees to CSV" % trees.count()
queryset_to_excel_file(trees, "All_Trees",force_csv=True)
print "Getting kml strings..."
trees = trees.kml()
output = file('All_Trees.kmz','wb')
print "Writing %i trees to KML" % trees.count()
output.write(compress_kml(loader.render_to_string("treemap/kml_output.kml", {'trees': trees,'root_url':settings.ROOT_URL})))
output.close()
def handle(self, *args, **options):
print "Getting all trees..."
trees = models.Tree.objects.filter(present=True)
print "Writing %i trees to CSV" % trees.count()
queryset_to_excel_file(trees, "All_Trees", force_csv=True)
print "Getting kml strings..."
trees = trees.kml()
output = file('All_Trees.kmz', 'wb')
print "Writing %i trees to KML" % trees.count()
output.write(
compress_kml(
loader.render_to_string("treemap/kml_output.kml", {
'trees': trees,
'root_url': settings.ROOT_URL
})))
output.close()
def get_mirrored_kml(url):
'''
Mirror external data located at given url, so it can be served with our
own webserver. The downloaded data is cached for 24 hours.
Returns a tuple (content, content_type).
'''
logger.info("Downloading %s.", url)
with urlopen(urllib2.Request(url)) as response:
headers = response.info()
last_modified = headers.getdate('Last-Modified')
# check the content type
content_type = headers['Content-Type'].strip()
# sometimes servers like to add ';mode=networklink' to the content-type
if ';' in content_type:
content_type = content_type.split(';')[0]
# ensure only known types are proxy'd
if content_type not in KML_MIRROR_TYPES:
raise Exception('Unsupported Content-Type')
# prevent humongous downloads
# some servers (Geoserver...) won't even send this header
if 'Content-Length' in headers:
content_length = int(headers['Content-Length'].strip())
if content_length >= KML_MIRROR_MAX_CONTENT_LENGTH:
raise Exception('KML_MIRROR_MAX_CONTENT_LENGTH exceeded')
# perform the download
content = response.read(KML_MIRROR_MAX_CONTENT_LENGTH)
# when len(content) == KML_MIRROR_MAX_CONTENT_LENGTH,
# this probably means there's more data available
if len(content) >= KML_MIRROR_MAX_CONTENT_LENGTH:
raise Exception('KML_MIRROR_MAX_CONTENT_LENGTH exceeded')
# recompress KML to KMZ
if content_type == MIME_KML:
logger.info("Compressing %s to KMZ.", url)
content = compress_kml(content)
content_type = MIME_KMZ
return content, content_type
def render(self, *args, **kwargs):
kmldata = super(KMZRenderer, self).render(*args, **kwargs)
return compress_kml(kmldata)
def render(self, *args, **kwargs):
kmldata = super(KMZRenderer, self).render(*args, **kwargs)
return compress_kml(kmldata)
