def wms(self):
"""This is a WMS endpoint.
It uses mapserver mapscript to process a WMS request.
This endpoint requires an additional WMS parameter
DATA_URL. The DATA_URL, should point to a downloadable file
which can be used as raster data input for mapserver.
"""
LOG.debug('Processing ows request')
data_url = None
try:
data_url = self.request.GET.getone('DATA_URL')
except:
LOG.warn('No data_url provided')
data_url = None
# FIXME: should return an error here)
# get location of local data file
loc = fetch_file(self.request, data_url)
# get map
map = self._get_map()
# setup layer
# TODO: improve selection of Layer generator
# TODO: use python-magic for a more reliable mime type detection
mimetype, encoding = mimetypes.guess_type(loc)
if mimetype == 'image/tiff':
layer = TiffLayer(self.request, loc)
elif mimetype == 'text/csv':
layer = CSVLayer(self.request, loc)
elif mimetype == 'application/zip':
datadir, filename = os.path.split(loc)
# fname, fext = os.path.splitext(filename)
# Check if shape/gdb file exists.
# if os.path.isfile(os.path.join(datadir, fname + ".shp")):
# dbFilename = os.path.join(datadir, fname + ".shp")
# elif os.path.isdir(os.path.join(datadir, fname)) and fname.endswith(".gdb"):
# dbFilename = os.path.join(datadir, fname)
# else:
# msg = "Invalid zip file '{}' -- is not in shape/gdb format.".format(filename)
# raise HTTPNotImplemented(msg)
# FIXME: filename shall be gdb/shape filename
layer = ShapeLayer(self.request, filename)
else:
msg = "Unknown file type '{}'.".format(mimetype)
# HTTPBadRequest(msg)
raise HTTPNotImplemented(msg)
# add layer into map
idx = layer.add_layer_obj(map)
# set map projection and extent from layer data
lx = map.getLayer(idx).getExtent()
map.extent = mapscript.rectObj(lx.minx, lx.miny, lx.maxx, lx.maxy)
map.setProjection = "init={}".format(layer._data['crs'])
# prepare an ows request object
# do some map processing here
ows_req = mapscript.OWSRequest()
# our layer.add_layer_obj applies SLD and SLD_BODY
# copy request params into ows request except not these two
for k, v in ((k, v)for (k, v) in self.request.params.items() if k.lower() not in ('sld', 'sld_body', 'data_url')):
ows_req.setParameter(k, v)
# req.setParameter('SERVICE', 'WMS')
# req.setParameter('VERSION', '1.3.0')
# req.setParameter('REQUEST', 'GetCapablities')
# here is probably some room for optimisation
# e.g. let mapscript write directly to output?
# write tile to file system and serve tile via some other means?
# cache tile or at least mapobj?
wms_req = self.request.params['REQUEST']
wms_ver = self.request.params.get('VERSION', '1.3.0')
# now do something based on REQUEST:
if wms_req == u'GetMap':
res = map.loadOWSParameters(ows_req, wms_ver) # if != 0 then error
img = map.draw()
return Response(img.getBytes(), content_type=img.format.mimetype)
elif wms_req == u'GetCapabilities':
mapscript.msIO_installStdoutToBuffer()
res = map.OWSDispatch(ows_req) # if != 0 then error
content_type = mapscript.msIO_stripStdoutBufferContentType()
content = mapscript.msIO_getStdoutBufferBytes()
return Response(content, content_type=content_type)
elif wms_req == u'GetFeatureInfo':
res = map.loadOWSParameters(ows_req, wms_ver) # if != 0 then error
mapscript.msIO_installStdoutToBuffer()
res = map.OWSDispatch(ows_req) # if != 0 then error
content_type = mapscript.msIO_stripStdoutBufferContentType()
content = mapscript.msIO_getStdoutBufferBytes()
return Response(content, content_type=content_type)
# We shouldn't end up here.....
# let's raise an Error
# FIXME: I am sure there are better pyramid ways to return errors
raise Exception('request was not handled correctly')
def wms(self):
"""This is a WMS endpoint.
It uses mapserver mapscript to process a WMS request.
This endpoint requires an additional WMS parameter
DATA_URL. The DATA_URL, should point to a downloadable file
which can be used as raster data input for mapserver.
"""
LOG.debug('Processing ows request')
data_url = None
try:
data_url = self.request.GET.getone('DATA_URL')
except:
LOG.warn('No data_url provided')
data_url = None
# FIXME: should return an error here)
# get location of local data file
loc = fetch_file(self.request, data_url)
# get map
map = self._get_map()
# setup layer
# TODO: improve selection of Layer generator
# TODO: use python-magic for a more reliable mime type detection
mimetype, encoding = mimetypes.guess_type(loc)
if mimetype == 'image/tiff':
layer = TiffLayer(self.request, loc)
elif mimetype == 'text/csv':
layer = CSVLayer(self.request, loc)
elif mimetype == 'application/zip':
datadir, filename = os.path.split(loc)
# fname, fext = os.path.splitext(filename)
# Check if shape/gdb file exists.
# if os.path.isfile(os.path.join(datadir, fname + ".shp")):
# dbFilename = os.path.join(datadir, fname + ".shp")
# elif os.path.isdir(os.path.join(datadir, fname)) and fname.endswith(".gdb"):
# dbFilename = os.path.join(datadir, fname)
# else:
# msg = "Invalid zip file '{}' -- is not in shape/gdb format.".format(filename)
# raise HTTPNotImplemented(msg)
# FIXME: filename shall be gdb/shape filename
layer = ShapeLayer(self.request, filename)
else:
msg = "Unknown file type '{}'.".format(mimetype)
# HTTPBadRequest(msg)
raise HTTPNotImplemented(msg)
# add layer into map
idx = layer.add_layer_obj(map)
# set map projection and extent from layer data
lx = map.getLayer(idx).getExtent()
map.extent = mapscript.rectObj(lx.minx, lx.miny, lx.maxx, lx.maxy)
map.setProjection = "init={}".format(layer._data['crs'])
# prepare an ows request object
# do some map processing here
ows_req = mapscript.OWSRequest()
# our layer.add_layer_obj applies SLD and SLD_BODY
# copy request params into ows request except not these two
for k, v in ((k, v) for (k, v) in self.request.params.items()
if k.lower() not in ('sld', 'sld_body', 'data_url')):
ows_req.setParameter(k, v)
# req.setParameter('SERVICE', 'WMS')
# req.setParameter('VERSION', '1.3.0')
# req.setParameter('REQUEST', 'GetCapablities')
# here is probably some room for optimisation
# e.g. let mapscript write directly to output?
# write tile to file system and serve tile via some other means?
# cache tile or at least mapobj?
wms_req = self.request.params['REQUEST']
wms_ver = self.request.params.get('VERSION', '1.3.0')
# now do something based on REQUEST:
if wms_req == u'GetMap':
res = map.loadOWSParameters(ows_req, wms_ver) # if != 0 then error
img = map.draw()
return Response(img.getBytes(), content_type=img.format.mimetype)
elif wms_req == u'GetCapabilities':
mapscript.msIO_installStdoutToBuffer()
res = map.OWSDispatch(ows_req) # if != 0 then error
content_type = mapscript.msIO_stripStdoutBufferContentType()
content = mapscript.msIO_getStdoutBufferBytes()
return Response(content, content_type=content_type)
elif wms_req == u'GetFeatureInfo':
res = map.loadOWSParameters(ows_req, wms_ver) # if != 0 then error
mapscript.msIO_installStdoutToBuffer()
res = map.OWSDispatch(ows_req) # if != 0 then error
content_type = mapscript.msIO_stripStdoutBufferContentType()
content = mapscript.msIO_getStdoutBufferBytes()
return Response(content, content_type=content_type)
# We shouldn't end up here.....
# let's raise an Error
# FIXME: I am sure there are better pyramid ways to return errors
raise Exception('request was not handled correctly')
def wfs(self):
"""This is a WFS endpoint.
It uses mapserver mapscript to process a WFS request.
This endpoint requires an additional WFS parameter
DATA_URL. The DATA_URL, should point to a downloadable file
which can be used as raster data input for mapserver.
"""
LOG.debug('Processing ows request')
data_url = None
try:
data_url = self.request.GET.getone('DATA_URL')
except:
LOG.warn('No data_url provided')
data_url = None
# get location of local data file
# FIXME: May not be required if data is from DB
if data_url:
loc = fetch_file(self.request, data_url)
# get map
map = self._get_map()
# Check that appropriate files are already exist.
datadir, filename = os.path.split(loc)
#fname, fext = os.path.splitext(filename)
#if fext == '.zip':
# Check if shape file exists.
#if os.path.isfile(os.path.join(datadir, fname + ".shp")):
# dbFilename = os.path.join(datadir, fname + ".shp")
#elif os.path.isdir(os.path.join(datadir, fname)) and fname.endswith(".gdb"):
# dbFilename = os.path.join(datadir, fname)
#else:
# msg = "Invalid zip file '{}' -- is not in shape/gdb format.".format(filename)
# raise HTTPNotImplemented(msg)
#else:
# raise HTTPNotImplemented("Invalid zip file '{}'".format(filename))
# if DB server is configured, get layer data from DB server. Otherwise get data from db file.
# FIXME: filename shall be gdb/shape filename
layer = ShapeLayer(self.request, filename)
# add the shape layer into map
idx = layer.add_layer_obj(map)
# set map projection and extent from layer data
lx = map.getLayer(idx).getExtent()
map.extent = mapscript.rectObj(lx.minx, lx.miny, lx.maxx, lx.maxy)
map.setProjecntion = "init={}".format(layer._data['crs'])
# prepare an ows request object by copying request params
ows_req = mapscript.OWSRequest()
ows_req.loadParamsFromURL(self.request.query_string)
# here is probably some room for optimisation
# e.g. let mapscript write directly to output?
# write tile to file system and serve tile via some other means?
# cache tile or at least mapobj?
wfs_req = self.request.params['REQUEST']
wfs_ver = self.request.params.get('VERSION', '1.1.0')
# now do something based on REQUEST:
mapscript.msIO_installStdoutToBuffer()
res = map.OWSDispatch(ows_req) # if != 0 then error
content_type = mapscript.msIO_stripStdoutBufferContentType()
content = mapscript.msIO_getStdoutBufferBytes()
return Response(content, content_type=content_type)
def wfs(self):
"""This is a WFS endpoint.
It uses mapserver mapscript to process a WFS request.
This endpoint requires an additional WFS parameter
DATA_URL. The DATA_URL, should point to a downloadable file
which can be used as raster data input for mapserver.
"""
LOG.debug("Processing ows request")
data_url = None
try:
data_url = self.request.GET.getone("DATA_URL")
except:
LOG.warn("No data_url provided")
data_url = None
# get location of local data file
# FIXME: May not be required if data is from DB
if data_url:
loc = fetch_file(self.request, data_url)
# get map
map = self._get_map()
# Check that appropriate files are already exist.
datadir, filename = os.path.split(loc)
# fname, fext = os.path.splitext(filename)
# if fext == '.zip':
# Check if shape file exists.
# if os.path.isfile(os.path.join(datadir, fname + ".shp")):
# dbFilename = os.path.join(datadir, fname + ".shp")
# elif os.path.isdir(os.path.join(datadir, fname)) and fname.endswith(".gdb"):
# dbFilename = os.path.join(datadir, fname)
# else:
# msg = "Invalid zip file '{}' -- is not in shape/gdb format.".format(filename)
# raise HTTPNotImplemented(msg)
# else:
# raise HTTPNotImplemented("Invalid zip file '{}'".format(filename))
# if DB server is configured, get layer data from DB server. Otherwise get data from db file.
# FIXME: filename shall be gdb/shape filename
layer = ShapeLayer(self.request, filename)
# add the shape layer into map
idx = layer.add_layer_obj(map)
# set map projection and extent from layer data
lx = map.getLayer(idx).getExtent()
map.extent = mapscript.rectObj(lx.minx, lx.miny, lx.maxx, lx.maxy)
map.setProjecntion = "init={}".format(layer._data["crs"])
# prepare an ows request object by copying request params
ows_req = mapscript.OWSRequest()
ows_req.loadParamsFromURL(self.request.query_string)
# here is probably some room for optimisation
# e.g. let mapscript write directly to output?
# write tile to file system and serve tile via some other means?
# cache tile or at least mapobj?
wfs_req = self.request.params["REQUEST"]
wfs_ver = self.request.params.get("VERSION", "1.1.0")
# now do something based on REQUEST:
mapscript.msIO_installStdoutToBuffer()
res = map.OWSDispatch(ows_req) # if != 0 then error
content_type = mapscript.msIO_stripStdoutBufferContentType()
content = mapscript.msIO_getStdoutBufferBytes()
return Response(content, content_type=content_type)
