def get_wms_response(query_string, base_url, out_format, layers):
group = 'raster_layers'
layer_names = []
for layer in layers:
name = layer.get('name')
if name:
layer_names.append(name)
req = get_wms_request(query_string=query_string, layer_names=layer_names)
src_map = get_map(base_url=base_url,
out_format=out_format,
layers=layers,
group=group)
# raise ValueError(src_map.outputformat.imagemode, mapscript.MS_IMAGEMODE_INT16)
mapscript.msIO_installStdoutToBuffer()
try:
src_map.OWSDispatch(req)
error = False
except mapscript.MapServerError:
error = True
content_type = mapscript.msIO_stripStdoutBufferContentType()
content = mapscript.msIO_getStdoutBufferBytes()
mapscript.msIO_resetHandlers()
# if content_type == 'vnd.ogc.se_xml':
# content_type = 'text/xml'
return content, content_type, error
def render(self, extent, size):
message = ""
mapObj = self.getMapObj()
mapObj.setConfigOption("MS_ERRORFILE", "stdout")
mapObj.debug = 5
mapObj.setExtent(extent.xMinimum(), extent.yMinimum(), extent.xMaximum(), extent.yMaximum())
mapObj.setSize(int(size[0]), int(size[1]))
message += "Rendering %s" % extent.toString()
data = ""
try:
mapscript.msIO_installStdoutToBuffer()
mapImage = mapObj.draw() # = mapscript.imageObj(int(size[0]), int(size[1]), self.mime_type)
data = mapImage.getBytes()
message += "Image size: %s" % str(len(data))
out = mapscript.msIO_getStdoutBufferString()
mapscript.msIO_resetHandlers()
message += out
except mapscript.MapServerError as err:
message += str(err)
return data, message
def render(self, extent, size):
message = ""
mapObj = self.getMapObj()
mapObj.setConfigOption("MS_ERRORFILE", "stdout")
mapObj.debug = 5
mapObj.setExtent(extent.xMinimum(), extent.yMinimum(), extent.xMaximum(), extent.yMaximum())
mapObj.setSize(int(size[0]), int(size[1]))
message += "Rendering %s" % extent.toString()
data = ''
try:
mapscript.msIO_installStdoutToBuffer()
mapImage = mapObj.draw() #= mapscript.imageObj(int(size[0]), int(size[1]), self.mime_type)
data = mapImage.getBytes()
message += "Image size: %s" % str(len(data))
out = mapscript.msIO_getStdoutBufferString()
mapscript.msIO_resetHandlers()
message += out
except mapscript.MapServerError as err:
message += str(err)
return data, message
def render(self):
""" Render this map object
This will inspect the OWS request type, and render the correct image
for the request.
Known supported OWS REQUEST values:
* GetLegendGraphic: Will render the legend for the OWS request
* GetMap: Will render the map tile for the OWS request
"""
log = logging.getLogger(__name__)
content = None # the bytes of the rendered image
content_type = None # the image mimetype
retval = None # the OWS return value, useful for debugging
with self.__class__.MAPSCRIPT_RLOCK:
try:
ows_request_type = self.ows_request.getValueByName('REQUEST')
if (ows_request_type == 'GetLegendGraphic'):
# Draw the legend for the map
retval = self.loadOWSParameters(self.ows_request)
image = self.drawLegend()
content = image.getBytes()
content_type = image.format.mimetype
elif (ows_request_type == 'GetMap'):
# Draw the map (tiles)
retval = self.loadOWSParameters(self.ows_request)
image = self.draw()
content = image.getBytes()
content_type = image.format.mimetype
else:
# Unexpected OWS request. Do our best to support it by
# falling back to using the OWS Dispatch
# Tell mapscript to start capturing the stdout in a buffer
mapscript.msIO_installStdoutToBuffer()
# dispatch the OWS request
retval = self.OWSDispatch(self.ows_request)
# Get the content type of the return value
content_type = mapscript.msIO_stripStdoutBufferContentType()
# Get the content of the resulting image
content = mapscript.msIO_getStdoutBufferBytes()
if retval != mapscript.MS_SUCCESS:
# Failed to render the desired image
raise RuntimeError("Failed to render map OWS request")
except:
log.error("Error while trying to render map: %s", sys.exc_info()[0])
raise
finally:
# Reset the mapscript I/O pointers back to where they should be
mapscript.msIO_resetHandlers()
return content, content_type, retval
def application(self, env, start_response):
q_str = {
my.split("=")[0].upper(): my.split("=")[1]
for my in env['QUERY_STRING'].split('&') if "=" in my
}
serv_ver = [q_str.get('SERVICE', False), q_str.get('VERSION', False)]
print "-" * 30
for key in self.MAPSERV_ENV:
if key in env:
os.environ[key] = env[key]
print "{0}='{1}'".format(key, env[key])
else:
os.unsetenv(key)
print "QUERY_STRING=("
for key in q_str:
print " {0}={1},".format(key, q_str[key])
print ")"
print "-" * 30
request = mapscript.OWSRequest()
mapscript.msIO_installStdoutToBuffer()
request.loadParamsFromURL(env['QUERY_STRING'])
rec_obj = self.mapscript_obj.clone()
try:
status_id = rec_obj.OWSDispatch(request)
except Exception as err:
print "OWSDispatch Error: {}".format(err)
err_def = unicode(err).split(':')[0]
status_id = None
content_type = mapscript.msIO_stripStdoutBufferContentType()
result = mapscript.msIO_getStdoutBufferBytes()
mapscript.msIO_resetHandlers()
# status:
if status_id == mapscript.MS_SUCCESS:
status = '200 OK'
elif status_id == mapscript.MS_FAILURE:
status = '400 Bad request'
if serv_ver == ['WFS', '2.0.0']:
result = '\n'.join(result.split('\n')[2:])
elif status_id is None:
if serv_ver[0] == "WMS" and err_def == "msPostGISLayerGetExtent()":
status = '200 OK'
elif serv_ver == ['WFS', '1.0.0'
] and err_def == "msWFSGetFeature()":
status = '400 Bad request'
else:
status = '500 Server Error'
start_response(status, [('Content-type', str(content_type))])
return [result]
def request_mapscript(self, env, mapdata, que=None):
"""
render on mapserver mapscript request
"""
q_str = {
my.split("=")[0].upper(): my.split("=")[1]
for my
in env['QUERY_STRING'].split('&')
if "=" in my
}
serv_ver = [q_str.get('SERVICE', False), q_str.get('VERSION', False)]
request = mapscript.OWSRequest()
mapscript.msIO_installStdoutToBuffer()
request.loadParamsFromURL(env['QUERY_STRING'])
rec_obj = mapdata.clone()
try:
status_id = rec_obj.OWSDispatch(request)
except Exception as err:
print "OWSDispatch Error: {}".format(err)
err_def = unicode(err).split(':')[0]
status_id = None
content_type = mapscript.msIO_stripStdoutBufferContentType()
content = mapscript.msIO_getStdoutBufferBytes()
mapscript.msIO_resetHandlers()
# status:
if status_id == mapscript.MS_SUCCESS:
status = 200
elif status_id == mapscript.MS_FAILURE:
status = 400
if serv_ver == ['WFS', '2.0.0']:
content = '\n'.join(content.split('\n')[2:])
elif status_id is None:
if serv_ver[0] == "WMS" and err_def == "msPostGISLayerGetExtent()":
status = 200
elif serv_ver == ['WFS', '1.0.0'] and err_def == "msWFSGetFeature()":
status = 400
else:
status = 500
else:
status = 500
out_response = (
status,
content_type,
content
)
if que is None:
return out_response
else:
que.put(out_response)
def render(self, extent, size):
mapObj = mapscript.mapObj(self.mapfile)
mapObj.setConfigOption("MS_ERRORFILE", "stdout")
mapObj.debug = 5
mapObj.setExtent(extent.xMinimum(), extent.yMinimum(), extent.xMaximum(), extent.yMaximum())
mapObj.setSize(int(size[0]), int(size[1]))
self.messageTextEdit.append("Rendering " + extent.toString())
mapscript.msIO_installStdoutToBuffer()
mapImage = mapObj.draw() # = mapscript.imageObj(int(size[0]), int(size[1]), self.mime_type)
data = mapImage.getBytes()
out = mapscript.msIO_getStdoutBufferString()
mapscript.msIO_resetHandlers()
self.messageTextEdit.append(out)
return data
def process_request(django_request, map_obj):
"""Offload the processing of the OWS request to MapServer.
:arg django_request: the request parameters
:type django_request: HttpRequest
:arg map_obj: the in-memory mapfile to use
:type map_obj: mapscript.mapObj
:return: the mapserver buffer with the output from processing the request
"""
if django_request.method == 'GET':
params = django_request.GET
elif django_request.method == 'POST':
# get the params from the XML body of the request
raise Exception
# build the WMS request
wms_req = mapscript.OWSRequest()
for k, v in params.items():
wms_req.setParameter(k, v)
# install a mapserver IO handler directing future stdout to a memory buffer
output_buffer = mapscript.msIO_installStdoutToBuffer()
# dispatch the request to mapserver
map_obj.OWSDispatch(wms_req)
# get back mapserver's response
# ms_headers = mapscript.msIO_stripStdoutBufferContentHeaders()
ms_content_type = mapscript.msIO_stripStdoutBufferContentType()
ms_content = mapscript.msIO_getStdoutBufferBytes()
if ms_content == 'application/vnd.ogc.se_xml':
ms_content = 'Content-Type: text/xml\n\n{}'.format(ms_content)
# reset the stdin/stdout handlers
mapscript.msIO_resetHandlers()
return ms_content, ms_content_type
def render(self, extent, size):
mapObj = self.getMapObj()
mapObj.setConfigOption("MS_ERRORFILE", "stdout")
mapObj.debug = 5
mapObj.setExtent(extent.xMinimum(), extent.yMinimum(), extent.xMaximum(), extent.yMaximum())
mapObj.setSize(int(size[0]), int(size[1]))
self.messageTextEdit.append( "Rendering " + extent.toString() )
data = ''
try:
mapscript.msIO_installStdoutToBuffer()
mapImage = mapObj.draw() #= mapscript.imageObj(int(size[0]), int(size[1]), self.mime_type)
data = mapImage.getBytes()
self.messageTextEdit.append( "Image size: " + str(len(data)) )
out = mapscript.msIO_getStdoutBufferString()
mapscript.msIO_resetHandlers()
self.messageTextEdit.append( out )
except mapscript.MapServerError as err:
self.messageTextEdit.append( str(err) )
return data
def render(self):
""" Render this map object
This will inspect the OWS request type, and render the correct image
for the request.
Known supported OWS REQUEST values:
* GetLegendGraphic: Will render the legend for the OWS request
* GetMap: Will render the map tile for the OWS request
"""
log = logging.getLogger(__name__)
content = None # the bytes of the rendered image
content_type = None # the image mimetype
retval = None # the OWS return value, useful for debugging
# TODO: do I need alock here?
# with LockFile(self.data_file_path + '.lock'):
if True:
try:
ows_request_type = self.ows_request.getValueByName('REQUEST')
if (ows_request_type == 'GetLegendGraphic'):
# Draw the legend for the map
retval = self.loadOWSParameters(self.ows_request)
image = self.drawLegend()
content = image.getBytes()
content_type = image.format.mimetype
elif (ows_request_type == 'GetMap'):
# Draw the map (tiles)
retval = self.loadOWSParameters(self.ows_request)
image = self.draw()
content = image.getBytes()
content_type = image.format.mimetype
else:
# Unexpected OWS request. Do our best to support it by
# falling back to using the OWS Dispatch
# Tell mapscript to start capturing the stdout in a buffer
mapscript.msIO_installStdoutToBuffer()
# dispatch the OWS request
retval = self.OWSDispatch(self.ows_request)
# Get the content type of the return value
content_type = mapscript.msIO_stripStdoutBufferContentType(
)
# Get the content of the resulting image
content = mapscript.msIO_getStdoutBufferBytes()
if retval != mapscript.MS_SUCCESS:
# Failed to render the desired image
raise RuntimeError("Failed to render map OWS request")
except:
log.error("Error while trying to render map: %s",
sys.exc_info()[0])
raise
finally:
# Reset the mapscript I/O pointers back to where they should be
mapscript.msIO_resetHandlers()
return content, content_type, retval
