def get_layer_points_wfs(self, layer, bbox, max_features):
# Get points in bbox by creating/dispatching an WFS GetFeature
# internally. This is a nice abstraction from various source types like
# PostGIS, Shape etc.
wfs_req = mapscript.OWSRequest()
wfs_req.setParameter("SERVICE", "WFS")
wfs_req.setParameter("VERSION", "1.1.0")
wfs_req.setParameter("REQUEST", "GetFeature")
wfs_req.setParameter("TYPENAME", layer)
wfs_req.setParameter("BBOX", bbox)
wfs_req.setParameter("VERSION", "1.1.0")
# wfs_req.setParameter( 'SRSNAME', "EPSG:4326") ?????
# TODO: reproject response points
mapscript.msIO_installStdoutToBuffer()
self.map.OWSDispatch(wfs_req)
# print 'bbox=' + wms_req.getValueByName('BBOX')
mapscript.msIO_stripStdoutBufferContentType()
content = mapscript.msIO_getStdoutBufferString()
# Parse WFS result into array of Point (slooow, TODO optimize)
parser = WFSParser(mapscript.msGetVersionInt() >= 50600, max_features)
return parser.parse(content)
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 ows_req(self):
# http://mapserver.org/ogc/mapscript.html#python-examples
ows_req = mapscript.OWSRequest()
ows_req.loadParams()
req_str = ows_req.getValueByName("REQUEST")
styles = ows_req.getValueByName("STYLES")
do_heatmap = styles and styles.startswith("heat")
# Filter out "graphic" WMS requests
if req_str == "GetMap" and do_heatmap:
self.wms_getheatmap_req(ows_req)
return
elif req_str == "GetLegendGraphic":
# GetLegendGraphic may have a optional STYLE parameter
# if this indicates a heatmap style defer to our own implementation
# to return heatmap gradient image as style for now.
style = ows_req.getValueByName("STYLE")
if style and style.startswith("heat"):
self.wms_getheatmaplegend_req(ows_req)
return
# All other OWS (WFS/WMS-non-graphic) are XML-based
# and can be dispatched/returned directly
ows_req.setParameter("STYLES", "")
mapscript.msIO_installStdoutToBuffer()
self.map.OWSDispatch(ows_req)
if req_str == "GetMap":
content = mapscript.msIO_getStdoutBufferBytes()
else:
content_type = mapscript.msIO_stripStdoutBufferContentType()
content = mapscript.msIO_getStdoutBufferString()
if (
content_type == "vnd.ogc.se_xml"
or content_type == "application/vnd.ogc.wms_xml"
or content_type == "application/vnd.ogc.gml"
):
content_type = "text/xml"
print("Content-type: " + content_type)
print
print(content)
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 application(environ, start_response):
try:
req = mapscript.OWSRequest()
req.loadParamsFromURL(environ.get('QUERY_STRING'))
map = mapscript.mapObj(args.map_file)
mapscript.msIO_installStdoutToBuffer()
map.OWSDispatch(req)
content_type = mapscript.msIO_stripStdoutBufferContentType()
content = mapscript.msIO_getStdoutBufferBytes()
if content_type == 'vnd.ogc.se_xml':
content_type = 'text/xml'
start_response('200 Ok', [('Content-type', content_type)])
return [content]
except:
start_response('500 Ooops', [('Content-type', 'text/plain')])
return ['An error occured\n' + mapscript.msIO_getStdoutBufferString()]
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
#!/usr/bin/env python import sys import mapscript req = mapscript.OWSRequest() req.loadParams() mapscript.msIO_installStdoutToBuffer() map.OWSDispatch( req ) print 'Content-type: text/plain' print print mapscript.msIO_getStdoutBufferString()