def hasPath(self, i, j):
i # watchvar i
j # watchvar j
n, m = len(self.matrix), len(self.matrix[0])
helper.dbg(self.dp + [i, j]) # Function call to debug
if i >= n or i < 0 or j >= m or j < 0: # Out of bounds
return False
if self.matrix[i][j] == 0:
self.dp[i][j] = 3
return False
if self.dp[i][j] == 1: # Gray
return False
if self.dp[i][j] == 3:
return False
if self.dp[i][j] == 4:
return True
ans = False
self.dp[i][j] = 1
right = self.hasPath(i + 1, j)
left = self.hasPath(i - 1, j)
up = self.hasPath(i, j + 1)
down = self.hasPath(i, j - 1)
ans = right or left or down or up
self.dp[i][j] = 4 if ans else 3
return ans
def mapserver(params,mapfile):
""" Function implementing mapserver functionality.
params: dictionary of query string of a mapserver GET request
mapfile: path to mapfile
returns: tuple with content type and response body
"""
helper.dbg("creating map for: " + mapfile)
request = mapscript.OWSRequest()
#request.loadParams()
for k in params:
#helper.dbg( "%s : %s" % (k,params[k]))
request.setParameter(k,params[k])
# change the style INSPIRE:DEFAULT back to an empty string otherwise Mapserver will complain
styles = request.getValueByName('STYLES')
if (styles is not None and styles.count(default_style) > 0):
styles = styles.replace(default_style, "")
request.setParameter("STYLES", styles)
style = request.getValueByName('STYLE')
if style == default_style:
request.setParameter("STYLE", "")
map = mapscript.mapObj( mapfile )
mapscript.msIO_installStdoutToBuffer()
map.OWSDispatch( request )
content_type = mapscript.msIO_stripStdoutBufferContentType()
content = mapscript.msIO_getStdoutBufferBytes()
operation = request.getValueByName('REQUEST')
version = request.getValueByName('VERSION')
if (version == '1.3.0' or version is None) and operation.upper() == 'GETCAPABILITIES':
content = altercapabilities(content, namespace, prefix, schemaLocation, language)
#response = 'Content-type: %s\n%s' % (content_type,content)
return [content_type, content]
def _savefile( self ):
"""
save the user supplied file under the data directory
"""
# create uuid-based directory
helper.dbg("Creating dir: " + self.extractdir)
os.mkdir(self.extractdir, 0770)
# save zipfile under that dir
f = open ( self.zfilepath, "w" )
f.write(self.zfiledata.read())
f.close()
def savemap( self, wms_url ):
"""
Generate a mapfile based on user data. The mapfile's name is based on the uuid associated to the request
pdata: list of dictionaries returned from from ogrprobe
returns: path to mapfile relative to mapfile_base_dir in config.ini
"""
mapfileStr = helper.createMapfile( wmsname = self.zfilename, wmsurl = wms_url, extent= self.wms_md["extent"], units = 'METERS', wms = self)
self.mapfile = os.path.join(configuration.getMapfileDir() , self.uuid + ".map")
f = open(self.mapfile, "w")
f.write(mapfileStr)
f.close()
helper.dbg("Wrote Mapfile: " + self.mapfile)
def saveconf( self ):
if ( (self.rasters == None) and (self.vectors == None) ):
raise IOError("Trying to save null data!")
metadata_file = open(os.path.join ( self.extractdir, 'metadata.json' ), 'w')
metadata={}
metadata["rasters"] = self.rasters
metadata["vectors"] = self.vectors
metadata["ip"] = self.ip
metadata["datasetname"] = self.datasetname
metadata["zfilename"] = self.zfilename
metadata["time"] = self.time
metadata["protected"] = self.protected
metadata["wms_md"] = self.wms_md
json.dump(metadata, metadata_file)
metadata_file.close()
helper.dbg("saved metadata")
def loadFromFile(self, uuid):
"""
Create a wms based on saved configuration.
uuid: the uuid corresponding to the saved wms instance
@exceptions: file does not exist, parse error
"""
self.uuid = uuid
self.extractdir = os.path.join (configuration.getDataDir(), self.uuid)
helper.dbg("loading saved uuid: " + self.uuid)
metadata_file = open(os.path.join ( self.extractdir, 'metadata.json' ), 'r')
metadata = json.load( metadata_file )
metadata_file.close()
if metadata == None:
raise ValueError("Cannot parse metadata.json for uuid: " + uuid)
self.rasters = metadata["rasters"]
self.vectors = metadata["vectors"]
self.layers = self.rasters + self.vectors
self._addlayersid()
self.ip = metadata["ip"]
self.datasetname = metadata["datasetname"]
self.zfilename = metadata["zfilename"]
self.zfilepath = os.path.join (self.extractdir, self.zfilename)
self.time = metadata["time"]
self.protected = metadata["protected"]
self.wms_md = metadata["wms_md"]
helper.dbg("Loaded RASTERS: " + `self.rasters`)
helper.dbg("Loaded VECTORS: " + `self.vectors`)
def loadFromWeb(self, ip, uploadFilename, uploadFile):
"""
Create a wms based on a uploaded zip file.
ip: remote address
uploadFilename: upload user name of file (string)
uploadFile: uploaded user file (file pointer made available by WSGI server)
"""
helper.dbg("Filename was: " + uploadFilename )
self.ip = ip
self.uuid = uuid.uuid4().hex
self.zfilename = uploadFilename
self.zfiledata = uploadFile
self.extractdir = os.path.join (configuration.getDataDir(), self.uuid)
self.zfilepath = os.path.join (self.extractdir, self.zfilename)
self.time = time.strftime('%d%m%y-%H:%M:%S')
self._savefile()
self.rasters = [] # list of probe results for rasters
self.vectors = [] # list of probe results for vectors
f = geozip.GeoZip(self.zfilepath)
if f.check_integrity() == False:
raise IOError("Checksum error: zipfile is corrupted")
#extract all files under extractdir
f.extract(self.extractdir)
#group by name
f.group_files()
#probe all the properties of geotiffs
self.rasters = [ helper.probedata(x) for x in f.getGeoTiffFiles() ]
self.vectors = [ helper.probedata(x) for x in f.getShapeFiles() ]
helper.dbg("Extracted RASTERS: " + `self.rasters`)
helper.dbg("Extracted VECTORS: " + `self.vectors`)
self.datasetname = helper.getBaseName(self.zfilename)
self.layers = self.rasters + self.vectors
self._addlayersid()
self.wms_md = { "title": self.datasetname , "Language" : "ENG", "Keywords":"IGIBS, View Service", "Fees": "N/A", "protected": self.protected, "extent": [ -7.55645, 49.76688, 3.6342, 61.465701 ], "projection" : "epsg:4326" }
helper.dbg("DatasetName: " + `self.datasetname`)
helper.dbg("zfilename: " + `self.zfilename`)