def _getLegendImages(self, infoList):
legendImages = []
for i in range(len(infoList)):
j = i + 1
info = infoList[i]
if info.legendURL is None:
continue
req = urllib2.Request(info.legendURL)
req.add_header('Cookie', request.headers.get('Cookie', ''))
try:
filehandle = openURL(req)
buffer = StringIO(filehandle.read())
im = Image.open(buffer)
filehandle.close()
except Exception, exc:
log.error("Error retrieving legend from URL %s: %s" % (info.legendURL, exc.__str__()))
else:
log.debug("info.legendURL = %s, im.size = %s" % (info.legendURL, im.size,))
labelImage = self._getLabelImage(j)
legendImages.append( (labelImage, im) )
def buildImage(layerInfoList, imageCache):
"""Fetches and merges the figure images.
@param layerInfoList: list of LayerInfo defining layers to include in the figure
@param imageCache: cache of images that have been generated for layers (used for animations
where dimensions only vary in the layer over which animation occurs)
"""
images = []
st = time.time()
log.debug("Starting buildImage")
size = None
layerIndex = 0
for layerInfo in layerInfoList:
if imageCache == None or imageCache[layerIndex] == None:
requestURL = wmc_util.parseEndpointString(layerInfo.endpoint, layerInfo.params)
req = urllib2.Request(requestURL)
req.add_header('Cookie', request.headers.get('Cookie', ''))
filehandle = wmc_util.openURL(req)
imageString = StringIO(filehandle.read())
img = Image.open(imageString)
layerInfo.cachedImage = img
if imageCache != None:
imageCache[layerIndex] = img
else:
img = imageCache[layerIndex]
images.append(img)
size = img.size
log.debug("img.size = %s, img.mode = %s" % (img.size, img.mode,))
layerIndex = layerIndex + 1
background = Image.new('RGBA', size, (255,255,255,255))
log.debug("creating final image...")
images.reverse()
images.insert(0, background)
finalImg = merge(*images)
log.debug("finished buildImage in %s" % (time.time() - st,))
return finalImg
def parseCowsCatalog(cowsEndpoint):
req = urllib2.Request(cowsEndpoint)
fh = openURL(req)
htmlString = fh.read()
fh.close()
doc = libxml2dom.parseString(htmlString, html=1)
COWSLinks = []
for liElt in doc.getElementsByTagName("li"):
childText = ""
links = {}
for c in liElt.childNodes:
# get the name by adding together all the text elements and then
# stripping whitespace and [].
if c.nodeType == 3:
childText += c.nodeValue
# build a dictionary of the links with their ascociated text
elif c.nodeName == 'a' and c.hasAttribute('href'):
liknName = str(''.join(c.textContent.split())) # removing whitespace and converting from unicode
href = c.getAttribute('href')
linkTarget = urlparse.urljoin(cowsEndpoint, href)
links[liknName] = str(linkTarget)
childText = ''.join(childText.split()) # strip the whitespace
childText = str(childText.replace('[]','')) # remove any angle brackets
COWSLinks.append((childText, links))
return COWSLinks