def json_response(function=None, *args, **kwargs):
try:
response = function(*args, **kwargs)
except Exception as e:
error = {
'error': {
'message': unicode(e)
}
}
response = HttpResponseServerError()
response.content = json.dumps(error, separators=(',', ':'))
response['Content-Type'] = 'application/json'
return response
def getraster(request):
assert isinstance(request, HttpRequest)
json_request = json.dumps(request.GET)
try:
rparm = request.GET.get('param', None)
rtime = extract_time(request)
cmap = request.GET.get('cmap','binary')
body = cache.blobstore.get_blob_to_bytes('ice2ocean',json_request)
response = HttpResponse(body,'image/png')
return response
except:
try:
### AAA new method of extracting an image based on param
if rparm in ('roff','prec'):
control = fieldManager.getInfo(rparm)
# ds = b.fetch_ds(rparm,rtime)
ds = b.fetch_ds2(rparm)
print ds
#lats = ds.variables['latitude'][:]
#lons = ds.variables['longitude'][:]
#dataField = ds.variables[control["RowKey"]][:].reshape(len(lats),len(lons))
#ds.close()
# AAA leave out the reprojection for now
#plons,plats = bingProjection(lons,lats)
#plons = plons[0,:]
#plats = plats[:,0]
#print plons, plats
# x = np.arange(xMin, xMin + cellSize * fh.nx, cellSize)
# y = np.arange(yMin, yMin + cellSize * fh.ny, cellSize)
#for aRow in parfile:
# if (aRow[0] != '!'):
# t = aRow.split('=')[0].strip()
# try:
# exec(t + " = " + aRow.split('=')[1].strip())
# except:
# a = 1
nx = 1810
ny = 900
d = ds.reshape(-1,ny,nx)
subset = d[0,:,:]
img = subset*(subset > 0)
y, x = np.mgrid[0:ny,0:nx]
buf = BytesIO()
plt.imshow(img)
#plot_to_bytes(lons,lats,dataField,buf,float(control["color_min"]), float(control["color_max"]), cmap_name=cmap)
plot_to_bytes(x,y,img,buf,float(control["color_min"]), float(control["color_max"]), cmap_name=cmap)
buf.seek(0)
data = buf.read()
buf.close()
cache.blobstore.put_block_blob_from_bytes('ice2ocean',json_request,data)
response = HttpResponse(data,'image/png')
else:
control = fieldManager.getInfo(rparm)
ds = b.fetch_ds(rtime)
if not ds:
oops = HttpResponseServerError()
oops.content = "Unable to retrieve data for request {0}".format(json_request)
return oops
lats = ds.variables['lat_psi'][:]
lons = ds.variables['lon_psi'][:]
plons,plats = bingProjection(lons,lats)
plons = plons[0,:]
plats = plats[:,0]
slab = depthSliceOnly(rtime,float(rdepth),control["RowKey"])[1:,1:]
ds.close()
buf = BytesIO()
plot_to_bytes(plons,plats,slab,buf,float(control["color_min"]), float(control["color_max"]),cmap_name=cmap)
buf.seek(0)
data = buf.read()
buf.close()
cache.blobstore.put_block_blob_from_bytes('liveocean', json_request, data)
response = HttpResponse(data,'image/png')
return response
except Exception as a:
try:
ds.close()
except:
print ""
a.message
return cr.invalid_parameter()
