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Added datemodified property #28

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Added datemodified property #28

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28 changes: 27 additions & 1 deletion thredds_crawler/crawl.py
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Original file line number Diff line number Diff line change
Expand Up @@ -255,7 +255,8 @@ def __init__(self, dataset_url, auth=None):
self.name = None
self.catalog_url = None
self.data_size = None

self.date_modified = None

# Get an etree object
r = requests.get(dataset_url, auth=auth, verify=False)
try:
Expand All @@ -269,6 +270,13 @@ def __init__(self, dataset_url, auth=None):
self.name = dataset.get("name")
metadata = dataset.find("{%s}metadata" % INV_NS)
self.catalog_url = dataset_url.split("?")[0]

#Date modified
date_modified = dataset.find("{%s}date" % INV_NS)
if date_modified is not None:
date_type = date_modified.get('type')
if date_type=="modified":
self.date_modified = date_modified.text

# Data Size - http://www.unidata.ucar.edu/software/thredds/current/tds/catalog/InvCatalogSpec.html#dataSize
data_size = dataset.find("{%s}dataSize" % INV_NS)
Expand Down Expand Up @@ -323,6 +331,24 @@ def __init__(self, dataset_url, auth=None):
except BaseException as e:
logger.exception('Could not process {}. {}.'.format(dataset_url, e))

@property
def datemodified(self):
if self.date_modified is not None:
return self.date_modified
try:
dap_endpoint = next(s.get("url") for s in self.services if s.get("service").lower() == "opendap")
# Get date_modified from DDS (global attributes)
try:
import netCDF4
nc = netCDF4.Dataset(dap_endpoint)
if "date_modified" in nc.ncattrs():
return nc.getncattr("date_modified")
except ImportError:
logger.error("The python-netcdf4 library is required for computing the size of this dataset.")
return None
except:
return None

@property
def size(self):
if self.data_size is not None:
Expand Down