def isRfcSdkAvailableForDownload(self,
blobUrl: str,
storageAccount: AzureStorageAccount) -> tuple:
try:
blobService = BlockBlobService(account_name=storageAccount.accountName,
account_key=storageAccount.getAccessKey())
(accountName, containerName, blobName) = self._getBlobContainerAndName(blobUrl)
if (not blobService.exists(container_name=containerName, blob_name=blobName)):
# rfc sdk blob does not exist so we have no last modified time
self.tracer.error("error validating rfc sdk blob: blob does not exist at url:%s", blobUrl)
return (False, datetime.min)
metadata = blobService.get_blob_properties(container_name=containerName, blob_name=blobName)
lastModifiedTime = metadata.properties.last_modified
self.tracer.info("found rfc sdk package blob at url:%s with last_modified:%s",
blobUrl,
lastModifiedTime)
return (True, lastModifiedTime)
except Exception as e:
self.tracer.error("error validating rfc sdk blob: exception trying to access url:%s (%s)",
blobUrl,
e,
exc_info=True)
return (False, datetime.min)
def downloadAndInstallRfcSdk(self,
blobUrl: str,
storageAccount: AzureStorageAccount) -> bool:
self.tracer.info("begin download and install of rfc sdk blob: %s", blobUrl)
# start out with default since we can only persist sdk package
# last modified date if we were able to fetch metadata for the blob
lastModifiedTime = datetime.min
wasSuccessful = False
try:
# create download folder
self._createSdkInstallPathIfNotExists()
blobService = BlockBlobService(account_name=storageAccount.accountName,
account_key=storageAccount.getAccessKey())
(accountName, containerName, blobName) = self._getBlobContainerAndName(blobUrl)
if (not blobService.exists(container_name=containerName, blob_name=blobName)):
raise Exception("rfc sdk blob does noty exist! url:%s" % blobUrl)
# extract metadata properties from blob so that we can attempt to download
# to local file with same name as the blob itself, and also persist
# the last modified time of the blob itself
metadata = blobService.get_blob_properties(container_name=containerName, blob_name=blobName)
lastModifiedTime = metadata.properties.last_modified
downloadFilePath = os.path.join(self.installPath, blobName)
# download sdk package to local install folder and unpack it
self._downloadAndUnzip(blobService, containerName, blobName, downloadFilePath)
# setup pyrfc environment variables and dynamic library loading configuration
self.initRfcSdkEnvironment()
# finally, verify that we can succesfully import the pyrfc module
if (not self.isRfcSdkInstalled()):
raise Exception("RFC SDK installation attempt failed!")
self.tracer.info("RFC SDK installed successfully")
wasSuccessful = True
except Exception as e:
wasSuccessful = False
self.tracer.error("exception trying to download and install RFC SDK from url: %s, " +
"installPath: %s, exception: (%s)",
blobUrl,
self.installPath,
e,
exc_info=True)
try:
# persist installation attempt timestamp and (if available) the last modified
# time of the downloaded sdk blob so we only update installation in future if it changes
self._writeSdkInstallationState(status='success' if wasSuccessful else 'failed',
lastInstallAttemptTime=datetime.now(timezone.utc),
packageLastModifiedTime=lastModifiedTime)
except Exception as e:
# failure to persist installation state file is treated as installation failure
wasSuccessful = False
return wasSuccessful