CkPython

How to Generate an Azure Storage Account Shared Access Signature (SAS)

See more Azure Cloud Storage Examples

Shows how to generate a Shared Access Signature (SAS) for an Azure Storage Account.

Note: This example requires Chilkat v9.5.0.65 or greater.

CkPython

import sys
import chilkat

# Note: Requires Chilkat v9.5.0.65 or greater.

# This requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# --------------------------------------------------------------------------
# Create a Shared Access Signature (SAS) token for an Azure Storage Account.
# --------------------------------------------------------------------------

# See https://docs.microsoft.com/en-us/rest/api/storageservices/fileservices/constructing-an-account-sas 
# for details regarding the Azure Storage Account SAS fields.

authSas = chilkat.CkAuthAzureSAS()
authSas.put_AccessKey("AZURE_ACCESS_KEY")

# Specify the format of the string to sign.
# Each comma character in the following string represents a LF ("\n") character.
# The names specified in the StringToSign are replaced with the values specified
# in the subsequent calls to SetTokenParam and SetNonTokenParam,.

# Note: The trailing comma in the StringToSign is intentional and important. This indicates that the 
# string to sign will end with a "\n".

# Also note: The names in the StringToSign are case sensitive.  The names
# specified in the 1st argument in the calls to SetNonTokenParam and SetTokenParam should
# match a name listed in StringToSign. 
authSas.put_StringToSign("accountname,signedpermissions,signedservice,signedresourcetype,signedstart,signedexpiry,signedIP,signedProtocol,signedversion,")

#  The account name is "chilkat".  Use your own account name instead of "chilkat".
#  Also use your own container name instead of "mycontainer".
authSas.SetNonTokenParam("accountname","chilkat")

authSas.SetTokenParam("signedpermissions","sp","rwdlacup")
authSas.SetTokenParam("signedservice","ss","bfqt")
authSas.SetTokenParam("signedresourcetype","srt","sco")

dt = chilkat.CkDateTime()
dt.SetFromCurrentSystemTime()
authSas.SetTokenParam("signedstart","st",dt.getAsIso8601("YYYY-MM-DDThh:mmTZD",False))

# This SAS token will be valid for 30 days.
dt.AddDays(30)
authSas.SetTokenParam("signedexpiry","se",dt.getAsIso8601("YYYY-MM-DDThh:mmTZD",False))

authSas.SetTokenParam("signedProtocol","spr","https")

#  Specifiy values and query param names for each field.
#  If a field is not specified, then an empty string will be used for its value.
authSas.SetTokenParam("signedversion","sv","2015-04-05")

# Note that we did not call SetTokenParam for "signedIP".  For any omitted fields
# the value will default to the empty string.

# Generate the SAS token.
sasToken = authSas.generateToken()
if (authSas.get_LastMethodSuccess() != True):
    print(authSas.lastErrorText())
    sys.exit()

print("SAS token: " + sasToken)

# Save the SAS token to a file.
# We can then use this pre-generated token for future Azure Storage Account operations.
fac = chilkat.CkFileAccess()
fac.WriteEntireTextFile("qa_data/tokens/azureStorageAccountSas.txt",sasToken,"utf-8",False)