(Chilkat2-Python) S3 Upload String using AWS Signature Version 2

Example to upload the contents of a string to the Amazon S3 service, using the older AWS Signature Version 2.

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import sys
import chilkat2

# Demonstrates how to use older AWS S3 Signature Version 2 for uploading the contents
# of a string variable to an object in a bucket.

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

rest = chilkat2.Rest()

# Connect to the Amazon AWS REST server.
bTls = True
port = 443
bAutoReconnect = True
# The file is uploaded to the bucket named "chilkat100", which becomes part of the domain:
success = rest.Connect("chilkat100.s3.amazonaws.com",port,bTls,bAutoReconnect)

# ----------------------------------------------------------------------------
# Important: For buckets created in regions outside us-east-1,
# there are three important changes that need to be made.
# See Working with S3 Buckets in Non-us-east-1 Regions for the details.
# ----------------------------------------------------------------------------

# Provide AWS credentials for the REST call.
authAws = chilkat2.AuthAws()
authAws.AccessKey = "AWS_ACCESS_KEY"
authAws.SecretKey = "AWS_SECRET_KEY"
authAws.ServiceName = "s3"

# For AWS Signature Version 2, the following two properties need to be set:
authAws.SignatureVersion = 2
# See http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html#ConstructingTheCanonicalizedResourceElement
# The bucket is "chilkat100", and the uriPath is "/hamlet_play.xml", which must match
# the URI path passed to the FullRequestString method below.
authAws.CanonicalizedResourceV2 = "/chilkat100/hamlet_play.xml"

success = rest.SetAuthAws(authAws)

# Load a text file into memory.
fac = chilkat2.FileAccess()
fileContents = fac.ReadEntireTextFile("qa_data/xml/hamlet.xml","utf-8")
if (fac.LastMethodSuccess != True):
    print(fac.LastErrorText)
    sys.exit()

# To send the file in gzip or deflate compressed format, set the Content-Encoding request
# header to "gzip" or "deflate".  (this is optional)
success = rest.AddHeader("Content-Encoding","gzip")

# Indicate the Content-Type of our upload.  (This is optional)
success = rest.AddHeader("Content-Type","text/xml")

# We can add an "Expect: 100-continue" header so that if the request is rejected
# by the server immediately after receiving the request header, it can respond
# and the client (Chilkat) can avoid sending the file data.
# (this is optional)
success = rest.AddHeader("Expect","100-continue")

# Upload the file to Amazon S3.
responseBodyStr = rest.FullRequestString("PUT","/hamlet_play.xml",fileContents)
if (rest.LastMethodSuccess != True):
    print(rest.LastErrorText)
    sys.exit()

# Did we get a 200 response indicating success?
statusCode = rest.ResponseStatusCode
if (statusCode != 200):
    print("Error response: " + responseBodyStr)
    print("Status code: " + str(statusCode) + ", Status text: " + rest.ResponseStatusText)
    sys.exit()

print("File successfully uploaded.")