Chilkat2-Python

REST Asynchronous Streaming Upload File

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Demonstrates how to asynchronous streaming upload a file to cloud storage. This particular example demonstrates an upload to the Azure Cloud Storage service. The same concepts apply to S3, Google Cloud, and Google Drive. Chilkat2-Python

import sys
import chilkat2

success = False

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

rest = chilkat2.Rest()

# Connect to the Azure Storage Blob Service
bTls = True
port = 443
bAutoReconnect = True
# In this example, the storage account name is "chilkat".
success = rest.Connect("chilkat.blob.core.windows.net",port,bTls,bAutoReconnect)
if (success != True):
    print(rest.LastErrorText)
    sys.exit()

# Provide Azure Cloud credentials for the REST call.
azAuth = chilkat2.AuthAzureStorage()
azAuth.AccessKey = "AZURE_ACCESS_KEY"
# The account name used here should match the 1st part of the domain passed in the call to Connect (above).
azAuth.Account = "chilkat"
azAuth.Scheme = "SharedKey"
azAuth.Service = "Blob"
# This causes the "x-ms-version: 2021-08-06" header to be automatically added.
azAuth.XMsVersion = "2021-08-06"
success = rest.SetAuthAzureStorage(azAuth)

# Set some request headers.
success = rest.AddHeader("x-ms-blob-content-disposition","attachment; filename=\"thisIsATest.txt\"")
success = rest.AddHeader("x-ms-blob-type","BlockBlob")
success = rest.AddHeader("x-ms-meta-m1","v1")
success = rest.AddHeader("x-ms-meta-m2","v2")

# Note: The application does not need to explicitly set the following
# headers: x-ms-date, Authorization, and Content-Length.  These headers
# are automatically set by Chilkat.

sendStream = chilkat2.Stream()

# Define the source data for the stream to be a file.
sendStream.SourceFile = "qa_data/hamlet.xml"

# Create a background thread task to upload from the stream
# The name of the Azure storage container is "test".
# task is a CkTask
task = rest.FullRequestStreamAsync("PUT","/test/thisIsATest.txt",sendStream)

# Start the task. 
success = task.Run()

# In this example, we'll simply sleep and periodically
# check to see if the REST upload if finished.
curPctDone = 0
while task.Finished != True :
    task.SleepMs(100)

# Check to see if the call to FullRequestStream in the background thread pool succeeded.
if (task.TaskSuccess != True):
    # Show what would've been the LastErrorText had FullRequestStream been called synchronously
    print(task.ResultErrorText)

    sys.exit()

responseStatusCode = rest.ResponseStatusCode

# When successful, the Azure Storage service will respond with a 201 response code,
# with an empty body.  Therefore, in the success condition, the responseStr is empty.
if (responseStatusCode == 201):
    print("File uploaded.")
else:
    # It failed, so examine the response body, if one was returned:
    # Given that FullRequestStream returns a string, the return value is obtained via GetResultString.
    responseBodyStr = task.GetResultString()
    print("response body (if any): " + responseBodyStr)

    # Examine the request/response to see what happened.
    print("response status code = " + str(rest.ResponseStatusCode))
    print("response status text = " + rest.ResponseStatusText)
    print("response header: " + rest.ResponseHeader)
    print("---")
    print("LastRequestStartLine: " + rest.LastRequestStartLine)
    print("LastRequestHeader: " + rest.LastRequestHeader)