(Chilkat2-Python) Azure Service Bus - Send Message to Topic

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Example code showing how to send a message to an Azure Service Bus Topic.

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

# 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.

# Make the initial connection.
# A single REST object, once connected, can be used for many Azure Service Bus REST API calls.
# The auto-reconnect indicates that if the already-established HTTPS connection is closed,
# then it will be automatically re-established as needed.
rest = chilkat2.Rest()
bAutoReconnect = True
success = rest.Connect("<yournamespace>.servicebus.windows.net",443,True,bAutoReconnect)
if (success != True):
    print(rest.LastErrorText)
    sys.exit()

# ----------------------------------------------------------------------------------------------
# The code above this comment could be placed inside a function/subroutine within the application
# because the connection does not need to be made for every request.  Once the connection is made
# the app may send many requests..
# ----------------------------------------------------------------------------------------------

# Let's load a previously computed SAS token and use it.
# See Azure Shared Access Signature for an example to genenerate an Azure SAS token.
sbToken = chilkat2.StringBuilder()
sbToken.LoadFile("qa_data/tokens/serviceBusSas.txt","utf-8")

# Tell the REST object to use the Azure Shared Access Signature for authorization.
sbToken.Prepend("SharedAccessSignature ")
rest.AddHeader("Authorization",sbToken.GetAsString())

# ----------------------------------------------------------------------------------------------

# The code for sending to a topic is identical to the code sending to a queue.
# The only difference is that a topic name (or topic path) is used instead of queue name/path.

# Send to a topic named "gilaMonster";
topicName = "gilaMonster"

# The HTTP request body contains the content of the message sent to the topic.
sbRequestBody = chilkat2.StringBuilder()
sbRequestBody.Append("Hello, I'm a gila monster!")

# Build the path..
sbPath = chilkat2.StringBuilder()
sbPath.Append("/")
sbPath.Append(topicName)
sbPath.Append("/messages")

# Add timeout and api-version query parameters.
rest.AddQueryParam("timeout","20")
rest.AddQueryParam("api-version","2013-08")

# Standard brokered message properties are placed in a BrokerProperties HTTP header. 
# The broker properties must be serialized in JSON format. To specify a TimeToLive value of 3600 seconds 
# and to add a message label "M1" to the message..
json = chilkat2.JsonObject()
json.AppendInt("TimeToLive",3600)
json.AppendString("Label","A123")
rest.AddHeader("BrokerProperties",json.Emit())

# To add custom properties, such as "Priority" and "Color"
rest.AddHeader("Priority","High")
rest.AddHeader("Color","pink")

sbResponseBody = chilkat2.StringBuilder()
success = rest.FullRequestSb("POST",sbPath.GetAsString(),sbRequestBody,sbResponseBody)
if (success != True):
    print(rest.LastErrorText)
    sys.exit()

print("Response Status Code = " + str(rest.ResponseStatusCode))

# Check for a success response.
if (rest.ResponseStatusCode != 201):
    print(rest.LastRequestStartLine)
    print(rest.LastRequestHeader)
    print(sbResponseBody.GetAsString())
    print("Failed.")
    sys.exit()

# If successful, the 201 response will have no response body.

print("Success.")