Streaming in azure function app python

Question

Hi i am using azure function for a solution, in that i need a feature of streaming.

I did looked into https://techcommunity.microsoft.com/t5/azure-compute-blog/azure-functions-support-for-http-streams-in-python-is-now-in/ba-p/4146697 but it seems to be in preview/beta.

Is there any work around to use streaming but by not using any beta library as this needs to be pushed to prod.

Thanks

Answer 1

Hello @Sakib Ali Choudhary

Yes, you are correct that the HTTP streaming feature in Azure Functions for Python is currently in preview. However, there are other ways to achieve streaming in Azure Functions without using the beta library. One way is to use Azure Event Hubs to stream data.

Azure Event Hubs is a highly scalable data streaming platform and event ingestion service, capable of receiving and processing millions of events per second.

You can use Azure Functions to process and analyze the data in real-time as it flows through Event Hubs. Here's an example of how you can use Azure Event Hubs to stream data in Azure Functions for Python:

1. Create an Azure Event Hubs namespace and an event hub within it.
2. In your Azure Function, use the azure-eventhub library to create an Event Hub producer client and send data to the event hub.
3. Use the azure-eventhub library to create an Event Hub consumer client and receive data from the event hub in real-time.

Here's some sample code to get you started:

import os from azure.eventhub
import EventHubProducerClient, EventHubConsumerClient, EventData 

# Send data to Event Hub 
def send_data_to_eventhub(data): 
connection_str = os.environ['EVENT_HUB_CONNECTION_STRING']
eventhub_name = os.environ['EVENT_HUB_NAME']
producer = EventHubProducerClient.from_connection_string(connection_str, eventhub_name=eventhub_name) 

with producer: 
event_data_batch = producer.create_batch()
event_data_batch.add(EventData(data))
producer.send_batch(event_data_batch) 
# Receive data from Event Hub 
def receive_data_from_eventhub(): 
connection_str = os.environ['EVENT_HUB_CONNECTION_STRING'] 
eventhub_name = os.environ['EVENT_HUB_NAME'] 
consumer = EventHubConsumerClient.from_connection_string(connection_str, eventhub_name=eventhub_name) 

with consumer: 
partition_id = "0" e
venthub_partition = consumer.get_partition_properties(partition_id) 
for event in consumer.receive_from_partition(partition_id, starting_position="-1"): 		print(event.body_as_str())

In this example, the send_data_to_eventhub function sends data to the Event Hub, and the receive_data_from_eventhub function receives data from the Event Hub in real-time. You can set the EVENT_HUB_CONNECTION_STRING and EVENT_HUB_NAME environment variables in your Azure Function app

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