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Andrés Baamonde Lozano
Andrés Baamonde Lozano

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SignalR core python client (VI): Client to server streamming 3.X

#signalrcore #python #client #signalr

Intro

Thistutorial is aligned with microsoft docs tutorial written in Javascript + C#

Server signalr

In your Hub class you only need to add the method for upload items

public async Task UploadStream(ChannelReader<string> stream) { while (await stream.WaitToReadAsync()) { while (stream.TryRead(out var item)) { // do something with the stream item Console.WriteLine(item); } } }
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Python client

I tried to make python client similar to Javascript client. With a similar syntax and behaiviour the librarie´s learning curve will be lower for people who has read the tutorials and worked with signalr in javascript previously.

Create hub connection 

from signalrcore.hub_connection_builder import HubConnectionBuilder hub_connection = HubConnectionBuilder()\ .with_url(server_url, options={"verify_ssl": False}) \ .configure_logging(logging.DEBUG) \ .with_automatic_reconnect({ "type": "interval", "keep_alive_interval": 10, "intervals": [1, 3, 5, 6, 7, 87, 3] })\ .build() hub_connection.start()
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Import and create subject 

from signalrcore.subject import Subject subject = Subject()
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Manage stream 

myCoolStreamItem = "some content" # start Stream hub_connection.send("UploadStream", subject) # call next any time you need to upload a item subject.next(myCoolStreamItem) # stop stream subject.complete()
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Links

Github
Pypi

Thank you for reading, and write any thought below :D

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