websocket是否发送和接收完整消息？

Question

I am new to web development and I am trying to write a simple web game using python and django for my server with some javascript for the front end graphics. I am using the channels package to use websockets for the communication and I have a little question about websockets.

In python, I know that when we use sockets, the message isn't guaranteed to be sent fully. For example, if I use socket.send in python, I may not send the entire message and in that case I need to resend what is left, and on the receiving side, I am not guaranteed to get the full message using socket.recv (assuming the bufsize argument is big enough for the full message), so I have to keep calling recv until I get the entire message.

My question is: Is it the same with websockets or not?

I tried looking for this in the MDN docummentation and in google, but I couldn't find any information on this. In addition, every example I have seen online didn't take this into account, so it seems like what I send with socket.send (in javascript) is exactly what I get on the other end and vice versa.

Is it true? Can I assume that the message I send with socket.send on the client side will be received fully in one event on the server side (which in my case is a websocket consumer ) and the other way around: if the server sends a message to the client, will it be received fully in one Message event on the client side in javascript?

Thanks in advance.

Answer 1

You can assume that the message will be received if the client is connected. And visa versa, that the server will receive the message it is listening.

Django Channel's are reliably unreliable.

Calling receive on these channels does not guarantee that you will get the messages in order or that you will get anything if the channel is non-empty.

https://channels.readthedocs.io/en/latest/channel_layer_spec.html#channel-semantics