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Expand more on accepting connections

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This commit is contained in:
Andrew Godwin 2017-03-12 21:03:25 -07:00
parent 13c1fcb654
commit cad63451f8
2 changed files with 13 additions and 0 deletions
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2
docs/concepts.rst
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@ -235,6 +235,8 @@ abstraction as a core concept called Groups::
def ws_connect(message): def ws_connect(message):
# Add to reader group # Add to reader group
Group("liveblog").add(message.reply_channel) Group("liveblog").add(message.reply_channel)
# Accept the connection request
message.reply_channel.send({"accept": True})
# Connected to websocket.disconnect # Connected to websocket.disconnect
def ws_disconnect(message): def ws_disconnect(message):

11
docs/getting-started.rst
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@ -165,13 +165,20 @@ disconnect, like this::
# Connected to websocket.connect # Connected to websocket.connect
def ws_add(message): def ws_add(message):
# Accept the incoming connection
message.reply_channel.send({"accept": True}) message.reply_channel.send({"accept": True})
# Add them to the chat group
Group("chat").add(message.reply_channel) Group("chat").add(message.reply_channel)
# Connected to websocket.disconnect # Connected to websocket.disconnect
def ws_disconnect(message): def ws_disconnect(message):
Group("chat").discard(message.reply_channel) Group("chat").discard(message.reply_channel)
.. note::
You need to explicitly accept WebSocket connections if you override connect
by sending ``accept: True`` - you can also reject them at connection time,
before they open, by sending ``close: True``.
Of course, if you've read through :doc:`concepts`, you'll know that channels Of course, if you've read through :doc:`concepts`, you'll know that channels
added to groups expire out if their messages expire (every channel layer has added to groups expire out if their messages expire (every channel layer has
a message expiry time, usually between 30 seconds and a few minutes, and it's a message expiry time, usually between 30 seconds and a few minutes, and it's
@ -204,7 +211,9 @@ get the message. Here's all the code::
# Connected to websocket.connect # Connected to websocket.connect
def ws_add(message): def ws_add(message):
# Accept the connection
message.reply_channel.send({"accept": True}) message.reply_channel.send({"accept": True})
# Add to the chat group
Group("chat").add(message.reply_channel) Group("chat").add(message.reply_channel)
# Connected to websocket.receive # Connected to websocket.receive
@ -559,6 +568,8 @@ consumer above to use a room based on URL rather than username::
def ws_add(message, room): def ws_add(message, room):
# Add them to the right group # Add them to the right group
Group("chat-%s" % room).add(message.reply_channel) Group("chat-%s" % room).add(message.reply_channel)
# Accept the connection request
message.reply_channel.send({"accept": True})
In the next section, we'll change to sending the ``room`` as a part of the In the next section, we'll change to sending the ``room`` as a part of the
WebSocket message - which you might do if you had a multiplexing client - WebSocket message - which you might do if you had a multiplexing client -