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MUST is preferable to SHOULD

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Cory Benfield 2016-03-10 09:15:32 +00:00
parent a2d64f9335
commit ce0433f438
1 changed files with 8 additions and 8 deletions
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docs/asgi.rst
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@ -104,9 +104,9 @@ and underscores (``_``), plus an optional prefix character (see below).
Channels are a first-in, first out queue with at-most-once delivery
semantics. They can have multiple writers and multiple readers; only a single
reader should get each written message. Implementations should never
deliver a message more than once or to more than one reader, and should
drop messages if this is necessary to achieve this restriction.
reader should get each written message. Implementations must never deliver
a message more than once or to more than one reader, and must drop messages if
this is necessary to achieve this restriction.
In order to aid with scaling and network architecture, a distinction
is made between channels that have multiple readers (such as the
@ -259,7 +259,7 @@ receive messages in channel order.
Specification Details
=====================
A *channel layer* should provide an object with these attributes
A *channel layer* must provide an object with these attributes
(all function arguments are positional):
* ``send(channel, message)``, a callable that takes two arguments; the
@ -408,10 +408,10 @@ different requests on the same connection different reply channels, and
correctly multiplex the responses back into the same stream as they come in.
The HTTP version is available as a string in the request message.
HTTP/2 Server Push responses are included, but should be sent prior to the
main response, and you should check for ``http_version = 2`` before sending
them; if a protocol server or connection incapable of Server Push receives
these, it should simply drop them.
HTTP/2 Server Push responses are included, but must be sent prior to the
main response, and applications must check for ``http_version = 2`` before
sending them; if a protocol server or connection incapable of Server Push
receives these, it must drop them.
The HTTP specs are somewhat vague on the subject of multiple headers;
RFC7230 explicitly says they must be merge-able with commas, while RFC6265