Python: Add ASGI lifespan state support.

Lifespan state is a special dict in asgi lifespan scope, which allow
applications to persist data from the lifespan cycle to request/response
handling. The scope["state"] namespace provides a place to store these
sorts of things. The server will ensure that a shallow copy of the
namespace is passed into each subsequent request/response call into the
application.

Some frameworks are already taking advantage of this feature, for
example, starlette, and without this feature they wouldn't work
properly.

Signed-off-by: synodriver <diguohuangjiajinweijun@gmail.com>
Reviewed-by: Andrew Clayton <a.clayton@nginx.com>
[ Minor code tweaks to avoid lines > 80 chars, static a function and
  re-work the PyMemberDef structure initialisation for Python <3.7
  and -Wwrite-strings compatibility - Andrew ]
Tested-by: <https://github.com/synodriver>
Tested-by: <https://github.com/hawiliali>
Closes: <https://github.com/nginx/unit/issues/864>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/python/nxt_python_asgi_str.c b/src/python/nxt_python_asgi_str.c
index 7171d52b..3bea87d5 100644
--- a/src/python/nxt_python_asgi_str.c
+++ b/src/python/nxt_python_asgi_str.c
@@ -55,6 +55,7 @@ PyObject  *nxt_py_subprotocol_str;
 PyObject  *nxt_py_subprotocols_str;
 PyObject  *nxt_py_text_str;
 PyObject  *nxt_py_type_str;
+PyObject  *nxt_py_state_str;
 PyObject  *nxt_py_version_str;
 PyObject  *nxt_py_websocket_str;
 PyObject  *nxt_py_websocket_accept_str;
@@ -110,6 +111,7 @@ static nxt_python_string_t nxt_py_asgi_strings[] = {
     { nxt_string("subprotocols"), &nxt_py_subprotocols_str },
     { nxt_string("text"), &nxt_py_text_str },
     { nxt_string("type"), &nxt_py_type_str },
+    { nxt_string("state"), &nxt_py_state_str },
     { nxt_string("version"), &nxt_py_version_str },
     { nxt_string("websocket"), &nxt_py_websocket_str },
     { nxt_string("websocket.accept"), &nxt_py_websocket_accept_str },