def _get_router_path(scope: Scope) -> Optional[str]:
"""Returns the original router path (with url param names) for given request."""
if not (scope.get("endpoint", None) and scope.get("router", None)):
return None
base_scope = {
"type": scope.get("type"),
"path": scope.get("root_path", "") + scope.get("path"),
"path_params": scope.get("path_params", {}),
"method": scope.get("method"),
}
try:
path = get_matching_route_path(base_scope,
scope.get("router").routes)
return path
except:
# unhandled path
pass
return None
def matches(self, scope: Scope) -> typing.Tuple[Match, Scope]:
if scope["type"] == "http":
match = self.path_regex.match(scope["path"])
if match:
matched_params = match.groupdict()
for key, value in matched_params.items():
matched_params[key] = self.param_convertors[key].convert(
value)
path_params = dict(scope.get("path_params", {}))
path_params.update(matched_params)
child_scope = {
"endpoint": self.endpoint,
"path_params": path_params
}
if self.methods and scope["method"] not in self.methods:
return Match.PARTIAL, child_scope
else:
return Match.FULL, child_scope
return Match.NONE, {}
async def _app(scope: Scope, receive: Receive, send: Send) -> None:
app = scope["app"]
route, route_scope = app.router.get_route_from_scope(scope)
state = {
"scope": scope,
"receive": receive,
"send": send,
"exc": None,
"app": app,
"path_params": route_scope["path_params"],
"route": route,
"websocket": websockets.WebSocket(scope, receive, send),
}
injected_func = await app.injector.inject(endpoint, state)
kwargs = scope.get("kwargs", {})
await injected_func(**kwargs)
async def lifespan(self, scope: Scope, receive: Receive, send: Send) -> None:
"""
Handle ASGI lifespan messages, which allows us to manage application
startup and shutdown events.
"""
started = False
app = scope.get("app")
await receive()
try:
async with self.lifespan_context(app):
await send({"type": "lifespan.startup.complete"})
started = True
await receive()
except BaseException:
exc_text = traceback.format_exc()
if started:
await send({"type": "lifespan.shutdown.failed", "message": exc_text})
else:
await send({"type": "lifespan.startup.failed", "message": exc_text})
raise
else:
await send({"type": "lifespan.shutdown.complete"})
async def app(self, scope: Scope, receive: Receive, send: Send) -> None:
if scope["type"] in ("http", "websocket"):
path = scope["path"]
root_path = scope.get("root_path", "")
# Call into a submounted app, if one exists.
for path_prefix, app in self.mount_apps.items():
if not path.startswith(path_prefix + "/"):
continue
if isinstance(app, WSGIMiddleware):
if scope["type"] != "http":
continue
subscope = copy.deepcopy(scope)
subscope["path"] = path[len(path_prefix):]
subscope["root_path"] = root_path + path_prefix
await app(subscope, receive, send)
return
await self.indexfile(scope, receive, send)
elif scope["type"] == "lifespan":
await self.lifespan(scope, receive, send)
def __init__(self, url: str = "", scope: Scope = None) -> None:
if scope is not None:
assert not url, 'Cannot set both "url" and "scope".'
scheme = scope["scheme"]
host, port = scope["server"]
path = scope.get("root_path", "") + scope["path"]
query_string = scope["query_string"]
default_port = {
"http": 80,
"https": 443,
"ws": 80,
"wss": 443
}[scheme]
if port == default_port:
url = "%s://%s%s" % (scheme, host, path)
else:
url = "%s://%s:%s%s" % (scheme, host, port, path)
if query_string:
url += "?" + unquote(query_string.decode())
self._url = url
async def __call__(self, scope: Scope, receive: Receive, send: Send):
self._set_cookies_to_headers()
if self.streaming:
self._starlette_resp = StreamingResponse
self._body = self.streaming
elif self._json is not None:
self._starlette_resp = JSONResponse
self._body = self.json
self.headers["content-type"] = "application/json"
elif self._redirect_to is not None:
url, qs = self._redirect_to
if qs is None:
qs = scope.get("query_string", b"").decode("ascii")
if qs:
qs = f"?{qs}"
self._body = url + qs
app = self._starlette_resp(self._body,
status_code=self.status_code,
headers=self.headers)
return await app(scope, receive, send)
def prepare_fhir_scopes(
scope: Scope,
headers: Headers,
params: QueryParams,
errors: typing.List[typing.Any],
):
# Generate Request ID
scope["FHIR_REQUEST_ID"] = uuid.uuid4()
# 1. Prepare Accept & FHIR Version
# --------------------------------
accept = headers.get("accept", None)
if accept:
parts = accept.split(";")
accept = parts[0].strip()
if accept in ("application/json", "text/json"):
accept = "application/fhir+json"
if accept in ALLOWED_ACCEPTS:
scope["FHIR_RESPONSE_ACCEPT"] = accept
else:
errors.append({
"loc": "Header.Accept",
"msg": f"Accept mime '{accept}' is not supported.",
"original": headers.get("accept"),
})
if len(parts) > 1:
version_str = None
try:
name, version_str = parts[1].strip().split("=")
if name == "fhirVersion":
version = MIME_FHIR_VERSION_MAP[version_str]
scope["FHIR_VERSION"] = version
scope["FHIR_VERSION_ORIGINAL"] = version_str
else:
errors.append({
"loc": "Header.Accept",
"msg":
"Invalid format of FHIR Version is provided in mime",
"original": headers.get("accept"),
})
except KeyError:
errors.append({
"loc": "Header.Accept",
"msg":
f"Unsupported FHIR Version '{version_str}' is provided in mime",
"original": headers.get("accept"),
})
except ValueError:
errors.append({
"loc": "Header.Accept",
"msg":
"Invalid format of FHIR Version is provided in mime",
"original": headers.get("accept"),
})
else:
scope["FHIR_RESPONSE_ACCEPT"] = "application/fhir+json"
if (scope.get("FHIR_VERSION_ORIGINAL", None) is None
and scope.get("FHIR_VERSION", None) is None):
scope["FHIR_VERSION"] = MIME_FHIR_VERSION_MAP[DEFAULT_FHIR_VERSION]
# 2. Check Query String
# ---------------------
format_mime = params.get("_format", None)
if format_mime is not None:
if format_mime in ALLOWED_ACCEPTS:
scope["FHIR_RESPONSE_FORMAT"] = format_mime
else:
errors.append({
"loc": "QueryString._format",
"msg": f"Format mime '{format_mime}' is not supported.",
"original": format_mime,
})
pretty_response = params.get("_pretty", None)
if pretty_response is not None:
if pretty_response in ("true", "false"):
scope["FHIR_RESPONSE_PRETTY"] = pretty_response == "true"
else:
errors.append({
"loc": "QueryString._pretty",
"msg":
f"Invalid ``_pretty`` value '{pretty_response}' is provided.",
"original": pretty_response,
})
# 3. Prepare Conditional Headers
# ------------------------------
if headers.get("If-None-Exist"):
scope["FHIR_CONDITION_NONE_EXIST"] = [
tuple(
map(lambda x: x.strip(),
headers.get("If-None-Exist").split("=")))
]
if headers.get("If-Modified-Since"):
try:
scope["FHIR_CONDITION_MODIFIED_SINCE"] = parsedate_to_datetime(
headers.get("If-Modified-Since"))
except ValueError:
errors.append({
"loc": "Header.If-Modified-Since",
"msg": "Invalid formatted datetime value is provided.",
"original": headers.get("If-Modified-Since"),
})
if headers.get("If-None-Match"):
try:
scope["FHIR_CONDITION_NONE_MATCH"] = literal_eval(
headers.get("If-None-Match").replace("W/", ""))
except (SyntaxError, ValueError):
errors.append({
"loc": "Header.If-None-Match",
"msg": "Invalid formatted ETag value is provided.",
"original": headers.get("If-None-Match"),
})
if headers.get("If-Match"):
try:
scope["FHIR_CONDITION_MATCH"] = literal_eval(
headers.get("If-Match").replace("W/", ""))
except (SyntaxError, ValueError):
errors.append({
"loc": "Header.If-Match",
"msg": "Invalid formatted ETag value is provided.",
"original": headers.get("If-Match"),
})
async def _dispatch(self, scope: Scope, receive: Receive,
send: Send) -> None:
# check request type
if scope["type"] == "lifespan":
while True:
message = await receive()
if message["type"] == "lifespan.startup":
try:
await self._startup()
except Exception as e:
await send({
"type": "lifespan.startup.failed",
"message": str(e)
})
else:
await send({"type": "lifespan.startup.complete"})
elif message["type"] == "lifespan.shutdown":
try:
await self._shutdown()
except Exception as e:
await send({
"type": "lifespan.shutdown.failed",
"message": str(e)
})
else:
await send({"type": "lifespan.shutdown.complete"})
return
# check `/favicon.ico`.
if self.favicon and scope["path"] == "/favicon.ico":
scope["path"] = self.favicon
# check mounted app.
normalized = normalize_path(scope["path"])
for prefix, app in self.mounted_app.items():
if normalized.startswith(prefix):
scope["path"] = scope["path"].replace(prefix[:-1], "", 1)
root = scope.get("root_path", "") + prefix
scope["root_path"] = root.replace("//", "/")
if scope["type"] == "http":
model = {
"req": models.http.Request(scope, receive, send),
"resp": models.http.Response(),
}
elif scope["type"] == "websocket":
model = {
"conn":
models.websocket.Connection(scope, receive, send)
}
else:
raise TypeError(f"`{scope['type']}` is not supported.")
scope["extensions"] = scope.get("extensions", {})
scope["extensions"].update({"spangle": dict(**model)})
await app(scope, receive, send)
return
# check spangle views.
if scope["type"] == "http":
app = await dispatch_http(scope, receive, send)
t = asyncio.create_task(app(scope, receive, send))
elif scope["type"] == "websocket":
app = await dispatch_websocket(scope, receive, send)
t = asyncio.create_task(app(scope, receive, send))
else:
raise ValueError("Invalid scheme.")
await t
