unit-legacy/src/python/nxt_python_asgi_lifespan.c at master · freeunitdev/unit-legacy · GitHub

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* Copyright (C) NGINX, Inc.

#include <python/nxt_python.h>

#if (NXT_HAVE_ASGI)

#include <nxt_main.h>

#include <python/nxt_python_asgi.h>

#include <python/nxt_python_asgi_str.h>

#include <structmember.h>

typedef struct {

PyObject_HEAD

nxt_py_asgi_ctx_data_t *ctx_data;

int disabled;

int startup_received;

int startup_sent;

int shutdown_received;

int shutdown_sent;

int shutdown_called;

PyObject *startup_future;

PyObject *shutdown_future;

PyObject *receive_future;

PyObject *state;

} nxt_py_asgi_lifespan_t;

static PyObject *nxt_py_asgi_lifespan_target_startup(

nxt_py_asgi_ctx_data_t *ctx_data, nxt_python_target_t *target);

static int nxt_py_asgi_lifespan_target_shutdown(

nxt_py_asgi_lifespan_t *lifespan);

static PyObject *nxt_py_asgi_lifespan_receive(PyObject *self, PyObject *none);

static PyObject *nxt_py_asgi_lifespan_send(PyObject *self, PyObject *dict);

static PyObject *nxt_py_asgi_lifespan_send_startup(

nxt_py_asgi_lifespan_t *lifespan, int v, PyObject *dict);

static PyObject *nxt_py_asgi_lifespan_send_(nxt_py_asgi_lifespan_t *lifespan,

int v, int *sent, PyObject **future);

static PyObject *nxt_py_asgi_lifespan_send_shutdown(

nxt_py_asgi_lifespan_t *lifespan, int v, PyObject *dict);

static PyObject *nxt_py_asgi_lifespan_disable(nxt_py_asgi_lifespan_t *lifespan);

static PyObject *nxt_py_asgi_lifespan_done(PyObject *self, PyObject *future);

static void nxt_py_asgi_lifespan_dealloc(PyObject *self);

static PyMethodDef nxt_py_asgi_lifespan_methods[] = {

{ "receive", nxt_py_asgi_lifespan_receive, METH_NOARGS, NULL },

{ "send", nxt_py_asgi_lifespan_send, METH_O, NULL },

{ "_done", nxt_py_asgi_lifespan_done, METH_O, NULL },

{}

};

static PyMemberDef nxt_py_asgi_lifespan_members[] = {

{

#if PY_VERSION_HEX >= NXT_PYTHON_VER(3, 7)

.name = "state",

#else

.name = (char *)"state",

#endif

.type = T_OBJECT_EX,

.offset = offsetof(nxt_py_asgi_lifespan_t, state),

.flags = READONLY,

#if PY_VERSION_HEX >= NXT_PYTHON_VER(3, 7)

.doc = PyDoc_STR("lifespan.state")

#else

.doc = (char *)PyDoc_STR("lifespan.state")

#endif

{ NULL, 0, 0, 0, NULL }

};

static PyAsyncMethods nxt_py_asgi_async_methods = {

.am_await = nxt_py_asgi_await,

};

static PyTypeObject nxt_py_asgi_lifespan_type = {

PyVarObject_HEAD_INIT(NULL, 0)

.tp_name = "unit._asgi_lifespan",

.tp_basicsize = sizeof(nxt_py_asgi_lifespan_t),

.tp_dealloc = nxt_py_asgi_lifespan_dealloc,

.tp_as_async = &nxt_py_asgi_async_methods,

.tp_flags = Py_TPFLAGS_DEFAULT,

.tp_doc = "unit ASGI Lifespan object",

.tp_iter = nxt_py_asgi_iter,

.tp_iternext = nxt_py_asgi_next,

.tp_methods = nxt_py_asgi_lifespan_methods,

.tp_members = nxt_py_asgi_lifespan_members,

};

int

nxt_py_asgi_lifespan_startup(nxt_py_asgi_ctx_data_t *ctx_data)

{

size_t size;

PyObject *lifespan;

PyObject **target_lifespans;

nxt_int_t i;

nxt_python_target_t *target;

size = nxt_py_targets->count * sizeof(PyObject*);

target_lifespans = nxt_unit_malloc(NULL, size);

if (nxt_slow_path(target_lifespans == NULL)) {

nxt_unit_alert(NULL, "Failed to allocate lifespan data");

return NXT_UNIT_ERROR;

}

memset(target_lifespans, 0, size);

for (i = 0; i < nxt_py_targets->count; i++) {

target = &nxt_py_targets->target[i];

lifespan = nxt_py_asgi_lifespan_target_startup(ctx_data, target);

if (nxt_slow_path(lifespan == NULL)) {

return NXT_UNIT_ERROR;

}

target_lifespans[i] = lifespan;

}

ctx_data->target_lifespans = target_lifespans;

return NXT_UNIT_OK;

}

static PyObject *

nxt_py_asgi_lifespan_target_startup(nxt_py_asgi_ctx_data_t *ctx_data,

nxt_python_target_t *target)

{

PyObject *scope, *res, *py_task, *receive, *send, *done;

PyObject *stage2;

nxt_py_asgi_lifespan_t *lifespan, *ret;

if (nxt_slow_path(PyType_Ready(&nxt_py_asgi_lifespan_type) != 0)) {

nxt_unit_alert(NULL,

"Python failed to initialize the 'asgi_lifespan' type object");

return NULL;

}

lifespan = PyObject_New(nxt_py_asgi_lifespan_t, &nxt_py_asgi_lifespan_type);

if (nxt_slow_path(lifespan == NULL)) {

nxt_unit_alert(NULL, "Python failed to create lifespan object");

return NULL;

}

ret = NULL;

receive = PyObject_GetAttrString((PyObject *) lifespan, "receive");

if (nxt_slow_path(receive == NULL)) {

nxt_unit_alert(NULL, "Python failed to get 'receive' method");

goto release_lifespan;

}

send = PyObject_GetAttrString((PyObject *) lifespan, "send");

if (nxt_slow_path(receive == NULL)) {

nxt_unit_alert(NULL, "Python failed to get 'send' method");

goto release_receive;

}

done = PyObject_GetAttrString((PyObject *) lifespan, "_done");

if (nxt_slow_path(receive == NULL)) {

nxt_unit_alert(NULL, "Python failed to get '_done' method");

goto release_send;

}

lifespan->startup_future = PyObject_CallObject(ctx_data->loop_create_future,

NULL);

if (nxt_slow_path(lifespan->startup_future == NULL)) {

nxt_unit_alert(NULL, "Python failed to create Future object");

nxt_python_print_exception();

goto release_done;

}

lifespan->ctx_data = ctx_data;

lifespan->disabled = 0;

lifespan->startup_received = 0;

lifespan->startup_sent = 0;

lifespan->shutdown_received = 0;

lifespan->shutdown_sent = 0;

lifespan->shutdown_called = 0;

lifespan->shutdown_future = NULL;

lifespan->receive_future = NULL;

lifespan->state = NULL;

scope = nxt_py_asgi_new_scope(NULL, nxt_py_lifespan_str, nxt_py_2_0_str);

if (nxt_slow_path(scope == NULL)) {

goto release_future;

}

lifespan->state = PyDict_New();

if (nxt_slow_path(lifespan->state == NULL)) {

nxt_unit_req_error(NULL,

"Python failed to create 'state' dict");

goto release_future;

}

if (nxt_slow_path(PyDict_SetItem(scope, nxt_py_state_str,

lifespan->state) == -1))

{

nxt_unit_req_error(NULL,

"Python failed to set 'scope.state' item");

Py_CLEAR(lifespan->state);

goto release_future;

}

if (!target->asgi_legacy) {

nxt_unit_req_debug(NULL, "Python call ASGI 3.0 application");

res = PyObject_CallFunctionObjArgs(target->application,

scope, receive, send, NULL);

} else {

nxt_unit_req_debug(NULL, "Python call legacy application");

res = PyObject_CallFunctionObjArgs(target->application, scope, NULL);

if (nxt_slow_path(res == NULL)) {

nxt_unit_log(NULL, NXT_UNIT_LOG_INFO,

"ASGI Lifespan processing exception");

nxt_python_print_exception();

lifespan->disabled = 1;

Py_INCREF(lifespan);

ret = lifespan;

goto release_scope;

}

if (nxt_slow_path(PyCallable_Check(res) == 0)) {

nxt_unit_req_error(NULL,

"Legacy ASGI application returns not a callable");

Py_DECREF(res);

goto release_scope;

}

stage2 = res;

res = PyObject_CallFunctionObjArgs(stage2, receive, send, NULL);

Py_DECREF(stage2);

}

if (nxt_slow_path(res == NULL)) {

nxt_unit_error(NULL, "Python failed to call the application");

nxt_python_print_exception();

goto release_scope;

}

if (nxt_slow_path(!PyCoro_CheckExact(res))) {

nxt_unit_error(NULL, "Application result type is not a coroutine");

Py_DECREF(res);

goto release_scope;

}

py_task = PyObject_CallFunctionObjArgs(ctx_data->loop_create_task, res,

NULL);

if (nxt_slow_path(py_task == NULL)) {

nxt_unit_alert(NULL, "Python failed to call the create_task");

nxt_python_print_exception();

Py_DECREF(res);

goto release_scope;

}

Py_DECREF(res);

res = PyObject_CallMethodObjArgs(py_task, nxt_py_add_done_callback_str,

done, NULL);

if (nxt_slow_path(res == NULL)) {

nxt_unit_alert(NULL, "Python failed to call 'task.add_done_callback'");

nxt_python_print_exception();

goto release_task;

}

Py_DECREF(res);

res = PyObject_CallFunctionObjArgs(ctx_data->loop_run_until_complete,

lifespan->startup_future, NULL);

if (nxt_slow_path(res == NULL)) {

nxt_unit_alert(NULL, "Python failed to call loop.run_until_complete");

nxt_python_print_exception();

goto release_task;

}

Py_DECREF(res);

if (lifespan->startup_sent == 1 || lifespan->disabled) {

Py_INCREF(lifespan);

ret = lifespan;

}

release_task:

Py_DECREF(py_task);

release_scope:

Py_DECREF(scope);

release_future:

Py_CLEAR(lifespan->startup_future);

release_done:

Py_DECREF(done);

release_send:

Py_DECREF(send);

release_receive:

Py_DECREF(receive);

release_lifespan:

Py_DECREF(lifespan);

return (PyObject *) ret;

}

int

nxt_py_asgi_lifespan_shutdown(nxt_unit_ctx_t *ctx)

{

nxt_int_t i, ret;

nxt_py_asgi_lifespan_t *lifespan;

nxt_py_asgi_ctx_data_t *ctx_data;

ctx_data = ctx->data;

for (i = 0; i < nxt_py_targets->count; i++) {

lifespan = (nxt_py_asgi_lifespan_t *)ctx_data->target_lifespans[i];

ret = nxt_py_asgi_lifespan_target_shutdown(lifespan);

if (nxt_slow_path(ret != NXT_UNIT_OK)) {

return NXT_UNIT_ERROR;

}

nxt_unit_free(NULL, ctx_data->target_lifespans);

return NXT_UNIT_OK;

}

static int

nxt_py_asgi_lifespan_target_shutdown(nxt_py_asgi_lifespan_t *lifespan)

{

PyObject *msg, *future, *res;

nxt_py_asgi_ctx_data_t *ctx_data;

ctx_data = lifespan->ctx_data;

if (nxt_slow_path(lifespan == NULL || lifespan->disabled)) {

return NXT_UNIT_OK;

}

lifespan->shutdown_called = 1;

if (lifespan->receive_future != NULL) {

future = lifespan->receive_future;

lifespan->receive_future = NULL;

msg = nxt_py_asgi_new_msg(NULL, nxt_py_lifespan_shutdown_str);

if (nxt_fast_path(msg != NULL)) {

res = PyObject_CallMethodObjArgs(future, nxt_py_set_result_str,

msg, NULL);

Py_XDECREF(res);

Py_DECREF(msg);

}

Py_DECREF(future);

}

if (lifespan->shutdown_sent) {

return NXT_UNIT_OK;

}

lifespan->shutdown_future = PyObject_CallObject(ctx_data->loop_create_future,

NULL);

if (nxt_slow_path(lifespan->shutdown_future == NULL)) {

nxt_unit_alert(NULL, "Python failed to create Future object");

nxt_python_print_exception();

return NXT_UNIT_ERROR;

}

res = PyObject_CallFunctionObjArgs(ctx_data->loop_run_until_complete,

lifespan->shutdown_future, NULL);

if (nxt_slow_path(res == NULL)) {

nxt_unit_alert(NULL, "Python failed to call loop.run_until_complete");

nxt_python_print_exception();

return NXT_UNIT_ERROR;

}

Py_DECREF(res);

Py_CLEAR(lifespan->shutdown_future);

return NXT_UNIT_OK;

}

static PyObject *

nxt_py_asgi_lifespan_receive(PyObject *self, PyObject *none)

{

PyObject *msg, *future;

nxt_py_asgi_lifespan_t *lifespan;

nxt_py_asgi_ctx_data_t *ctx_data;

lifespan = (nxt_py_asgi_lifespan_t *) self;

ctx_data = lifespan->ctx_data;

nxt_unit_debug(NULL, "asgi_lifespan_receive");

future = PyObject_CallObject(ctx_data->loop_create_future, NULL);

if (nxt_slow_path(future == NULL)) {

nxt_unit_alert(NULL, "Python failed to create Future object");

nxt_python_print_exception();

return PyErr_Format(PyExc_RuntimeError,

"failed to create Future object");

}

if (!lifespan->startup_received) {

lifespan->startup_received = 1;

msg = nxt_py_asgi_new_msg(NULL, nxt_py_lifespan_startup_str);

return nxt_py_asgi_set_result_soon(NULL, ctx_data, future, msg);

}

if (lifespan->shutdown_called && !lifespan->shutdown_received) {

lifespan->shutdown_received = 1;

msg = nxt_py_asgi_new_msg(NULL, nxt_py_lifespan_shutdown_str);

return nxt_py_asgi_set_result_soon(NULL, ctx_data, future, msg);

}

Py_INCREF(future);

lifespan->receive_future = future;

return future;

}

static PyObject *

nxt_py_asgi_lifespan_send(PyObject *self, PyObject *dict)

{

PyObject *type, *msg;

const char *type_str;

Py_ssize_t type_len;

nxt_py_asgi_lifespan_t *lifespan;

static const nxt_str_t startup_complete

= nxt_string("lifespan.startup.complete");

static const nxt_str_t startup_failed

= nxt_string("lifespan.startup.failed");

static const nxt_str_t shutdown_complete

= nxt_string("lifespan.shutdown.complete");

static const nxt_str_t shutdown_failed

= nxt_string("lifespan.shutdown.failed");

lifespan = (nxt_py_asgi_lifespan_t *) self;

type = PyDict_GetItem(dict, nxt_py_type_str);

if (nxt_slow_path(type == NULL || !PyUnicode_Check(type))) {

nxt_unit_error(NULL,

"asgi_lifespan_send: 'type' is not a unicode string");

return PyErr_Format(PyExc_TypeError,

"'type' is not a unicode string");

}

type_str = PyUnicode_AsUTF8AndSize(type, &type_len);

nxt_unit_debug(NULL, "asgi_lifespan_send type is '%.*s'",

(int) type_len, type_str);

if (type_len == (Py_ssize_t) startup_complete.length

&& memcmp(type_str, startup_complete.start, type_len) == 0)

{

return nxt_py_asgi_lifespan_send_startup(lifespan, 0, NULL);

}

if (type_len == (Py_ssize_t) startup_failed.length

&& memcmp(type_str, startup_failed.start, type_len) == 0)

{

msg = PyDict_GetItem(dict, nxt_py_message_str);

return nxt_py_asgi_lifespan_send_startup(lifespan, 1, msg);

}

if (type_len == (Py_ssize_t) shutdown_complete.length

&& memcmp(type_str, shutdown_complete.start, type_len) == 0)

{

return nxt_py_asgi_lifespan_send_shutdown(lifespan, 0, NULL);

}

if (type_len == (Py_ssize_t) shutdown_failed.length

&& memcmp(type_str, shutdown_failed.start, type_len) == 0)

{

msg = PyDict_GetItem(dict, nxt_py_message_str);

return nxt_py_asgi_lifespan_send_shutdown(lifespan, 1, msg);

}

return nxt_py_asgi_lifespan_disable(lifespan);

}

static PyObject *

nxt_py_asgi_lifespan_send_startup(nxt_py_asgi_lifespan_t *lifespan, int v,

PyObject *message)

{

const char *message_str;

Py_ssize_t message_len;

if (nxt_slow_path(v != 0)) {

nxt_unit_error(NULL, "Application startup failed");

if (nxt_fast_path(message != NULL && PyUnicode_Check(message))) {

message_str = PyUnicode_AsUTF8AndSize(message, &message_len);

nxt_unit_error(NULL, "%.*s", (int) message_len, message_str);

}

return nxt_py_asgi_lifespan_send_(lifespan, v,

&lifespan->startup_sent,

&lifespan->startup_future);

}

static PyObject *

nxt_py_asgi_lifespan_send_(nxt_py_asgi_lifespan_t *lifespan, int v, int *sent,

PyObject **pfuture)

{

PyObject *future, *res;

if (*sent) {

return nxt_py_asgi_lifespan_disable(lifespan);

}

*sent = 1 + v;

if (*pfuture != NULL) {

future = *pfuture;

*pfuture = NULL;

res = PyObject_CallMethodObjArgs(future, nxt_py_set_result_str,

Py_None, NULL);

if (nxt_slow_path(res == NULL)) {

nxt_unit_alert(NULL, "Failed to call 'future.set_result'");

nxt_python_print_exception();

return nxt_py_asgi_lifespan_disable(lifespan);

}

Py_DECREF(res);

Py_DECREF(future);

}

Py_INCREF(lifespan);

return (PyObject *) lifespan;

}

static PyObject *

nxt_py_asgi_lifespan_disable(nxt_py_asgi_lifespan_t *lifespan)

{

nxt_unit_warn(NULL, "Got invalid state transition on lifespan protocol");

lifespan->disabled = 1;

return PyErr_Format(PyExc_AssertionError,

"Got invalid state transition on lifespan protocol");

}

static PyObject *

nxt_py_asgi_lifespan_send_shutdown(nxt_py_asgi_lifespan_t *lifespan, int v,

PyObject *message)

{

return nxt_py_asgi_lifespan_send_(lifespan, v,

&lifespan->shutdown_sent,

&lifespan->shutdown_future);

}

static PyObject *

nxt_py_asgi_lifespan_done(PyObject *self, PyObject *future)

{

PyObject *res;

nxt_py_asgi_lifespan_t *lifespan;

nxt_unit_debug(NULL, "asgi_lifespan_done");

lifespan = (nxt_py_asgi_lifespan_t *) self;

if (lifespan->startup_sent == 0) {

lifespan->disabled = 1;

}

* Get Future.result() and it raises an exception, if coroutine exited

* with exception.

res = PyObject_CallMethodObjArgs(future, nxt_py_result_str, NULL);

if (nxt_slow_path(res == NULL)) {

nxt_unit_log(NULL, NXT_UNIT_LOG_INFO,

"ASGI Lifespan processing exception");

nxt_python_print_exception();

}

Py_XDECREF(res);

if (lifespan->startup_future != NULL) {

future = lifespan->startup_future;

lifespan->startup_future = NULL;

res = PyObject_CallMethodObjArgs(future, nxt_py_set_result_str,

Py_None, NULL);

if (nxt_slow_path(res == NULL)) {

nxt_unit_alert(NULL, "Failed to call 'future.set_result'");

nxt_python_print_exception();

}

Py_XDECREF(res);

Py_DECREF(future);

}

if (lifespan->shutdown_future != NULL) {

future = lifespan->shutdown_future;

lifespan->shutdown_future = NULL;

res = PyObject_CallMethodObjArgs(future, nxt_py_set_result_str,

Py_None, NULL);

if (nxt_slow_path(res == NULL)) {

nxt_unit_alert(NULL, "Failed to call 'future.set_result'");

nxt_python_print_exception();

}

Py_XDECREF(res);

Py_DECREF(future);

}

Py_RETURN_NONE;

}

static void

nxt_py_asgi_lifespan_dealloc(PyObject *self)

{

nxt_py_asgi_lifespan_t *lifespan = (nxt_py_asgi_lifespan_t *)self;

Py_CLEAR(lifespan->state);

PyObject_Del(self);

}

#endif /* NXT_HAVE_ASGI */

unit-legacy/src/python/nxt_python_asgi_lifespan.c at master · freeunitdev/unit-legacy · GitHub

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