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Python: pre-creation of objects for string constants.

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This is an optimization to avoid creating them at runtime on each request.
This commit is contained in:
Valentin Bartenev
2019-12-23 21:14:14 +03:00
parent 68a2292372
commit 51af6ac0a1
1 changed files with 157 additions and 39 deletions
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194
src/nxt_python_wsgi.c
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@@ -50,6 +50,8 @@
#define PyBytes_Check PyString_Check
#define PyBytes_GET_SIZE PyString_GET_SIZE
#define PyBytes_AS_STRING PyString_AS_STRING
#define PyUnicode_InternInPlace PyString_InternInPlace
#define PyUnicode_AsUTF8 PyString_AS_STRING
#endif
typedef struct nxt_python_run_ctx_s nxt_python_run_ctx_t;
@@ -64,15 +66,18 @@ typedef struct {
} nxt_py_error_t;
static nxt_int_t nxt_python_init(nxt_task_t *task, nxt_common_app_conf_t *conf);
static nxt_int_t nxt_python_init_strings(void);
static void nxt_python_request_handler(nxt_unit_request_info_t *req);
static void nxt_python_atexit(void);
static PyObject *nxt_python_create_environ(nxt_task_t *task);
static PyObject *nxt_python_get_environ(nxt_python_run_ctx_t *ctx);
static int nxt_python_add_sptr(nxt_python_run_ctx_t *ctx, const char *name,
static int nxt_python_add_sptr(nxt_python_run_ctx_t *ctx, PyObject *name,
nxt_unit_sptr_t *sptr, uint32_t size);
static int nxt_python_add_str(nxt_python_run_ctx_t *ctx, const char *name,
const char *str, uint32_t size);
static int nxt_python_add_field(nxt_python_run_ctx_t *ctx,
nxt_unit_field_t *field);
static int nxt_python_add_obj(nxt_python_run_ctx_t *ctx, PyObject *name,
PyObject *value);
static PyObject *nxt_py_start_resp(PyObject *self, PyObject *args);
static int nxt_python_response_add_field(nxt_python_run_ctx_t *ctx,
@@ -157,6 +162,48 @@ static PyThreadState *nxt_python_thread_state;
static nxt_python_run_ctx_t *nxt_python_run_ctx;
static PyObject *nxt_py_80_str;
static PyObject *nxt_py_close_str;
static PyObject *nxt_py_content_length_str;
static PyObject *nxt_py_content_type_str;
static PyObject *nxt_py_http_str;
static PyObject *nxt_py_https_str;
static PyObject *nxt_py_path_info_str;
static PyObject *nxt_py_query_string_str;
static PyObject *nxt_py_remote_addr_str;
static PyObject *nxt_py_request_method_str;
static PyObject *nxt_py_request_uri_str;
static PyObject *nxt_py_server_addr_str;
static PyObject *nxt_py_server_name_str;
static PyObject *nxt_py_server_port_str;
static PyObject *nxt_py_server_protocol_str;
static PyObject *nxt_py_wsgi_uri_scheme_str;
typedef struct {
nxt_str_t string;
PyObject **object_p;
} nxt_python_string_t;
static nxt_python_string_t nxt_python_strings[] = {
{ nxt_string("80"), &nxt_py_80_str },
{ nxt_string("close"), &nxt_py_close_str },
{ nxt_string("CONTENT_LENGTH"), &nxt_py_content_length_str },
{ nxt_string("CONTENT_TYPE"), &nxt_py_content_type_str },
{ nxt_string("http"), &nxt_py_http_str },
{ nxt_string("https"), &nxt_py_https_str },
{ nxt_string("PATH_INFO"), &nxt_py_path_info_str },
{ nxt_string("QUERY_STRING"), &nxt_py_query_string_str },
{ nxt_string("REMOTE_ADDR"), &nxt_py_remote_addr_str },
{ nxt_string("REQUEST_METHOD"), &nxt_py_request_method_str },
{ nxt_string("REQUEST_URI"), &nxt_py_request_uri_str },
{ nxt_string("SERVER_ADDR"), &nxt_py_server_addr_str },
{ nxt_string("SERVER_NAME"), &nxt_py_server_name_str },
{ nxt_string("SERVER_PORT"), &nxt_py_server_port_str },
{ nxt_string("SERVER_PROTOCOL"), &nxt_py_server_protocol_str },
{ nxt_string("wsgi.url_scheme"), &nxt_py_wsgi_uri_scheme_str },
};
static nxt_int_t
nxt_python_init(nxt_task_t *task, nxt_common_app_conf_t *conf)
{
@@ -239,6 +286,12 @@ nxt_python_init(nxt_task_t *task, nxt_common_app_conf_t *conf)
Py_InitializeEx(0);
module = NULL;
obj = NULL;
if (nxt_slow_path(nxt_python_init_strings() != NXT_OK)) {
nxt_alert(task, "Python failed to init string objects");
goto fail;
}
obj = PySys_GetObject((char *) "stderr");
if (nxt_slow_path(obj == NULL)) {
@@ -382,6 +435,31 @@ fail:
}
static nxt_int_t
nxt_python_init_strings(void)
{
PyObject *obj;
nxt_uint_t i;
nxt_python_string_t *pstr;
for (i = 0; i < nxt_nitems(nxt_python_strings); i++) {
pstr = &nxt_python_strings[i];
obj = PyString_FromStringAndSize((char *) pstr->string.start,
pstr->string.length);
if (nxt_slow_path(obj == NULL)) {
return NXT_ERROR;
}
PyUnicode_InternInPlace(&obj);
*pstr->object_p = obj;
}
return NXT_OK;
}
static void
nxt_python_request_handler(nxt_unit_request_info_t *req)
{
@@ -478,7 +556,7 @@ nxt_python_request_handler(nxt_unit_request_info_t *req)
rc = NXT_UNIT_ERROR;
}
close = PyObject_GetAttrString(response, "close");
close = PyObject_GetAttr(response, nxt_py_close_str);
if (close != NULL) {
result = PyObject_CallFunction(close, NULL);
@@ -512,6 +590,12 @@ done:
static void
nxt_python_atexit(void)
{
nxt_uint_t i;
for (i = 0; i < nxt_nitems(nxt_python_strings); i++) {
Py_XDECREF(*nxt_python_strings[i].object_p);
}
Py_XDECREF(nxt_py_stderr_flush);
Py_XDECREF(nxt_py_application);
Py_XDECREF(nxt_py_start_resp_obj);
@@ -655,7 +739,6 @@ static PyObject *
nxt_python_get_environ(nxt_python_run_ctx_t *ctx)
{
int rc;
char *name;
uint32_t i;
PyObject *environ;
nxt_unit_field_t *f;
@@ -681,47 +764,52 @@ nxt_python_get_environ(nxt_python_run_ctx_t *ctx)
} \
} while(0)
RC(nxt_python_add_sptr(ctx, "REQUEST_METHOD", &r->method,
RC(nxt_python_add_sptr(ctx, nxt_py_request_method_str, &r->method,
r->method_length));
RC(nxt_python_add_sptr(ctx, "REQUEST_URI", &r->target, r->target_length));
RC(nxt_python_add_sptr(ctx, "QUERY_STRING", &r->query, r->query_length));
RC(nxt_python_add_sptr(ctx, "PATH_INFO", &r->path, r->path_length));
RC(nxt_python_add_sptr(ctx, nxt_py_request_uri_str, &r->target,
r->target_length));
RC(nxt_python_add_sptr(ctx, nxt_py_query_string_str, &r->query,
r->query_length));
RC(nxt_python_add_sptr(ctx, nxt_py_path_info_str, &r->path,
r->path_length));
RC(nxt_python_add_sptr(ctx, "REMOTE_ADDR", &r->remote, r->remote_length));
RC(nxt_python_add_sptr(ctx, "SERVER_ADDR", &r->local, r->local_length));
RC(nxt_python_add_sptr(ctx, nxt_py_remote_addr_str, &r->remote,
r->remote_length));
RC(nxt_python_add_sptr(ctx, nxt_py_server_addr_str, &r->local,
r->local_length));
if (r->tls) {
RC(nxt_python_add_str(ctx, "wsgi.url_scheme", "https", 5));
RC(nxt_python_add_obj(ctx, nxt_py_wsgi_uri_scheme_str,
nxt_py_https_str));
} else {
RC(nxt_python_add_str(ctx, "wsgi.url_scheme", "http", 4));
RC(nxt_python_add_obj(ctx, nxt_py_wsgi_uri_scheme_str,
nxt_py_http_str));
}
RC(nxt_python_add_sptr(ctx, "SERVER_PROTOCOL", &r->version,
RC(nxt_python_add_sptr(ctx, nxt_py_server_protocol_str, &r->version,
r->version_length));
RC(nxt_python_add_sptr(ctx, "SERVER_NAME", &r->server_name,
RC(nxt_python_add_sptr(ctx, nxt_py_server_name_str, &r->server_name,
r->server_name_length));
RC(nxt_python_add_str(ctx, "SERVER_PORT", "80", 2));
RC(nxt_python_add_obj(ctx, nxt_py_server_port_str, nxt_py_80_str));
for (i = 0; i < r->fields_count; i++) {
f = r->fields + i;
name = nxt_unit_sptr_get(&f->name);
RC(nxt_python_add_sptr(ctx, name, &f->value, f->value_length));
RC(nxt_python_add_field(ctx, f));
}
if (r->content_length_field != NXT_UNIT_NONE_FIELD) {
f = r->fields + r->content_length_field;
RC(nxt_python_add_sptr(ctx, "CONTENT_LENGTH", &f->value,
RC(nxt_python_add_sptr(ctx, nxt_py_content_length_str, &f->value,
f->value_length));
}
if (r->content_type_field != NXT_UNIT_NONE_FIELD) {
f = r->fields + r->content_type_field;
RC(nxt_python_add_sptr(ctx, "CONTENT_TYPE", &f->value,
RC(nxt_python_add_sptr(ctx, nxt_py_content_type_str, &f->value,
f->value_length));
}
@@ -738,7 +826,7 @@ fail:
static int
nxt_python_add_sptr(nxt_python_run_ctx_t *ctx, const char *name,
nxt_python_add_sptr(nxt_python_run_ctx_t *ctx, PyObject *name,
nxt_unit_sptr_t *sptr, uint32_t size)
{
char *src;
@@ -756,10 +844,10 @@ nxt_python_add_sptr(nxt_python_run_ctx_t *ctx, const char *name,
return NXT_UNIT_ERROR;
}
if (nxt_slow_path(PyDict_SetItemString(ctx->environ, name, value) != 0)) {
if (nxt_slow_path(PyDict_SetItem(ctx->environ, name, value) != 0)) {
nxt_unit_req_error(ctx->req,
"Python failed to set the \"%s\" environ value",
name);
PyUnicode_AsUTF8(name));
Py_DECREF(value);
return NXT_UNIT_ERROR;
@@ -772,37 +860,67 @@ nxt_python_add_sptr(nxt_python_run_ctx_t *ctx, const char *name,
static int
nxt_python_add_str(nxt_python_run_ctx_t *ctx, const char *name,
const char *str, uint32_t size)
nxt_python_add_field(nxt_python_run_ctx_t *ctx, nxt_unit_field_t *field)
{
PyObject *value;
char *src;
PyObject *name, *value;
if (nxt_slow_path(str == NULL)) {
return NXT_UNIT_OK;
}
src = nxt_unit_sptr_get(&field->name);
value = PyString_FromStringAndSize(str, size);
if (nxt_slow_path(value == NULL)) {
name = PyString_FromStringAndSize(src, field->name_length);
if (nxt_slow_path(name == NULL)) {
nxt_unit_req_error(ctx->req,
"Python failed to create value string \"%.*s\"",
(int) size, str);
"Python failed to create name string \"%.*s\"",
(int) field->name_length, src);
nxt_python_print_exception();
return NXT_UNIT_ERROR;
}
if (nxt_slow_path(PyDict_SetItemString(ctx->environ, name, value) != 0)) {
src = nxt_unit_sptr_get(&field->value);
value = PyString_FromStringAndSize(src, field->value_length);
if (nxt_slow_path(value == NULL)) {
nxt_unit_req_error(ctx->req,
"Python failed to create value string \"%.*s\"",
(int) field->value_length, src);
nxt_python_print_exception();
goto fail;
}
if (nxt_slow_path(PyDict_SetItem(ctx->environ, name, value) != 0)) {
nxt_unit_req_error(ctx->req,
"Python failed to set the \"%s\" environ value",
name);
PyUnicode_AsUTF8(name));
goto fail;
}
Py_DECREF(name);
Py_DECREF(value);
return NXT_UNIT_OK;
fail:
Py_DECREF(name);
Py_XDECREF(value);
return NXT_UNIT_ERROR;
}
static int
nxt_python_add_obj(nxt_python_run_ctx_t *ctx, PyObject *name, PyObject *value)
{
if (nxt_slow_path(PyDict_SetItem(ctx->environ, name, value) != 0)) {
nxt_unit_req_error(ctx->req,
"Python failed to set the \"%s\" environ value",
PyUnicode_AsUTF8(name));
return NXT_UNIT_ERROR;
}
Py_DECREF(value);
return NXT_UNIT_OK;
}