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socketify.py/main.py

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import cffi
import threading
from datetime import datetime
import time
import os
ffi = cffi.FFI()
ffi.cdef("""
struct us_socket_context_options_t {
const char *key_file_name;
const char *cert_file_name;
const char *passphrase;
const char *dh_params_file_name;
const char *ca_file_name;
const char *ssl_ciphers;
int ssl_prefer_low_memory_usage;
};
struct us_socket_context_t {
struct us_loop_t *loop;
unsigned short timestamp;
struct us_socket_t *head;
struct us_socket_t *iterator;
struct us_socket_context_t *prev, *next;
struct us_socket_t *(*on_open)(struct us_socket_t *, int is_client, char *ip, int ip_length);
struct us_socket_t *(*on_data)(struct us_socket_t *, char *data, int length);
struct us_socket_t *(*on_writable)(struct us_socket_t *);
struct us_socket_t *(*on_close)(struct us_socket_t *, int code, void *reason);
struct us_socket_t *(*on_socket_timeout)(struct us_socket_t *);
struct us_socket_t *(*on_end)(struct us_socket_t *);
struct us_socket_t *(*on_connect_error)(struct us_socket_t *, int code);
int (*is_low_prio)(struct us_socket_t *);
};
struct us_poll_t {
struct {
signed int fd : 28;
unsigned int poll_type : 4;
} state;
};
struct us_socket_t {
struct us_poll_t p;
struct us_socket_context_t *context;
struct us_socket_t *prev, *next;
unsigned short timeout : 14;
unsigned short low_prio_state : 2;
};
struct us_listen_socket_t {
struct us_socket_t s;
unsigned int socket_ext_size;
};
void us_listen_socket_close(int ssl, struct us_listen_socket_t *ls);
typedef enum
{
_COMPRESSOR_MASK = 0x00FF,
_DECOMPRESSOR_MASK = 0x0F00,
DISABLED = 0,
SHARED_COMPRESSOR = 1,
SHARED_DECOMPRESSOR = 1 << 8,
DEDICATED_DECOMPRESSOR_32KB = 15 << 8,
DEDICATED_DECOMPRESSOR_16KB = 14 << 8,
DEDICATED_DECOMPRESSOR_8KB = 13 << 8,
DEDICATED_DECOMPRESSOR_4KB = 12 << 8,
DEDICATED_DECOMPRESSOR_2KB = 11 << 8,
DEDICATED_DECOMPRESSOR_1KB = 10 << 8,
DEDICATED_DECOMPRESSOR_512B = 9 << 8,
DEDICATED_DECOMPRESSOR = 15 << 8,
DEDICATED_COMPRESSOR_3KB = 9 << 4 | 1,
DEDICATED_COMPRESSOR_4KB = 9 << 4 | 2,
DEDICATED_COMPRESSOR_8KB = 10 << 4 | 3,
DEDICATED_COMPRESSOR_16KB = 11 << 4 | 4,
DEDICATED_COMPRESSOR_32KB = 12 << 4 | 5,
DEDICATED_COMPRESSOR_64KB = 13 << 4 | 6,
DEDICATED_COMPRESSOR_128KB = 14 << 4 | 7,
DEDICATED_COMPRESSOR_256KB = 15 << 4 | 8,
DEDICATED_COMPRESSOR = 15 << 4 | 8
} uws_compress_options_t;
typedef enum
{
CONTINUATION = 0,
TEXT = 1,
BINARY = 2,
CLOSE = 8,
PING = 9,
PONG = 10
} uws_opcode_t;
typedef enum
{
BACKPRESSURE,
SUCCESS,
DROPPED
} uws_sendstatus_t;
typedef struct
{
int port;
const char *host;
int options;
} uws_app_listen_config_t;
struct uws_app_s;
struct uws_req_s;
struct uws_res_s;
struct uws_websocket_s;
struct uws_header_iterator_s;
typedef struct uws_app_s uws_app_t;
typedef struct uws_req_s uws_req_t;
typedef struct uws_res_s uws_res_t;
typedef struct uws_socket_context_s uws_socket_context_t;
typedef struct uws_websocket_s uws_websocket_t;
typedef void (*uws_websocket_handler)(uws_websocket_t *ws);
typedef void (*uws_websocket_message_handler)(uws_websocket_t *ws, const char *message, size_t length, uws_opcode_t opcode);
typedef void (*uws_websocket_ping_pong_handler)(uws_websocket_t *ws, const char *message, size_t length);
typedef void (*uws_websocket_close_handler)(uws_websocket_t *ws, int code, const char *message, size_t length);
typedef void (*uws_websocket_upgrade_handler)(uws_res_t *response, uws_req_t *request, uws_socket_context_t *context);
typedef struct
{
uws_compress_options_t compression;
unsigned int maxPayloadLength;
unsigned short idleTimeout;
unsigned int maxBackpressure;
bool closeOnBackpressureLimit;
bool resetIdleTimeoutOnSend;
bool sendPingsAutomatically;
unsigned short maxLifetime;
uws_websocket_upgrade_handler upgrade;
uws_websocket_handler open;
uws_websocket_message_handler message;
uws_websocket_handler drain;
uws_websocket_ping_pong_handler ping;
uws_websocket_ping_pong_handler pong;
uws_websocket_close_handler close;
} uws_socket_behavior_t;
typedef void (*uws_listen_handler)(struct us_listen_socket_t *listen_socket, uws_app_listen_config_t config, void *user_data);
typedef void (*uws_method_handler)(uws_res_t *response, uws_req_t *request, void *user_data);
typedef void (*uws_filter_handler)(uws_res_t *response, int, void *user_data);
typedef void (*uws_missing_server_handler)(const char *hostname, void *user_data);
uws_app_t *uws_create_app(int ssl, struct us_socket_context_options_t options);
void uws_app_destroy(int ssl, uws_app_t *app);
void uws_app_get(int ssl, uws_app_t *app, const char *pattern, uws_method_handler handler, void *user_data);
void uws_app_post(int ssl, uws_app_t *app, const char *pattern, uws_method_handler handler, void *user_data);
void uws_app_options(int ssl, uws_app_t *app, const char *pattern, uws_method_handler handler, void *user_data);
void uws_app_delete(int ssl, uws_app_t *app, const char *pattern, uws_method_handler handler, void *user_data);
void uws_app_patch(int ssl, uws_app_t *app, const char *pattern, uws_method_handler handler, void *user_data);
void uws_app_put(int ssl, uws_app_t *app, const char *pattern, uws_method_handler handler, void *user_data);
void uws_app_head(int ssl, uws_app_t *app, const char *pattern, uws_method_handler handler, void *user_data);
void uws_app_connect(int ssl, uws_app_t *app, const char *pattern, uws_method_handler handler, void *user_data);
void uws_app_trace(int ssl, uws_app_t *app, const char *pattern, uws_method_handler handler, void *user_data);
void uws_app_any(int ssl, uws_app_t *app, const char *pattern, uws_method_handler handler, void *user_data);
void uws_app_run(int ssl, uws_app_t *);
void uws_app_listen(int ssl, uws_app_t *app, int port, uws_listen_handler handler, void *user_data);
void uws_app_listen_with_config(int ssl, uws_app_t *app, uws_app_listen_config_t config, uws_listen_handler handler, void *user_data);
bool uws_constructor_failed(int ssl, uws_app_t *app);
unsigned int uws_num_subscribers(int ssl, uws_app_t *app, const char *topic);
bool uws_publish(int ssl, uws_app_t *app, const char *topic, size_t topic_length, const char *message, size_t message_length, uws_opcode_t opcode, bool compress);
void *uws_get_native_handle(int ssl, uws_app_t *app);
void uws_remove_server_name(int ssl, uws_app_t *app, const char *hostname_pattern);
void uws_add_server_name(int ssl, uws_app_t *app, const char *hostname_pattern);
void uws_add_server_name_with_options(int ssl, uws_app_t *app, const char *hostname_pattern, struct us_socket_context_options_t options);
void uws_missing_server_name(int ssl, uws_app_t *app, uws_missing_server_handler handler, void *user_data);
void uws_filter(int ssl, uws_app_t *app, uws_filter_handler handler, void *user_data);
void uws_res_end(int ssl, uws_res_t *res, const char *data, size_t length, bool close_connection);
void uws_res_pause(int ssl, uws_res_t *res);
void uws_res_resume(int ssl, uws_res_t *res);
void uws_res_write_continue(int ssl, uws_res_t *res);
void uws_res_write_status(int ssl, uws_res_t *res, const char *status, size_t length);
void uws_res_write_header(int ssl, uws_res_t *res, const char *key, size_t key_length, const char *value, size_t value_length);
void uws_res_write_header_int(int ssl, uws_res_t *res, const char *key, size_t key_length, uint64_t value);
void uws_res_end_without_body(int ssl, uws_res_t *res);
bool uws_res_write(int ssl, uws_res_t *res, const char *data, size_t length);
uintmax_t uws_res_get_write_offset(int ssl, uws_res_t *res);
bool uws_res_has_responded(int ssl, uws_res_t *res);
void uws_res_on_writable(int ssl, uws_res_t *res, bool (*handler)(uws_res_t *res, uintmax_t, void *opcional_data), void *user_data);
void uws_res_on_aborted(int ssl, uws_res_t *res, void (*handler)(uws_res_t *res, void *opcional_data), void *opcional_data);
void uws_res_on_data(int ssl, uws_res_t *res, void (*handler)(uws_res_t *res, const char *chunk, size_t chunk_length, bool is_end, void *opcional_data), void *opcional_data);
void uws_res_upgrade(int ssl, uws_res_t *res, void *data, const char *sec_web_socket_key, size_t sec_web_socket_key_length, const char *sec_web_socket_protocol, size_t sec_web_socket_protocol_length, const char *sec_web_socket_extensions, size_t sec_web_socket_extensions_length, uws_socket_context_t *ws);
bool uws_req_is_ancient(uws_req_t *res);
bool uws_req_get_yield(uws_req_t *res);
void uws_req_set_field(uws_req_t *res, bool yield);
size_t uws_req_get_url(uws_req_t *res, const char **dest);
size_t uws_req_get_method(uws_req_t *res, const char **dest);
size_t uws_req_get_header(uws_req_t *res, const char *lower_case_header, size_t lower_case_header_length, const char **dest);
size_t uws_req_get_query(uws_req_t *res, const char *key, size_t key_length, const char **dest);
size_t uws_req_get_parameter(uws_req_t *res, unsigned short index, const char **dest);
""")
lib = ffi.dlopen("./libuwebsockets.so")
@ffi.callback("void(uws_res_t *, uws_req_t *, void *)")
def uws_generic_method_handler(res, req, user_data):
if not user_data == ffi.NULL:
handler = ffi.from_handle(user_data)
response = AppResponse(res, False)
request = AppRequest(req)
handler(response, request)
@ffi.callback("void(uws_res_t *, uws_req_t *, void *)")
def uws_generic_ssl_method_handler(res, req, user_data):
if not user_data == ffi.NULL:
handler = ffi.from_handle(user_data)
response = AppResponse(res, True)
request = AppRequest(req)
handler(response, request)
@ffi.callback("void(struct us_listen_socket_t *, uws_app_listen_config_t, void *)")
def uws_generic_listen_handler(listen_socket, config, user_data):
if not user_data == ffi.NULL:
app = ffi.from_handle(user_data)
if hasattr(app, "_listen_handler") and hasattr(app._listen_handler, '__call__'):
app.socket = listen_socket
app._listen_handler(None if config == ffi.NULL else AppListenOptions(port=int(config.port),host=None if config.host == ffi.NULL else ffi.string(config.host).decode("utf-8"), options=int(config.options)))
@ffi.callback("void(uws_res_t *, void*)")
def uws_generic_abord_handler(response, user_data):
if not user_data == ffi.NULL:
res = ffi.from_handle(user_data)
res.aborted = True
res.trigger_aborted()
class AppRequest:
def __init__(self, request):
self.req = request
def get_url(self):
buffer = ffi.new("char**")
length = lib.uws_req_get_url(self.req, buffer)
buffer_address = ffi.addressof(buffer, 0)[0]
if buffer_address == ffi.NULL:
return None
return ffi.unpack(buffer_address, length)
def get_method(self):
buffer = ffi.new("char**")
length = lib.uws_req_get_method(self.req, buffer)
buffer_address = ffi.addressof(buffer, 0)[0]
if buffer_address == ffi.NULL:
return None
return ffi.unpack(buffer_address, length)
def get_header(self, lower_case_header):
buffer = ffi.new("char**")
data = lower_case_header.encode("utf-8")
length = lib.uws_req_get_header(self.req, data, len(data), buffer)
buffer_address = ffi.addressof(buffer, 0)[0]
if buffer_address == ffi.NULL:
return None
return ffi.unpack(buffer_address, length)
def get_query(self, key):
buffer = ffi.new("char**")
data = key.encode("utf-8")
length = lib.uws_req_get_query(self.req, data, len(data), buffer)
buffer_address = ffi.addressof(buffer, 0)[0]
if buffer_address == ffi.NULL:
return None
return ffi.unpack(buffer_address, length)
def get_parameter(self, index):
buffer = ffi.new("char**")
length = lib.uws_req_get_parameter(self.req, ffi.cast("unsigned short", index), buffer)
buffer_address = ffi.addressof(buffer, 0)[0]
if buffer_address == ffi.NULL:
return None
return ffi.unpack(buffer_address, length)
def set_yield(self, has_yield):
lib.uws_req_set_field(self.req, 1 if has_yield else 0)
def get_yield(self):
return bool(lib.uws_req_get_yield(self.req))
def is_ancient(self):
return bool(lib.uws_req_is_ancient(self.req))
class AppResponse:
def __init__(self, response, is_ssl):
self.res = response
self.SSL = ffi.cast("int", 1 if is_ssl else 0)
self.aborted = False
self._ptr = ffi.new_handle(self)
lib.uws_res_on_aborted(self.SSL, response, uws_generic_abord_handler, self._ptr)
def end(self, message, end_connection=False):
if not self.aborted:
data = message.encode("utf-8")
lib.uws_res_end(self.SSL, self.res, data, len(data), 1 if end_connection else 0)
return self
def pause(self):
if not self.aborted:
lib.uws_res_pause(self.SSL, self.res)
return self
def resume(self):
if not self.aborted:
lib.uws_res_resume(self.SSL, self.res)
return self
def write_continue(self):
if not self.aborted:
lib.uws_res_write_continue(self.SSL, self.res)
return self
def write_status(self, status_text):
if not self.aborted:
data = status_text.encode("utf-8")
lib.uws_res_write_status(self.SSL, self.res, data, len(data))
return self
def write_header(self, key, value):
if not self.aborted:
key_data = key.encode("utf-8")
if isinstance(value, int):
lib.uws_res_write_header_int(self.SSL, self.res, key_data, len(key_data), ffi.cast("uint64_t", value))
else:
value_data = value.encode("utf-8")
lib.uws_res_write_header(self.SSL, self.res, key_data, len(key_data), value_data, len(value_data))
return self
def end_without_body(self):
if not self.aborted:
lib.uws_res_end_without_body(self.SSL, self.res)
return self
def write(self, message):
if not self.aborted:
data = message.encode("utf-8")
lib.uws_res_write(self.SSL, self.res, data, len(data))
return self
def get_write_offset(self, message):
if not self.aborted:
data = message.encode("utf-8")
return int(lib.uws_res_get_write_offset(self.SSL, self.res, data, len(data)))
return 0
def has_responded(self):
if not self.aborted:
return False
return bool(lib.uws_res_has_responded(self.SSL, self.res, data, len(data)))
def trigger_aborted(self):
if hasattr(self, "_aborted_handler") and hasattr(self._aborted_handler, '__call__'):
self._aborted_handler()
return self
def on_aborted(self, handler):
if hasattr(handler, '__call__'):
self._aborted_handler = handler
return self
# void uws_res_on_data(int ssl, uws_res_t *res, void (*handler)(uws_res_t *res, const char *chunk, size_t chunk_length, bool is_end, void *opcional_data), void *opcional_data);
# void uws_res_upgrade(int ssl, uws_res_t *res, void *data, const char *sec_web_socket_key, size_t sec_web_socket_key_length, const char *sec_web_socket_protocol, size_t sec_web_socket_protocol_length, const char *sec_web_socket_extensions, size_t sec_web_socket_extensions_length, uws_socket_context_t *ws);
# void uws_res_on_writable(int ssl, uws_res_t *res, bool (*handler)(uws_res_t *res, uintmax_t, void *opcional_data), void *user_data);
class App:
def __init__(self, options=None):
socket_options_ptr = ffi.new("struct us_socket_context_options_t *")
socket_options = socket_options_ptr[0]
self.options = options
if options != None:
self.is_ssl = True
self.SSL = ffi.cast("int", 1)
socket_options.key_file_name = ffi.NULL if options.key_file_name == None else ffi.new("char[]", options.key_file_name.encode("utf-8"))
socket_options.key_file_name = ffi.NULL if options.key_file_name == None else ffi.new("char[]", options.key_file_name.encode("utf-8"))
socket_options.cert_file_name = ffi.NULL if options.cert_file_name == None else ffi.new("char[]", options.cert_file_name.encode("utf-8"))
socket_options.passphrase = ffi.NULL if options.passphrase == None else ffi.new("char[]", options.passphrase.encode("utf-8"))
socket_options.dh_params_file_name = ffi.NULL if options.dh_params_file_name == None else ffi.new("char[]", options.dh_params_file_name.encode("utf-8"))
socket_options.ca_file_name = ffi.NULL if options.ca_file_name == None else ffi.new("char[]", options.ca_file_name.encode("utf-8"))
socket_options.ssl_ciphers = ffi.NULL if options.ssl_ciphers == None else ffi.new("char[]", options.ssl_ciphers.encode("utf-8"))
socket_options.ssl_prefer_low_memory_usage = ffi.cast("int", options.ssl_prefer_low_memory_usage)
else:
self.is_ssl = False
self.SSL = ffi.cast("int", 0)
self.app = lib.uws_create_app(self.SSL, socket_options)
self._ptr = ffi.new_handle(self)
if bool(lib.uws_constructor_failed(self.SSL, self.app)):
raise RuntimeError("Failed to create connection")
self.handlers = []
def get(self, path, handler):
user_data = ffi.new_handle(handler)
self.handlers.append(user_data) #Keep alive handler
lib.uws_app_get(self.SSL, self.app, path.encode("utf-8"), uws_generic_ssl_method_handler if self.is_ssl else uws_generic_method_handler, user_data)
return self
def post(self, path, handler):
user_data = ffi.new_handle(handler)
self.handlers.append(user_data) #Keep alive handler
lib.uws_app_post(self.SSL, self.app, path.encode("utf-8"), uws_generic_ssl_method_handler if self.is_ssl else uws_generic_method_handler, user_data)
return self
def options(self, path, handler):
user_data = ffi.new_handle(handler)
self.handlers.append(user_data) #Keep alive handler
lib.uws_app_options(self.SSL, self.app, path.encode("utf-8"), uws_generic_ssl_method_handler if self.is_ssl else uws_generic_method_handler, user_data)
return self
def delete(self, path, handler):
user_data = ffi.new_handle(handler)
self.handlers.append(user_data) #Keep alive handler
lib.uws_app_delete(self.SSL, self.app, path.encode("utf-8"), uws_generic_ssl_method_handler if self.is_ssl else uws_generic_method_handler, user_data)
return self
def patch(self, path, handler):
user_data = ffi.new_handle(handler)
self.handlers.append(user_data) #Keep alive handler
lib.uws_app_patch(self.SSL, self.app, path.encode("utf-8"), uws_generic_ssl_method_handler if self.is_ssl else uws_generic_method_handler, user_data)
return self
def put(self, path, handler):
user_data = ffi.new_handle(handler)
self.handlers.append(user_data) #Keep alive handler
lib.uws_app_put(self.SSL, self.app, path.encode("utf-8"), uws_generic_ssl_method_handler if self.is_ssl else uws_generic_method_handler, user_data)
return self
def head(self, path, handler):
user_data = ffi.new_handle(handler)
self.handlers.append(user_data) #Keep alive handler
lib.uws_app_head(self.SSL, self.app, path.encode("utf-8"), uws_generic_ssl_method_handler if self.is_ssl else uws_generic_method_handler, user_data)
return self
def connect(self, path, handler):
user_data = ffi.new_handle(handler)
self.handlers.append(user_data) #Keep alive handler
lib.uws_app_connect(self.SSL, self.app, path.encode("utf-8"), uws_generic_ssl_method_handler if self.is_ssl else uws_generic_method_handler, user_data)
return self
def trace(self, path, handler):
user_data = ffi.new_handle(handler)
self.handlers.append(user_data) #Keep alive handler
lib.uws_app_trace(self.SSL, self.app, path.encode("utf-8"), uws_generic_ssl_method_handler if self.is_ssl else uws_generic_method_handler, user_data)
return self
def any(self, path, handler):
user_data = ffi.new_handle(handler)
self.handlers.append(user_data) #Keep alive handler
lib.uws_app_any(self.SSL, self.app, path.encode("utf-8"), uws_generic_ssl_method_handler if self.is_ssl else uws_generic_method_handler, user_data)
return self
def listen(self, port_or_options, handler):
self._listen_handler = handler
if isinstance(port_or_options, int):
lib.uws_app_listen(self.SSL, self.app, ffi.cast("int", port_or_options), uws_generic_listen_handler, self._ptr)
else:
native_options = ffi.new("uws_app_listen_config_t *")
options = native_options[0]
options.port = ffi.cast("int", port_or_options.port)
options.host = ffi.NULL if port_or_options.host == None else ffi.new("char[]", port_or_options.host.encode("utf-8"))
options.options = ffi.cast("int", port_or_options.options)
self.native_options_listen = native_options #Keep alive native_options
lib.uws_app_listen_with_config(self.SSL, self.app, options, uws_generic_listen_handler, self._ptr)
return self
def run(self):
lib.uws_app_run(self.SSL, self.app)
return self
def close(self):
if hasattr(self, "socket"):
if not self.socket == ffi.NULL:
lib.us_listen_socket_close(self.SSL, self.socket)
return self
def __del__(self):
lib.uws_app_destroy(self.SSL, self.app)
class AppListenOptions:
def __init__(self, port=0, host=None, options=0):
if not isinstance(port, int): raise RuntimeError("port must be an int")
if host != None and not isinstance(host, str): raise RuntimeError("host must be an String or None")
if not isinstance(options, int): raise RuntimeError("options must be an int")
self.port = port
self.host = host
self.options = options
# typedef struct
# {
# int port;
# const char *host;
# int options;
# } uws_app_listen_config_t;
class AppOptions:
def __init__(self, key_file_name=None, cert_file_name=None, passphrase=None, dh_params_file_name=None, ca_file_name=None, ssl_ciphers=None, ssl_prefer_low_memory_usage=0):
if key_file_name != None and not isinstance(key_file_name, str): raise RuntimeError("key_file_name must be an String or None")
if cert_file_name != None and not isinstance(cert_file_name, str): raise RuntimeError("cert_file_name must be an String or None")
if passphrase != None and not isinstance(passphrase, str): raise RuntimeError("passphrase must be an String or None")
if dh_params_file_name != None and not isinstance(dh_params_file_name, str): raise RuntimeError("dh_params_file_name must be an String or None")
if ca_file_name != None and not isinstance(ca_file_name, str): raise RuntimeError("ca_file_name must be an String or None")
if ssl_ciphers != None and not isinstance(ssl_ciphers, str): raise RuntimeError("ssl_ciphers must be an String or None")
if not isinstance(ssl_prefer_low_memory_usage, int): raise RuntimeError("ssl_prefer_low_memory_usage must be an int")
self.key_file_name = key_file_name
self.cert_file_name = cert_file_name
self.passphrase = passphrase
self.dh_params_file_name = dh_params_file_name
self.ca_file_name = ca_file_name
self.ssl_ciphers = ssl_ciphers
self.ssl_prefer_low_memory_usage = ssl_prefer_low_memory_usage
current_http_date = datetime.utcnow().isoformat() + "Z"
stopped = False
def time_thread():
while not stopped:
global current_http_date
current_http_date = datetime.utcnow().isoformat() + "Z"
time.sleep(1)
def plaintext(res, req):
res.write_header("Date", current_http_date)
res.write_header("Server", "uws.py")
res.write_header("Content-Type", "text/plain")
res.end("Hello, World!")
def run_app():
timing = threading.Thread(target=time_thread, args=())
timing.start()
app = App(AppOptions(key_file_name="./misc/key.pem", cert_file_name="./misc/cert.pem", passphrase="1234"))
app.get("/", plaintext)
# app.listen(3000, lambda config: print("Listening on port http://localhost:%s now\n" % str(config.port)))
app.listen(AppListenOptions(port=3000, host="0.0.0.0"), lambda config: print("Listening on port http://%s:%d now\n" % (config.host, config.port)))
app.run()
def create_fork():
n = os.fork()
# n greater than 0 means parent process
if not n > 0:
run_app()
for index in range(1):
create_fork()
run_app()
#pip install git+https://github.com/inducer/pycuda.git (submodules are cloned recursively)
#https://stackoverflow.com/questions/1754966/how-can-i-run-a-makefile-in-setup-py
#https://packaging.python.org/en/latest/tutorials/packaging-projects/
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