Simplify the echo example, kore can just run the file nowadays.

This commit is contained in:
Joris Vink 2021-05-02 16:07:41 +02:00
parent 582e18d2ec
commit 5e84ebdab2
5 changed files with 11 additions and 129 deletions

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Example of using the asynchronous python api to create a simple
echo server.
Kore must have been built with PYTHON=1.
On the command-line run the following
$ kore echo.py
Then connect to 127.0.0.1 port 6969 using netcat or so and you'll
see it echo back everything you send it.

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# python-echo build config
# You can switch flavors using: kodev flavor [newflavor]
# Set to yes if you wish to produce a single binary instead
# of a dynamic library. If you set this to yes you must also
# set kore_source together with kore_flavor.
single_binary=yes
kore_source=../../
kore_flavor=NOTLS=1 PYTHON=1
# The flags below are shared between flavors
cflags=-Wall -Wmissing-declarations -Wshadow
cflags=-Wstrict-prototypes -Wmissing-prototypes
cflags=-Wpointer-arith -Wcast-qual -Wsign-compare
cxxflags=-Wall -Wmissing-declarations -Wshadow
cxxflags=-Wpointer-arith -Wcast-qual -Wsign-compare
# Mime types for assets served via the builtin asset_serve_*
#mime_add=txt:text/plain; charset=utf-8
#mime_add=png:image/png
#mime_add=html:text/html; charset=utf-8
dev {
# These flags are added to the shared ones when
# you build the "dev" flavor.
cflags=-g
cxxflags=-g
}
#prod {
# You can specify additional flags here which are only
# included if you build with the "prod" flavor.
#}

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# python-echo configuration
python_import src/echo.py

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#
# Copyright (c) 2013-2018 Joris Vink <joris@coders.se>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
import kore
import socket
class EchoServer:
# Setup socket + wrap it inside of a kore socket so we can use it.
def __init__(self):
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setblocking(False)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(("127.0.0.1", 6969))
sock.listen()
self.conn = kore.socket_wrap(sock)
# Wait for a new client to connect, then create a new task
# that calls handle_client with the ocnnected client as
# the argument.
async def run(self):
while True:
try:
client = await self.conn.accept()
kore.task_create(self.handle_client(client))
client = None
except Exception as e:
kore.fatal("exception %s" % e)
# Each client will run as this co-routine.
# In this case we pass a timeout of 1 second to the recv() call
# which will throw a TimeoutError exception in case the timeout
# is hit before data is read from the socket.
#
# This timeout argument is optional. If none is specified the call
# will wait until data becomes available.
async def handle_client(self, client):
while True:
try:
data = await client.recv(1024, 1000)
if data is None:
break
await client.send(data)
except TimeoutError as e:
print("timed out reading (%s)" % e)
except Exception as e:
print("client got exception %s" % e)
client.close()
# Setup the server object.
server = EchoServer()
# Create a task that will execute inside of Kore as a co-routine.
kore.task_create(server.run())

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/*
* Copyright (c) 2020 Joris Vink <joris@coders.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <kore/kore.h>
#include <kore/hooks.h>
/* Let kore handle the default option parsing. */
void
kore_parent_configure(int argc, char **argv)
{
kore_default_getopt(argc, argv);
}