kore

commit 66dd856bdc962b2d2b3c46074a27be4c9c597fcd
parent 5e84ebdab23e83d9bf9524162c3a95cddb2405b2
Author: Joris Vink <joris@coders.se>
Date:   Sun,  2 May 2021 16:08:32 +0200

and add the echo.py file of course..

Diffstat:
examples/python-echo/echo.py
 | 
67
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1 file changed, 67 insertions(+), 0 deletions(-)
diff --git a/examples/python-echo/echo.py b/examples/python-echo/echo.py
@@ -0,0 +1,67 @@
+#
+# 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())