Deprecated tcp_server, added an accept loop example, fixed up two sites that still used tcp_server.

1 files changed, 51 insertions, 0 deletions

diff --git a/examples/accept_loop.py b/examples/accept_loop.py
new file mode 100644
index 0000000..9664881
--- /dev/null
+++ b/examples/accept_loop.py
@@ -0,0 +1,51 @@
+"""This is a simple echo server that demonstrates an accept loop.  To use it, 
+run this script and then run 'telnet localhost 6011' in a different terminal.
+
+If you send an empty line to the echo server it will close the connection while
+leaving the server running.  If you send the word "shutdown" to the echo server
+it will gracefully exit, terminating any other open connections.
+
+The actual accept loop logic is fully contained within the run_accept_loop 
+function.  Everything else is setup.
+"""
+
+from eventlet.green import socket
+from eventlet.api import spawn
+
+class Acceptor(object):
+    def __init__(self, port=6011):
+        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self.sock.setsockopt(
+            socket.SOL_SOCKET,
+            socket.SO_REUSEADDR, 1)
+        self.sock.bind(('localhost', port))
+        self.sock.listen(50)
+        self.sock.settimeout(0.5)
+        self.done = False
+    
+    def run_accept_loop(self):
+        while not self.done:
+            try:
+                spawn(self.handle_one_client, self.sock.accept())
+            except socket.timeout:
+                pass
+            
+    def handle_one_client(self, sockpair):
+        sock, addr = sockpair
+        print "Accepted client", addr
+        fd = sock.makefile()
+        line = fd.readline()
+        while line.strip():
+            fd.write(line)
+            fd.flush()
+            if line.startswith("shutdown"):
+                self.done = True
+                print "Received shutdown"
+                break
+            line = fd.readline()
+        print "Done with client", addr
+
+if __name__ == "__main__":
+    a = Acceptor()
+    a.run_accept_loop()
+    print "Exiting"
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