canonical base echo server as starting point for http server exercise

Author: cewing

resources/session02/http_server.py

@@ -0,0 +1,40 @@
+import socket
+import sys
+
+
+def server(log_buffer=sys.stderr):
+    address = ('127.0.0.1', 10000)
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    print >>log_buffer, "making a server on {0}:{1}".format(*address)
+    sock.bind(address)
+    sock.listen(1)
+    
+    try:
+        while True:
+            print >>log_buffer, 'waiting for a connection'
+            conn, addr = sock.accept() # blocking
+            try:
+                print >>log_buffer, 'connection - {0}:{1}'.format(*addr)
+                while True:
+                    data = conn.recv(16)
+                    print >>log_buffer, 'received "{0}"'.format(data)
+                    if data:
+                        msg = 'sending data back to client'
+                        print >>log_buffer, msg
+                        conn.sendall(data)
+                    else:
+                        msg = 'no more data from {0}:{1}'.format(*addr)
+                        print >>log_buffer, msg
+                        break
+            finally:
+                conn.close()
+            
+    except KeyboardInterrupt:
+        sock.close()
+        return
+
+
+if __name__ == '__main__':
+    server()
+    sys.exit(0)