diff --git a/tcp_lineserver.py b/tcp_lineserver.py
deleted file mode 100644
index 9453b14..0000000
--- a/tcp_lineserver.py
+++ /dev/null
@@ -1,133 +0,0 @@
-import asyncore
-import socket
-import errno
-import re
-import circularlog
-import logging
-
-
-class LineHandler(asyncore.dispatcher_with_send):
-
-    def __init__(self, sock):
-        self.buffer = b""
-        asyncore.dispatcher_with_send.__init__(self, sock)
-        self.crlf = 0
-
-    def handle_read(self):
-        data = self.recv(8192)
-        if data:
-            parts = data.split(b"\n")
-            if len(parts) == 1:
-                self.buffer += data
-            else:
-                self.handle_line((self.buffer + parts[0]).decode('ascii'))
-                for part in parts[1:-1]:
-                    if part[-1] == b"\r":
-                        self.crlf = True
-                        part = part[:-1]
-                    else:
-                        self.crlf = False
-                    self.handle_line(part.decode('ascii'))
-                self.buffer = parts[-1]
-
-    def send_line(self, line):
-        self.send(line.encode('ascii') + (b"\r\n" if self.crlf else b"\n"))
-        
-    def handle_line(self, line):
-        '''
-        test: simple echo handler
-        '''
-        self.send_line("> " + line)
-
-
-class LineServer(asyncore.dispatcher):
-
-    def __init__(self, host, port, lineHandlerClass):
-        asyncore.dispatcher.__init__(self)
-        self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
-        self.set_reuse_addr()
-        self.bind((host, port))
-        self.listen(5)
-        self.lineHandlerClass = lineHandlerClass
-
-    def handle_accept(self):
-        pair = self.accept()
-        if pair is not None:
-            sock, addr = pair
-            print("Incoming connection from %s" % repr(addr))
-            handler = self.lineHandlerClass(sock)
-
-    def loop(self):
-        asyncore.loop()
-
-
-class Disconnected(Exception):
-    pass
-
-
-class LineClient(object):
-
-    def __init__(self, host_port, announcement=None, filter_ascii=False, ridername="r"):
-        self.host_port = host_port
-        self.filter_ascii = filter_ascii
-        self.announcement = announcement
-        self.circular = circularlog.Rider(ridername)
-        self.connected = False
-        
-    def connect(self):
-        logging.info("connect to %s %s", "%s:%d" % self.host_port, getattr(self, 'name', '?'))
-        self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        self.socket.connect(self.host_port)
-        self.connected = True
-        self.buffer = [b""]
-        if self.announcement:
-            self.send_line('\n'.join(self.announcement))
-         
-    def get_line(self):
-        if not self.connected:
-            logging.info("connect for get_line")
-            self.connect()
-        while len(self.buffer) <= 1:
-            self.socket.setblocking(0)
-            try:
-                data = self.socket.recv(1024)
-            except socket.error as e:
-                err = e.args[0]
-                if err == errno.EAGAIN or err == errno.EWOULDBLOCK:
-                    return None
-                raise e
-            if data == "":
-                print(self.buffer, '<')
-                self.close()
-                raise Disconnected("disconnected")
-            self.socket.setblocking(1)
-            data = data.split(b'\n')
-            self.buffer[0] += data[0]
-            for p in data[1:]:
-                self.buffer.append(p)
-        line = self.buffer.pop(0).decode('ascii')
-        if len(line) > 0 and line[-1] == '\r':
-            line = line[0:-1]
-        self.circular.put("<", line)
-        # print '<', line
-        if self.filter_ascii:
-            # replace non ascii characters
-            line = re.sub(r'[^\x00-\x7E]+','?', line)
-        return line
-
-    def send_line(self, line):
-        if not self.connected:
-            logging.info("connect for cmd: %s", line)
-            self.connect()
-        # print '>', line
-        self.circular.put(">", line)
-        self.socket.sendall(line.encode('ascii') + b'\n')
-        
-    def close(self):
-        self.socket.close()
-        self.connected = False
-
-
-if __name__ == "__main__":
-    server = LineServer("localhost", 9999, LineHandler)
-    server.loop()
diff --git a/webserver.py b/webserver.py
index 9dc3f5f..10ed293 100755
--- a/webserver.py
+++ b/webserver.py
@@ -2,23 +2,15 @@ from gevent import monkey
 monkey.patch_all()
 import sys
 import time
-import os
 import signal
 import socket
 import traceback
 import logging
 import json
-from collections import deque
-from datetime import date, datetime
-import tcp_lineserver
 import gevent
 import gevent.pywsgi
 import gevent.queue
-from gevent.lock import RLock
 import flask
-import pprint
-import random
-import uuid
 import circularlog
 
 
@@ -91,7 +83,7 @@ def get_update(path=None):
                         lastmsg = time.time()
                     else:
                         gevent.sleep(pollinterval)
-        except (GeneratorExit, tcp_lineserver.Disconnected) as e:
+        except GeneratorExit as e:
             logging.info("except clause %r", repr(e))
             logging.info('CLOSED %s', client.id)
             print('CLOSE client')
@@ -132,6 +124,7 @@ def export():
     logging.info('GET %s %s', path, repr(kwargs))
     try:
         id = kwargs.pop('id')
+        print('export')
         client = instrument.clients[id]
         bytes = client.w_export(**kwargs)
         return flask.send_file(
@@ -234,15 +227,10 @@ def hostport_split(hostport):
     return (h[0], int(h[1]))
 
 
-def handle_pdb(sig, frame):
-    import pdb
-    print('PDB')
-    pdb.Pdb().set_trace(frame)
-
-
-def handle_term(sig, _):
-    server.stop()
-    server.close()
+# def handle_pdb(sig, frame):
+#     import pdb
+#     print('PDB')
+#     pdb.Pdb().set_trace(frame)
 
 
 def main(cls, **config):
@@ -255,7 +243,12 @@ def main(cls, **config):
     inst_name = config['instrument']
     instrument = cls(inst_name, config)
 
-    signal.signal(signal.SIGUSR1, handle_pdb)
+    # signal.signal(signal.SIGUSR1, handle_pdb)
+
+    def handle_term(sig, _):
+        server.stop()
+        server.close()
+
     signal.signal(signal.SIGTERM, handle_term)
 
     app.debug = True