Create our own TCP server class.

We're going to need more control for advanced features and speed, and we can
also ditch some of the idiocies in the SocketServer module.

1 files changed, 88 insertions, 0 deletions

diff --git a/libmproxy/tcpserver.py b/libmproxy/tcpserver.py
new file mode 100644
index 00000000..bf7ed0b4
--- /dev/null
+++ b/libmproxy/tcpserver.py
@@ -0,0 +1,88 @@
+import select, socket, threading
+
+class BaseHandler:
+    rbufsize = -1
+    wbufsize = 0
+    def __init__(self, connection, client_address, server):
+        self.connection = connection
+        self.rfile = self.connection.makefile('rb', self.rbufsize)
+        self.wfile = self.connection.makefile('wb', self.wbufsize)
+
+        self.client_address = client_address
+        self.server = server
+        self.handle()
+        self.finish()
+
+    def finish(self):
+        try:
+            if not getattr(self.wfile, "closed", False):
+                self.wfile.flush()
+            self.connection.close()
+            self.wfile.close()
+            self.rfile.close()
+        except IOError:
+            pass
+
+    def handle(self):
+        raise NotImplementedError
+
+
+class TCPServer:
+    request_queue_size = 20
+    def __init__(self, server_address):
+        self.server_address = server_address
+        self.__is_shut_down = threading.Event()
+        self.__shutdown_request = False
+        self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        self.socket.bind(self.server_address)
+        self.server_address = self.socket.getsockname()
+        self.socket.listen(self.request_queue_size)
+
+    def fileno(self):
+        return self.socket.fileno()
+
+    def request_thread(self, request, client_address):
+        try:
+            self.handle_connection(request, client_address)
+            request.close()
+        except:
+            self.handle_error(request, client_address)
+            request.close()
+
+    def serve_forever(self, poll_interval=0.5):
+        self.__is_shut_down.clear()
+        try:
+            while not self.__shutdown_request:
+                r, w, e = select.select([self], [], [], poll_interval)
+                if self in r:
+                    try:
+                        request, client_address = self.socket.accept()
+                    except socket.error:
+                        return
+                    try:
+                        t = threading.Thread(target = self.request_thread,
+                                             args = (request, client_address))
+                        t.setDaemon (1)
+                        t.start()
+                    except:
+                        self.handle_error(request, client_address)
+                        request.close()
+        finally:
+            self.__shutdown_request = False
+            self.__is_shut_down.set()
+
+    def shutdown(self):
+        self.__shutdown_request = True
+        self.__is_shut_down.wait()
+
+    def handle_error(self, request, client_address):
+        print '-'*40
+        print 'Exception happened during processing of request from',
+        print client_address
+        import traceback
+        traceback.print_exc() # XXX But this goes to stderr!
+        print '-'*40
+
+    def handle_connection(self, request, client_address):
+        raise NotImplementedError