Redesign keepserving

- Instead of listening for a pseudo-event, we periodically check whether client
replay, server replay or file reading is active.
- Adjust server replay not to
use tick.
- Adjust readfile to expose a command to check whether reading is in progress.

mitmproxy/addons/keepserving.py

@@ -1,3 +1,4 @@
+import asyncio
 from mitmproxy import ctx
 
 
@@ -12,6 +13,28 @@ class KeepServing:
             """
         )
 
-    def event_processing_complete(self):
-        if not ctx.master.options.keepserving:
+    def keepgoing(self) -> bool:
+        checks = [
+            "readfile.reading",
+            "replay.client.count",
+            "replay.server.count",
+        ]
+        return any([ctx.master.commands.call(c) for c in checks])
+
+    def shutdown(self):  # pragma: no cover
         ctx.master.shutdown()
+
+    async def watch(self):
+        while True:
+            await asyncio.sleep(0.1)
+            if not self.keepgoing():
+                self.shutdown()
+
+    def running(self):
+        opts = [
+            ctx.options.client_replay,
+            ctx.options.server_replay,
+            ctx.options.rfile,
+        ]
+        if any(opts) and not ctx.options.keepserving:
+            asyncio.get_event_loop().create_task(self.watch())

mitmproxy/addons/readfile.py

@@ -7,6 +7,7 @@ from mitmproxy import ctx
 from mitmproxy import exceptions
 from mitmproxy import flowfilter
 from mitmproxy import io
+from mitmproxy import command
 
 
 class ReadFile:
@@ -15,6 +16,7 @@ class ReadFile:
     """
     def __init__(self):
         self.filter = None
+        self.is_reading = False
 
     def load(self, loader):
         loader.add_option(
@@ -65,17 +67,23 @@ class ReadFile:
             raise exceptions.FlowReadException(str(e)) from e
 
     async def doread(self, rfile):
+        self.is_reading = True
         try:
             await self.load_flows_from_path(ctx.options.rfile)
         except exceptions.FlowReadException as e:
             raise exceptions.OptionsError(e) from e
         finally:
+            self.is_reading = False
             ctx.master.addons.trigger("processing_complete")
 
     def running(self):
         if ctx.options.rfile:
             asyncio.get_event_loop().create_task(self.doread(ctx.options.rfile))
 
+    @command.command("readfile.reading")
+    def reading(self) -> bool:
+        return self.is_reading
+
 
 class ReadFileStdin(ReadFile):
     """Support the special case of "-" for reading from stdin"""

mitmproxy/addons/serverplayback.py

@@ -13,8 +13,6 @@ import mitmproxy.types
 class ServerPlayback:
     def __init__(self):
         self.flowmap = {}
-        self.stop = False
-        self.final_flow = None
         self.configured = False
 
     def load(self, loader):
@@ -175,10 +173,6 @@ class ServerPlayback:
                 raise exceptions.OptionsError(str(e))
             self.load_flows(flows)
 
-    def tick(self):
-        if self.stop and not self.final_flow.live:
-            ctx.master.addons.trigger("processing_complete")
-
     def request(self, f):
         if self.flowmap:
             rflow = self.next_flow(f)
@@ -188,9 +182,6 @@ class ServerPlayback:
                 if ctx.options.server_replay_refresh:
                     response.refresh()
                 f.response = response
-                if not self.flowmap:
-                    self.final_flow = f
-                    self.stop = True
             elif ctx.options.server_replay_kill_extra:
                 ctx.log.warn(
                     "server_playback: killed non-replay request {}".format(

mitmproxy/master.py

@@ -127,10 +127,7 @@ class Master:
         """
         if not self.should_exit.is_set():
             self.should_exit.set()
-            asyncio.run_coroutine_threadsafe(
-                self._shutdown(),
-                loop = self.channel.loop,
-            )
+            asyncio.run_coroutine_threadsafe(self._shutdown(), loop = self.channel.loop)
 
     def _change_reverse_host(self, f):
         """

mitmproxy/tools/main.py

@@ -103,8 +103,6 @@ def run(
             server = proxy.server.DummyServer(pconf)
 
         master.server = server
-        master.addons.trigger("configure", opts.keys())
-        master.addons.trigger("tick")
         opts.update_known(**unknown)
         if args.options:
             print(optmanager.dump_defaults(opts))

test/mitmproxy/addons/test_keepserving.py

@@ -3,12 +3,48 @@ import pytest
 
 from mitmproxy.addons import keepserving
 from mitmproxy.test import taddons
+from mitmproxy import command
+
+
+class Dummy:
+    def __init__(self, val: bool):
+        self.val = val
+
+    def load(self, loader):
+        loader.add_option("client_replay", bool, self.val, "test")
+        loader.add_option("server_replay", bool, self.val, "test")
+        loader.add_option("rfile", bool, self.val, "test")
+
+    @command.command("readfile.reading")
+    def readfile(self) -> bool:
+        return self.val
+
+    @command.command("replay.client.count")
+    def creplay(self) -> int:
+        return 1 if self.val else 0
+
+    @command.command("replay.server.count")
+    def sreplay(self) -> int:
+        return 1 if self.val else 0
+
+
+class TKS(keepserving.KeepServing):
+    _is_shutdown = False
+
+    def shutdown(self):
+        self.is_shutdown = True
 
 
 @pytest.mark.asyncio
 async def test_keepserving():
-    ks = keepserving.KeepServing()
+    ks = TKS()
+    d = Dummy(True)
     with taddons.context(ks) as tctx:
-        ks.event_processing_complete()
-        asyncio.sleep(0.1)
-        assert tctx.master.should_exit.is_set()
+        tctx.master.addons.add(d)
+        ks.running()
+        assert ks.keepgoing()
+
+        d.val = False
+        assert not ks.keepgoing()
+        await asyncio.sleep(0.3)
+        assert ks.is_shutdown

test/mitmproxy/addons/test_readfile.py

@@ -51,6 +51,8 @@ class TestReadFile:
     async def test_read(self, tmpdir, data, corrupt_data):
         rf = readfile.ReadFile()
         with taddons.context(rf) as tctx:
+            assert not rf.reading()
+
             tf = tmpdir.join("tfile")
 
             with asynctest.patch('mitmproxy.master.Master.load_flow') as mck:

test/mitmproxy/addons/test_serverplayback.py

@@ -39,16 +39,6 @@ def test_config(tmpdir):
             tctx.configure(s, server_replay=[str(tmpdir)])
 
 
-def test_tick():
-    s = serverplayback.ServerPlayback()
-    with taddons.context(s) as tctx:
-        s.stop = True
-        s.final_flow = tflow.tflow()
-        s.final_flow.live = False
-        s.tick()
-        assert tctx.master.has_event("processing_complete")
-
-
 def test_server_playback():
     sp = serverplayback.ServerPlayback()
     with taddons.context(sp) as tctx:
@@ -349,14 +339,6 @@ def test_server_playback_full():
         s.request(tf)
         assert not tf.response
 
-        assert not s.stop
-        s.tick()
-        assert not s.stop
-
-        tf = tflow.tflow()
-        s.request(tflow.tflow())
-        assert s.stop
-
 
 def test_server_playback_kill():
     s = serverplayback.ServerPlayback()

test/mitmproxy/tools/console/test_statusbar.py

@@ -30,6 +30,7 @@ def test_statusbar(monkeypatch):
     m.options.update(view_order='url', console_focus_follow=True)
     monkeypatch.setattr(m.addons.get("clientplayback"), "count", lambda: 42)
     monkeypatch.setattr(m.addons.get("serverplayback"), "count", lambda: 42)
+    monkeypatch.setattr(statusbar.StatusBar, "refresh", lambda x: None)
 
     bar = statusbar.StatusBar(m)  # this already causes a redraw
     assert bar.ib._w