From 2b4af8d4756bc4eef613ec2cdf81a97d3952150b Mon Sep 17 00:00:00 2001
From: Maximilian Hils <git@maximilianhils.com>
Date: Thu, 13 Jun 2013 16:04:04 +0200
Subject: [PATCH] add support for multiple scripts and script arguments. refs
 #76

---
 doc-src/scripting/inlinescripts.html |  2 +-
 examples/stub.py                     |  3 +-
 libmproxy/cmdline.py                 |  9 +++--
 libmproxy/console/__init__.py        |  2 +-
 libmproxy/dump.py                    | 10 +++---
 libmproxy/flow.py                    | 53 ++++++++++++++--------------
 libmproxy/script.py                  | 20 ++++++-----
 test/scripts/a.py                    |  8 +++++
 test/scripts/starterr.py             |  2 +-
 test/test_cmdline.py                 | 13 +++++++
 test/test_flow.py                    | 21 +++++++----
 test/test_script.py                  | 21 ++++++-----
 12 files changed, 101 insertions(+), 63 deletions(-)

diff --git a/doc-src/scripting/inlinescripts.html b/doc-src/scripting/inlinescripts.html
index 2d53df80c..c9e188fcb 100644
--- a/doc-src/scripting/inlinescripts.html
+++ b/doc-src/scripting/inlinescripts.html
@@ -25,7 +25,7 @@ The new header will be added to all responses passing through the proxy.
 
 ## Events
 
-### start(ScriptContext)
+### start(ScriptContext, argv)
 
 Called once on startup, before any other events.
 
diff --git a/examples/stub.py b/examples/stub.py
index 314111459..42b2935a9 100644
--- a/examples/stub.py
+++ b/examples/stub.py
@@ -1,8 +1,7 @@
 """
     This is a script stub, with definitions for all events.
 """
-
-def start(ctx):
+def start(ctx, argv):
     """
         Called once on script startup, before any other events.
     """
diff --git a/libmproxy/cmdline.py b/libmproxy/cmdline.py
index b76792cf2..75f28bcab 100644
--- a/libmproxy/cmdline.py
+++ b/libmproxy/cmdline.py
@@ -16,6 +16,8 @@
 import proxy
 import re, filt
 import argparse
+import shlex
+import os
 
 class ParseException(Exception): pass
 class OptionException(Exception): pass
@@ -151,7 +153,7 @@ def get_common_options(options):
         replacements = reps,
         setheaders = setheaders,
         server_replay = options.server_replay,
-        script = options.script,
+        scripts = options.scripts,
         stickycookie = stickycookie,
         stickyauth = stickyauth,
         showhost = options.showhost,
@@ -209,8 +211,9 @@ def common_options(parser):
     )
     parser.add_argument(
         "-s",
-        action="store", dest="script", default=None,
-        help="Run a script."
+        action="append", type=lambda x: shlex.split(x,posix=(os.name != "nt")), dest="scripts", default=[],
+        metavar='"script.py --bar"',
+        help="Run a script. Surround with quotes to pass script arguments. Can be passed multiple times."
     )
     parser.add_argument(
         "-t",
diff --git a/libmproxy/console/__init__.py b/libmproxy/console/__init__.py
index ba699d335..bb57ba26d 100644
--- a/libmproxy/console/__init__.py
+++ b/libmproxy/console/__init__.py
@@ -460,7 +460,7 @@ class ConsoleMaster(flow.FlowMaster):
             self._run_script_method("response", s, f)
         if f.error:
             self._run_script_method("error", s, f)
-        s.run("done")
+        s.unload()
         self.refresh_flow(f)
         self.state.last_script = path
 
diff --git a/libmproxy/dump.py b/libmproxy/dump.py
index b1022ef52..a4846da76 100644
--- a/libmproxy/dump.py
+++ b/libmproxy/dump.py
@@ -36,7 +36,7 @@ class Options(object):
         "rheaders",
         "setheaders",
         "server_replay",
-        "script",
+        "scripts",
         "showhost",
         "stickycookie",
         "stickyauth",
@@ -121,8 +121,8 @@ class DumpMaster(flow.FlowMaster):
                 not options.keepserving
             )
 
-        if options.script:
-            err = self.load_script(options.script)
+        for script_argv in options.scripts:
+            err = self.load_script(script_argv)
             if err:
                 raise DumpError(err)
 
@@ -230,8 +230,8 @@ class DumpMaster(flow.FlowMaster):
 
     def run(self):  # pragma: no cover
         if self.o.rfile and not self.o.keepserving:
-            if self.script:
-                self.load_script(None)
+            for script in self.scripts:
+                self.unload_script(script)
             return
         try:
             return flow.FlowMaster.run(self)
diff --git a/libmproxy/flow.py b/libmproxy/flow.py
index 10c5da5de..61b2a2411 100644
--- a/libmproxy/flow.py
+++ b/libmproxy/flow.py
@@ -1357,7 +1357,7 @@ class FlowMaster(controller.Master):
         self.server_playback = None
         self.client_playback = None
         self.kill_nonreplay = False
-        self.script = None
+        self.scripts = []
         self.pause_scripts = False
 
         self.stickycookie_state = False
@@ -1381,37 +1381,43 @@ class FlowMaster(controller.Master):
         """
         pass
 
-    def get_script(self, path):
+    def get_script(self, script_argv):
         """
             Returns an (error, script) tuple.
         """
-        s = script.Script(path, ScriptContext(self))
+        s = script.Script(script_argv, ScriptContext(self))
         try:
             s.load()
         except script.ScriptError, v:
             return (v.args[0], None)
-        ret = s.run("start")
-        if not ret[0] and ret[1]:
-            return ("Error in script start:\n\n" + ret[1][1], None)
         return (None, s)
 
-    def load_script(self, path):
+    def unload_script(self,script):
+        script.unload()
+        self.scripts.remove(script)
+
+    def load_script(self, script_argv):
         """
             Loads a script. Returns an error description if something went
-            wrong. If path is None, the current script is terminated.
+            wrong.
         """
-        if path is None:
-            self.run_script_hook("done")
-            self.script = None
+        r = self.get_script(script_argv)
+        if r[0]:
+            return r[0]
         else:
-            r = self.get_script(path)
-            if r[0]:
-                return r[0]
-            else:
-                if self.script:
-                    self.run_script_hook("done")
-                self.script = r[1]
+            self.scripts.append(r[1])
 
+    def run_single_script_hook(self, script, name, *args, **kwargs):
+        if script and not self.pause_scripts:
+            ret = script.run(name, *args, **kwargs)
+            if not ret[0] and ret[1]:
+                e = "Script error:\n" + ret[1][1]
+                self.add_event(e, "error")
+
+    def run_script_hook(self, name, *args, **kwargs):
+        for script in self.scripts:
+            self.run_single_script_hook(script, name, *args, **kwargs)
+      
     def set_stickycookie(self, txt):
         if txt:
             flt = filt.parse(txt)
@@ -1561,13 +1567,6 @@ class FlowMaster(controller.Master):
             if block:
                 rt.join()
 
-    def run_script_hook(self, name, *args, **kwargs):
-        if self.script and not self.pause_scripts:
-            ret = self.script.run(name, *args, **kwargs)
-            if not ret[0] and ret[1]:
-                e = "Script error:\n" + ret[1][1]
-                self.add_event(e, "error")
-
     def handle_clientconnect(self, cc):
         self.run_script_hook("clientconnect", cc)
         cc.reply()
@@ -1609,8 +1608,8 @@ class FlowMaster(controller.Master):
         return f
 
     def shutdown(self):
-        if self.script:
-            self.load_script(None)
+        for script in self.scripts:
+            self.unload_script(script)
         controller.Master.shutdown(self)
         if self.stream:
             for i in self.state._flow_list:
diff --git a/libmproxy/script.py b/libmproxy/script.py
index 4ffac71b4..4676672bd 100644
--- a/libmproxy/script.py
+++ b/libmproxy/script.py
@@ -23,12 +23,12 @@ class Script:
     """
         The instantiator should do something along this vein:
 
-            s = Script(path, master)
+            s = Script(argv, master)
             s.load()
-            s.run("start")
     """
-    def __init__(self, path, ctx):
-        self.path, self.ctx = path, ctx
+    def __init__(self, argv, ctx):
+        self.argv = argv
+        self.ctx = ctx
         self.ns = None
 
     def load(self):
@@ -38,17 +38,21 @@ class Script:
             Raises ScriptError on failure, with argument equal to an error
             message that may be a formatted traceback.
         """
-        path = os.path.expanduser(self.path)
+        path = os.path.expanduser(self.argv[0])
         if not os.path.exists(path):
-            raise ScriptError("No such file: %s"%self.path)
+            raise ScriptError("No such file: %s" % path)
         if not os.path.isfile(path):
-            raise ScriptError("Not a file: %s"%self.path)
+            raise ScriptError("Not a file: %s" % path)
         ns = {}
         try:
             execfile(path, ns, ns)
+            self.ns = ns
+            self.run("start", self.argv)
         except Exception, v:
             raise ScriptError(traceback.format_exc(v))
-        self.ns = ns
+
+    def unload(self):
+        return self.run("done")
 
     def run(self, name, *args, **kwargs):
         """
diff --git a/test/scripts/a.py b/test/scripts/a.py
index 0a21b6193..31cdaf0cf 100644
--- a/test/scripts/a.py
+++ b/test/scripts/a.py
@@ -1,5 +1,13 @@
+import argparse
+
+parser = argparse.ArgumentParser()
+parser.add_argument('--var')
 
 var = 0
+def __init__(ctx, argv):
+    global var
+    var = parser.parse_args(argv).var
+
 def here(ctx):
     global var
     var += 1
diff --git a/test/scripts/starterr.py b/test/scripts/starterr.py
index 456fecc0e..b217bdfee 100644
--- a/test/scripts/starterr.py
+++ b/test/scripts/starterr.py
@@ -1,3 +1,3 @@
 
-def start(ctx):
+def start(ctx, argv):
     raise ValueError
diff --git a/test/test_cmdline.py b/test/test_cmdline.py
index e1c5c88d7..92e2adbd1 100644
--- a/test/test_cmdline.py
+++ b/test/test_cmdline.py
@@ -1,6 +1,7 @@
 import argparse
 from libmproxy import cmdline
 import tutils
+import os.path
 
 
 def test_parse_replace_hook():
@@ -39,6 +40,18 @@ def test_parse_setheaders():
     x = cmdline.parse_setheader("/foo/bar/voing")
     assert x == ("foo", "bar", "voing")
 
+def test_shlex():
+    """
+    shlex.split assumes posix=True by default, we do manual detection for windows.
+    Test whether script paths are parsed correctly
+    """
+    absfilepath = os.path.normcase(os.path.abspath(__file__))
+
+    parser = argparse.ArgumentParser()
+    cmdline.common_options(parser)
+    opts = parser.parse_args(args=["-s",absfilepath])
+    
+    assert os.path.isfile(opts.scripts[0][0])
 
 def test_common():
     parser = argparse.ArgumentParser()
diff --git a/test/test_flow.py b/test/test_flow.py
index 718f3551f..085801af0 100644
--- a/test/test_flow.py
+++ b/test/test_flow.py
@@ -544,9 +544,11 @@ class TestFlowMaster:
         fm = flow.FlowMaster(None, s)
         assert not fm.load_script(tutils.test_data.path("scripts/a.py"))
         assert not fm.load_script(tutils.test_data.path("scripts/a.py"))
-        assert not fm.load_script(None)
+        assert not fm.unload_script(fm.scripts[0])
+        assert not fm.unload_script(fm.scripts[0])
         assert fm.load_script("nonexistent")
         assert "ValueError" in fm.load_script(tutils.test_data.path("scripts/starterr.py"))
+        assert len(fm.scripts) == 0
 
     def test_replay(self):
         s = flow.State()
@@ -572,20 +574,27 @@ class TestFlowMaster:
         assert not fm.load_script(tutils.test_data.path("scripts/all.py"))
         req = tutils.treq()
         fm.handle_clientconnect(req.client_conn)
-        assert fm.script.ns["log"][-1] == "clientconnect"
+        assert fm.scripts[0].ns["log"][-1] == "clientconnect"
         f = fm.handle_request(req)
-        assert fm.script.ns["log"][-1] == "request"
+        assert fm.scripts[0].ns["log"][-1] == "request"
         resp = tutils.tresp(req)
         fm.handle_response(resp)
-        assert fm.script.ns["log"][-1] == "response"
+        assert fm.scripts[0].ns["log"][-1] == "response"
+        #load second script
+        assert not fm.load_script(tutils.test_data.path("scripts/all.py"))
+        assert len(fm.scripts) == 2
         dc = flow.ClientDisconnect(req.client_conn)
         dc.reply = controller.DummyReply()
         fm.handle_clientdisconnect(dc)
-        assert fm.script.ns["log"][-1] == "clientdisconnect"
+        assert fm.scripts[0].ns["log"][-1] == "clientdisconnect"
+        assert fm.scripts[1].ns["log"][-1] == "clientdisconnect"
+        #unload first script
+        fm.unload_script(fm.scripts[0])
+        assert len(fm.scripts) == 1
         err = flow.Error(f.request, "msg")
         err.reply = controller.DummyReply()
         fm.handle_error(err)
-        assert fm.script.ns["log"][-1] == "error"
+        assert fm.scripts[0].ns["log"][-1] == "error"
 
     def test_duplicate_flow(self):
         s = flow.State()
diff --git a/test/test_script.py b/test/test_script.py
index 407c9b4b2..9033c4fca 100644
--- a/test/test_script.py
+++ b/test/test_script.py
@@ -1,5 +1,7 @@
 from libmproxy import script, flow
 import tutils
+import shlex
+import os
 
 class TestScript:
     def test_simple(self):
@@ -7,11 +9,12 @@ class TestScript:
         fm = flow.FlowMaster(None, s)
         ctx = flow.ScriptContext(fm)
 
-        p = script.Script(tutils.test_data.path("scripts/a.py"), ctx)
+        p = script.Script(shlex.split(tutils.test_data.path("scripts/a.py")+" --var 40", posix=(os.name != "nt")), ctx)
         p.load()
+
         assert "here" in p.ns
-        assert p.run("here") == (True, 1)
-        assert p.run("here") == (True, 2)
+        assert p.run("here") == (True, 41)
+        assert p.run("here") == (True, 42)
 
         ret = p.run("errargs")
         assert not ret[0]
@@ -19,12 +22,12 @@ class TestScript:
 
         # Check reload
         p.load()
-        assert p.run("here") == (True, 1)
+        assert p.run("here") == (True, 41)
 
     def test_duplicate_flow(self):
         s = flow.State()
         fm = flow.FlowMaster(None, s)
-        fm.load_script(tutils.test_data.path("scripts/duplicate_flow.py"))
+        fm.load_script([tutils.test_data.path("scripts/duplicate_flow.py")])
         r = tutils.treq()
         fm.handle_request(r)
         assert fm.state.flow_count() == 2
@@ -37,25 +40,25 @@ class TestScript:
         ctx = flow.ScriptContext(fm)
 
 
-        s = script.Script("nonexistent", ctx)
+        s = script.Script(["nonexistent"], ctx)
         tutils.raises(
             "no such file",
             s.load
         )
 
-        s = script.Script(tutils.test_data.path("scripts"), ctx)
+        s = script.Script([tutils.test_data.path("scripts")], ctx)
         tutils.raises(
             "not a file",
             s.load
         )
 
-        s = script.Script(tutils.test_data.path("scripts/syntaxerr.py"), ctx)
+        s = script.Script([tutils.test_data.path("scripts/syntaxerr.py")], ctx)
         tutils.raises(
             script.ScriptError,
             s.load
         )
 
-        s = script.Script(tutils.test_data.path("scripts/loaderr.py"), ctx)
+        s = script.Script([tutils.test_data.path("scripts/loaderr.py")], ctx)
         tutils.raises(
             script.ScriptError,
             s.load