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import os
import importlib
import time
import sys
import typing
from mitmproxy import addonmanager
from mitmproxy import exceptions
from mitmproxy import flow
from mitmproxy import command
from mitmproxy import eventsequence
from mitmproxy import ctx
def load_script(actx, path):
if not os.path.exists(path):
ctx.log.info("No such file: %s" % path)
return
loader = importlib.machinery.SourceFileLoader(os.path.basename(path), path)
try:
oldpath = sys.path
sys.path.insert(0, os.path.dirname(path))
with addonmanager.safecall():
m = loader.load_module()
if not getattr(m, "name", None):
m.name = path
return m
finally:
sys.path[:] = oldpath
class Script:
"""
An addon that manages a single script.
"""
ReloadInterval = 2
def __init__(self, path):
self.name = "scriptmanager:" + path
self.path = path
self.fullpath = os.path.expanduser(path)
self.ns = None
self.last_load = 0
self.last_mtime = 0
if not os.path.isfile(self.fullpath):
raise exceptions.OptionsError("No such script: %s" % path)
@property
def addons(self):
return [self.ns] if self.ns else []
def tick(self):
if time.time() - self.last_load > self.ReloadInterval:
try:
mtime = os.stat(self.fullpath).st_mtime
except FileNotFoundError:
scripts = ctx.options.scripts
scripts.remove(self.path)
ctx.options.update(scripts=scripts)
return
if mtime > self.last_mtime:
ctx.log.info("Loading script: %s" % self.path)
if self.ns:
ctx.master.addons.remove(self.ns)
del sys.modules[self.ns.__name__]
self.ns = load_script(ctx, self.fullpath)
if self.ns:
# We're already running, so we have to explicitly register and
# configure the addon
ctx.master.addons.register(self.ns)
ctx.master.addons.invoke_addon(self.ns, "running")
ctx.master.addons.invoke_addon(
self.ns,
"configure",
ctx.options.keys()
)
self.last_load = time.time()
self.last_mtime = mtime
class ScriptLoader:
"""
An addon that manages loading scripts from options.
"""
def __init__(self):
self.is_running = False
self.addons = []
def running(self):
self.is_running = True
@command.command("script.run")
def script_run(self, flows: typing.Sequence[flow.Flow], path: str) -> None:
"""
Run a script on the specified flows. The script is loaded with
default options, and all lifecycle events for each flow are
simulated.
"""
try:
s = Script(path)
l = addonmanager.Loader(ctx.master)
ctx.master.addons.invoke_addon(s, "load", l)
ctx.master.addons.invoke_addon(s, "configure", ctx.options.keys())
# Script is loaded on the first tick
ctx.master.addons.invoke_addon(s, "tick")
for f in flows:
for evt, arg in eventsequence.iterate(f):
ctx.master.addons.invoke_addon(s, evt, arg)
except exceptions.OptionsError as e:
raise exceptions.CommandError("Error running script: %s" % e) from e
def configure(self, updated):
if "scripts" in updated:
for s in ctx.options.scripts:
if ctx.options.scripts.count(s) > 1:
raise exceptions.OptionsError("Duplicate script: %s" % s)
for a in self.addons[:]:
if a.path not in ctx.options.scripts:
ctx.log.info("Un-loading script: %s" % a.name)
ctx.master.addons.remove(a)
self.addons.remove(a)
# The machinations below are to ensure that:
# - Scripts remain in the same order
# - Scripts are not initialized un-necessarily. If only a
# script's order in the script list has changed, it is just
# moved.
current = {}
for a in self.addons:
current[a.path] = a
ordered = []
newscripts = []
for s in ctx.options.scripts:
if s in current:
ordered.append(current[s])
else:
sc = Script(s)
ordered.append(sc)
newscripts.append(sc)
self.addons = ordered
for s in newscripts:
ctx.master.addons.register(s)
if self.is_running:
# If we're already running, we configure and tell the addon
# we're up and running.
ctx.master.addons.invoke_addon(s, "running")
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