mitmproxy/libmproxy/console/__init__.py

from __future__ import absolute_import
import mailcap, mimetypes, tempfile, os, subprocess, glob, time, shlex, stat
import os.path, sys, weakref, traceback
import urwid
from .. import controller, utils, flow, script, proxy
from . import flowlist, flowview, help, common, grideditor, palettes, contentview, flowdetailview

EVENTLOG_SIZE = 500


class Stop(Exception): pass


class _PathCompleter:
    def __init__(self, _testing=False):
        """
            _testing: disables reloading of the lookup table to make testing possible.
        """
        self.lookup, self.offset = None, None
        self.final = None
        self._testing = _testing

    def reset(self):
        self.lookup = None
        self.offset = -1

    def complete(self, txt):
        """
            Returns the next completion for txt, or None if there is no completion.
        """
        path = os.path.expanduser(txt)
        if not self.lookup:
            if not self._testing:
                # Lookup is a set of (display value, actual value) tuples.
                self.lookup = []
                if os.path.isdir(path):
                    files = glob.glob(os.path.join(path, "*"))
                    prefix = txt
                else:
                    files = glob.glob(path+"*")
                    prefix = os.path.dirname(txt)
                prefix = prefix or "./"
                for f in files:
                    display = os.path.join(prefix, os.path.basename(f))
                    if os.path.isdir(f):
                        display += "/"
                    self.lookup.append((display, f))
            if not self.lookup:
                self.final = path
                return path
            self.lookup.sort()
            self.offset = -1
            self.lookup.append((txt, txt))
        self.offset += 1
        if self.offset >= len(self.lookup):
            self.offset = 0
        ret = self.lookup[self.offset]
        self.final = ret[1]
        return ret[0]

#begin nocover

class PathEdit(urwid.Edit, _PathCompleter):
    def __init__(self, *args, **kwargs):
        urwid.Edit.__init__(self, *args, **kwargs)
        _PathCompleter.__init__(self)

    def keypress(self, size, key):
        if key == "tab":
            comp = self.complete(self.get_edit_text())
            self.set_edit_text(comp)
            self.set_edit_pos(len(comp))
        else:
            self.reset()
        return urwid.Edit.keypress(self, size, key)


class ActionBar(common.WWrap):
    def __init__(self):
        self.message("")

    def selectable(self):
        return True

    def path_prompt(self, prompt, text):
        self.expire = None
        self.w = PathEdit(prompt, text)

    def prompt(self, prompt, text = ""):
        self.expire = None
        # A (partial) workaround for this Urwid issue:
        # https://github.com/Nic0/tyrs/issues/115
        # We can remove it once veryone is beyond 1.0.1
        if isinstance(prompt, basestring):
            prompt = unicode(prompt)
        self.w = urwid.Edit(prompt, text or "")

    def message(self, message, expire=None):
        self.expire = expire
        self.w = urwid.Text(message)


class StatusBar(common.WWrap):
    def __init__(self, master, helptext):
        self.master, self.helptext = master, helptext
        self.ab = ActionBar()
        self.ib = common.WWrap(urwid.Text(""))
        self.w = urwid.Pile([self.ib, self.ab])

    def get_status(self):
        r = []

        if self.master.setheaders.count():
            r.append("[")
            r.append(("heading_key", "H"))
            r.append("eaders]")
        if self.master.replacehooks.count():
            r.append("[")
            r.append(("heading_key", "R"))
            r.append("eplacing]")
        if self.master.client_playback:
            r.append("[")
            r.append(("heading_key", "cplayback"))
            r.append(":%s to go]"%self.master.client_playback.count())
        if self.master.server_playback:
            r.append("[")
            r.append(("heading_key", "splayback"))
            if self.master.nopop:
                r.append(":%s in file]"%self.master.server_playback.count())
            else:
                r.append(":%s to go]"%self.master.server_playback.count())
        if self.master.get_ignore():
            r.append("[")
            r.append(("heading_key", "I"))
            r.append("gnore:%d]"%len(self.master.get_ignore()))
        if self.master.state.intercept_txt:
            r.append("[")
            r.append(("heading_key", "i"))
            r.append(":%s]"%self.master.state.intercept_txt)
        if self.master.state.limit_txt:
            r.append("[")
            r.append(("heading_key", "l"))
            r.append(":%s]"%self.master.state.limit_txt)
        if self.master.stickycookie_txt:
            r.append("[")
            r.append(("heading_key", "t"))
            r.append(":%s]"%self.master.stickycookie_txt)
        if self.master.stickyauth_txt:
            r.append("[")
            r.append(("heading_key", "u"))
            r.append(":%s]"%self.master.stickyauth_txt)
        if self.master.state.default_body_view.name != "Auto":
            r.append("[")
            r.append(("heading_key", "M"))
            r.append(":%s]"%self.master.state.default_body_view.name)

        opts = []
        if self.master.anticache:
            opts.append("anticache")
        if self.master.anticomp:
            opts.append("anticomp")
        if self.master.showhost:
            opts.append("showhost")
        if not self.master.refresh_server_playback:
            opts.append("norefresh")
        if self.master.killextra:
            opts.append("killextra")
        if self.master.server.config.no_upstream_cert:
            opts.append("no-upstream-cert")
        if self.master.state.follow_focus:
            opts.append("following")
        if self.master.stream_large_bodies:
            opts.append("stream:%s" % utils.pretty_size(self.master.stream_large_bodies.max_size))

        if opts:
            r.append("[%s]"%(":".join(opts)))

        if self.master.server.config.mode in ["reverse", "upstream"]:
            dst = self.master.server.config.mode.dst
            scheme = "https" if dst[0] else "http"
            if dst[1] != dst[0]:
                scheme += "2https" if dst[1] else "http"
            r.append("[dest:%s]"%utils.unparse_url(scheme, *dst[2:]))
        if self.master.scripts:
            r.append("[")
            r.append(("heading_key", "s"))
            r.append("cripts:%s]"%len(self.master.scripts))
        # r.append("[lt:%0.3f]"%self.master.looptime)

        if self.master.stream:
            r.append("[W:%s]"%self.master.stream_path)

        return r

    def redraw(self):
        if self.ab.expire and time.time() > self.ab.expire:
            self.message("")

        fc = self.master.state.flow_count()
        if self.master.state.focus is None:
            offset = 0
        else:
            offset = min(self.master.state.focus + 1, fc)
        t = [
            ('heading', ("[%s/%s]"%(offset, fc)).ljust(9))
        ]

        if self.master.server.bound:
            host = self.master.server.address.host
            if host == "0.0.0.0":
                host = "*"
            boundaddr = "[%s:%s]"%(host, self.master.server.address.port)
        else:
            boundaddr = ""
        t.extend(self.get_status())
        status = urwid.AttrWrap(urwid.Columns([
            urwid.Text(t),
            urwid.Text(
                [
                    self.helptext,
                    boundaddr
                ],
                align="right"
            ),
        ]), "heading")
        self.ib.set_w(status)

    def update(self, text):
        self.helptext = text
        self.redraw()
        self.master.drawscreen()

    def selectable(self):
        return True

    def get_edit_text(self):
        return self.ab.w.get_edit_text()

    def path_prompt(self, prompt, text):
        return self.ab.path_prompt(prompt, text)

    def prompt(self, prompt, text = ""):
        self.ab.prompt(prompt, text)

    def message(self, msg, expire=None):
        if expire:
            expire = time.time() + float(expire)/1000
        self.ab.message(msg, expire)
        self.master.drawscreen()


#end nocover

class ConsoleState(flow.State):
    def __init__(self):
        flow.State.__init__(self)
        self.focus = None
        self.follow_focus = None
        self.default_body_view = contentview.get("Auto")

        self.view_mode = common.VIEW_LIST
        self.view_flow_mode = common.VIEW_FLOW_REQUEST

        self.last_script = ""
        self.last_saveload = ""
        self.flowsettings = weakref.WeakKeyDictionary()

    def add_flow_setting(self, flow, key, value):
        d = self.flowsettings.setdefault(flow, {})
        d[key] = value

    def get_flow_setting(self, flow, key, default=None):
        d = self.flowsettings.get(flow, {})
        return d.get(key, default)

    def add_request(self, f):
        flow.State.add_request(self, f)
        if self.focus is None:
            self.set_focus(0)
        elif self.follow_focus:
            self.set_focus(len(self.view) - 1)
        return f

    def add_response(self, resp):
        f = flow.State.add_response(self, resp)
        if self.focus is None:
            self.set_focus(0)
        return f

    def set_limit(self, limit):
        ret = flow.State.set_limit(self, limit)
        self.set_focus(self.focus)
        return ret

    def get_focus(self):
        if not self.view or self.focus is None:
            return None, None
        return self.view[self.focus], self.focus

    def set_focus(self, idx):
        if self.view:
            if idx >= len(self.view):
                idx = len(self.view) - 1
            elif idx < 0:
                idx = 0
            self.focus = idx

    def set_focus_flow(self, f):
        self.set_focus(self.view.index(f))

    def get_from_pos(self, pos):
        if len(self.view) <= pos or pos < 0:
            return None, None
        return self.view[pos], pos

    def get_next(self, pos):
        return self.get_from_pos(pos+1)

    def get_prev(self, pos):
        return self.get_from_pos(pos-1)

    def delete_flow(self, f):
        if f in self.view and self.view.index(f) <= self.focus:
            self.focus -= 1
        if self.focus < 0:
            self.focus = None
        ret = flow.State.delete_flow(self, f)
        self.set_focus(self.focus)
        return ret



class Options(object):
    attributes = [
        "app",
        "app_domain",
        "app_ip",
        "anticache",
        "anticomp",
        "client_replay",
        "eventlog",
        "keepserving",
        "kill",
        "intercept",
        "no_server",
        "refresh_server_playback",
        "rfile",
        "scripts",
        "showhost",
        "replacements",
        "rheaders",
        "setheaders",
        "server_replay",
        "stickycookie",
        "stickyauth",
        "stream_large_bodies",
        "verbosity",
        "wfile",
        "nopop",
        "palette",
    ]
    def __init__(self, **kwargs):
        for k, v in kwargs.items():
            setattr(self, k, v)
        for i in self.attributes:
            if not hasattr(self, i):
                setattr(self, i, None)


#begin nocover


class ConsoleMaster(flow.FlowMaster):
    palette = []
    def __init__(self, server, options):
        flow.FlowMaster.__init__(self, server, ConsoleState())
        self.looptime = 0
        self.stream_path = None
        self.options = options

        for i in options.replacements:
            self.replacehooks.add(*i)

        for i in options.setheaders:
            self.setheaders.add(*i)

        self.flow_list_walker = None
        self.set_palette(options.palette)

        r = self.set_intercept(options.intercept)
        if r:
            print >> sys.stderr, "Intercept error:", r
            sys.exit(1)

        r = self.set_stickycookie(options.stickycookie)
        if r:
            print >> sys.stderr, "Sticky cookies error:", r
            sys.exit(1)

        r = self.set_stickyauth(options.stickyauth)
        if r:
            print >> sys.stderr, "Sticky auth error:", r
            sys.exit(1)

        self.set_stream_large_bodies(options.stream_large_bodies)

        self.refresh_server_playback = options.refresh_server_playback
        self.anticache = options.anticache
        self.anticomp = options.anticomp
        self.killextra = options.kill
        self.rheaders = options.rheaders
        self.nopop = options.nopop
        self.showhost = options.showhost

        self.eventlog = options.eventlog
        self.eventlist = urwid.SimpleListWalker([])

        if options.client_replay:
            self.client_playback_path(options.client_replay)

        if options.server_replay:
            self.server_playback_path(options.server_replay)

        if options.scripts:
            for i in options.scripts:
                err = self.load_script(i)
                if err:
                    print >> sys.stderr, "Script load error:", err
                    sys.exit(1)

        if options.wfile:
            err = self.start_stream(options.wfile)
            if err:
                print >> sys.stderr, "Script load error:", err
                sys.exit(1)

        if options.app:
            self.start_app(self.options.app_host, self.options.app_port)

    def start_stream(self, path):
        path = os.path.expanduser(path)
        try:
            f = file(path, "wb")
            flow.FlowMaster.start_stream(self, f, None)
        except IOError, v:
            return str(v)
        self.stream_path = path

    def _run_script_method(self, method, s, f):
        status, val = s.run(method, f)
        if val:
            if status:
                self.add_event("Method %s return: %s"%(method, val), "debug")
            else:
                self.add_event("Method %s error: %s"%(method, val[1]), "error")

    def run_script_once(self, command, f):
        if not command:
            return
        self.add_event("Running script on flow: %s"%command, "debug")

        try:
            s = script.Script(command, self)
        except script.ScriptError, v:
            self.statusbar.message("Error loading script.")
            self.add_event("Error loading script:\n%s"%v.args[0], "error")
            return

        if f.request:
            self._run_script_method("request", s, f)
        if f.response:
            self._run_script_method("response", s, f)
        if f.error:
            self._run_script_method("error", s, f)
        s.unload()
        self.refresh_flow(f)
        self.state.last_script = command

    def set_script(self, command):
        if not command:
            return
        ret = self.load_script(command)
        if ret:
            self.statusbar.message(ret)
        self.state.last_script = command

    def toggle_eventlog(self):
        self.eventlog = not self.eventlog
        self.view_flowlist()

    def _readflow(self, path):
        path = os.path.expanduser(path)
        try:
            f = file(path, "rb")
            flows = list(flow.FlowReader(f).stream())
        except (IOError, flow.FlowReadError), v:
            return True, v.strerror
        return False, flows

    def client_playback_path(self, path):
        err, ret = self._readflow(path)
        if err:
            self.statusbar.message(ret)
        else:
            self.start_client_playback(ret, False)

    def server_playback_path(self, path):
        err, ret = self._readflow(path)
        if err:
            self.statusbar.message(ret)
        else:
            self.start_server_playback(
                ret,
                self.killextra, self.rheaders,
                False, self.nopop
            )

    def spawn_editor(self, data):
        fd, name = tempfile.mkstemp('', "mproxy")
        os.write(fd, data)
        os.close(fd)
        c = os.environ.get("EDITOR")
        # if no EDITOR is set, assume 'vi'
        if not c:
            c = "vi"
        cmd = shlex.split(c)
        cmd.append(name)
        self.ui.stop()
        try:
            subprocess.call(cmd)
        except:
            self.statusbar.message("Can't start editor: %s" % " ".join(c))
        else:
            data = open(name,"rb").read()
        self.ui.start()
        os.unlink(name)
        return data

    def spawn_external_viewer(self, data, contenttype):
        if contenttype:
            contenttype = contenttype.split(";")[0]
            ext = mimetypes.guess_extension(contenttype) or ""
        else:
            ext = ""
        fd, name = tempfile.mkstemp(ext, "mproxy")
        os.write(fd, data)
        os.close(fd)

        # read-only to remind the user that this is a view function
        os.chmod(name, stat.S_IREAD)

        cmd = None
        shell = False

        if contenttype:
            c = mailcap.getcaps()
            cmd, _ = mailcap.findmatch(c, contenttype, filename=name)
            if cmd:
                shell = True
        if not cmd:
            # hm which one should get priority?
            c = os.environ.get("PAGER") or os.environ.get("EDITOR")
            if not c:
                c = "less"
            cmd = shlex.split(c)
            cmd.append(name)
        self.ui.stop()
        try:
            subprocess.call(cmd, shell=shell)
        except:
            self.statusbar.message("Can't start external viewer: %s" % " ".join(c))
        self.ui.start()
        os.unlink(name)

    def set_palette(self, name):
        self.palette = palettes.palettes[name]

    def run(self):
        self.ui = urwid.raw_display.Screen()
        self.ui.set_terminal_properties(256)
        self.ui.register_palette(self.palette)
        self.flow_list_walker = flowlist.FlowListWalker(self, self.state)
        self.view = None
        self.statusbar = None
        self.header = None
        self.body = None
        self.help_context = None
        self.prompting = False
        self.onekey = False

        self.view_flowlist()

        self.server.start_slave(controller.Slave, controller.Channel(self.masterq, self.should_exit))

        if self.options.rfile:
            ret = self.load_flows(self.options.rfile)
            if ret and self.state.flow_count():
                self.add_event("File truncated or corrupted. Loaded as many flows as possible.","error")
            elif not self.state.flow_count():
                self.shutdown()
                print >> sys.stderr, "Could not load file:", ret
                sys.exit(1)

        try:
            self.ui.run_wrapper(self.loop)
        except Exception:
            self.ui.stop()
            sys.stdout.flush()
            print >> sys.stderr, traceback.format_exc()
            print >> sys.stderr, "mitmproxy has crashed!"
            print >> sys.stderr, "Please lodge a bug report at: https://github.com/mitmproxy/mitmproxy"
        print >> sys.stderr, "Shutting down..."
        sys.stderr.flush()
        self.shutdown()

    def make_view(self):
        self.view = urwid.Frame(
                        self.body,
                        header = self.header,
                        footer = self.statusbar
                    )
        self.view.set_focus("body")

    def view_help(self):
        h = help.HelpView(self, self.help_context, (self.statusbar, self.body, self.header))
        self.statusbar = StatusBar(self, help.footer)
        self.body = h
        self.header = None
        self.make_view()

    def view_flowdetails(self, flow):
        h = flowdetailview.FlowDetailsView(self, flow, (self.statusbar, self.body, self.header))
        self.statusbar = StatusBar(self, flowdetailview.footer)
        self.body = h
        self.header = None
        self.make_view()

    def view_grideditor(self, ge):
        self.body = ge
        self.header = None
        self.help_context = ge.make_help()
        self.statusbar = StatusBar(self, grideditor.footer)
        self.make_view()

    def view_flowlist(self):
        if self.ui.started:
            self.ui.clear()
        if self.state.follow_focus:
            self.state.set_focus(self.state.flow_count())

        if self.eventlog:
            self.body = flowlist.BodyPile(self)
        else:
            self.body = flowlist.FlowListBox(self)
        self.statusbar = StatusBar(self, flowlist.footer)
        self.header = None
        self.state.view_mode = common.VIEW_LIST

        self.make_view()
        self.help_context = flowlist.help_context

    def view_flow(self, flow):
        self.body = flowview.FlowView(self, self.state, flow)
        self.header = flowview.FlowViewHeader(self, flow)
        self.statusbar = StatusBar(self, flowview.footer)
        self.state.set_focus_flow(flow)
        self.state.view_mode = common.VIEW_FLOW
        self.make_view()
        self.help_context = flowview.help_context

    def _write_flows(self, path, flows):
        self.state.last_saveload = path
        if not path:
            return
        path = os.path.expanduser(path)
        try:
            f = file(path, "wb")
            fw = flow.FlowWriter(f)
            for i in flows:
                fw.add(i)
            f.close()
        except IOError, v:
            self.statusbar.message(v.strerror)

    def save_one_flow(self, path, flow):
        return self._write_flows(path, [flow])

    def save_flows(self, path):
        return self._write_flows(path, self.state.view)

    def load_flows_callback(self, path):
        if not path:
            return
        ret = self.load_flows(path)
        return ret or "Flows loaded from %s"%path

    def load_flows(self, path):
        self.state.last_saveload = path
        path = os.path.expanduser(path)
        try:
            f = file(path, "rb")
            fr = flow.FlowReader(f)
        except IOError, v:
            return v.strerror
        reterr = None
        try:
            flow.FlowMaster.load_flows(self, fr)
        except flow.FlowReadError, v:
            reterr = v.strerror
        f.close()
        if self.flow_list_walker:
            self.sync_list_view()
        return reterr

    def path_prompt(self, prompt, text, callback, *args):
        self.statusbar.path_prompt(prompt, text)
        self.view.set_focus("footer")
        self.prompting = (callback, args)

    def prompt(self, prompt, text, callback, *args):
        self.statusbar.prompt(prompt, text)
        self.view.set_focus("footer")
        self.prompting = (callback, args)

    def prompt_edit(self, prompt, text, callback):
        self.statusbar.prompt(prompt + ": ", text)
        self.view.set_focus("footer")
        self.prompting = (callback, [])

    def prompt_onekey(self, prompt, keys, callback, *args):
        """
            Keys are a set of (word, key) tuples. The appropriate key in the
            word is highlighted.
        """
        prompt = [prompt, " ("]
        mkup = []
        for i, e in enumerate(keys):
            mkup.extend(common.highlight_key(e[0], e[1]))
            if i < len(keys)-1:
                mkup.append(",")
        prompt.extend(mkup)
        prompt.append(")? ")
        self.onekey = "".join(i[1] for i in keys)
        self.prompt(prompt, "", callback, *args)

    def prompt_done(self):
        self.prompting = False
        self.onekey = False
        self.view.set_focus("body")
        self.statusbar.message("")

    def prompt_execute(self, txt=None):
        if not txt:
            txt = self.statusbar.get_edit_text()
        p, args = self.prompting
        self.prompt_done()
        msg = p(txt, *args)
        if msg:
            self.statusbar.message(msg, 1000)

    def prompt_cancel(self):
        self.prompt_done()

    def accept_all(self):
        self.state.accept_all()

    def set_limit(self, txt):
        v = self.state.set_limit(txt)
        self.sync_list_view()
        return v

    def set_intercept(self, txt):
        return self.state.set_intercept(txt)

    def change_default_display_mode(self, t):
        v = contentview.get_by_shortcut(t)
        self.state.default_body_view = v
        self.refresh_focus()

    def drawscreen(self):
        size = self.ui.get_cols_rows()
        canvas = self.view.render(size, focus=1)
        self.ui.draw_screen(size, canvas)
        return size

    def pop_view(self):
        if self.state.view_mode == common.VIEW_FLOW:
            self.view_flow(self.state.view[self.state.focus])
        else:
            self.view_flowlist()

    def edit_scripts(self, scripts):
        commands = [x[0] for x in scripts]  # remove outer array
        if commands == [s.command for s in self.scripts]:
            return

        self.unload_scripts()
        for command in commands:
            self.load_script(command)

    def edit_ignore(self, ignore):
        patterns = (x[0] for x in ignore)
        self.set_ignore(patterns)

    def loop(self):
        changed = True
        try:
            while not self.should_exit.is_set():
                startloop = time.time()
                if changed:
                    self.statusbar.redraw()
                    size = self.drawscreen()
                changed = self.tick(self.masterq, 0.01)
                self.ui.set_input_timeouts(max_wait=0.1)
                keys = self.ui.get_input()
                if keys:
                    changed = True
                for k in keys:
                    if self.prompting:
                        if k == "esc":
                            self.prompt_cancel()
                        elif self.onekey:
                            if k == "enter":
                                self.prompt_cancel()
                            elif k in self.onekey:
                                self.prompt_execute(k)
                        elif k == "enter":
                            self.prompt_execute()
                        else:
                            self.view.keypress(size, k)
                    else:
                        k = self.view.keypress(size, k)
                        if k:
                            self.statusbar.message("")
                            if k == "?":
                                self.view_help()
                            elif k == "c":
                                if not self.client_playback:
                                    self.path_prompt(
                                        "Client replay: ",
                                        self.state.last_saveload,
                                        self.client_playback_path
                                    )
                                else:
                                    self.prompt_onekey(
                                        "Stop current client replay?",
                                        (
                                            ("yes", "y"),
                                            ("no", "n"),
                                        ),
                                        self.stop_client_playback_prompt,
                                    )
                            elif k == "H":
                                self.view_grideditor(
                                    grideditor.SetHeadersEditor(
                                        self,
                                        self.setheaders.get_specs(),
                                        self.setheaders.set
                                    )
                                )
                            elif k == "I":
                                self.view_grideditor(
                                    grideditor.IgnoreEditor(
                                        self,
                                        [[x] for x in self.get_ignore()],
                                        self.edit_ignore
                                    )
                                )
                            elif k == "i":
                                self.prompt(
                                    "Intercept filter: ",
                                    self.state.intercept_txt,
                                    self.set_intercept
                                )
                            elif k == "Q":
                                raise Stop
                            elif k == "q":
                                self.prompt_onekey(
                                    "Quit",
                                    (
                                        ("yes", "y"),
                                        ("no", "n"),
                                    ),
                                    self.quit,
                                )
                            elif k == "M":
                                self.prompt_onekey(
                                    "Global default display mode",
                                    contentview.view_prompts,
                                    self.change_default_display_mode
                                )
                            elif k == "R":
                                self.view_grideditor(
                                    grideditor.ReplaceEditor(
                                        self,
                                        self.replacehooks.get_specs(),
                                        self.replacehooks.set
                                    )
                                )
                            elif k == "s":
                                self.view_grideditor(
                                    grideditor.ScriptEditor(
                                        self,
                                        [[i.command] for i in self.scripts],
                                        self.edit_scripts
                                    )
                                )
                                #if self.scripts:
                                #    self.load_script(None)
                                #else:
                                #    self.path_prompt(
                                #        "Set script: ",
                                #        self.state.last_script,
                                #        self.set_script
                                #    )
                            elif k == "S":
                                if not self.server_playback:
                                    self.path_prompt(
                                        "Server replay path: ",
                                        self.state.last_saveload,
                                        self.server_playback_path
                                    )
                                else:
                                    self.prompt_onekey(
                                        "Stop current server replay?",
                                        (
                                            ("yes", "y"),
                                            ("no", "n"),
                                        ),
                                        self.stop_server_playback_prompt,
                                    )
                            elif k == "o":
                                self.prompt_onekey(
                                        "Options",
                                        (
                                            ("anticache", "a"),
                                            ("anticomp", "c"),
                                            ("showhost", "h"),
                                            ("killextra", "k"),
                                            ("norefresh", "n"),
                                            ("no-upstream-certs", "u"),
                                        ),
                                        self._change_options
                                )
                            elif k == "t":
                                self.prompt(
                                    "Sticky cookie filter: ",
                                    self.stickycookie_txt,
                                    self.set_stickycookie
                                )
                            elif k == "u":
                                self.prompt(
                                    "Sticky auth filter: ",
                                    self.stickyauth_txt,
                                    self.set_stickyauth
                                )
                self.looptime = time.time() - startloop
        except (Stop, KeyboardInterrupt):
            pass

    def stop_client_playback_prompt(self, a):
        if a != "n":
            self.stop_client_playback()

    def stop_server_playback_prompt(self, a):
        if a != "n":
            self.stop_server_playback()

    def quit(self, a):
        if a != "n":
            raise Stop

    def _change_options(self, a):
        if a == "a":
            self.anticache = not self.anticache
        if a == "c":
            self.anticomp = not self.anticomp
        if a == "h":
            self.showhost = not self.showhost
            self.sync_list_view()
            self.refresh_focus()
        elif a == "k":
            self.killextra = not self.killextra
        elif a == "n":
            self.refresh_server_playback = not self.refresh_server_playback
        elif a == "u":
            self.server.config.no_upstream_cert = not self.server.config.no_upstream_cert

    def shutdown(self):
        self.state.killall(self)
        flow.FlowMaster.shutdown(self)

    def sync_list_view(self):
        self.flow_list_walker._modified()

    def clear_flows(self):
        self.state.clear()
        self.sync_list_view()

    def toggle_follow_flows(self):
        # toggle flow follow
        self.state.follow_focus = not self.state.follow_focus
        # jump to most recent flow if follow is now on
        if self.state.follow_focus:
            self.state.set_focus(self.state.flow_count())
            self.sync_list_view()

    def delete_flow(self, f):
        self.state.delete_flow(f)
        self.sync_list_view()

    def refresh_focus(self):
        if self.state.view:
            self.refresh_flow(self.state.view[self.state.focus])

    def refresh_flow(self, c):
        if hasattr(self.header, "refresh_flow"):
            self.header.refresh_flow(c)
        if hasattr(self.body, "refresh_flow"):
            self.body.refresh_flow(c)
        if hasattr(self.statusbar, "refresh_flow"):
            self.statusbar.refresh_flow(c)

    def process_flow(self, f):
        if self.state.intercept and f.match(self.state.intercept) and not f.request.is_replay:
            f.intercept()
        else:
            f.reply()
        self.sync_list_view()
        self.refresh_flow(f)

    def clear_events(self):
        self.eventlist[:] = []

    def add_event(self, e, level="info"):
        needed = dict(error=1, info=1, debug=2).get(level, 1)
        if self.options.verbosity < needed:
            return

        if level == "error":
            e = urwid.Text(("error", str(e)))
        else:
            e = urwid.Text(str(e))
        self.eventlist.append(e)
        if len(self.eventlist) > EVENTLOG_SIZE:
            self.eventlist.pop(0)
        self.eventlist.set_focus(len(self.eventlist)-1)

    # Handlers
    def handle_error(self, f):
        f = flow.FlowMaster.handle_error(self, f)
        if f:
            self.process_flow(f)
        return f

    def handle_request(self, f):
        f = flow.FlowMaster.handle_request(self, f)
        if f:
            self.process_flow(f)
        return f

    def handle_response(self, f):
        f = flow.FlowMaster.handle_response(self, f)
        if f:
            self.process_flow(f)
        return f