""" This module provides more sophisticated flow tracking. These match requests with their responses, and provide filtering and interception facilities. """ import hashlib, Cookie, cookielib, copy, re, urlparse, threading import time, urllib import tnetstring, filt, script, utils, encoding, proxy from email.utils import parsedate_tz, formatdate, mktime_tz from netlib import odict, http, certutils, wsgi import controller, version import app HDR_FORM_URLENCODED = "application/x-www-form-urlencoded" CONTENT_MISSING = 0 ODict = odict.ODict ODictCaseless = odict.ODictCaseless class AppRegistry: def __init__(self): self.apps = {} def add(self, app, domain, port): """ Add a WSGI app to the registry, to be served for requests to the specified domain, on the specified port. """ self.apps[(domain, port)] = wsgi.WSGIAdaptor(app, domain, port, version.NAMEVERSION) def get(self, request): """ Returns an WSGIAdaptor instance if request matches an app, or None. """ if (request.host, request.port) in self.apps: return self.apps[(request.host, request.port)] if "host" in request.headers: host = request.headers["host"][0] return self.apps.get((host, request.port), None) class ReplaceHooks: def __init__(self): self.lst = [] def set(self, r): self.clear() for i in r: self.add(*i) def add(self, fpatt, rex, s): """ add a replacement hook. fpatt: a string specifying a filter pattern. rex: a regular expression. s: the replacement string returns true if hook was added, false if the pattern could not be parsed. """ cpatt = filt.parse(fpatt) if not cpatt: return False try: re.compile(rex) except re.error: return False self.lst.append((fpatt, rex, s, cpatt)) return True def get_specs(self): """ Retrieve the hook specifcations. Returns a list of (fpatt, rex, s) tuples. """ return [i[:3] for i in self.lst] def count(self): return len(self.lst) def run(self, f): for _, rex, s, cpatt in self.lst: if cpatt(f): if f.response: f.response.replace(rex, s) else: f.request.replace(rex, s) def clear(self): self.lst = [] class SetHeaders: def __init__(self): self.lst = [] def set(self, r): self.clear() for i in r: self.add(*i) def add(self, fpatt, header, value): """ Add a set header hook. fpatt: String specifying a filter pattern. header: Header name. value: Header value string Returns True if hook was added, False if the pattern could not be parsed. """ cpatt = filt.parse(fpatt) if not cpatt: return False self.lst.append((fpatt, header, value, cpatt)) return True def get_specs(self): """ Retrieve the hook specifcations. Returns a list of (fpatt, rex, s) tuples. """ return [i[:3] for i in self.lst] def count(self): return len(self.lst) def clear(self): self.lst = [] def run(self, f): for _, header, value, cpatt in self.lst: if cpatt(f): if f.response: del f.response.headers[header] else: del f.request.headers[header] for _, header, value, cpatt in self.lst: if cpatt(f): if f.response: f.response.headers.add(header, value) else: f.request.headers.add(header, value) class StateObject: def _get_state(self): raise NotImplementedError def _load_state(self, state): raise NotImplementedError @classmethod def _from_state(cls, state): raise NotImplementedError def __eq__(self, other): try: return self._get_state() == other._get_state() except AttributeError: # we may compare with something that's not a StateObject return False class SimpleStateObject(StateObject): """ A StateObject with opionated conventions that tries to keep everything DRY.y """ _stateobject_attributes = None """ A dict where the keys represent the attributes to be serialized. The values represent the attribute class or type. If the attribute is a class, this class must be a subclass of StateObject. """ def _get_state(self): return {attr: (getattr(self, attr)._get_state() if (type(cls) == 'classobj') else getattr(self, attr)) for attr, cls in self._stateobject_attributes.iteritems()} def _load_state(self, state): for attr, cls in self._stateobject_attributes.iteritems(): self._load_state_attr(attr, cls, state) def _load_state_attr(self, attribute, cls, state): if state[attribute] is not None: if type(cls) == 'classobj': assert issubclass(cls, StateObject) curr = getattr(self, attribute) if curr: curr._load_state(state[attribute]) else: setattr(self, attribute, cls._from_state(state[attribute])) else: setattr(self, attribute, cls(state[attribute])) else: setattr(self, attribute, None) @classmethod def _from_state(cls, state): f = cls() f._load_state(state) return f class Response(object): """ An HTTP response. Exposes the following attributes: request: Request object. code: HTTP response code msg: HTTP response message headers: ODict object content: Content of the request, None, or CONTENT_MISSING if there is content associated, but not present. CONTENT_MISSING evaluates to False to make checking for the presence of content natural. timestamp_start: Seconds since the epoch signifying response transmission started timestamp_end: Seconds since the epoch signifying response transmission ended """ def __init__(self, request, httpversion, code, msg, headers, content, cert, timestamp_start=None, timestamp_end=None): assert isinstance(headers, ODictCaseless) self.request = request self.httpversion, self.code, self.msg = httpversion, code, msg self.headers, self.content = headers, content self.cert = cert self.timestamp_start = timestamp_start or utils.timestamp() self.timestamp_end = timestamp_end or utils.timestamp() self.replay = False def _refresh_cookie(self, c, delta): """ Takes a cookie string c and a time delta in seconds, and returns a refreshed cookie string. """ c = Cookie.SimpleCookie(str(c)) for i in c.values(): if "expires" in i: d = parsedate_tz(i["expires"]) if d: d = mktime_tz(d) + delta i["expires"] = formatdate(d) else: # This can happen when the expires tag is invalid. # reddit.com sends a an expires tag like this: "Thu, 31 Dec # 2037 23:59:59 GMT", which is valid RFC 1123, but not # strictly correct according tot he cookie spec. Browsers # appear to parse this tolerantly - maybe we should too. # For now, we just ignore this. del i["expires"] return c.output(header="").strip() def refresh(self, now=None): """ This fairly complex and heuristic function refreshes a server response for replay. - It adjusts date, expires and last-modified headers. - It adjusts cookie expiration. """ if not now: now = time.time() delta = now - self.timestamp_start refresh_headers = [ "date", "expires", "last-modified", ] for i in refresh_headers: if i in self.headers: d = parsedate_tz(self.headers[i][0]) if d: new = mktime_tz(d) + delta self.headers[i] = [formatdate(new)] c = [] for i in self.headers["set-cookie"]: c.append(self._refresh_cookie(i, delta)) if c: self.headers["set-cookie"] = c def _set_replay(self): self.replay = True def is_replay(self): """ Is this response a replay? """ return self.replay def _load_state(self, state): self.code = state["code"] self.msg = state["msg"] self.headers = ODictCaseless._from_state(state["headers"]) self.content = state["content"] self.timestamp_start = state["timestamp_start"] self.timestamp_end = state["timestamp_end"] self.cert = certutils.SSLCert.from_pem(state["cert"]) if state["cert"] else None def _get_state(self): return dict( httpversion = self.httpversion, code = self.code, msg = self.msg, headers = self.headers._get_state(), timestamp_start = self.timestamp_start, timestamp_end = self.timestamp_end, cert = self.cert.to_pem() if self.cert else None, content = self.content, ) @classmethod def _from_state(klass, request, state): return klass( request, state["httpversion"], state["code"], str(state["msg"]), ODictCaseless._from_state(state["headers"]), state["content"], certutils.SSLCert.from_pem(state["cert"]) if state["cert"] else None, state["timestamp_start"], state["timestamp_end"], ) def copy(self): c = copy.copy(self) c.headers = self.headers.copy() return c def _assemble_head(self): FMT = '%s\r\n%s\r\n' headers = self.headers.copy() utils.del_all( headers, ['proxy-connection', 'transfer-encoding'] ) if self.content: headers["Content-Length"] = [str(len(self.content))] elif 'Transfer-Encoding' in self.headers: headers["Content-Length"] = ["0"] proto = "HTTP/%s.%s %s %s"%(self.httpversion[0], self.httpversion[1], self.code, str(self.msg)) data = (proto, str(headers)) return FMT%data def _assemble(self): """ Assembles the response for transmission to the client. We make some modifications to make sure interception works properly. Returns None if the request cannot be assembled. """ if self.content == CONTENT_MISSING: return None head = self._assemble_head() if self.content: return head + self.content else: return head def replace(self, pattern, repl, *args, **kwargs): """ Replaces a regular expression pattern with repl in both the headers and the body of the response. Encoded content will be decoded before replacement, and re-encoded afterwards. Returns the number of replacements made. """ with decoded(self): self.content, c = utils.safe_subn(pattern, repl, self.content, *args, **kwargs) c += self.headers.replace(pattern, repl, *args, **kwargs) return c def get_header_size(self): FMT = '%s\r\n%s\r\n' proto = "HTTP/%s.%s %s %s"%(self.httpversion[0], self.httpversion[1], self.code, str(self.msg)) assembled_header = FMT % (proto, str(self.headers)) return len(assembled_header) def get_cookies(self): cookie_headers = self.headers.get("set-cookie") if not cookie_headers: return None cookies = [] for header in cookie_headers: pairs = [pair.partition("=") for pair in header.split(';')] cookie_name = pairs[0][0] # the key of the first key/value pairs cookie_value = pairs[0][2] # the value of the first key/value pairs cookie_parameters = {key.strip().lower():value.strip() for key,sep,value in pairs[1:]} cookies.append((cookie_name, (cookie_value, cookie_parameters))) return dict(cookies) class ClientDisconnect: """ A client disconnection event. Exposes the following attributes: client_conn: ClientConnect object. """ def __init__(self, client_conn): self.client_conn = client_conn class ClientConnect(StateObject): """ A single client connection. Each connection can result in multiple HTTP Requests. Exposes the following attributes: address: (address, port) tuple, or None if the connection is replayed. requestcount: Number of requests created by this client connection. close: Is the client connection closed? error: Error string or None. """ def __init__(self, address): """ address is an (address, port) tuple, or None if this connection has been replayed from within mitmproxy. """ self.address = address self.close = False self.error = None def __str__(self): if self.address: return "%s:%d"%(self.address[0],self.address[1]) def _load_state(self, state): self.close = True self.error = state["error"] self.requestcount = state["requestcount"] def _get_state(self): return dict( address = list(self.address), requestcount = -1, # FIXME self.requestcount, error = self.error, ) @classmethod def _from_state(klass, state): if state: k = klass(state["address"]) k._load_state(state) return k else: return None def copy(self): return copy.copy(self) class Error(StateObject): """ An Error. This is distinct from an HTTP error response (say, a code 500), which is represented by a normal Response object. This class is responsible for indicating errors that fall outside of normal HTTP communications, like interrupted connections, timeouts, protocol errors. Exposes the following attributes: request: Request object msg: Message describing the error timestamp: Seconds since the epoch """ def __init__(self, request, msg, timestamp=None): self.request, self.msg = request, msg self.timestamp = timestamp or utils.timestamp() def _load_state(self, state): self.msg = state["msg"] self.timestamp = state["timestamp"] def copy(self): c = copy.copy(self) return c def _get_state(self): return dict( msg = self.msg, timestamp = self.timestamp, ) @classmethod def _from_state(klass, request, state): return klass( request, state["msg"], state["timestamp"], ) def replace(self, pattern, repl, *args, **kwargs): """ Replaces a regular expression pattern with repl in both the headers and the body of the request. Returns the number of replacements made. FIXME: Is replace useful on an Error object?? """ self.msg, c = utils.safe_subn(pattern, repl, self.msg, *args, **kwargs) return c class ClientPlaybackState: def __init__(self, flows, exit): self.flows, self.exit = flows, exit self.current = None def count(self): return len(self.flows) def done(self): if len(self.flows) == 0 and not self.current: return True return False def clear(self, flow): """ A request has returned in some way - if this is the one we're servicing, go to the next flow. """ if flow is self.current: self.current = None def tick(self, master, testing=False): """ testing: Disables actual replay for testing. """ if self.flows and not self.current: n = self.flows.pop(0) n.request.reply = controller.DummyReply() n.request.client_conn = None self.current = master.handle_request(n.request) if not testing and not self.current.response: master.replay_request(self.current) # pragma: no cover elif self.current.response: master.handle_response(self.current.response) class ServerPlaybackState: def __init__(self, headers, flows, exit, nopop): """ headers: Case-insensitive list of request headers that should be included in request-response matching. """ self.headers, self.exit, self.nopop = headers, exit, nopop self.fmap = {} for i in flows: if i.response: l = self.fmap.setdefault(self._hash(i), []) l.append(i) def count(self): return sum(len(i) for i in self.fmap.values()) def _hash(self, flow): """ Calculates a loose hash of the flow request. """ r = flow.request key = [ str(r.host), str(r.port), str(r.scheme), str(r.method), str(r.path), str(r.content), ] if self.headers: hdrs = [] for i in self.headers: v = r.headers[i] # Slightly subtle: we need to convert everything to strings # to prevent a mismatch between unicode/non-unicode. v = [str(x) for x in v] hdrs.append((i, v)) key.append(repr(hdrs)) return hashlib.sha256(repr(key)).digest() def next_flow(self, request): """ Returns the next flow object, or None if no matching flow was found. """ l = self.fmap.get(self._hash(request)) if not l: return None if self.nopop: return l[0] else: return l.pop(0) class StickyCookieState: def __init__(self, flt): """ flt: Compiled filter. """ self.jar = {} self.flt = flt def ckey(self, m, f): """ Returns a (domain, port, path) tuple. """ return ( m["domain"] or f.request.host, f.request.port, m["path"] or "/" ) def domain_match(self, a, b): if cookielib.domain_match(a, b): return True elif cookielib.domain_match(a, b.strip(".")): return True return False def handle_response(self, f): for i in f.response.headers["set-cookie"]: # FIXME: We now know that Cookie.py screws up some cookies with # valid RFC 822/1123 datetime specifications for expiry. Sigh. c = Cookie.SimpleCookie(str(i)) m = c.values()[0] k = self.ckey(m, f) if self.domain_match(f.request.host, k[0]): self.jar[self.ckey(m, f)] = m def handle_request(self, f): l = [] if f.match(self.flt): for i in self.jar.keys(): match = [ self.domain_match(f.request.host, i[0]), f.request.port == i[1], f.request.path.startswith(i[2]) ] if all(match): l.append(self.jar[i].output(header="").strip()) if l: f.request.stickycookie = True f.request.headers["cookie"] = l class StickyAuthState: def __init__(self, flt): """ flt: Compiled filter. """ self.flt = flt self.hosts = {} def handle_request(self, f): if "authorization" in f.request.headers: self.hosts[f.request.host] = f.request.headers["authorization"] elif f.match(self.flt): if f.request.host in self.hosts: f.request.headers["authorization"] = self.hosts[f.request.host] class Flow: """ A Flow is a collection of objects representing a single HTTP transaction. The main attributes are: request: Request object response: Response object error: Error object Note that it's possible for a Flow to have both a response and an error object. This might happen, for instance, when a response was received from the server, but there was an error sending it back to the client. The following additional attributes are exposed: intercepting: Is this flow currently being intercepted? """ def __init__(self, request): self.request = request self.response, self.error = None, None self.intercepting = False self._backup = None def copy(self): rc = self.request.copy() f = Flow(rc) if self.response: f.response = self.response.copy() f.response.request = rc if self.error: f.error = self.error.copy() f.error.request = rc return f @classmethod def _from_state(klass, state): f = klass(None) f._load_state(state) return f def _get_state(self): d = dict( request = self.request._get_state() if self.request else None, response = self.response._get_state() if self.response else None, error = self.error._get_state() if self.error else None, version = version.IVERSION ) return d def _load_state(self, state): if self.request: self.request._load_state(state["request"]) else: self.request = Request._from_state(state["request"]) if state["response"]: if self.response: self.response._load_state(state["response"]) else: self.response = Response._from_state(self.request, state["response"]) else: self.response = None if state["error"]: if self.error: self.error._load_state(state["error"]) else: self.error = Error._from_state(self.request, state["error"]) else: self.error = None def modified(self): """ Has this Flow been modified? """ # FIXME: Save a serialization in backup, compare current with # backup to detect if flow has _really_ been modified. if self._backup: return True else: return False def backup(self, force=False): """ Save a backup of this Flow, which can be reverted to using a call to .revert(). """ if not self._backup: self._backup = self._get_state() def revert(self): """ Revert to the last backed up state. """ if self._backup: self._load_state(self._backup) self._backup = None def match(self, f): """ Match this flow against a compiled filter expression. Returns True if matched, False if not. If f is a string, it will be compiled as a filter expression. If the expression is invalid, ValueError is raised. """ if isinstance(f, basestring): f = filt.parse(f) if not f: raise ValueError("Invalid filter expression.") if f: return f(self) return True def kill(self, master): """ Kill this request. """ self.error = Error(self.request, "Connection killed") self.error.reply = controller.DummyReply() if self.request and not self.request.reply.acked: self.request.reply(proxy.KILL) elif self.response and not self.response.reply.acked: self.response.reply(proxy.KILL) master.handle_error(self.error) self.intercepting = False def intercept(self): """ Intercept this Flow. Processing will stop until accept_intercept is called. """ self.intercepting = True def accept_intercept(self): """ Continue with the flow - called after an intercept(). """ if self.request: if not self.request.reply.acked: self.request.reply() elif self.response and not self.response.reply.acked: self.response.reply() self.intercepting = False def replace(self, pattern, repl, *args, **kwargs): """ Replaces a regular expression pattern with repl in all parts of the flow. Encoded content will be decoded before replacement, and re-encoded afterwards. Returns the number of replacements made. """ c = self.request.replace(pattern, repl, *args, **kwargs) if self.response: c += self.response.replace(pattern, repl, *args, **kwargs) if self.error: c += self.error.replace(pattern, repl, *args, **kwargs) return c class State(object): def __init__(self): self._flow_map = {} self._flow_list = [] self.view = [] # These are compiled filt expressions: self._limit = None self.intercept = None self._limit_txt = None @property def limit_txt(self): return self._limit_txt def flow_count(self): return len(self._flow_map) def index(self, f): return self._flow_list.index(f) def active_flow_count(self): c = 0 for i in self._flow_list: if not i.response and not i.error: c += 1 return c def add_request(self, req): """ Add a request to the state. Returns the matching flow. """ f = Flow(req) self._flow_list.append(f) self._flow_map[req] = f assert len(self._flow_list) == len(self._flow_map) if f.match(self._limit): self.view.append(f) return f def add_response(self, resp): """ Add a response to the state. Returns the matching flow. """ f = self._flow_map.get(resp.flow) if not f: return False f.response = resp if f.match(self._limit) and not f in self.view: self.view.append(f) return f def add_error(self, err): """ Add an error response to the state. Returns the matching flow, or None if there isn't one. """ f = self._flow_map.get(err.request) if not f: return None f.error = err if f.match(self._limit) and not f in self.view: self.view.append(f) return f def load_flows(self, flows): self._flow_list.extend(flows) for i in flows: self._flow_map[i.request] = i self.recalculate_view() def set_limit(self, txt): if txt: f = filt.parse(txt) if not f: return "Invalid filter expression." self._limit = f self._limit_txt = txt else: self._limit = None self._limit_txt = None self.recalculate_view() def set_intercept(self, txt): if txt: f = filt.parse(txt) if not f: return "Invalid filter expression." self.intercept = f self.intercept_txt = txt else: self.intercept = None self.intercept_txt = None def recalculate_view(self): if self._limit: self.view = [i for i in self._flow_list if i.match(self._limit)] else: self.view = self._flow_list[:] def delete_flow(self, f): if f.request in self._flow_map: del self._flow_map[f.request] self._flow_list.remove(f) if f in self.view: self.view.remove(f) return True def clear(self): for i in self._flow_list[:]: self.delete_flow(i) def accept_all(self): for i in self._flow_list[:]: i.accept_intercept() def revert(self, f): f.revert() def killall(self, master): for i in self._flow_list: i.kill(master) class FlowMaster(controller.Master): def __init__(self, server, state): controller.Master.__init__(self, server) self.state = state self.server_playback = None self.client_playback = None self.kill_nonreplay = False self.scripts = [] self.pause_scripts = False self.stickycookie_state = False self.stickycookie_txt = None self.stickyauth_state = False self.stickyauth_txt = None self.anticache = False self.anticomp = False self.refresh_server_playback = False self.replacehooks = ReplaceHooks() self.setheaders = SetHeaders() self.stream = None self.apps = AppRegistry() def start_app(self, host, port, external): if not external: self.apps.add( app.mapp, host, port ) else: threading.Thread(target=app.mapp.run,kwargs={ "use_reloader": False, "host": host, "port": port}).start() def add_event(self, e, level="info"): """ level: info, error """ pass def unload_scripts(self): for s in self.scripts[:]: s.unload() self.scripts.remove(s) def load_script(self, command): """ Loads a script. Returns an error description if something went wrong. """ try: s = script.Script(command, self) except script.ScriptError, v: return v.args[0] self.scripts.append(s) 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) if not flt: return "Invalid filter expression." self.stickycookie_state = StickyCookieState(flt) self.stickycookie_txt = txt else: self.stickycookie_state = None self.stickycookie_txt = None def set_stickyauth(self, txt): if txt: flt = filt.parse(txt) if not flt: return "Invalid filter expression." self.stickyauth_state = StickyAuthState(flt) self.stickyauth_txt = txt else: self.stickyauth_state = None self.stickyauth_txt = None def start_client_playback(self, flows, exit): """ flows: List of flows. """ self.client_playback = ClientPlaybackState(flows, exit) def stop_client_playback(self): self.client_playback = None def start_server_playback(self, flows, kill, headers, exit, nopop): """ flows: List of flows. kill: Boolean, should we kill requests not part of the replay? """ self.server_playback = ServerPlaybackState(headers, flows, exit, nopop) self.kill_nonreplay = kill def stop_server_playback(self): if self.server_playback.exit: self.shutdown() self.server_playback = None def do_server_playback(self, flow): """ This method should be called by child classes in the handle_request handler. Returns True if playback has taken place, None if not. """ if self.server_playback: rflow = self.server_playback.next_flow(flow) if not rflow: return None response = Response._from_state(flow.request, rflow.response._get_state()) response._set_replay() flow.response = response if self.refresh_server_playback: response.refresh() flow.request.reply(response) if self.server_playback.count() == 0: self.stop_server_playback() return True return None def tick(self, q): if self.client_playback: e = [ self.client_playback.done(), self.client_playback.exit, self.state.active_flow_count() == 0 ] if all(e): self.shutdown() self.client_playback.tick(self) return controller.Master.tick(self, q) def duplicate_flow(self, f): return self.load_flow(f.copy()) def load_flow(self, f): """ Loads a flow, and returns a new flow object. """ if f.request: f.request.reply = controller.DummyReply() fr = self.handle_request(f.request) if f.response: f.response.reply = controller.DummyReply() self.handle_response(f.response) if f.error: f.error.reply = controller.DummyReply() self.handle_error(f.error) return fr def load_flows(self, fr): """ Load flows from a FlowReader object. """ for i in fr.stream(): self.load_flow(i) def process_new_request(self, f): if self.stickycookie_state: self.stickycookie_state.handle_request(f) if self.stickyauth_state: self.stickyauth_state.handle_request(f) if self.anticache: f.request.anticache() if self.anticomp: f.request.anticomp() if self.server_playback: pb = self.do_server_playback(f) if not pb: if self.kill_nonreplay: f.kill(self) else: f.request.reply() def process_new_response(self, f): if self.stickycookie_state: self.stickycookie_state.handle_response(f) def replay_request(self, f, block=False): """ Returns None if successful, or error message if not. """ if f.intercepting: return "Can't replay while intercepting..." if f.request.content == CONTENT_MISSING: return "Can't replay request with missing content..." if f.request: f.request._set_replay() if f.request.content: f.request.headers["Content-Length"] = [str(len(f.request.content))] f.response = None f.error = None self.process_new_request(f) rt = proxy.RequestReplayThread( self.server.config, f, self.masterq, ) rt.start() # pragma: no cover if block: rt.join() def handle_clientconnect(self, cc): self.run_script_hook("clientconnect", cc) cc.reply() def handle_clientdisconnect(self, r): self.run_script_hook("clientdisconnect", r) r.reply() def handle_serverconnection(self, sc): # To unify the mitmproxy script API, we call the script hook # "serverconnect" rather than "serverconnection". As things are handled # differently in libmproxy (ClientConnect + ClientDisconnect vs # ServerConnection class), there is no "serverdisonnect" event at the # moment. self.run_script_hook("serverconnect", sc) sc.reply() def handle_error(self, r): f = self.state.add_error(r) if f: self.run_script_hook("error", f) if self.client_playback: self.client_playback.clear(f) r.reply() return f def handle_request(self, r): if False and r.is_live(): # FIXME app = self.apps.get(r) if app: # FIXME: for the tcp proxy, use flow.client_conn.wfile err = app.serve(r, r.wfile, **{"mitmproxy.master": self}) if err: self.add_event("Error in wsgi app. %s"%err, "error") r.reply(proxy.KILL) return f = self.state.add_request(r) self.replacehooks.run(f) self.setheaders.run(f) self.run_script_hook("request", f) self.process_new_request(f) return f def handle_response(self, r): f = self.state.add_response(r) if f: self.replacehooks.run(f) self.setheaders.run(f) self.run_script_hook("response", f) if self.client_playback: self.client_playback.clear(f) self.process_new_response(f) if self.stream: self.stream.add(f) else: r.reply() return f def shutdown(self): self.unload_scripts() controller.Master.shutdown(self) if self.stream: for i in self.state._flow_list: if not i.response: self.stream.add(i) self.stop_stream() def start_stream(self, fp, filt): self.stream = FilteredFlowWriter(fp, filt) def stop_stream(self): self.stream.fo.close() self.stream = None class FlowWriter: def __init__(self, fo): self.fo = fo def add(self, flow): d = flow._get_state() tnetstring.dump(d, self.fo) class FlowReadError(Exception): @property def strerror(self): return self.args[0] class FlowReader: def __init__(self, fo): self.fo = fo def stream(self): """ Yields Flow objects from the dump. """ off = 0 try: while 1: data = tnetstring.load(self.fo) if tuple(data["version"][:2]) != version.IVERSION[:2]: v = ".".join(str(i) for i in data["version"]) raise FlowReadError("Incompatible serialized data version: %s"%v) off = self.fo.tell() yield Flow._from_state(data) except ValueError, v: # Error is due to EOF if self.fo.tell() == off and self.fo.read() == '': return raise FlowReadError("Invalid data format.") class FilteredFlowWriter: def __init__(self, fo, filt): self.fo = fo self.filt = filt def add(self, f): if self.filt and not f.match(self.filt): return d = f._get_state() tnetstring.dump(d, self.fo)