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import hashlib
import urllib
import typing
from mitmproxy import ctx
from mitmproxy import flow
from mitmproxy import exceptions
from mitmproxy import io
from mitmproxy import command
import mitmproxy.types
class ServerPlayback:
def __init__(self):
self.flowmap = {}
self.stop = False
self.final_flow = None
self.configured = False
def load(self, loader):
loader.add_option(
"server_replay_kill_extra", bool, False,
"Kill extra requests during replay."
)
loader.add_option(
"server_replay_nopop", bool, False,
"""
Don't remove flows from server replay state after use. This makes it
possible to replay same response multiple times.
"""
)
loader.add_option(
"server_replay_refresh", bool, True,
"""
Refresh server replay responses by adjusting date, expires and
last-modified headers, as well as adjusting cookie expiration.
"""
)
loader.add_option(
"server_replay_use_headers", typing.Sequence[str], [],
"Request headers to be considered during replay."
)
loader.add_option(
"server_replay", typing.Sequence[str], [],
"Replay server responses from a saved file."
)
loader.add_option(
"server_replay_ignore_content", bool, False,
"Ignore request's content while searching for a saved flow to replay."
)
loader.add_option(
"server_replay_ignore_params", typing.Sequence[str], [],
"""
Request's parameters to be ignored while searching for a saved flow
to replay.
"""
)
loader.add_option(
"server_replay_ignore_payload_params", typing.Sequence[str], [],
"""
Request's payload parameters (application/x-www-form-urlencoded or
multipart/form-data) to be ignored while searching for a saved flow
to replay.
"""
)
loader.add_option(
"server_replay_ignore_host", bool, False,
"""
Ignore request's destination host while searching for a saved flow
to replay.
"""
)
@command.command("replay.server")
def load_flows(self, flows: typing.Sequence[flow.Flow]) -> None:
"""
Replay server responses from flows.
"""
self.flowmap = {}
for i in flows:
if i.response: # type: ignore
l = self.flowmap.setdefault(self._hash(i), [])
l.append(i)
ctx.master.addons.trigger("update", [])
@command.command("replay.server.file")
def load_file(self, path: mitmproxy.types.Path) -> None:
try:
flows = io.read_flows_from_paths([path])
except exceptions.FlowReadException as e:
raise exceptions.CommandError(str(e))
self.load_flows(flows)
@command.command("replay.server.stop")
def clear(self) -> None:
"""
Stop server replay.
"""
self.flowmap = {}
ctx.master.addons.trigger("update", [])
def count(self):
return sum([len(i) for i in self.flowmap.values()])
def _hash(self, flow):
"""
Calculates a loose hash of the flow request.
"""
r = flow.request
_, _, path, _, query, _ = urllib.parse.urlparse(r.url)
queriesArray = urllib.parse.parse_qsl(query, keep_blank_values=True)
key = [str(r.port), str(r.scheme), str(r.method), str(path)] # type: List[Any]
if not ctx.options.server_replay_ignore_content:
if ctx.options.server_replay_ignore_payload_params and r.multipart_form:
key.extend(
(k, v)
for k, v in r.multipart_form.items(multi=True)
if k.decode(errors="replace") not in ctx.options.server_replay_ignore_payload_params
)
elif ctx.options.server_replay_ignore_payload_params and r.urlencoded_form:
key.extend(
(k, v)
for k, v in r.urlencoded_form.items(multi=True)
if k not in ctx.options.server_replay_ignore_payload_params
)
else:
key.append(str(r.raw_content))
if not ctx.options.server_replay_ignore_host:
key.append(r.host)
filtered = []
ignore_params = ctx.options.server_replay_ignore_params or []
for p in queriesArray:
if p[0] not in ignore_params:
filtered.append(p)
for p in filtered:
key.append(p[0])
key.append(p[1])
if ctx.options.server_replay_use_headers:
headers = []
for i in ctx.options.server_replay_use_headers:
v = r.headers.get(i)
headers.append((i, v))
key.append(headers)
return hashlib.sha256(
repr(key).encode("utf8", "surrogateescape")
).digest()
def next_flow(self, request):
"""
Returns the next flow object, or None if no matching flow was
found.
"""
hsh = self._hash(request)
if hsh in self.flowmap:
if ctx.options.server_replay_nopop:
return self.flowmap[hsh][0]
else:
ret = self.flowmap[hsh].pop(0)
if not self.flowmap[hsh]:
del self.flowmap[hsh]
return ret
def configure(self, updated):
if not self.configured and ctx.options.server_replay:
self.configured = True
try:
flows = io.read_flows_from_paths(ctx.options.server_replay)
except exceptions.FlowReadException as e:
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)
if rflow:
response = rflow.response.copy()
response.is_replay = True
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(
f.request.url
)
)
f.reply.kill()
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