mirror of
https://github.com/Grasscutters/mitmproxy.git
synced 2024-11-27 02:24:18 +00:00
299 lines
6.7 KiB
Python
299 lines
6.7 KiB
Python
import pyparsing as pp
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from netlib import http
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from netlib.http import user_agents, Headers
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from . import base, message
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"""
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Normal HTTP requests:
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<method>:<path>:<header>:<body>
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e.g.:
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GET:/
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GET:/:h"foo"="bar"
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POST:/:h"foo"="bar":b'content body payload'
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Normal HTTP responses:
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<code>:<header>:<body>
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e.g.:
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200
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302:h"foo"="bar"
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404:h"foo"="bar":b'content body payload'
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Individual HTTP/2 frames:
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h2f:<payload_length>:<type>:<flags>:<stream_id>:<payload>
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e.g.:
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h2f:0:PING
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h2f:42:HEADERS:END_HEADERS:0x1234567:foo=bar,host=example.com
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h2f:42:DATA:END_STREAM,PADDED:0x1234567:'content body payload'
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"""
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def get_header(val, headers):
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"""
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Header keys may be Values, so we have to "generate" them as we try the
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match.
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"""
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for h in headers:
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k = h.key.get_generator({})
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if len(k) == len(val) and k[:].lower() == val.lower():
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return h
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return None
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class _HeaderMixin(object):
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unique_name = None
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def values(self, settings):
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return (
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self.key.get_generator(settings),
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self.value.get_generator(settings),
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)
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class _HTTP2Message(message.Message):
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@property
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def actions(self):
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return [] # self.toks(actions._Action)
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@property
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def headers(self):
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headers = self.toks(_HeaderMixin)
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if not self.raw:
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if not get_header(b"content-length", headers):
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if not self.body:
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length = 0
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else:
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length = len(self.body.string())
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headers.append(
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Header(
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base.TokValueLiteral("content-length"),
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base.TokValueLiteral(str(length)),
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)
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)
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return headers
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@property
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def raw(self):
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return bool(self.tok(Raw))
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@property
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def body(self):
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return self.tok(Body)
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def resolve(self, settings):
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return self
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class StatusCode(base.Integer):
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pass
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class Method(base.OptionsOrValue):
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options = [
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"GET",
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"HEAD",
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"POST",
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"PUT",
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"DELETE",
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]
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class Path(base.Value):
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pass
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class Header(_HeaderMixin, base.KeyValue):
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preamble = "h"
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class ShortcutContentType(_HeaderMixin, base.Value):
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preamble = "c"
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key = base.TokValueLiteral("content-type")
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class ShortcutLocation(_HeaderMixin, base.Value):
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preamble = "l"
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key = base.TokValueLiteral("location")
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class ShortcutUserAgent(_HeaderMixin, base.OptionsOrValue):
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preamble = "u"
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options = [i[1] for i in user_agents.UASTRINGS]
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key = base.TokValueLiteral("user-agent")
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def values(self, settings):
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value = self.value.val
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if self.option_used:
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value = user_agents.get_by_shortcut(value.lower().decode())[2].encode()
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return (
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self.key.get_generator(settings),
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value
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)
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class Raw(base.CaselessLiteral):
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TOK = "r"
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class Body(base.Value):
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preamble = "b"
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class Times(base.Integer):
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preamble = "x"
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class Response(_HTTP2Message):
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unique_name = None
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comps = (
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Header,
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Body,
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ShortcutContentType,
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ShortcutLocation,
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Raw,
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)
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def __init__(self, tokens):
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super(Response, self).__init__(tokens)
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self.rendered_values = None
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self.stream_id = 2
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@property
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def status_code(self):
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return self.tok(StatusCode)
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@classmethod
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def expr(cls):
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parts = [i.expr() for i in cls.comps]
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atom = pp.MatchFirst(parts)
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resp = pp.And(
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[
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StatusCode.expr(),
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pp.ZeroOrMore(base.Sep + atom)
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]
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)
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resp = resp.setParseAction(cls)
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return resp
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def values(self, settings):
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if self.rendered_values:
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return self.rendered_values
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else:
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headers = Headers([header.values(settings) for header in self.headers])
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body = self.body
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if body:
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body = body.string()
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resp = http.Response(
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(2, 0),
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self.status_code.string(),
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b'',
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headers,
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body,
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)
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resp.stream_id = self.stream_id
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self.rendered_values = settings.protocol.assemble(resp)
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return self.rendered_values
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def spec(self):
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return ":".join([i.spec() for i in self.tokens])
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class NestedResponse(base.NestedMessage):
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preamble = "s"
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nest_type = Response
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class Request(_HTTP2Message):
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comps = (
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Header,
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ShortcutContentType,
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ShortcutUserAgent,
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Raw,
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NestedResponse,
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Body,
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Times,
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)
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logattrs = ["method", "path"]
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def __init__(self, tokens):
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super(Request, self).__init__(tokens)
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self.rendered_values = None
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self.stream_id = 1
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@property
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def method(self):
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return self.tok(Method)
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@property
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def path(self):
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return self.tok(Path)
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@property
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def nested_response(self):
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return self.tok(NestedResponse)
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@property
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def times(self):
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return self.tok(Times)
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@classmethod
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def expr(cls):
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parts = [i.expr() for i in cls.comps]
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atom = pp.MatchFirst(parts)
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resp = pp.And(
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[
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Method.expr(),
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base.Sep,
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Path.expr(),
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pp.ZeroOrMore(base.Sep + atom)
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]
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)
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resp = resp.setParseAction(cls)
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return resp
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def values(self, settings):
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if self.rendered_values:
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return self.rendered_values
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else:
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path = self.path.string()
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if self.nested_response:
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path += self.nested_response.parsed.spec().encode()
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headers = Headers([header.values(settings) for header in self.headers])
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body = self.body
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if body:
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body = body.string()
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req = http.Request(
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b'',
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self.method.string(),
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b'',
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b'',
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b'',
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path,
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(2, 0),
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headers,
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body,
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)
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req.stream_id = self.stream_id
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self.rendered_values = settings.protocol.assemble(req)
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return self.rendered_values
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def spec(self):
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return ":".join([i.spec() for i in self.tokens])
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def make_error_response(reason, body=None):
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tokens = [
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StatusCode("800"),
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Body(base.TokValueLiteral("pathod error: " + (body or reason))),
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]
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return Response(tokens)
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