mirror of
https://github.com/Grasscutters/mitmproxy.git
synced 2024-11-23 00:01:36 +00:00
618 lines
19 KiB
Python
618 lines
19 KiB
Python
"""
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A simple proxy server implementation, which always reads all of a server
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response into memory, performs some transformation, and then writes it back
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to the client.
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Development started from Neil Schemenauer's munchy.py
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"""
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import sys, os, time, string, socket, urlparse, re, select, copy
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import SocketServer, ssl
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import utils, controller
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NAME = "mitmproxy"
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config = None
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class ProxyError(Exception):
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def __init__(self, code, msg):
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self.code, self.msg = code, msg
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def __str__(self):
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return "ProxyError(%s, %s)"%(self.code, self.msg)
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class Config:
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def __init__(self, pemfile):
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self.pemfile = pemfile
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def read_chunked(fp):
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content = ""
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while 1:
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line = fp.readline()
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if line == "":
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raise IOError("Connection closed")
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if line == '\r\n' or line == '\n':
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continue
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length = int(line,16)
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if not length:
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break
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content += fp.read(length)
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line = fp.readline()
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if line != '\r\n':
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raise IOError("Malformed chunked body")
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while 1:
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line = fp.readline()
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if line == "":
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raise IOError("Connection closed")
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if line == '\r\n' or line == '\n':
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break
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return content
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def read_http_body(rfile, connection, headers, all):
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if headers.has_key('transfer-encoding'):
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if not ",".join(headers["transfer-encoding"]) == "chunked":
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raise IOError('Invalid transfer-encoding')
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content = read_chunked(rfile)
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elif headers.has_key("content-length"):
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content = rfile.read(int(headers["content-length"][0]))
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elif all:
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content = rfile.read()
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connection.close = True
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else:
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content = None
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return content
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def parse_url(url):
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"""
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Returns a (scheme, host, port, path) tuple, or None on error.
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"""
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scheme, netloc, path, params, query, fragment = urlparse.urlparse(url)
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if not scheme:
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return None
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if ':' in netloc:
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host, port = string.split(netloc, ':')
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port = int(port)
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else:
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host = netloc
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if scheme == "https":
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port = 443
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else:
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port = 80
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path = urlparse.urlunparse(('', '', path, params, query, fragment))
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if not path:
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path = "/"
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return scheme, host, port, path
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def parse_request_line(request):
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"""
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Parse a proxy request line. Return (method, scheme, host, port, path).
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Raise ProxyError on error.
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"""
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try:
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method, url, protocol = string.split(request)
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except ValueError:
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raise ProxyError(400, "Can't parse request")
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if method == 'CONNECT':
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scheme = None
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path = None
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try:
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host, port = url.split(":")
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except ValueError:
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raise ProxyError(400, "Can't parse request")
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port = int(port)
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else:
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if url.startswith("/") or url == "*":
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scheme, port, host, path = None, None, None, url
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else:
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parts = parse_url(url)
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if not parts:
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raise ProxyError(400, "Invalid url: %s"%url)
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scheme, host, port, path = parts
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if not protocol.startswith("HTTP/"):
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raise ProxyError(400, "Unsupported protocol")
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major,minor = protocol.split('/')[1].split('.')
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major = int(major)
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minor = int(minor)
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if major != 1:
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raise ProxyError(400, "Unsupported protocol")
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return method, scheme, host, port, path, minor
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class Request(controller.Msg):
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FMT = '%s %s HTTP/1.1\r\n%s\r\n%s'
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FMT_PROXY = '%s %s://%s:%s%s HTTP/1.1\r\n%s\r\n%s'
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def __init__(self, client_conn, host, port, scheme, method, path, headers, content, timestamp=None):
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self.client_conn = client_conn
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self.host, self.port, self.scheme = host, port, scheme
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self.method, self.path, self.headers, self.content = method, path, headers, content
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self.timestamp = timestamp or time.time()
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self.close = False
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controller.Msg.__init__(self)
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def is_cached(self):
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return False
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def get_state(self):
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return dict(
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host = self.host,
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port = self.port,
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scheme = self.scheme,
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method = self.method,
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path = self.path,
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headers = self.headers.get_state(),
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content = self.content,
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timestamp = self.timestamp,
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)
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@classmethod
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def from_state(klass, client_conn, state):
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return klass(
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client_conn,
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state["host"],
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state["port"],
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state["scheme"],
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state["method"],
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state["path"],
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utils.Headers.from_state(state["headers"]),
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state["content"],
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state["timestamp"]
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)
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def __eq__(self, other):
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return self.get_state() == other.get_state()
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def copy(self):
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c = copy.copy(self)
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c.headers = self.headers.copy()
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return c
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def hostport(self):
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if (self.port, self.scheme) in [(80, "http"), (443, "https")]:
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host = self.host
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else:
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host = "%s:%s"%(self.host, self.port)
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return host
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def url(self):
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return "%s://%s%s"%(self.scheme, self.hostport(), self.path)
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def set_url(self, url):
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parts = parse_url(url)
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if not parts:
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return False
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self.scheme, self.host, self.port, self.path = parts
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return True
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def is_response(self):
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return False
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def short(self):
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return "%s %s"%(self.method, self.url())
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def assemble_proxy(self):
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return self.assemble(True)
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def assemble(self, _proxy = False):
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"""
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Assembles the request for transmission to the server. We make some
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modifications to make sure interception works properly.
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"""
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headers = self.headers.copy()
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utils.try_del(headers, 'accept-encoding')
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utils.try_del(headers, 'proxy-connection')
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utils.try_del(headers, 'keep-alive')
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utils.try_del(headers, 'connection')
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utils.try_del(headers, 'content-length')
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utils.try_del(headers, 'transfer-encoding')
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if not headers.has_key('host'):
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headers["host"] = [self.hostport()]
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content = self.content
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if content is not None:
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headers["content-length"] = [str(len(content))]
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else:
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content = ""
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if self.close:
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headers["connection"] = ["close"]
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if not _proxy:
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return self.FMT % (self.method, self.path, str(headers), content)
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else:
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return self.FMT_PROXY % (self.method, self.scheme, self.host, self.port, self.path, str(headers), content)
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class Response(controller.Msg):
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FMT = '%s\r\n%s\r\n%s'
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def __init__(self, request, code, msg, headers, content, timestamp=None):
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self.request = request
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self.code, self.msg = code, msg
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self.headers, self.content = headers, content
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self.timestamp = timestamp or time.time()
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self.cached = False
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controller.Msg.__init__(self)
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def get_state(self):
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return dict(
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code = self.code,
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proto = self.proto,
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msg = self.msg,
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headers = self.headers.get_state(),
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timestamp = self.timestamp,
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content = self.content
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)
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@classmethod
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def from_state(klass, request, state):
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return klass(
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request,
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state["code"],
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state["proto"],
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state["msg"],
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utils.Headers.from_state(state["headers"]),
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state["content"],
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state["timestamp"],
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)
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def __eq__(self, other):
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return self.get_state() == other.get_state()
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def copy(self):
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c = copy.copy(self)
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c.headers = self.headers.copy()
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return c
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def is_response(self):
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return True
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def is_cached(self):
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return self.cached
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def short(self):
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return "%s %s"%(self.code, self.msg)
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def assemble(self):
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"""
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Assembles the response for transmission to the client. We make some
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modifications to make sure interception works properly.
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"""
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headers = self.headers.copy()
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utils.try_del(headers, 'accept-encoding')
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utils.try_del(headers, 'proxy-connection')
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utils.try_del(headers, 'connection')
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utils.try_del(headers, 'keep-alive')
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utils.try_del(headers, 'transfer-encoding')
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content = self.content
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if content is not None:
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headers["content-length"] = [str(len(content))]
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else:
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content = ""
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if self.request.client_conn.close:
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headers["connection"] = ["close"]
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proto = "HTTP/1.1 %s %s"%(self.code, self.msg)
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data = (proto, str(headers), content)
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return self.FMT%data
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class ClientConnection(controller.Msg):
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def __init__(self, address):
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"""
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address is an (address, port) tuple, or None if this connection has
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been replayed from within mitmproxy.
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"""
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self.address = address
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self.close = False
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controller.Msg.__init__(self)
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def get_state(self):
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return self.address
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@classmethod
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def from_state(klass, state):
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return klass(state)
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def set_replay(self):
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self.address = None
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def is_replay(self):
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if self.address:
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return False
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else:
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return True
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def copy(self):
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return copy.copy(self)
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class Error(controller.Msg):
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def __init__(self, client_conn, msg, timestamp=None):
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self.client_conn, self.msg = client_conn, msg
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self.timestamp = timestamp or time.time()
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controller.Msg.__init__(self)
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def copy(self):
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return copy.copy(self)
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def get_state(self):
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return dict(
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msg = self.msg,
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timestamp = self.timestamp,
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)
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@classmethod
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def from_state(klass, state):
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return klass(
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None,
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state["msg"],
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state["timestamp"],
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)
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def __eq__(self, other):
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return self.get_state() == other.get_state()
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class FileLike:
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def __init__(self, o):
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self.o = o
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def __getattr__(self, attr):
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return getattr(self.o, attr)
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def flush(self):
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pass
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def read(self, length):
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result = ''
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while len(result) < length:
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data = self.o.read(length)
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if not data:
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break
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result += data
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return result
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def readline(self):
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result = ''
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while True:
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ch = self.read(1)
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if not ch:
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break
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else:
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result += ch
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if ch == '\n':
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break
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return result
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#begin nocover
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class ServerConnection:
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def __init__(self, request):
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self.host = request.host
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self.port = request.port
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self.scheme = request.scheme
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self.close = False
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self.server, self.rfile, self.wfile = None, None, None
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self.connect()
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def connect(self):
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try:
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addr = socket.gethostbyname(self.host)
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server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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if self.scheme == "https":
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server = ssl.wrap_socket(server)
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server.connect((addr, self.port))
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except socket.error, err:
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raise ProxyError(504, 'Error connecting to "%s": %s' % (self.host, err))
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self.server = server
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self.rfile, self.wfile = server.makefile('rb'), server.makefile('wb')
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def send_request(self, request):
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self.request = request
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request.close = self.close
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try:
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self.wfile.write(request.assemble())
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self.wfile.flush()
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except socket.error, err:
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raise ProxyError(504, 'Error sending data to "%s": %s' % (request.host, err))
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def read_response(self):
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line = self.rfile.readline()
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if line == "\r\n" or line == "\n": # Possible leftover from previous message
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line = self.rfile.readline()
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if not line:
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raise ProxyError(502, "Blank server response.")
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parts = line.strip().split(" ", 2)
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if not len(parts) == 3:
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raise ProxyError(502, "Invalid server response: %s."%line)
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proto, code, msg = parts
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code = int(code)
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headers = utils.Headers()
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headers.read(self.rfile)
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if code >= 100 and code <= 199:
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return self.read_response()
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if self.request.method == "HEAD" or code == 204 or code == 304:
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content = None
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else:
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content = read_http_body(self.rfile, self, headers, True)
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return Response(self.request, code, msg, headers, content)
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def terminate(self):
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try:
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if not self.wfile.closed:
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self.wfile.flush()
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self.server.close()
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except IOError:
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pass
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class ProxyHandler(SocketServer.StreamRequestHandler):
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def __init__(self, request, client_address, server, q):
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self.mqueue = q
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SocketServer.StreamRequestHandler.__init__(self, request, client_address, server)
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def handle(self):
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cc = ClientConnection(self.client_address)
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cc.send(self.mqueue)
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while not cc.close:
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self.handle_request(cc)
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self.finish()
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def handle_request(self, cc):
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server = None
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try:
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request = self.read_request(cc)
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if request is None:
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cc.close = True
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return
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request = request.send(self.mqueue)
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if request is None:
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cc.close = True
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return
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if request.is_response():
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response = request
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request = False
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response = response.send(self.mqueue)
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else:
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server = ServerConnection(request)
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server.send_request(request)
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response = server.read_response()
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response = response.send(self.mqueue)
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if response is None:
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server.terminate()
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if response is None:
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cc.close = True
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return
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self.send_response(response)
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except IOError:
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pass
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except ProxyError, e:
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err = Error(cc, e.msg)
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err.send(self.mqueue)
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cc.close = True
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self.send_error(e.code, e.msg)
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if server:
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server.terminate()
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def read_request(self, client_conn):
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line = self.rfile.readline()
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if line == "\r\n" or line == "\n": # Possible leftover from previous message
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line = self.rfile.readline()
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if line == "":
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return None
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method, scheme, host, port, path, httpminor = parse_request_line(line)
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if method == "CONNECT":
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# Discard additional headers sent to the proxy. Should I expose
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# these to users?
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while 1:
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d = self.rfile.readline()
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if d == '\r\n' or d == '\n':
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break
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self.wfile.write(
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'HTTP/1.1 200 Connection established\r\n' +
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('Proxy-agent: %s\r\n'%NAME) +
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'\r\n'
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)
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self.wfile.flush()
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self.connection = ssl.wrap_socket(
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self.connection,
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certfile = config.pemfile,
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keyfile = config.pemfile,
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server_side = True,
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ssl_version = ssl.PROTOCOL_SSLv23,
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do_handshake_on_connect = False
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)
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self.rfile = FileLike(self.connection)
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self.wfile = FileLike(self.connection)
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method, scheme, host, port, path, httpminor = parse_request_line(self.rfile.readline())
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if scheme is None:
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scheme = "https"
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headers = utils.Headers()
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headers.read(self.rfile)
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if host is None and headers.has_key("host"):
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netloc = headers["host"][0]
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if ':' in netloc:
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host, port = string.split(netloc, ':')
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port = int(port)
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else:
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host = netloc
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if scheme == "https":
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port = 443
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else:
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port = 80
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port = int(port)
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if host is None:
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raise ProxyError(400, 'Invalid request: %s'%request)
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if headers.has_key('expect'):
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expect = ",".join(headers['expect'])
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if expect == "100-continue" and httpminor >= 1:
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self.wfile.write('HTTP/1.1 100 Continue\r\n')
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self.wfile.write('Proxy-agent: %s\r\n'%NAME)
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self.wfile.write('\r\n')
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del headers['expect']
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else:
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raise ProxyError(417, 'Unmet expect: %s'%expect)
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if httpminor == 0:
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client_conn.close = True
|
|
if headers.has_key('connection'):
|
|
for value in ",".join(headers['connection']).split(","):
|
|
value = value.strip()
|
|
if value == "close":
|
|
client_conn.close = True
|
|
if value == "keep-alive":
|
|
client_conn.close = False
|
|
content = read_http_body(self.rfile, client_conn, headers, False)
|
|
return Request(client_conn, host, port, scheme, method, path, headers, content)
|
|
|
|
def send_response(self, response):
|
|
self.wfile.write(response.assemble())
|
|
self.wfile.flush()
|
|
|
|
def terminate(self, connection, wfile, rfile):
|
|
self.request.close()
|
|
try:
|
|
if not getattr(wfile, "closed", False):
|
|
wfile.flush()
|
|
connection.close()
|
|
except IOError:
|
|
pass
|
|
|
|
def finish(self):
|
|
self.terminate(self.connection, self.wfile, self.rfile)
|
|
|
|
def send_error(self, code, body):
|
|
try:
|
|
import BaseHTTPServer
|
|
response = BaseHTTPServer.BaseHTTPRequestHandler.responses[code][0]
|
|
self.wfile.write("HTTP/1.1 %s %s\r\n" % (code, response))
|
|
self.wfile.write("Server: %s\r\n"%NAME)
|
|
self.wfile.write("Connection: close\r\n")
|
|
self.wfile.write("Content-type: text/html\r\n")
|
|
self.wfile.write("\r\n")
|
|
self.wfile.write('<html><head>\n<title>%d %s</title>\n</head>\n'
|
|
'<body>\n%s\n</body>\n</html>' % (code, response, body))
|
|
self.wfile.flush()
|
|
except IOError:
|
|
pass
|
|
|
|
|
|
ServerBase = SocketServer.ThreadingTCPServer
|
|
ServerBase.daemon_threads = True # Terminate workers when main thread terminates
|
|
class ProxyServer(ServerBase):
|
|
request_queue_size = 20
|
|
allow_reuse_address = True
|
|
def __init__(self, port, address=''):
|
|
self.port, self.address = port, address
|
|
ServerBase.__init__(self, (address, port), ProxyHandler)
|
|
self.masterq = None
|
|
|
|
def set_mqueue(self, q):
|
|
self.masterq = q
|
|
|
|
def process_request(self, request, client_address):
|
|
return ServerBase.process_request(self, request, client_address)
|
|
|
|
def finish_request(self, request, client_address):
|
|
self.RequestHandlerClass(request, client_address, self, self.masterq)
|
|
|