388 lines
11 KiB
Python
388 lines
11 KiB
Python
import asyncio
|
|
import json
|
|
import sys
|
|
|
|
from cgi import parse_header
|
|
from collections import namedtuple
|
|
from http.cookies import SimpleCookie
|
|
from urllib.parse import parse_qs, urlunparse
|
|
|
|
from httptools import parse_url
|
|
|
|
from sanic.exceptions import InvalidUsage
|
|
from sanic.log import error_logger, logger
|
|
|
|
|
|
try:
|
|
from ujson import loads as json_loads
|
|
except ImportError:
|
|
if sys.version_info[:2] == (3, 5):
|
|
|
|
def json_loads(data):
|
|
# on Python 3.5 json.loads only supports str not bytes
|
|
return json.loads(data.decode())
|
|
|
|
else:
|
|
json_loads = json.loads
|
|
|
|
|
|
DEFAULT_HTTP_CONTENT_TYPE = "application/octet-stream"
|
|
|
|
|
|
# HTTP/1.1: https://www.w3.org/Protocols/rfc2616/rfc2616-sec7.html#sec7.2.1
|
|
# > If the media type remains unknown, the recipient SHOULD treat it
|
|
# > as type "application/octet-stream"
|
|
|
|
|
|
class RequestParameters(dict):
|
|
"""Hosts a dict with lists as values where get returns the first
|
|
value of the list and getlist returns the whole shebang
|
|
"""
|
|
|
|
def get(self, name, default=None):
|
|
"""Return the first value, either the default or actual"""
|
|
return super().get(name, [default])[0]
|
|
|
|
def getlist(self, name, default=None):
|
|
"""Return the entire list"""
|
|
return super().get(name, default)
|
|
|
|
|
|
class StreamBuffer:
|
|
def __init__(self, buffer_size=100):
|
|
self._queue = asyncio.Queue(buffer_size)
|
|
|
|
async def read(self):
|
|
""" Stop reading when gets None """
|
|
payload = await self._queue.get()
|
|
self._queue.task_done()
|
|
return payload
|
|
|
|
async def put(self, payload):
|
|
await self._queue.put(payload)
|
|
|
|
def is_full(self):
|
|
return self._queue.full()
|
|
|
|
|
|
class Request(dict):
|
|
"""Properties of an HTTP request such as URL, headers, etc."""
|
|
|
|
__slots__ = (
|
|
"app",
|
|
"headers",
|
|
"version",
|
|
"method",
|
|
"_cookies",
|
|
"transport",
|
|
"body",
|
|
"parsed_json",
|
|
"parsed_args",
|
|
"parsed_form",
|
|
"parsed_files",
|
|
"_ip",
|
|
"_parsed_url",
|
|
"uri_template",
|
|
"stream",
|
|
"_remote_addr",
|
|
"_socket",
|
|
"_port",
|
|
"__weakref__",
|
|
"raw_url",
|
|
)
|
|
|
|
def __init__(self, url_bytes, headers, version, method, transport):
|
|
self.raw_url = url_bytes
|
|
# TODO: Content-Encoding detection
|
|
self._parsed_url = parse_url(url_bytes)
|
|
self.app = None
|
|
|
|
self.headers = headers
|
|
self.version = version
|
|
self.method = method
|
|
self.transport = transport
|
|
|
|
# Init but do not inhale
|
|
self.body_init()
|
|
self.parsed_json = None
|
|
self.parsed_form = None
|
|
self.parsed_files = None
|
|
self.parsed_args = None
|
|
self.uri_template = None
|
|
self._cookies = None
|
|
self.stream = None
|
|
|
|
def __repr__(self):
|
|
if self.method is None or not self.path:
|
|
return "<{0}>".format(self.__class__.__name__)
|
|
return "<{0}: {1} {2}>".format(
|
|
self.__class__.__name__, self.method, self.path
|
|
)
|
|
|
|
def __bool__(self):
|
|
if self.transport:
|
|
return True
|
|
return False
|
|
|
|
def body_init(self):
|
|
self.body = []
|
|
|
|
def body_push(self, data):
|
|
self.body.append(data)
|
|
|
|
def body_finish(self):
|
|
self.body = b"".join(self.body)
|
|
|
|
@property
|
|
def json(self):
|
|
if self.parsed_json is None:
|
|
self.load_json()
|
|
|
|
return self.parsed_json
|
|
|
|
def load_json(self, loads=json_loads):
|
|
try:
|
|
self.parsed_json = loads(self.body)
|
|
except Exception:
|
|
if not self.body:
|
|
return None
|
|
raise InvalidUsage("Failed when parsing body as json")
|
|
|
|
return self.parsed_json
|
|
|
|
@property
|
|
def token(self):
|
|
"""Attempt to return the auth header token.
|
|
|
|
:return: token related to request
|
|
"""
|
|
prefixes = ("Bearer", "Token")
|
|
auth_header = self.headers.get("Authorization")
|
|
|
|
if auth_header is not None:
|
|
for prefix in prefixes:
|
|
if prefix in auth_header:
|
|
return auth_header.partition(prefix)[-1].strip()
|
|
|
|
return auth_header
|
|
|
|
@property
|
|
def form(self):
|
|
if self.parsed_form is None:
|
|
self.parsed_form = RequestParameters()
|
|
self.parsed_files = RequestParameters()
|
|
content_type = self.headers.get(
|
|
"Content-Type", DEFAULT_HTTP_CONTENT_TYPE
|
|
)
|
|
content_type, parameters = parse_header(content_type)
|
|
try:
|
|
if content_type == "application/x-www-form-urlencoded":
|
|
self.parsed_form = RequestParameters(
|
|
parse_qs(self.body.decode("utf-8"))
|
|
)
|
|
elif content_type == "multipart/form-data":
|
|
# TODO: Stream this instead of reading to/from memory
|
|
boundary = parameters["boundary"].encode("utf-8")
|
|
self.parsed_form, self.parsed_files = parse_multipart_form(
|
|
self.body, boundary
|
|
)
|
|
except Exception:
|
|
error_logger.exception("Failed when parsing form")
|
|
|
|
return self.parsed_form
|
|
|
|
@property
|
|
def files(self):
|
|
if self.parsed_files is None:
|
|
self.form # compute form to get files
|
|
|
|
return self.parsed_files
|
|
|
|
@property
|
|
def args(self):
|
|
if self.parsed_args is None:
|
|
if self.query_string:
|
|
self.parsed_args = RequestParameters(
|
|
parse_qs(self.query_string)
|
|
)
|
|
else:
|
|
self.parsed_args = RequestParameters()
|
|
return self.parsed_args
|
|
|
|
@property
|
|
def raw_args(self):
|
|
return {k: v[0] for k, v in self.args.items()}
|
|
|
|
@property
|
|
def cookies(self):
|
|
if self._cookies is None:
|
|
cookie = self.headers.get("Cookie")
|
|
if cookie is not None:
|
|
cookies = SimpleCookie()
|
|
cookies.load(cookie)
|
|
self._cookies = {
|
|
name: cookie.value for name, cookie in cookies.items()
|
|
}
|
|
else:
|
|
self._cookies = {}
|
|
return self._cookies
|
|
|
|
@property
|
|
def ip(self):
|
|
if not hasattr(self, "_socket"):
|
|
self._get_address()
|
|
return self._ip
|
|
|
|
@property
|
|
def port(self):
|
|
if not hasattr(self, "_socket"):
|
|
self._get_address()
|
|
return self._port
|
|
|
|
@property
|
|
def socket(self):
|
|
if not hasattr(self, "_socket"):
|
|
self._get_address()
|
|
return self._socket
|
|
|
|
def _get_address(self):
|
|
self._socket = self.transport.get_extra_info("peername") or (
|
|
None,
|
|
None,
|
|
)
|
|
self._ip = self._socket[0]
|
|
self._port = self._socket[1]
|
|
|
|
@property
|
|
def remote_addr(self):
|
|
"""Attempt to return the original client ip based on X-Forwarded-For.
|
|
|
|
:return: original client ip.
|
|
"""
|
|
if not hasattr(self, "_remote_addr"):
|
|
forwarded_for = self.headers.get("X-Forwarded-For", "").split(",")
|
|
remote_addrs = [
|
|
addr
|
|
for addr in [addr.strip() for addr in forwarded_for]
|
|
if addr
|
|
]
|
|
if len(remote_addrs) > 0:
|
|
self._remote_addr = remote_addrs[0]
|
|
else:
|
|
self._remote_addr = ""
|
|
return self._remote_addr
|
|
|
|
@property
|
|
def scheme(self):
|
|
if (
|
|
self.app.websocket_enabled
|
|
and self.headers.get("upgrade") == "websocket"
|
|
):
|
|
scheme = "ws"
|
|
else:
|
|
scheme = "http"
|
|
|
|
if self.transport.get_extra_info("sslcontext"):
|
|
scheme += "s"
|
|
|
|
return scheme
|
|
|
|
@property
|
|
def host(self):
|
|
# it appears that httptools doesn't return the host
|
|
# so pull it from the headers
|
|
return self.headers.get("Host", "")
|
|
|
|
@property
|
|
def content_type(self):
|
|
return self.headers.get("Content-Type", DEFAULT_HTTP_CONTENT_TYPE)
|
|
|
|
@property
|
|
def match_info(self):
|
|
"""return matched info after resolving route"""
|
|
return self.app.router.get(self)[2]
|
|
|
|
@property
|
|
def path(self):
|
|
return self._parsed_url.path.decode("utf-8")
|
|
|
|
@property
|
|
def query_string(self):
|
|
if self._parsed_url.query:
|
|
return self._parsed_url.query.decode("utf-8")
|
|
else:
|
|
return ""
|
|
|
|
@property
|
|
def url(self):
|
|
return urlunparse(
|
|
(self.scheme, self.host, self.path, None, self.query_string, None)
|
|
)
|
|
|
|
|
|
File = namedtuple("File", ["type", "body", "name"])
|
|
|
|
|
|
def parse_multipart_form(body, boundary):
|
|
"""Parse a request body and returns fields and files
|
|
|
|
:param body: bytes request body
|
|
:param boundary: bytes multipart boundary
|
|
:return: fields (RequestParameters), files (RequestParameters)
|
|
"""
|
|
files = RequestParameters()
|
|
fields = RequestParameters()
|
|
|
|
form_parts = body.split(boundary)
|
|
for form_part in form_parts[1:-1]:
|
|
file_name = None
|
|
content_type = "text/plain"
|
|
content_charset = "utf-8"
|
|
field_name = None
|
|
line_index = 2
|
|
line_end_index = 0
|
|
while not line_end_index == -1:
|
|
line_end_index = form_part.find(b"\r\n", line_index)
|
|
form_line = form_part[line_index:line_end_index].decode("utf-8")
|
|
line_index = line_end_index + 2
|
|
|
|
if not form_line:
|
|
break
|
|
|
|
colon_index = form_line.index(":")
|
|
form_header_field = form_line[0:colon_index].lower()
|
|
form_header_value, form_parameters = parse_header(
|
|
form_line[colon_index + 2 :]
|
|
)
|
|
|
|
if form_header_field == "content-disposition":
|
|
file_name = form_parameters.get("filename")
|
|
field_name = form_parameters.get("name")
|
|
elif form_header_field == "content-type":
|
|
content_type = form_header_value
|
|
content_charset = form_parameters.get("charset", "utf-8")
|
|
|
|
if field_name:
|
|
post_data = form_part[line_index:-4]
|
|
if file_name:
|
|
form_file = File(
|
|
type=content_type, name=file_name, body=post_data
|
|
)
|
|
if field_name in files:
|
|
files[field_name].append(form_file)
|
|
else:
|
|
files[field_name] = [form_file]
|
|
else:
|
|
value = post_data.decode(content_charset)
|
|
if field_name in fields:
|
|
fields[field_name].append(value)
|
|
else:
|
|
fields[field_name] = [value]
|
|
else:
|
|
logger.debug(
|
|
"Form-data field does not have a 'name' parameter "
|
|
"in the Content-Disposition header"
|
|
)
|
|
|
|
return fields, files
|