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utils.py
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130 lines (116 loc) · 3.33 KB
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# -*- coding: utf-8 -*-
"""
FileName: utils
Author: Tao Hao
@contact: [email protected]
Created time: 2019/5/30
Description:
Changelog:
"""
import errno
ERRNO_WOULDBLOCK = (errno.EWOULDBLOCK, errno.EAGAIN)
if hasattr(errno, "WSAEWOULDBLOCK"):
ERRNO_WOULDBLOCK += (errno.WSAEWOULDBLOCK,) # type: ignore
def errno_from_exception(e):
if hasattr(e, 'errno'):
return e.errno # type: ignore
elif e.args:
return e.args[0]
else:
return None
STATUS_CODES = {
100: b"Continue",
101: b"Switching Protocols",
102: b"Processing",
200: b"OK",
201: b"Created",
202: b"Accepted",
203: b"Non-Authoritative Information",
204: b"No Content",
205: b"Reset Content",
206: b"Partial Content",
207: b"Multi-Status",
208: b"Already Reported",
226: b"IM Used",
300: b"Multiple Choices",
301: b"Moved Permanently",
302: b"Found",
303: b"See Other",
304: b"Not Modified",
305: b"Use Proxy",
307: b"Temporary Redirect",
308: b"Permanent Redirect",
400: b"Bad Request",
401: b"Unauthorized",
402: b"Payment Required",
403: b"Forbidden",
404: b"Not Found",
405: b"Method Not Allowed",
406: b"Not Acceptable",
407: b"Proxy Authentication Required",
408: b"Request Timeout",
409: b"Conflict",
410: b"Gone",
411: b"Length Required",
412: b"Precondition Failed",
413: b"Request Entity Too Large",
414: b"Request-URI Too Long",
415: b"Unsupported Media Type",
416: b"Requested Range Not Satisfiable",
417: b"Expectation Failed",
418: b"I'm a teapot",
422: b"Unprocessable Entity",
423: b"Locked",
424: b"Failed Dependency",
426: b"Upgrade Required",
428: b"Precondition Required",
429: b"Too Many Requests",
431: b"Request Header Fields Too Large",
451: b"Unavailable For Legal Reasons",
500: b"Internal Server Error",
501: b"Not Implemented",
502: b"Bad Gateway",
503: b"Service Unavailable",
504: b"Gateway Timeout",
505: b"HTTP Version Not Supported",
506: b"Variant Also Negotiates",
507: b"Insufficient Storage",
508: b"Loop Detected",
510: b"Not Extended",
511: b"Network Authentication Required",
}
# According to https://tools.ietf.org/html/rfc2616#section-7.1
_ENTITY_HEADERS = frozenset(
[
"allow",
"content-encoding",
"content-language",
"content-length",
"content-location",
"content-md5",
"content-range",
"content-type",
"expires",
"last-modified",
"extension-header",
]
)
def is_entity_header(header):
"""Checks if the given header is an Entity Header"""
return header.lower() in _ENTITY_HEADERS
def remove_entity_headers(headers, allowed=("content-location", "expires")):
"""
Removes all the entity headers present in the headers given.
According to RFC 2616 Section 10.3.5,
Content-Location and Expires are allowed as for the
"strong cache validator".
https://tools.ietf.org/html/rfc2616#section-10.3.5
returns the headers without the entity headers
"""
allowed = set([h.lower() for h in allowed])
headers = {
header: value
for header, value in headers.items()
if not is_entity_header(header) and header.lower() not in allowed
}
return headers