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from io import BytesIO
CHUNK_SIZE = 49600
HTTP_STATUS_CODES = {
100: "Continue",
101: "Switching Protocols",
102: "Processing",
200: "OK",
201: "Created",
202: "Accepted",
203: "Non Authoritative Information",
204: "No Content",
205: "Reset Content",
206: "Partial Content",
207: "Multi Status",
226: "IM Used", # see RFC 3229
300: "Multiple Choices",
301: "Moved Permanently",
302: "Found",
303: "See Other",
304: "Not Modified",
305: "Use Proxy",
307: "Temporary Redirect",
308: "Permanent Redirect",
400: "Bad Request",
401: "Unauthorized",
402: "Payment Required", # unused
403: "Forbidden",
404: "Not Found",
405: "Method Not Allowed",
406: "Not Acceptable",
407: "Proxy Authentication Required",
408: "Request Timeout",
409: "Conflict",
410: "Gone",
411: "Length Required",
412: "Precondition Failed",
413: "Request Entity Too Large",
414: "Request URI Too Long",
415: "Unsupported Media Type",
416: "Requested Range Not Satisfiable",
417: "Expectation Failed",
418: "I'm a teapot", # see RFC 2324
421: "Misdirected Request", # see RFC 7540
422: "Unprocessable Entity",
423: "Locked",
424: "Failed Dependency",
426: "Upgrade Required",
428: "Precondition Required", # see RFC 6585
429: "Too Many Requests",
431: "Request Header Fields Too Large",
449: "Retry With", # proprietary MS extension
451: "Unavailable For Legal Reasons",
500: "Internal Server Error",
501: "Not Implemented",
502: "Bad Gateway",
503: "Service Unavailable",
504: "Gateway Timeout",
505: "HTTP Version Not Supported",
507: "Insufficient Storage",
510: "Not Extended",
}
SUCCESS_CODE = 200
BAD_REQUEST_CODE = 400
NOT_FOUND_CODE = 404
METHOD_NOT_ALLOWED_CODE = 405
def render_template(path, **kwargs):
with open(path, encoding='utf-8') as f:
template = f.read()
for key in kwargs:
template = template.replace(f'%%{key}%%', kwargs[key])
return template
def parse_multipart_form(data: bytes):
b = BytesIO(data)
separator = b.readline().strip()
files = []
while True:
line = b.readline().strip().strip(b'-')
if not line:
break
headers_raw = []
while not line.strip() == b'':
headers_raw.append(line.strip().decode())
line = b.readline()
headers = {'Content-Type': headers_raw[1].split(': ')[1]}
for pair in headers_raw[0].split(': ')[1].split('; ')[1:]:
key, value = pair.split('=')
headers[key] = value[1:-1]
data = b''
prev_chunk = b.read(CHUNK_SIZE)
chunk = b.read(CHUNK_SIZE)
while separator not in (prev_chunk + chunk):
data += prev_chunk
prev_chunk = chunk
chunk = b.read(CHUNK_SIZE)
if not chunk:
break
chunk = (prev_chunk + chunk)
if chunk.startswith(separator) or chunk.endswith(separator):
with_sep = chunk.strip(separator)
else:
if separator in chunk:
with_sep, buffer = chunk.split(separator)
b = BytesIO(buffer + b.read())
b.readline()
else:
with_sep = chunk
data += with_sep
headers['data'] = data
files.append(headers)
return files
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