Current File : //lib/python3/dist-packages/mitmproxy/net/http/multipart.py
import re
import mimetypes
from urllib.parse import quote
from mitmproxy.net.http import headers
def encode(head, l):
k = head.get("content-type")
if k:
k = headers.parse_content_type(k)
if k is not None:
try:
boundary = k[2]["boundary"].encode("ascii")
boundary = quote(boundary)
except (KeyError, UnicodeError):
return b""
hdrs = []
for key, value in l:
file_type = mimetypes.guess_type(str(key))[0] or "text/plain; charset=utf-8"
if key:
hdrs.append(b"--%b" % boundary.encode('utf-8'))
disposition = b'form-data; name="%b"' % key
hdrs.append(b"Content-Disposition: %b" % disposition)
hdrs.append(b"Content-Type: %b" % file_type.encode('utf-8'))
hdrs.append(b'')
hdrs.append(value)
hdrs.append(b'')
if value is not None:
# If boundary is found in value then raise ValueError
if re.search(rb"^--%b$" % re.escape(boundary.encode('utf-8')), value):
raise ValueError(b"boundary found in encoded string")
hdrs.append(b"--%b--\r\n" % boundary.encode('utf-8'))
temp = b"\r\n".join(hdrs)
return temp
def decode(hdrs, content):
"""
Takes a multipart boundary encoded string and returns list of (key, value) tuples.
"""
v = hdrs.get("content-type")
if v:
v = headers.parse_content_type(v)
if not v:
return []
try:
boundary = v[2]["boundary"].encode("ascii")
except (KeyError, UnicodeError):
return []
rx = re.compile(br'\bname="([^"]+)"')
r = []
if content is not None:
for i in content.split(b"--" + boundary):
parts = i.splitlines()
if len(parts) > 1 and parts[0][0:2] != b"--":
match = rx.search(parts[1])
if match:
key = match.group(1)
value = b"".join(parts[3 + parts[2:].index(b""):])
r.append((key, value))
return r
return []
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