FM / python3.12

/snap/core24/1587/usr/lib/python3.12

Name	Size	Mode	Actions
asyncio/	-	0755	rm
collections/	-	0755	rm
concurrent/	-	0755	rm
ctypes/	-	0755	rm
curses/	-	0755	rm
dbm/	-	0755	rm
email/	-	0755	rm
encodings/	-	0755	rm
html/	-	0755	rm
http/	-	0755	rm
importlib/	-	0755	rm
json/	-	0755	rm
lib-dynload/	-	0755	rm
logging/	-	0755	rm
multiprocessing/	-	0755	rm
pydoc_data/	-	0755	rm
re/	-	0755	rm
sqlite3/	-	0755	rm
test/	-	0755	rm
tomllib/	-	0755	rm
unittest/	-	0755	rm
urllib/	-	0755	rm
venv/	-	0755	rm
wsgiref/	-	0755	rm
xml/	-	0755	rm
xmlrpc/	-	0755	rm
zipfile/	-	0755	rm
zoneinfo/	-	0755	rm
__phello__/	-	0755	rm
__pycache__/	-	0755	rm
abc.py	6538	0644	edit dl rm
aifc.py	34211	0644	edit dl rm
antigravity.py	500	0644	edit dl rm
argparse.py	101750	0644	edit dl rm
ast.py	64260	0644	edit dl rm
base64.py	20602	0755	edit dl rm
bdb.py	32463	0644	edit dl rm
bisect.py	3423	0644	edit dl rm
bz2.py	11847	0644	edit dl rm
calendar.py	25418	0644	edit dl rm
cgi.py	34418	0755	edit dl rm
cgitb.py	12421	0644	edit dl rm
chunk.py	5500	0644	edit dl rm
cmd.py	14873	0644	edit dl rm
code.py	10695	0644	edit dl rm
codecs.py	36870	0644	edit dl rm
codeop.py	5908	0644	edit dl rm
colorsys.py	4062	0644	edit dl rm
compileall.py	20598	0644	edit dl rm
configparser.py	53789	0644	edit dl rm
contextlib.py	27637	0644	edit dl rm
contextvars.py	129	0644	edit dl rm
copy.py	8412	0644	edit dl rm
copyreg.py	7614	0644	edit dl rm
cProfile.py	6555	0755	edit dl rm
crypt.py	3913	0644	edit dl rm
csv.py	16386	0644	edit dl rm
dataclasses.py	61753	0644	edit dl rm
datetime.py	268	0644	edit dl rm
decimal.py	320	0644	edit dl rm
difflib.py	83308	0644	edit dl rm
dis.py	30209	0644	edit dl rm
doctest.py	106479	0644	edit dl rm
enum.py	81636	0644	edit dl rm
EXTERNALLY-MANAGED	645	0644	edit dl rm
filecmp.py	10187	0644	edit dl rm
fileinput.py	15714	0644	edit dl rm
fnmatch.py	5999	0644	edit dl rm
fractions.py	38067	0644	edit dl rm
ftplib.py	34735	0644	edit dl rm
functools.py	38126	0644	edit dl rm
genericpath.py	5572	0644	edit dl rm
getopt.py	7488	0644	edit dl rm
getpass.py	5990	0644	edit dl rm
gettext.py	21747	0644	edit dl rm
glob.py	8732	0644	edit dl rm
graphlib.py	9656	0644	edit dl rm
gzip.py	24859	0644	edit dl rm
hashlib.py	9349	0644	edit dl rm
heapq.py	23024	0644	edit dl rm
hmac.py	7716	0644	edit dl rm
imaplib.py	53688	0644	edit dl rm
imghdr.py	4398	0644	edit dl rm
inspect.py	125420	0644	edit dl rm
io.py	3582	0644	edit dl rm
ipaddress.py	78294	0644	edit dl rm
keyword.py	1073	0644	edit dl rm
LICENSE.txt	13936	0644	edit dl rm
linecache.py	5649	0644	edit dl rm
locale.py	78562	0644	edit dl rm
lzma.py	13277	0644	edit dl rm
mailbox.py	78911	0644	edit dl rm
mailcap.py	9333	0644	edit dl rm
mimetypes.py	22888	0644	edit dl rm
modulefinder.py	23699	0644	edit dl rm
netrc.py	6922	0644	edit dl rm
nntplib.py	41087	0644	edit dl rm
ntpath.py	30027	0644	edit dl rm
nturl2path.py	2887	0644	edit dl rm
numbers.py	11467	0644	edit dl rm
opcode.py	13174	0644	edit dl rm
operator.py	10965	0644	edit dl rm
optparse.py	60369	0644	edit dl rm
os.py	39786	0644	edit dl rm
pathlib.py	51153	0644	edit dl rm
pdb.py	69459	0755	edit dl rm
pickle.py	64901	0644	edit dl rm
pickletools.py	93861	0644	edit dl rm
pipes.py	8978	0644	edit dl rm
pkgutil.py	18281	0644	edit dl rm
platform.py	43331	0755	edit dl rm
plistlib.py	28582	0644	edit dl rm
poplib.py	14163	0644	edit dl rm
posixpath.py	17623	0644	edit dl rm
pprint.py	24158	0644	edit dl rm
profile.py	23092	0755	edit dl rm
pstats.py	29289	0644	edit dl rm
pty.py	6137	0644	edit dl rm
pyclbr.py	11396	0644	edit dl rm
pydoc.py	113090	0755	edit dl rm
py_compile.py	7878	0644	edit dl rm
queue.py	11496	0644	edit dl rm
quopri.py	7183	0755	edit dl rm
random.py	34683	0644	edit dl rm
reprlib.py	6569	0644	edit dl rm
rlcompleter.py	7827	0644	edit dl rm
runpy.py	12898	0644	edit dl rm
sched.py	6351	0644	edit dl rm
secrets.py	1984	0644	edit dl rm
selectors.py	19671	0644	edit dl rm
shelve.py	8560	0644	edit dl rm
shlex.py	13353	0644	edit dl rm
shutil.py	58120	0644	edit dl rm
signal.py	2495	0644	edit dl rm
site.py	23903	0644	edit dl rm
sitecustomize.py	-	0	edit dl rm
smtplib.py	43531	0755	edit dl rm
sndhdr.py	7448	0644	edit dl rm
socket.py	37411	0644	edit dl rm
socketserver.py	27851	0644	edit dl rm
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ssl.py	50822	0644	edit dl rm
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string.py	11786	0644	edit dl rm
stringprep.py	12917	0644	edit dl rm
struct.py	257	0644	edit dl rm
subprocess.py	88725	0644	edit dl rm
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symtable.py	10753	0644	edit dl rm
sysconfig.py	32768	0644	edit dl rm
tabnanny.py	11530	0755	edit dl rm
tarfile.py	112555	0755	edit dl rm
telnetlib.py	23301	0644	edit dl rm
tempfile.py	37334	0644	edit dl rm
textwrap.py	19718	0644	edit dl rm
this.py	1003	0644	edit dl rm
threading.py	60123	0644	edit dl rm
timeit.py	13463	0755	edit dl rm
token.py	2479	0644	edit dl rm
tokenize.py	21214	0644	edit dl rm
trace.py	29182	0755	edit dl rm
traceback.py	46325	0644	edit dl rm
tracemalloc.py	18047	0644	edit dl rm
tty.py	2035	0644	edit dl rm
turtle.py	146361	0644	edit dl rm
types.py	10993	0644	edit dl rm
typing.py	117428	0644	edit dl rm
uu.py	7364	0755	edit dl rm
uuid.py	29656	0644	edit dl rm
warnings.py	21760	0644	edit dl rm
wave.py	22769	0644	edit dl rm
weakref.py	21513	0644	edit dl rm
webbrowser.py	23627	0755	edit dl rm
xdrlib.py	5942	0644	edit dl rm
zipapp.py	7543	0644	edit dl rm
zipimport.py	28132	0644	edit dl rm
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_distutils_system_mod.py	5716	0644	edit dl rm
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_pydatetime.py	92097	0644	edit dl rm
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_pyio.py	93593	0644	edit dl rm
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_weakrefset.py	5893	0644	edit dl rm
__future__.py	5218	0644	edit dl rm
__hello__.py	227	0644	edit dl rm

Edit: /snap/core24/1587/usr/lib/python3.12/cgi.py (34418B)

#! /usr/bin/python3.12

# NOTE: the above "/usr/local/bin/python" is NOT a mistake.  It is
# intentionally NOT "/usr/bin/env python".  On many systems
# (e.g. Solaris), /usr/local/bin is not in $PATH as passed to CGI
# scripts, and /usr/local/bin is the default directory where Python is
# installed, so /usr/bin/env would be unable to find python.  Granted,
# binary installations by Linux vendors often install Python in
# /usr/bin.  So let those vendors patch cgi.py to match their choice
# of installation.

"""Support module for CGI (Common Gateway Interface) scripts.

This module defines a number of utilities for use by CGI scripts
written in Python.

The global variable maxlen can be set to an integer indicating the maximum size
of a POST request. POST requests larger than this size will result in a
ValueError being raised during parsing. The default value of this variable is 0,
meaning the request size is unlimited.
"""

# History
# -------
#
# Michael McLay started this module.  Steve Majewski changed the
# interface to SvFormContentDict and FormContentDict.  The multipart
# parsing was inspired by code submitted by Andreas Paepcke.  Guido van
# Rossum rewrote, reformatted and documented the module and is currently
# responsible for its maintenance.
#

__version__ = "2.6"

# Imports
# =======

from io import StringIO, BytesIO, TextIOWrapper
from collections.abc import Mapping
import sys
import os
import urllib.parse
from email.parser import FeedParser
from email.message import Message
import html
import locale
import tempfile
import warnings

__all__ = ["MiniFieldStorage", "FieldStorage", "parse", "parse_multipart",
           "parse_header", "test", "print_exception", "print_environ",
           "print_form", "print_directory", "print_arguments",
           "print_environ_usage"]

warnings._deprecated(__name__, remove=(3,13))

# Logging support
# ===============

logfile = ""            # Filename to log to, if not empty
logfp = None            # File object to log to, if not None

def initlog(*allargs):
    """Write a log message, if there is a log file.

Even though this function is called initlog(), you should always
    use log(); log is a variable that is set either to initlog
    (initially), to dolog (once the log file has been opened), or to
    nolog (when logging is disabled).

The first argument is a format string; the remaining arguments (if
    any) are arguments to the % operator, so e.g.
        log("%s: %s", "a", "b")
    will write "a: b" to the log file, followed by a newline.

If the global logfp is not None, it should be a file object to
    which log data is written.

If the global logfp is None, the global logfile may be a string
    giving a filename to open, in append mode.  This file should be
    world writable!!!  If the file can't be opened, logging is
    silently disabled (since there is no safe place where we could
    send an error message).

"""
    global log, logfile, logfp
    warnings.warn("cgi.log() is deprecated as of 3.10. Use logging instead",
                  DeprecationWarning, stacklevel=2)
    if logfile and not logfp:
        try:
            logfp = open(logfile, "a", encoding="locale")
        except OSError:
            pass
    if not logfp:
        log = nolog
    else:
        log = dolog
    log(*allargs)

def dolog(fmt, *args):
    """Write a log message to the log file.  See initlog() for docs."""
    logfp.write(fmt%args + "\n")

def nolog(*allargs):
    """Dummy function, assigned to log when logging is disabled."""
    pass

def closelog():
    """Close the log file."""
    global log, logfile, logfp
    logfile = ''
    if logfp:
        logfp.close()
        logfp = None
    log = initlog

log = initlog           # The current logging function

# Parsing functions
# =================

# Maximum input we will accept when REQUEST_METHOD is POST
# 0 ==> unlimited input
maxlen = 0

def parse(fp=None, environ=os.environ, keep_blank_values=0,
          strict_parsing=0, separator='&'):
    """Parse a query in the environment or from a file (default stdin)

Arguments, all optional:

fp              : file pointer; default: sys.stdin.buffer

environ         : environment dictionary; default: os.environ

keep_blank_values: flag indicating whether blank values in
            percent-encoded forms should be treated as blank strings.
            A true value indicates that blanks should be retained as
            blank strings.  The default false value indicates that
            blank values are to be ignored and treated as if they were
            not included.

strict_parsing: flag indicating what to do with parsing errors.
            If false (the default), errors are silently ignored.
            If true, errors raise a ValueError exception.

separator: str. The symbol to use for separating the query arguments.
            Defaults to &.
    """
    if fp is None:
        fp = sys.stdin

# field keys and values (except for files) are returned as strings
    # an encoding is required to decode the bytes read from self.fp
    if hasattr(fp,'encoding'):
        encoding = fp.encoding
    else:
        encoding = 'latin-1'

# fp.read() must return bytes
    if isinstance(fp, TextIOWrapper):
        fp = fp.buffer

if not 'REQUEST_METHOD' in environ:
        environ['REQUEST_METHOD'] = 'GET'       # For testing stand-alone
    if environ['REQUEST_METHOD'] == 'POST':
        ctype, pdict = parse_header(environ['CONTENT_TYPE'])
        if ctype == 'multipart/form-data':
            return parse_multipart(fp, pdict, separator=separator)
        elif ctype == 'application/x-www-form-urlencoded':
            clength = int(environ['CONTENT_LENGTH'])
            if maxlen and clength > maxlen:
                raise ValueError('Maximum content length exceeded')
            qs = fp.read(clength).decode(encoding)
        else:
            qs = ''                     # Unknown content-type
        if 'QUERY_STRING' in environ:
            if qs: qs = qs + '&'
            qs = qs + environ['QUERY_STRING']
        elif sys.argv[1:]:
            if qs: qs = qs + '&'
            qs = qs + sys.argv[1]
        environ['QUERY_STRING'] = qs    # XXX Shouldn't, really
    elif 'QUERY_STRING' in environ:
        qs = environ['QUERY_STRING']
    else:
        if sys.argv[1:]:
            qs = sys.argv[1]
        else:
            qs = ""
        environ['QUERY_STRING'] = qs    # XXX Shouldn't, really
    return urllib.parse.parse_qs(qs, keep_blank_values, strict_parsing,
                                 encoding=encoding, separator=separator)

def parse_multipart(fp, pdict, encoding="utf-8", errors="replace", separator='&'):
    """Parse multipart input.

Arguments:
    fp   : input file
    pdict: dictionary containing other parameters of content-type header
    encoding, errors: request encoding and error handler, passed to
        FieldStorage

Returns a dictionary just like parse_qs(): keys are the field names, each
    value is a list of values for that field. For non-file fields, the value
    is a list of strings.
    """
    # RFC 2046, Section 5.1 : The "multipart" boundary delimiters are always
    # represented as 7bit US-ASCII.
    boundary = pdict['boundary'].decode('ascii')
    ctype = "multipart/form-data; boundary={}".format(boundary)
    headers = Message()
    headers.set_type(ctype)
    try:
        headers['Content-Length'] = pdict['CONTENT-LENGTH']
    except KeyError:
        pass
    fs = FieldStorage(fp, headers=headers, encoding=encoding, errors=errors,
        environ={'REQUEST_METHOD': 'POST'}, separator=separator)
    return {k: fs.getlist(k) for k in fs}

def _parseparam(s):
    while s[:1] == ';':
        s = s[1:]
        end = s.find(';')
        while end > 0 and (s.count('"', 0, end) - s.count('\\"', 0, end)) % 2:
            end = s.find(';', end + 1)
        if end < 0:
            end = len(s)
        f = s[:end]
        yield f.strip()
        s = s[end:]

def parse_header(line):
    """Parse a Content-type like header.

Return the main content-type and a dictionary of options.

"""
    parts = _parseparam(';' + line)
    key = parts.__next__()
    pdict = {}
    for p in parts:
        i = p.find('=')
        if i >= 0:
            name = p[:i].strip().lower()
            value = p[i+1:].strip()
            if len(value) >= 2 and value[0] == value[-1] == '"':
                value = value[1:-1]
                value = value.replace('\\\\', '\\').replace('\\"', '"')
            pdict[name] = value
    return key, pdict

# Classes for field storage
# =========================

class MiniFieldStorage:

"""Like FieldStorage, for use when no file uploads are possible."""

# Dummy attributes
    filename = None
    list = None
    type = None
    file = None
    type_options = {}
    disposition = None
    disposition_options = {}
    headers = {}

def __init__(self, name, value):
        """Constructor from field name and value."""
        self.name = name
        self.value = value
        # self.file = StringIO(value)

def __repr__(self):
        """Return printable representation."""
        return "MiniFieldStorage(%r, %r)" % (self.name, self.value)

class FieldStorage:

"""Store a sequence of fields, reading multipart/form-data.

This class provides naming, typing, files stored on disk, and
    more.  At the top level, it is accessible like a dictionary, whose
    keys are the field names.  (Note: None can occur as a field name.)
    The items are either a Python list (if there's multiple values) or
    another FieldStorage or MiniFieldStorage object.  If it's a single
    object, it has the following attributes:

name: the field name, if specified; otherwise None

filename: the filename, if specified; otherwise None; this is the
        client side filename, *not* the file name on which it is
        stored (that's a temporary file you don't deal with)

value: the value as a *string*; for file uploads, this
        transparently reads the file every time you request the value
        and returns *bytes*

file: the file(-like) object from which you can read the data *as
        bytes* ; None if the data is stored a simple string

type: the content-type, or None if not specified

type_options: dictionary of options specified on the content-type
        line

disposition: content-disposition, or None if not specified

disposition_options: dictionary of corresponding options

headers: a dictionary(-like) object (sometimes email.message.Message or a
        subclass thereof) containing *all* headers

The class is subclassable, mostly for the purpose of overriding
    the make_file() method, which is called internally to come up with
    a file open for reading and writing.  This makes it possible to
    override the default choice of storing all files in a temporary
    directory and unlinking them as soon as they have been opened.

"""
    def __init__(self, fp=None, headers=None, outerboundary=b'',
                 environ=os.environ, keep_blank_values=0, strict_parsing=0,
                 limit=None, encoding='utf-8', errors='replace',
                 max_num_fields=None, separator='&'):
        """Constructor.  Read multipart/* until last part.

Arguments, all optional:

fp              : file pointer; default: sys.stdin.buffer
            (not used when the request method is GET)
            Can be :
            1. a TextIOWrapper object
            2. an object whose read() and readline() methods return bytes

headers         : header dictionary-like object; default:
            taken from environ as per CGI spec

outerboundary   : terminating multipart boundary
            (for internal use only)

environ         : environment dictionary; default: os.environ

strict_parsing: flag indicating what to do with parsing errors.
            If false (the default), errors are silently ignored.
            If true, errors raise a ValueError exception.

limit : used internally to read parts of multipart/form-data forms,
            to exit from the reading loop when reached. It is the difference
            between the form content-length and the number of bytes already
            read

encoding, errors : the encoding and error handler used to decode the
            binary stream to strings. Must be the same as the charset defined
            for the page sending the form (content-type : meta http-equiv or
            header)

max_num_fields: int. If set, then __init__ throws a ValueError
            if there are more than n fields read by parse_qsl().

"""
        method = 'GET'
        self.keep_blank_values = keep_blank_values
        self.strict_parsing = strict_parsing
        self.max_num_fields = max_num_fields
        self.separator = separator
        if 'REQUEST_METHOD' in environ:
            method = environ['REQUEST_METHOD'].upper()
        self.qs_on_post = None
        if method == 'GET' or method == 'HEAD':
            if 'QUERY_STRING' in environ:
                qs = environ['QUERY_STRING']
            elif sys.argv[1:]:
                qs = sys.argv[1]
            else:
                qs = ""
            qs = qs.encode(locale.getpreferredencoding(), 'surrogateescape')
            fp = BytesIO(qs)
            if headers is None:
                headers = {'content-type':
                           "application/x-www-form-urlencoded"}
        if headers is None:
            headers = {}
            if method == 'POST':
                # Set default content-type for POST to what's traditional
                headers['content-type'] = "application/x-www-form-urlencoded"
            if 'CONTENT_TYPE' in environ:
                headers['content-type'] = environ['CONTENT_TYPE']
            if 'QUERY_STRING' in environ:
                self.qs_on_post = environ['QUERY_STRING']
            if 'CONTENT_LENGTH' in environ:
                headers['content-length'] = environ['CONTENT_LENGTH']
        else:
            if not (isinstance(headers, (Mapping, Message))):
                raise TypeError("headers must be mapping or an instance of "
                                "email.message.Message")
        self.headers = headers
        if fp is None:
            self.fp = sys.stdin.buffer
        # self.fp.read() must return bytes
        elif isinstance(fp, TextIOWrapper):
            self.fp = fp.buffer
        else:
            if not (hasattr(fp, 'read') and hasattr(fp, 'readline')):
                raise TypeError("fp must be file pointer")
            self.fp = fp

self.encoding = encoding
        self.errors = errors

if not isinstance(outerboundary, bytes):
            raise TypeError('outerboundary must be bytes, not %s'
                            % type(outerboundary).__name__)
        self.outerboundary = outerboundary

self.bytes_read = 0
        self.limit = limit

# Process content-disposition header
        cdisp, pdict = "", {}
        if 'content-disposition' in self.headers:
            cdisp, pdict = parse_header(self.headers['content-disposition'])
        self.disposition = cdisp
        self.disposition_options = pdict
        self.name = None
        if 'name' in pdict:
            self.name = pdict['name']
        self.filename = None
        if 'filename' in pdict:
            self.filename = pdict['filename']
        self._binary_file = self.filename is not None

# Process content-type header
        #
        # Honor any existing content-type header.  But if there is no
        # content-type header, use some sensible defaults.  Assume
        # outerboundary is "" at the outer level, but something non-false
        # inside a multi-part.  The default for an inner part is text/plain,
        # but for an outer part it should be urlencoded.  This should catch
        # bogus clients which erroneously forget to include a content-type
        # header.
        #
        # See below for what we do if there does exist a content-type header,
        # but it happens to be something we don't understand.
        if 'content-type' in self.headers:
            ctype, pdict = parse_header(self.headers['content-type'])
        elif self.outerboundary or method != 'POST':
            ctype, pdict = "text/plain", {}
        else:
            ctype, pdict = 'application/x-www-form-urlencoded', {}
        self.type = ctype
        self.type_options = pdict
        if 'boundary' in pdict:
            self.innerboundary = pdict['boundary'].encode(self.encoding,
                                                          self.errors)
        else:
            self.innerboundary = b""

clen = -1
        if 'content-length' in self.headers:
            try:
                clen = int(self.headers['content-length'])
            except ValueError:
                pass
            if maxlen and clen > maxlen:
                raise ValueError('Maximum content length exceeded')
        self.length = clen
        if self.limit is None and clen >= 0:
            self.limit = clen

self.list = self.file = None
        self.done = 0
        if ctype == 'application/x-www-form-urlencoded':
            self.read_urlencoded()
        elif ctype[:10] == 'multipart/':
            self.read_multi(environ, keep_blank_values, strict_parsing)
        else:
            self.read_single()

def __del__(self):
        try:
            self.file.close()
        except AttributeError:
            pass

def __enter__(self):
        return self

def __exit__(self, *args):
        self.file.close()

def __repr__(self):
        """Return a printable representation."""
        return "FieldStorage(%r, %r, %r)" % (
                self.name, self.filename, self.value)

def __iter__(self):
        return iter(self.keys())

def __getattr__(self, name):
        if name != 'value':
            raise AttributeError(name)
        if self.file:
            self.file.seek(0)
            value = self.file.read()
            self.file.seek(0)
        elif self.list is not None:
            value = self.list
        else:
            value = None
        return value

def __getitem__(self, key):
        """Dictionary style indexing."""
        if self.list is None:
            raise TypeError("not indexable")
        found = []
        for item in self.list:
            if item.name == key: found.append(item)
        if not found:
            raise KeyError(key)
        if len(found) == 1:
            return found[0]
        else:
            return found

def getvalue(self, key, default=None):
        """Dictionary style get() method, including 'value' lookup."""
        if key in self:
            value = self[key]
            if isinstance(value, list):
                return [x.value for x in value]
            else:
                return value.value
        else:
            return default

def getfirst(self, key, default=None):
        """ Return the first value received."""
        if key in self:
            value = self[key]
            if isinstance(value, list):
                return value[0].value
            else:
                return value.value
        else:
            return default

def getlist(self, key):
        """ Return list of received values."""
        if key in self:
            value = self[key]
            if isinstance(value, list):
                return [x.value for x in value]
            else:
                return [value.value]
        else:
            return []

def keys(self):
        """Dictionary style keys() method."""
        if self.list is None:
            raise TypeError("not indexable")
        return list(set(item.name for item in self.list))

def __contains__(self, key):
        """Dictionary style __contains__ method."""
        if self.list is None:
            raise TypeError("not indexable")
        return any(item.name == key for item in self.list)

def __len__(self):
        """Dictionary style len(x) support."""
        return len(self.keys())

def __bool__(self):
        if self.list is None:
            raise TypeError("Cannot be converted to bool.")
        return bool(self.list)

def read_urlencoded(self):
        """Internal: read data in query string format."""
        qs = self.fp.read(self.length)
        if not isinstance(qs, bytes):
            raise ValueError("%s should return bytes, got %s" \
                             % (self.fp, type(qs).__name__))
        qs = qs.decode(self.encoding, self.errors)
        if self.qs_on_post:
            qs += '&' + self.qs_on_post
        query = urllib.parse.parse_qsl(
            qs, self.keep_blank_values, self.strict_parsing,
            encoding=self.encoding, errors=self.errors,
            max_num_fields=self.max_num_fields, separator=self.separator)
        self.list = [MiniFieldStorage(key, value) for key, value in query]
        self.skip_lines()

FieldStorageClass = None

def read_multi(self, environ, keep_blank_values, strict_parsing):
        """Internal: read a part that is itself multipart."""
        ib = self.innerboundary
        if not valid_boundary(ib):
            raise ValueError('Invalid boundary in multipart form: %r' % (ib,))
        self.list = []
        if self.qs_on_post:
            query = urllib.parse.parse_qsl(
                self.qs_on_post, self.keep_blank_values, self.strict_parsing,
                encoding=self.encoding, errors=self.errors,
                max_num_fields=self.max_num_fields, separator=self.separator)
            self.list.extend(MiniFieldStorage(key, value) for key, value in query)

klass = self.FieldStorageClass or self.__class__
        first_line = self.fp.readline() # bytes
        if not isinstance(first_line, bytes):
            raise ValueError("%s should return bytes, got %s" \
                             % (self.fp, type(first_line).__name__))
        self.bytes_read += len(first_line)

# Ensure that we consume the file until we've hit our inner boundary
        while (first_line.strip() != (b"--" + self.innerboundary) and
                first_line):
            first_line = self.fp.readline()
            self.bytes_read += len(first_line)

# Propagate max_num_fields into the sub class appropriately
        max_num_fields = self.max_num_fields
        if max_num_fields is not None:
            max_num_fields -= len(self.list)

while True:
            parser = FeedParser()
            hdr_text = b""
            while True:
                data = self.fp.readline()
                hdr_text += data
                if not data.strip():
                    break
            if not hdr_text:
                break
            # parser takes strings, not bytes
            self.bytes_read += len(hdr_text)
            parser.feed(hdr_text.decode(self.encoding, self.errors))
            headers = parser.close()

# Some clients add Content-Length for part headers, ignore them
            if 'content-length' in headers:
                del headers['content-length']

limit = None if self.limit is None \
                else self.limit - self.bytes_read
            part = klass(self.fp, headers, ib, environ, keep_blank_values,
                         strict_parsing, limit,
                         self.encoding, self.errors, max_num_fields, self.separator)

if max_num_fields is not None:
                max_num_fields -= 1
                if part.list:
                    max_num_fields -= len(part.list)
                if max_num_fields < 0:
                    raise ValueError('Max number of fields exceeded')

self.bytes_read += part.bytes_read
            self.list.append(part)
            if part.done or self.bytes_read >= self.length > 0:
                break
        self.skip_lines()

def read_single(self):
        """Internal: read an atomic part."""
        if self.length >= 0:
            self.read_binary()
            self.skip_lines()
        else:
            self.read_lines()
        self.file.seek(0)

bufsize = 8*1024            # I/O buffering size for copy to file

def read_binary(self):
        """Internal: read binary data."""
        self.file = self.make_file()
        todo = self.length
        if todo >= 0:
            while todo > 0:
                data = self.fp.read(min(todo, self.bufsize)) # bytes
                if not isinstance(data, bytes):
                    raise ValueError("%s should return bytes, got %s"
                                     % (self.fp, type(data).__name__))
                self.bytes_read += len(data)
                if not data:
                    self.done = -1
                    break
                self.file.write(data)
                todo = todo - len(data)

def read_lines(self):
        """Internal: read lines until EOF or outerboundary."""
        if self._binary_file:
            self.file = self.__file = BytesIO() # store data as bytes for files
        else:
            self.file = self.__file = StringIO() # as strings for other fields
        if self.outerboundary:
            self.read_lines_to_outerboundary()
        else:
            self.read_lines_to_eof()

def __write(self, line):
        """line is always bytes, not string"""
        if self.__file is not None:
            if self.__file.tell() + len(line) > 1000:
                self.file = self.make_file()
                data = self.__file.getvalue()
                self.file.write(data)
                self.__file = None
        if self._binary_file:
            # keep bytes
            self.file.write(line)
        else:
            # decode to string
            self.file.write(line.decode(self.encoding, self.errors))

def read_lines_to_eof(self):
        """Internal: read lines until EOF."""
        while 1:
            line = self.fp.readline(1<<16) # bytes
            self.bytes_read += len(line)
            if not line:
                self.done = -1
                break
            self.__write(line)

def read_lines_to_outerboundary(self):
        """Internal: read lines until outerboundary.
        Data is read as bytes: boundaries and line ends must be converted
        to bytes for comparisons.
        """
        next_boundary = b"--" + self.outerboundary
        last_boundary = next_boundary + b"--"
        delim = b""
        last_line_lfend = True
        _read = 0
        while 1:

if self.limit is not None and 0 <= self.limit <= _read:
                break
            line = self.fp.readline(1<<16) # bytes
            self.bytes_read += len(line)
            _read += len(line)
            if not line:
                self.done = -1
                break
            if delim == b"\r":
                line = delim + line
                delim = b""
            if line.startswith(b"--") and last_line_lfend:
                strippedline = line.rstrip()
                if strippedline == next_boundary:
                    break
                if strippedline == last_boundary:
                    self.done = 1
                    break
            odelim = delim
            if line.endswith(b"\r\n"):
                delim = b"\r\n"
                line = line[:-2]
                last_line_lfend = True
            elif line.endswith(b"\n"):
                delim = b"\n"
                line = line[:-1]
                last_line_lfend = True
            elif line.endswith(b"\r"):
                # We may interrupt \r\n sequences if they span the 2**16
                # byte boundary
                delim = b"\r"
                line = line[:-1]
                last_line_lfend = False
            else:
                delim = b""
                last_line_lfend = False
            self.__write(odelim + line)

def skip_lines(self):
        """Internal: skip lines until outer boundary if defined."""
        if not self.outerboundary or self.done:
            return
        next_boundary = b"--" + self.outerboundary
        last_boundary = next_boundary + b"--"
        last_line_lfend = True
        while True:
            line = self.fp.readline(1<<16)
            self.bytes_read += len(line)
            if not line:
                self.done = -1
                break
            if line.endswith(b"--") and last_line_lfend:
                strippedline = line.strip()
                if strippedline == next_boundary:
                    break
                if strippedline == last_boundary:
                    self.done = 1
                    break
            last_line_lfend = line.endswith(b'\n')

def make_file(self):
        """Overridable: return a readable & writable file.

The file will be used as follows:
        - data is written to it
        - seek(0)
        - data is read from it

The file is opened in binary mode for files, in text mode
        for other fields

This version opens a temporary file for reading and writing,
        and immediately deletes (unlinks) it.  The trick (on Unix!) is
        that the file can still be used, but it can't be opened by
        another process, and it will automatically be deleted when it
        is closed or when the current process terminates.

If you want a more permanent file, you derive a class which
        overrides this method.  If you want a visible temporary file
        that is nevertheless automatically deleted when the script
        terminates, try defining a __del__ method in a derived class
        which unlinks the temporary files you have created.

"""
        if self._binary_file:
            return tempfile.TemporaryFile("wb+")
        else:
            return tempfile.TemporaryFile("w+",
                encoding=self.encoding, newline = '\n')

# Test/debug code
# ===============

def test(environ=os.environ):
    """Robust test CGI script, usable as main program.

Write minimal HTTP headers and dump all information provided to
    the script in HTML form.

"""
    print("Content-type: text/html")
    print()
    sys.stderr = sys.stdout
    try:
        form = FieldStorage()   # Replace with other classes to test those
        print_directory()
        print_arguments()
        print_form(form)
        print_environ(environ)
        print_environ_usage()
        def f():
            exec("testing print_exception() -- <I>italics?</I>")
        def g(f=f):
            f()
        print("<H3>What follows is a test, not an actual exception:</H3>")
        g()
    except:
        print_exception()

print("<H1>Second try with a small maxlen...</H1>")

global maxlen
    maxlen = 50
    try:
        form = FieldStorage()   # Replace with other classes to test those
        print_directory()
        print_arguments()
        print_form(form)
        print_environ(environ)
    except:
        print_exception()

def print_exception(type=None, value=None, tb=None, limit=None):
    if type is None:
        type, value, tb = sys.exc_info()
    import traceback
    print()
    print("<H3>Traceback (most recent call last):</H3>")
    list = traceback.format_tb(tb, limit) + \
           traceback.format_exception_only(type, value)
    print("<PRE>%s<B>%s</B></PRE>" % (
        html.escape("".join(list[:-1])),
        html.escape(list[-1]),
        ))
    del tb

def print_environ(environ=os.environ):
    """Dump the shell environment as HTML."""
    keys = sorted(environ.keys())
    print()
    print("<H3>Shell Environment:</H3>")
    print("<DL>")
    for key in keys:
        print("<DT>", html.escape(key), "<DD>", html.escape(environ[key]))
    print("</DL>")
    print()

def print_form(form):
    """Dump the contents of a form as HTML."""
    keys = sorted(form.keys())
    print()
    print("<H3>Form Contents:</H3>")
    if not keys:
        print("<P>No form fields.")
    print("<DL>")
    for key in keys:
        print("<DT>" + html.escape(key) + ":", end=' ')
        value = form[key]
        print("<i>" + html.escape(repr(type(value))) + "</i>")
        print("<DD>" + html.escape(repr(value)))
    print("</DL>")
    print()

def print_directory():
    """Dump the current directory as HTML."""
    print()
    print("<H3>Current Working Directory:</H3>")
    try:
        pwd = os.getcwd()
    except OSError as msg:
        print("OSError:", html.escape(str(msg)))
    else:
        print(html.escape(pwd))
    print()

def print_arguments():
    print()
    print("<H3>Command Line Arguments:</H3>")
    print()
    print(sys.argv)
    print()

def print_environ_usage():
    """Dump a list of environment variables used by CGI as HTML."""
    print("""
<H3>These environment variables could have been set:</H3>
<UL>
<LI>AUTH_TYPE
<LI>CONTENT_LENGTH
<LI>CONTENT_TYPE
<LI>DATE_GMT
<LI>DATE_LOCAL
<LI>DOCUMENT_NAME
<LI>DOCUMENT_ROOT
<LI>DOCUMENT_URI
<LI>GATEWAY_INTERFACE
<LI>LAST_MODIFIED
<LI>PATH
<LI>PATH_INFO
<LI>PATH_TRANSLATED
<LI>QUERY_STRING
<LI>REMOTE_ADDR
<LI>REMOTE_HOST
<LI>REMOTE_IDENT
<LI>REMOTE_USER
<LI>REQUEST_METHOD
<LI>SCRIPT_NAME
<LI>SERVER_NAME
<LI>SERVER_PORT
<LI>SERVER_PROTOCOL
<LI>SERVER_ROOT
<LI>SERVER_SOFTWARE
</UL>
In addition, HTTP headers sent by the server may be passed in the
environment as well.  Here are some common variable names:
<UL>
<LI>HTTP_ACCEPT
<LI>HTTP_CONNECTION
<LI>HTTP_HOST
<LI>HTTP_PRAGMA
<LI>HTTP_REFERER
<LI>HTTP_USER_AGENT
</UL>
""")

# Utilities
# =========

def valid_boundary(s):
    import re
    if isinstance(s, bytes):
        _vb_pattern = b"^[ -~]{0,200}[!-~]$"
    else:
        _vb_pattern = "^[ -~]{0,200}[!-~]$"
    return re.match(_vb_pattern, s)

# Invoke mainline
# ===============

# Call test() when this file is run as a script (not imported as a module)
if __name__ == '__main__':
    test()

cmd: