mirror of
https://github.com/python/cpython.git
synced 2024-12-04 07:15:09 +08:00
c1f779cb01
svn+ssh://pythondev@svn.python.org/python/branches/p3yk
........
r56127 | georg.brandl | 2007-06-30 09:32:49 +0200 (Sat, 30 Jun 2007) | 2 lines
Fix a place where floor division would be in order.
........
r56135 | guido.van.rossum | 2007-07-01 06:13:54 +0200 (Sun, 01 Jul 2007) | 28 lines
Make map() and filter() identical to itertools.imap() and .ifilter(),
respectively.
I fixed two bootstrap issues, due to the dynamic import of itertools:
1. Starting python requires that map() and filter() are not used until
site.py has added build/lib.<arch> to sys.path.
2. Building python requires that setup.py and distutils and everything
they use is free of map() and filter() calls.
Beyond this, I only fixed the tests in test_builtin.py.
Others, please help fixing the remaining tests that are now broken!
The fixes are usually simple:
a. map(None, X) -> list(X)
b. map(F, X) -> list(map(F, X))
c. map(lambda x: F(x), X) -> [F(x) for x in X]
d. filter(F, X) -> list(filter(F, X))
e. filter(lambda x: P(x), X) -> [x for x in X if P(x)]
Someone, please also contribute a fixer for 2to3 to do this.
It can leave map()/filter() calls alone that are already
inside a list() or sorted() call or for-loop.
Only in rare cases have I seen code that depends on map() of lists
of different lengths going to the end of the longest, or on filter()
of a string or tuple returning an object of the same type; these
will need more thought to fix.
........
r56136 | guido.van.rossum | 2007-07-01 06:22:01 +0200 (Sun, 01 Jul 2007) | 3 lines
Make it so that test_decimal fails instead of hangs, to help automated
test runners.
........
r56139 | georg.brandl | 2007-07-01 18:20:58 +0200 (Sun, 01 Jul 2007) | 2 lines
Fix a few test cases after the map->imap change.
........
r56142 | neal.norwitz | 2007-07-02 06:38:12 +0200 (Mon, 02 Jul 2007) | 1 line
Get a bunch more tests passing after converting map/filter to return iterators.
........
r56147 | guido.van.rossum | 2007-07-02 15:32:02 +0200 (Mon, 02 Jul 2007) | 4 lines
Fix the remaining failing unit tests (at least on OSX).
Also tweaked urllib2 so it doesn't raise socket.gaierror when
all network interfaces are turned off.
........
1063 lines
34 KiB
Python
Executable File
1063 lines
34 KiB
Python
Executable File
#! /usr/local/bin/python
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# NOTE: the above "/usr/local/bin/python" is NOT a mistake. It is
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# intentionally NOT "/usr/bin/env python". On many systems
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# (e.g. Solaris), /usr/local/bin is not in $PATH as passed to CGI
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# scripts, and /usr/local/bin is the default directory where Python is
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# installed, so /usr/bin/env would be unable to find python. Granted,
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# binary installations by Linux vendors often install Python in
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# /usr/bin. So let those vendors patch cgi.py to match their choice
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# of installation.
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"""Support module for CGI (Common Gateway Interface) scripts.
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This module defines a number of utilities for use by CGI scripts
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written in Python.
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"""
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# XXX Perhaps there should be a slimmed version that doesn't contain
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# all those backwards compatible and debugging classes and functions?
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# History
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# -------
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#
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# Michael McLay started this module. Steve Majewski changed the
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# interface to SvFormContentDict and FormContentDict. The multipart
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# parsing was inspired by code submitted by Andreas Paepcke. Guido van
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# Rossum rewrote, reformatted and documented the module and is currently
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# responsible for its maintenance.
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#
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__version__ = "2.6"
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# Imports
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# =======
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from operator import attrgetter
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import sys
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import os
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import urllib
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import mimetools
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import rfc822
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import UserDict
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from io import StringIO
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__all__ = ["MiniFieldStorage", "FieldStorage", "FormContentDict",
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"SvFormContentDict", "InterpFormContentDict", "FormContent",
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"parse", "parse_qs", "parse_qsl", "parse_multipart",
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"parse_header", "print_exception", "print_environ",
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"print_form", "print_directory", "print_arguments",
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"print_environ_usage", "escape"]
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# Logging support
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# ===============
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logfile = "" # Filename to log to, if not empty
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logfp = None # File object to log to, if not None
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def initlog(*allargs):
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"""Write a log message, if there is a log file.
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Even though this function is called initlog(), you should always
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use log(); log is a variable that is set either to initlog
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(initially), to dolog (once the log file has been opened), or to
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nolog (when logging is disabled).
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The first argument is a format string; the remaining arguments (if
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any) are arguments to the % operator, so e.g.
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log("%s: %s", "a", "b")
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will write "a: b" to the log file, followed by a newline.
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If the global logfp is not None, it should be a file object to
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which log data is written.
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If the global logfp is None, the global logfile may be a string
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giving a filename to open, in append mode. This file should be
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world writable!!! If the file can't be opened, logging is
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silently disabled (since there is no safe place where we could
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send an error message).
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"""
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global logfp, log
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if logfile and not logfp:
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try:
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logfp = open(logfile, "a")
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except IOError:
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pass
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if not logfp:
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log = nolog
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else:
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log = dolog
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log(*allargs)
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def dolog(fmt, *args):
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"""Write a log message to the log file. See initlog() for docs."""
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logfp.write(fmt%args + "\n")
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def nolog(*allargs):
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"""Dummy function, assigned to log when logging is disabled."""
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pass
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log = initlog # The current logging function
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# Parsing functions
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# =================
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# Maximum input we will accept when REQUEST_METHOD is POST
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# 0 ==> unlimited input
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maxlen = 0
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def parse(fp=None, environ=os.environ, keep_blank_values=0, strict_parsing=0):
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"""Parse a query in the environment or from a file (default stdin)
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Arguments, all optional:
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fp : file pointer; default: sys.stdin
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environ : environment dictionary; default: os.environ
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keep_blank_values: flag indicating whether blank values in
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URL encoded forms should be treated as blank strings.
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A true value indicates that blanks should be retained as
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blank strings. The default false value indicates that
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blank values are to be ignored and treated as if they were
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not included.
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strict_parsing: flag indicating what to do with parsing errors.
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If false (the default), errors are silently ignored.
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If true, errors raise a ValueError exception.
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"""
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if fp is None:
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fp = sys.stdin
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if not 'REQUEST_METHOD' in environ:
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environ['REQUEST_METHOD'] = 'GET' # For testing stand-alone
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if environ['REQUEST_METHOD'] == 'POST':
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ctype, pdict = parse_header(environ['CONTENT_TYPE'])
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if ctype == 'multipart/form-data':
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return parse_multipart(fp, pdict)
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elif ctype == 'application/x-www-form-urlencoded':
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clength = int(environ['CONTENT_LENGTH'])
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if maxlen and clength > maxlen:
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raise ValueError, 'Maximum content length exceeded'
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qs = fp.read(clength)
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else:
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qs = '' # Unknown content-type
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if 'QUERY_STRING' in environ:
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if qs: qs = qs + '&'
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qs = qs + environ['QUERY_STRING']
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elif sys.argv[1:]:
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if qs: qs = qs + '&'
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qs = qs + sys.argv[1]
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environ['QUERY_STRING'] = qs # XXX Shouldn't, really
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elif 'QUERY_STRING' in environ:
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qs = environ['QUERY_STRING']
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else:
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if sys.argv[1:]:
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qs = sys.argv[1]
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else:
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qs = ""
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environ['QUERY_STRING'] = qs # XXX Shouldn't, really
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return parse_qs(qs, keep_blank_values, strict_parsing)
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def parse_qs(qs, keep_blank_values=0, strict_parsing=0):
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"""Parse a query given as a string argument.
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Arguments:
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qs: URL-encoded query string to be parsed
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keep_blank_values: flag indicating whether blank values in
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URL encoded queries should be treated as blank strings.
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A true value indicates that blanks should be retained as
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blank strings. The default false value indicates that
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blank values are to be ignored and treated as if they were
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not included.
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strict_parsing: flag indicating what to do with parsing errors.
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If false (the default), errors are silently ignored.
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If true, errors raise a ValueError exception.
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"""
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dict = {}
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for name, value in parse_qsl(qs, keep_blank_values, strict_parsing):
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if name in dict:
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dict[name].append(value)
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else:
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dict[name] = [value]
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return dict
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def parse_qsl(qs, keep_blank_values=0, strict_parsing=0):
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"""Parse a query given as a string argument.
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Arguments:
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qs: URL-encoded query string to be parsed
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keep_blank_values: flag indicating whether blank values in
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URL encoded queries should be treated as blank strings. A
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true value indicates that blanks should be retained as blank
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strings. The default false value indicates that blank values
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are to be ignored and treated as if they were not included.
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strict_parsing: flag indicating what to do with parsing errors. If
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false (the default), errors are silently ignored. If true,
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errors raise a ValueError exception.
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Returns a list, as G-d intended.
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"""
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pairs = [s2 for s1 in qs.split('&') for s2 in s1.split(';')]
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r = []
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for name_value in pairs:
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if not name_value and not strict_parsing:
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continue
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nv = name_value.split('=', 1)
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if len(nv) != 2:
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if strict_parsing:
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raise ValueError, "bad query field: %r" % (name_value,)
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# Handle case of a control-name with no equal sign
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if keep_blank_values:
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nv.append('')
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else:
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continue
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if len(nv[1]) or keep_blank_values:
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name = urllib.unquote(nv[0].replace('+', ' '))
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value = urllib.unquote(nv[1].replace('+', ' '))
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r.append((name, value))
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return r
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def parse_multipart(fp, pdict):
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"""Parse multipart input.
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Arguments:
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fp : input file
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pdict: dictionary containing other parameters of content-type header
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Returns a dictionary just like parse_qs(): keys are the field names, each
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value is a list of values for that field. This is easy to use but not
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much good if you are expecting megabytes to be uploaded -- in that case,
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use the FieldStorage class instead which is much more flexible. Note
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that content-type is the raw, unparsed contents of the content-type
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header.
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XXX This does not parse nested multipart parts -- use FieldStorage for
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that.
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XXX This should really be subsumed by FieldStorage altogether -- no
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point in having two implementations of the same parsing algorithm.
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Also, FieldStorage protects itself better against certain DoS attacks
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by limiting the size of the data read in one chunk. The API here
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does not support that kind of protection. This also affects parse()
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since it can call parse_multipart().
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"""
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boundary = ""
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if 'boundary' in pdict:
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boundary = pdict['boundary']
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if not valid_boundary(boundary):
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raise ValueError, ('Invalid boundary in multipart form: %r'
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% (boundary,))
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nextpart = "--" + boundary
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lastpart = "--" + boundary + "--"
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partdict = {}
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terminator = ""
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while terminator != lastpart:
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bytes = -1
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data = None
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if terminator:
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# At start of next part. Read headers first.
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headers = mimetools.Message(fp)
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clength = headers.getheader('content-length')
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if clength:
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try:
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bytes = int(clength)
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except ValueError:
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pass
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if bytes > 0:
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if maxlen and bytes > maxlen:
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raise ValueError, 'Maximum content length exceeded'
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data = fp.read(bytes)
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else:
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data = ""
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# Read lines until end of part.
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lines = []
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while 1:
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line = fp.readline()
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if not line:
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terminator = lastpart # End outer loop
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break
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if line[:2] == "--":
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terminator = line.strip()
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if terminator in (nextpart, lastpart):
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break
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lines.append(line)
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# Done with part.
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if data is None:
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continue
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if bytes < 0:
|
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if lines:
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# Strip final line terminator
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line = lines[-1]
|
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if line[-2:] == "\r\n":
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line = line[:-2]
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elif line[-1:] == "\n":
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line = line[:-1]
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lines[-1] = line
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data = "".join(lines)
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line = headers['content-disposition']
|
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if not line:
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continue
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key, params = parse_header(line)
|
|
if key != 'form-data':
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continue
|
|
if 'name' in params:
|
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name = params['name']
|
|
else:
|
|
continue
|
|
if name in partdict:
|
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partdict[name].append(data)
|
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else:
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partdict[name] = [data]
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return partdict
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|
|
|
|
def parse_header(line):
|
|
"""Parse a Content-type like header.
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|
Return the main content-type and a dictionary of options.
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"""
|
|
plist = [x.strip() for x in line.split(';')]
|
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key = plist.pop(0).lower()
|
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pdict = {}
|
|
for p in plist:
|
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i = p.find('=')
|
|
if i >= 0:
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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('\\"', '"')
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pdict[name] = value
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return key, pdict
|
|
|
|
|
|
# Classes for field storage
|
|
# =========================
|
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|
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class MiniFieldStorage:
|
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|
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"""Like FieldStorage, for use when no file uploads are possible."""
|
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|
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# Dummy attributes
|
|
filename = None
|
|
list = None
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type = None
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file = None
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type_options = {}
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disposition = None
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disposition_options = {}
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headers = {}
|
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|
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def __init__(self, name, value):
|
|
"""Constructor from field name and value."""
|
|
self.name = name
|
|
self.value = value
|
|
# self.file = StringIO(value)
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|
|
|
def __repr__(self):
|
|
"""Return printable representation."""
|
|
return "MiniFieldStorage(%r, %r)" % (self.name, self.value)
|
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|
|
|
|
class FieldStorage:
|
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|
|
"""Store a sequence of fields, reading multipart/form-data.
|
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|
|
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
|
|
|
|
file: the file(-like) object from which you can read the data;
|
|
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 rfc822.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="",
|
|
environ=os.environ, keep_blank_values=0, strict_parsing=0):
|
|
"""Constructor. Read multipart/* until last part.
|
|
|
|
Arguments, all optional:
|
|
|
|
fp : file pointer; default: sys.stdin
|
|
(not used when the request method is GET)
|
|
|
|
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
|
|
|
|
keep_blank_values: flag indicating whether blank values in
|
|
URL 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.
|
|
|
|
"""
|
|
method = 'GET'
|
|
self.keep_blank_values = keep_blank_values
|
|
self.strict_parsing = strict_parsing
|
|
if 'REQUEST_METHOD' in environ:
|
|
method = environ['REQUEST_METHOD'].upper()
|
|
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 = ""
|
|
fp = StringIO(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 'CONTENT_LENGTH' in environ:
|
|
headers['content-length'] = environ['CONTENT_LENGTH']
|
|
self.fp = fp or sys.stdin
|
|
self.headers = headers
|
|
self.outerboundary = outerboundary
|
|
|
|
# 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']
|
|
|
|
# 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
|
|
self.innerboundary = ""
|
|
if 'boundary' in pdict:
|
|
self.innerboundary = pdict['boundary']
|
|
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
|
|
|
|
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 __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 type(value) is type([]):
|
|
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 type(value) is type([]):
|
|
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 type(value) is type([]):
|
|
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"
|
|
keys = []
|
|
for item in self.list:
|
|
if item.name not in keys: keys.append(item.name)
|
|
return keys
|
|
|
|
def __contains__(self, key):
|
|
"""Dictionary style __contains__ method."""
|
|
if self.list is None:
|
|
raise TypeError, "not indexable"
|
|
for item in self.list:
|
|
if item.name == key: return True
|
|
return False
|
|
|
|
def __len__(self):
|
|
"""Dictionary style len(x) support."""
|
|
return len(self.keys())
|
|
|
|
def read_urlencoded(self):
|
|
"""Internal: read data in query string format."""
|
|
qs = self.fp.read(self.length)
|
|
self.list = list = []
|
|
for key, value in parse_qsl(qs, self.keep_blank_values,
|
|
self.strict_parsing):
|
|
list.append(MiniFieldStorage(key, value))
|
|
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 = []
|
|
klass = self.FieldStorageClass or self.__class__
|
|
part = klass(self.fp, {}, ib,
|
|
environ, keep_blank_values, strict_parsing)
|
|
# Throw first part away
|
|
while not part.done:
|
|
headers = rfc822.Message(self.fp)
|
|
part = klass(self.fp, headers, ib,
|
|
environ, keep_blank_values, strict_parsing)
|
|
self.list.append(part)
|
|
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('b')
|
|
todo = self.length
|
|
if todo >= 0:
|
|
while todo > 0:
|
|
data = self.fp.read(min(todo, self.bufsize))
|
|
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."""
|
|
self.file = self.__file = StringIO()
|
|
if self.outerboundary:
|
|
self.read_lines_to_outerboundary()
|
|
else:
|
|
self.read_lines_to_eof()
|
|
|
|
def __write(self, line):
|
|
if self.__file is not None:
|
|
if self.__file.tell() + len(line) > 1000:
|
|
self.file = self.make_file('')
|
|
self.file.write(self.__file.getvalue())
|
|
self.__file = None
|
|
self.file.write(line)
|
|
|
|
def read_lines_to_eof(self):
|
|
"""Internal: read lines until EOF."""
|
|
while 1:
|
|
line = self.fp.readline(1<<16)
|
|
if not line:
|
|
self.done = -1
|
|
break
|
|
self.__write(line)
|
|
|
|
def read_lines_to_outerboundary(self):
|
|
"""Internal: read lines until outerboundary."""
|
|
next = "--" + self.outerboundary
|
|
last = next + "--"
|
|
delim = ""
|
|
last_line_lfend = True
|
|
while 1:
|
|
line = self.fp.readline(1<<16)
|
|
if not line:
|
|
self.done = -1
|
|
break
|
|
if line[:2] == "--" and last_line_lfend:
|
|
strippedline = line.strip()
|
|
if strippedline == next:
|
|
break
|
|
if strippedline == last:
|
|
self.done = 1
|
|
break
|
|
odelim = delim
|
|
if line[-2:] == "\r\n":
|
|
delim = "\r\n"
|
|
line = line[:-2]
|
|
last_line_lfend = True
|
|
elif line[-1] == "\n":
|
|
delim = "\n"
|
|
line = line[:-1]
|
|
last_line_lfend = True
|
|
else:
|
|
delim = ""
|
|
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 = "--" + self.outerboundary
|
|
last = next + "--"
|
|
last_line_lfend = True
|
|
while 1:
|
|
line = self.fp.readline(1<<16)
|
|
if not line:
|
|
self.done = -1
|
|
break
|
|
if line[:2] == "--" and last_line_lfend:
|
|
strippedline = line.strip()
|
|
if strippedline == next:
|
|
break
|
|
if strippedline == last:
|
|
self.done = 1
|
|
break
|
|
last_line_lfend = line.endswith('\n')
|
|
|
|
def make_file(self, binary=None):
|
|
"""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 'binary' argument is unused -- the file is always opened
|
|
in binary mode.
|
|
|
|
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.
|
|
|
|
"""
|
|
import tempfile
|
|
return tempfile.TemporaryFile("w+b")
|
|
|
|
|
|
|
|
# Backwards Compatibility Classes
|
|
# ===============================
|
|
|
|
class FormContentDict(UserDict.UserDict):
|
|
"""Form content as dictionary with a list of values per field.
|
|
|
|
form = FormContentDict()
|
|
|
|
form[key] -> [value, value, ...]
|
|
key in form -> Boolean
|
|
form.keys() -> [key, key, ...]
|
|
form.values() -> [[val, val, ...], [val, val, ...], ...]
|
|
form.items() -> [(key, [val, val, ...]), (key, [val, val, ...]), ...]
|
|
form.dict == {key: [val, val, ...], ...}
|
|
|
|
"""
|
|
def __init__(self, environ=os.environ, keep_blank_values=0, strict_parsing=0):
|
|
self.dict = self.data = parse(environ=environ,
|
|
keep_blank_values=keep_blank_values,
|
|
strict_parsing=strict_parsing)
|
|
self.query_string = environ['QUERY_STRING']
|
|
|
|
|
|
class SvFormContentDict(FormContentDict):
|
|
"""Form content as dictionary expecting a single value per field.
|
|
|
|
If you only expect a single value for each field, then form[key]
|
|
will return that single value. It will raise an IndexError if
|
|
that expectation is not true. If you expect a field to have
|
|
possible multiple values, than you can use form.getlist(key) to
|
|
get all of the values. values() and items() are a compromise:
|
|
they return single strings where there is a single value, and
|
|
lists of strings otherwise.
|
|
|
|
"""
|
|
def __getitem__(self, key):
|
|
if len(self.dict[key]) > 1:
|
|
raise IndexError, 'expecting a single value'
|
|
return self.dict[key][0]
|
|
def getlist(self, key):
|
|
return self.dict[key]
|
|
def values(self):
|
|
result = []
|
|
for value in self.dict.values():
|
|
if len(value) == 1:
|
|
result.append(value[0])
|
|
else: result.append(value)
|
|
return result
|
|
def items(self):
|
|
result = []
|
|
for key, value in self.dict.items():
|
|
if len(value) == 1:
|
|
result.append((key, value[0]))
|
|
else: result.append((key, value))
|
|
return result
|
|
|
|
|
|
class InterpFormContentDict(SvFormContentDict):
|
|
"""This class is present for backwards compatibility only."""
|
|
def __getitem__(self, key):
|
|
v = SvFormContentDict.__getitem__(self, key)
|
|
if v[0] in '0123456789+-.':
|
|
try: return int(v)
|
|
except ValueError:
|
|
try: return float(v)
|
|
except ValueError: pass
|
|
return v.strip()
|
|
def values(self):
|
|
result = []
|
|
for key in self.keys():
|
|
try:
|
|
result.append(self[key])
|
|
except IndexError:
|
|
result.append(self.dict[key])
|
|
return result
|
|
def items(self):
|
|
result = []
|
|
for key in self.keys():
|
|
try:
|
|
result.append((key, self[key]))
|
|
except IndexError:
|
|
result.append((key, self.dict[key]))
|
|
return result
|
|
|
|
|
|
class FormContent(FormContentDict):
|
|
"""This class is present for backwards compatibility only."""
|
|
def values(self, key):
|
|
if key in self.dict :return self.dict[key]
|
|
else: return None
|
|
def indexed_value(self, key, location):
|
|
if key in self.dict:
|
|
if len(self.dict[key]) > location:
|
|
return self.dict[key][location]
|
|
else: return None
|
|
else: return None
|
|
def value(self, key):
|
|
if key in self.dict: return self.dict[key][0]
|
|
else: return None
|
|
def length(self, key):
|
|
return len(self.dict[key])
|
|
def stripped(self, key):
|
|
if key in self.dict: return self.dict[key][0].strip()
|
|
else: return None
|
|
def pars(self):
|
|
return self.dict
|
|
|
|
|
|
# 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>" % (
|
|
escape("".join(list[:-1])),
|
|
escape(list[-1]),
|
|
))
|
|
del tb
|
|
|
|
def print_environ(environ=os.environ):
|
|
"""Dump the shell environment as HTML."""
|
|
keys = environ.keys()
|
|
keys.sort()
|
|
print()
|
|
print("<H3>Shell Environment:</H3>")
|
|
print("<DL>")
|
|
for key in keys:
|
|
print("<DT>", escape(key), "<DD>", escape(environ[key]))
|
|
print("</DL>")
|
|
print()
|
|
|
|
def print_form(form):
|
|
"""Dump the contents of a form as HTML."""
|
|
keys = form.keys()
|
|
keys.sort()
|
|
print()
|
|
print("<H3>Form Contents:</H3>")
|
|
if not keys:
|
|
print("<P>No form fields.")
|
|
print("<DL>")
|
|
for key in keys:
|
|
print("<DT>" + escape(key) + ":", end=' ')
|
|
value = form[key]
|
|
print("<i>" + escape(repr(type(value))) + "</i>")
|
|
print("<DD>" + 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 os.error as msg:
|
|
print("os.error:", escape(str(msg)))
|
|
else:
|
|
print(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 escape(s, quote=None):
|
|
'''Replace special characters "&", "<" and ">" to HTML-safe sequences.
|
|
If the optional flag quote is true, the quotation mark character (")
|
|
is also translated.'''
|
|
s = s.replace("&", "&") # Must be done first!
|
|
s = s.replace("<", "<")
|
|
s = s.replace(">", ">")
|
|
if quote:
|
|
s = s.replace('"', """)
|
|
return s
|
|
|
|
def valid_boundary(s, _vb_pattern="^[ -~]{0,200}[!-~]$"):
|
|
import re
|
|
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()
|