640 lines
22 KiB
Python
640 lines
22 KiB
Python
import cgi
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import os
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import sys
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import tempfile
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import unittest
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from collections import namedtuple
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from io import StringIO, BytesIO
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from test import support
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from test.support import warnings_helper
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class HackedSysModule:
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# The regression test will have real values in sys.argv, which
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# will completely confuse the test of the cgi module
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argv = []
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stdin = sys.stdin
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cgi.sys = HackedSysModule()
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class ComparableException:
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def __init__(self, err):
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self.err = err
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def __str__(self):
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return str(self.err)
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def __eq__(self, anExc):
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if not isinstance(anExc, Exception):
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return NotImplemented
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return (self.err.__class__ == anExc.__class__ and
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self.err.args == anExc.args)
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def __getattr__(self, attr):
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return getattr(self.err, attr)
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def do_test(buf, method):
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env = {}
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if method == "GET":
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fp = None
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env['REQUEST_METHOD'] = 'GET'
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env['QUERY_STRING'] = buf
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elif method == "POST":
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fp = BytesIO(buf.encode('latin-1')) # FieldStorage expects bytes
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env['REQUEST_METHOD'] = 'POST'
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env['CONTENT_TYPE'] = 'application/x-www-form-urlencoded'
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env['CONTENT_LENGTH'] = str(len(buf))
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else:
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raise ValueError("unknown method: %s" % method)
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try:
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return cgi.parse(fp, env, strict_parsing=1)
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except Exception as err:
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return ComparableException(err)
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parse_strict_test_cases = [
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("", ValueError("bad query field: ''")),
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("&", ValueError("bad query field: ''")),
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("&&", ValueError("bad query field: ''")),
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# Should the next few really be valid?
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("=", {}),
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("=&=", {}),
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# This rest seem to make sense
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("=a", {'': ['a']}),
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("&=a", ValueError("bad query field: ''")),
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("=a&", ValueError("bad query field: ''")),
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("=&a", ValueError("bad query field: 'a'")),
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("b=a", {'b': ['a']}),
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("b+=a", {'b ': ['a']}),
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("a=b=a", {'a': ['b=a']}),
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("a=+b=a", {'a': [' b=a']}),
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("&b=a", ValueError("bad query field: ''")),
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("b&=a", ValueError("bad query field: 'b'")),
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("a=a+b&b=b+c", {'a': ['a b'], 'b': ['b c']}),
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("a=a+b&a=b+a", {'a': ['a b', 'b a']}),
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("x=1&y=2.0&z=2-3.%2b0", {'x': ['1'], 'y': ['2.0'], 'z': ['2-3.+0']}),
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("Hbc5161168c542333633315dee1182227:key_store_seqid=400006&cuyer=r&view=bustomer&order_id=0bb2e248638833d48cb7fed300000f1b&expire=964546263&lobale=en-US&kid=130003.300038&ss=env",
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{'Hbc5161168c542333633315dee1182227:key_store_seqid': ['400006'],
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'cuyer': ['r'],
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'expire': ['964546263'],
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'kid': ['130003.300038'],
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'lobale': ['en-US'],
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'order_id': ['0bb2e248638833d48cb7fed300000f1b'],
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'ss': ['env'],
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'view': ['bustomer'],
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}),
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("group_id=5470&set=custom&_assigned_to=31392&_status=1&_category=100&SUBMIT=Browse",
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{'SUBMIT': ['Browse'],
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'_assigned_to': ['31392'],
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'_category': ['100'],
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'_status': ['1'],
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'group_id': ['5470'],
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'set': ['custom'],
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})
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]
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def norm(seq):
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return sorted(seq, key=repr)
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def first_elts(list):
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return [p[0] for p in list]
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def first_second_elts(list):
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return [(p[0], p[1][0]) for p in list]
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def gen_result(data, environ):
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encoding = 'latin-1'
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fake_stdin = BytesIO(data.encode(encoding))
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fake_stdin.seek(0)
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form = cgi.FieldStorage(fp=fake_stdin, environ=environ, encoding=encoding)
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result = {}
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for k, v in dict(form).items():
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result[k] = isinstance(v, list) and form.getlist(k) or v.value
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return result
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class CgiTests(unittest.TestCase):
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def test_parse_multipart(self):
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fp = BytesIO(POSTDATA.encode('latin1'))
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env = {'boundary': BOUNDARY.encode('latin1'),
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'CONTENT-LENGTH': '558'}
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result = cgi.parse_multipart(fp, env)
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expected = {'submit': [' Add '], 'id': ['1234'],
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'file': [b'Testing 123.\n'], 'title': ['']}
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self.assertEqual(result, expected)
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def test_parse_multipart_without_content_length(self):
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POSTDATA = '''--JfISa01
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Content-Disposition: form-data; name="submit-name"
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just a string
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--JfISa01--
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'''
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fp = BytesIO(POSTDATA.encode('latin1'))
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env = {'boundary': 'JfISa01'.encode('latin1')}
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result = cgi.parse_multipart(fp, env)
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expected = {'submit-name': ['just a string\n']}
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self.assertEqual(result, expected)
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def test_parse_multipart_invalid_encoding(self):
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BOUNDARY = "JfISa01"
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POSTDATA = """--JfISa01
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Content-Disposition: form-data; name="submit-name"
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Content-Length: 3
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\u2603
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--JfISa01"""
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fp = BytesIO(POSTDATA.encode('utf8'))
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env = {'boundary': BOUNDARY.encode('latin1'),
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'CONTENT-LENGTH': str(len(POSTDATA.encode('utf8')))}
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result = cgi.parse_multipart(fp, env, encoding="ascii",
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errors="surrogateescape")
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expected = {'submit-name': ["\udce2\udc98\udc83"]}
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self.assertEqual(result, expected)
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self.assertEqual("\u2603".encode('utf8'),
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result["submit-name"][0].encode('utf8', 'surrogateescape'))
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def test_fieldstorage_properties(self):
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fs = cgi.FieldStorage()
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self.assertFalse(fs)
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self.assertIn("FieldStorage", repr(fs))
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self.assertEqual(list(fs), list(fs.keys()))
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fs.list.append(namedtuple('MockFieldStorage', 'name')('fieldvalue'))
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self.assertTrue(fs)
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def test_fieldstorage_invalid(self):
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self.assertRaises(TypeError, cgi.FieldStorage, "not-a-file-obj",
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environ={"REQUEST_METHOD":"PUT"})
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self.assertRaises(TypeError, cgi.FieldStorage, "foo", "bar")
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fs = cgi.FieldStorage(headers={'content-type':'text/plain'})
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self.assertRaises(TypeError, bool, fs)
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def test_strict(self):
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for orig, expect in parse_strict_test_cases:
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# Test basic parsing
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d = do_test(orig, "GET")
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self.assertEqual(d, expect, "Error parsing %s method GET" % repr(orig))
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d = do_test(orig, "POST")
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self.assertEqual(d, expect, "Error parsing %s method POST" % repr(orig))
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env = {'QUERY_STRING': orig}
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fs = cgi.FieldStorage(environ=env)
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if isinstance(expect, dict):
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# test dict interface
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self.assertEqual(len(expect), len(fs))
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self.assertCountEqual(expect.keys(), fs.keys())
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##self.assertEqual(norm(expect.values()), norm(fs.values()))
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##self.assertEqual(norm(expect.items()), norm(fs.items()))
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self.assertEqual(fs.getvalue("nonexistent field", "default"), "default")
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# test individual fields
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for key in expect.keys():
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expect_val = expect[key]
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self.assertIn(key, fs)
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if len(expect_val) > 1:
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self.assertEqual(fs.getvalue(key), expect_val)
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else:
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self.assertEqual(fs.getvalue(key), expect_val[0])
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def test_separator(self):
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parse_semicolon = [
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("x=1;y=2.0", {'x': ['1'], 'y': ['2.0']}),
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("x=1;y=2.0;z=2-3.%2b0", {'x': ['1'], 'y': ['2.0'], 'z': ['2-3.+0']}),
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(";", ValueError("bad query field: ''")),
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(";;", ValueError("bad query field: ''")),
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("=;a", ValueError("bad query field: 'a'")),
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(";b=a", ValueError("bad query field: ''")),
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("b;=a", ValueError("bad query field: 'b'")),
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("a=a+b;b=b+c", {'a': ['a b'], 'b': ['b c']}),
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("a=a+b;a=b+a", {'a': ['a b', 'b a']}),
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]
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for orig, expect in parse_semicolon:
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env = {'QUERY_STRING': orig}
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fs = cgi.FieldStorage(separator=';', environ=env)
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if isinstance(expect, dict):
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for key in expect.keys():
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expect_val = expect[key]
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self.assertIn(key, fs)
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if len(expect_val) > 1:
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self.assertEqual(fs.getvalue(key), expect_val)
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else:
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self.assertEqual(fs.getvalue(key), expect_val[0])
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@warnings_helper.ignore_warnings(category=DeprecationWarning)
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def test_log(self):
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cgi.log("Testing")
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cgi.logfp = StringIO()
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cgi.initlog("%s", "Testing initlog 1")
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cgi.log("%s", "Testing log 2")
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self.assertEqual(cgi.logfp.getvalue(), "Testing initlog 1\nTesting log 2\n")
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if os.path.exists(os.devnull):
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cgi.logfp = None
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cgi.logfile = os.devnull
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cgi.initlog("%s", "Testing log 3")
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self.addCleanup(cgi.closelog)
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cgi.log("Testing log 4")
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def test_fieldstorage_readline(self):
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# FieldStorage uses readline, which has the capacity to read all
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# contents of the input file into memory; we use readline's size argument
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# to prevent that for files that do not contain any newlines in
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# non-GET/HEAD requests
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class TestReadlineFile:
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def __init__(self, file):
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self.file = file
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self.numcalls = 0
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def readline(self, size=None):
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self.numcalls += 1
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if size:
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return self.file.readline(size)
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else:
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return self.file.readline()
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def __getattr__(self, name):
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file = self.__dict__['file']
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a = getattr(file, name)
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if not isinstance(a, int):
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setattr(self, name, a)
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return a
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f = TestReadlineFile(tempfile.TemporaryFile("wb+"))
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self.addCleanup(f.close)
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f.write(b'x' * 256 * 1024)
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f.seek(0)
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env = {'REQUEST_METHOD':'PUT'}
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fs = cgi.FieldStorage(fp=f, environ=env)
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self.addCleanup(fs.file.close)
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# if we're not chunking properly, readline is only called twice
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# (by read_binary); if we are chunking properly, it will be called 5 times
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# as long as the chunksize is 1 << 16.
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self.assertGreater(f.numcalls, 2)
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f.close()
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def test_fieldstorage_multipart(self):
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#Test basic FieldStorage multipart parsing
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env = {
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'REQUEST_METHOD': 'POST',
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'CONTENT_TYPE': 'multipart/form-data; boundary={}'.format(BOUNDARY),
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'CONTENT_LENGTH': '558'}
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fp = BytesIO(POSTDATA.encode('latin-1'))
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fs = cgi.FieldStorage(fp, environ=env, encoding="latin-1")
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self.assertEqual(len(fs.list), 4)
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expect = [{'name':'id', 'filename':None, 'value':'1234'},
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{'name':'title', 'filename':None, 'value':''},
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{'name':'file', 'filename':'test.txt', 'value':b'Testing 123.\n'},
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{'name':'submit', 'filename':None, 'value':' Add '}]
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for x in range(len(fs.list)):
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for k, exp in expect[x].items():
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got = getattr(fs.list[x], k)
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self.assertEqual(got, exp)
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def test_fieldstorage_multipart_leading_whitespace(self):
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env = {
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'REQUEST_METHOD': 'POST',
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'CONTENT_TYPE': 'multipart/form-data; boundary={}'.format(BOUNDARY),
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'CONTENT_LENGTH': '560'}
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# Add some leading whitespace to our post data that will cause the
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# first line to not be the innerboundary.
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fp = BytesIO(b"\r\n" + POSTDATA.encode('latin-1'))
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fs = cgi.FieldStorage(fp, environ=env, encoding="latin-1")
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self.assertEqual(len(fs.list), 4)
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expect = [{'name':'id', 'filename':None, 'value':'1234'},
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{'name':'title', 'filename':None, 'value':''},
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{'name':'file', 'filename':'test.txt', 'value':b'Testing 123.\n'},
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{'name':'submit', 'filename':None, 'value':' Add '}]
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for x in range(len(fs.list)):
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for k, exp in expect[x].items():
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got = getattr(fs.list[x], k)
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self.assertEqual(got, exp)
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def test_fieldstorage_multipart_non_ascii(self):
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#Test basic FieldStorage multipart parsing
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env = {'REQUEST_METHOD':'POST',
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'CONTENT_TYPE': 'multipart/form-data; boundary={}'.format(BOUNDARY),
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'CONTENT_LENGTH':'558'}
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for encoding in ['iso-8859-1','utf-8']:
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fp = BytesIO(POSTDATA_NON_ASCII.encode(encoding))
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fs = cgi.FieldStorage(fp, environ=env,encoding=encoding)
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self.assertEqual(len(fs.list), 1)
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expect = [{'name':'id', 'filename':None, 'value':'\xe7\xf1\x80'}]
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for x in range(len(fs.list)):
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for k, exp in expect[x].items():
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got = getattr(fs.list[x], k)
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self.assertEqual(got, exp)
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def test_fieldstorage_multipart_maxline(self):
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# Issue #18167
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maxline = 1 << 16
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self.maxDiff = None
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def check(content):
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data = """---123
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Content-Disposition: form-data; name="upload"; filename="fake.txt"
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Content-Type: text/plain
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%s
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---123--
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""".replace('\n', '\r\n') % content
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environ = {
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'CONTENT_LENGTH': str(len(data)),
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'CONTENT_TYPE': 'multipart/form-data; boundary=-123',
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'REQUEST_METHOD': 'POST',
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}
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self.assertEqual(gen_result(data, environ),
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{'upload': content.encode('latin1')})
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check('x' * (maxline - 1))
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check('x' * (maxline - 1) + '\r')
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check('x' * (maxline - 1) + '\r' + 'y' * (maxline - 1))
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def test_fieldstorage_multipart_w3c(self):
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# Test basic FieldStorage multipart parsing (W3C sample)
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env = {
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'REQUEST_METHOD': 'POST',
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'CONTENT_TYPE': 'multipart/form-data; boundary={}'.format(BOUNDARY_W3),
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'CONTENT_LENGTH': str(len(POSTDATA_W3))}
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fp = BytesIO(POSTDATA_W3.encode('latin-1'))
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fs = cgi.FieldStorage(fp, environ=env, encoding="latin-1")
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self.assertEqual(len(fs.list), 2)
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self.assertEqual(fs.list[0].name, 'submit-name')
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self.assertEqual(fs.list[0].value, 'Larry')
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self.assertEqual(fs.list[1].name, 'files')
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files = fs.list[1].value
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self.assertEqual(len(files), 2)
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expect = [{'name': None, 'filename': 'file1.txt', 'value': b'... contents of file1.txt ...'},
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{'name': None, 'filename': 'file2.gif', 'value': b'...contents of file2.gif...'}]
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for x in range(len(files)):
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for k, exp in expect[x].items():
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got = getattr(files[x], k)
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self.assertEqual(got, exp)
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def test_fieldstorage_part_content_length(self):
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BOUNDARY = "JfISa01"
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POSTDATA = """--JfISa01
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Content-Disposition: form-data; name="submit-name"
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Content-Length: 5
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Larry
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--JfISa01"""
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env = {
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'REQUEST_METHOD': 'POST',
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'CONTENT_TYPE': 'multipart/form-data; boundary={}'.format(BOUNDARY),
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'CONTENT_LENGTH': str(len(POSTDATA))}
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fp = BytesIO(POSTDATA.encode('latin-1'))
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fs = cgi.FieldStorage(fp, environ=env, encoding="latin-1")
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self.assertEqual(len(fs.list), 1)
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self.assertEqual(fs.list[0].name, 'submit-name')
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self.assertEqual(fs.list[0].value, 'Larry')
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def test_field_storage_multipart_no_content_length(self):
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fp = BytesIO(b"""--MyBoundary
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Content-Disposition: form-data; name="my-arg"; filename="foo"
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Test
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--MyBoundary--
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""")
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env = {
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"REQUEST_METHOD": "POST",
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"CONTENT_TYPE": "multipart/form-data; boundary=MyBoundary",
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"wsgi.input": fp,
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}
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fields = cgi.FieldStorage(fp, environ=env)
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self.assertEqual(len(fields["my-arg"].file.read()), 5)
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def test_fieldstorage_as_context_manager(self):
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fp = BytesIO(b'x' * 10)
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env = {'REQUEST_METHOD': 'PUT'}
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with cgi.FieldStorage(fp=fp, environ=env) as fs:
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content = fs.file.read()
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self.assertFalse(fs.file.closed)
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self.assertTrue(fs.file.closed)
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self.assertEqual(content, 'x' * 10)
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with self.assertRaisesRegex(ValueError, 'I/O operation on closed file'):
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fs.file.read()
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_qs_result = {
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'key1': 'value1',
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'key2': ['value2x', 'value2y'],
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'key3': 'value3',
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'key4': 'value4'
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}
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def testQSAndUrlEncode(self):
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data = "key2=value2x&key3=value3&key4=value4"
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environ = {
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'CONTENT_LENGTH': str(len(data)),
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'CONTENT_TYPE': 'application/x-www-form-urlencoded',
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'QUERY_STRING': 'key1=value1&key2=value2y',
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'REQUEST_METHOD': 'POST',
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}
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v = gen_result(data, environ)
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self.assertEqual(self._qs_result, v)
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def test_max_num_fields(self):
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# For application/x-www-form-urlencoded
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data = '&'.join(['a=a']*11)
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environ = {
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'CONTENT_LENGTH': str(len(data)),
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'CONTENT_TYPE': 'application/x-www-form-urlencoded',
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'REQUEST_METHOD': 'POST',
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}
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with self.assertRaises(ValueError):
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cgi.FieldStorage(
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fp=BytesIO(data.encode()),
|
|
environ=environ,
|
|
max_num_fields=10,
|
|
)
|
|
|
|
# For multipart/form-data
|
|
data = """---123
|
|
Content-Disposition: form-data; name="a"
|
|
|
|
3
|
|
---123
|
|
Content-Type: application/x-www-form-urlencoded
|
|
|
|
a=4
|
|
---123
|
|
Content-Type: application/x-www-form-urlencoded
|
|
|
|
a=5
|
|
---123--
|
|
"""
|
|
environ = {
|
|
'CONTENT_LENGTH': str(len(data)),
|
|
'CONTENT_TYPE': 'multipart/form-data; boundary=-123',
|
|
'QUERY_STRING': 'a=1&a=2',
|
|
'REQUEST_METHOD': 'POST',
|
|
}
|
|
|
|
# 2 GET entities
|
|
# 1 top level POST entities
|
|
# 1 entity within the second POST entity
|
|
# 1 entity within the third POST entity
|
|
with self.assertRaises(ValueError):
|
|
cgi.FieldStorage(
|
|
fp=BytesIO(data.encode()),
|
|
environ=environ,
|
|
max_num_fields=4,
|
|
)
|
|
cgi.FieldStorage(
|
|
fp=BytesIO(data.encode()),
|
|
environ=environ,
|
|
max_num_fields=5,
|
|
)
|
|
|
|
def testQSAndFormData(self):
|
|
data = """---123
|
|
Content-Disposition: form-data; name="key2"
|
|
|
|
value2y
|
|
---123
|
|
Content-Disposition: form-data; name="key3"
|
|
|
|
value3
|
|
---123
|
|
Content-Disposition: form-data; name="key4"
|
|
|
|
value4
|
|
---123--
|
|
"""
|
|
environ = {
|
|
'CONTENT_LENGTH': str(len(data)),
|
|
'CONTENT_TYPE': 'multipart/form-data; boundary=-123',
|
|
'QUERY_STRING': 'key1=value1&key2=value2x',
|
|
'REQUEST_METHOD': 'POST',
|
|
}
|
|
v = gen_result(data, environ)
|
|
self.assertEqual(self._qs_result, v)
|
|
|
|
def testQSAndFormDataFile(self):
|
|
data = """---123
|
|
Content-Disposition: form-data; name="key2"
|
|
|
|
value2y
|
|
---123
|
|
Content-Disposition: form-data; name="key3"
|
|
|
|
value3
|
|
---123
|
|
Content-Disposition: form-data; name="key4"
|
|
|
|
value4
|
|
---123
|
|
Content-Disposition: form-data; name="upload"; filename="fake.txt"
|
|
Content-Type: text/plain
|
|
|
|
this is the content of the fake file
|
|
|
|
---123--
|
|
"""
|
|
environ = {
|
|
'CONTENT_LENGTH': str(len(data)),
|
|
'CONTENT_TYPE': 'multipart/form-data; boundary=-123',
|
|
'QUERY_STRING': 'key1=value1&key2=value2x',
|
|
'REQUEST_METHOD': 'POST',
|
|
}
|
|
result = self._qs_result.copy()
|
|
result.update({
|
|
'upload': b'this is the content of the fake file\n'
|
|
})
|
|
v = gen_result(data, environ)
|
|
self.assertEqual(result, v)
|
|
|
|
def test_parse_header(self):
|
|
self.assertEqual(
|
|
cgi.parse_header("text/plain"),
|
|
("text/plain", {}))
|
|
self.assertEqual(
|
|
cgi.parse_header("text/vnd.just.made.this.up ; "),
|
|
("text/vnd.just.made.this.up", {}))
|
|
self.assertEqual(
|
|
cgi.parse_header("text/plain;charset=us-ascii"),
|
|
("text/plain", {"charset": "us-ascii"}))
|
|
self.assertEqual(
|
|
cgi.parse_header('text/plain ; charset="us-ascii"'),
|
|
("text/plain", {"charset": "us-ascii"}))
|
|
self.assertEqual(
|
|
cgi.parse_header('text/plain ; charset="us-ascii"; another=opt'),
|
|
("text/plain", {"charset": "us-ascii", "another": "opt"}))
|
|
self.assertEqual(
|
|
cgi.parse_header('attachment; filename="silly.txt"'),
|
|
("attachment", {"filename": "silly.txt"}))
|
|
self.assertEqual(
|
|
cgi.parse_header('attachment; filename="strange;name"'),
|
|
("attachment", {"filename": "strange;name"}))
|
|
self.assertEqual(
|
|
cgi.parse_header('attachment; filename="strange;name";size=123;'),
|
|
("attachment", {"filename": "strange;name", "size": "123"}))
|
|
self.assertEqual(
|
|
cgi.parse_header('form-data; name="files"; filename="fo\\"o;bar"'),
|
|
("form-data", {"name": "files", "filename": 'fo"o;bar'}))
|
|
|
|
def test_all(self):
|
|
not_exported = {
|
|
"logfile", "logfp", "initlog", "dolog", "nolog", "closelog", "log",
|
|
"maxlen", "valid_boundary"}
|
|
support.check__all__(self, cgi, not_exported=not_exported)
|
|
|
|
|
|
BOUNDARY = "---------------------------721837373350705526688164684"
|
|
|
|
POSTDATA = """-----------------------------721837373350705526688164684
|
|
Content-Disposition: form-data; name="id"
|
|
|
|
1234
|
|
-----------------------------721837373350705526688164684
|
|
Content-Disposition: form-data; name="title"
|
|
|
|
|
|
-----------------------------721837373350705526688164684
|
|
Content-Disposition: form-data; name="file"; filename="test.txt"
|
|
Content-Type: text/plain
|
|
|
|
Testing 123.
|
|
|
|
-----------------------------721837373350705526688164684
|
|
Content-Disposition: form-data; name="submit"
|
|
|
|
Add\x20
|
|
-----------------------------721837373350705526688164684--
|
|
"""
|
|
|
|
POSTDATA_NON_ASCII = """-----------------------------721837373350705526688164684
|
|
Content-Disposition: form-data; name="id"
|
|
|
|
\xe7\xf1\x80
|
|
-----------------------------721837373350705526688164684
|
|
"""
|
|
|
|
# http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4
|
|
BOUNDARY_W3 = "AaB03x"
|
|
POSTDATA_W3 = """--AaB03x
|
|
Content-Disposition: form-data; name="submit-name"
|
|
|
|
Larry
|
|
--AaB03x
|
|
Content-Disposition: form-data; name="files"
|
|
Content-Type: multipart/mixed; boundary=BbC04y
|
|
|
|
--BbC04y
|
|
Content-Disposition: file; filename="file1.txt"
|
|
Content-Type: text/plain
|
|
|
|
... contents of file1.txt ...
|
|
--BbC04y
|
|
Content-Disposition: file; filename="file2.gif"
|
|
Content-Type: image/gif
|
|
Content-Transfer-Encoding: binary
|
|
|
|
...contents of file2.gif...
|
|
--BbC04y--
|
|
--AaB03x--
|
|
"""
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|