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R3600 invenio-infoscience
utils.py
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# -*- coding: utf-8 -*-
#
# This file is part of Invenio.
# Copyright (C) 2009, 2010, 2011, 2014, 2015 CERN.
#
# Invenio is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# Invenio is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Invenio; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""
mod_python->WSGI Framework utilities
This code has been taken from mod_python original source code and rearranged
here to easying the migration from mod_python to wsgi.
The code taken from mod_python is under the following License.
"""
# Copyright 2004 Apache Software Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License"); you
# may not use this file except in compliance with the License. You
# may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied. See the License for the specific language governing
# permissions and limitations under the License.
#
# Originally developed by Gregory Trubetskoy.
#
# $Id: apache.py 468216 2006-10-27 00:54:12Z grahamd $
from
wsgiref.headers
import
Headers
import
time
import
re
import
os
import
cgi
import
cStringIO
import
tempfile
from
types
import
TypeType
,
ClassType
,
BuiltinFunctionType
,
MethodType
,
ListType
from
invenio.config
import
CFG_TMPDIR
,
CFG_TMPSHAREDDIR
from
invenio.utils.apache
import
\
SERVER_RETURN
,
\
HTTP_LENGTH_REQUIRED
,
\
HTTP_BAD_REQUEST
,
\
InvenioWebInterfaceWSGIContentLenghtError
,
\
InvenioWebInterfaceWSGIContentTypeError
,
\
InvenioWebInterfaceWSGIContentMD5Error
class
table
(
Headers
):
add
=
Headers
.
add_header
iteritems
=
Headers
.
items
def
__getitem__
(
self
,
name
):
ret
=
Headers
.
__getitem__
(
self
,
name
)
if
ret
is
None
:
return
''
else
:
return
str
(
ret
)
# Some functions made public
exists_config_define
=
lambda
dummy
:
True
# Some constants
class
metaCookie
(
type
):
def
__new__
(
cls
,
clsname
,
bases
,
clsdict
):
_valid_attr
=
(
"version"
,
"path"
,
"domain"
,
"secure"
,
"comment"
,
"expires"
,
"max_age"
,
# RFC 2965
"commentURL"
,
"discard"
,
"port"
,
# Microsoft Extension
"httponly"
)
# _valid_attr + property values
# (note __slots__ is a new Python feature, it
# prevents any other attribute from being set)
__slots__
=
_valid_attr
+
(
"name"
,
"value"
,
"_value"
,
"_expires"
,
"__data__"
)
clsdict
[
"_valid_attr"
]
=
_valid_attr
clsdict
[
"__slots__"
]
=
__slots__
def
set_expires
(
self
,
value
):
if
type
(
value
)
==
type
(
""
):
# if it's a string, it should be
# valid format as per Netscape spec
try
:
t
=
time
.
strptime
(
value
,
"%a,
%d
-%b-%Y %H:%M:%S GMT"
)
except
ValueError
:
raise
ValueError
,
"Invalid expires time:
%s
"
%
value
t
=
time
.
mktime
(
t
)
else
:
# otherwise assume it's a number
# representing time as from time.time()
t
=
value
value
=
time
.
strftime
(
"%a,
%d
-%b-%Y %H:%M:%S GMT"
,
time
.
gmtime
(
t
))
self
.
_expires
=
"
%s
"
%
value
def
get_expires
(
self
):
return
self
.
_expires
clsdict
[
"expires"
]
=
property
(
fget
=
get_expires
,
fset
=
set_expires
)
return
type
.
__new__
(
cls
,
clsname
,
bases
,
clsdict
)
class
Cookie
(
object
):
"""
This class implements the basic Cookie functionality. Note that
unlike the Python Standard Library Cookie class, this class represents
a single cookie (not a list of Morsels).
"""
__metaclass__
=
metaCookie
DOWNGRADE
=
0
IGNORE
=
1
EXCEPTION
=
3
def
parse
(
Class
,
str
,
**
kw
):
"""
Parse a Cookie or Set-Cookie header value, and return
a dict of Cookies. Note: the string should NOT include the
header name, only the value.
"""
dict
=
_parse_cookie
(
str
,
Class
,
**
kw
)
return
dict
parse
=
classmethod
(
parse
)
def
__init__
(
self
,
name
,
value
,
**
kw
):
"""
This constructor takes at least a name and value as the
arguments, as well as optionally any of allowed cookie attributes
as defined in the existing cookie standards.
"""
self
.
name
,
self
.
value
=
name
,
value
for
k
in
kw
:
setattr
(
self
,
k
.
lower
(),
kw
[
k
])
# subclasses can use this for internal stuff
self
.
__data__
=
{}
def
__str__
(
self
):
"""
Provides the string representation of the Cookie suitable for
sending to the browser. Note that the actual header name will
not be part of the string.
This method makes no attempt to automatically double-quote
strings that contain special characters, even though the RFC's
dictate this. This is because doing so seems to confuse most
browsers out there.
"""
result
=
[
"
%s
=
%s
"
%
(
self
.
name
,
self
.
value
)]
# pylint: disable=E1101
# The attribute _valid_attr is provided by the metaclass 'metaCookie'.
for
name
in
self
.
_valid_attr
:
if
hasattr
(
self
,
name
):
if
name
in
(
"secure"
,
"discard"
):
result
.
append
(
name
)
elif
name
==
"httponly"
:
result
.
append
(
"HttpOnly"
)
else
:
result
.
append
(
"
%s
=
%s
"
%
(
name
,
getattr
(
self
,
name
)))
# pylint: enable=E1101
return
"; "
.
join
(
result
)
def
__repr__
(
self
):
return
'<
%s
:
%s
>'
%
(
self
.
__class__
.
__name__
,
str
(
self
))
# This is a simplified and in some places corrected
# (at least I think it is) pattern from standard lib Cookie.py
_cookiePattern
=
re
.
compile
(
r"(?x)"
# Verbose pattern
r"[,\ ]*"
# space/comma (RFC2616 4.2) before attr-val is eaten
r"(?P<key>"
# Start of group 'key'
r"[^;\ =]+"
# anything but ';', ' ' or '='
r")"
# End of group 'key'
r"\ *(=\ *)?"
# a space, then may be "=", more space
r"(?P<val>"
# Start of group 'val'
r'"(?:[^\\"]|\\.)*"'
# a doublequoted string
r"|"
# or
r"[^;]*"
# any word or empty string
r")"
# End of group 'val'
r"\s*;?"
# probably ending in a semi-colon
)
def
_parse_cookie
(
str
,
Class
,
names
=
None
):
# XXX problem is we should allow duplicate
# strings
result
=
{}
matchIter
=
_cookiePattern
.
finditer
(
str
)
for
match
in
matchIter
:
key
,
val
=
match
.
group
(
"key"
),
match
.
group
(
"val"
)
# We just ditch the cookies names which start with a dollar sign since
# those are in fact RFC2965 cookies attributes. See bug [#MODPYTHON-3].
if
key
[
0
]
!=
'$'
and
names
is
None
or
key
in
names
:
result
[
key
]
=
Class
(
key
,
val
)
return
result
_RE_BAD_MSIE
=
re
.
compile
(
"MSIE\s+(\d+\.\d+)"
)
def
add_cookies
(
req
,
cookies
):
"""
Sets one or more cookie in outgoing headers and adds a cache
directive so that caches don't cache the cookie.
"""
if
"Set-Cookie"
not
in
req
.
headers_out
:
g
=
_RE_BAD_MSIE
.
search
(
req
.
headers_in
.
get
(
'User-Agent'
,
"MSIE 6.0"
))
bad_msie
=
g
and
float
(
g
.
group
(
1
))
<
9.0
if
not
(
bad_msie
and
req
.
is_https
()):
req
.
headers_out
.
add
(
"Cache-Control"
,
'no-cache="set-cookie"'
)
for
cookie
in
cookies
:
req
.
headers_out
.
add
(
"Set-Cookie"
,
str
(
cookie
))
def
get_cookies
(
req
,
cls
=
Cookie
,
**
kw
):
"""
A shorthand for retrieveing and parsing cookies given
a Cookie class. The class must be one of the classes from
this module.
"""
if
"cookie"
not
in
getattr
(
req
,
"headers_in"
,
{}):
return
{}
cookies
=
req
.
headers_in
[
"cookie"
]
if
isinstance
(
cookies
,
list
):
cookies
=
'; '
.
join
(
cookies
)
return
cls
.
parse
(
cookies
,
**
kw
)
def
get_cookie
(
req
,
name
,
cls
=
Cookie
,
**
kw
):
cookies
=
get_cookies
(
req
,
cls
,
names
=
[
name
],
**
kw
)
if
name
in
cookies
:
return
cookies
[
name
]
parse_qs
=
cgi
.
parse_qs
parse_qsl
=
cgi
.
parse_qsl
# Maximum line length for reading. (64KB)
# Fixes memory error when upload large files such as 700+MB ISOs.
readBlockSize
=
65368
""" The classes below are a (almost) a drop-in replacement for the
standard cgi.py FieldStorage class. They should have pretty much the
same functionality.
These classes differ in that unlike cgi.FieldStorage, they are not
recursive. The class FieldStorage contains a list of instances of
Field class. Field class is incapable of storing anything in it.
These objects should be considerably faster than the ones in cgi.py
because they do not expect CGI environment, and are
optimized specifically for Apache and mod_python.
"""
class
Field
:
def
__init__
(
self
,
name
,
*
args
,
**
kwargs
):
self
.
name
=
name
# Some third party packages such as Trac create
# instances of the Field object and insert it
# directly into the list of form fields. To
# maintain backward compatibility check for
# where more than just a field name is supplied
# and invoke an additional initialisation step
# to process the arguments. Ideally, third party
# code should use the add_field() method of the
# form, but if they need to maintain backward
# compatibility with older versions of mod_python
# they will not have a choice but to use old
# way of doing things and thus we need this code
# for the forseeable future to cope with that.
if
args
or
kwargs
:
self
.
__bc_init__
(
*
args
,
**
kwargs
)
def
__bc_init__
(
self
,
file
,
ctype
,
type_options
,
disp
,
disp_options
,
headers
=
{}):
self
.
file
=
file
self
.
type
=
ctype
self
.
type_options
=
type_options
self
.
disposition
=
disp
self
.
disposition_options
=
disp_options
if
"filename"
in
disp_options
:
self
.
filename
=
disp_options
[
"filename"
]
else
:
self
.
filename
=
None
self
.
headers
=
headers
def
__repr__
(
self
):
"""Return printable representation."""
return
"Field(
%s
,
%s
)"
%
(
`self.name`
,
`self.value`
)
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
)
else
:
value
=
None
return
value
def
__del__
(
self
):
self
.
file
.
close
()
class
StringField
(
str
):
""" This class is basically a string with
added attributes for compatibility with std lib cgi.py. Basically, this
works the opposite of Field, as it stores its data in a string, but creates
a file on demand. Field creates a value on demand and stores data in a file.
"""
filename
=
None
headers
=
{}
ctype
=
"text/plain"
type_options
=
{}
disposition
=
None
disp_options
=
None
def
__new__
(
cls
,
value
):
'''Create StringField instance. You'll have to set name yourself.'''
obj
=
str
.
__new__
(
cls
,
value
)
obj
.
value
=
value
return
obj
def
__str__
(
self
):
return
str
.
__str__
(
self
)
def
__getattr__
(
self
,
name
):
if
name
!=
'file'
:
raise
AttributeError
,
name
self
.
file
=
cStringIO
.
StringIO
(
self
.
value
)
return
self
.
file
def
__repr__
(
self
):
"""Return printable representation (to pass unit tests)."""
return
"Field(
%s
,
%s
)"
%
(
`self.name`
,
`self.value`
)
class
FieldList
(
list
):
def
__init__
(
self
):
self
.
__table
=
None
list
.
__init__
(
self
)
def
table
(
self
):
if
self
.
__table
is
None
:
self
.
__table
=
{}
for
item
in
self
:
if
item
.
name
in
self
.
__table
:
self
.
__table
[
item
.
name
]
.
append
(
item
)
else
:
self
.
__table
[
item
.
name
]
=
[
item
]
return
self
.
__table
def
__delitem__
(
self
,
*
args
):
self
.
__table
=
None
return
list
.
__delitem__
(
self
,
*
args
)
def
__delslice__
(
self
,
*
args
):
self
.
__table
=
None
return
list
.
__delslice__
(
self
,
*
args
)
def
__iadd__
(
self
,
*
args
):
self
.
__table
=
None
return
list
.
__iadd__
(
self
,
*
args
)
def
__imul__
(
self
,
*
args
):
self
.
__table
=
None
return
list
.
__imul__
(
self
,
*
args
)
def
__setitem__
(
self
,
*
args
):
self
.
__table
=
None
return
list
.
__setitem__
(
self
,
*
args
)
def
__setslice__
(
self
,
*
args
):
self
.
__table
=
None
return
list
.
__setslice__
(
self
,
*
args
)
def
append
(
self
,
*
args
):
self
.
__table
=
None
return
list
.
append
(
self
,
*
args
)
def
extend
(
self
,
*
args
):
self
.
__table
=
None
return
list
.
extend
(
self
,
*
args
)
def
insert
(
self
,
*
args
):
self
.
__table
=
None
return
list
.
insert
(
self
,
*
args
)
def
pop
(
self
,
*
args
):
self
.
__table
=
None
return
list
.
pop
(
self
,
*
args
)
def
remove
(
self
,
*
args
):
self
.
__table
=
None
return
list
.
remove
(
self
,
*
args
)
class
FieldStorage
:
def
__init__
(
self
,
req
,
keep_blank_values
=
0
,
strict_parsing
=
0
,
file_callback
=
None
,
field_callback
=
None
,
to_tmp_shared
=
False
):
#
# Whenever readline is called ALWAYS use the max size EVEN when
# not expecting a long line. - this helps protect against
# malformed content from exhausting memory.
#
self
.
list
=
FieldList
()
self
.
wsgi_input_consumed
=
False
# always process GET-style parameters
if
req
.
args
:
pairs
=
parse_qsl
(
req
.
args
,
keep_blank_values
)
for
pair
in
pairs
:
self
.
add_field
(
pair
[
0
],
pair
[
1
])
if
req
.
method
!=
"POST"
:
return
try
:
clen
=
int
(
req
.
headers_in
[
"content-length"
])
except
(
KeyError
,
ValueError
):
# absent content-length is not acceptable
raise
SERVER_RETURN
,
HTTP_LENGTH_REQUIRED
self
.
clen
=
clen
self
.
count
=
0
if
"content-type"
not
in
req
.
headers_in
:
ctype
=
"application/x-www-form-urlencoded"
else
:
ctype
=
req
.
headers_in
[
"content-type"
]
if
ctype
.
startswith
(
"application/x-www-form-urlencoded"
):
pairs
=
parse_qsl
(
req
.
read
(
clen
),
keep_blank_values
)
self
.
wsgi_input_consumed
=
True
for
pair
in
pairs
:
self
.
add_field
(
pair
[
0
],
pair
[
1
])
return
elif
not
ctype
.
startswith
(
"multipart/"
):
# we don't understand this content-type
return
self
.
wsgi_input_consumed
=
True
# figure out boundary
try
:
i
=
ctype
.
lower
()
.
rindex
(
"boundary="
)
boundary
=
ctype
[
i
+
9
:]
if
len
(
boundary
)
>=
2
and
boundary
[
0
]
==
boundary
[
-
1
]
==
'"'
:
boundary
=
boundary
[
1
:
-
1
]
boundary
=
re
.
compile
(
"--"
+
re
.
escape
(
boundary
)
+
"(--)?
\r
?
\n
"
)
except
ValueError
:
raise
SERVER_RETURN
,
HTTP_BAD_REQUEST
# read until boundary
self
.
read_to_boundary
(
req
,
boundary
,
None
)
end_of_stream
=
False
while
not
end_of_stream
and
not
self
.
eof
():
# jjj JIM BEGIN WHILE
## parse headers
ctype
,
type_options
=
"text/plain"
,
{}
disp
,
disp_options
=
None
,
{}
headers
=
table
([])
line
=
req
.
readline
(
readBlockSize
)
self
.
count
+=
len
(
line
)
if
self
.
eof
():
end_of_stream
=
True
match
=
boundary
.
match
(
line
)
if
(
not
line
)
or
match
:
# we stop if we reached the end of the stream or a stop
# boundary (which means '--' after the boundary) we
# continue to the next part if we reached a simple
# boundary in either case this would mean the entity is
# malformed, but we're tolerating it anyway.
end_of_stream
=
(
not
line
)
or
(
match
.
group
(
1
)
is
not
None
)
continue
skip_this_part
=
False
while
line
not
in
(
'
\r
'
,
'
\r\n
'
):
nextline
=
req
.
readline
(
readBlockSize
)
self
.
count
+=
len
(
nextline
)
if
self
.
eof
():
end_of_stream
=
True
while
nextline
and
nextline
[
0
]
in
[
' '
,
'
\t
'
]:
line
=
line
+
nextline
nextline
=
req
.
readline
(
readBlockSize
)
self
.
count
+=
len
(
nextline
)
if
self
.
eof
():
end_of_stream
=
True
# we read the headers until we reach an empty line
# NOTE : a single \n would mean the entity is malformed, but
# we're tolerating it anyway
h
,
v
=
line
.
split
(
":"
,
1
)
headers
.
add
(
h
,
v
)
h
=
h
.
lower
()
if
h
==
"content-disposition"
:
disp
,
disp_options
=
parse_header
(
v
)
elif
h
==
"content-type"
:
ctype
,
type_options
=
parse_header
(
v
)
#
# NOTE: FIX up binary rubbish sent as content type
# from Microsoft IE 6.0 when sending a file which
# does not have a suffix.
#
if
ctype
.
find
(
'/'
)
==
-
1
:
ctype
=
'application/octet-stream'
line
=
nextline
match
=
boundary
.
match
(
line
)
if
(
not
line
)
or
match
:
# we stop if we reached the end of the stream or a
# stop boundary (which means '--' after the
# boundary) we continue to the next part if we
# reached a simple boundary in either case this
# would mean the entity is malformed, but we're
# tolerating it anyway.
skip_this_part
=
True
end_of_stream
=
(
not
line
)
or
(
match
.
group
(
1
)
is
not
None
)
break
if
skip_this_part
:
continue
if
"name"
in
disp_options
:
name
=
disp_options
[
"name"
]
else
:
name
=
None
# create a file object
# is this a file?
if
"filename"
in
disp_options
:
if
file_callback
and
callable
(
file_callback
):
file
=
file_callback
(
disp_options
[
"filename"
])
else
:
if
to_tmp_shared
:
file
=
tempfile
.
NamedTemporaryFile
(
dir
=
CFG_TMPSHAREDDIR
)
else
:
file
=
tempfile
.
NamedTemporaryFile
(
dir
=
CFG_TMPDIR
)
else
:
if
field_callback
and
callable
(
field_callback
):
file
=
field_callback
()
else
:
file
=
cStringIO
.
StringIO
()
# read it in
self
.
read_to_boundary
(
req
,
boundary
,
file
)
if
self
.
eof
():
end_of_stream
=
True
file
.
seek
(
0
)
# make a Field
if
"filename"
in
disp_options
:
field
=
Field
(
name
)
field
.
filename
=
disp_options
[
"filename"
]
else
:
field
=
StringField
(
file
.
read
())
field
.
name
=
name
field
.
file
=
file
field
.
type
=
ctype
field
.
type_options
=
type_options
field
.
disposition
=
disp
field
.
disposition_options
=
disp_options
field
.
headers
=
headers
self
.
list
.
append
(
field
)
def
add_field
(
self
,
key
,
value
):
"""Insert a field as key/value pair"""
item
=
StringField
(
value
)
item
.
name
=
key
self
.
list
.
append
(
item
)
def
__setitem__
(
self
,
key
,
value
):
table
=
self
.
list
.
table
()
if
key
in
table
:
items
=
table
[
key
]
for
item
in
items
:
self
.
list
.
remove
(
item
)
item
=
StringField
(
value
)
item
.
name
=
key
self
.
list
.
append
(
item
)
def
read_to_boundary
(
self
,
req
,
boundary
,
file
):
previous_delimiter
=
None
while
not
self
.
eof
():
line
=
req
.
readline
(
readBlockSize
)
self
.
count
+=
len
(
line
)
if
not
line
:
# end of stream
if
file
is
not
None
and
previous_delimiter
is
not
None
:
file
.
write
(
previous_delimiter
)
return
True
match
=
boundary
.
match
(
line
)
if
match
:
# the line is the boundary, so we bail out
# if the two last chars are '--' it is the end of the entity
return
match
.
group
(
1
)
is
not
None
if
line
[
-
2
:]
==
'
\r\n
'
:
# the line ends with a \r\n, which COULD be part
# of the next boundary. We write the previous line delimiter
# then we write the line without \r\n and save it for the next
# iteration if it was not part of the boundary
if
file
is
not
None
:
if
previous_delimiter
is
not
None
:
file
.
write
(
previous_delimiter
)
file
.
write
(
line
[:
-
2
])
previous_delimiter
=
'
\r\n
'
elif
line
[
-
1
:]
==
'
\r
'
:
# the line ends with \r, which is only possible if
# readBlockSize bytes have been read. In that case the
# \r COULD be part of the next boundary, so we save it
# for the next iteration
assert
len
(
line
)
==
readBlockSize
if
file
is
not
None
:
if
previous_delimiter
is
not
None
:
file
.
write
(
previous_delimiter
)
file
.
write
(
line
[:
-
1
])
previous_delimiter
=
'
\r
'
elif
line
==
'
\n
'
and
previous_delimiter
==
'
\r
'
:
# the line us a single \n and we were in the middle of a \r\n,
# so we complete the delimiter
previous_delimiter
=
'
\r\n
'
else
:
if
file
is
not
None
:
if
previous_delimiter
is
not
None
:
file
.
write
(
previous_delimiter
)
file
.
write
(
line
)
previous_delimiter
=
None
def
eof
(
self
):
return
self
.
clen
<=
self
.
count
def
__getitem__
(
self
,
key
):
"""Dictionary style indexing."""
found
=
self
.
list
.
table
()[
key
]
if
len
(
found
)
==
1
:
return
found
[
0
]
else
:
return
found
def
get
(
self
,
key
,
default
):
try
:
return
self
.
__getitem__
(
key
)
except
(
TypeError
,
KeyError
):
return
default
def
keys
(
self
):
"""Dictionary style keys() method."""
return
self
.
list
.
table
()
.
keys
()
def
__iter__
(
self
):
return
iter
(
self
.
keys
())
def
__repr__
(
self
):
return
repr
(
self
.
list
.
table
())
def
has_key
(
self
,
key
):
"""Dictionary style has_key() method."""
return
(
key
in
self
.
list
.
table
())
__contains__
=
has_key
def
__len__
(
self
):
"""Dictionary style len(x) support."""
return
len
(
self
.
list
.
table
())
def
getfirst
(
self
,
key
,
default
=
None
):
""" return the first value received """
try
:
return
self
.
list
.
table
()[
key
][
0
]
except
KeyError
:
return
default
def
getlist
(
self
,
key
):
""" return a list of received values """
try
:
return
self
.
list
.
table
()[
key
]
except
KeyError
:
return
[]
def
items
(
self
):
"""Dictionary-style items(), except that items are returned in the same
order as they were supplied in the form."""
return
[(
item
.
name
,
item
)
for
item
in
self
.
list
]
def
__delitem__
(
self
,
key
):
table
=
self
.
list
.
table
()
values
=
table
[
key
]
for
value
in
values
:
self
.
list
.
remove
(
value
)
def
clear
(
self
):
self
.
list
=
FieldList
()
def
parse_header
(
line
):
"""Parse a Content-type like header.
Return the main content-type and a dictionary of options.
"""
plist
=
map
(
lambda
a
:
a
.
strip
(),
line
.
split
(
';'
))
key
=
plist
[
0
]
.
lower
()
del
plist
[
0
]
pdict
=
{}
for
p
in
plist
:
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
]
pdict
[
name
]
=
value
return
key
,
pdict
def
apply_fs_data
(
object
,
fs
,
**
args
):
"""
Apply FieldStorage data to an object - the object must be
callable. Examine the args, and match then with fs data,
then call the object, return the result.
"""
# we need to weed out unexpected keyword arguments
# and for that we need to get a list of them. There
# are a few options for callable objects here:
fc
=
None
expected
=
[]
if
hasattr
(
object
,
"func_code"
):
# function
fc
=
object
.
func_code
expected
=
fc
.
co_varnames
[
0
:
fc
.
co_argcount
]
elif
hasattr
(
object
,
'im_func'
):
# method
fc
=
object
.
im_func
.
func_code
expected
=
fc
.
co_varnames
[
1
:
fc
.
co_argcount
]
elif
type
(
object
)
in
(
TypeType
,
ClassType
):
# class
fc
=
object
.
__init__
.
im_func
.
func_code
expected
=
fc
.
co_varnames
[
1
:
fc
.
co_argcount
]
elif
type
(
object
)
is
BuiltinFunctionType
:
# builtin
fc
=
None
expected
=
[]
elif
hasattr
(
object
,
'__call__'
):
# callable object
if
type
(
object
.
__call__
)
is
MethodType
:
fc
=
object
.
__call__
.
im_func
.
func_code
expected
=
fc
.
co_varnames
[
1
:
fc
.
co_argcount
]
else
:
# abuse of objects to create hierarchy
return
apply_fs_data
(
object
.
__call__
,
fs
,
**
args
)
# add form data to args
for
field
in
fs
.
list
:
if
field
.
filename
:
val
=
field
else
:
val
=
field
.
value
args
.
setdefault
(
field
.
name
,
[])
.
append
(
val
)
# replace lists with single values
for
arg
in
args
:
if
((
type
(
args
[
arg
])
is
ListType
)
and
(
len
(
args
[
arg
])
==
1
)):
args
[
arg
]
=
args
[
arg
][
0
]
# remove unexpected args unless co_flags & 0x08,
# meaning function accepts **kw syntax
if
fc
is
None
:
args
=
{}
elif
not
(
fc
.
co_flags
&
0x08
):
for
name
in
args
.
keys
():
if
name
not
in
expected
:
del
args
[
name
]
return
object
(
**
args
)
RE_CDISPOSITION_FILENAME
=
re
.
compile
(
r'filename=(?P<filename>[\w\.]*)'
)
def
handle_file_post
(
req
,
allowed_mimetypes
=
None
):
"""
Handle the POST of a file.
@return: the a tuple with the full path to the file saved on disk,
and it's mimetype as provided by the request.
@rtype: (string, string)
"""
from
invenio.legacy.bibdocfile.api
import
decompose_file
,
md5
## We retrieve the length
clen
=
req
.
headers_in
[
"Content-Length"
]
if
clen
is
None
:
raise
InvenioWebInterfaceWSGIContentLenghtError
(
"Content-Length header is missing"
)
try
:
clen
=
int
(
clen
)
assert
(
clen
>
1
)
except
(
ValueError
,
AssertionError
):
raise
InvenioWebInterfaceWSGIContentLenghtError
(
"Content-Length header should contain a positive integer"
)
## Let's take the content type
ctype
=
req
.
headers_in
[
"Content-Type"
]
if
allowed_mimetypes
and
ctype
not
in
allowed_mimetypes
:
raise
InvenioWebInterfaceWSGIContentTypeError
(
"Content-Type not in allowed list of content types:
%s
"
%
allowed_mimetypes
)
## Let's optionally accept a suggested filename
suffix
=
prefix
=
''
g
=
RE_CDISPOSITION_FILENAME
.
search
(
req
.
headers_in
.
get
(
"Content-Disposition"
,
""
))
if
g
:
dummy
,
prefix
,
suffix
=
decompose_file
(
g
.
group
(
"filename"
))
## Let's optionally accept an MD5 hash (and use it later for comparison)
cmd5
=
req
.
headers_in
.
get
(
"Content-MD5"
)
if
cmd5
:
the_md5
=
md5
()
## Ok. We can initialize the file
fd
,
path
=
tempfile
.
mkstemp
(
suffix
=
suffix
,
prefix
=
prefix
,
dir
=
CFG_TMPDIR
)
the_file
=
os
.
fdopen
(
fd
,
'w'
)
## Let's read the file
while
True
:
chunk
=
req
.
read
(
min
(
10240
,
clen
))
if
len
(
chunk
)
<
min
(
10240
,
clen
):
## We expected to read at least clen (which is different than 0)
## but chunk was shorter! Gosh! Error! Panic!
the_file
.
close
()
os
.
close
(
fd
)
os
.
remove
(
path
)
raise
InvenioWebInterfaceWSGIContentLenghtError
(
"File shorter than what specified in Content-Length"
)
if
cmd5
:
## MD5 was in the header let's compute it
the_md5
.
update
(
chunk
)
## And let's definitively write the content to disk :-)
the_file
.
write
(
chunk
)
clen
-=
len
(
chunk
)
if
clen
==
0
:
## That's it. Everything was read.
break
if
cmd5
and
the_md5
.
hexdigest
()
.
lower
()
!=
cmd5
.
strip
()
.
lower
():
## Let's check the MD5
the_file
.
close
()
os
.
close
(
fd
)
os
.
remove
(
path
)
raise
InvenioWebInterfaceWSGIContentMD5Error
(
"MD5 checksum does not match"
)
## Let's clean everything up
the_file
.
close
()
return
(
path
,
ctype
)
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