1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
# This program is free software; you can redistribute it and/or modify
# it under the terms of the (LGPL) GNU Lesser General Public License as
# published by the Free Software Foundation; either version 3 of the
# License, or (at your option) any later version.
#
# This program 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 Library Lesser General Public License for more details at
# ( http://www.gnu.org/licenses/lgpl.html ).
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# written by: Jeff Ortel ( jortel@redhat.com )
"""
Contains xml document reader classes.
"""
from suds.sax.parser import Parser
from suds.transport import Request
from suds.store import DocumentStore
from logging import getLogger
log = getLogger(__name__)
class ObjectId(object):
def __init__(self, name, suffix):
self.name = name
self.suffix = suffix
class DocumentReader:
"""
The XML document reader provides an integration
between the SAX L{Parser} and the document cache.
@cvar suffix: The cache file suffix.
@type suffix: str
@ivar options: An options object.
@type options: I{Options}
"""
suffix = 'pxd'
def __init__(self, options):
"""
@param options: An options object.
@type options: I{Options}
"""
self.options = options
def open(self, url):
"""
Open an XML document at the specified I{url}.
First, the document attempted to be retrieved from
the I{object cache}. If not found, it is downloaded and
parsed using the SAX parser. The result is added to the
cache for the next open().
@param url: A document url.
@type url: str.
@return: The specified XML document.
@rtype: I{Document}
"""
id = ObjectId(url, self.suffix)
cache = self.options.cache
d = cache.get(id)
if d is None:
d = self.download(url)
cache.put(id, d)
return d
def download(self, url):
"""
Download the docuemnt.
@param url: A document url.
@type url: str.
@return: A file pointer to the docuemnt.
@rtype: file-like
"""
store = DocumentStore()
fp = store.open(url)
if fp is None:
fp = self.options.transport.open(Request(url))
sax = Parser()
return sax.parse(file=fp)
class DefinitionsReader:
"""
The WSDL definitions reader provides an integration
between the Definitions and the object cache.
@cvar suffix: The cache file suffix.
@type suffix: str
@ivar options: An options object.
@type options: I{Options}
@ivar fn: A factory function (constructor) used to
create the object not found in the cache.
@type fn: I{Constructor}
"""
suffix = 'pw'
def __init__(self, options, fn):
"""
@param options: An options object.
@type options: I{Options}
@param fn: A factory function (constructor) used to
create the object not found in the cache.
@type fn: I{Constructor}
"""
self.options = options
self.fn = fn
def open(self, url):
"""
Open a WSDL at the specified I{url}.
First, the WSDL attempted to be retrieved from
the I{object cache}. After unpickled from the cache, the
I{options} attribute is restored.
If not found, it is downloaded and instantiated using the
I{fn} constructor and added to the cache for the next open().
@param url: A WSDL url.
@type url: str.
@return: The WSDL object.
@rtype: I{Definitions}
"""
id = ObjectId(url, self.suffix)
cache = self.options.cache
d = cache.get(id)
if d is None:
d = self.fn(url, self.options)
cache.put(id, d)
else:
d.options = self.options
for imp in d.imports:
imp.imported.options = self.options
return d
|
