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
|
# lookup.py
# Copyright (C) 2006, 2007, 2008 Michael Bayer mike_mp@zzzcomputing.com
#
# This module is part of Mako and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php
import os, stat, posixpath, re
from mako import exceptions, util
from mako.template import Template
try:
import threading
except:
import dummy_threading as threading
class TemplateCollection(object):
def has_template(self, uri):
try:
self.get_template(uri)
return True
except exceptions.TemplateLookupException, e:
return False
def get_template(self, uri, relativeto=None):
raise NotImplementedError()
def filename_to_uri(self, uri, filename):
"""convert the given filename to a uri relative to this TemplateCollection."""
return uri
def adjust_uri(self, uri, filename):
"""adjust the given uri based on the calling filename.
when this method is called from the runtime, the 'filename' parameter
is taken directly to the 'filename' attribute of the calling
template. Therefore a custom TemplateCollection subclass can place any string
identifier desired in the "filename" parameter of the Template objects it constructs
and have them come back here."""
return uri
class TemplateLookup(TemplateCollection):
def __init__(self, directories=None, module_directory=None, filesystem_checks=True, collection_size=-1, format_exceptions=False,
error_handler=None, output_encoding=None, encoding_errors='strict', cache_type=None, cache_dir=None, cache_url=None,
modulename_callable=None, default_filters=['unicode'], buffer_filters=[], imports=None, input_encoding=None, preprocessor=None):
if isinstance(directories, basestring):
directories = [directories]
self.directories = [posixpath.normpath(d) for d in directories or []]
self.module_directory = module_directory
self.modulename_callable = modulename_callable
self.filesystem_checks = filesystem_checks
self.collection_size = collection_size
self.template_args = {'format_exceptions':format_exceptions, 'error_handler':error_handler, 'output_encoding':output_encoding, 'encoding_errors':encoding_errors, 'input_encoding':input_encoding, 'module_directory':module_directory, 'cache_type':cache_type, 'cache_dir':cache_dir or module_directory, 'cache_url':cache_url, 'default_filters':default_filters, 'buffer_filters':buffer_filters, 'imports':imports, 'preprocessor':preprocessor}
if collection_size == -1:
self.__collection = {}
self._uri_cache = {}
else:
self.__collection = util.LRUCache(collection_size)
self._uri_cache = util.LRUCache(collection_size)
self._mutex = threading.Lock()
def get_template(self, uri):
try:
if self.filesystem_checks:
return self.__check(uri, self.__collection[uri])
else:
return self.__collection[uri]
except KeyError:
u = re.sub(r'^\/+', '', uri)
for dir in self.directories:
srcfile = posixpath.normpath(posixpath.join(dir, u))
if os.access(srcfile, os.F_OK):
return self.__load(srcfile, uri)
else:
raise exceptions.TopLevelLookupException("Cant locate template for uri '%s'" % uri)
def adjust_uri(self, uri, relativeto):
"""adjust the given uri based on the calling filename."""
if uri[0] != '/':
if relativeto is not None:
return posixpath.join(posixpath.dirname(relativeto), uri)
else:
return '/' + uri
else:
return uri
def filename_to_uri(self, filename):
try:
return self._uri_cache[filename]
except KeyError:
value = self.__relativeize(filename)
self._uri_cache[filename] = value
return value
def __relativeize(self, filename):
"""return the portion of a filename that is 'relative' to the directories in this lookup."""
filename = posixpath.normpath(filename)
for dir in self.directories:
if filename[0:len(dir)] == dir:
return filename[len(dir):]
else:
return None
def __load(self, filename, uri):
self._mutex.acquire()
try:
try:
# try returning from collection one more time in case concurrent thread already loaded
return self.__collection[uri]
except KeyError:
pass
try:
self.__collection[uri] = Template(uri=uri, filename=posixpath.normpath(filename), lookup=self, module_filename=(self.modulename_callable is not None and self.modulename_callable(filename, uri) or None), **self.template_args)
return self.__collection[uri]
except:
self.__collection.pop(uri, None)
raise
finally:
self._mutex.release()
def __check(self, uri, template):
if template.filename is None:
return template
if not os.access(template.filename, os.F_OK):
self.__collection.pop(uri, None)
raise exceptions.TemplateLookupException("Cant locate template for uri '%s'" % uri)
elif template.module._modified_time < os.stat(template.filename)[stat.ST_MTIME]:
self.__collection.pop(uri, None)
return self.__load(template.filename, uri)
else:
return template
def put_string(self, uri, text):
self.__collection[uri] = Template(text, lookup=self, uri=uri, **self.template_args)
def put_template(self, uri, template):
self.__collection[uri] = template
|
