29
from ivle.config import Config
28
30
from ivle.webapp.base.views import BaseView
29
31
from ivle.webapp.base.plugins import PublicViewPlugin, ViewPlugin, MediaPlugin
30
32
from ivle.webapp.errors import NotFound, Forbidden
31
from ivle.webapp.publisher import INF
32
from ivle.webapp import ApplicationRoot
34
# This maps a media namespace to an external dependency directory (in this
35
# case specified by the configuration option media/externals/jquery) and a
36
# list of permitted subpaths.
37
EXTERNAL_MEDIA_MAP = {'jquery': ('jquery', ['jquery.js'])}
39
34
def media_url(req, plugin, path):
40
35
'''Generates a URL to a media file.
48
43
if not isinstance(plugin, basestring):
49
44
plugin = req.config.reverse_plugins[plugin]
51
media_path = os.path.join('+media', '+' + req.config['media']['version']) \
52
if req.config['media']['version'] else '+media'
54
return req.make_path(os.path.join(media_path, plugin, path))
56
class MediaFile(object):
57
def __init__(self, root, external, version, ns, path):
59
self.external = external
60
self.version = version
48
media_path = os.path.join('+media', '+' + config['media']['version']) if \
49
config['media']['version'] else '+media'
51
return os.path.join(ivle.conf.root_dir, media_path, plugin, path)
53
class BaseMediaFileView(BaseView):
54
'''A view for media files.
56
This serves static files from directories registered by plugins.
58
Plugins wishing to export media should declare a 'media' attribute,
59
pointing to the directory to serve (relative to the module's directory).
60
The contents of that directory will then be available under
61
/+media/python.path.to.module.
63
def __init__(self, req, ns, path):
68
extern = EXTERNAL_MEDIA_MAP[self.ns]
72
# Unless it's a whitelisted path, we don't want to hear about it.
73
if self.path not in extern[1]:
76
# Grab the admin-configured path for this particular external dep.
77
externdir = self.root.config['media']['externals'][extern[0]]
79
assert isinstance(externdir, basestring)
81
return os.path.join(externdir, self.path)
84
plugin = self.root.config.plugins[self.ns]
88
if not issubclass(plugin, MediaPlugin):
91
mediadir = plugin.media
92
plugindir = os.path.dirname(inspect.getmodule(plugin).__file__)
94
return os.path.join(plugindir, mediadir, self.path)
96
class MediaFileView(BaseView):
67
def _make_filename(self, req):
68
raise NotImplementedError()
99
70
def render(self, req):
100
71
# If it begins with ".." or separator, it's illegal. Die.
101
if self.context.path.startswith("..") or \
102
self.context.path.startswith('/'):
72
if self.path.startswith("..") or self.path.startswith('/'):
105
filename = self.get_filename(req)
75
filename = self._make_filename(req)
109
77
# Find an appropriate MIME type.
110
78
(type, _) = mimetypes.guess_type(filename)
117
85
if not os.access(filename, os.R_OK) or os.path.isdir(filename):
120
if self.context.version is not None:
121
req.headers_out['Expires'] = email.utils.formatdate(
122
timeval=time.time() + (60*60*24*365),
127
88
req.content_type = type
128
89
req.sendfile(filename)
130
def get_filename(self, req):
131
return self.context.filename
92
class MediaFileView(BaseMediaFileView):
93
'''A view for media files.
95
This serves static files from directories registered by plugins.
97
Plugins wishing to export media should declare a 'media' attribute,
98
pointing to the directory to serve (relative to the module's directory).
99
The contents of that directory will then be available under
100
/+media/python.path.to.module.
104
def _make_filename(self, req):
106
plugin = req.config.plugins[self.ns]
110
if not issubclass(plugin, MediaPlugin):
113
mediadir = plugin.media
114
plugindir = os.path.dirname(inspect.getmodule(plugin).__file__)
116
return os.path.join(plugindir, mediadir, self.path)
133
118
def get_permissions(self, user):
136
def root_to_media(root, *segments):
137
if segments[0].startswith('+'):
138
if segments[0] == '+external':
143
version = segments[0][1:]
144
if segments[1] == '+external':
155
if version is not None and version != root.config['media']['version']:
159
path = os.path.normpath(os.path.join(*path[1:]))
161
return MediaFile(root, external, version, ns, path)
121
class VersionedMediaFileView(MediaFileView):
122
'''A view for versioned media files, with aggressive caching.
124
This serves static media files with a version string, and requests that
125
browsers cache them for a long time.
128
def __init__(self, req, ns, path, version):
129
super(VersionedMediaFileView, self).__init__(req, ns, path)
130
self.version = version
132
def _make_filename(self, req):
133
if self.version != Config()['media']['version']:
136
# Don't expire for a year.
137
req.headers_out['Expires'] = email.utils.formatdate(
138
timeval=time.time() + (60*60*24*365),
141
return super(VersionedMediaFileView, self)._make_filename(req)
163
143
class Plugin(ViewPlugin, PublicViewPlugin):
164
forward_routes = [(ApplicationRoot, '+media', root_to_media, INF)]
165
views = [(MediaFile, '+index', MediaFileView)]
166
public_forward_routes = forward_routes
145
('+media/+:version/:ns/*path', VersionedMediaFileView),
146
('+media/:ns/*path', MediaFileView),