/lib/galaxy/web/framework/middleware/static.py

 1import os
 2import sys
 3import imp
 4import pkg_resources
 5import mimetypes
 6from paste import request
 7from paste import fileapp
 8from paste.util import import_string
 9from paste.deploy import converters
10from paste import httpexceptions
11from paste.httpheaders import ETAG
12
13from paste.urlparser import StaticURLParser
14
15class CacheableStaticURLParser( StaticURLParser ):
16    def __init__( self, directory, cache_seconds=None ):
17        StaticURLParser.__init__( self, directory )
18        self.cache_seconds = cache_seconds
19    def __call__( self, environ, start_response ):
20        path_info = environ.get('PATH_INFO', '')
21        if not path_info:
22            return self.add_slash(environ, start_response)
23        if path_info == '/':
24            # @@: This should obviously be configurable
25            filename = 'index.html'
26        else:
27            filename = request.path_info_pop(environ)
28        full = os.path.join(self.directory, filename)
29        if not os.path.exists(full):
30            return self.not_found(environ, start_response)
31        if os.path.isdir(full):
32            # @@: Cache?
33            return self.__class__(full)(environ, start_response)
34        if environ.get('PATH_INFO') and environ.get('PATH_INFO') != '/':
35            return self.error_extra_path(environ, start_response)
36        if_none_match = environ.get('HTTP_IF_NONE_MATCH')
37        if if_none_match:
38            mytime = os.stat(full).st_mtime
39            if str(mytime) == if_none_match:
40                headers = []
41                ETAG.update(headers, mytime)
42                start_response('304 Not Modified',headers)
43                return [''] # empty body
44        app = fileapp.FileApp(full)
45        if self.cache_seconds:
46            app.cache_control( max_age = int( self.cache_seconds ) )
47        return app(environ, start_response)
48        
49def make_static( global_conf, document_root, cache_seconds=None ):
50    return CacheableStaticURLParser( document_root, cache_seconds )