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
|
"""
Static file sending application
"""
import os, time
import mimetypes
import httpexceptions
from response import has_header, remove_header
from rfc822 import formatdate
CACHE_SIZE = 4096
BLOCK_SIZE = 4096
class DataApp(object):
"""
Returns an application that will send the data provided.
Constructor Arguments:
``content`` the content being sent to the client
``headers`` set of static headers to send /w response
- may contain ``content-type`` override
- must not contain ``content-length``
``mimetype`` if set, this is the mimetype of the content
``expires`` if this is set, is the number of seconds
from the time of the request that the file
is marked to expire
"""
def __init__(self, content, headers=None, expires=None, mimetype=None):
self.content = None
self.headers = headers or []
self.expires = expires
if not has_header(self.headers,'content-type'):
if not mimetype:
mimetype = 'application/octet-stream'
self.headers.append(('content-type', mimetype))
if content:
self.set_content(content)
def set_content(self, content):
self.content = [content]
remove_header(self.headers,'content-length')
self.headers.append(('content-length',str(len(content))))
def __call__(self, environ, start_response):
headers = self.headers
if self.expires:
headers = headers[:] # copy this array so we can add
headers.append(('Expires',formatdate(time.time()+self.expires)))
start_response('200 OK',headers)
return self.content
class FileApp(DataApp):
"""
Returns an application that will send the file at the given
filename. Adds a mime type based on ``mimetypes.guess_type()``.
"""
# @@: Should test things like last-modified, if-modified-since,
# etc.
def __init__(self, filename, **kwargs):
self.filename = filename
self.st_mtime = 0
if 'mimetype' not in kwargs:
mimetype, encoding = mimetypes.guess_type(self.filename)
# @@: I don't know what to do with the encoding.
if not mimetype:
mimetype = 'application/octet-stream'
kwargs['mimetype'] = mimetype
DataApp.__init__(self, None, **kwargs)
def update(self):
stat = os.stat(self.filename)
if stat.st_mtime == self.st_mtime:
return
self.st_mtime = stat.st_mtime
if stat.st_size < CACHE_SIZE:
fh = open(self.filename,"rb")
self.set_content(fh.read())
fh.close()
return
self.content = None
remove_header(self.headers,'content-length')
self.headers.append(('content-length',stat.st_size))
def __call__(self, environ, start_response):
self.update()
if self.content:
return DataApp.__call__(self, environ, start_response)
try:
file = open(self.filename, 'rb')
except (IOError, OSError), e:
exc = httpexceptions.HTTPForbidden(
'You are not permitted to view this file (%s)' % e)
return exc.wsgi_application(
environ, start_response)
DataApp.__call__(self, environ, start_response)
return _FileIter(file)
class _FileIter:
def __init__(self, fp, blocksize=BLOCK_SIZE):
self.file = fp
self.blocksize = blocksize
def __iter__(self):
return self
def next(self):
data = self.file.read(self.blocksize)
if not data:
raise StopIteration
return data
def close(self):
self.file.close()
|
