def retrieveFileStreamIterator(self, filename, REQUEST=None):
threshold = 2 << 16 # 128 kb
local_filename = self.targetFile(filename)
try:
fsize = os.path.getsize(local_filename)
except:
fsize = 0
raise NotFound
if fsize < threshold or REQUEST.RESPONSE is None:
try:
f = open(local_filename, 'rb')
data = f.read()
finally:
f.close()
else:
data = filestream_iterator(local_filename, 'rb')
try:
mt, enc = standard.guess_content_type(local_filename, data)
except:
mt, enc = 'content/unknown', ''
# Remove timestamp from filename.
filename = filename[:filename.rfind('_')] + filename[filename.rfind('.'
):]
standard.set_response_headers(filename, mt, fsize, REQUEST)
return data
def __call__(self, REQUEST=None, **kw):
""""""
if REQUEST is not None and 'path_to_handle' in REQUEST:
REQUEST['path_to_handle'] = []
RESPONSE = REQUEST.RESPONSE
parent = self.aq_parent
access = parent.hasAccess(REQUEST) or parent.getConfProperty(
'ZMS.blobfields.grant_public_access', 0) == 1
# Hook for custom access rules: return True/False, return 404 (Forbidden) if you want to perform redirect
if access:
# @deprecated
# @TODO log deprecation warning
try:
name = 'hasCustomAccess'
if hasattr(parent, name):
v = zopeutil.callObject(getattr(parent, name), parent)
if type(v) is bool:
access = access and v
elif type(v) is int and v == 404:
return ''
except:
standard.writeError(parent, '[__call__]: can\'t %s' % name)
# Raise unauthorized error.
else:
RESPONSE.setHeader('Expires', '-1')
RESPONSE.setHeader('Cache-Control', 'no-cache')
RESPONSE.setHeader('Pragma', 'no-cache')
raise zExceptions.Unauthorized
# Set custom response-headers:
# - explicit Last-Modified
# - explicit Content-Disposition and Content-Type
# - addtional Content-Disposition via ZMS_ADDITIONAL_CONTENT_DISPOSITION
try:
name = 'getCustomBlobResponseHeaders'
if hasattr(parent, name):
zopeutil.callObject(getattr(parent, name), parent)
except:
standard.writeError(parent, '[__call__]: can\'t %s' % name)
if not RESPONSE.getHeader(
'Last-Modified'
) and self._if_modified_since_request_handler(REQUEST, RESPONSE):
# we were able to handle this by returning a 304 (not modified)
# unfortunately, because the HTTP cache manager uses the cache
# API, and because 304 (not modified) responses are required to carry the Expires
# header for HTTP/1.1, we need to call ZCacheable_set here.
# This is nonsensical for caches other than the HTTP cache manager
# unfortunately.
self.ZCacheable_set(None)
return ''
if isinstance(self, MyImage) and self._range_request_handler(
REQUEST, RESPONSE):
# we served a chunk of content in response to a range request.
return ''
# If blob-object came from call of py-attribute by path-handler check content-disposition and content-type.
if not (RESPONSE.getHeader('Content-Disposition')
and RESPONSE.getHeader('Content-Type')):
standard.set_response_headers(self.getFilename(),
self.getContentType(),
self.get_size(), REQUEST)
if not (RESPONSE.getHeader('Last-Modified')):
RESPONSE.setHeader('Last-Modified',
rfc1123_date(parent._p_mtime))
# Cacheable.
cacheable = not REQUEST.get('preview') == 'preview'
if cacheable:
cacheable = parent.hasPublicAccess()
if not cacheable:
RESPONSE.setHeader('Expires', '-1')
RESPONSE.setHeader('Cache-Control', 'no-cache')
# IE6 SSL Download bug:
# http://support.microsoft.com/kb/812935/en-us
# http://support.microsoft.com/kb/323308/en-us
if not REQUEST.get('URL', '').startswith('https://'):
RESPONSE.setHeader('Pragma', 'no-cache')
if self.ZCacheable_isCachingEnabled():
result = self.ZCacheable_get(default=None)
if result is not None:
# We will always get None from RAMCacheManager and HTTP
# Accelerated Cache Manager but we will get
# something implementing the IStreamIterator interface
# from a "FileCacheManager"
return result
self.ZCacheable_set(None)
mediadb = parent.getMediaDb()
if mediadb is not None:
mediadbfile = self.getMediadbfile()
if mediadbfile is not None:
return mediadb.retrieveFileStreamIterator(
mediadbfile, REQUEST)
RESPONSE.setBase(None)
return self.getData()
return self