def _range_request_handler(self, REQUEST, RESPONSE):
# HTTP Range header handling: return True if we've served a range
# chunk out of our data.
range = REQUEST.get_header("Range", None)
request_range = REQUEST.get_header("Request-Range", None)
if request_range is not None:
# Netscape 2 through 4 and MSIE 3 implement a draft version
# Later on, we need to serve a different mime-type as well.
range = request_range
if_range = REQUEST.get_header("If-Range", None)
if range is not None:
ranges = HTTPRangeSupport.parseRange(range)
if if_range is not None:
# Only send ranges if the data isn't modified, otherwise send
# the whole object. Support both ETags and Last-Modified dates!
if len(if_range) > 1 and if_range[:2] == "ts":
# ETag:
if if_range != self.http__etag():
# Modified, so send a normal response. We delete
# the ranges, which causes us to skip to the 200
# response.
ranges = None
else:
# Date
date = if_range.split(";")[0]
try:
mod_since = long(DateTime(date).timeTime())
except:
mod_since = None
if mod_since is not None:
if self._p_mtime:
last_mod = long(self._p_mtime)
else:
last_mod = long(0)
if last_mod > mod_since:
# Modified, so send a normal response. We delete
# the ranges, which causes us to skip to the 200
# response.
ranges = None
if ranges:
# Search for satisfiable ranges.
satisfiable = 0
for start, end in ranges:
if start < self.size:
satisfiable = 1
break
if not satisfiable:
RESPONSE.setHeader("Content-Range", "bytes */%d" % self.size)
RESPONSE.setHeader("Accept-Ranges", "bytes")
RESPONSE.setHeader("Last-Modified", rfc1123_date(self._p_mtime))
RESPONSE.setHeader("Content-Type", self.content_type)
RESPONSE.setHeader("Content-Length", self.size)
RESPONSE.setStatus(416)
return True
ranges = HTTPRangeSupport.expandRanges(ranges, self.size)
if len(ranges) == 1:
# Easy case, set extra header and return partial set.
start, end = ranges[0]
size = end - start
RESPONSE.setHeader("Last-Modified", rfc1123_date(self._p_mtime))
RESPONSE.setHeader("Content-Type", self.content_type)
RESPONSE.setHeader("Content-Length", size)
RESPONSE.setHeader("Accept-Ranges", "bytes")
RESPONSE.setHeader("Content-Range", "bytes %d-%d/%d" % (start, end - 1, self.size))
RESPONSE.setStatus(206) # Partial content
data = self.data
if isinstance(data, str):
RESPONSE.write(data[start:end])
return True
# Linked Pdata objects. Urgh.
pos = 0
while data is not None:
l = len(data.data)
pos = pos + l
if pos > start:
# We are within the range
lstart = l - (pos - start)
if lstart < 0:
lstart = 0
# find the endpoint
if end <= pos:
lend = l - (pos - end)
# Send and end transmission
RESPONSE.write(data[lstart:lend])
break
# Not yet at the end, transmit what we have.
RESPONSE.write(data[lstart:])
data = data.next
return True
else:
boundary = choose_boundary()
# Calculate the content length
size = (
8
+ len(boundary)
+ len(ranges) # End marker length
* ( # Constant lenght per set
49 + len(boundary) + len(self.content_type) + len("%d" % self.size)
)
)
for start, end in ranges:
# Variable length per set
size = size + len("%d%d" % (start, end - 1)) + end - start
# Some clients implement an earlier draft of the spec, they
# will only accept x-byteranges.
draftprefix = (request_range is not None) and "x-" or ""
RESPONSE.setHeader("Content-Length", size)
RESPONSE.setHeader("Accept-Ranges", "bytes")
RESPONSE.setHeader("Last-Modified", rfc1123_date(self._p_mtime))
RESPONSE.setHeader("Content-Type", "multipart/%sbyteranges; boundary=%s" % (draftprefix, boundary))
RESPONSE.setStatus(206) # Partial content
data = self.data
# The Pdata map allows us to jump into the Pdata chain
# arbitrarily during out-of-order range searching.
pdata_map = {}
pdata_map[0] = data
for start, end in ranges:
RESPONSE.write("\r\n--%s\r\n" % boundary)
RESPONSE.write("Content-Type: %s\r\n" % self.content_type)
RESPONSE.write("Content-Range: bytes %d-%d/%d\r\n\r\n" % (start, end - 1, self.size))
if isinstance(data, str):
RESPONSE.write(data[start:end])
else:
# Yippee. Linked Pdata objects. The following
# calculations allow us to fast-forward through the
# Pdata chain without a lot of dereferencing if we
# did the work already.
first_size = len(pdata_map[0].data)
if start < first_size:
closest_pos = 0
else:
closest_pos = ((start - first_size) >> 16 << 16) + first_size
pos = min(closest_pos, max(pdata_map.keys()))
data = pdata_map[pos]
while data is not None:
l = len(data.data)
pos = pos + l
if pos > start:
# We are within the range
lstart = l - (pos - start)
if lstart < 0:
lstart = 0
# find the endpoint
if end <= pos:
lend = l - (pos - end)
# Send and loop to next range
RESPONSE.write(data[lstart:lend])
break
# Not yet at the end, transmit what we have.
RESPONSE.write(data[lstart:])
data = data.next
# Store a reference to a Pdata chain link so we
# don't have to deref during this request again.
pdata_map[pos] = data
# Do not keep the link references around.
del pdata_map
RESPONSE.write("\r\n--%s--\r\n" % boundary)
return True
def _range_request_handler(self, REQUEST, RESPONSE):
# HTTP Range header handling: return True if we've served a range
# chunk out of our data.
range = REQUEST.get_header('Range', None)
request_range = REQUEST.get_header('Request-Range', None)
if request_range is not None:
# Netscape 2 through 4 and MSIE 3 implement a draft version
# Later on, we need to serve a different mime-type as well.
range = request_range
if_range = REQUEST.get_header('If-Range', None)
if range is not None:
ranges = HTTPRangeSupport.parseRange(range)
if if_range is not None:
# Only send ranges if the data isn't modified, otherwise send
# the whole object. Support both ETags and Last-Modified dates!
if len(if_range) > 1 and if_range[:2] == 'ts':
# ETag:
if if_range != self.http__etag():
# Modified, so send a normal response. We delete
# the ranges, which causes us to skip to the 200
# response.
ranges = None
else:
# Date
date = if_range.split(';')[0]
try:
mod_since = long(DateTime(date).timeTime())
except:
mod_since = None
if mod_since is not None:
if self._p_mtime:
last_mod = long(self._p_mtime)
else:
last_mod = long(0)
if last_mod > mod_since:
# Modified, so send a normal response. We delete
# the ranges, which causes us to skip to the 200
# response.
ranges = None
if ranges:
# Search for satisfiable ranges.
satisfiable = 0
for start, end in ranges:
if start < self.size:
satisfiable = 1
break
if not satisfiable:
RESPONSE.setHeader('Content-Range',
'bytes */%d' % self.size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Last-Modified',
rfc1123_date(self._p_mtime))
RESPONSE.setHeader('Content-Type', self.content_type)
RESPONSE.setHeader('Content-Length', self.size)
RESPONSE.setStatus(416)
return True
ranges = HTTPRangeSupport.expandRanges(ranges, self.size)
if len(ranges) == 1:
# Easy case, set extra header and return partial set.
start, end = ranges[0]
size = end - start
RESPONSE.setHeader('Last-Modified',
rfc1123_date(self._p_mtime))
RESPONSE.setHeader('Content-Type', self.content_type)
RESPONSE.setHeader('Content-Length', size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader(
'Content-Range',
'bytes %d-%d/%d' % (start, end - 1, self.size))
RESPONSE.setStatus(206) # Partial content
data = self.data
if isinstance(data, str):
RESPONSE.write(data[start:end])
return True
# Linked Pdata objects. Urgh.
pos = 0
while data is not None:
l = len(data.data)
pos = pos + l
if pos > start:
# We are within the range
lstart = l - (pos - start)
if lstart < 0: lstart = 0
# find the endpoint
if end <= pos:
lend = l - (pos - end)
# Send and end transmission
RESPONSE.write(data[lstart:lend])
break
# Not yet at the end, transmit what we have.
RESPONSE.write(data[lstart:])
data = data.next
return True
else:
boundary = choose_boundary()
# Calculate the content length
size = (
8 + len(boundary) + # End marker length
len(ranges) * ( # Constant lenght per set
49 + len(boundary) + len(self.content_type) +
len('%d' % self.size)))
for start, end in ranges:
# Variable length per set
size = (size + len('%d%d' % (start, end - 1)) + end -
start)
# Some clients implement an earlier draft of the spec, they
# will only accept x-byteranges.
draftprefix = (request_range is not None) and 'x-' or ''
RESPONSE.setHeader('Content-Length', size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Last-Modified',
rfc1123_date(self._p_mtime))
RESPONSE.setHeader(
'Content-Type', 'multipart/%sbyteranges; boundary=%s' %
(draftprefix, boundary))
RESPONSE.setStatus(206) # Partial content
data = self.data
# The Pdata map allows us to jump into the Pdata chain
# arbitrarily during out-of-order range searching.
pdata_map = {}
pdata_map[0] = data
for start, end in ranges:
RESPONSE.write('\r\n--%s\r\n' % boundary)
RESPONSE.write('Content-Type: %s\r\n' %
self.content_type)
RESPONSE.write(
'Content-Range: bytes %d-%d/%d\r\n\r\n' %
(start, end - 1, self.size))
if isinstance(data, str):
RESPONSE.write(data[start:end])
else:
# Yippee. Linked Pdata objects. The following
# calculations allow us to fast-forward through the
# Pdata chain without a lot of dereferencing if we
# did the work already.
first_size = len(pdata_map[0].data)
if start < first_size:
closest_pos = 0
else:
closest_pos = ((
(start - first_size) >> 16 << 16) +
first_size)
pos = min(closest_pos, max(pdata_map.keys()))
data = pdata_map[pos]
while data is not None:
l = len(data.data)
pos = pos + l
if pos > start:
# We are within the range
lstart = l - (pos - start)
if lstart < 0: lstart = 0
# find the endpoint
if end <= pos:
lend = l - (pos - end)
# Send and loop to next range
RESPONSE.write(data[lstart:lend])
break
# Not yet at the end, transmit what we have.
RESPONSE.write(data[lstart:])
data = data.next
# Store a reference to a Pdata chain link so we
# don't have to deref during this request again.
pdata_map[pos] = data
# Do not keep the link references around.
del pdata_map
RESPONSE.write('\r\n--%s--\r\n' % boundary)
return True
def _range_request_handler(self, REQUEST, RESPONSE):
# HTTP Range header handling: return True if we've served a range
# chunk out of our data.
range = REQUEST.get_header('Range', None)
request_range = REQUEST.get_header('Request-Range', None)
if request_range is not None:
# Netscape 2 through 4 and MSIE 3 implement a draft version
# Later on, we need to serve a different mime-type as well.
range = request_range
if_range = REQUEST.get_header('If-Range', None)
if range is not None:
ranges = HTTPRangeSupport.parseRange(range)
data = self._baseGetData()
if if_range is not None:
# Only send ranges if the data isn't modified, otherwise send
# the whole object. Support both ETags and Last-Modified dates!
if len(if_range) > 1 and if_range[:2] == 'ts':
# ETag:
if if_range != self.http__etag():
# Modified, so send a normal response. We delete
# the ranges, which causes us to skip to the 200
# response.
ranges = None
else:
# Date
date = if_range.split( ';')[0]
try: mod_since=long(DateTime(date).timeTime())
except: mod_since=None
if mod_since is not None:
last_mod = self._data_mtime()
if last_mod is None:
last_mod = 0
last_mod = long(last_mod)
if last_mod > mod_since:
# Modified, so send a normal response. We delete
# the ranges, which causes us to skip to the 200
# response.
ranges = None
if ranges:
# Search for satisfiable ranges.
satisfiable = 0
for start, end in ranges:
if start < self.getSize():
satisfiable = 1
break
if not satisfiable:
RESPONSE.setHeader('Content-Range',
'bytes */%d' % self.getSize())
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Last-Modified', rfc1123_date(self._data_mtime()))
RESPONSE.setHeader('Content-Type', self.content_type)
RESPONSE.setHeader('Content-Length', self.getSize())
RESPONSE.setStatus(416)
return True
ranges = HTTPRangeSupport.expandRanges(ranges, self.getSize())
if len(ranges) == 1:
# Easy case, set extra header and return partial set.
start, end = ranges[0]
size = end - start
RESPONSE.setHeader('Last-Modified', rfc1123_date(self._data_mtime()))
RESPONSE.setHeader('Content-Type', self.content_type)
RESPONSE.setHeader('Content-Length', size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Content-Range',
'bytes %d-%d/%d' % (start, end - 1, self.getSize()))
RESPONSE.setStatus(206) # Partial content
# NOTE data cannot be None here (if it is - ranges are not satisfiable)
if isinstance(data, str):
RESPONSE.write(data[start:end])
return True
for chunk in data.iterate(start, end-start):
RESPONSE.write(chunk)
return True
else:
boundary = choose_boundary()
# Calculate the content length
size = (8 + len(boundary) + # End marker length
len(ranges) * ( # Constant lenght per set
49 + len(boundary) + len(self.content_type) +
len('%d' % self.getSize())))
for start, end in ranges:
# Variable length per set
size = (size + len('%d%d' % (start, end - 1)) +
end - start)
data = self._baseGetData()
# Some clients implement an earlier draft of the spec, they
# will only accept x-byteranges.
draftprefix = (request_range is not None) and 'x-' or ''
RESPONSE.setHeader('Content-Length', size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Last-Modified', rfc1123_date(self._data_mtime()))
RESPONSE.setHeader('Content-Type',
'multipart/%sbyteranges; boundary=%s' % (
draftprefix, boundary))
RESPONSE.setStatus(206) # Partial content
for start, end in ranges:
RESPONSE.write('\r\n--%s\r\n' % boundary)
RESPONSE.write('Content-Type: %s\r\n' %
self.content_type)
RESPONSE.write(
'Content-Range: bytes %d-%d/%d\r\n\r\n' % (
start, end - 1, self.getSize()))
# NOTE data cannot be None here (if it is - ranges are not satisfiable)
if isinstance(data, str):
RESPONSE.write(data[start:end])
else:
for chunk in data.iterate(start, end-start):
RESPONSE.write(chunk)
RESPONSE.write('\r\n--%s--\r\n' % boundary)
return True
def _range_request_handler(self, REQUEST, RESPONSE):
# HTTP Range header handling: return True if we've served a range
# chunk out of our data.
range_ = REQUEST.get_header('Range', None)
request_range = REQUEST.get_header('Request-Range', None)
if request_range is not None:
# Netscape 2 through 4 and MSIE 3 implement a draft version
# Later on, we need to serve a different mime-type as well.
range_ = request_range
if_range = REQUEST.get_header('If-Range', None)
if range_ is not None:
ranges = HTTPRangeSupport.parseRange(range_)
data = self._baseGetData()
if if_range is not None:
# Only send ranges if the data isn't modified, otherwise send
# the whole object. Support both ETags and Last-Modified dates!
if len(if_range) > 1 and if_range[:2] == 'ts':
# ETag:
if if_range != self.http__etag():
# Modified, so send a normal response. We delete
# the ranges, which causes us to skip to the 200
# response.
ranges = None
else:
# Date
date = if_range.split(';')[0]
try:
mod_since = long(DateTime(date).timeTime())
except Exception:
mod_since = None
if mod_since is not None:
last_mod = self._data_mtime()
if last_mod is None:
last_mod = 0
last_mod = long(last_mod)
if last_mod > mod_since:
# Modified, so send a normal response. We delete
# the ranges, which causes us to skip to the 200
# response.
ranges = None
if ranges:
# Search for satisfiable ranges.
satisfiable = 0
for start, end in ranges:
if start < self.getSize():
satisfiable = 1
break
if not satisfiable:
RESPONSE.setHeader('Content-Range',
'bytes */%d' % self.getSize())
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Last-Modified',
rfc1123_date(self._data_mtime()))
RESPONSE.setHeader('Content-Type', self.content_type)
RESPONSE.setHeader('Content-Length', self.getSize())
RESPONSE.setStatus(416)
return True
ranges = HTTPRangeSupport.expandRanges(ranges, self.getSize())
if len(ranges) == 1:
# Easy case, set extra header and return partial set.
start, end = ranges[0]
size = end - start
RESPONSE.setHeader('Last-Modified',
rfc1123_date(self._data_mtime()))
RESPONSE.setHeader('Content-Type', self.content_type)
RESPONSE.setHeader('Content-Length', size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader(
'Content-Range',
'bytes %d-%d/%d' % (start, end - 1, self.getSize()))
RESPONSE.setStatus(206) # Partial content
# NOTE data cannot be None here (if it is - ranges are not satisfiable)
if isinstance(data, str):
RESPONSE.write(data[start:end])
return True
for chunk in data.iterate(start, end - start):
RESPONSE.write(chunk)
return True
else:
boundary = choose_boundary()
# Calculate the content length
size = (
8 + len(boundary) + # End marker length
len(ranges) * ( # Constant lenght per set
49 + len(boundary) + len(self.content_type) +
len('%d' % self.getSize())))
for start, end in ranges:
# Variable length per set
size = (size + len('%d%d' % (start, end - 1)) + end -
start)
data = self._baseGetData()
# Some clients implement an earlier draft of the spec, they
# will only accept x-byteranges.
draftprefix = (request_range is not None) and 'x-' or ''
RESPONSE.setHeader('Content-Length', size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Last-Modified',
rfc1123_date(self._data_mtime()))
RESPONSE.setHeader(
'Content-Type', 'multipart/%sbyteranges; boundary=%s' %
(draftprefix, boundary))
RESPONSE.setStatus(206) # Partial content
for start, end in ranges:
RESPONSE.write('\r\n--%s\r\n' % boundary)
RESPONSE.write('Content-Type: %s\r\n' %
self.content_type)
RESPONSE.write(
'Content-Range: bytes %d-%d/%d\r\n\r\n' %
(start, end - 1, self.getSize()))
# NOTE data cannot be None here (if it is - ranges are not satisfiable)
if isinstance(data, str):
RESPONSE.write(data[start:end])
else:
for chunk in data.iterate(start, end - start):
RESPONSE.write(chunk)
RESPONSE.write('\r\n--%s--\r\n' % boundary)
return True
def index_html(self,
REQUEST,
RESPONSE,
format=_MARKER,
inline=_MARKER,
**kw):
"""XXXXXX"""
range = REQUEST.get_header('Range', None)
if range is None:
start = None
end = None
else:
ranges = HTTPRangeSupport.parseRange(range)
(start, end) = ranges[0]
if (format is _MARKER) and (not kw) and (range is None):
# conversion parameters is mandatory to download the converted content.
# By default allways return view action.
# for all WevDAV access return raw content.
return self.view()
if format is _MARKER:
format = None
web_cache_kw = kw.copy()
if format:
web_cache_kw['format'] = format
view = _ViewEmulator().__of__(self)
# If we have a conditional get, set status 304 and return
# no content
if _checkConditionalGET(view, web_cache_kw):
return ''
# call caching policy manager.
_setCacheHeaders(view, web_cache_kw)
if not self.checkConversionFormatPermission(format, **kw):
raise Forbidden('You are not allowed to get this document in this ' \
'format')
mime, data = self.convert(format, **kw)
total_length = len(data)
if end is None:
end = total_length
if start is not None:
data = data[start:end - 1]
RESPONSE.setHeader('Content-Length', len(data))
RESPONSE.setHeader('Content-Type', mime)
filename = self.getStandardFilename(format=format)
# workaround for IE's bug to download files over SSL
RESPONSE.setHeader('Pragma', '')
RESPONSE.setHeader('Content-Disposition',
'attachment; filename="%s"' % filename)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
if start is None:
RESPONSE.setStatus(200)
else:
RESPONSE.setHeader(
'Content-Range',
'bytes %s-%s/%s' % (start, end - 1, total_length))
RESPONSE.setStatus(206)
return str(data)
def index_html(self, REQUEST, RESPONSE):
"""
The default view of the contents of a File or Image.
Returns the contents of the file or image. Also, sets the
Content-Type HTTP header to the objects content type.
"""
# HTTP If-Modified-Since header handling.
header=REQUEST.get_header('If-Modified-Since', None)
if header is not None:
header=header.split( ';')[0]
# Some proxies seem to send invalid date strings for this
# header. If the date string is not valid, we ignore it
# rather than raise an error to be generally consistent
# with common servers such as Apache (which can usually
# understand the screwy date string as a lucky side effect
# of the way they parse it).
# This happens to be what RFC2616 tells us to do in the face of an
# invalid date.
try: mod_since=long(DateTime(header).timeTime())
except: mod_since=None
if mod_since is not None:
if self._p_mtime:
last_mod = long(self._p_mtime)
else:
last_mod = long(0)
if last_mod > 0 and last_mod <= mod_since:
# Set header values since apache caching will return Content-Length
# of 0 in response if size is not set here
RESPONSE.setHeader('Last-Modified', rfc1123_date(self._p_mtime))
RESPONSE.setHeader('Content-Type', self.content_type)
RESPONSE.setHeader('Content-Length', self.size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setStatus(304)
return ''
if self.precondition and hasattr(self,self.precondition):
# Grab whatever precondition was defined and then
# execute it. The precondition will raise an exception
# if something violates its terms.
c=getattr(self,self.precondition)
if hasattr(c,'isDocTemp') and c.isDocTemp:
c(REQUEST['PARENTS'][1],REQUEST)
else:
c()
# HTTP Range header handling
range = REQUEST.get_header('Range', None)
request_range = REQUEST.get_header('Request-Range', None)
if request_range is not None:
# Netscape 2 through 4 and MSIE 3 implement a draft version
# Later on, we need to serve a different mime-type as well.
range = request_range
if_range = REQUEST.get_header('If-Range', None)
if range is not None:
ranges = HTTPRangeSupport.parseRange(range)
if if_range is not None:
# Only send ranges if the data isn't modified, otherwise send
# the whole object. Support both ETags and Last-Modified dates!
if len(if_range) > 1 and if_range[:2] == 'ts':
# ETag:
if if_range != self.http__etag():
# Modified, so send a normal response. We delete
# the ranges, which causes us to skip to the 200
# response.
ranges = None
else:
# Date
date = if_range.split( ';')[0]
try: mod_since=long(DateTime(date).timeTime())
except: mod_since=None
if mod_since is not None:
if self._p_mtime:
last_mod = long(self._p_mtime)
else:
last_mod = long(0)
if last_mod > mod_since:
# Modified, so send a normal response. We delete
# the ranges, which causes us to skip to the 200
# response.
ranges = None
if ranges:
# Search for satisfiable ranges.
satisfiable = 0
for start, end in ranges:
if start < self.size:
satisfiable = 1
break
if not satisfiable:
RESPONSE.setHeader('Content-Range',
'bytes */%d' % self.size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Last-Modified',
rfc1123_date(self._p_mtime))
RESPONSE.setHeader('Content-Type', self.content_type)
RESPONSE.setHeader('Content-Length', self.size)
RESPONSE.setStatus(416)
return ''
ranges = HTTPRangeSupport.expandRanges(ranges, self.size)
if len(ranges) == 1:
# Easy case, set extra header and return partial set.
start, end = ranges[0]
size = end - start
RESPONSE.setHeader('Last-Modified',
rfc1123_date(self._p_mtime))
RESPONSE.setHeader('Content-Type', self.content_type)
RESPONSE.setHeader('Content-Length', size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Content-Range',
'bytes %d-%d/%d' % (start, end - 1, self.size))
RESPONSE.setStatus(206) # Partial content
data = self.data
if type(data) is StringType:
return data[start:end]
# Linked Pdata objects. Urgh.
pos = 0
while data is not None:
l = len(data.data)
pos = pos + l
if pos > start:
# We are within the range
lstart = l - (pos - start)
if lstart < 0: lstart = 0
# find the endpoint
if end <= pos:
lend = l - (pos - end)
# Send and end transmission
RESPONSE.write(data[lstart:lend])
break
# Not yet at the end, transmit what we have.
RESPONSE.write(data[lstart:])
data = data.next
return ''
else:
boundary = choose_boundary()
# Calculate the content length
size = (8 + len(boundary) + # End marker length
len(ranges) * ( # Constant lenght per set
49 + len(boundary) + len(self.content_type) +
len('%d' % self.size)))
for start, end in ranges:
# Variable length per set
size = (size + len('%d%d' % (start, end - 1)) +
end - start)
# Some clients implement an earlier draft of the spec, they
# will only accept x-byteranges.
draftprefix = (request_range is not None) and 'x-' or ''
RESPONSE.setHeader('Content-Length', size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Last-Modified',
rfc1123_date(self._p_mtime))
RESPONSE.setHeader('Content-Type',
'multipart/%sbyteranges; boundary=%s' % (
draftprefix, boundary))
RESPONSE.setStatus(206) # Partial content
data = self.data
# The Pdata map allows us to jump into the Pdata chain
# arbitrarily during out-of-order range searching.
pdata_map = {}
pdata_map[0] = data
for start, end in ranges:
RESPONSE.write('\r\n--%s\r\n' % boundary)
RESPONSE.write('Content-Type: %s\r\n' %
self.content_type)
RESPONSE.write(
'Content-Range: bytes %d-%d/%d\r\n\r\n' % (
start, end - 1, self.size))
if type(data) is StringType:
RESPONSE.write(data[start:end])
else:
# Yippee. Linked Pdata objects. The following
# calculations allow us to fast-forward through the
# Pdata chain without a lot of dereferencing if we
# did the work already.
first_size = len(pdata_map[0].data)
if start < first_size:
closest_pos = 0
else:
closest_pos = (
((start - first_size) >> 16 << 16) +
first_size)
pos = min(closest_pos, max(pdata_map.keys()))
data = pdata_map[pos]
while data is not None:
l = len(data.data)
pos = pos + l
if pos > start:
# We are within the range
lstart = l - (pos - start)
if lstart < 0: lstart = 0
# find the endpoint
if end <= pos:
lend = l - (pos - end)
# Send and loop to next range
RESPONSE.write(data[lstart:lend])
break
# Not yet at the end, transmit what we have.
RESPONSE.write(data[lstart:])
data = data.next
# Store a reference to a Pdata chain link so we
# don't have to deref during this request again.
pdata_map[pos] = data
# Do not keep the link references around.
del pdata_map
RESPONSE.write('\r\n--%s--\r\n' % boundary)
return ''
RESPONSE.setHeader('Last-Modified', rfc1123_date(self._p_mtime))
RESPONSE.setHeader('Content-Type', self.content_type)
RESPONSE.setHeader('Content-Length', self.size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
# Don't cache the data itself, but provide an opportunity
# for a cache manager to set response headers.
self.ZCacheable_set(None)
data=self.data
if type(data) is type(''):
RESPONSE.setBase(None)
return data
while data is not None:
RESPONSE.write(data.data)
data=data.next
return ''
def _range_request_handler(self, REQUEST, RESPONSE):
RESPONSE.setHeader("Content-Type", "application/octet-stream")
# HTTP Range header handling: return True if we've served a range
# chunk out of our data.
# convert ranges from bytes to array indices
slice_index = REQUEST.get('slice_index', None)
if slice_index is not None:
slice_index_list = []
for index in slice_index:
slice_index_list.append(slice(index.get('start'),
index.get('stop'),
index.get('step')))
list_index = REQUEST.get('list_index', None)
if list_index is not None:
RESPONSE.write(self.getArray()[tuple(slice_index_list)][list_index].tobytes())
else:
RESPONSE.write(self.getArray()[tuple(slice_index_list)].tobytes())
return True
range = REQUEST.get_header('Range', None)
request_range = REQUEST.get_header('Request-Range', None)
if request_range is not None:
# Netscape 2 through 4 and MSIE 3 implement a draft version
# Later on, we need to serve a different mime-type as well.
range = request_range
if_range = REQUEST.get_header('If-Range', None)
if range is not None:
ranges = HTTPRangeSupport.parseRange(range)
array = self.getArray()
factor = array.nbytes / array.shape[0]
if if_range is not None:
# Only send ranges if the data isn't modified, otherwise send
# the whole object. Support both ETags and Last-Modified dates!
if len(if_range) > 1 and if_range[:2] == 'ts':
# ETag:
if if_range != self.http__etag():
# Modified, so send a normal response. We delete
# the ranges, which causes us to skip to the 200
# response.
ranges = None
else:
# Date
date = if_range.split( ';')[0]
try: mod_since=long(DateTime(date).timeTime())
except: mod_since=None
if mod_since is not None:
last_mod = self._data_mtime()
if last_mod is None:
last_mod = 0
last_mod = long(last_mod)
if last_mod > mod_since:
# Modified, so send a normal response. We delete
# the ranges, which causes us to skip to the 200
# response.
ranges = None
if ranges:
# Search for satisfiable ranges.
satisfiable = 0
for start, end in ranges:
if start < self.getSize():
satisfiable = 1
break
if not satisfiable:
RESPONSE.setHeader('Content-Range',
'bytes */%d' % self.getSize())
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Last-Modified', rfc1123_date(self._data_mtime()))
RESPONSE.setHeader('Content-Type', self.content_type)
RESPONSE.setHeader('Content-Length', self.getSize())
RESPONSE.setStatus(416)
return True
ranges = HTTPRangeSupport.expandRanges(ranges, self.getSize())
if len(ranges) == 1:
# Easy case, set extra header and return partial set.
start, end = ranges[0]
size = end - start
RESPONSE.setHeader('Last-Modified', rfc1123_date(self._data_mtime()))
RESPONSE.setHeader('Content-Type', self.content_type)
RESPONSE.setHeader('Content-Length', size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Content-Range',
'bytes %d-%d/%d' % (start, end - 1, self.getSize()))
RESPONSE.setStatus(206) # Partial content
# convert ranges from bytes to array indices
RESPONSE.write(array[start/factor:end/factor].tobytes())
else:
boundary = choose_boundary()
# Calculate the content length
size = (8 + len(boundary) + # End marker length
len(ranges) * ( # Constant lenght per set
49 + len(boundary) + len(self.content_type) +
len('%d' % self.getSize())))
for start, end in ranges:
# Variable length per set
size = (size + len('%d%d' % (start, end - 1)) +
end - start)
# Some clients implement an earlier draft of the spec, they
# will only accept x-byteranges.
draftprefix = (request_range is not None) and 'x-' or ''
RESPONSE.setHeader('Content-Length', size)
RESPONSE.setHeader('Accept-Ranges', 'bytes')
RESPONSE.setHeader('Last-Modified', rfc1123_date(self._data_mtime()))
RESPONSE.setHeader('Content-Type',
'multipart/%sbyteranges; boundary=%s' % (
draftprefix, boundary))
RESPONSE.setStatus(206) # Partial content
for start, end in ranges:
RESPONSE.write('\r\n--%s\r\n' % boundary)
RESPONSE.write('Content-Type: %s\r\n' %
self.content_type)
RESPONSE.write(
'Content-Range: bytes %d-%d/%d\r\n\r\n' % (
start, end - 1, self.getSize()))
# convert ranges from bytes to array indices
RESPONSE.write(array[start/factor:end/factor].tobytes())
RESPONSE.write('\r\n--%s--\r\n' % boundary)
return True
