Commit 82c36966 authored by Jérome Perrin's avatar Jérome Perrin

big_file: py3

parent 395566b6
......@@ -23,14 +23,17 @@ from erp5.component.module.BTreeData import BTreeData
from ZPublisher.HTTPRequest import FileUpload
from ZPublisher import HTTPRangeSupport
from zope.datetime import rfc1123_date
from mimetools import choose_boundary
from Products.CMFCore.utils import _setCacheHeaders, _ViewEmulator
from DateTime import DateTime
import re
import io
import six
if six.PY3:
long = int # pylint:disable=redefined-builtin
from email.generator import _make_boundary as choose_boundary
else:
from mimetools import choose_boundary
class BigFile(File):
"""
......@@ -43,10 +46,10 @@ class BigFile(File):
data property is either
- BTreeData instance, or
- str(*), or
- bytes(*), or
- None.
(*) str has to be supported because '' is a default value for `data` field
(*) bytes has to be supported because b'' is a default value for `data` field
from Data property sheet.
Even more - for
......@@ -55,7 +58,7 @@ class BigFile(File):
b) desire to support automatic migration of File-based documents
from document_module to BigFiles
non-empty str for data also have to be supported.
non-empty bytes for data also have to be supported.
XXX(kirr) I'm not sure supporting non-empty str is a good idea (it
would be simpler if .data could be either BTreeData or "empty"),
......@@ -64,6 +67,8 @@ class BigFile(File):
We discussed with Romain and settled on "None or str or BTreeData"
invariant for now.
notes: for python3 port "str" becomes "bytes", but kirr message was not modified.
"""
meta_type = 'ERP5 Big File'
......@@ -115,9 +120,9 @@ class BigFile(File):
# of memory.
n=1 << 16
if isinstance(file, str):
if isinstance(file, bytes):
# Big string: cut it into smaller chunks
file = StringIO(file)
file = io.BytesIO(file)
if isinstance(file, FileUpload) and not file:
raise ValueError('File not specified')
......@@ -130,9 +135,9 @@ class BigFile(File):
if data is None:
btree = BTreeData()
elif isinstance(data, str):
elif isinstance(data, bytes):
# we'll want to append content to this file -
# - automatically convert str (empty or not) to BTreeData
# - automatically convert bytes (empty or not) to BTreeData
btree = BTreeData()
btree.write(data, 0)
else:
......@@ -236,7 +241,7 @@ class BigFile(File):
RESPONSE.setStatus(206) # Partial content
# NOTE data cannot be None here (if it is - ranges are not satisfiable)
if isinstance(data, str):
if isinstance(data, bytes):
RESPONSE.write(data[start:end])
return True
for chunk in data.iterate(start, end-start):
......@@ -271,22 +276,22 @@ class BigFile(File):
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(('\r\n--%s\r\n' % boundary).encode())
RESPONSE.write(('Content-Type: %s\r\n' %
self.content_type).encode())
RESPONSE.write(
'Content-Range: bytes %d-%d/%d\r\n\r\n' % (
start, end - 1, self.getSize()))
('Content-Range: bytes %d-%d/%d\r\n\r\n' % (
start, end - 1, self.getSize())).encode())
# NOTE data cannot be None here (if it is - ranges are not satisfiable)
if isinstance(data, str):
if isinstance(data, bytes):
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)
RESPONSE.write(('\r\n--%s--\r\n' % boundary).encode())
return True
security.declareProtected(Permissions.View, 'index_html')
......@@ -296,7 +301,7 @@ class BigFile(File):
"""
if self._range_request_handler(REQUEST, RESPONSE):
# we served a chunk of content in response to a range request.
return ''
return b''
web_cache_kw = kw.copy()
if format is not _MARKER:
......@@ -327,13 +332,13 @@ class BigFile(File):
if data is None:
return ''
if isinstance(data, str):
return b''
if isinstance(data, bytes):
RESPONSE.setBase(None)
return data
for chunk in data.iterate():
RESPONSE.write(chunk)
return ''
return b''
security.declareProtected(Permissions.ModifyPortalContent,'PUT')
def PUT(self, REQUEST, RESPONSE):
......
......@@ -3,6 +3,7 @@ from BTrees.LOBTree import LOBTree
from persistent import Persistent
import itertools
from six.moves import range
import six
# Maximum memory to allocate for sparse-induced padding.
MAX_PADDING_CHUNK = 2 ** 20
......@@ -11,11 +12,13 @@ class PersistentString(Persistent):
def __init__(self, value):
self.value = value
def __str__(self):
def __bytes__(self):
return self.value
if six.PY2:
__str__ = __bytes__
# Save place when storing this data in zodb
__getstate__ = __str__
__getstate__ = __bytes__
__setstate__ = __init__
negative_offset_error = ValueError('Negative offset')
......@@ -110,7 +113,7 @@ class BTreeData(Persistent):
chunk = tree[lower_key]
chunk_end = lower_key + len(chunk.value)
if chunk_end > offset or (
len(chunk.value) < self._chunk_size and
len(chunk.value) < (self._chunk_size or 0) and
chunk_end == offset
):
key = lower_key
......@@ -137,7 +140,7 @@ class BTreeData(Persistent):
try:
chunk = tree[key]
except KeyError:
tree[key] = chunk = PersistentString('')
tree[key] = chunk = PersistentString(b'')
entry_size = len(chunk.value)
if entry_size < to_write_len:
to_write_len = min(to_write_len, max_to_write_len)
......@@ -158,9 +161,9 @@ class BTreeData(Persistent):
size (int)
Number of bytes to read.
Returns string of read data.
Returns bytes of read data.
"""
return ''.join(self.iterate(offset, size))
return b''.join(self.iterate(offset, size))
def iterate(self, offset=0, size=None):
"""
......@@ -243,7 +246,7 @@ class BTreeData(Persistent):
except ValueError:
break
del tree[key]
self.write('', offset)
self.write(b'', offset)
# XXX: Various batch_size values need to be benchmarked, and a saner
# default is likely to be applied.
......@@ -314,12 +317,11 @@ class BTreeData(Persistent):
tree[key] = next_chunk
if __name__ == '__main__':
def check(tree, length, read_offset, read_length, data_, keys=None):
print(list(tree._tree.items()))
tree_length = len(tree)
tree_data = tree.read(read_offset, read_length)
tree_iterator_data = ''.join(tree.iterate(read_offset, read_length))
tree_iterator_data = b''.join(tree.iterate(read_offset, read_length))
assert tree_length == length, tree_length
assert tree_data == data_, repr(tree_data)
assert tree_iterator_data == data_, repr(tree_iterator_data)
......
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