def TestOneInput(data): fdp = atheris.FuzzedDataProvider(data) whttp.parse_content_range_header(fdp.ConsumeUnicode(100)) whttp.parse_range_header(fdp.ConsumeUnicode(100)) whttp.parse_set_header(fdp.ConsumeUnicode(100)) whttp.parse_etags(fdp.ConsumeUnicode(100)) whttp.parse_if_range_header(fdp.ConsumeUnicode(100)) whttp.parse_dict_header(fdp.ConsumeUnicode(100))
def _put_log(self, log_file, req):
if req.content_length is None:
raise LengthRequired()
content_range = parse_content_range_header(req.headers.get('Content-Range'))
if content_range:
# a few sanity checks
if req.content_length != (content_range.stop - content_range.start):
raise BadRequest('Content length does not match range length')
if content_range.length and content_range.length < content_range.stop:
raise BadRequest('Total length is smaller than range end')
try:
with log_file:
if content_range:
if content_range.length: # length may be '*' meaning unspecified
log_file.truncate(content_range.length)
log_file.update_chunk(req.data, content_range.start)
else:
# no Content-Range, therefore the request is the whole file
log_file.truncate(req.content_length)
log_file.update_chunk(req.data, 0)
# XXX need to find a less fragile way to do this
except xmlrpclib.Fault, fault:
if 'Cannot register file for finished ' in fault.faultString:
return Response(status=409, response=fault.faultString,
content_type='text/plain')
elif 'Too many ' in fault.faultString:
return Response(status=403, response=fault.faultString,
content_type='text/plain')
else:
raise
def _put_log(self, log_file, req):
if req.content_length is None:
raise LengthRequired()
content_range = parse_content_range_header(
req.headers.get('Content-Range'))
if content_range:
# a few sanity checks
if req.content_length != (content_range.stop -
content_range.start):
raise BadRequest('Content length does not match range length')
if content_range.length and content_range.length < content_range.stop:
raise BadRequest('Total length is smaller than range end')
try:
with log_file:
if content_range:
if content_range.length: # length may be '*' meaning unspecified
log_file.truncate(content_range.length)
log_file.update_chunk(req.data, content_range.start)
else:
# no Content-Range, therefore the request is the whole file
log_file.truncate(req.content_length)
log_file.update_chunk(req.data, 0)
# XXX need to find a less fragile way to do this
except xmlrpclib.Fault, fault:
if 'Cannot register file for finished ' in fault.faultString:
return Response(status=409,
response=fault.faultString,
content_type='text/plain')
elif 'Too many ' in fault.faultString:
return Response(status=403,
response=fault.faultString,
content_type='text/plain')
else:
raise
def write_share_data(self, request, authorization, storage_index, share_number):
"""Write data to an in-progress immutable upload."""
content_range = parse_content_range_header(request.getHeader("content-range"))
if content_range is None or content_range.units != "bytes":
request.setResponseCode(http.REQUESTED_RANGE_NOT_SATISFIABLE)
return b""
offset = content_range.start
# TODO limit memory usage
# https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3872
data = request.content.read(content_range.stop - content_range.start + 1)
bucket = self._uploads.get_write_bucket(
storage_index, share_number, authorization[Secrets.UPLOAD]
)
try:
finished = bucket.write(offset, data)
except ConflictingWriteError:
request.setResponseCode(http.CONFLICT)
return b""
if finished:
bucket.close()
request.setResponseCode(http.CREATED)
else:
request.setResponseCode(http.OK)
required = []
for start, end, _ in bucket.required_ranges().ranges():
required.append({"begin": start, "end": end})
return self._send_encoded(request, {"required": required})
def put(self, session, restype, attachment_id):
image_store_pymongo, _, attachment = session._fetch_attachment(restype, attachment_id)
# only accept a single file from a form
if len(request.files.items(multi=True)) != 1:
abort(400, details='Exactly one file must be provided.')
uploaded_file = request.files.itervalues().next()
content_range = parse_content_range_header(request.headers.get('Content-Range'))
if not content_range:
abort(400, details='A PUT request to modify an attachment must include a Content-Range header.')
if content_range.units != 'bytes':
abort(400, details='Only a range-unit of "bytes" may be used in a Content-Range header.')
if content_range.start is None:
abort(400, details='The content\'s start and end positions must be specified in the Content-Range header.')
# 'parse_content_range_header' guarantees that 'content_range.stop' must
# also be specified if 'start' is
if content_range.length is None:
# TODO: getting rid of this restriction would be nice, but we'd need
# a way to know when the final chunk was uploaded
abort(400, details='The content\'s total length must be specified in the Content-Range header.')
if content_range.start % attachment.chunkSize != 0:
abort(400, details='The content\'s start location must be a multiple of the content\'s chunk size.')
content_chunk_size = content_range.stop - content_range.start
if (content_chunk_size != attachment.chunkSize) and (content_range.stop != content_range.length):
# only the end chunk can be shorter
abort(400, details='Upload content chunk size does not match existing GridFS chunk size.')
chunk_num = (content_range.start / attachment.chunkSize)
image_store_pymongo['attachments.chunks'].insert({
'files_id': attachment._id,
'n': chunk_num,
'data': Binary(uploaded_file.read()),
})
# chunks may be sent out of order, so the only way to determine if all
# chunks were received is to count
expected_chunks = int(math.ceil(float(content_range.length) / float(attachment.chunkSize)))
received_chunks = image_store_pymongo['attachments.chunks'].find({'files_id': attachment._id}).count()
if expected_chunks == received_chunks:
# update the attachment metadata
md5 = image_store_pymongo.command('filemd5', attachment._id, root='attachments')['md5']
image_store_pymongo['attachments.files'].update(
{'_id': attachment._id},
{'$set': {
'length': content_range.length,
'md5': md5,
'uploadDate': datetime.datetime.utcnow()
}}
)
return None, 204 # No Content
def file_uploader_ui():
package_id = request.form['package_id']
package_show = toolkit.get_action('package_show')
# this ensures current user is authorized to view the package
package = package_show(data_dict={'name_or_id': package_id})
package_id = package['id']
assert package
file_storage = request.files['files[]'] # type: FileStorage
file_range = parse_content_range_header(request.headers.get('Content-Range'))
if file_range:
log.debug("File Uploader Received File: %s [%d / %d]",file_storage.filename, file_range.stop, file_range.length)
else:
log.debug("File Uploader Received File: %s",file_storage.filename)
storage_path = os.path.join(
toolkit.config.get('ckan.storage_path'),
toolkit.config.get('ckanext.file_uploader_ui_path', 'file_uploader_ui'),
package_id)
# Keep these logs appearing in production for the Jan 2020 West Africa meet
try:
os.makedirs(storage_path)
except OSError as e:
# errno 17 is file already exists
if e.errno != 17:
raise
file_path = os.path.join(storage_path, file_storage.filename)
try:
if 0 and os.path.exists(file_path) and file_range.start == 0:
# Abort if file exists already
return toolkit.abort(400, 'File with that name already in progress')
elif file_range is None or file_range.start == 0:
log.debug("Bulk uploading to temporary file %s",file_path)
with open(file_path, 'wb') as f:
f.write(file_storage.stream.read())
else:
with open(file_path, 'ab') as f:
f.seek(file_range.start)
f.write(file_storage.stream.read())
except OSError:
# log.exception will include the traceback so we can see what's wrong
log.exception('Failed to write content to file %s',file_path)
return toolkit.abort(500, 'File upload failed')
return jsonify({'files': [{'name': file_storage.filename, 'size':os.path.getsize(file_path)}]})
def test_content_range_parsing():
rv = http.parse_content_range_header('bytes 0-98/*')
assert rv.units == 'bytes'
assert rv.start == 0
assert rv.stop == 99
assert rv.length is None
assert rv.to_header() == 'bytes 0-98/*'
rv = http.parse_content_range_header('bytes 0-98/*asdfsa')
assert rv is None
rv = http.parse_content_range_header('bytes 0-99/100')
assert rv.to_header() == 'bytes 0-99/100'
rv.start = None
rv.stop = None
assert rv.units == 'bytes'
assert rv.to_header() == 'bytes */100'
rv = http.parse_content_range_header('bytes */100')
assert rv.start is None
assert rv.stop is None
assert rv.length == 100
assert rv.units == 'bytes'
def test_content_range_parsing():
rv = http.parse_content_range_header('bytes 0-98/*')
assert rv.units == 'bytes'
assert rv.start == 0
assert rv.stop == 99
assert rv.length is None
assert rv.to_header() == 'bytes 0-98/*'
rv = http.parse_content_range_header('bytes 0-98/*asdfsa')
assert rv is None
rv = http.parse_content_range_header('bytes 0-99/100')
assert rv.to_header() == 'bytes 0-99/100'
rv.start = None
rv.stop = None
assert rv.units == 'bytes'
assert rv.to_header() == 'bytes */100'
rv = http.parse_content_range_header('bytes */100')
assert rv.start is None
assert rv.stop is None
assert rv.length == 100
assert rv.units == 'bytes'
def test_content_range_parsing(self):
rv = http.parse_content_range_header("bytes 0-98/*")
assert rv.units == "bytes"
assert rv.start == 0
assert rv.stop == 99
assert rv.length is None
assert rv.to_header() == "bytes 0-98/*"
rv = http.parse_content_range_header("bytes 0-98/*asdfsa")
assert rv is None
rv = http.parse_content_range_header("bytes 0-99/100")
assert rv.to_header() == "bytes 0-99/100"
rv.start = None
rv.stop = None
assert rv.units == "bytes"
assert rv.to_header() == "bytes */100"
rv = http.parse_content_range_header("bytes */100")
assert rv.start is None
assert rv.stop is None
assert rv.length == 100
assert rv.units == "bytes"
def test_content_range_parsing():
rv = http.parse_content_range_header("bytes 0-98/*")
assert rv.units == "bytes"
assert rv.start == 0
assert rv.stop == 99
assert rv.length is None
assert rv.to_header() == "bytes 0-98/*"
rv = http.parse_content_range_header("bytes 0-98/*asdfsa")
assert rv is None
rv = http.parse_content_range_header("bytes 0-99/100")
assert rv.to_header() == "bytes 0-99/100"
rv.start = None
rv.stop = None
assert rv.units == "bytes"
assert rv.to_header() == "bytes */100"
rv = http.parse_content_range_header("bytes */100")
assert rv.start is None
assert rv.stop is None
assert rv.length == 100
assert rv.units == "bytes"
def content_range(self) -> ContentRange:
"""The ``Content-Range`` header as a
:class:`~werkzeug.datastructures.ContentRange` object. Available
even if the header is not set.
.. versionadded:: 0.7
"""
def on_update(rng: ContentRange) -> None:
if not rng:
del self.headers["content-range"]
else:
self.headers["Content-Range"] = rng.to_header()
rv = parse_content_range_header(self.headers.get("content-range"),
on_update)
# always provide a content range object to make the descriptor
# more user friendly. It provides an unset() method that can be
# used to remove the header quickly.
if rv is None:
rv = ContentRange(None, None, None, on_update=on_update)
return rv
def parse_content_range(
range_header: Optional[str],
) -> Tuple[Optional[int], Optional[int], Optional[int]]:
if range_header is None:
return None, None, None
content_range = parse_content_range_header(range_header)
if content_range is None:
log.error("Unable to parse Content-Range: {}", range_header)
tokens = range_header.split("/")
if len(tokens) != 2:
log.error("Invalid Content-Range: {}", range_header)
return None, None, None
if not tokens[1].isnumeric():
log.error("Invalid Content-Range: {}", range_header)
return None, None, None
total_length = int(tokens[1])
start = 0
stop = total_length
return total_length, start, stop
total_length = int(content_range.length)
# es: 'bytes */35738983'
if content_range.start is None:
start = 0
else:
start = int(content_range.start)
if content_range.stop is None:
stop = total_length
else:
stop = int(content_range.stop)
return total_length, start, stop
def parse_content_range(
range_header: Optional[str],
) -> Tuple[Optional[int], Optional[int], Optional[int]]:
if range_header is None:
return None, None, None
content_range = parse_content_range_header(range_header)
if content_range is None:
log.error("Unable to parse Content-Range: {}", range_header)
tokens = range_header.split("/")
if len(tokens) != 2:
log.error("Invalid Content-Range: {}", range_header)
return None, None, None
if not tokens[1].isnumeric():
log.error("Invalid Content-Range: {}", range_header)
return None, None, None
# A pattern like */len is expected
# => is returned start == 0 and stop == len
tot_len = int(tokens[1])
return tot_len, 0, tot_len
total_length = content_range.length
# es: 'bytes */35738983'
if content_range.start is None:
start = 0
else:
start = content_range.start
if content_range.stop is None:
stop = total_length
else:
stop = content_range.stop
return total_length, start, stop
def content_range(self) -> ContentRange:
def on_update(cache_range: ContentRange) -> None:
self.content_range = cache_range
return parse_content_range_header(self.headers.get("Content-Range"),
on_update)
def chunk_upload(self, upload_dir, filename, chunk_size=None):
filename = secure_filename(filename)
try:
range_header = request.headers.get("Content-Range")
# content_length = request.headers.get("Content-Length")
content_range = parse_content_range_header(range_header)
if content_range is None:
log.error("Unable to parse Content-Range: {}", range_header)
completed = True
start = 0
total_length = int(range_header.split("/")[1])
stop = int(total_length)
else:
# log.warning(content_range)
start = int(content_range.start)
stop = int(content_range.stop)
total_length = int(content_range.length)
# log.critical(content_range.start)
# log.critical(content_range.stop)
# log.critical(content_range.length)
# log.critical(content_range.units)
completed = (stop >= total_length)
except BaseException as e:
log.error("Unable to parse Content-Range: {}", range_header)
log.error(str(e))
completed = False
return completed, self.force_response("Invalid request")
# Default chunk size, put this somewhere
if chunk_size is None:
chunk_size = 1048576
file_path = os.path.join(upload_dir, filename)
with open(file_path, "ab") as f:
while True:
chunk = request.stream.read(chunk_size)
if not chunk:
break
f.seek(start)
f.write(chunk)
if completed:
# Extra info
ftype = None
fcharset = None
try:
# Check the type
from plumbum.cmd import file
out = file["-ib", file_path]()
tmp = out.split(';')
ftype = tmp[0].strip()
fcharset = tmp[1].split('=')[1].strip()
except Exception:
log.warning("Unknown type for '{}'", file_path)
return completed, self.force_response(
{
'filename': filename,
'meta': {
'type': ftype,
'charset': fcharset
}
},
code=200)
return completed, self.force_response(
"partial",
headers={
"Access-Control-Expose-Headers": "Range",
"Range": "0-{}".format(stop - 1)
},
code=206)
def post(self, session, restype="attachments"):
if restype == "attachments":
if len(request.files.items(multi=True)) != 1:
abort(400, details='Exactly one file must be provided.')
uploaded_file = request.files.itervalues().next()
gridfs_args = dict()
# file name
if not uploaded_file.filename:
abort(400, details='The file must contain a filename.')
# TODO: filter the filename to remove special characters and ensure length < 255
gridfs_args['filename'] = uploaded_file.filename
# chunked uploads
content_range = parse_content_range_header(request.headers.get('Content-Range'))
if content_range and (content_range.stop != content_range.length):
if content_range.start != 0:
abort(400, details='A POST with partial content must not contain a fragment past the start of the entity.')
if content_range.units != 'bytes':
abort(400, details='Only a range-unit of "bytes" may be used in a Content-Range header.')
content_chunk_size = content_range.stop - content_range.start
gridfs_args['chunkSize'] = content_chunk_size
# content type
# TODO: get the content type via libmagic, so a client can't falsify it
# via headers or filename extension
# TODO: reject dangerous file types, like .exe or .html
# first, try the client's headers for content type
if uploaded_file.mimetype and uploaded_file.mimetype != 'application/octet-stream':
# "mimetype" doesn't include charset options
gridfs_args['contentType'] = uploaded_file.mimetype
else:
# if the headers are non-specific, try the filename extension
extension_content_type = mimetypes.guess_type(uploaded_file.filename, strict=False)[0]
if extension_content_type:
gridfs_args['contentType'] = extension_content_type
# if getting the content type failed, leave "gridfs_args['contentType']" unset
# save into GridFS
image_store = session.collection.image_store
attachments_fs = gridfs.GridFS(image_store.to_pymongo(raw_object=True), 'attachments')
attachment = attachments_fs.new_file(**gridfs_args)
try:
# this will stream the IO, instead of loading it all into memory
uploaded_file.save(attachment)
finally:
attachment.close()
uploaded_file.close()
# add to session
attachments_ref = models.RefItem(ref=attachment._id, db=image_store.id)
session.attachments.append(attachments_ref)
session.save()
# return response
new_location = url_for('.session_attachment_item', session=session,
restype=restype, attachment_id=attachment._id)
return (None, # TODO: return body with metadata?
201, # Created
{'Location': new_location})
elif restype == "imagefiles":
# Need to create a location in sessions with current image store as the default image store
# add to session
ref_id = bson.ObjectId()
return {"id": str(ref_id), "restype": "images"}, 201
else:
# Should never reach here
return {"Error": "Unknown restype: " + restype}, 404
