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import os
import tempfile
from datetime import datetime
from flask import Request, request, render_template, make_response, flash, redirect
from werkzeug.utils import secure_filename
from .. import strings
class ReceiveModeWeb(object):
"""
All of the web logic for receive mode
"""
def __init__(self, common, web):
self.common = common
self.common.log('ReceiveModeWeb', '__init__')
self.web = web
self.can_upload = True
self.upload_count = 0
self.uploads_in_progress = []
self.define_routes()
def define_routes(self):
"""
The web app routes for receiving files
"""
def index_logic():
self.web.add_request(self.web.REQUEST_LOAD, request.path)
if self.common.settings.get('public_mode'):
upload_action = '/upload'
else:
upload_action = '/{}/upload'.format(self.web.slug)
r = make_response(render_template(
'receive.html',
upload_action=upload_action))
return self.web.add_security_headers(r)
@self.web.app.route("/<slug_candidate>")
def index(slug_candidate):
if not self.can_upload:
return self.web.error403()
self.web.check_slug_candidate(slug_candidate)
return index_logic()
@self.web.app.route("/")
def index_public():
if not self.can_upload:
return self.web.error403()
if not self.common.settings.get('public_mode'):
return self.web.error404()
return index_logic()
def upload_logic(slug_candidate=''):
"""
Upload files.
"""
# Make sure the receive mode dir exists
now = datetime.now()
date_dir = now.strftime("%Y-%m-%d")
time_dir = now.strftime("%H.%M.%S")
receive_mode_dir = os.path.join(self.common.settings.get('data_dir'), date_dir, time_dir)
valid = True
try:
os.makedirs(receive_mode_dir, 0o700)
except PermissionError:
self.web.add_request(self.web.REQUEST_ERROR_DATA_DIR_CANNOT_CREATE, request.path, {
"receive_mode_dir": receive_mode_dir
})
print(strings._('error_cannot_create_data_dir').format(receive_mode_dir))
valid = False
if not valid:
flash('Error uploading, please inform the OnionShare user', 'error')
if self.common.settings.get('public_mode'):
return redirect('/')
else:
return redirect('/{}'.format(slug_candidate))
files = request.files.getlist('file[]')
filenames = []
print('')
for f in files:
if f.filename != '':
# Automatically rename the file, if a file of the same name already exists
filename = secure_filename(f.filename)
filenames.append(filename)
local_path = os.path.join(receive_mode_dir, filename)
if os.path.exists(local_path):
if '.' in filename:
# Add "-i", e.g. change "foo.txt" to "foo-2.txt"
parts = filename.split('.')
name = parts[:-1]
ext = parts[-1]
i = 2
valid = False
while not valid:
new_filename = '{}-{}.{}'.format('.'.join(name), i, ext)
local_path = os.path.join(receive_mode_dir, new_filename)
if os.path.exists(local_path):
i += 1
else:
valid = True
else:
# If no extension, just add "-i", e.g. change "foo" to "foo-2"
i = 2
valid = False
while not valid:
new_filename = '{}-{}'.format(filename, i)
local_path = os.path.join(receive_mode_dir, new_filename)
if os.path.exists(local_path):
i += 1
else:
valid = True
basename = os.path.basename(local_path)
if f.filename != basename:
# Tell the GUI that the file has changed names
self.web.add_request(self.web.REQUEST_UPLOAD_FILE_RENAMED, request.path, {
'id': request.upload_id,
'old_filename': f.filename,
'new_filename': basename
})
# Tell the GUI the receive mode directory for this file
self.web.add_request(self.web.REQUEST_UPLOAD_SET_DIR, request.path, {
'id': request.upload_id,
'filename': basename,
'dir': receive_mode_dir
})
self.common.log('ReceiveModeWeb', 'define_routes', '/upload, uploaded {}, saving to {}'.format(f.filename, local_path))
print(strings._('receive_mode_received_file').format(local_path))
f.save(local_path)
# Note that flash strings are on English, and not translated, on purpose,
# to avoid leaking the locale of the OnionShare user
if len(filenames) == 0:
flash('No files uploaded', 'info')
else:
for filename in filenames:
flash('Sent {}'.format(filename), 'info')
if self.can_upload:
if self.common.settings.get('public_mode'):
path = '/'
else:
path = '/{}'.format(slug_candidate)
return redirect('{}'.format(path))
else:
# It was the last upload and the timer ran out
if self.common.settings.get('public_mode'):
return thankyou_logic(slug_candidate)
else:
return thankyou_logic()
def thankyou_logic(slug_candidate=''):
r = make_response(render_template(
'thankyou.html'))
return self.web.add_security_headers(r)
@self.web.app.route("/<slug_candidate>/upload", methods=['POST'])
def upload(slug_candidate):
if not self.can_upload:
return self.web.error403()
self.web.check_slug_candidate(slug_candidate)
return upload_logic(slug_candidate)
@self.web.app.route("/upload", methods=['POST'])
def upload_public():
if not self.can_upload:
return self.web.error403()
if not self.common.settings.get('public_mode'):
return self.web.error404()
return upload_logic()
class ReceiveModeWSGIMiddleware(object):
"""
Custom WSGI middleware in order to attach the Web object to environ, so
ReceiveModeRequest can access it.
"""
def __init__(self, app, web):
self.app = app
self.web = web
def __call__(self, environ, start_response):
environ['web'] = self.web
return self.app(environ, start_response)
class ReceiveModeTemporaryFile(object):
"""
A custom TemporaryFile that tells ReceiveModeRequest every time data gets
written to it, in order to track the progress of uploads.
"""
def __init__(self, filename, write_func, close_func):
self.onionshare_filename = filename
self.onionshare_write_func = write_func
self.onionshare_close_func = close_func
# Create a temporary file
self.f = tempfile.TemporaryFile('wb+')
# Make all the file-like methods and attributes actually access the
# TemporaryFile, except for write
attrs = ['closed', 'detach', 'fileno', 'flush', 'isatty', 'mode',
'name', 'peek', 'raw', 'read', 'read1', 'readable', 'readinto',
'readinto1', 'readline', 'readlines', 'seek', 'seekable', 'tell',
'truncate', 'writable', 'writelines']
for attr in attrs:
setattr(self, attr, getattr(self.f, attr))
def write(self, b):
"""
Custom write method that calls out to onionshare_write_func
"""
bytes_written = self.f.write(b)
self.onionshare_write_func(self.onionshare_filename, bytes_written)
def close(self):
"""
Custom close method that calls out to onionshare_close_func
"""
self.f.close()
self.onionshare_close_func(self.onionshare_filename)
class ReceiveModeRequest(Request):
"""
A custom flask Request object that keeps track of how much data has been
uploaded for each file, for receive mode.
"""
def __init__(self, environ, populate_request=True, shallow=False):
super(ReceiveModeRequest, self).__init__(environ, populate_request, shallow)
self.web = environ['web']
# Is this a valid upload request?
self.upload_request = False
if self.method == 'POST':
if self.path == '/{}/upload'.format(self.web.slug):
self.upload_request = True
else:
if self.web.common.settings.get('public_mode'):
if self.path == '/upload':
self.upload_request = True
if self.upload_request:
# A dictionary that maps filenames to the bytes uploaded so far
self.progress = {}
# Prevent new uploads if we've said so (timer expired)
if self.web.receive_mode.can_upload:
# Create an upload_id, attach it to the request
self.upload_id = self.web.receive_mode.upload_count
self.web.receive_mode.upload_count += 1
# Figure out the content length
try:
self.content_length = int(self.headers['Content-Length'])
except:
self.content_length = 0
print("{}: {}".format(
datetime.now().strftime("%b %d, %I:%M%p"),
strings._("receive_mode_upload_starting").format(self.web.common.human_readable_filesize(self.content_length))
))
# Don't tell the GUI that a request has started until we start receiving files
self.told_gui_about_request = False
self.web.receive_mode.uploads_in_progress.append(self.upload_id)
self.previous_file = None
def _get_file_stream(self, total_content_length, content_type, filename=None, content_length=None):
"""
This gets called for each file that gets uploaded, and returns an file-like
writable stream.
"""
if self.upload_request:
if not self.told_gui_about_request:
# Tell the GUI about the request
self.web.add_request(self.web.REQUEST_STARTED, self.path, {
'id': self.upload_id,
'content_length': self.content_length
})
self.told_gui_about_request = True
self.progress[filename] = {
'uploaded_bytes': 0,
'complete': False
}
return ReceiveModeTemporaryFile(filename, self.file_write_func, self.file_close_func)
def close(self):
"""
Closing the request.
"""
super(ReceiveModeRequest, self).close()
try:
upload_id = self.upload_id
# Inform the GUI that the upload has finished
self.web.add_request(self.web.REQUEST_UPLOAD_FINISHED, self.path, {
'id': upload_id
})
self.web.receive_mode.uploads_in_progress.remove(upload_id)
except AttributeError:
pass
def file_write_func(self, filename, length):
"""
This function gets called when a specific file is written to.
"""
if self.upload_request:
self.progress[filename]['uploaded_bytes'] += length
if self.previous_file != filename:
if self.previous_file is not None:
print('')
self.previous_file = filename
print('\r=> {:15s} {}'.format(
self.web.common.human_readable_filesize(self.progress[filename]['uploaded_bytes']),
filename
), end='')
# Update the GUI on the upload progress
self.web.add_request(self.web.REQUEST_PROGRESS, self.path, {
'id': self.upload_id,
'progress': self.progress
})
def file_close_func(self, filename):
"""
This function gets called when a specific file is closed.
"""
self.progress[filename]['complete'] = True
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