From dc1baaa1b1079516a7e2aead21f9af847e64494d Mon Sep 17 00:00:00 2001 From: Simeon Simeonov Date: Mon, 2 Aug 2021 21:14:40 +0200 Subject: Initial commit --- .gitignore | 1 + COPYING | 674 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ LICENSE | 674 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ Makefile | 11 + README.md | 171 ++++++++++++++ ngus/__init__.py | 128 +++++++++++ ngus/__main__.py | 114 ++++++++++ setup.py | 46 ++++ 8 files changed, 1819 insertions(+) create mode 100644 .gitignore create mode 100644 COPYING create mode 100644 LICENSE create mode 100644 Makefile create mode 100644 README.md create mode 100644 ngus/__init__.py create mode 100644 ngus/__main__.py create mode 100644 setup.py diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..c18dd8d --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +__pycache__/ diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..852f221 --- /dev/null +++ b/Makefile @@ -0,0 +1,11 @@ +package: COPYING ngus/__init__.py ngus/__main__.py LICENSE README.md setup.py + python setup.py sdist bdist_wheel + +upload: dist/* + python -m twine upload dist/* + +upload-test: dist/* + python -m twine upload --repository testpypi dist/* + +clean: + rm -rf build dist ngus/__pycache__ ngus.egg-info diff --git a/README.md b/README.md new file mode 100644 index 0000000..67689ad --- /dev/null +++ b/README.md @@ -0,0 +1,171 @@ +# ngus + +*ngus* is a minimalist HTTP server written in pure Python and intended for +receiving file uploads + + +## Motivation + +The reason for writing this small package was the need to transfer files from +a Windows desktop machine running on a highly restricted VPN to my GNU and UNIX +systems. + +Since the HTTP traffic (out) was not restricted, I started looking for a small +, yet flexible HTTP server that could satisfy the following criteria: + +- can be configured with the help of a few CLI parameters + +- can be started and stopped quickly by an unprivileged user + +- be able to receive uploads to a specific directory + +- be portable and require a minimal amount of dependencies + +- be part of the C/C++ or Python ecosystems + +To my amazement I wasn't able to find any free software matching that criteria. + + +## Overview + +The main purpose of *ngus* is to accept file uploads as POST requests from an +HTTP client. + +Currently *ngus* does not provide encryption (HTTPS) support. Many different +tools can be employed to serve as an HTTPS proxy. + +See the examples bellow for more details! + + +## Installation + +### pip (pypi) + + ```bash + pip install ngus + ``` + + +### Gentoo + + ```bash + layman -a sgs + emerge www-servers/ngus + ``` + + +## Examples + +When installing *ngus* as described above, a dedicated *ngus* script +(entry point) will be installed in addition to the *ngus* Python module. + +Running: + + ```bash + ngus -h + ``` + +will be for all practical purposes the same as running: + + ```bash + python -m ngus -h + ``` + +The latter format will be used for the rest of this section. + + + ```bash + python -m ngus -H 0.0.0.0 -p 8080 + ``` + +will start the server, binding port 8080 on all available interfaces and +storing the received uploads in the current working directory (CWD), while + + ```bash + python -m ngus -H 0.0.0.0 -p 8080 -u /home/s/uploads + ``` + +will store them in `/home/s/uploads` + +**Note:** This will allow *ngus* to replace any existing file in this directory. + +Once the server is running a client will be able to send a POST form with a +file data. One can always access the URL (send a GET request) with a regular +browser and use the provided form or simply use a client like *curl* for +posting (sending a POST request) a form. + + ```bash + curl -F "ufile=@myfile.zip" http://158.39.125.240:8080 + ``` + +The default form input field name is *ufile*. That can be changed by using the +*--input-name* parameter. Basic auth support can be added with the +*--basic-auth* parameter. + + ```bash + python -m ngus -H 0.0.0.0 -p 8080 -i uploadfile -b "uname:foo" -u /home/s/uploads + curl --basic -u uname -F "uploadfile=@myfile.zip" http://158.39.125.240:8080 + ``` + + +### Using *nginx* as a proxy + +*ngus* will usually not be run on ports 80 (HTTP) and 443 (HTTPS) since binding +them requires administrator (root) privileges. + +Running *ngus* on a unprivileged port (> 1024) may not solve the problem +described above. Namely a potential client may not be able to communicate to +ports other than 80 and 443 because of imposed firewall / VPN restrictions. + +Another potential challenge arises when *ngus* runs on a host that is not +publicly accessible. + +*nginx* can be used to proxy the traffic toward *ngus* instance running as +described in the examples above. + + ```nginx + server { + + listen 443 ssl; + listen 80; + server_name uploads.myhostname.net; + + access_log /var/log/nginx/uploads.myhostname.net.access.log; + error_log /var/log/nginx/uploads.myhostname.net.error.log error; + + ssl_certificate uploads.myhostname.net.cert.pem; + ssl_certificate_key uploads.myhostname.net.key.pem; + + location / { + # point at the ngus instance running on a private network address + proxy_pass http://192.168.1.240:8080/; + } + + } + ``` + +... and then upload a file with: + + ```bash + curl -F "ufile=@myfile.zip" https://uploads.myhostname.net + ``` + + +## Support and contributing + +ngus is hosted on GitHub: https://github.com/blackm0re/ngus + + +## Author + +Simeon Simeonov - sgs @ LiberaChat + + +## [License](https://github.com/blackm0re/ngus/blob/master/LICENSE) + +Copyright (c) 2021, Simeon Simeonov +All rights reserved. + +[Licensed](https://github.com/blackm0re/ngus/blob/master/LICENSE) under the +GNU General Public License v3.0 or later. +SPDX-License-Identifier: GPL-3.0-or-later diff --git a/ngus/__init__.py b/ngus/__init__.py new file mode 100644 index 0000000..2b2be7d --- /dev/null +++ b/ngus/__init__.py @@ -0,0 +1,128 @@ +# ngus v1.0 +# Copyright (C) 2021 Simeon Simeonov + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +import cgi +import http.server +import pathlib + +__author__ = 'Simeon Simeonov' +__version__ = '1.0' +__license__ = 'GPL3' + +DEFAULT_UPLOAD_PAGE = bytes(''' + + +File Upload + + + + +

File Upload

+
+ +
+
+ +
+ +''', 'utf-8') + + +class NgusBaseHTTPRequestHandler(http.server.BaseHTTPRequestHandler): + """ + A custom http.server.SimpleHTTPRequestHandler that handles POST uploads + """ + def do_GET(self): + """GET requests will load the upload page""" + self._send_upload_page() + + def do_POST(self): + """POST requests will be handled according to the settings""" + if self.server.basic_auth is not None: + if ( + 'Authorization' not in self.headers + or len(self.headers['Authorization'].split()) != 2 + or self.headers['Authorization'].split()[0].lower() != 'basic' + or self.headers[ + 'Authorization' + ].split()[1] != self.server.basic_auth + ): + self.send_response(http.HTTPStatus.UNAUTHORIZED) + self.send_header('WWW-Authenticate', + 'Basic realm="ngus", charset="UTF-8"') + self.end_headers() + return None + form = cgi.FieldStorage(fp=self.rfile, + headers=self.headers, + environ={'REQUEST_METHOD': 'POST'}) + if not (upload_dir := self.server.upload_dir).is_dir(): + raise ValueError('upload_dir is not a directory') + i_name = self.server.input_name + if i_name in form and form[i_name].file and form[i_name].filename: + with open( + upload_dir / pathlib.Path(form[i_name].filename).name, + 'wb' + ) as f: + f.write(form[i_name].file.read()) + self._send_upload_page() + return None + + def _send_upload_page(self): + """Renders an upload page (form)""" + self.send_response(http.HTTPStatus.OK) + self.send_header('Content-Type', 'text/html; charset=utf-8') + self.send_header('Content-Length', len(self.server.upload_page)) + self.end_headers() + self.wfile.write(self.server.upload_page) + + +class NgusHTTPServer(http.server.HTTPServer): + """A custom http.server.HTTPServer""" + def __init__(self, *arg, **kwargs): + """ + """ + self._basic_auth = kwargs.pop('basic_auth', None) + self._input_name = kwargs.pop('input_name', 'ufile') + self._upload_dir = kwargs.pop('upload_dir', pathlib.Path.cwd()) + self._upload_page = kwargs.pop('upload_page', DEFAULT_UPLOAD_PAGE) + super().__init__(*arg, **kwargs) + + @property + def basic_auth(self): + """basic_auth-property""" + return self._basic_auth + + @property + def input_name(self): + """input_name-property""" + return self._input_name + + @property + def upload_dir(self): + """upload_dir-property""" + return self._upload_dir + + @property + def upload_page(self): + """upload_page-property""" + return self._upload_page diff --git a/ngus/__main__.py b/ngus/__main__.py new file mode 100644 index 0000000..3d09dbf --- /dev/null +++ b/ngus/__main__.py @@ -0,0 +1,114 @@ +# ngus v1.0 +# Copyright (C) 2021 Simeon Simeonov + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +import argparse +import base64 +import logging +import pathlib +import sys + +import ngus + + +def eprint(*arg, **kwargs): + """stdderr print wrapper""" + print(*arg, file=sys.stderr, flush=True, **kwargs) + + +def main(inargs=None): + """main entry point""" + parser = argparse.ArgumentParser( + description='The following options are available') + parser.add_argument( + '-b', '--basic-auth', + metavar='', + type=str, + dest='basic_auth', + default='', + help=('Require Basic auth from the client in order to POST a file ' + '(default: No basic auth required)')) + parser.add_argument( + '-H', '--hostname', + metavar='', + type=str, + dest='hostname', + default='127.0.0.1', + help='ngus server IP / hostname (default: 127.0.0.1)') + parser.add_argument( + '-i', '--input-name', + metavar='', + type=str, + dest='input_name', + default='ufile', + help='The name of the form input field (default: "ufile")') + parser.add_argument( + '-p', '--port', + metavar='', + type=int, + dest='port', + default=8080, + help='ngus server port (default: 8080)') + parser.add_argument( + '-u', '--upload-dir', + metavar='', + type=pathlib.Path, + dest='upload_dir', + default=pathlib.Path.cwd(), + help='ngus server upload dir (default: CWD)') + parser.add_argument( + '-U', '--upload-page', + metavar='', + type=argparse.FileType('rb'), + dest='upload_page', + default=None, + help='Alternative upload page (form) to display (default: None)') + parser.add_argument( + '-v', '--version', + action='version', + version=f'%(prog)s {ngus.__version__}', + help='Display program-version and exit') + args = parser.parse_args(inargs) + try: + logging.basicConfig(format='%(asctime)s - %(levelname)s - %(message)s', + level=logging.DEBUG) + logger = logging.getLogger('ngus') + logger.info('ngus starting') + server_params = { + 'input_name': args.input_name, + 'upload_dir': args.upload_dir + } + if args.upload_page is not None: + server_params['upload_page'] = args.upload_page.read() + if args.basic_auth and len(args.basic_auth.split(':')) == 2: + server_params['basic_auth'] = base64.b64encode( + args.basic_auth.strip().encode('utf-8')).decode() + logger.info('Requiring basic-auth') + ngus_server = ngus.NgusHTTPServer((args.hostname, args.port), + ngus.NgusBaseHTTPRequestHandler, + **server_params) + logger.info(f'Listening on {args.hostname}:{args.port}') + logger.info('Done!') + ngus_server.serve_forever() + except KeyboardInterrupt: + print('\n\nTerminating...') + except Exception as e: + eprint(f'ngus critical error: {e}') + sys.exit(1) + sys.exit(0) + + +if __name__ == '__main__': + main() diff --git a/setup.py b/setup.py new file mode 100644 index 0000000..fbdefcb --- /dev/null +++ b/setup.py @@ -0,0 +1,46 @@ +import setuptools + +import ngus + +with open('README.md', 'r') as fh: + long_description = fh.read() + + +setuptools.setup( + name='ngus', + version=ngus.__version__, + author=ngus.__author__, + author_email='sgs@pichove.org', + description='A simple HTTP server for handleing file uploads', + long_description=long_description, + long_description_content_type='text/markdown', + url='https://github.com/blackm0re/ngus', + packages=setuptools.find_packages(), + exclude_package_data={'': ['.gitignore']}, + entry_points={ + 'console_scripts': [ + 'ngus=ngus.__main__:main', + ], + }, + classifiers=[ + 'Development Status :: 5 - Production/Stable', + 'Intended Audience :: End Users/Desktop', + ('License :: OSI Approved :: GNU General Public License v3 or later ' + '(GPLv3+)'), + 'Programming Language :: Python :: 3 :: Only', + 'Programming Language :: Python :: 3.6', + 'Programming Language :: Python :: 3.7', + 'Programming Language :: Python :: 3.8', + 'Programming Language :: Python :: 3.9', + 'Programming Language :: Python :: 3.10', + 'Programming Language :: Python :: Implementation', + 'Operating System :: OS Independent', + 'Topic :: Internet :: WWW/HTTP :: HTTP Servers' + ], + keywords='upload http httpd', + project_urls={ + 'Bug Reports': 'https://github.com/blackm0re/ngus/issues', + 'Source': 'https://github.com/blackm0re/ngus' + }, + python_requires='>=3.6', +) -- cgit v1.3