commit c54898da7a10ffbccb53ca1d29ebaa63f84a1823 Author: Jan Philipp Timme Date: Fri Nov 18 14:12:55 2016 +0100 Initial import diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..3446fb0 --- /dev/null +++ b/.gitignore @@ -0,0 +1,4 @@ +venv +__pycache__/ + +*.egg-info diff --git a/README.md b/README.md new file mode 100644 index 0000000..2e85aa3 --- /dev/null +++ b/README.md @@ -0,0 +1,13 @@ +This is a simple file storage and permanent archive service. +It allows people to drop off files which are then assigned a uuid to link to. + +=Install dependencies= + +export VENV=/path/to/venv +python3 -m venv $VENV +$VENV/bin/pip install -e . + +=Run the application stand-alone= + +$VENV/bin/pserve settings.ini --reload + diff --git a/filestorage/__init__.py b/filestorage/__init__.py new file mode 100644 index 0000000..7cff5cc --- /dev/null +++ b/filestorage/__init__.py @@ -0,0 +1,61 @@ +import os +import shelve + +from wsgiref.simple_server import make_server +from pyramid.config import Configurator + + +""" +Main entrance point that returns a wsgi application +""" +def main(global_config, **settings): + config = Configurator(settings=settings) + + # Home view when visiting the app on / + config.add_route('home', '/') + + # REST-API view behind /files + config.add_route('files', '/files') + config.add_route('files_uuid', '/files/{file_id}') + config.add_route('file_details', '/files/{file_id}/info') + config.add_route('file_uuid_key', '/files/{file_id}/{file_key}') + + # Route for static files + config.add_static_view(name='static', path='filestorage:static') + + # Add pyramid_jinja2 module to app config for web_views + config.include('pyramid_jinja2') + + # Do a config scan to get all the views + config.scan() + + # Make sure the infrastructure (folders, database) are set up + setup_infrastructure(config.registry.settings) + + # Finally build and return the app + app = config.make_wsgi_app() + return app + + +""" +Checkup routine to make sure folders and database are fine +""" +def setup_infrastructure(settings): + # Check temp folder + tmp_folder = settings['path_tmp'] + if not os.path.exists(tmp_folder): + os.makedirs(tmp_folder) + if not os.access(tmp_folder, os.W_OK): + raise PermissionError('Unable to write to temporary folder: %s' % tmp_folder) + # Check file storage folder + path_file_storage = settings['path_file_storage'] + if not os.path.exists(path_file_storage): + os.makedirs(path_file_storage) + if not os.access(path_file_storage, os.W_OK): + raise PermissionError('Unable to write to file storage folder: %s' % path_file_storage) + # Make sure shelve database works (and exists) + path_database = settings['path_database'] + db = shelve.open(path_database, flag='c') + db.close() + pass + diff --git a/filestorage/api_views.py b/filestorage/api_views.py new file mode 100644 index 0000000..6eebd19 --- /dev/null +++ b/filestorage/api_views.py @@ -0,0 +1,134 @@ +import datetime +import hashlib +import os +import shelve +import shutil +import uuid + +from pyramid.view import view_defaults +from pyramid.view import view_config +from pyramid.response import Response, FileResponse + + +""" +This REST API provides a file resource to upload, update, download +and delete files. +""" +@view_defaults(route_name='files', renderer='json') +class RESTView(object): + def __init__(self, request): + self.request = request + self.path_db = request.registry.settings['path_database'] + self.path_tmp = request.registry.settings['path_tmp'] + self.path_file_storage = request.registry.settings['path_file_storage'] + + def db_fetch_file(self, file_id): + with shelve.open(self.path_db, flag='r') as db: + if file_id not in db: + raise LookupError('File with uuid %s does not exist!' % uuid) + else: + return db[file_id] + + def db_add_file(self, file_id, data): + with shelve.open(self.path_db, flag='w') as db: + if file_id in db: + raise Error('File with uuid %s already exists!' % uuid) + else: + db[file_id] = data + + def db_update_file(self, file_id, data): + with shelve.open(self.path_db, flag='w') as db: + if file_id not in db: + raise LookupError('File with uuid %s does not exist, cannot update!' % uuid) + else: + db[file_id] = data + + def db_delete_file(self, file_id): + with shelve.open(self.path_db, flag='w') as db: + if file_id in db: + del db[file_id] + else: + raise LookupError('File with uuid %s does not exist, cannot delete!' % uuid) + + """ + Helper method to calculate hash of file + """ + def hash_file(self, filename, hasher): + BLOCKSIZE = 65536 + with open(filename, 'rb') as infile: + buf = infile.read(BLOCKSIZE) + while len(buf) > 0: + hasher.update(buf) + buf = infile.read(BLOCKSIZE) + return hasher.hexdigest() + + @view_config(request_method='PUT') + def put(self): + try: + # Create a fresh uuid for the new file + file_id = str(uuid.uuid4()) + # Use PUT /files to create a new file + input_file = self.request.POST['file'].file + # Write the data into a temporary file + temp_file_path = os.path.join(self.path_tmp, '%s' % file_id) + '~' + input_file.seek(0) + with open(temp_file_path, 'wb') as output_file: + shutil.copyfileobj(input_file, output_file) + # Now that we know the file has been fully saved to disk move it into place. + target_file_path = os.path.join(self.path_file_storage, '%s' % file_id) + os.rename(temp_file_path, target_file_path) + # Calculate file hash + filehash_md5 = self.hash_file(target_file_path, hashlib.md5()) + filehash_sha1 = self.hash_file(target_file_path, hashlib.sha1()) + filehash_sha256 = self.hash_file(target_file_path, hashlib.sha256()) + # Gather all data about the file + file_data = dict(uuid=file_id,name=self.request.POST['file'].filename, key=str(uuid.uuid4()), create_utc=str(datetime.datetime.utcnow()), sha256=filehash_sha256, sha1=filehash_sha1, md5=filehash_md5) + # Store file data in database + self.db_add_file(file_id, file_data) + # Hopefully everything worked out, so return the data from the file + return file_data + except: + return dict(success=False) + + @view_config(request_method='GET', route_name='files_uuid') + def get(self): + # Use GET /files/ to retrieve the file + file_id = self.request.matchdict['file_id'] + try: + file_data = self.db_fetch_file(file_id) + external_filename = file_data['name'] + file_response = FileResponse(os.path.join(self.path_file_storage, '%s' % file_id)) + file_response.content_disposition = 'attachment; filename=%s' % external_filename + return file_response + except: + return dict(success=False) + + @view_config(request_method='GET', route_name='file_details') + def get_info(self): + # Use GET /files//info to get file details + file_id = self.request.matchdict['file_id'] + try: + file_data = self.db_fetch_file(file_id) + del file_data['key'] # Remove the secret key only the creator is supposed to know + return file_data + except: + return dict(success=False) + + @view_config(request_method='DELETE', route_name='file_uuid_key') + def delete(self): + # Use DELETE /files// to delete file + file_id = self.request.matchdict['file_id'] + file_key = self.request.matchdict['file_key'] + try: + file_data = self.db_fetch_file(file_id) + except: + return dict(success=False) + if file_data['key'] == file_key: + # Delete file and db entry + file_path = os.path.join(self.path_file_storage, '%s' % file_id) + os.remove(file_path) + self.db_delete_file(file_id) + return dict(success=True) + else: + return dict(success=False) + diff --git a/filestorage/static/app.css b/filestorage/static/app.css new file mode 100644 index 0000000..155f032 --- /dev/null +++ b/filestorage/static/app.css @@ -0,0 +1,4 @@ +body { + margin: 2em; + font-family: sans-serif; +} diff --git a/filestorage/static/app.js b/filestorage/static/app.js new file mode 100644 index 0000000..df919dc --- /dev/null +++ b/filestorage/static/app.js @@ -0,0 +1 @@ +# TODO: Implement the jQuery REST API client! \ No newline at end of file diff --git a/filestorage/static/jquery-3.1.1.min.js 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Welcome!

+

+ This site enables users to upload files for temporary or permanent access. + Since the PUT method of the API is used to upload files, please enable javascript. +

+

+ Use this command to upload a file using curl: + 

curl {{ request.route_url('files') }} -X PUT -F "file=@/path/to/your/file"
+

+

+ Use this form to upload a file! (TODO: Implement with jQuery, properly display results) +

+ + + +
+

+ + diff --git a/filestorage/web_views.py b/filestorage/web_views.py new file mode 100644 index 0000000..39e58f2 --- /dev/null +++ b/filestorage/web_views.py @@ -0,0 +1,44 @@ +import cgi + +from pyramid.httpexceptions import HTTPFound +from pyramid.response import Response +from pyramid.view import view_config + + +@view_config(route_name='home', renderer='templates/home.jinja2') +def home_view(request): + return dict() + # This is how params can be passed to the renderer + #return dict(name=request.matchdict['name']) + +""" +# /howdy?name=alice which links to the next view +@view_config(route_name='hello') +def hello_view(request): + name = request.params.get('name', 'No Name') + body = '

Hi %s, this redirects

' + # cgi.escape to prevent Cross-Site Scripting (XSS) [CWE 79] + return Response(body % cgi.escape(name)) + + +# /goto which issues HTTP redirect to the last view +@view_config(route_name='redirect') +def redirect_view(request): + return HTTPFound(location="/problem") + + +# /problem which causes a site error +@view_config(route_name='exception') +def exception_view(request): + raise Exception() + +# /get which shows a file by its uuid +@view_config(route_name='get_file') +def get_file_view(request): + body = 'Param: $(uuid)' % request.matchdict + return Response(body) + +view_config(route_name='home', renderer='json') +def hello_json(request): + return [1, 2, 3] +""" diff --git a/settings.ini b/settings.ini new file mode 100644 index 0000000..d9b39d7 --- /dev/null +++ b/settings.ini @@ -0,0 +1,10 @@ +[app:main] +use = egg:filestorage +path_tmp = /tmp +path_file_storage = /tmp/bucket +path_database = /tmp/filestorage.shelve + +[server:main] +use = egg:pyramid#wsgiref +host = 127.0.0.1 +port = 6543 diff --git a/setup.py b/setup.py new file mode 100644 index 0000000..0a54de0 --- /dev/null +++ b/setup.py @@ -0,0 +1,14 @@ +from setuptools import setup + +requires = [ + 'pyramid', + 'pyramid_jinja2', +] + +setup(name='filestorage', + install_requires=requires, + entry_points="""\ + [paste.app_factory] + main = filestorage:main + """, +) \ No newline at end of file