155 lines
5 KiB
Python
155 lines
5 KiB
Python
import logging
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from functools import wraps
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from urlparse import urlparse
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from urllib import urlencode
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from flask import Blueprint, make_response, url_for, request, jsonify
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from semantic_version import Spec
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import features
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from app import app, metric_queue, get_app_url
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from auth.auth_context import get_grant_context
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from auth.permissions import (ReadRepositoryPermission, ModifyRepositoryPermission,
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AdministerRepositoryPermission)
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from auth.registry_jwt_auth import process_registry_jwt_auth, get_auth_headers
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from data import model
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from endpoints.decorators import anon_protect, anon_allowed
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from endpoints.v2.errors import V2RegistryException, Unauthorized
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from util.http import abort
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from util.registry.dockerver import docker_version
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from util.metrics.metricqueue import time_blueprint
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from util.pagination import encrypt_page_token, decrypt_page_token
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logger = logging.getLogger(__name__)
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v2_bp = Blueprint('v2', __name__)
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time_blueprint(v2_bp, metric_queue)
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_MAX_RESULTS_PER_PAGE = 50
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def _paginate(limit_kwarg_name='limit', offset_kwarg_name='offset',
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callback_kwarg_name='pagination_callback'):
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def wrapper(func):
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@wraps(func)
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def wrapped(*args, **kwargs):
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try:
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requested_limit = int(request.args.get('n', _MAX_RESULTS_PER_PAGE))
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except ValueError:
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requested_limit = 0
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limit = max(min(requested_limit, _MAX_RESULTS_PER_PAGE), 1)
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next_page_token = request.args.get('next_page', None)
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# Decrypt the next page token, if any.
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offset = 0
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page_info = decrypt_page_token(next_page_token)
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if page_info is not None:
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# Note: we use offset here instead of ID >= n because one of the V2 queries is a UNION.
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offset = page_info.get('offset', 0)
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def callback(num_results, response):
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if num_results <= limit:
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return
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next_page_token = encrypt_page_token({'offset': limit+offset})
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link = get_app_url() + url_for(request.endpoint, **request.view_args)
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link += '?%s; rel="next"' % urlencode({'n': limit, 'next_page': next_page_token})
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response.headers['Link'] = link
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kwargs[limit_kwarg_name] = limit
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kwargs[offset_kwarg_name] = offset
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kwargs[callback_kwarg_name] = callback
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func(*args, **kwargs)
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return wrapped
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return wrapper
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@v2_bp.app_errorhandler(V2RegistryException)
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def handle_registry_v2_exception(error):
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response = jsonify({
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'errors': [error.as_dict()]
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})
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response.status_code = error.http_status_code
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if response.status_code == 401:
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response.headers.extend(get_auth_headers(repository=error.repository, scopes=error.scopes))
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logger.debug('sending response: %s', response.get_data())
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return response
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def _require_repo_permission(permission_class, scopes=None, allow_public=False):
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def wrapper(func):
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@wraps(func)
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def wrapped(namespace_name, repo_name, *args, **kwargs):
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logger.debug('Checking permission %s for repo: %s/%s', permission_class,
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namespace_name, repo_name)
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permission = permission_class(namespace_name, repo_name)
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if (permission.can() or
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(allow_public and
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model.repository.repository_is_public(namespace_name, repo_name))):
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return func(namespace_name, repo_name, *args, **kwargs)
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repository = namespace_name + '/' + repo_name
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raise Unauthorized(repository=repository, scopes=scopes)
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return wrapped
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return wrapper
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require_repo_read = _require_repo_permission(ReadRepositoryPermission,
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scopes=['pull'],
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allow_public=True)
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require_repo_write = _require_repo_permission(ModifyRepositoryPermission,
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scopes=['pull', 'push'])
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require_repo_admin = _require_repo_permission(AdministerRepositoryPermission,
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scopes=['pull', 'push'])
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def get_input_stream(flask_request):
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if flask_request.headers.get('transfer-encoding') == 'chunked':
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return flask_request.environ['wsgi.input']
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return flask_request.stream
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# TODO remove when v2 is deployed everywhere
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def route_show_if(value):
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def decorator(f):
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@wraps(f)
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def decorated_function(*args, **kwargs):
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if not value:
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abort(404)
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return f(*args, **kwargs)
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return decorated_function
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return decorator
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@v2_bp.route('/')
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@route_show_if(features.ADVERTISE_V2)
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@process_registry_jwt_auth()
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@anon_allowed
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def v2_support_enabled():
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docker_ver = docker_version(request.user_agent.string)
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# Check if our version is one of the blacklisted versions, if we can't
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# identify the version (None) we will fail open and assume that it is
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# newer and therefore should not be blacklisted.
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if Spec(app.config['BLACKLIST_V2_SPEC']).match(docker_ver) and docker_ver is not None:
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abort(404)
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response = make_response('true', 200)
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if get_grant_context() is None:
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response = make_response('true', 401)
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response.headers.extend(get_auth_headers())
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return response
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from endpoints.v2 import (
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blob,
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catalog,
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manifest,
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tag,
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v2auth,
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)
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