| # -*- coding: utf-8 -*- |
| |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| # implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| import logging |
| from uuid import uuid4 |
| from http import HTTPStatus |
| from time import time |
| from osm_common.dbbase import deep_update_rfc7396 |
| from osm_nbi.validation import validate_input, ValidationError, is_valid_uuid |
| from yaml import safe_load, YAMLError |
| |
| __author__ = "Alfonso Tierno <alfonso.tiernosepulveda@telefonica.com>" |
| |
| |
| class EngineException(Exception): |
| |
| def __init__(self, message, http_code=HTTPStatus.BAD_REQUEST): |
| self.http_code = http_code |
| super(Exception, self).__init__(message) |
| |
| |
| def deep_get(target_dict, key_list): |
| """ |
| Get a value from target_dict entering in the nested keys. If keys does not exist, it returns None |
| Example target_dict={a: {b: 5}}; key_list=[a,b] returns 5; both key_list=[a,b,c] and key_list=[f,h] return None |
| :param target_dict: dictionary to be read |
| :param key_list: list of keys to read from target_dict |
| :return: The wanted value if exist, None otherwise |
| """ |
| for key in key_list: |
| if not isinstance(target_dict, dict) or key not in target_dict: |
| return None |
| target_dict = target_dict[key] |
| return target_dict |
| |
| |
| def get_iterable(input_var): |
| """ |
| Returns an iterable, in case input_var is None it just returns an empty tuple |
| :param input_var: can be a list, tuple or None |
| :return: input_var or () if it is None |
| """ |
| if input_var is None: |
| return () |
| return input_var |
| |
| |
| def versiontuple(v): |
| """utility for compare dot separate versions. Fills with zeros to proper number comparison""" |
| filled = [] |
| for point in v.split("."): |
| filled.append(point.zfill(8)) |
| return tuple(filled) |
| |
| |
| def increment_ip_mac(ip_mac, vm_index=1): |
| if not isinstance(ip_mac, str): |
| return ip_mac |
| try: |
| # try with ipv4 look for last dot |
| i = ip_mac.rfind(".") |
| if i > 0: |
| i += 1 |
| return "{}{}".format(ip_mac[:i], int(ip_mac[i:]) + vm_index) |
| # try with ipv6 or mac look for last colon. Operate in hex |
| i = ip_mac.rfind(":") |
| if i > 0: |
| i += 1 |
| # format in hex, len can be 2 for mac or 4 for ipv6 |
| return ("{}{:0" + str(len(ip_mac) - i) + "x}").format(ip_mac[:i], int(ip_mac[i:], 16) + vm_index) |
| except Exception: |
| pass |
| return None |
| |
| |
| class BaseTopic: |
| # static variables for all instance classes |
| topic = None # to_override |
| topic_msg = None # to_override |
| quota_name = None # to_override. If not provided topic will be used for quota_name |
| schema_new = None # to_override |
| schema_edit = None # to_override |
| multiproject = True # True if this Topic can be shared by several projects. Then it contains _admin.projects_read |
| |
| default_quota = 500 |
| |
| # Alternative ID Fields for some Topics |
| alt_id_field = { |
| "projects": "name", |
| "users": "username", |
| "roles": "name" |
| } |
| |
| def __init__(self, db, fs, msg, auth): |
| self.db = db |
| self.fs = fs |
| self.msg = msg |
| self.logger = logging.getLogger("nbi.engine") |
| self.auth = auth |
| |
| @staticmethod |
| def id_field(topic, value): |
| """Returns ID Field for given topic and field value""" |
| if topic in BaseTopic.alt_id_field.keys() and not is_valid_uuid(value): |
| return BaseTopic.alt_id_field[topic] |
| else: |
| return "_id" |
| |
| @staticmethod |
| def _remove_envelop(indata=None): |
| if not indata: |
| return {} |
| return indata |
| |
| def check_quota(self, session): |
| """ |
| Check whether topic quota is exceeded by the given project |
| Used by relevant topics' 'new' function to decide whether or not creation of the new item should be allowed |
| :param session[project_id]: projects (tuple) for which quota should be checked |
| :param session[force]: boolean. If true, skip quota checking |
| :return: None |
| :raise: |
| DbException if project not found |
| ValidationError if quota exceeded in one of the projects |
| """ |
| if session["force"]: |
| return |
| projects = session["project_id"] |
| for project in projects: |
| proj = self.auth.get_project(project) |
| pid = proj["_id"] |
| quota_name = self.quota_name or self.topic |
| quota = proj.get("quotas", {}).get(quota_name, self.default_quota) |
| count = self.db.count(self.topic, {"_admin.projects_read": pid}) |
| if count >= quota: |
| name = proj["name"] |
| raise ValidationError("quota ({}={}) exceeded for project {} ({})".format(quota_name, quota, name, pid), |
| http_code=HTTPStatus.UNPROCESSABLE_ENTITY) |
| |
| def _validate_input_new(self, input, force=False): |
| """ |
| Validates input user content for a new entry. It uses jsonschema. Some overrides will use pyangbind |
| :param input: user input content for the new topic |
| :param force: may be used for being more tolerant |
| :return: The same input content, or a changed version of it. |
| """ |
| if self.schema_new: |
| validate_input(input, self.schema_new) |
| return input |
| |
| def _validate_input_edit(self, input, content, force=False): |
| """ |
| Validates input user content for an edition. It uses jsonschema. Some overrides will use pyangbind |
| :param input: user input content for the new topic |
| :param force: may be used for being more tolerant |
| :return: The same input content, or a changed version of it. |
| """ |
| if self.schema_edit: |
| validate_input(input, self.schema_edit) |
| return input |
| |
| @staticmethod |
| def _get_project_filter(session): |
| """ |
| Generates a filter dictionary for querying database, so that only allowed items for this project can be |
| addressed. Only proprietary or public can be used. Allowed projects are at _admin.project_read/write. If it is |
| not present or contains ANY mean public. |
| :param session: contains: |
| project_id: project list this session has rights to access. Can be empty, one or several |
| set_project: items created will contain this project list |
| force: True or False |
| public: True, False or None |
| method: "list", "show", "write", "delete" |
| admin: True or False |
| :return: dictionary with project filter |
| """ |
| p_filter = {} |
| project_filter_n = [] |
| project_filter = list(session["project_id"]) |
| |
| if session["method"] not in ("list", "delete"): |
| if project_filter: |
| project_filter.append("ANY") |
| elif session["public"] is not None: |
| if session["public"]: |
| project_filter.append("ANY") |
| else: |
| project_filter_n.append("ANY") |
| |
| if session.get("PROJECT.ne"): |
| project_filter_n.append(session["PROJECT.ne"]) |
| |
| if project_filter: |
| if session["method"] in ("list", "show", "delete") or session.get("set_project"): |
| p_filter["_admin.projects_read.cont"] = project_filter |
| else: |
| p_filter["_admin.projects_write.cont"] = project_filter |
| if project_filter_n: |
| if session["method"] in ("list", "show", "delete") or session.get("set_project"): |
| p_filter["_admin.projects_read.ncont"] = project_filter_n |
| else: |
| p_filter["_admin.projects_write.ncont"] = project_filter_n |
| |
| return p_filter |
| |
| def check_conflict_on_new(self, session, indata): |
| """ |
| Check that the data to be inserted is valid |
| :param session: contains "username", "admin", "force", "public", "project_id", "set_project" |
| :param indata: data to be inserted |
| :return: None or raises EngineException |
| """ |
| pass |
| |
| def check_conflict_on_edit(self, session, final_content, edit_content, _id): |
| """ |
| Check that the data to be edited/uploaded is valid |
| :param session: contains "username", "admin", "force", "public", "project_id", "set_project" |
| :param final_content: data once modified. This method may change it. |
| :param edit_content: incremental data that contains the modifications to apply |
| :param _id: internal _id |
| :return: None or raises EngineException |
| """ |
| if not self.multiproject: |
| return |
| # Change public status |
| if session["public"] is not None: |
| if session["public"] and "ANY" not in final_content["_admin"]["projects_read"]: |
| final_content["_admin"]["projects_read"].append("ANY") |
| final_content["_admin"]["projects_write"].clear() |
| if not session["public"] and "ANY" in final_content["_admin"]["projects_read"]: |
| final_content["_admin"]["projects_read"].remove("ANY") |
| |
| # Change project status |
| if session.get("set_project"): |
| for p in session["set_project"]: |
| if p not in final_content["_admin"]["projects_read"]: |
| final_content["_admin"]["projects_read"].append(p) |
| |
| def check_unique_name(self, session, name, _id=None): |
| """ |
| Check that the name is unique for this project |
| :param session: contains "username", "admin", "force", "public", "project_id", "set_project" |
| :param name: name to be checked |
| :param _id: If not None, ignore this entry that are going to change |
| :return: None or raises EngineException |
| """ |
| if not self.multiproject: |
| _filter = {} |
| else: |
| _filter = self._get_project_filter(session) |
| _filter["name"] = name |
| if _id: |
| _filter["_id.neq"] = _id |
| if self.db.get_one(self.topic, _filter, fail_on_empty=False, fail_on_more=False): |
| raise EngineException("name '{}' already exists for {}".format(name, self.topic), HTTPStatus.CONFLICT) |
| |
| @staticmethod |
| def format_on_new(content, project_id=None, make_public=False): |
| """ |
| Modifies content descriptor to include _admin |
| :param content: descriptor to be modified |
| :param project_id: if included, it add project read/write permissions. Can be None or a list |
| :param make_public: if included it is generated as public for reading. |
| :return: op_id: operation id on asynchronous operation, None otherwise. In addition content is modified |
| """ |
| now = time() |
| if "_admin" not in content: |
| content["_admin"] = {} |
| if not content["_admin"].get("created"): |
| content["_admin"]["created"] = now |
| content["_admin"]["modified"] = now |
| if not content.get("_id"): |
| content["_id"] = str(uuid4()) |
| if project_id is not None: |
| if not content["_admin"].get("projects_read"): |
| content["_admin"]["projects_read"] = list(project_id) |
| if make_public: |
| content["_admin"]["projects_read"].append("ANY") |
| if not content["_admin"].get("projects_write"): |
| content["_admin"]["projects_write"] = list(project_id) |
| return None |
| |
| @staticmethod |
| def format_on_edit(final_content, edit_content): |
| """ |
| Modifies final_content to admin information upon edition |
| :param final_content: final content to be stored at database |
| :param edit_content: user requested update content |
| :return: operation id, if this edit implies an asynchronous operation; None otherwise |
| """ |
| if final_content.get("_admin"): |
| now = time() |
| final_content["_admin"]["modified"] = now |
| return None |
| |
| def _send_msg(self, action, content, not_send_msg=None): |
| if self.topic_msg and not_send_msg is not False: |
| content.pop("_admin", None) |
| if isinstance(not_send_msg, list): |
| not_send_msg.append((self.topic_msg, action, content)) |
| else: |
| self.msg.write(self.topic_msg, action, content) |
| |
| def check_conflict_on_del(self, session, _id, db_content): |
| """ |
| Check if deletion can be done because of dependencies if it is not force. To override |
| :param session: contains "username", "admin", "force", "public", "project_id", "set_project" |
| :param _id: internal _id |
| :param db_content: The database content of this item _id |
| :return: None if ok or raises EngineException with the conflict |
| """ |
| pass |
| |
| @staticmethod |
| def _update_input_with_kwargs(desc, kwargs, yaml_format=False): |
| """ |
| Update descriptor with the kwargs. It contains dot separated keys |
| :param desc: dictionary to be updated |
| :param kwargs: plain dictionary to be used for updating. |
| :param yaml_format: get kwargs values as yaml format. |
| :return: None, 'desc' is modified. It raises EngineException. |
| """ |
| if not kwargs: |
| return |
| try: |
| for k, v in kwargs.items(): |
| update_content = desc |
| kitem_old = None |
| klist = k.split(".") |
| for kitem in klist: |
| if kitem_old is not None: |
| update_content = update_content[kitem_old] |
| if isinstance(update_content, dict): |
| kitem_old = kitem |
| if not isinstance(update_content.get(kitem_old), (dict, list)): |
| update_content[kitem_old] = {} |
| elif isinstance(update_content, list): |
| # key must be an index of the list, must be integer |
| kitem_old = int(kitem) |
| # if index greater than list, extend the list |
| if kitem_old >= len(update_content): |
| update_content += [None] * (kitem_old - len(update_content) + 1) |
| if not isinstance(update_content[kitem_old], (dict, list)): |
| update_content[kitem_old] = {} |
| else: |
| raise EngineException( |
| "Invalid query string '{}'. Descriptor is not a list nor dict at '{}'".format(k, kitem)) |
| if v is None: |
| del update_content[kitem_old] |
| else: |
| update_content[kitem_old] = v if not yaml_format else safe_load(v) |
| except KeyError: |
| raise EngineException( |
| "Invalid query string '{}'. Descriptor does not contain '{}'".format(k, kitem_old)) |
| except ValueError: |
| raise EngineException("Invalid query string '{}'. Expected integer index list instead of '{}'".format( |
| k, kitem)) |
| except IndexError: |
| raise EngineException( |
| "Invalid query string '{}'. Index '{}' out of range".format(k, kitem_old)) |
| except YAMLError: |
| raise EngineException("Invalid query string '{}' yaml format".format(k)) |
| |
| def sol005_projection(self, data): |
| # Projection was moved to child classes |
| return data |
| |
| def show(self, session, _id, api_req=False): |
| """ |
| Get complete information on an topic |
| :param session: contains "username", "admin", "force", "public", "project_id", "set_project" |
| :param _id: server internal id |
| :param api_req: True if this call is serving an external API request. False if serving internal request. |
| :return: dictionary, raise exception if not found. |
| """ |
| if not self.multiproject: |
| filter_db = {} |
| else: |
| filter_db = self._get_project_filter(session) |
| # To allow project&user addressing by name AS WELL AS _id |
| filter_db[BaseTopic.id_field(self.topic, _id)] = _id |
| data = self.db.get_one(self.topic, filter_db) |
| |
| # Only perform SOL005 projection if we are serving an external request |
| if api_req: |
| self.sol005_projection(data) |
| |
| return data |
| |
| # TODO transform data for SOL005 URL requests |
| # TODO remove _admin if not admin |
| |
| def get_file(self, session, _id, path=None, accept_header=None): |
| """ |
| Only implemented for descriptor topics. Return the file content of a descriptor |
| :param session: contains "username", "admin", "force", "public", "project_id", "set_project" |
| :param _id: Identity of the item to get content |
| :param path: artifact path or "$DESCRIPTOR" or None |
| :param accept_header: Content of Accept header. Must contain applition/zip or/and text/plain |
| :return: opened file or raises an exception |
| """ |
| raise EngineException("Method get_file not valid for this topic", HTTPStatus.INTERNAL_SERVER_ERROR) |
| |
| def list(self, session, filter_q=None, api_req=False): |
| """ |
| Get a list of the topic that matches a filter |
| :param session: contains the used login username and working project |
| :param filter_q: filter of data to be applied |
| :param api_req: True if this call is serving an external API request. False if serving internal request. |
| :return: The list, it can be empty if no one match the filter. |
| """ |
| if not filter_q: |
| filter_q = {} |
| if self.multiproject: |
| filter_q.update(self._get_project_filter(session)) |
| |
| # TODO transform data for SOL005 URL requests. Transform filtering |
| # TODO implement "field-type" query string SOL005 |
| data = self.db.get_list(self.topic, filter_q) |
| |
| # Only perform SOL005 projection if we are serving an external request |
| if api_req: |
| data = [self.sol005_projection(inst) for inst in data] |
| |
| return data |
| |
| def new(self, rollback, session, indata=None, kwargs=None, headers=None): |
| """ |
| Creates a new entry into database. |
| :param rollback: list to append created items at database in case a rollback may to be done |
| :param session: contains "username", "admin", "force", "public", "project_id", "set_project" |
| :param indata: data to be inserted |
| :param kwargs: used to override the indata descriptor |
| :param headers: http request headers |
| :return: _id, op_id: |
| _id: identity of the inserted data. |
| op_id: operation id if this is asynchronous, None otherwise |
| """ |
| try: |
| if self.multiproject: |
| self.check_quota(session) |
| |
| content = self._remove_envelop(indata) |
| |
| # Override descriptor with query string kwargs |
| self._update_input_with_kwargs(content, kwargs) |
| content = self._validate_input_new(content, force=session["force"]) |
| self.check_conflict_on_new(session, content) |
| op_id = self.format_on_new(content, project_id=session["project_id"], make_public=session["public"]) |
| _id = self.db.create(self.topic, content) |
| rollback.append({"topic": self.topic, "_id": _id}) |
| if op_id: |
| content["op_id"] = op_id |
| self._send_msg("created", content) |
| return _id, op_id |
| except ValidationError as e: |
| raise EngineException(e, HTTPStatus.UNPROCESSABLE_ENTITY) |
| |
| def upload_content(self, session, _id, indata, kwargs, headers): |
| """ |
| Only implemented for descriptor topics. Used for receiving content by chunks (with a transaction_id header |
| and/or gzip file. It will store and extract) |
| :param session: contains "username", "admin", "force", "public", "project_id", "set_project" |
| :param _id : the database id of entry to be updated |
| :param indata: http body request |
| :param kwargs: user query string to override parameters. NOT USED |
| :param headers: http request headers |
| :return: True package has is completely uploaded or False if partial content has been uplodaed. |
| Raise exception on error |
| """ |
| raise EngineException("Method upload_content not valid for this topic", HTTPStatus.INTERNAL_SERVER_ERROR) |
| |
| def delete_list(self, session, filter_q=None): |
| """ |
| Delete a several entries of a topic. This is for internal usage and test only, not exposed to NBI API |
| :param session: contains "username", "admin", "force", "public", "project_id", "set_project" |
| :param filter_q: filter of data to be applied |
| :return: The deleted list, it can be empty if no one match the filter. |
| """ |
| # TODO add admin to filter, validate rights |
| if not filter_q: |
| filter_q = {} |
| if self.multiproject: |
| filter_q.update(self._get_project_filter(session)) |
| return self.db.del_list(self.topic, filter_q) |
| |
| def delete_extra(self, session, _id, db_content, not_send_msg=None): |
| """ |
| Delete other things apart from database entry of a item _id. |
| e.g.: other associated elements at database and other file system storage |
| :param session: contains "username", "admin", "force", "public", "project_id", "set_project" |
| :param _id: server internal id |
| :param db_content: The database content of the _id. It is already deleted when reached this method, but the |
| content is needed in same cases |
| :param not_send_msg: To not send message (False) or store content (list) instead |
| :return: None if ok or raises EngineException with the problem |
| """ |
| pass |
| |
| def delete(self, session, _id, dry_run=False, not_send_msg=None): |
| """ |
| Delete item by its internal _id |
| :param session: contains "username", "admin", "force", "public", "project_id", "set_project" |
| :param _id: server internal id |
| :param dry_run: make checking but do not delete |
| :param not_send_msg: To not send message (False) or store content (list) instead |
| :return: operation id (None if there is not operation), raise exception if error or not found, conflict, ... |
| """ |
| |
| # To allow addressing projects and users by name AS WELL AS by _id |
| if not self.multiproject: |
| filter_q = {} |
| else: |
| filter_q = self._get_project_filter(session) |
| filter_q[self.id_field(self.topic, _id)] = _id |
| item_content = self.db.get_one(self.topic, filter_q) |
| |
| self.check_conflict_on_del(session, _id, item_content) |
| if dry_run: |
| return None |
| |
| if self.multiproject and session["project_id"]: |
| # remove reference from project_read if there are more projects referencing it. If it last one, |
| # do not remove reference, but delete |
| other_projects_referencing = next((p for p in item_content["_admin"]["projects_read"] |
| if p not in session["project_id"] and p != "ANY"), None) |
| |
| # check if there are projects referencing it (apart from ANY, that means, public).... |
| if other_projects_referencing: |
| # remove references but not delete |
| update_dict_pull = {"_admin.projects_read": session["project_id"], |
| "_admin.projects_write": session["project_id"]} |
| self.db.set_one(self.topic, filter_q, update_dict=None, pull_list=update_dict_pull) |
| return None |
| else: |
| can_write = next((p for p in item_content["_admin"]["projects_write"] if p == "ANY" or |
| p in session["project_id"]), None) |
| if not can_write: |
| raise EngineException("You have not write permission to delete it", |
| http_code=HTTPStatus.UNAUTHORIZED) |
| |
| # delete |
| self.db.del_one(self.topic, filter_q) |
| self.delete_extra(session, _id, item_content, not_send_msg=not_send_msg) |
| self._send_msg("deleted", {"_id": _id}, not_send_msg=not_send_msg) |
| return None |
| |
| def edit(self, session, _id, indata=None, kwargs=None, content=None): |
| """ |
| Change the content of an item |
| :param session: contains "username", "admin", "force", "public", "project_id", "set_project" |
| :param _id: server internal id |
| :param indata: contains the changes to apply |
| :param kwargs: modifies indata |
| :param content: original content of the item |
| :return: op_id: operation id if this is processed asynchronously, None otherwise |
| """ |
| indata = self._remove_envelop(indata) |
| |
| # Override descriptor with query string kwargs |
| if kwargs: |
| self._update_input_with_kwargs(indata, kwargs) |
| try: |
| if indata and session.get("set_project"): |
| raise EngineException("Cannot edit content and set to project (query string SET_PROJECT) at same time", |
| HTTPStatus.UNPROCESSABLE_ENTITY) |
| |
| # TODO self._check_edition(session, indata, _id, force) |
| if not content: |
| content = self.show(session, _id) |
| |
| indata = self._validate_input_edit(indata, content, force=session["force"]) |
| |
| deep_update_rfc7396(content, indata) |
| |
| # To allow project addressing by name AS WELL AS _id. Get the _id, just in case the provided one is a name |
| _id = content.get("_id") or _id |
| |
| self.check_conflict_on_edit(session, content, indata, _id=_id) |
| op_id = self.format_on_edit(content, indata) |
| |
| self.db.replace(self.topic, _id, content) |
| |
| indata.pop("_admin", None) |
| if op_id: |
| indata["op_id"] = op_id |
| indata["_id"] = _id |
| self._send_msg("edited", indata) |
| return op_id |
| except ValidationError as e: |
| raise EngineException(e, HTTPStatus.UNPROCESSABLE_ENTITY) |