diff --git a/swh/web/common/utils.py b/swh/web/common/utils.py index 38e483de..6b8b1ae8 100644 --- a/swh/web/common/utils.py +++ b/swh/web/common/utils.py @@ -1,595 +1,600 @@ # Copyright (C) 2017-2022 The Software Heritage developers # See the AUTHORS file at the top-level directory of this distribution # License: GNU Affero General Public License version 3, or any later version # See top-level LICENSE file for more information from datetime import datetime, timezone import functools import os import re from typing import Any, Callable, Dict, List, Optional import urllib.parse from xml.etree import ElementTree from bs4 import BeautifulSoup from docutils.core import publish_parts import docutils.parsers.rst import docutils.utils from docutils.writers.html5_polyglot import HTMLTranslator, Writer from iso8601 import ParseError, parse_date from pkg_resources import get_distribution from prometheus_client.registry import CollectorRegistry import requests from requests.auth import HTTPBasicAuth import sentry_sdk from django.core.cache import cache from django.core.cache.backends.base import DEFAULT_TIMEOUT from django.http import HttpRequest, QueryDict from django.shortcuts import redirect from django.urls import resolve from django.urls import reverse as django_reverse from swh.web.auth.utils import ( ADD_FORGE_MODERATOR_PERMISSION, ADMIN_LIST_DEPOSIT_PERMISSION, MAILMAP_ADMIN_PERMISSION, ) from swh.web.common.exc import BadInputExc from swh.web.common.typing import QueryParameters from swh.web.config import SWH_WEB_SERVER_NAME, get_config, search SWH_WEB_METRICS_REGISTRY = CollectorRegistry(auto_describe=True) swh_object_icons = { "alias": "mdi mdi-star", "branch": "mdi mdi-source-branch", "branches": "mdi mdi-source-branch", "content": "mdi mdi-file-document", "cnt": "mdi mdi-file-document", "directory": "mdi mdi-folder", "dir": "mdi mdi-folder", "origin": "mdi mdi-source-repository", "ori": "mdi mdi-source-repository", "person": "mdi mdi-account", "revisions history": "mdi mdi-history", "release": "mdi mdi-tag", "rel": "mdi mdi-tag", "releases": "mdi mdi-tag", "revision": "mdi mdi-rotate-90 mdi-source-commit", "rev": "mdi mdi-rotate-90 mdi-source-commit", "snapshot": "mdi mdi-camera", "snp": "mdi mdi-camera", "visits": "mdi mdi-calendar-month", } def reverse( viewname: str, url_args: Optional[Dict[str, Any]] = None, query_params: Optional[QueryParameters] = None, current_app: Optional[str] = None, urlconf: Optional[str] = None, request: Optional[HttpRequest] = None, ) -> str: """An override of django reverse function supporting query parameters. Args: viewname: the name of the django view from which to compute a url url_args: dictionary of url arguments indexed by their names query_params: dictionary of query parameters to append to the reversed url current_app: the name of the django app tighten to the view urlconf: url configuration module request: build an absolute URI if provided Returns: str: the url of the requested view with processed arguments and query parameters """ if url_args: url_args = {k: v for k, v in url_args.items() if v is not None} url = django_reverse( viewname, urlconf=urlconf, kwargs=url_args, current_app=current_app ) if query_params: query_params = {k: v for k, v in query_params.items() if v is not None} if query_params and len(query_params) > 0: query_dict = QueryDict("", mutable=True) for k in sorted(query_params.keys()): query_dict[k] = query_params[k] url += "?" + query_dict.urlencode(safe="/;:") if request is not None: url = request.build_absolute_uri(url) return url def datetime_to_utc(date): """Returns datetime in UTC without timezone info Args: date (datetime.datetime): input datetime with timezone info Returns: datetime.datetime: datetime in UTC without timezone info """ if date.tzinfo and date.tzinfo != timezone.utc: return date.astimezone(tz=timezone.utc) else: return date def parse_iso8601_date_to_utc(iso_date: str) -> datetime: """Given an ISO 8601 datetime string, parse the result as UTC datetime. Returns: a timezone-aware datetime representing the parsed date Raises: swh.web.common.exc.BadInputExc: provided date does not respect ISO 8601 format Samples: - 2016-01-12 - 2016-01-12T09:19:12+0100 - 2007-01-14T20:34:22Z """ try: date = parse_date(iso_date) return datetime_to_utc(date) except ParseError as e: raise BadInputExc(e) def shorten_path(path): """Shorten the given path: for each hash present, only return the first 8 characters followed by an ellipsis""" sha256_re = r"([0-9a-f]{8})[0-9a-z]{56}" sha1_re = r"([0-9a-f]{8})[0-9a-f]{32}" ret = re.sub(sha256_re, r"\1...", path) return re.sub(sha1_re, r"\1...", ret) def format_utc_iso_date(iso_date, fmt="%d %B %Y, %H:%M UTC"): """Turns a string representation of an ISO 8601 datetime string to UTC and format it into a more human readable one. For instance, from the following input string: '2017-05-04T13:27:13+02:00' the following one is returned: '04 May 2017, 11:27 UTC'. Custom format string may also be provided as parameter Args: iso_date (str): a string representation of an ISO 8601 date fmt (str): optional date formatting string Returns: str: a formatted string representation of the input iso date """ if not iso_date: return iso_date date = parse_iso8601_date_to_utc(iso_date) return date.strftime(fmt) def gen_path_info(path): """Function to generate path data navigation for use with a breadcrumb in the swh web ui. For instance, from a path /folder1/folder2/folder3, it returns the following list:: [{'name': 'folder1', 'path': 'folder1'}, {'name': 'folder2', 'path': 'folder1/folder2'}, {'name': 'folder3', 'path': 'folder1/folder2/folder3'}] Args: path: a filesystem path Returns: list: a list of path data for navigation as illustrated above. """ path_info = [] if path: sub_paths = path.strip("/").split("/") path_from_root = "" for p in sub_paths: path_from_root += "/" + p path_info.append({"name": p, "path": path_from_root.strip("/")}) return path_info def parse_rst(text, report_level=2): """ Parse a reStructuredText string with docutils. Args: text (str): string with reStructuredText markups in it report_level (int): level of docutils report messages to print (1 info 2 warning 3 error 4 severe 5 none) Returns: docutils.nodes.document: a parsed docutils document """ parser = docutils.parsers.rst.Parser() components = (docutils.parsers.rst.Parser,) settings = docutils.frontend.OptionParser( components=components ).get_default_values() settings.report_level = report_level document = docutils.utils.new_document("rst-doc", settings=settings) parser.parse(text, document) return document def get_client_ip(request): """ Return the client IP address from an incoming HTTP request. Args: request (django.http.HttpRequest): the incoming HTTP request Returns: str: The client IP address """ x_forwarded_for = request.META.get("HTTP_X_FORWARDED_FOR") if x_forwarded_for: ip = x_forwarded_for.split(",")[0] else: ip = request.META.get("REMOTE_ADDR") return ip def is_swh_web_development(request: HttpRequest) -> bool: """Indicate if we are running a development version of swh-web. """ site_base_url = request.build_absolute_uri("/") return any( host in site_base_url for host in ("localhost", "127.0.0.1", "testserver") ) def is_swh_web_staging(request: HttpRequest) -> bool: """Indicate if we are running a staging version of swh-web. """ config = get_config() site_base_url = request.build_absolute_uri("/") return any( server_name in site_base_url for server_name in config["staging_server_names"] ) def is_swh_web_production(request: HttpRequest) -> bool: """Indicate if we are running the public production version of swh-web. """ return SWH_WEB_SERVER_NAME in request.build_absolute_uri("/") browsers_supported_image_mimes = set( [ "image/gif", "image/png", "image/jpeg", "image/bmp", "image/webp", "image/svg", "image/svg+xml", ] ) def context_processor(request): """ Django context processor used to inject variables in all swh-web templates. """ config = get_config() if ( hasattr(request, "user") and request.user.is_authenticated and not hasattr(request.user, "backend") ): # To avoid django.template.base.VariableDoesNotExist errors # when rendering templates when standard Django user is logged in. request.user.backend = "django.contrib.auth.backends.ModelBackend" return { "swh_object_icons": swh_object_icons, "available_languages": None, "swh_client_config": config["client_config"], "oidc_enabled": bool(config["keycloak"]["server_url"]), "browsers_supported_image_mimes": browsers_supported_image_mimes, "keycloak": config["keycloak"], "site_base_url": request.build_absolute_uri("/"), "DJANGO_SETTINGS_MODULE": os.environ["DJANGO_SETTINGS_MODULE"], "status": config["status"], "swh_web_dev": is_swh_web_development(request), "swh_web_staging": is_swh_web_staging(request), "swh_web_version": get_distribution("swh.web").version, "iframe_mode": False, "ADMIN_LIST_DEPOSIT_PERMISSION": ADMIN_LIST_DEPOSIT_PERMISSION, "ADD_FORGE_MODERATOR_PERMISSION": ADD_FORGE_MODERATOR_PERMISSION, "FEATURES": get_config()["features"], "MAILMAP_ADMIN_PERMISSION": MAILMAP_ADMIN_PERMISSION, } def resolve_branch_alias( snapshot: Dict[str, Any], branch: Optional[Dict[str, Any]] ) -> Optional[Dict[str, Any]]: """ Resolve branch alias in snapshot content. Args: snapshot: a full snapshot content branch: a branch alias contained in the snapshot Returns: The real snapshot branch that got aliased. """ while branch and branch["target_type"] == "alias": if branch["target"] in snapshot["branches"]: branch = snapshot["branches"][branch["target"]] else: from swh.web.common import archive snp = archive.lookup_snapshot( snapshot["id"], branches_from=branch["target"], branches_count=1 ) if snp and branch["target"] in snp["branches"]: branch = snp["branches"][branch["target"]] else: branch = None return branch class _NoHeaderHTMLTranslator(HTMLTranslator): """ Docutils translator subclass to customize the generation of HTML from reST-formatted docstrings """ def __init__(self, document): super().__init__(document) self.body_prefix = [] self.body_suffix = [] _HTML_WRITER = Writer() _HTML_WRITER.translator_class = _NoHeaderHTMLTranslator def rst_to_html(rst: str) -> str: """ Convert reStructuredText document into HTML. Args: rst: A string containing a reStructuredText document Returns: Body content of the produced HTML conversion. """ settings = { "initial_header_level": 2, "halt_level": 4, "traceback": True, "file_insertion_enabled": False, "raw_enabled": False, } pp = publish_parts(rst, writer=_HTML_WRITER, settings_overrides=settings) return f'
{pp["html_body"]}
' def prettify_html(html: str) -> str: """ Prettify an HTML document. Args: html: Input HTML document Returns: The prettified HTML document """ return BeautifulSoup(html, "lxml").prettify() def django_cache( timeout: int = DEFAULT_TIMEOUT, catch_exception: bool = False, exception_return_value: Any = None, invalidate_cache_pred: Callable[[Any], bool] = lambda val: False, ): """Decorator to put the result of a function call in Django cache, subsequent calls will directly return the cached value. Args: timeout: The number of seconds value will be hold in cache catch_exception: If :const:`True`, any thrown exception by the decorated function will be caught and not reraised exception_return_value: The value to return if previous parameter is set to :const:`True` invalidate_cache_pred: A predicate function enabling to invalidate the cache under certain conditions, decorated function will then be called again Returns: The returned value of the decorated function for the specified parameters """ def inner(func): @functools.wraps(func) def wrapper(*args, **kwargs): func_args = args + (0,) + tuple(sorted(kwargs.items())) cache_key = str(hash((func.__module__, func.__name__) + func_args)) ret = cache.get(cache_key) if ret is None or invalidate_cache_pred(ret): try: ret = func(*args, **kwargs) except Exception as exc: sentry_sdk.capture_exception(exc) if catch_exception: return exception_return_value else: raise else: cache.set(cache_key, ret, timeout=timeout) return ret return wrapper return inner def _deposits_list_url( deposits_list_base_url: str, page_size: int, username: Optional[str] ) -> str: params = {"page_size": str(page_size)} if username is not None: params["username"] = username return f"{deposits_list_base_url}?{urllib.parse.urlencode(params)}" def get_deposits_list(username: Optional[str] = None) -> List[Dict[str, Any]]: """Return the list of software deposits using swh-deposit API """ config = get_config()["deposit"] deposits_list_base_url = config["private_api_url"] + "deposits" deposits_list_auth = HTTPBasicAuth( config["private_api_user"], config["private_api_password"] ) deposits_list_url = _deposits_list_url( deposits_list_base_url, page_size=1, username=username ) nb_deposits = requests.get( deposits_list_url, auth=deposits_list_auth, timeout=30 ).json()["count"] @django_cache(invalidate_cache_pred=lambda data: data["count"] != nb_deposits) def _get_deposits_data(): deposits_list_url = _deposits_list_url( deposits_list_base_url, page_size=nb_deposits, username=username ) return requests.get( deposits_list_url, auth=deposits_list_auth, timeout=30, ).json() deposits_data = _get_deposits_data() return deposits_data["results"] @django_cache() def get_deposit_raw_metadata(deposit_id: int) -> Optional[str]: config = get_config()["deposit"] url = f"{config['private_api_url']}/{deposit_id}/meta" return requests.get(url).json()["raw_metadata"] +_origin_visit_types_cache_timeout = 24 * 60 * 60 # 24 hours + + +@django_cache( + timeout=_origin_visit_types_cache_timeout, + catch_exception=True, + exception_return_value=[], +) def origin_visit_types() -> List[str]: """Return the exhaustive list of visit types for origins ingested into the archive. """ - try: - return sorted(search().visit_types_count().keys()) - except Exception: - return [] + return sorted(search().visit_types_count().keys()) def redirect_to_new_route(request, new_route, permanent=True): """Redirect a request to another route with url args and query parameters eg: /origin//log?path=test can be redirected as /log?url=&path=test. This can be used to deprecate routes """ request_path = resolve(request.path_info) args = {**request_path.kwargs, **request.GET.dict()} return redirect(reverse(new_route, query_params=args), permanent=permanent,) NAMESPACES = { "swh": "https://www.softwareheritage.org/schema/2018/deposit", "schema": "http://schema.org/", } def parse_swh_metadata_provenance(raw_metadata: str) -> Optional[str]: """Parse swh metadata-provenance out of the raw metadata deposit. If found, returns the value, None otherwise. .. code-block:: xml https://example.org/metadata/url Args: raw_metadata: raw metadata out of deposits received Returns: Either the metadata provenance url if any or None otherwise """ metadata = ElementTree.fromstring(raw_metadata) url = metadata.findtext( "swh:deposit/swh:metadata-provenance/schema:url", namespaces=NAMESPACES, ) return url or None def parse_swh_deposit_origin(raw_metadata: str) -> Optional[str]: """Parses and from metadata document, if any. They are mutually exclusive and tested as such in the deposit. .. code-block:: xml .. code-block:: xml Returns: The one not null if any, None otherwise """ metadata = ElementTree.fromstring(raw_metadata) for origin_tag in ["create_origin", "add_to_origin"]: elt = metadata.find( f"swh:deposit/swh:{origin_tag}/swh:origin[@url]", namespaces=NAMESPACES ) if elt is not None: return elt.attrib["url"] return None def has_add_forge_now_permission(user) -> bool: """Is a user considered an add-forge-now moderator? Returns True if a user is staff or has add forge now moderator permission """ return user.is_staff or user.has_perm(ADD_FORGE_MODERATOR_PERMISSION)