mirror of
https://github.com/squidfunk/mkdocs-material.git
synced 2024-12-16 17:35:59 +01:00
551 lines
22 KiB
Python
551 lines
22 KiB
Python
# Copyright (c) 2016-2023 Martin Donath <martin.donath@squidfunk.com>
|
|
|
|
# Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
# of this software and associated documentation files (the "Software"), to
|
|
# deal in the Software without restriction, including without limitation the
|
|
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
# sell copies of the Software, and to permit persons to whom the Software is
|
|
# furnished to do so, subject to the following conditions:
|
|
|
|
# The above copyright notice and this permission notice shall be included in
|
|
# all copies or substantial portions of the Software.
|
|
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
|
|
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
# IN THE SOFTWARE.
|
|
|
|
from __future__ import annotations
|
|
|
|
import errno
|
|
import logging
|
|
import os
|
|
import posixpath
|
|
import re
|
|
import requests
|
|
import sys
|
|
|
|
from colorama import Fore, Style
|
|
from concurrent.futures import Future, ThreadPoolExecutor, wait
|
|
from hashlib import sha1
|
|
from mkdocs.config.config_options import ExtraScriptValue
|
|
from mkdocs.config.defaults import MkDocsConfig
|
|
from mkdocs.plugins import BasePlugin, event_priority
|
|
from mkdocs.structure.files import File, Files
|
|
from mkdocs.utils import is_error_template
|
|
from re import Match
|
|
from urllib.parse import ParseResult as URL, urlparse
|
|
from xml.etree.ElementTree import Element, tostring
|
|
|
|
from .config import PrivacyConfig
|
|
from .parser import FragmentParser
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# Classes
|
|
# -----------------------------------------------------------------------------
|
|
|
|
# Privacy plugin
|
|
class PrivacyPlugin(BasePlugin[PrivacyConfig]):
|
|
|
|
# Initialize thread pools and asset collections
|
|
def on_config(self, config):
|
|
self.site = urlparse(config.site_url or "")
|
|
if not self.config.enabled:
|
|
return
|
|
|
|
# Initialize thread pool
|
|
self.pool = ThreadPoolExecutor(self.config.concurrency)
|
|
self.pool_jobs: list[Future] = []
|
|
|
|
# Initialize collections of external assets
|
|
self.assets = Files([])
|
|
self.assets_expr_map = {
|
|
".css": r"url\((\s*http?[^)]+)\)",
|
|
".js": r"[\"'](http[^\"']+\.(?:css|js(?:on)?))[\"']",
|
|
**self.config.assets_expr_map
|
|
}
|
|
|
|
# Process external style sheets and scripts (run latest) - run this after
|
|
# all other plugins, so they can add additional assets
|
|
@event_priority(-100)
|
|
def on_files(self, files, *, config):
|
|
if not self.config.enabled:
|
|
return
|
|
|
|
# Skip if external assets must not be processed
|
|
if not self.config.assets:
|
|
return
|
|
|
|
# Find all external style sheet and script files that are provided as
|
|
# part of the build (= already known to MkDocs on startup)
|
|
for initiator in files.media_files():
|
|
file = None
|
|
|
|
# Check if the file has dependent external assets that must be
|
|
# downloaded. Create and enqueue a job for each external asset.
|
|
for url in self._parse_media(initiator):
|
|
if not self._is_excluded(url, initiator):
|
|
file = self._queue(url, config, concurrent = True)
|
|
|
|
# If site URL is not given, ensure that Mermaid.js is always
|
|
# present. This is a special case, as Material for MkDocs
|
|
# automatically loads Mermaid.js when a Mermaid diagram is
|
|
# found in the page - https://bit.ly/36tZXsA.
|
|
if "mermaid.min.js" in url.path and not config.site_url:
|
|
path = url.geturl()
|
|
if path not in config.extra_javascript:
|
|
config.extra_javascript.append(
|
|
ExtraScriptValue(path)
|
|
)
|
|
|
|
# The local asset references at least one external asset, which
|
|
# means we must download and replace them later
|
|
if file:
|
|
self.assets.append(initiator)
|
|
files.remove(initiator)
|
|
|
|
# Process external style sheet files
|
|
for path in config.extra_css:
|
|
url = urlparse(path)
|
|
if not self._is_excluded(url):
|
|
self._queue(url, config, concurrent = True)
|
|
|
|
# Process external script files
|
|
for script in config.extra_javascript:
|
|
if isinstance(script, str):
|
|
script = ExtraScriptValue(script)
|
|
|
|
# Enqueue a job if the script needs to downloaded
|
|
url = urlparse(script.path)
|
|
if not self._is_excluded(url):
|
|
self._queue(url, config, concurrent = True)
|
|
|
|
# Process external images in page (run latest) - this stage is the earliest
|
|
# we can start processing external images, since images are the most common
|
|
# type of external asset when writing. Thus, we create and enqueue a job for
|
|
# each image we find that checks if the image needs to be downloaded.
|
|
@event_priority(-100)
|
|
def on_page_content(self, html, *, page, config, files):
|
|
if not self.config.enabled:
|
|
return
|
|
|
|
# Skip if external assets must not be processed
|
|
if not self.config.assets:
|
|
return
|
|
|
|
# Find all external images and download them if not excluded
|
|
for match in re.findall(
|
|
r"<img[^>]+src=['\"]?http[^>]+>",
|
|
html, flags = re.I | re.M
|
|
):
|
|
el = self._parse_fragment(match)
|
|
|
|
# Create and enqueue job to fetch external image
|
|
url = urlparse(el.get("src"))
|
|
if not self._is_excluded(url, page.file):
|
|
self._queue(url, config, concurrent = True)
|
|
|
|
# Process external assets in template (run later)
|
|
@event_priority(-50)
|
|
def on_post_template(self, output_content, *, template_name, config):
|
|
if not self.config.enabled:
|
|
return
|
|
|
|
# Skip sitemap.xml and other non-HTML files
|
|
if not template_name.endswith(".html"):
|
|
return
|
|
|
|
# Parse and replace links to external assets in template
|
|
initiator = File(template_name, config.docs_dir, config.site_dir, False)
|
|
return self._parse_html(output_content, initiator, config)
|
|
|
|
# Process external assets in page (run later)
|
|
@event_priority(-50)
|
|
def on_post_page(self, output, *, page, config):
|
|
if not self.config.enabled:
|
|
return
|
|
|
|
# Parse and replace links to external assets
|
|
return self._parse_html(output, page.file, config)
|
|
|
|
# Reconcile jobs (run earlier)
|
|
@event_priority(50)
|
|
def on_post_build(self, *, config):
|
|
if not self.config.enabled:
|
|
return
|
|
|
|
# Reconcile concurrent jobs and clear thread pool, as we will reuse the
|
|
# same thread pool for patching all links to external assets
|
|
wait(self.pool_jobs)
|
|
self.pool_jobs.clear()
|
|
|
|
# Spawn concurrent job to patch all links to dependent external asset
|
|
# in all style sheet and script files
|
|
for file in self.assets:
|
|
_, extension = posixpath.splitext(file.dest_uri)
|
|
if extension in [".css", ".js"]:
|
|
self.pool_jobs.append(self.pool.submit(
|
|
self._patch, file
|
|
))
|
|
|
|
# Otherwise just copy external asset to output directory
|
|
else:
|
|
file.copy_file()
|
|
|
|
# Reconcile concurrent jobs for the last time, so the plugins following
|
|
# in the build process always have a consistent state to work with
|
|
wait(self.pool_jobs)
|
|
self.pool.shutdown()
|
|
|
|
# -------------------------------------------------------------------------
|
|
|
|
# Check if the given URL is external
|
|
def _is_external(self, url: URL):
|
|
hostname = url.hostname or self.site.hostname
|
|
return hostname != self.site.hostname
|
|
|
|
# Check if the given URL is excluded
|
|
def _is_excluded(self, url: URL, initiator: File | None = None):
|
|
if not self._is_external(url):
|
|
return True
|
|
|
|
# Skip if external assets must not be processed
|
|
if not self.config.assets:
|
|
return True
|
|
|
|
# If initiator is given, format for printing
|
|
via = ""
|
|
if initiator:
|
|
via = "".join([
|
|
Fore.WHITE, Style.DIM,
|
|
f"in '{initiator.src_uri}' ",
|
|
Style.RESET_ALL
|
|
])
|
|
|
|
# Print warning if fetching is not enabled
|
|
if not self.config.assets_fetch:
|
|
log.warning(f"External file: {url.geturl()} {via}")
|
|
return True
|
|
|
|
# File is not excluded
|
|
return False
|
|
|
|
# -------------------------------------------------------------------------
|
|
|
|
# Parse a fragment
|
|
def _parse_fragment(self, fragment: str):
|
|
parser = FragmentParser()
|
|
parser.feed(fragment)
|
|
parser.close()
|
|
|
|
# Return element
|
|
assert isinstance(parser.result, Element)
|
|
return parser.result
|
|
|
|
# Parse and extract all external assets from a media file using a preset
|
|
# regular expression, and return all URLs found.
|
|
def _parse_media(self, initiator: File) -> "list[URL]":
|
|
_, extension = posixpath.splitext(initiator.dest_uri)
|
|
if extension not in self.assets_expr_map:
|
|
return []
|
|
|
|
# Find and extract all external asset URLs
|
|
expr = re.compile(self.assets_expr_map[extension], flags = re.I | re.M)
|
|
with open(initiator.abs_src_path, encoding = "utf-8") as f:
|
|
return [urlparse(url) for url in re.findall(expr, f.read())]
|
|
|
|
# Parse template or page HTML and find all external links that need to be
|
|
# replaced. Many of the assets should already be downloaded earlier, i.e.,
|
|
# everything that was directly referenced in the document, but there may
|
|
# still exist external assets that were added by third-party plugins.
|
|
def _parse_html(self, output: str, initiator: File, config: MkDocsConfig):
|
|
|
|
# Resolve callback
|
|
def resolve(file: File):
|
|
if is_error_template(initiator.src_uri):
|
|
base = urlparse(config.site_url or "/")
|
|
return posixpath.join(base.path, file.url)
|
|
else:
|
|
return file.url_relative_to(initiator)
|
|
|
|
# Replace callback
|
|
def replace(match: Match):
|
|
el = self._parse_fragment(match.group())
|
|
|
|
# Handle external style sheet or preconnect hint
|
|
if el.tag == "link":
|
|
url = urlparse(el.get("href"))
|
|
if not self._is_excluded(url, initiator):
|
|
rel = el.get("rel", "")
|
|
|
|
# Replace external preconnect hint
|
|
if rel == "preconnect":
|
|
return ""
|
|
|
|
# Replace external style sheet or favicon
|
|
if rel == "stylesheet" or rel == "icon":
|
|
file = self._queue(url, config)
|
|
el.set("href", resolve(file))
|
|
|
|
# Handle external script or image
|
|
if el.tag == "script" or el.tag == "img":
|
|
url = urlparse(el.get("src"))
|
|
if not self._is_excluded(url, initiator):
|
|
file = self._queue(url, config)
|
|
el.set("src", resolve(file))
|
|
|
|
# Return element as string
|
|
return self._print(el)
|
|
|
|
# Find and replace all external asset URLs in current page
|
|
return re.sub(
|
|
r"<(?:(?:a|link)[^>]+href|(?:script|img)[^>]+src)=['\"]?http[^>]+>",
|
|
replace, output, flags = re.I | re.M
|
|
)
|
|
|
|
# -------------------------------------------------------------------------
|
|
|
|
# Print element as string - what could possibly go wrong? We're parsing
|
|
# HTML5 with an XML parser, and XML doesn't allow for boolean attributes,
|
|
# which is why we must add a dummy value to all attributes that are not
|
|
# strings before printing the element as string.
|
|
def _print(self, el: Element):
|
|
temp = "__temp__"
|
|
for name in el.attrib:
|
|
if not isinstance(el.attrib[name], str):
|
|
el.attrib[name] = temp
|
|
|
|
# Return void or opening tag as string, strip closing tag
|
|
data = tostring(el, encoding = "unicode")
|
|
return data.replace(" />", ">").replace(f"\"{temp}\"", "")
|
|
|
|
# Enqueue external asset for download, if not already done
|
|
def _queue(self, url: URL, config: MkDocsConfig, concurrent = False):
|
|
path = self._path_from_url(url)
|
|
full = posixpath.join(self.config.assets_fetch_dir, path)
|
|
|
|
# Try to retrieve existing file
|
|
file = self.assets.get_file_from_path(full)
|
|
if not file:
|
|
|
|
# Compute path to external asset, which is sourced from the cache
|
|
# directory, and generate file to register it with MkDocs as soon
|
|
# as it was downloaded. This allows other plugins to apply
|
|
# additional processing.
|
|
file = self._path_to_file(path, config)
|
|
file.url = url.geturl()
|
|
|
|
# Spawn concurrent job to fetch external asset if the extension is
|
|
# known and the concurrent flag is set. In that case, this function
|
|
# is called in a context where no replacements are carried out, so
|
|
# the caller must only ensure to reconcile the concurrent jobs.
|
|
_, extension = posixpath.splitext(url.path)
|
|
if extension and concurrent:
|
|
self.pool_jobs.append(self.pool.submit(
|
|
self._fetch, file, config
|
|
))
|
|
|
|
# Fetch external asset synchronously, as it either has no extension
|
|
# or is fetched from a context in which replacements are done
|
|
else:
|
|
self._fetch(file, config)
|
|
|
|
# Register external asset as file
|
|
self.assets.append(file)
|
|
|
|
# If the URL of the external asset includes a hash fragment, add it to
|
|
# the returned file, e.g. for dark/light images - see https://t.ly/7b16Y
|
|
if url.fragment:
|
|
file.url += f"#{url.fragment}"
|
|
|
|
# Return file associated with external asset
|
|
return file
|
|
|
|
# Fetch external asset referenced through the given file
|
|
def _fetch(self, file: File, config: MkDocsConfig):
|
|
|
|
# Check if external asset needs to be downloaded
|
|
if not os.path.isfile(file.abs_src_path) or not self.config.cache:
|
|
path = file.abs_src_path
|
|
|
|
# Download external asset
|
|
log.info(f"Downloading external file: {file.url}")
|
|
res = requests.get(file.url, headers = {
|
|
|
|
# Set user agent explicitly, so Google Fonts gives us *.woff2
|
|
# files, which according to caniuse.com is the only format we
|
|
# need to download as it covers the entire range of browsers
|
|
# we're officially supporting.
|
|
"User-Agent": " ".join([
|
|
"Mozilla/5.0 (Windows NT 10.0; Win64; x64)",
|
|
"AppleWebKit/537.36 (KHTML, like Gecko)",
|
|
"Chrome/98.0.4758.102 Safari/537.36"
|
|
])
|
|
})
|
|
|
|
# Compute expected file extension and append if missing
|
|
mime = res.headers["content-type"].split(";")[0]
|
|
extension = extensions.get(mime)
|
|
if extension and not path.endswith(extension):
|
|
path += extension
|
|
|
|
# Save to file and create symlink if no extension was present
|
|
self._save_to_file(path, res.content)
|
|
if path != file.abs_src_path:
|
|
|
|
# Creating symlinks might fail on Windows. Thus, we just print
|
|
# a warning and continue - see https://bit.ly/3xYFzcZ
|
|
try:
|
|
os.symlink(os.path.basename(path), file.abs_src_path)
|
|
except OSError as e:
|
|
if e.errno != errno.EEXIST:
|
|
log.warning(
|
|
f"Couldn't create symbolic link: {file.src_uri}"
|
|
)
|
|
|
|
# Fall back for when the symlink could not be created. This
|
|
# means that the plugin will download the original file on
|
|
# every build, as the content type cannot be resolved from
|
|
# the file extension.
|
|
file.abs_src_path = path
|
|
|
|
# Resolve destination if file points to a symlink
|
|
_, extension = os.path.splitext(file.abs_src_path)
|
|
if os.path.isfile(file.abs_src_path):
|
|
file.abs_src_path = os.path.realpath(file.abs_src_path)
|
|
_, extension = os.path.splitext(file.abs_src_path)
|
|
|
|
# If the symlink could not be created, we already set the correct
|
|
# extension, so we need to make sure not to append it again
|
|
if not file.abs_dest_path.endswith(extension):
|
|
file.src_uri += extension
|
|
|
|
# Compute destination file system path
|
|
file.dest_uri += extension
|
|
file.abs_dest_path += extension
|
|
|
|
# Compute destination URL
|
|
file.url = file.dest_uri
|
|
|
|
# Parse and enqueue dependent external assets
|
|
for url in self._parse_media(file):
|
|
if not self._is_excluded(url, file):
|
|
self._queue(url, config, concurrent = True)
|
|
|
|
# Patch all links to external assets in the given file
|
|
def _patch(self, initiator: File):
|
|
with open(initiator.abs_src_path, encoding = "utf-8") as f:
|
|
|
|
# Replace callback
|
|
def replace(match: Match):
|
|
value = match.group(1)
|
|
|
|
# Map URL to canonical path
|
|
path = self._path_from_url(urlparse(value))
|
|
full = posixpath.join(self.config.assets_fetch_dir, path)
|
|
|
|
# Try to retrieve existing file
|
|
file = self.assets.get_file_from_path(full)
|
|
if not file:
|
|
name = os.readlink(os.path.join(self.config.cache_dir, full))
|
|
full = posixpath.join(posixpath.dirname(full), name)
|
|
|
|
# Try again after resolving symlink
|
|
file = self.assets.get_file_from_path(full)
|
|
|
|
# This can theoretically never happen, as we're sure that we
|
|
# only replace files that we successfully extracted. However,
|
|
# we might have missed several cases, so it's better to throw
|
|
# here than to swallow the error.
|
|
if not file:
|
|
log.error(
|
|
"File not found. This is likely a bug in the built-in "
|
|
"privacy plugin. Please create an issue with a minimal "
|
|
"reproduction."
|
|
)
|
|
sys.exit(1)
|
|
|
|
# Create absolute URL for asset in script
|
|
if file.url.endswith(".js"):
|
|
url = posixpath.join(self.site.geturl(), file.url)
|
|
|
|
# Create relative URL for everything else
|
|
else:
|
|
url = file.url_relative_to(initiator)
|
|
|
|
# Switch external asset URL to local path
|
|
return match.group().replace(value, url)
|
|
|
|
# Resolve replacement expression according to asset type
|
|
_, extension = posixpath.splitext(initiator.dest_uri)
|
|
expr = re.compile(self.assets_expr_map[extension], re.I | re.M)
|
|
|
|
# Resolve links to external assets in file
|
|
self._save_to_file(
|
|
initiator.abs_dest_path,
|
|
expr.sub(replace, f.read())
|
|
)
|
|
|
|
# -------------------------------------------------------------------------
|
|
|
|
# Normalize (= canonicalize) path by removing trailing slashes, and ensure
|
|
# that hidden folders (`.` after `/`) are unhidden. Otherwise MkDocs will
|
|
# not consider them being part of the build and refuse to copy them.
|
|
def _path_from_url(self, url: URL):
|
|
path = posixpath.normpath(url.path)
|
|
path = re.sub(r"/\.", "/_", path)
|
|
|
|
# Compute digest of query string, as some URLs yield different results
|
|
# for different query strings, e.g. https://unsplash.com/random?Coffee
|
|
if url.query:
|
|
name, extension = posixpath.splitext(path)
|
|
|
|
# Inject digest after file name and before file extension, as
|
|
# done for style sheet and script files as well
|
|
digest = sha1(url.query.encode("utf-8")).hexdigest()[:8]
|
|
path = f"{name}.{digest}{extension}"
|
|
|
|
# Create and return URL without leading double slashes
|
|
url = url._replace(scheme = "", query = "", fragment = "", path = path)
|
|
return url.geturl()[2:]
|
|
|
|
# Create a file for the given path
|
|
def _path_to_file(self, path: str, config: MkDocsConfig):
|
|
return File(
|
|
posixpath.join(self.config.assets_fetch_dir, path),
|
|
os.path.abspath(self.config.cache_dir),
|
|
config.site_dir,
|
|
False
|
|
)
|
|
|
|
# Create a file on the system with the given content
|
|
def _save_to_file(self, path: str, content: str | bytes):
|
|
os.makedirs(os.path.dirname(path), exist_ok = True)
|
|
if isinstance(content, str):
|
|
content = bytes(content, "utf-8")
|
|
with open(path, "wb") as f:
|
|
f.write(content)
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# Data
|
|
# -----------------------------------------------------------------------------
|
|
|
|
# Set up logging
|
|
log = logging.getLogger("mkdocs.material.privacy")
|
|
|
|
# Expected file extensions
|
|
extensions = {
|
|
"application/javascript": ".js",
|
|
"image/avif": ".avif",
|
|
"image/gif": ".gif",
|
|
"image/jpeg": ".jpg",
|
|
"image/png": ".png",
|
|
"image/svg+xml": ".svg",
|
|
"image/webp": ".webp",
|
|
"text/javascript": ".js",
|
|
"text/css": ".css"
|
|
}
|