import subprocess

from pathlib import Path

from tempfile import TemporaryDirectory

from bs4 import BeautifulSoup

import time

def main(request):

# Set CORS headers for the preflight request

if request.method == 'OPTIONS':

headers = {

'Access-Control-Allow-Origin': '*',

'Access-Control-Allow-Methods': 'POST',

'Access-Control-Allow-Headers': 'Content-Type',

'Access-Control-Max-Age': '3600'

}

return ('', 204, headers)

request_json = request.get_json()

md_content = request_json['markdown']

with TemporaryDirectory() as tmpdirname:

html_content = render(md_content, tmpdirname)

headers = {

'Access-Control-Allow-Origin': '*'

}

return (html_content, 200, headers)

def render(markdown: str, directory: str) -> str:

# prepare file structure and configuration for MkDocs

tmp_path = Path(str(directory))

(tmp_path / "docs").mkdir(parents=True, exist_ok=True)

(tmp_path / "mkdocs.yml").write_text("""

site_name: CP Algorithms

theme:

name: material

markdown_extensions:

- pymdownx.arithmatex:

generic: true

- pymdownx.highlight

- admonition

- pymdownx.details

- pymdownx.superfences

- pymdownx.tabbed:

alternate_style: true

- attr_list

- pymdownx.emoji:

emoji_index: !!python/name:materialx.emoji.twemoji

emoji_generator: !!python/name:materialx.emoji.to_svg

plugins:

- macros

""")

(tmp_path / "docs" / "index.md").write_text(markdown)

# render the page

start_time = time.time()

subprocess.run(['mkdocs', 'build', '--dirty'], cwd=tmp_path)

print(f"finish dirty build: {time.time() - start_time:2.5f}s")

# extract the main content (without header/footer/...)

with open(tmp_path / "site" / "index.html") as fp:

soup = BeautifulSoup(fp, "html.parser")

article = soup.find("article")

article_html = ''.join([str(x) for x in article])

return article_html

if __name__ == "__main__":

with TemporaryDirectory() as tmpdirname:

print(render("# H1", tmpdirname))