75 lines
2.5 KiB
Python
75 lines
2.5 KiB
Python
from flask import Flask, url_for, render_template, abort
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import os
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import json
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from app.config import PANDOC_LINK, PANDOC_PATH, WHITELIST_PATH
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from app.hash_manager import hash_file_sha512
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import subprocess
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app = Flask(__name__)
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@app.context_processor
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def override_url_for():
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return dict(url_for=dated_url_for)
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#TODO: make instead of datetime hash of commit
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def dated_url_for(endpoint, **values):
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if endpoint == 'static':
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filename = values.get('filename', None)
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if filename:
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file_path = os.path.join(app.root_path, endpoint, filename)
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values['q'] = int(os.stat(file_path).st_mtime)
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return url_for(endpoint, **values)
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def render_page(page):
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path = f'{PANDOC_PATH}/{page}'
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whitelist = WHITELIST_PATH
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with open(whitelist, 'r') as f:
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if page not in f.readlines():
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raise Exception("Page doesn't exist!")
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if not os.path.exists(f'{path}'):
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raise Exception("Page doesn't exist!")
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in_filename = f'{path}/main.md'
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out_filename = f'{path}/render.html'
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os.system(f'pandoc {in_filename} --to html --mathjax --output {out_filename}')
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print('Creating lock file')
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os.system(f'echo {hash_file_sha512(in_filename)} > {out_filename}.lock')
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@app.route(f'/{PANDOC_LINK}/<page>')
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def get_pandoc_page(page):
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path = f'{PANDOC_PATH}/{page}'
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whitelist = WHITELIST_PATH
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with open(whitelist, 'r') as f:
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if page not in f.readlines():
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return 'This page does not exist'
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if not os.path.exists(f'{path}'):
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# TODO: Add 404 handler
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return 'This page does not exist'
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with open(f'{path}/config.json') as f:
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data = json.loads(f.read())
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if not os.path.exists(f'{path}/render.html') or not os.path.exists(f'{path}/render.html.lock'):
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print('Rendered page or lockfile for {page} does not exist! Rendering {page}')
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render_page(page)
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else:
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with open(f'{path}/render.html.lock', 'r') as f:
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rendered_hash = f.read().strip()
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current_hash = hash_file_sha512(f'{path}/main.md')
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if rendered_hash != current_hash:
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print(f'CURRENT: {current_hash}, RENDERED: {rendered_hash}')
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print('Integrity test failed, rendering {page}!')
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render_page(page)
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template = data['template']
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with open(f'{path}/render.html', 'r') as f:
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inserted = f.read()
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return render_template(template, markdown=inserted)
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@app.route('/')
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def index():
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return render_template('index.html')
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