Validator.nu JSON to HTML

validator_json_to_html.py

#!/usr/local/bin/python3

import sys
import argparse
import html
import requests
from pprint import pprint

ICON_INFO = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24"><path fill="currentColor" d="M13 7.5a1 1 0 11-2 0 1 1 0 012 0zm-3 3.75a.75.75 0 01.75-.75h1.5a.75.75 0 01.75.75v4.25h.75a.75.75 0 010 1.5h-3a.75.75 0 010-1.5h.75V12h-.75a.75.75 0 01-.75-.75z"></path><path fill="currentColor" fill-rule="evenodd" d="M12 1C5.925 1 1 5.925 1 12s4.925 11 11 11 11-4.925 11-11S18.075 1 12 1zM2.5 12a9.5 9.5 0 1119 0 9.5 9.5 0 01-19 0z"></path></svg>'
ICON_ERROR = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24"><path fill="currentColor" d="M12 7a.75.75 0 01.75.75v4.5a.75.75 0 01-1.5 0v-4.5A.75.75 0 0112 7zm1 9a1 1 0 11-2 0 1 1 0 012 0z"></path><path fill="currentColor" fill-rule="evenodd" d="M12 1C5.925 1 1 5.925 1 12s4.925 11 11 11 11-4.925 11-11S18.075 1 12 1zM2.5 12a9.5 9.5 0 1119 0 9.5 9.5 0 01-19 0z"></path></svg>'

parser = argparse.ArgumentParser(
    description="Validate URL with Validator.nu and format output as HTML fragments"
)
parser.add_argument("doc", type=str, help="URL of document to validate")
args = parser.parse_args()

r = requests.get('https://html5.validator.nu/', params={"doc": args.doc, "out": "json"})
messages = r.json().get('messages', [])

if len(messages):
    print('- %d HTML validation messages:' % len(messages))

for message in messages:
    template = """
<div class="alert %s" role="alert" style="overflow: hidden;">
    <div class="d-flex">
        <div class="mr-3" style="color: %s;">
            %s
        </div>
        <div>
            <strong class="d-block mb-1">%s</strong>
            <code>[%d:%d] %s</code>
        </div>
    </div>
</div>
    """

    extract_start = message['hiliteStart']
    extract_end = extract_start + message['hiliteLength']

    alert_icon = ICON_INFO if message['type'] == 'info' else ICON_ERROR
    alert_color = '#856404' if message['type'] == 'info' else '#721c24'
    alert_class = 'alert-warning' if message['type'] == 'info' else 'alert-danger'

    output = template % (
        alert_class,
        alert_color,
        alert_icon,
        message['message'],
        message.get('firstLine') or message['lastLine'],
        message['firstColumn'],
        html.escape(message['extract'][extract_start:extract_end]),
    )

    print(output)