How to Validate an HTML file in Python

If we fail to validate HTML files before they’re opened, we’re asking for problems. Thankfully, it’s super straightforward to validate HTML files in our Python applications using the free API solution provided below. This solution identifies invalidate HTML files with a “DocumentIsValid” Boolean response, and it additionally identifies whether these files are password protected, which is extremely useful for identifying potentially malicious behavior.

To call this API, first run the following command:

pip install cloudmersive-convert-api-client

Then add the imports, and call the function:

from __future__ import print_function
import time
import cloudmersive_convert_api_client
from cloudmersive_convert_api_client.rest import ApiException
from pprint import pprint

# Configure API key authorization: Apikey
configuration = cloudmersive_convert_api_client.Configuration()
configuration.api_key['Apikey'] = 'YOUR_API_KEY'



# create an instance of the API class
api_instance = cloudmersive_convert_api_client.ValidateDocumentApi(cloudmersive_convert_api_client.ApiClient(configuration))
input_file = '/path/to/inputfile' # file | Input file to perform the operation on.

try:
    # Validate an HTML file
    api_response = api_instance.validate_document_html_validation(input_file)
    pprint(api_response)
except ApiException as e:
    print("Exception when calling ValidateDocumentApi->validate_document_html_validation: %s\n" % e)

And that’s all the code you’ll need! To complete your API call, just include a free-tier Cloudmersive API key in the configuration.api_key field (you can get a free API key here by registering a free account), and you’re all done.