Django Template Filters to Add HTTPS and Highlight URLs

Django Template Filters to Add HTTPS and Highlight URLs You may use these Django template filters to add HTTPS to your URLs and highlight them as anchor tags (a) with simple code. I have added comments to describe how the code works.

 # app/templatetags/app_filters.py
from urlextract import URLExtract
import requests
...
@register.filter(name='addhttpstodomains') # The first filter, to add HTTPS
def addhttpstodomains(value):
    domains = re.findall(r'', value) # Regex to get a URL
    dic = {}
    output = ""
    for domain in domains:
        if not domain[1].lower() in escaped_domains:
            url = 'https://' + domain[1]
            if not url.lower().startswith('uglek.com'):
                try:
                    response = requests.head('https://' + domain[1]) # Get the head
                    if response.status_code == 200: # If the page exists
                        dic[domain[1]] = 'https://' + domain[1] 
                except:
                    print("URL does not exist")
            else:
                dic[domain[1]] = 'https://' + domain[1]
    replaced_items = []
    for i, j in dic.items(): # Replace without replacing twice
        if not i in replaced_items:
            value = value.replace(i, j)
        replaced_items.append(i);
    value = str(value)
    while value.find('https://') > -1: # Remove any duplicates
        value = value.replace('https://','https://')
    return value

@register.filter(name='embedlinks')
def embedlinks(value):
    output = ""
    chunks = value.split("https://") # Split at HTTPS
    for x, chunk in enumerate(chunks): # Enumerate over split sections
        if x != 0:
            chunk = "https://" + chunk # Add HTTPS back in
        urls = extractor.find_urls(chunk); # Find URL in chunk
        dic = {}
        for url in urls:
            plus = ' (it\'s on Uglek)' # Configure anchor tag
            if not url[8:17].lower() == 'uglek.com':
                plus = ' (it will take you outside of Uglek)'
            if url.endswith('.') or url.endswith(','):
                url = url[:-1]
            if not url.lower().startswith('uglek.com') and url.lower().startswith('https://'):
                try:
                    response = requests.head(url) # Get the page
                    if response.status_code == 200: # If it exists
                        dic[url] = '' + url[8:] + '' # Build anchor tag to replace URL with
                except:
                    print("URL does not exist")
            elif url.startswith('https://'):
                dic[url] = '' + url[8:] + ''
        for i, j in dic.items(): # Find and replace in chunk
            chunk = chunk.replace(i, j)
        output = output + chunk # Put the pieces back together
    return output

{{ post.content|addhttpstodomains|embedlinks }} # Add HTTPS and embed links

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