File diff 4758b8bcfd5c → 87961c6cee48
www/conservancy/apps/news/templatetags/fill_url.py
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new file 100644
 
import urlparse
 

	
 
from django import template
 

	
 
register = template.Library()
 

	
 
@register.filter(name='fill_url')
 
def fill_url(given_url, base_url):
 
    """"Fill out" missing pieces of one URL from another.
 

	
 
    This function parses the given URL, and if it's missing any pieces
 
    (scheme, netloc, etc.), it fills those in from the base URL.
 
    Typical usage is "/URL/path"|fill_url:"https://hostname/"
 
    to generate "https://hostname/URL/path".
 
    """
 
    given_parts = urlparse.urlsplit(given_url)
 
    base_parts = urlparse.urlsplit(base_url)
 
    return urlparse.urlunsplit(
 
        given_part or base_part for given_part, base_part in zip(given_parts, base_parts)
 
    )