new_contents: # -*- coding: utf-8 -*-
  
  import os
  
  try:
      import urlparse
  except ImportError:
      import urllib.parse as urlparse
  
  
  # Register database schemes in URLs.
  urlparse.uses_netloc.append("elasticsearch")
  urlparse.uses_netloc.append("solr")
  urlparse.uses_netloc.append("whoosh")
  urlparse.uses_netloc.append("simple")
  
  
  DEFAULT_ENV = "SEARCH_URL"
  
  SCHEMES = {
      "elasticsearch": "haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine",
      "solr": "haystack.backends.solr_backend.SolrEngine",
      "whoosh": "haystack.backends.whoosh_backend.WhooshEngine",
      "simple": "haystack.backends.simple_backend.SimpleEngine",
  }
  
  USES_URL = ["solr"]
  USES_INDEX = ["elasticsearch"]
  USES_PATH = ["whoosh"]
  
  
  def config(env=DEFAULT_ENV, default=None):
      """Returns configured HAYSTACK_CONNECTIONS dictionary from ``env``."""
  
      config = {}
  
      s = os.environ.get(env, default)
  
      if s:
          config = parse(s)
  
      return config
  
  
  def parse(url):
      """Parses a search URL."""
  
      config = {}
  
      url = urlparse.urlparse(url)
  
      # Remove query strings.
      path = url.path[1:]
      path = path.split('?', 2)[0]
  
      if url.scheme in SCHEMES:
          config["ENGINE"] = SCHEMES[url.scheme]
  
      if url.scheme in USES_URL:
          config["URL"] = urlparse.urlunparse(("http",) + url[1:])
  
      if url.scheme in USES_INDEX:
          if path.endswith("/"):
              path = path[:-1]
  
          split = path.rsplit("/", 1)
  
          if len(split) > 1:
              path = split[:-1]
              index = split[-1]
          else:
              path = ""
              index = split[0]
  
          config.update({
              "URL": urlparse.urlunparse(("http",) + url[1:2] + (path,) + url[3:]),
              "INDEX_NAME": index,
          })
  
      if url.scheme in USES_PATH:
          config.update({
              "PATH": path,
          })
  
      return config
  
subject: Add the dj_search_url module