def main(request, path):
"""Search for a long link matching the `path` and redirect"""
path = _extract_valid_path(path)
link = Link.find_by_hash(path)
redirect_suffix = None
if link is None:
# Try to find a matching prefix
parts = path.split('/', 1)
if len(parts) == 2:
path_prefix, redirect_suffix = parts
# If there was a prefix, we try to find a link again
link = Link.find_by_hash(path_prefix)
# Instrumentation
prefix_tag = 'prefix:' + link.prefix if link else 'Http404'
statsd.increment('workforus.clicks', tags=[prefix_tag])
statsd.set('workforus.unique_links', link.hash if link else 'Http404', tags=[prefix_tag])
statsd.set('workforus.unique_ips', get_client_ip(request), tags=['browser:' + get_browser(request)])
# 404 if link not found or register a click if the DB is not in readonly mode
if link is None:
raise Http404
elif mongoengine_is_primary():
link.click()
# Tweak the redirection link based on the query string, redirection suffix, etc.
# FIXME: Handle multiple parameters with the same name in the `url`
query = request.GET.copy()
if redirect_suffix is not None:
query[REDIRECT_PARAM_NAME] = redirect_suffix
if bool(query) and REF_PARAM_NAME not in query:
# If we specify a non empty query, indicate that the shortener tweaked the url
query[REF_PARAM_NAME] = REF_PARAM_DEFAULT_VALUE
target_url = url_append_parameters(
link.long_url,
params_to_replace=query,
defaults={REF_PARAM_NAME: REF_PARAM_DEFAULT_VALUE}
)
# Either redirect the user, or load the target page and display it directly
if link.act_as_proxy:
return proxy(target_url)
return redirect(target_url, permanent=True)
def test__url_append_parameters(self):
self.assertEqual(
url_append_parameters('http://workfor.us', dict(), dict()),
'http://workfor.us'
)
self.assertEqual(
url_append_parameters('http://workfor.us', {'toto': 'tata'}, dict()),
'http://workfor.us?toto=tata'
)
self.assertEqual(
url_append_parameters('http://www.theuselessweb.com/', {'foo': 'search'}, {'foo': 'bar'}),
'http://www.theuselessweb.com/?foo=search'
)
self.assertEqual(
url_append_parameters('http://www.theuselessweb.com?a=1&b=2&z=5', {'foo': 'search'}, {'b': '3'}),
'http://www.theuselessweb.com?a=1&b=2&z=5&foo=search'
)
self.assertEqual(
url_append_parameters('http://www.theuselessweb.com?foo=4', {'foo': 'search'}, {'c': '42'}),
'http://www.theuselessweb.com?c=42&foo=search'
)
