def getPreviewUrl():
assert 'previewUrl' in session, "Preloaded image not there"
url = session['previewUrl']
assert Verifier.urlValid(url), "Invalid preview url"
return url
def setPreviewUrl(url):
assert SessionManager.__inSession(), "Not in Flask session"
assert Verifier.urlValid(url), "Invalid preview url"
session['previewUrl'] = url
