CAT-SOOP is a flexible, programmable learning management system based on the Python programming language. https://catsoop.mit.edu
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  1. # This file is part of CAT-SOOP
  2. # Copyright (c) 2011-2020 by The CAT-SOOP Developers <catsoop-dev@mit.edu>
  3. #
  4. # This program is free software: you can redistribute it and/or modify it under
  5. # the terms of the GNU Affero General Public License as published by the Free
  6. # Software Foundation, either version 3 of the License, or (at your option) any
  7. # later version.
  8. #
  9. # This program is distributed in the hope that it will be useful, but WITHOUT
  10. # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  11. # FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
  12. # details.
  13. #
  14. # You should have received a copy of the GNU Affero General Public License
  15. # along with this program. If not, see <http://www.gnu.org/licenses/>.
  16. from http import HTTPStatus
  17. def handle(context):
  18. uname = context.get("cs_username", "None")
  19. logname = "staticaccess"
  20. fname = context["filename"]
  21. user = context["cs_user_info"]
  22. perms = user.get("permissions", [])
  23. rel = context["csm_tutor"].get_release_date(context)
  24. ts = context["cs_timestamp"]
  25. current = context["csm_time"].from_detailed_timestamp(ts)
  26. log_entry = {
  27. k: v
  28. for (k, v) in context.items()
  29. if k in {"cs_timestamp", "cs_path_info", "cs_user_info"}
  30. }
  31. m = None
  32. status = HTTPStatus.OK
  33. if "view" not in perms and "view_all" not in perms or uname == "None":
  34. m = "You are not authorized to view this handout."
  35. status = HTTPStatus.UNAUTHORIZED
  36. elif "view" in perms and current < rel:
  37. reltime = context["csm_time"].short_timestamp(rel)
  38. m = (
  39. "This handout is not yet available. " "It will become available at: %s"
  40. ) % reltime
  41. status = HTTPStatus.NOT_FOUND
  42. log_entry["success"] = m is None
  43. context["csm_cslog"].update_log(uname, [context["cs_course"]], logname, log_entry)
  44. if m is None:
  45. return context["csm_dispatch"].serve_static_file(
  46. context, fname, context["cs_env"]
  47. )
  48. else:
  49. return (
  50. (status.value, status.phrase),
  51. {"Content-type": "text/plain", "Content-length": str(len(m))},
  52. m,
  53. )