| def main(request, response): | |
| headers = [("Content-Type", "text/plain")] | |
| headers.append(("Access-Control-Allow-Origin", "*")) | |
| allowed_headers = "x-print" | |
| if "Access-Control-Request-Headers" in request.headers: | |
| allowed_headers = request.headers.get( | |
| "Access-Control-Request-Headers", "") | |
| headers.append(("Access-Control-Allow-Headers", allowed_headers)) | |
| if "check" in request.GET: | |
| token = request.GET.first("token") | |
| value = request.server.stash.take(token) | |
| if value == None: | |
| body = "0" | |
| else: | |
| if request.GET.first("check", None) == "keep": | |
| request.server.stash.put(token, value) | |
| body = "1" | |
| return headers, body | |
| if request.method == "OPTIONS": | |
| if not "Access-Control-Request-Method" in request.headers: | |
| response.set_error(400, "No Access-Control-Request-Method header") | |
| return "ERROR: No access-control-request-method in preflight!" | |
| headers.append(("Access-Control-Allow-Methods", | |
| request.headers['Access-Control-Request-Method'])) | |
| if "token" in request.GET: | |
| if allowed_headers.find("first_request") != -1: | |
| # Put a cache entry that lasts longer for the first request. | |
| headers.append(("Access-Control-Max-Age", "3")) | |
| else: | |
| headers.append(("Access-Control-Max-Age", "1")) | |
| token = request.GET.first("token") | |
| value = request.server.stash.take(token) | |
| request.server.stash.put(token, 1) | |
| body = request.headers.get("x-print", "NO") | |
| return headers, body |