| def main(request, response): | |
| headers = [("Content-Type", "text/plain")] | |
| stashed_data = {'control_request_headers': "", 'preflight': "0", 'preflight_referrer': ""} | |
| token = None | |
| if "token" in request.GET: | |
| token = request.GET.first("token") | |
| if "origin" in request.GET: | |
| for origin in request.GET['origin'].split(", "): | |
| headers.append(("Access-Control-Allow-Origin", origin)) | |
| else: | |
| headers.append(("Access-Control-Allow-Origin", "*")) | |
| if "clear-stash" in request.GET: | |
| if request.server.stash.take(token) is not None: | |
| return headers, "1" | |
| else: | |
| return headers, "0" | |
| if "credentials" in request.GET: | |
| headers.append(("Access-Control-Allow-Credentials", "true")) | |
| 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!" | |
| if "control_request_headers" in request.GET: | |
| stashed_data['control_request_headers'] = request.headers.get("Access-Control-Request-Headers", None) | |
| if "max_age" in request.GET: | |
| headers.append(("Access-Control-Max-Age", request.GET['max_age'])) | |
| if "allow_headers" in request.GET: | |
| headers.append(("Access-Control-Allow-Headers", request.GET['allow_headers'])) | |
| if "allow_methods" in request.GET: | |
| headers.append(("Access-Control-Allow-Methods", request.GET['allow_methods'])) | |
| preflight_status = 200 | |
| if "preflight_status" in request.GET: | |
| preflight_status = int(request.GET.first("preflight_status")) | |
| stashed_data['preflight'] = "1" | |
| stashed_data['preflight_referrer'] = request.headers.get("Referer", "") | |
| if token: | |
| request.server.stash.put(token, stashed_data) | |
| return preflight_status, headers, "" | |
| if token: | |
| data = request.server.stash.take(token) | |
| if data: | |
| stashed_data = data | |
| #use x-* headers for returning value to bodyless responses | |
| headers.append(("Access-Control-Expose-Headers", "x-did-preflight, x-control-request-headers, x-referrer, x-preflight-referrer, x-origin")) | |
| headers.append(("x-did-preflight", stashed_data['preflight'])) | |
| if stashed_data['control_request_headers'] != None: | |
| headers.append(("x-control-request-headers", stashed_data['control_request_headers'])) | |
| headers.append(("x-preflight-referrer", stashed_data['preflight_referrer'])) | |
| headers.append(("x-referrer", request.headers.get("Referer", "") )) | |
| headers.append(("x-origin", request.headers.get("Origin", "") )) | |
| if token: | |
| request.server.stash.put(token, stashed_data) | |
| return headers, "" |