script: add script to download a timetable json from its ID

scripts/download_timetable.py

@@ -0,0 +1,44 @@
+#
+# This script can be used to download the content of a timetable knowing only its ID,
+# as a JSON file that can be re-imported in OSRD.
+#
+
+import requests
+import json
+from typing import Dict, List
+
+EDITOAST_URL = "https://rec-osrd.reseau.sncf.fr/"
+COOKIES = {
+    # Connect to the front-end and look through the "cookies" part of any sent request
+    "gateway" : ""
+}
+TIMETABLE_ID = 1
+OUT_PATH = "timetable.json"
+
+
+def download_timetable(timetable_id: int) -> List[Dict]:
+    response = requests.get(f"{EDITOAST_URL}api/timetable/{timetable_id}/", cookies=COOKIES, verify=False)
+    response.raise_for_status()
+    json_response = response.json()
+    train_ids = json_response["train_ids"]
+    return download_trains(train_ids)
+
+
+def download_trains(train_ids: List[int]) -> List[Dict]:
+    payload = {
+        "ids": train_ids
+    }
+    response = requests.post(f"{EDITOAST_URL}api/train_schedule/", cookies=COOKIES, json=payload, verify=False)
+    response.raise_for_status()
+    json_response = response.json()
+    for path_item in json_response:
+        del path_item["id"]
+        del path_item["timetable_id"]
+    return json_response
+
+
+if __name__ == "__main__":
+    trains = download_timetable(TIMETABLE_ID)
+    with open(OUT_PATH, "w", encoding="utf-8") as jsonfile:
+        json.dump(trains, jsonfile, ensure_ascii=False, indent=4)
+    print(f"dumped timetable {TIMETABLE_ID} ({len(trains)} trains) to {OUT_PATH}")