Generate torrent with libtorrent's Python bindings. This is work for #12.

scripts/02_libtorrent_experiments/generate_torrent.py

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+import libtorrent as lt
+import sys
+import os
+import urllib.parse
+
+### Edit Me ###
+DATA_DIR = "~/Documents/Personal/Projects/dataforcanada/decentralized-distribution-labs/data"
+DATA_DIR = os.path.expanduser(DATA_DIR)
+TRACKER_URL = "https://tracker.labs.dataforcanada.org/announce"
+CREATOR = "Data for Canada"
+DATASET_ID = "ca-bc_vancouver-2022A00055915022_orthoimagery_2022_075mm"
+TORRENT_COMMENT = "Data for Canada orthoimagery labs data package"
+FILEPATH = f"{DATA_DIR}/{DATASET_ID}.pmtiles"
+
+# HTTP URL(s) to the dataset
+WEB_SEED_URLS = [
+    f"https://data.source.coop/dataforcanada/ca-orthoimagery-labs/{DATASET_ID}.pmtiles",
+    f"https://data-01.labs.dataforcanada.org/processed/{DATASET_ID}.pmtiles",
+    f"https://data-02.labs.dataforcanada.org/processed/{DATASET_ID}.pmtiles"
+]
+### Edit Me ###
+
+def generate_data_package_torrent(filepath, TORRENT_COMMENT, WEB_SEED_URLS):
+    parent_dir = os.path.dirname(filepath)
+    filename = os.path.basename(filepath)
+    
+    # Create file storage. 
+    # Can either add a file, or folder of file(s)
+    fs = lt.file_storage()
+    lt.add_files(fs, filepath)
+
+    # Create torrent object
+    t = lt.create_torrent(fs)
+    t.add_tracker(TRACKER_URL)
+    t.set_creator(CREATOR)
+    t.set_comment(TORRENT_COMMENT)
+    
+    # Add the HTTP web seed (where the data is)
+    for seed_url in WEB_SEED_URLS:
+        t.add_url_seed(seed_url)
+
+    # Hash the files
+    msg = f"Hashing file(s). '{filepath}'"
+    print(msg)
+    lt.set_piece_hashes(t, parent_dir)
+
+    # Generate the torrent file content
+    torrent_dict = t.generate()
+    torrent_bytes = lt.bencode(torrent_dict)
+
+    # Save the .torrent file to DATA_DIR
+    torrent_filename = f"{DATA_DIR}/{filename}.torrent"
+    with open(torrent_filename, "wb") as f:
+        f.write(torrent_bytes)
+    print(f"Success: Saved '{torrent_filename}'")
+
+
+if __name__ == '__main__':
+    if os.path.exists(FILEPATH):
+        link = generate_data_package_torrent(FILEPATH, TORRENT_COMMENT, WEB_SEED_URLS)
+    else:
+        print(f"Error: File not found: {FILEPATH}")