Read misc.httpmethod, misc.protocol and misc.port from their IANA registries

data-import/protocol.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+"""Rebuild data/misc/protocol.tsv from the IANA Protocol Numbers registry.
+
+    data-import/protocol.py [--source URL_OR_FILE] [--cache DIR] [--out FILE]
+
+A number the registry leaves unassigned, reserves or marks deprecated does not ship.
+Where it names no protocol beside the keyword, the keyword is the name.
+"""
+import argparse
+import csv
+import io
+from pathlib import Path
+
+import source
+import tsv
+
+SOURCE = "https://www.iana.org/assignments/protocol-numbers/protocol-numbers-1.csv"
+OUT = Path(__file__).resolve().parent.parent / "data" / "misc" / "protocol.tsv"
+CACHE = Path(__file__).resolve().parent / "cache"
+COLUMNS = ["keyword", "name", "number"]
+SKIP = ("Unassigned", "Reserved", "deprecated")
+
+
+def rows(text):
+    for r in csv.DictReader(io.StringIO(text)):
+        number, keyword = r["Decimal"].strip(), r["Keyword"].strip()
+        if not number.isdigit() or not keyword or any(s in keyword for s in SKIP):
+            continue
+        yield {"keyword": keyword, "name": " ".join(r["Protocol"].split()) or keyword, "number": number}
+
+
+def main():
+    p = argparse.ArgumentParser(description=__doc__.splitlines()[0])
+    p.add_argument("--cache", default=str(CACHE))
+    p.add_argument("--source", default=SOURCE)
+    p.add_argument("--out", default=str(OUT))
+    a = p.parse_args()
+    table = sorted(rows(source.fetch(a.source, a.cache, "protocol-numbers-1.csv").decode("utf-8")), key=lambda r: int(r["number"]))
+    tsv.write(a.out, COLUMNS, table)
+
+
+if __name__ == "__main__":
+    main()