58 lines
2.1 KiB
Python
58 lines
2.1 KiB
Python
#!/usr/bin/env python3
|
|
"""Rebuild data/misc/httpmethod.tsv from the IANA HTTP Method Registry.
|
|
|
|
data-import/httpmethod.py [--source URL_OR_FILE] [--cache DIR] [--out FILE]
|
|
|
|
A method ships when the register cites the HTTP core specification for it, RFC 9110
|
|
section 9.3 or RFC 5789, which is the nine a request carries; the WebDAV and DeltaV
|
|
extensions the register also holds do not. The register's `yes` and `no` ship as `true`
|
|
and `false`, which a consumer's boolean reads.
|
|
"""
|
|
import argparse
|
|
import csv
|
|
import io
|
|
import re
|
|
import sys
|
|
from pathlib import Path
|
|
|
|
import source
|
|
import tsv
|
|
|
|
SOURCE = "https://www.iana.org/assignments/http-methods/methods.csv"
|
|
OUT = Path(__file__).resolve().parent.parent / "data" / "misc" / "httpmethod.tsv"
|
|
CACHE = Path(__file__).resolve().parent / "cache"
|
|
COLUMNS = ["idempotent", "method", "safe"]
|
|
CORE = re.compile(r"\[RFC9110, Section 9\.3\.|\[RFC5789, Section 2\]")
|
|
BOOLEAN = {"yes": "true", "no": "false"}
|
|
EXPECTED = 9
|
|
|
|
|
|
def rows(text):
|
|
for r in csv.DictReader(io.StringIO(text)):
|
|
method = (r["Method Name"] or "").strip()
|
|
if not CORE.search(r["Reference"] or ""):
|
|
continue
|
|
answers = {}
|
|
for column in ("Safe", "Idempotent"):
|
|
answer = (r[column] or "").strip()
|
|
if answer not in BOOLEAN:
|
|
sys.exit(f"{method}: {column} {answer!r} is neither yes nor no")
|
|
answers[column] = BOOLEAN[answer]
|
|
yield {"idempotent": answers["Idempotent"], "method": method, "safe": answers["Safe"]}
|
|
|
|
|
|
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, "http-methods.csv").decode("utf-8")), key=lambda r: r["method"])
|
|
if len(table) != EXPECTED:
|
|
sys.exit(f"{len(table)} methods cite the core specification, not {EXPECTED}; the register's Reference column has moved")
|
|
tsv.write(a.out, COLUMNS, table)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|