redirect to cyphal gh-page (#41)

Co-authored-by: Pavel Kirienko <[email protected]>

Author: songmeo

app/view/specification.py

@@ -1,32 +1,14 @@
-#
-# Copyright (C) 2019 UAVCAN Development Team <[email protected]>.
+# Copyright (C) OpenCyphal <[email protected]>.
 # Author: Pavel Kirienko <[email protected]>
-#
 
-import os
-import re
-import glob
+from flask import redirect
 from .. import app
-from flask import send_file, redirect, abort
 
+_SPECIFICATION_URI = "https://opencyphal.github.io/specification/Cyphal_Specification.pdf"
 
-_SPECIFICATION_DIRECTORY_PATH = os.path.join(app.root_path, '..', 'specification')
 
-_CYPHAL_SPECIFICATION_GLOB = 'Cyphal_Specification*.pdf'
-
-@app.route('/specification/')
-def _latest_specification():
-    entries = list(glob.glob(os.path.join(_SPECIFICATION_DIRECTORY_PATH, _CYPHAL_SPECIFICATION_GLOB)))
-    entries.sort(key=lambda t: [int(c) if c.isdigit() else c for c in re.split(r'(\d+)', t)])   # Natural sorting
-    newest_file = os.path.basename(entries[-1])
-    app.logger.info('Sorted specifications: %r, newest: %r', entries, newest_file)
-    return redirect('/specification/' + newest_file)
-
-
-@app.route('/specification/<path:file_name>')
-def _particular_specification(file_name):
-    try:
-        return send_file(os.path.join(_SPECIFICATION_DIRECTORY_PATH, file_name),
-                         mimetype='application/pdf')
-    except FileNotFoundError:
-        return abort(404)
+@app.route("/specification/", defaults={"subpath": ""})
+@app.route("/specification/<path:subpath>")
+def _latest_specification(subpath: str):
+    _ = subpath
+    return redirect(_SPECIFICATION_URI, code=301)