upload

app/subroutines/route.py

@@ -0,0 +1,48 @@
+# /                 -> Exact("/")
+# /foo              -> Exact("/foo")
+# /foo/             -> Exact("/foo/")
+# /foo/bar          -> Exact("/foo/bar")
+# /foo/bar/{n}      -> Exact("/foo/bar/"), Format("n")
+# /foo/{n}/bar      -> Exact("/foo/"), Format("n"), Exact("/bar")
+# /foo{n:5}/bar     -> Exact("/foo"), Format("n", minl=5, maxl=5), Exact("/bar")
+# /foo/{m:1-}/{n:3-5}bar -> Exact("/foo/"), Format("m", minl=1, maxl=-1), Exact("/"), Format("n", minl=3, maxl=5), Exact("bar")
+# /*                -> Exact("/"), Format("_")
+# /foo/*bar         -> Exact("/foo/"), Format("_"), Exact("bar")
+# /foo/*/bar        -> Exact("/foo/"), Format("_"), Exact("/bar")
+# /foo/**/bar       -> Exact("/foo/"), Format("_", ignore_sep=True), Exact("/bar")
+
+# ["foo", Format("m", minl=1, maxl=-1), [Format("n", minl=3, maxl=5), "bar"], "*"]
+
+
+import ctypes
+
+dll = ctypes.CDLL("./c_route.so")
+dll.parse_route.restype = type("c_char_alloc", (ctypes.c_char_p,), {})
+dll.free_parsed_route.argtypes = (ctypes.c_void_p,)
+dll.free_parsed_route.restype = None
+
+
+def compile_route(pattern: str) -> list[bytes]:
+    if pattern[0] != "/":
+        from app.exceptions import ParseError
+        raise ParseError("The first character in route pattern must be '/'.")
+
+    # res: list[str] = []
+    # for path in pattern[1:].split("/"):
+    #     if (star_idx := path.find("*")) != -1:
+    #         path = "".join((path[:star_idx], "{_}", path[star_idx + 1:]))
+    #     if "{" not in path and "}" not in path and "*" not in path:
+    #         res.append(path)
+
+    outlen = ctypes.c_size_t()
+    data = pattern[1:].encode()
+    ret = dll.parse_route(data, len(data), ctypes.byref(outlen))
+    res = ctypes.string_at(ret, outlen.value - 2).split(b"\x01")
+    dll.free_parsed_route(ret)
+
+    return res
+
+
+if __name__ == "__main__":
+    print(compile_route("/foo/{n:5}foo/bar/**/baz"))
+    print(compile_route("/"))