Juan-Carlos Gandhi (![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png)
juan_gandhi) wrote2026-02-16 02:28 pm
juan_gandhi) wrote2026-02-16 02:28 pm
накарябал на питоне
Если покажете на какую-нибудь чушь, буду благодарен.
import os, time
from pathlib import Path
DIR="cache"
CACHEPATH = Path(DIR)
TTL=12*3600 # 12 hours
if not os.path.exists(DIR):
os.mkdir(DIR)
def path(key: str) -> Path:
return CACHEPATH / key.replace("/", "∕").replace(".", "｡")
def clear(key: str):
p = path(key)
if p.exists():
p.unlink()
def clearAll():
for p in list(CACHEPATH.iterdir()): p.unlink()
def isFresh(key: str) -> bool:
p = path(key)
if p.exists():
return time.time() < p.stat().st_mtime + TTL
else:
return False
def get(key: str) -> str:
if isFresh(key): return path(key).read_text(encoding='utf-8')
def put(key: str, value: str):
path(key).write_text(value)
def getOrCall(key: str, fun):
value = get(key)
if value == None:
value = fun(key)
put(key, value)
return value
if __name__ == "__main__":
# test the cache
TTL = 1
print("TESTING cache.py")
clearAll()
clear("non existent file")
testvalue = "--test contents\nof file 'test1'--"
put("test1", testvalue)
fromfile = get("test1")
assert fromfile == testvalue, f"Oops, bad input: {fromfile}"
clear("test1")
assert not os.path.exists("test1"), "the file 'test' had to be deleted"
put("test2", "this file gets expired soon")
fromfile2a = get("test2")
assert fromfile2a == "this file gets expired soon", "Oops, bad file test2"
time.sleep(2)
fromfile2b = get("test2")
assert fromfile2b == None, "Oops, test2 still available?!"
value1 = getOrCall("test3", lambda key: f"[[{key}-1]]")
assert value1 == "[[test3-1]]", "first call of test3, got {value1}"
value2 = getOrCall("test3", lambda key: f"[[{key}-88]]")
assert value2 == "[[test3-1]]", f"second call of test3, got {value2}"
time.sleep(2)
value3 = getOrCall("test3", lambda key: f"[[{key}-3]]")
assert value3 == "[[test3-3]]", "third call of test3, got {value3}"
put("url/", "somedata")
fromfile4 = get("url/")
assert fromfile4 == "somedata", "problem with url/"
url=".http://dreamwidth.org/juan-gandhi/something"
put(url, "slashes in key")
fromUrl = get(url)
assert fromUrl == "slashes in key", f"failed reading from {url}"
print("DONE TESTING cache.py")
