irl4you-pip/srv/static.py at main · IRL4YOU/irl4you-pip

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import gzip

import hashlib

import os

import re

import threading

from srv.util import BASE_DIR, WEB_DIR, read

TYPES = {".js": "application/javascript; charset=utf-8", ".css": "text/css; charset=utf-8", ".html": "text/html; charset=utf-8", ".json": "application/json; charset=utf-8"}

MIN_GZ = 600

class WebFiles:

def __init__(self, root=None, version=None):

self.root = root or WEB_DIR

self.version = (version if version is not None else (read(os.path.join(BASE_DIR, "VERSION"), "") or "")).strip()

self.cache = {}

self.lock = threading.Lock()

def entry(self, name, page=False):

path = os.path.join(self.root, name)

try:

st = os.stat(path)

except OSError:

return None

sig = (st.st_mtime_ns, st.st_size)

hit = self.cache.get((name, page))

if hit is not None and hit["sig"] == sig:

return hit

try:

with open(path, "rb") as f:

body = f.read()

except OSError:

return None

if page:

body = body.replace(b"__V__", self.version.encode("ascii", "replace"))

gz = gzip.compress(body, 6, mtime=0) if len(body) >= MIN_GZ else None

tag = hashlib.sha1(body).hexdigest()[:20]

e = {"sig": sig, "body": body, "gz": gz if gz is not None and len(gz) < len(body) else None, "etag": '"%s"' % tag, "etag_gz": '"%s-gz"' % tag,

"ctype": TYPES.get(os.path.splitext(name)[1], "application/octet-stream")}

with self.lock:

self.cache[(name, page)] = e

return e

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