138 lines
4.9 KiB
Python
138 lines
4.9 KiB
Python
import base64
|
|
import re
|
|
from concurrent.futures import ThreadPoolExecutor
|
|
from http.server import BaseHTTPRequestHandler
|
|
from threading import Lock
|
|
|
|
import multibase
|
|
from multiaddr import Multiaddr
|
|
|
|
from reflex_cache import db, ipfs, nix_cache, util
|
|
|
|
|
|
class ReflexHTTPServiceHandler(BaseHTTPRequestHandler):
|
|
_workSet = set()
|
|
_workSetLock = Lock()
|
|
_executor_nar = ThreadPoolExecutor(8)
|
|
# _executor_narinfo = ThreadPoolExecutor(16) # for narinfo uploads - TODO
|
|
|
|
_db = db.ReflexDB(util.envOr("CACHE_DIRECTORY", "/var/tmp"))
|
|
|
|
_nix = nix_cache.NixCacheFetcher(
|
|
util.envOr("NIX_CACHES", "https://cache.nixos.org").split(" ")
|
|
)
|
|
|
|
_ipfs = ipfs.IPFSController(Multiaddr(util.envOrRaise("IPFS_API")), _nix, _db)
|
|
|
|
def do_HEAD(self):
|
|
if self.path.endswith(".narinfo"):
|
|
print(f"NAR info request: {self.path}")
|
|
code, content = self._nix.try_all("head", self.path)
|
|
self.send_response(code)
|
|
self.end_headers()
|
|
else:
|
|
self.send_response(404)
|
|
self.end_headers()
|
|
|
|
def do_GET(self):
|
|
if self.path.startswith("/nix-cache-info"):
|
|
self.send_response(200)
|
|
self.end_headers()
|
|
self.wfile.write(b"StoreDir: /nix/store\n")
|
|
return
|
|
|
|
elif self.path.startswith("/nar/"):
|
|
resultHash = self._db.get_path(self.path)
|
|
|
|
if resultHash == None:
|
|
with self._workSetLock:
|
|
found = False
|
|
for (itemNar, itemFuture) in self._workSet:
|
|
if itemNar == self.path:
|
|
f = itemFuture
|
|
print(
|
|
f"IPFS fetch task for {self.path} already being processed"
|
|
)
|
|
found = True
|
|
break
|
|
|
|
if not found:
|
|
print(f"Creating new IPFS fetch task for {self.path}")
|
|
f = self._executor_nar.submit(
|
|
self._ipfs.ipfs_fetch_task, self.path
|
|
)
|
|
self._workSet.add((self.path, f))
|
|
|
|
resultNar, code, resultHash = f.result()
|
|
|
|
with self._workSetLock:
|
|
try:
|
|
self._workSet.remove((self.path, f))
|
|
except KeyError:
|
|
# already removed
|
|
pass
|
|
else:
|
|
code = 200
|
|
|
|
if code != 200:
|
|
self.send_response(code)
|
|
self.end_headers()
|
|
return
|
|
|
|
self.send_response(302)
|
|
|
|
# not used for auth, but for defining a redirect target
|
|
auth = self.headers.get("Authorization")
|
|
if auth:
|
|
try:
|
|
decoded1 = base64.b64decode(
|
|
auth.removeprefix("Basic ")
|
|
).removesuffix(b":")
|
|
if decoded1.isdigit():
|
|
redirect = f"http://127.0.0.1:{decoded1.decode('utf-8')}"
|
|
else:
|
|
redirect = multibase.decode(decoded1).decode("utf-8")
|
|
except Exception:
|
|
redirect = "http://127.0.0.1:8080"
|
|
else:
|
|
redirect = "http://127.0.0.1:8080"
|
|
|
|
self.send_header("Location", f"{redirect}/ipfs/{resultHash}")
|
|
self.send_header("X-Ipfs-Path", f"/ipfs/{resultHash}")
|
|
self.end_headers()
|
|
return
|
|
|
|
elif self.path.endswith(".narinfo"):
|
|
print(f"NAR info request: {self.path}")
|
|
code, content = self._nix.try_all("get", self.path)
|
|
self.send_response(code)
|
|
self.end_headers()
|
|
if code == 200:
|
|
self.wfile.write(content)
|
|
if match := re.search(
|
|
"URL: (nar/[a-z0-9]*\\.nar.*)", content.decode("utf-8")
|
|
):
|
|
nar = f"/{match.group(1)}"
|
|
if not self._db.get_path(nar):
|
|
with self._workSetLock:
|
|
found = False
|
|
for (itemNar, itemFuture) in self._workSet:
|
|
if itemNar == nar:
|
|
found = True
|
|
break
|
|
|
|
if not found and len(self._workSet) < 8:
|
|
print(f"Pre-flight: creating IPFS fetch task for {nar}")
|
|
f = self._executor_nar.submit(
|
|
self._ipfs.ipfs_fetch_task, nar
|
|
)
|
|
self._workSet.add((nar, f))
|
|
return
|
|
|
|
else:
|
|
code = 404
|
|
|
|
if code > 299:
|
|
self.send_response(code)
|
|
self.end_headers()
|
|
return
|