forked from importers/git-importer
Migrate the ProxySHA256 data into postgresql DB
The calculation of the sha256 and the mimetype is local due to that
This commit is contained in:
Stephan Kulow
@@ -1,114 +1,142 @@
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import functools
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import hashlib
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import logging
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import urllib
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import os
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try:
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import magic
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except:
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print("Install python3-python-magic, not python3-magic")
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raise
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import requests
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def _hash(hash_alg, file_or_path):
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h = hash_alg()
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def __hash(f):
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while chunk := f.read(1024 * 4):
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h.update(chunk)
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if hasattr(file_or_path, "read"):
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__hash(file_or_path)
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else:
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with file_or_path.open("rb") as f:
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__hash(f)
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return h.hexdigest()
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md5 = functools.partial(_hash, hashlib.md5)
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sha256 = functools.partial(_hash, hashlib.sha256)
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from lib.db import DB
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from lib.obs import OBS
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class ProxySHA256:
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def __init__(self, obs, url=None, enabled=True):
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def __init__(self, obs: OBS, db: DB):
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self.obs = obs
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self.url = url if url else "http://source.dyn.cloud.suse.de"
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self.enabled = enabled
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self.db = db
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self.hashes = None
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self.texts = None
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def load_package(self, package):
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# _project is unreachable for the proxy - due to being a fake package
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if package == "_project":
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self.enabled = False
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self.texts = set(["_config", "_service", "_staging_workflow"])
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self.hashes = dict()
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return
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logging.debug("Retrieve all previously defined SHA256")
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response = requests.get(
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f"http://source.dyn.cloud.suse.de/package/{package}", timeout=50
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)
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if response.status_code == 200:
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json = response.json()
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self.hashes = json["shas"]
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self.texts = set(json["texts"])
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self.mime = None
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def get(self, package, name, file_md5):
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key = f"{file_md5}-{name}"
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if self.hashes is None:
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if self.enabled:
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self.load_package(package)
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else:
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self.hashes = {}
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return self.hashes.get(key, None)
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self.load_hashes(package)
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key = f"{file_md5}-{name}"
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ret = self.hashes.get(key)
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return ret
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def _proxy_put(self, project, package, name, revision, file_md5, size):
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quoted_name = urllib.parse.quote(name)
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url = f"{self.obs.url}/public/source/{project}/{package}/{quoted_name}?rev={revision}"
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response = requests.put(
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self.url,
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data={
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"hash": file_md5,
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"filename": name,
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"url": url,
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"package": package,
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},
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timeout=10,
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)
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if response.status_code != 200:
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raise Exception(f"Redirector error on {self.url} for {url}")
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key = (file_md5, name)
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self.hashes[key] = {
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"sha256": response.content.decode("utf-8"),
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"fsize": size,
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}
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return self.hashes[key]
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def _obs_put(self, project, package, name, revision, file_md5, size):
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key = (file_md5, name)
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self.hashes[key] = {
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"sha256": sha256(self.obs._download(project, package, name, revision)),
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"fsize": size,
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}
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return self.hashes[key]
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def load_hashes(self, package):
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with self.db.cursor() as cur:
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cur.execute(
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"""SELECT lfs_oids.file_md5,lop.filename,lfs_oids.sha256,lfs_oids.size
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FROM lfs_oid_in_package lop
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JOIN lfs_oids ON lfs_oids.id=lop.lfs_oid_id
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WHERE lop.package=%s""",
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(package,),
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)
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self.hashes = {
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f"{row[0]}-{row[1]}": (row[2], row[3]) for row in cur.fetchall()
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}
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def put(self, project, package, name, revision, file_md5, size):
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if not self.enabled:
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return self._obs_put(project, package, name, revision, file_md5, size)
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return self._proxy_put(project, package, name, revision, file_md5, size)
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if not self.mime:
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self.mime = magic.Magic(mime=True)
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mimetype = None
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logging.debug(f"Add LFS for {project}/{package}/{name}")
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fin = self.obs._download(project, package, name, revision)
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sha = hashlib.sha256()
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while True:
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buffer = fin.read(10000)
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if not buffer:
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break
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sha.update(buffer)
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# only guess from the first 10K
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if not mimetype:
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mimetype = self.mime.from_buffer(buffer)
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fin.close()
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sha = sha.hexdigest()
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with self.db.cursor() as cur:
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# we UPDATE here so the return functions. conflicts are likely as we look for filename/md5 but conflict on sha256
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cur.execute(
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"""INSERT INTO lfs_oids (project,package,filename,rev,sha256,size,mimetype,file_md5)
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VALUES (%s,%s,%s,%s,%s,%s,%s,%s)
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ON CONFLICT (sha256,size) DO UPDATE SET mimetype=EXCLUDED.mimetype
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RETURNING id""",
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(
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project,
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package,
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name,
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revision,
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sha,
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size,
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mimetype,
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file_md5,
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),
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)
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row = cur.fetchone()
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lfs_oid_id = row[0]
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cur.execute(
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"""INSERT INTO lfs_oid_in_package (package,filename,lfs_oid_id)
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VALUES (%s,%s,%s)""",
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(package, name, lfs_oid_id),
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)
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if mimetype.startswith("text/"):
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cur.execute(
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"INSERT INTO text_files (package,filename) VALUES (%s,%s)",
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(package, name),
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)
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self.db.conn.commit()
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if os.getenv("GITEA_REGISTER_SECRET"):
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data = {
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"secret": os.getenv("GITEA_REGISTER_SECRET"),
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"project": project,
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"package": package,
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"filename": name,
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"rev": revision,
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"sha256": sha,
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"size": size,
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}
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url = "http://gitea.opensuse.org:9999/register"
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response = requests.post(
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url,
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data=data,
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timeout=10,
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)
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logging.debug(f"Registered {response.status_code}")
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else:
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logging.info("Not registering LFS due to missing secret")
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# reset
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self.hashes = None
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self.texts = None
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return self.get(package, name, file_md5)
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def is_text(self, package, filename):
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if self.texts is None:
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if self.enabled:
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self.load_package(package)
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else:
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self.texts = set()
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self.load_texts(package)
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return filename in self.texts
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def load_texts(self, package):
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self.texts = set()
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with self.db.cursor() as cur:
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cur.execute("SELECT filename from text_files where package=%s", (package,))
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for row in cur.fetchall():
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self.texts.add(row[0])
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def get_or_put(self, project, package, name, revision, file_md5, size):
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result = self.get(package, name, file_md5)
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if not result:
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result = self.put(project, package, name, revision, file_md5, size)
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# Sanity check
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if result["fsize"] != size:
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raise Exception(f"Redirector has different size for {name}")
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sha256, db_size = result
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assert db_size == size
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return result
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return sha256
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