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SiteStorage.py
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SiteStorage.py
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import os
import re
import shutil
import json
import time
import errno
from collections import defaultdict
import sqlite3
import gevent.event
import util
from util import SafeRe
from Db.Db import Db
from Debug import Debug
from Config import config
from util import helper
from util import ThreadPool
from Plugin import PluginManager
from Translate import translate as _
thread_pool_fs_read = ThreadPool.ThreadPool(config.threads_fs_read, name="FS read")
thread_pool_fs_write = ThreadPool.ThreadPool(config.threads_fs_write, name="FS write")
thread_pool_fs_batch = ThreadPool.ThreadPool(1, name="FS batch")
@PluginManager.acceptPlugins
class SiteStorage(object):
def __init__(self, site, allow_create=True):
self.site = site
self.directory = "%s/%s" % (config.data_dir, self.site.address) # Site data diretory
self.allowed_dir = os.path.abspath(self.directory) # Only serve file within this dir
self.log = site.log
self.db = None # Db class
self.db_checked = False # Checked db tables since startup
self.event_db_busy = None # Gevent AsyncResult if db is working on rebuild
self.has_db = self.isFile("dbschema.json") # The site has schema
if not os.path.isdir(self.directory):
if allow_create:
os.mkdir(self.directory) # Create directory if not found
else:
raise Exception("Directory not exists: %s" % self.directory)
def getDbFile(self):
if self.db:
return self.db.schema["db_file"]
else:
if self.isFile("dbschema.json"):
schema = self.loadJson("dbschema.json")
return schema["db_file"]
else:
return False
# Create new databaseobject with the site's schema
def openDb(self, close_idle=False):
schema = self.getDbSchema()
db_path = self.getPath(schema["db_file"])
return Db(schema, db_path, close_idle=close_idle)
def closeDb(self, reason="Unknown (SiteStorage)"):
if self.db:
self.db.close(reason)
self.event_db_busy = None
self.db = None
def getDbSchema(self):
try:
self.site.needFile("dbschema.json")
schema = self.loadJson("dbschema.json")
except Exception as err:
raise Exception("dbschema.json is not a valid JSON: %s" % err)
return schema
def loadDb(self):
self.log.debug("No database, waiting for dbschema.json...")
self.site.needFile("dbschema.json", priority=3)
self.log.debug("Got dbschema.json")
self.has_db = self.isFile("dbschema.json") # Recheck if dbschema exist
if self.has_db:
schema = self.getDbSchema()
db_path = self.getPath(schema["db_file"])
if not os.path.isfile(db_path) or os.path.getsize(db_path) == 0:
try:
self.rebuildDb(reason="Missing database")
except Exception as err:
self.log.error(err)
pass
if self.db:
self.db.close("Gettig new db for SiteStorage")
self.db = self.openDb(close_idle=True)
try:
changed_tables = self.db.checkTables()
if changed_tables:
self.rebuildDb(delete_db=False, reason="Changed tables") # TODO: only update the changed table datas
except sqlite3.OperationalError:
pass
# Return db class
@util.Noparallel()
def getDb(self):
if self.event_db_busy: # Db not ready for queries
self.log.debug("Wating for db...")
self.event_db_busy.get() # Wait for event
if not self.db:
self.loadDb()
return self.db
def updateDbFile(self, inner_path, file=None, cur=None):
path = self.getPath(inner_path)
if cur:
db = cur.db
else:
db = self.getDb()
return db.updateJson(path, file, cur)
# Return possible db files for the site
@thread_pool_fs_read.wrap
def getDbFiles(self):
found = 0
for content_inner_path, content in self.site.content_manager.contents.items():
# content.json file itself
if self.isFile(content_inner_path):
yield content_inner_path, self.getPath(content_inner_path)
else:
self.log.debug("[MISSING] %s" % content_inner_path)
# Data files in content.json
content_inner_path_dir = helper.getDirname(content_inner_path) # Content.json dir relative to site
for file_relative_path in list(content.get("files", {}).keys()) + list(content.get("files_optional", {}).keys()):
if not file_relative_path.endswith(".json") and not file_relative_path.endswith("json.gz"):
continue # We only interesed in json files
file_inner_path = content_inner_path_dir + file_relative_path # File Relative to site dir
file_inner_path = file_inner_path.strip("/") # Strip leading /
if self.isFile(file_inner_path):
yield file_inner_path, self.getPath(file_inner_path)
else:
self.log.debug("[MISSING] %s" % file_inner_path)
found += 1
if found % 100 == 0:
time.sleep(0.001) # Context switch to avoid UI block
# Rebuild sql cache
@util.Noparallel()
@thread_pool_fs_batch.wrap
def rebuildDb(self, delete_db=True, reason="Unknown"):
self.log.info("Rebuilding db (reason: %s)..." % reason)
self.has_db = self.isFile("dbschema.json")
if not self.has_db:
return False
schema = self.loadJson("dbschema.json")
db_path = self.getPath(schema["db_file"])
if os.path.isfile(db_path) and delete_db:
if self.db:
self.closeDb("rebuilding") # Close db if open
time.sleep(0.5)
self.log.info("Deleting %s" % db_path)
try:
os.unlink(db_path)
except Exception as err:
self.log.error("Delete error: %s" % err)
if not self.db:
self.db = self.openDb()
self.event_db_busy = gevent.event.AsyncResult()
self.log.info("Rebuild: Creating tables...")
# raise DbTableError if not valid
self.db.checkTables()
cur = self.db.getCursor()
cur.logging = False
s = time.time()
self.log.info("Rebuild: Getting db files...")
db_files = list(self.getDbFiles())
num_imported = 0
num_total = len(db_files)
num_error = 0
self.log.info("Rebuild: Importing data...")
try:
if num_total > 100:
self.site.messageWebsocket(
_["Database rebuilding...<br>Imported {0} of {1} files (error: {2})..."].format(
"0000", num_total, num_error
), "rebuild", 0
)
for file_inner_path, file_path in db_files:
try:
if self.updateDbFile(file_inner_path, file=open(file_path, "rb"), cur=cur):
num_imported += 1
except Exception as err:
self.log.error("Error importing %s: %s" % (file_inner_path, Debug.formatException(err)))
num_error += 1
if num_imported and num_imported % 100 == 0:
self.site.messageWebsocket(
_["Database rebuilding...<br>Imported {0} of {1} files (error: {2})..."].format(
num_imported, num_total, num_error
),
"rebuild", int(float(num_imported) / num_total * 100)
)
time.sleep(0.001) # Context switch to avoid UI block
finally:
cur.close()
if num_total > 100:
self.site.messageWebsocket(
_["Database rebuilding...<br>Imported {0} of {1} files (error: {2})..."].format(
num_imported, num_total, num_error
), "rebuild", 100
)
self.log.info("Rebuild: Imported %s data file in %.3fs" % (num_imported, time.time() - s))
self.event_db_busy.set(True) # Event done, notify waiters
self.event_db_busy = None # Clear event
self.db.commit("Rebuilt")
return True
# Execute sql query or rebuild on dberror
def query(self, query, params=None):
if not query.strip().upper().startswith("SELECT"):
raise Exception("Only SELECT query supported")
try:
res = self.getDb().execute(query, params)
except sqlite3.DatabaseError as err:
if err.__class__.__name__ == "DatabaseError":
self.log.error("Database error: %s, query: %s, try to rebuilding it..." % (err, query))
try:
self.rebuildDb(reason="Query error")
except sqlite3.OperationalError:
pass
res = self.db.cur.execute(query, params)
else:
raise err
return res
def ensureDir(self, inner_path):
try:
os.makedirs(self.getPath(inner_path))
except OSError as err:
if err.errno == errno.EEXIST:
return False
else:
raise err
return True
# Open file object
def open(self, inner_path, mode="rb", create_dirs=False, **kwargs):
file_path = self.getPath(inner_path)
if create_dirs:
file_inner_dir = os.path.dirname(inner_path)
self.ensureDir(file_inner_dir)
return open(file_path, mode, **kwargs)
# Open file object
@thread_pool_fs_read.wrap
def read(self, inner_path, mode="rb"):
return open(self.getPath(inner_path), mode).read()
@thread_pool_fs_write.wrap
def writeThread(self, inner_path, content):
file_path = self.getPath(inner_path)
# Create dir if not exist
self.ensureDir(os.path.dirname(inner_path))
# Write file
if hasattr(content, 'read'): # File-like object
with open(file_path, "wb") as file:
shutil.copyfileobj(content, file) # Write buff to disk
else: # Simple string
if inner_path == "content.json" and os.path.isfile(file_path):
helper.atomicWrite(file_path, content)
else:
with open(file_path, "wb") as file:
file.write(content)
# Write content to file
def write(self, inner_path, content):
self.writeThread(inner_path, content)
self.onUpdated(inner_path)
# Remove file from filesystem
def delete(self, inner_path):
file_path = self.getPath(inner_path)
os.unlink(file_path)
self.onUpdated(inner_path, file=False)
def deleteDir(self, inner_path):
dir_path = self.getPath(inner_path)
os.rmdir(dir_path)
def rename(self, inner_path_before, inner_path_after):
for retry in range(3):
rename_err = None
# To workaround "The process cannot access the file beacause it is being used by another process." error
try:
os.rename(self.getPath(inner_path_before), self.getPath(inner_path_after))
break
except Exception as err:
rename_err = err
self.log.error("%s rename error: %s (retry #%s)" % (inner_path_before, err, retry))
time.sleep(0.1 + retry)
if rename_err:
raise rename_err
# List files from a directory
@thread_pool_fs_read.wrap
def walk(self, dir_inner_path, ignore=None):
directory = self.getPath(dir_inner_path)
for root, dirs, files in os.walk(directory):
root = root.replace("\\", "/")
root_relative_path = re.sub("^%s" % re.escape(directory), "", root).lstrip("/")
for file_name in files:
if root_relative_path: # Not root dir
file_relative_path = root_relative_path + "/" + file_name
else:
file_relative_path = file_name
if ignore and SafeRe.match(ignore, file_relative_path):
continue
yield file_relative_path
# Don't scan directory that is in the ignore pattern
if ignore:
dirs_filtered = []
for dir_name in dirs:
if root_relative_path:
dir_relative_path = root_relative_path + "/" + dir_name
else:
dir_relative_path = dir_name
if ignore == ".*" or re.match(".*([|(]|^)%s([|)]|$)" % re.escape(dir_relative_path + "/.*"), ignore):
continue
dirs_filtered.append(dir_name)
dirs[:] = dirs_filtered
# list directories in a directory
@thread_pool_fs_read.wrap
def list(self, dir_inner_path):
directory = self.getPath(dir_inner_path)
return os.listdir(directory)
# Site content updated
def onUpdated(self, inner_path, file=None):
# Update Sql cache
should_load_to_db = inner_path.endswith(".json") or inner_path.endswith(".json.gz")
if inner_path == "dbschema.json":
self.has_db = self.isFile("dbschema.json")
# Reopen DB to check changes
if self.has_db:
self.closeDb("New dbschema")
gevent.spawn(self.getDb)
elif not config.disable_db and should_load_to_db and self.has_db: # Load json file to db
if config.verbose:
self.log.debug("Loading json file to db: %s (file: %s)" % (inner_path, file))
try:
self.updateDbFile(inner_path, file)
except Exception as err:
self.log.error("Json %s load error: %s" % (inner_path, Debug.formatException(err)))
self.closeDb("Json load error")
# Load and parse json file
@thread_pool_fs_read.wrap
def loadJson(self, inner_path):
with self.open(inner_path, "r", encoding="utf8") as file:
return json.load(file)
# Write formatted json file
def writeJson(self, inner_path, data):
# Write to disk
self.write(inner_path, helper.jsonDumps(data).encode("utf8"))
# Get file size
def getSize(self, inner_path):
path = self.getPath(inner_path)
try:
return os.path.getsize(path)
except Exception:
return 0
# File exist
def isFile(self, inner_path):
return os.path.isfile(self.getPath(inner_path))
# File or directory exist
def isExists(self, inner_path):
return os.path.exists(self.getPath(inner_path))
# Dir exist
def isDir(self, inner_path):
return os.path.isdir(self.getPath(inner_path))
# Security check and return path of site's file
def getPath(self, inner_path):
inner_path = inner_path.replace("\\", "/") # Windows separator fix
if not inner_path:
return self.directory
if "../" in inner_path:
raise Exception("File not allowed: %s" % inner_path)
return "%s/%s" % (self.directory, inner_path)
# Get site dir relative path
def getInnerPath(self, path):
if path == self.directory:
inner_path = ""
else:
if path.startswith(self.directory):
inner_path = path[len(self.directory) + 1:]
else:
raise Exception("File not allowed: %s" % path)
return inner_path
# Verify all files b3sum using content.json
def verifyFiles(self, quick_check=False, add_optional=False, add_changed=True):
bad_files = []
back = defaultdict(int)
back["bad_files"] = bad_files
i = 0
self.log.debug("Verifing files...")
if not self.site.content_manager.contents.get("content.json"): # No content.json, download it first
self.log.debug("VerifyFile content.json not exists")
self.site.needFile("content.json", update=True) # Force update to fix corrupt file
self.site.content_manager.loadContent() # Reload content.json
for content_inner_path, content in list(self.site.content_manager.contents.items()):
back["num_content"] += 1
i += 1
if i % 50 == 0:
time.sleep(0.001) # Context switch to avoid gevent hangs
if not os.path.isfile(self.getPath(content_inner_path)): # Missing content.json file
back["num_content_missing"] += 1
self.log.debug("[MISSING] %s" % content_inner_path)
bad_files.append(content_inner_path)
for file_relative_path in list(content.get("files", {}).keys()):
back["num_file"] += 1
file_inner_path = helper.getDirname(content_inner_path) + file_relative_path # Relative to site dir
file_inner_path = file_inner_path.strip("/") # Strip leading /
file_path = self.getPath(file_inner_path)
if not os.path.isfile(file_path):
back["num_file_missing"] += 1
self.log.debug("[MISSING] %s" % file_inner_path)
bad_files.append(file_inner_path)
continue
if quick_check:
ok = os.path.getsize(file_path) == content["files"][file_relative_path]["size"]
if not ok:
err = "Invalid size"
else:
try:
ok = self.site.content_manager.verifyFile(file_inner_path, open(file_path, "rb"))
except Exception as err:
ok = False
if not ok:
back["num_file_invalid"] += 1
self.log.debug("[INVALID] %s: %s" % (file_inner_path, err))
if add_changed or content.get("cert_user_id"): # If updating own site only add changed user files
bad_files.append(file_inner_path)
# Optional files
optional_added = 0
optional_removed = 0
for file_relative_path in list(content.get("files_optional", {}).keys()):
back["num_optional"] += 1
file_node = content["files_optional"][file_relative_path]
file_inner_path = helper.getDirname(content_inner_path) + file_relative_path # Relative to site dir
file_inner_path = file_inner_path.strip("/") # Strip leading /
file_path = self.getPath(file_inner_path)
hash_id = self.site.content_manager.hashfield.getHashId(file_node["blake3"])
if not os.path.isfile(file_path):
if self.site.content_manager.isDownloaded(file_inner_path, hash_id):
back["num_optional_removed"] += 1
self.log.debug("[OPTIONAL MISSING] %s" % file_inner_path)
self.site.content_manager.optionalRemoved(file_inner_path, hash_id, file_node["size"])
if add_optional and self.site.isDownloadable(file_inner_path):
self.log.debug("[OPTIONAL ADDING] %s" % file_inner_path)
bad_files.append(file_inner_path)
continue
if quick_check:
ok = os.path.getsize(file_path) == content["files_optional"][file_relative_path]["size"]
else:
try:
ok = self.site.content_manager.verifyFile(file_inner_path, open(file_path, "rb"))
except Exception as err:
ok = False
if ok:
if not self.site.content_manager.isDownloaded(file_inner_path, hash_id):
back["num_optional_added"] += 1
self.site.content_manager.optionalDownloaded(file_inner_path, hash_id, file_node["size"])
optional_added += 1
self.log.debug("[OPTIONAL FOUND] %s" % file_inner_path)
else:
if self.site.content_manager.isDownloaded(file_inner_path, hash_id):
back["num_optional_removed"] += 1
self.site.content_manager.optionalRemoved(file_inner_path, hash_id, file_node["size"])
optional_removed += 1
bad_files.append(file_inner_path)
self.log.debug("[OPTIONAL CHANGED] %s" % file_inner_path)
if config.verbose:
self.log.debug(
"%s verified: %s, quick: %s, optionals: +%s -%s" %
(content_inner_path, len(content["files"]), quick_check, optional_added, optional_removed)
)
self.site.content_manager.contents.db.processDelayed()
time.sleep(0.001) # Context switch to avoid gevent hangs
return back
# Check and try to fix site files integrity
def updateBadFiles(self, quick_check=True):
s = time.time()
res = self.verifyFiles(
quick_check,
add_optional=True,
add_changed=not self.site.settings.get("own") # Don't overwrite changed files if site owned
)
bad_files = res["bad_files"]
self.site.bad_files = {}
if bad_files:
for bad_file in bad_files:
self.site.bad_files[bad_file] = 1
self.log.debug("Checked files in %.2fs... Found bad files: %s, Quick:%s" % (time.time() - s, len(bad_files), quick_check))
# Delete site's all file
@thread_pool_fs_batch.wrap
def deleteFiles(self):
site_title = self.site.content_manager.contents.get("content.json", {}).get("title", self.site.address)
message_id = "delete-%s" % self.site.address
self.log.debug("Deleting files from content.json (title: %s)..." % site_title)
files = [] # Get filenames
content_inner_paths = list(self.site.content_manager.contents.keys())
for i, content_inner_path in enumerate(content_inner_paths):
content = self.site.content_manager.contents.get(content_inner_path, {})
files.append(content_inner_path)
# Add normal files
for file_relative_path in list(content.get("files", {}).keys()):
file_inner_path = helper.getDirname(content_inner_path) + file_relative_path # Relative to site dir
files.append(file_inner_path)
# Add optional files
for file_relative_path in list(content.get("files_optional", {}).keys()):
file_inner_path = helper.getDirname(content_inner_path) + file_relative_path # Relative to site dir
files.append(file_inner_path)
if i % 100 == 0:
num_files = len(files)
self.site.messageWebsocket(
_("Deleting site <b>{site_title}</b>...<br>Collected {num_files} files"),
message_id, (i / len(content_inner_paths)) * 25
)
if self.isFile("dbschema.json"):
self.log.debug("Deleting db file...")
self.closeDb("Deleting site")
self.has_db = False
try:
schema = self.loadJson("dbschema.json")
db_path = self.getPath(schema["db_file"])
if os.path.isfile(db_path):
os.unlink(db_path)
except Exception as err:
self.log.error("Db file delete error: %s" % err)
num_files = len(files)
for i, inner_path in enumerate(files):
path = self.getPath(inner_path)
if os.path.isfile(path):
for retry in range(5):
try:
os.unlink(path)
break
except Exception as err:
self.log.error("Error removing %s: %s, try #%s" % (inner_path, err, retry))
time.sleep(float(retry) / 10)
if i % 100 == 0:
self.site.messageWebsocket(
_("Deleting site <b>{site_title}</b>...<br>Deleting file {i}/{num_files}"),
message_id, 25 + (i / num_files) * 50
)
self.onUpdated(inner_path, False)
self.log.debug("Deleting empty dirs...")
i = 0
for root, dirs, files in os.walk(self.directory, topdown=False):
for dir in dirs:
path = os.path.join(root, dir)
if os.path.isdir(path):
try:
i += 1
if i % 100 == 0:
self.site.messageWebsocket(
_("Deleting site <b>{site_title}</b>...<br>Deleting empty directories {i}"),
message_id, 85
)
os.rmdir(path)
except OSError: # Not empty
pass
if os.path.isdir(self.directory) and os.listdir(self.directory) == []:
os.rmdir(self.directory) # Remove sites directory if empty
if os.path.isdir(self.directory):
self.log.debug("Some unknown file remained in site data dir: %s..." % self.directory)
self.site.messageWebsocket(
_("Deleting site <b>{site_title}</b>...<br>Site deleted, but some unknown files left in the directory"),
message_id, 100
)
return False # Some files not deleted
else:
self.log.debug("Site %s data directory deleted: %s..." % (site_title, self.directory))
self.site.messageWebsocket(
_("Deleting site <b>{site_title}</b>...<br>All files deleted successfully"),
message_id, 100
)
return True # All clean