thumb server base work
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c3fb648ec3
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636a386ec4
@ -28,8 +28,7 @@ def get_db_engine(uri, debug=False):
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return engine
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def get_db_session(uri):
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engine = get_db_engine(uri)
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def create_db_sessionmaker(engine):
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session = sessionmaker()
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session.configure(bind=engine)
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return session
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223
photoapp/thumbserver.py
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223
photoapp/thumbserver.py
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@ -0,0 +1,223 @@
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import os
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import logging
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import cherrypy
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import shutil
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import tempfile
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import traceback
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from threading import Thread
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from contextlib import closing
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from queue import Queue, Empty
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from subprocess import check_call
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from photoapp.dbutils import SAEnginePlugin, SATool, db, get_db_engine, create_db_sessionmaker
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from photoapp.storage import uri_to_storage
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from photoapp.api import PhotosApi, LibraryManager
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from photoapp.types import User, Photo
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from photoapp.utils import require_auth
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from photoapp.common import pwhash
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from photoapp.dbsession import DatabaseSession
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from photoapp.thumb import ThumbGenerator
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def get_video_thumb(srcpath, outpath):
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#TODO
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# download the video file
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# use `ffmpeg -i filename.flv` to inspect the video, parse output for duration
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# take a thumb halfway through the video
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cmd = [
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"ffmpeg",
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"-i", srcpath,
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"-vframes", "1", # Output one frame
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"-an", # Disable audio
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# "-s", "400x222" # Output size
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"-ss", "1", # grab the frame from 1 second into the video
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outpath
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]
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check_call(cmd)
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def setup_thumb_user(engine):
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#TODO create the internal User used to talk to this service
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# if user doesnt exist
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# create
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# log the password
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pass
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class ThumbWorker(Thread):
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def __init__(self, engine, library, cache, thumbtool):
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super().__init__()
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self.daemon = True
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self.queue = Queue()
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self.engine = engine
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self.library = library
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self.cache = cache
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self.thumbtool = thumbtool
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def run(self):
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while True:
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try:
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image_uuid, style_name = self.queue.get(block=True, timeout=5.0)
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except Empty:
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continue
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try:
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with (
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closing(create_db_sessionmaker(self.engine)()) as s,
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tempfile.TemporaryDirectory() as d,
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):
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self.do_thumb(image_uuid, style_name, s, d)
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except:
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traceback.print_exc() #TODO something like _failed_thumbs_cache
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def do_thumb(self, image_uuid, style_name, session, tmpdir):
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"""
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Generate a thumbnail for the given image identified by uuid
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"""
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# find the image
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image = session.query(Photo).filter(Photo.uuid == image_uuid).first()
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if not image:
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logging.info("attempted invalid uuid: %s", image_uuid)
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return
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# download the image
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local_src_path = os.path.join(tmpdir, image.fname) # TODO fname isn't sanitized?
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thumb_path = os.path.join(tmpdir, "thumb.jpg")
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with (
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self.library.open(image.path, "rb") as src,
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open(local_src_path, "wb") as dest,
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):
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shutil.copyfileobj(src, dest)
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# generate a still from the image
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get_video_thumb(local_src_path, thumb_path)
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# copy thumbnail to cache storage
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# TODO write thumb.jpg to thumb storage
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os.system(f"cp {thumb_path} /Users/dave/Desktop/")
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class ThumbServiceWeb(object):
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def __init__(self, queue_thumbnail):
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self.queue_thumbnail = queue_thumbnail
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@cherrypy.expose
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def index(self):
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yield "photoapp thumbnail service OK"
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@cherrypy.expose
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# @require_auth
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def thumb(self, uuid, style):
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"""
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Generate a thumbnail for the file identified. Calling this endpoint adds the image to the queue. Duplicate
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requests are OK and are ignored later
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"""
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self.queue_thumbnail((uuid, style, ))
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yield "ok"
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# TODO dedupe me
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def validate_password(realm, username, password):
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if db.query(User).filter(User.name == username, User.password == pwhash(password)).first():
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return True
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return False
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def main():
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# this is a slimmed down version of daemon.py TODO dedupe me
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import argparse
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import signal
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parser = argparse.ArgumentParser(description="Photod photo server")
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parser.add_argument('-p', '--port', help="tcp port to listen on",
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default=int(os.environ.get("THUMB_SERVICE_PORT", 8081)), type=int)
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parser.add_argument('-l', '--library', default=os.environ.get("STORAGE_URL"), help="library path")
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parser.add_argument('-c', '--cache', default=os.environ.get("CACHE_URL"), help="cache url")
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# https://docs.sqlalchemy.org/en/13/core/engines.html
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parser.add_argument('-s', '--database', help="sqlalchemy database connection uri",
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default=os.environ.get("DATABASE_URL")),
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parser.add_argument('--debug', action="store_true", help="enable development options")
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args = parser.parse_args()
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if not args.database:
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parser.error("--database or DATABASE_URL is required")
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if not args.library:
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parser.error("--library or STORAGE_URL is required")
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if not args.cache:
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parser.error("--cache or CACHE_URL is required")
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logging.basicConfig(level=logging.INFO if args.debug else logging.WARNING,
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format="%(asctime)-15s %(levelname)-8s %(filename)s:%(lineno)d %(message)s")
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# Get database connection
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engine = get_db_engine(args.database)
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setup_thumb_user(engine)
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# Setup database in web framework
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cherrypy.tools.db = SATool()
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SAEnginePlugin(cherrypy.engine, engine).subscribe()
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# Create various internal tools
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library_storage = uri_to_storage(args.library)
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library_manager = LibraryManager(library_storage)
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cache_storage = uri_to_storage(args.cache)
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thumbnail_tool = ThumbGenerator(library_manager, cache_storage)
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thumbnail_worker = ThumbWorker(engine, library_storage, cache_storage, thumbnail_tool)
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thumbnail_worker.start()
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# Setup and mount web ui
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web = ThumbServiceWeb(thumbnail_worker.queue.put)
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cherrypy.tree.mount(web, '/', {'/': {'tools.trailing_slash.on': False,
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'tools.db.on': True, }})
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# Setup and mount API
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api = PhotosApi(library_manager)
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cherrypy.tree.mount(api, '/api', {'/': {'tools.sessions.on': False,
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'tools.trailing_slash.on': False,
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'tools.auth_basic.on': True,
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'tools.auth_basic.realm': 'photolib',
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'tools.auth_basic.checkpassword': validate_password,
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'tools.db.on': True}})
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# General config options
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cherrypy.config.update({
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'tools.sessions.storage_class': DatabaseSession,
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'tools.sessions.on': True,
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'tools.sessions.locking': 'explicit',
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'tools.sessions.timeout': 525600,
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'request.show_tracebacks': True,
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'server.socket_port': args.port,
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'server.thread_pool': 5,
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'server.socket_host': '0.0.0.0',
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'server.show_tracebacks': True,
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'log.screen': False,
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'engine.autoreload.on': args.debug,
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})
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# Setup signal handling and run it.
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def signal_handler(signum, stack):
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logging.critical('Got sig {}, exiting...'.format(signum))
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cherrypy.engine.exit()
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signal.signal(signal.SIGINT, signal_handler)
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signal.signal(signal.SIGTERM, signal_handler)
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try:
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cherrypy.engine.start()
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cherrypy.engine.block()
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finally:
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logging.info("API has shut down")
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cherrypy.engine.exit()
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if __name__ == '__main__':
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main()
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@ -2,7 +2,7 @@ import os
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import argparse
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from photoapp.types import User
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from photoapp.common import pwhash
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from photoapp.dbutils import get_db_session
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from photoapp.dbutils import create_db_sessionmaker, get_db_engine
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from tabulate import tabulate
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@ -45,7 +45,7 @@ def main():
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if not args.database:
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parser.error("--database or DATABASE_URL is required")
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session = get_db_session(args.database)()
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session = create_db_sessionmaker(get_db_engine(args.database))()
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if args.action == "create":
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create_user(session, args.username, args.password)
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