def init_db():
# import all modules here that might define models so that
# they will be registered properly on the metadata. Otherwise
# you will have to import them first before calling init_db()
import userapiapp.models
Base.metadata.drop_all(bind=engine)
get_logger().info('Database dropped')
Base.metadata.create_all(bind=engine)
get_logger().info('Database created')
def init_db():
# import all modules here that might define models so that
# they will be registered properly on the metadata. Otherwise
# you will have to import them first before calling init_db()
import userapiapp.models
Base.metadata.drop_all(bind=engine)
get_logger().info('Database dropped')
Base.metadata.create_all(bind=engine)
get_logger().info('Database created')
def get_clip(stream_id):
stream = Stream.query.get(stream_id)
if stream:
if not stream.start_date:
return jsonify(error_message='Stream not started'), 500
else:
if request.method == 'POST':
start = request.form.get('start')
stop = request.form.get('stop')
else:
start = request.args.get('start')
stop = request.args.get('stop')
start = convert_to_datetime(
int(start)) if start else stream.start_date
if stop:
stop = convert_to_datetime(int(stop))
else:
if stream.stop_date != None:
stop = stream.stop_date
else:
stop = datetime.now()
clip_request = ClipRequest.query.filter(
ClipRequest.stream_id == stream_id, ClipRequest.start == start,
ClipRequest.stop == stop).first()
if not clip_request:
clip_request = ClipRequest(stream_id, start, stop)
db_session.add(clip_request)
db_session.commit()
get_logger().info(
"Clip request %d for stream %d (%s - %s) created",
clip_request.id, stream_id, start, stop)
pop_params = [
'python', 'manage.py', 'process_request', '-r',
str(clip_request.id)
]
if current_app.config['TESTING']: pop_params += ['-t', 'True']
pop = Popen(pop_params)
if not clip_request.start_processing_date:
result = {'status': 'pending'}
elif not clip_request.done_date:
result = {'status': 'processing'}
else:
clips = [{'link': link.url} for link in clip_request.links]
result = {'status': 'done', 'clips': clips}
return jsonify(**result)
else:
return jsonify(error_message='Stream not found'), 404
def get_clips_info(self, stream_id, start_stamp, stop_stamp):
if self.use_mock: storage_mock.init(self)
params = {
'stream_id': stream_id,
'start_time': start_stamp,
'stop_time': stop_stamp
}
get_logger().info("Get meta info %d %s - %s from %s",
stream_id, start_stamp, stop_stamp, self.info_url)
response = requests.get(self.info_url, params=params)
return response.json()
def compile_clip(self, stream_id, start, stop, request_id):
start_stamp = convert_from_datetime(start)
stop_stamp = convert_from_datetime(stop)
info = self.storage_proxy.get_clips_info(stream_id, start_stamp, stop_stamp)
sorted_clips = Seamstress.sort_clips(request_id, info['clips'])
get_logger().debug("%d fragments for request %d found. %d groups",
len(info['clips']), request_id, len(sorted_clips))
output_files = []
for group in sorted_clips:
output_file = Seamstress.get_output_name(stream_id,
group.start_stamp() + group.start_offset(start_stamp),
group.length(start_stamp, stop_stamp))
full_output_file = os.path.join(self.result_folder, output_file)
if not os.path.isfile(full_output_file):
group.download_fragments(self.storage_proxy, self.temp_folder)
self.join_clip(group.fragments, full_output_file,
group.start_offset(start_stamp), group.length(start_stamp, stop_stamp))
get_logger().info("Clip %s created", full_output_file)
else:
get_logger().info("Clip %s already exists", full_output_file)
output_files.append(full_output_file)
group.remove_downloaded()
get_logger().debug("All fragments for request %d removed", request_id)
return output_files
def compile_clip(self, stream_id, start, stop, request_id):
start_stamp = convert_from_datetime(start)
stop_stamp = convert_from_datetime(stop)
info = self.storage_proxy.get_clips_info(stream_id, start_stamp,
stop_stamp)
sorted_clips = Seamstress.sort_clips(request_id, info['clips'])
get_logger().debug("%d fragments for request %d found. %d groups",
len(info['clips']), request_id, len(sorted_clips))
output_files = []
for group in sorted_clips:
output_file = Seamstress.get_output_name(
stream_id,
group.start_stamp() + group.start_offset(start_stamp),
group.length(start_stamp, stop_stamp))
full_output_file = os.path.join(self.result_folder, output_file)
if not os.path.isfile(full_output_file):
group.download_fragments(self.storage_proxy, self.temp_folder)
self.join_clip(group.fragments, full_output_file,
group.start_offset(start_stamp),
group.length(start_stamp, stop_stamp))
get_logger().info("Clip %s created", full_output_file)
else:
get_logger().info("Clip %s already exists", full_output_file)
output_files.append(full_output_file)
group.remove_downloaded()
get_logger().debug("All fragments for request %d removed",
request_id)
return output_files
def get_clip(stream_id):
stream = Stream.query.get(stream_id)
if stream:
if not stream.start_date:
return jsonify(error_message='Stream not started'), 500
else:
if request.method == 'POST':
start = request.form.get('start')
stop = request.form.get('stop')
else:
start = request.args.get('start')
stop = request.args.get('stop')
start = convert_to_datetime(int(start)) if start else stream.start_date
if stop:
stop = convert_to_datetime(int(stop))
else:
if stream.stop_date != None:
stop = stream.stop_date
else:
stop = datetime.now()
clip_request = ClipRequest.query.filter(ClipRequest.stream_id==stream_id,
ClipRequest.start==start, ClipRequest.stop==stop).first()
if not clip_request:
clip_request = ClipRequest(stream_id, start, stop)
db_session.add(clip_request)
db_session.commit()
get_logger().info("Clip request %d for stream %d (%s - %s) created", clip_request.id,
stream_id, start, stop)
pop_params = ['python', 'manage.py', 'process_request', '-r', str(clip_request.id)]
if current_app.config['TESTING']: pop_params += ['-t', 'True']
pop = Popen(pop_params)
if not clip_request.start_processing_date:
result = {'status': 'pending'}
elif not clip_request.done_date:
result = {'status': 'processing'}
else:
clips = [{ 'link': link.url } for link in clip_request.links]
result = {'status': 'done', 'clips': clips}
return jsonify(**result)
else:
return jsonify(error_message='Stream not found'), 404
def start(stream_id):
stream = Stream.query.get(stream_id)
if stream:
if stream.start_date:
return jsonify(error_message='Stream already started'), 500
else:
if segmentor_proxy.start(stream.id, stream.url):
stream.start_date = datetime.now()
db_session.commit()
get_logger().info("Stream %d started", stream.id)
return jsonify(result='ok')
else:
get_logger().error("Cannot start stream %d", stream.id)
return jsonify(error_message='Cannot start stream'), 500
else:
return jsonify(error_message='Stream not found'), 404
def start(stream_id):
stream = Stream.query.get(stream_id)
if stream:
if stream.start_date:
return jsonify(error_message='Stream already started'), 500
else:
if segmentor_proxy.start(stream.id, stream.url):
stream.start_date = datetime.now()
db_session.commit()
get_logger().info("Stream %d started", stream.id)
return jsonify(result='ok')
else:
get_logger().error("Cannot start stream %d", stream.id)
return jsonify(error_message='Cannot start stream'), 500
else:
return jsonify(error_message='Stream not found'), 404
def create():
if request.json:
url = request.json.get('url')
description = request.json.get('description')
else:
url = request.form.get('url')
description = request.form.get('description')
if not url:
return jsonify(error_message='URL cannot be empty'), 500
else:
stream = Stream(url, description)
db_session.add(stream)
db_session.commit()
get_logger().info("Stream %d (url: %s , description: %s) created", stream.id, stream.url, stream.description)
return jsonify(stream_id=stream.id)
def create():
if request.json:
url = request.json.get('url')
description = request.json.get('description')
else:
url = request.form.get('url')
description = request.form.get('description')
if not url:
return jsonify(error_message='URL cannot be empty'), 500
else:
stream = Stream(url, description)
db_session.add(stream)
db_session.commit()
get_logger().info("Stream %d (url: %s , description: %s) created",
stream.id, stream.url, stream.description)
return jsonify(stream_id=stream.id)
def clear_old_requests():
"""
Clear all old requests
"""
requests_count = 0
files_count = 0
for request in ClipRequest.query.all():
for link in request.links:
if os.path.isfile(link.file_path):
os.remove(link.file_path)
files_count += 1
db_session.delete(link)
db_session.delete(request)
requests_count += 1
count = ClipRequest.query.delete()
db_session.commit()
get_logger().info("Old requests cleared. Deleted: %d requests, %d files", requests_count, files_count)
print "Deleted: {0} requests, {1} files".format(requests_count, files_count)
def process_request(request_id, test):
"""
Start to process clip request. Params: -r <request_id>
"""
if test:
print '!!! TEST REQUEST PROCESSING !!!'
current_app.config.from_object('tests.test_settings')
init_app(current_app)
print current_app.config['DATABASE_URI']
r = ClipRequest.query.get(request_id)
if r == None:
get_logger().error("Request %s not found", request_id)
else:
r.start_processing_date = datetime.now()
db_session.commit()
get_logger().info("Start to process request %s", request_id)
s = Seamstress(StorageProxy(current_app.config), current_app.config['TEMP_FOLDER'],
current_app.config['RESULT_CLIPS_FOLDER'], current_app.config['FFMPEG_BIN'])
output_files = s.compile_clip(r.stream_id, r.start, r.stop, r.id)
r.done_date = datetime.now()
for o in output_files:
link = ClipLink(os.path.join(current_app.config['DOWNLOAD_LINK_PREFIX'], o.split('/')[-1]),
os.path.join(current_app.config['RESULT_CLIPS_FOLDER'], o))
r.links.append(link)
db_session.commit()
get_logger().info("Finish to process request %s", request_id)
def get_clip(self, file_name, clip_id):
if self.use_mock: storage_mock.init(self)
clip_url = self.clip_url.format(clip_id)
get_logger().info("Download clip %d from %s", clip_id, self.clip_url)
response = requests.get(clip_url, stream=True)
with open(file_name, 'wb') as f:
file_size = int(response.headers['content-length'])
get_logger().info("Download to %s Bytes: %s", file_name, file_size)
file_size_dl = 0
for chunk in response.iter_content(chunk_size=8024):
if chunk:
file_size_dl += len(chunk)
f.write(chunk)
f.flush()
get_logger().debug("Clip %s downloaded", file_name)
def get_status(self, stream_id):
if self.use_mock: segmentor_mock.init(self)
full_url = self.status_url.format(stream_id)
try:
get_logger().info("Get status of stream %d, call [GET] %s",
stream_id, full_url)
response = requests.get(full_url)
except Exception:
get_logger().exception("Cannot call status function for stream %d",
stream_id)
return None
else:
if response.status_code == 200:
return response.json()
else:
get_logger().error(
"Error while calling status function for %d: %s",
stream_id, response.text)
return None
def stop(self, stream_id):
if self.use_mock: segmentor_mock.init(self)
full_url = self.stop_url.format(stream_id)
try:
get_logger().info("Stop record for stream %d, call [POST] %s",
stream_id, full_url)
response = requests.post(full_url)
except Exception:
get_logger().exception("Cannot call stop function for stream %d",
stream_id)
return False
else:
if response.status_code == 200:
return True
else:
get_logger().error(
"Error while calling stop function for %d: %s", stream_id,
response.text)
return False
def join_clip(self, fragments_to_join, output_file, cut_start=0, cut_length=None):
converted = []
for f in fragments_to_join:
fragment_path = f[FragmentsGroup.DOWNLOAD_PATH_FIELD]
new_filename = fragment_path + '.mpg'
get_logger().debug("Convert %s to %s", fragment_path, new_filename)
command = [self.ffmpeg,
'-i', fragment_path,
'-acodec', 'copy',
'-vcodec', 'copy',
'-f', 'mpegts',
'-vbsf', 'h264_mp4toannexb',
'-y',
new_filename]
Popen(command, bufsize=10**8).wait()
converted.append(new_filename)
all_clips = '|'.join(converted)
get_logger().debug("Concat %d fragments to %s", len(converted), output_file)
command = [self.ffmpeg,
'-i', 'concat:' + all_clips + '',
'-acodec', 'copy',
'-vcodec', 'copy',
'-ss', str(cut_start)]
if cut_length: command += ['-t', str(cut_length)]
command += ['-absf', 'aac_adtstoasc',
'-y',
output_file]
print command
Popen(command, bufsize=10**8).wait()
for f in converted:
get_logger().debug("Remove %s", f)
os.remove(f)
def join_clip(self,
fragments_to_join,
output_file,
cut_start=0,
cut_length=None):
converted = []
for f in fragments_to_join:
fragment_path = f[FragmentsGroup.DOWNLOAD_PATH_FIELD]
new_filename = fragment_path + '.mpg'
get_logger().debug("Convert %s to %s", fragment_path, new_filename)
command = [
self.ffmpeg, '-i', fragment_path, '-acodec', 'copy', '-vcodec',
'copy', '-f', 'mpegts', '-vbsf', 'h264_mp4toannexb', '-y',
new_filename
]
Popen(command, bufsize=10**8).wait()
converted.append(new_filename)
all_clips = '|'.join(converted)
get_logger().debug("Concat %d fragments to %s", len(converted),
output_file)
command = [
self.ffmpeg, '-i', 'concat:' + all_clips + '', '-acodec', 'copy',
'-vcodec', 'copy', '-ss',
str(cut_start)
]
if cut_length: command += ['-t', str(cut_length)]
command += ['-absf', 'aac_adtstoasc', '-y', output_file]
print command
Popen(command, bufsize=10**8).wait()
for f in converted:
get_logger().debug("Remove %s", f)
os.remove(f)
def hello():
get_logger().info('Hello!')
return 'Hello! I\'m UserAPI application!'
def hello():
get_logger().info('Hello!')
return 'Hello! I\'m UserAPI application!'
