问题是这样的:我有两个容器:Django和celery。用户上传一个word文档,celery worker将该word文档转换为pdf并上传到s3存储桶中。我使用
libreoffice --headless
进行转换。因此,用户将文件发送到API端点,并将word文档保存在名为original
的文件夹中,然后celery调用convert_office_to_pdf.delay
来转换文件并将其放入另一个名为converted
的文件夹中。除了celery函数之外,一切都按预期工作。以下是代码的样子:import subprocess
def convert_office_to_pdf(original_file):
ws = websocket.WebSocket()
ws.connect('ws://web:8000/ws/converter/public/')
#how the command will look like
print('libreoffice --headless --convert-to pdf original/{} --outdir ./converted'.format(original_file))
subprocess.call('libreoffice --headless --convert-to pdf original/{} --outdir ./converted'.format(original_file), shell=True)
ws.send(json.dumps({
'message': '{}.pdf'.format(pure_file_name),
'progress': 75}))
upload_file_to_s3(pure_file_name, 'pdf', ws)
然而,该函数已被执行,但没有任何反应。这是来自
docker-compose
的输出。web_1 | [2018/03/22 22:57:52] HTTP GET /converter/ 200 [0.06, 172.17.0.1:32788]
web_1 | [2018/03/22 22:57:52] HTTP GET /static/css/normalize.css 304 [0.02, 172.17.0.1:32788]
web_1 | [2018/03/22 22:57:52] WebSocket HANDSHAKING /ws/converter/public/ [172.17.0.1:32798]
web_1 | [2018/03/22 22:57:52] WebSocket CONNECT /ws/converter/public/ [172.17.0.1:32798]
fileshiffty_data_1 exited with code 0
worker_1 | [2018-03-22 22:58:04,413: INFO/MainProcess] Received task: api.tasks.convert_office_to_pdf[287805aa-3c9c-4212-92d4-cac5872076f2]
worker_1 | [2018-03-22 22:58:04,414: DEBUG/MainProcess] TaskPool: Apply <function _fast_trace_task at 0x7fb72d567e18> (args:('api.tasks.convert_office_to_pdf', '287805aa-3c9c-4212-92d4-cac5872076f2', {'lang': 'py', 'task': 'api.tasks.convert_office_to_pdf', 'id': '287805aa-3c9c-4212-92d4-cac5872076f2', 'eta': None, 'expires': None, 'group': None, 'retries': 0, 'timelimit': [None, None], 'root_id': '287805aa-3c9c-4212-92d4-cac5872076f2', 'parent_id': None, 'argsrepr': "('1521759484.3458297-Doc1.docx',)", 'kwargsrepr': '{}', 'origin': 'gen8@a478d8966021', 'reply_to': 'adf32365-ef93-327e-842f-7eff10fda37a', 'correlation_id': '287805aa-3c9c-4212-92d4-cac5872076f2', 'delivery_info': {'exchange': '', 'routing_key': 'celery', 'priority': 0, 'redelivered': None}}, b'[["1521759484.3458297-Doc1.docx"], {}, {"callbacks": null, "errbacks": null, "chain": null, "chord": null}]', 'application/json', 'utf-8') kwargs:{})
web_1 | [2018/03/22 22:58:04] HTTP PUT /api/v1/fileupload/word/pdf/ 200 [0.07, 172.17.0.1:32788]
worker_1 | [2018-03-22 22:58:04,417: DEBUG/MainProcess] Task accepted: api.tasks.convert_office_to_pdf[287805aa-3c9c-4212-92d4-cac5872076f2] pid:9
web_1 | [2018/03/22 22:58:04] WebSocket HANDSHAKING /ws/converter/public/ [172.17.0.2:58928]
web_1 | [2018/03/22 22:58:04] WebSocket CONNECT /ws/converter/public/ [172.17.0.2:58928]
worker_1 | [2018-03-22 22:58:04,426: WARNING/ForkPoolWorker-2] /data/web/fileshiffty
worker_1 | [2018-03-22 22:58:04,427: WARNING/ForkPoolWorker-2] libreoffice --headless --convert-to pdf original/1521759484.3458297-Doc1.docx --outdir ./converted
web_1 | {"message": "1521759484.3458297-Doc1.pdf", "progress": 50}
web_1 | {"message": "1521759484.3458297-Doc1.pdf", "progress": 75}
当我上传文件时,可以确认该文件已添加到original
文件夹,并且日志条目worker_1 | [2018-03-22 22:58:04,427:WARNING/ForkPoolWorker-2] libreoffice --headless --convert-to pdf original/1521759484.3458297-Doc1.docx --outdir ./converted
显示了subprocess
将调用的命令。然而,当我查看converted
文件夹时,我发现里面什么都没有。它完全是空的。然而,奇怪的是,当我进入docker容器并运行完全相同的东西时,文件被转换并放入文件夹中。就像这样。
root@4b9da6f71226:/data/web/fileshiffty/api# python3
Python 3.6.4 (default, Mar 14 2018, 17:49:05)
[GCC 4.9.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import subprocess
>>> subprocess.call('libreoffice --headless --convert-to pdf original/1521759484.3458297-Doc1.docx --outdir ./converted', shell=True)
convert /data/web/fileshiffty/api/original/1521759484.3458297-Doc1.docx -> /data/web/fileshiffty/api/converted/1521759484.3458297-Doc1.pdf using writer_pdf_Export
0
为什么我在命令行中执行子进程时可以正常工作,但从文件中执行却不行。请有人帮帮我吗?
编辑说明:似乎subprocess命令根本没有被执行。我将代码更改如下,以查找subprocess命令之后会发生什么,并且使用了绝对路径:
def convert_office_to_pdf(original_file):
ws = websocket.WebSocket()
ws.connect('ws://web:8000/ws/converter/public/')
pure_file_name = os.path.splitext(os.path.basename(original_file))[0]
ws.send(json.dumps({
'message': '{}.pdf'.format(pure_file_name),
'progress': 50}))
print(os.getcwd())
print('libreoffice --headless --convert-to pdf original/{} --outdir ./converted'.format(original_file))
command = ['libreoffice', '--headless', '--convert-to', 'pdf', '{}/original/{}'.format(os.getcwd(), original_file), '--outdir', '{}/converted'.format(os.getcwd())]
process = subprocess.Popen(command, stdout=subprocess.PIPE)
out, err = process.communicate()
print(out)
print(err)
print('------------------------------------------------')
ws.send(json.dumps({
'message': '{}.pdf'.format(pure_file_name),
'progress': 75}))
upload_file_to_s3(pure_file_name, 'pdf', ws)
然后我得到了以下输出结果
[2018-03-22 23:44:54,668: DEBUG/MainProcess] Task accepted: api.tasks.convert_office_to_pdf[721ed2db-6a74-4fd2-9484-0fca14df7c01] pid:9
web_1 | [2018/03/22 23:44:54] WebSocket HANDSHAKING /ws/converter/public/ [172.17.0.2:60898]
web_1 | [2018/03/22 23:44:54] WebSocket CONNECT /ws/converter/public/ [172.17.0.2:60898]
worker_1 | [2018-03-22 23:44:54,696: WARNING/ForkPoolWorker-2] /data/web/fileshiffty
worker_1 | [2018-03-22 23:44:54,696: WARNING/ForkPoolWorker-2] libreoffice --headless --convert-to pdf original/1521762293.8511283-Doc1.docx --outdir ./converted
web_1 | {"message": "1521762293.8511283-Doc1.pdf", "progress": 50}
worker_1 | [2018-03-22 23:44:55,283: WARNING/ForkPoolWorker-2] b''
worker_1 | [2018-03-22 23:44:55,283: WARNING/ForkPoolWorker-2] None
worker_1 | [2018-03-22 23:44:55,283: WARNING/ForkPoolWorker-2] ------------------------------------------------
web_1 | {"message": "1521762293.8511283-Doc1.pdf", "progress": 75}
print(out)
只会打印一个空字节,而 print(err)
则只会打印 None。
编辑 2 - 这是 docker-compose 文件。
web:
restart: always
tty: true
build: ./web/
working_dir: /data/web/fileshiffty
expose:
- "8000"
ports:
- "8000:8000"
links:
- postgres:postgres
- redis:redis
env_file: env
volumes:
- ./web:/data/web
command: bash -c "python3 manage.py runserver 0.0.0.0:8000"
# command: /usr/bin/gunicorn fileshiffty.wsgi:application -w 2 -b :8000
nginx:
restart: always
build: ./nginx/
ports:
- "80:80"
volumes_from:
- web
links:
- web:web
postgres:
restart: always
image: postgres:latest
volumes_from:
- data
volumes:
- ./postgres/docker-entrypoint-initdb.d:/docker-entrypoint-initdb.d
- ./backups/postgresql:/backup
env_file:
- env
expose:
- "5432"
redis:
restart: always
image: redis:latest
expose:
- "6379"
worker:
build: ./web/
working_dir: /data/web/fileshiffty
command: bash -c "celery -A fileshiffty worker --loglevel=DEBUG"
volumes:
- ./web:/data/web
links:
- postgres:postgres
- redis:redis
- web:web
data:
restart: always
image: alpine
volumes:
- /var/lib/postgresql
command: "true"