Office Documents Preview with LibreOffice¶
Seafile Professional Server supports previewing office documents online by converting them to PDF. You can follow these steps to use the feature. If you'd like to edit office files online, you can integrate Seafile with Microsoft Office Online server, LibreOffice online or OnlyOffice.
Version 7.1.x - 8.0.x¶
Libreoffice 6.2+ and Python-uno library are required to enable office files online preview.
sudo apt-get install libreoffice libreoffice-script-provider-python
For older version of Ubuntu:
sudo apt-get install libreoffice python-uno
On Centos/RHEL, you need to first remove the default libreoffice in the distribution:
yum remove --setopt=clean_requirements_on_remove=0 libreoffice-*
Then install version 6.4 or newer (Installation of LibreOffice on Linux).
Also, you may need to install fonts for your language, especially for Asians, otherwise the office document may not display correctly.
Enable Office Preview¶
seafevents.conf, in the
OFFICE CONVERTER section:
[OFFICE CONVERTER] enabled = true host = 127.0.0.1 port = 6000
After modifying and saving
seafevents.conf, restart seafile server by
The office converter process will be started and listen on 127.0.0.1:6000
seahub_settings.py, add the following config
OFFICE_CONVERTOR_ROOT = 'http://127.0.0.1:6000/'
Open a doc/ppt/xls file on Seahub, you should be about the previewing it in your browser.
Other Configurable Options¶
Here are full list of options you can fine tune:
[OFFICE CONVERTER] ## must be "true" to enable office file online preview enabled = true ## How many libreoffice worker processes to run concurrenlty workers = 1 ## where to store the converted office/pdf files. Deafult is /tmp/. outputdir = /tmp/ host = 127.0.0.1 port = 6000
Version 9.0.x or above¶
We use Docker to deploy LibreOffice as an example, so you need to install Docker and docker-compose on the server in advance (Docker installation is not introduced here). The office-preview service needs to be deployed on the same machine as the Seafile service.
Download and change docker-compose.yml.
version: '3.0' services: office-preview: image: seafileltd/office-preview:latest container_name: seafile-office-preview environment: - IGNORE_JWT_CHECK=true # Usually, seafile and office-perview are deployed on the same machine and communicate through the intranet, so the jwt check can be ignored. ports: - "192.x.x.x:8089:8089" # 192.x.x.x is the IP address of the machine command: bash start.sh volumes: - /opt/office-preview/shared:/shared # the host path can be customized
docker-compose up -d
# Make sure the SECRET_KEY is the same as value in seahub_settings.py SECRET_KEY = "o@^yktib39k+oor2_busbcxqaach_$b5zq-)4l6l39v#8ky5ta" WORKERS = 10 # worker number OUTPUT_DIR = '/shared/output' # output folder in container PORT = 8089 # port in container
docker restart seafile-office-preview
Add the following configuration to
OFFICE_CONVERTOR_ROOT = 'http://192.x.x.x:8089' # 192.x.x.x is the IP address of the machine
FAQ about Office document preview¶
Document preview doesn't work, where to find more information?¶
You can check the log at logs/seafevents.log
My server is CentOS, and I see errors like "/usr/lib64/libreoffice/program/soffice.bin X11 error: Can't open display", how could I fix it?¶
This error indicates you have not installed the
libreoffice-headless package. Install it by
"sudo yum install libreoffice-headless".
Document preview doesn't work on my Ubuntu/Debian server, what can I do?¶
Current office online preview works with libreoffice 4.0-4.2. If the version of libreoffice installed by
apt-get is too old or too new, you can solve this by:
Remove the installed libreoffice:
sudo apt-get remove libreoffice* python-uno python3-uno
Download libreoffice packages from libreoffice official site
Install the downloaded pacakges:
tar xf LibreOffice_4.1.6_Linux_x86-64_deb.tar.gz cd LibreOffice_126.96.36.199_Linux_x86-64_deb cd DEBS sudo dpkg -i *.deb
Restart your seafile server and try again. It should work now.
The browser displays "document conversion failed", and in the logs I see messages like
[WARNING] failed to convert xxx to ..., what should I do?¶
Sometimes the libreoffice process need to be restarted, especially if it's the first time seafile server is running on the server.
Try to kill the libreoffice process with
pkill -f soffice.bin. Then try re-opening the preview page in the brower again. If you are deploying seafile in cluster mode, make sure memcached is working on each server.
The above solution does not solve my problem.¶
Please check whether the user you run Seafile can correctly start the libreoffice process. There may be permission problems. For example, if you use www-data user to run Seafile, make sure www-data has a home directory and can write to the home directory.