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<h1 id="office-documents-preview-with-libreoffice">Office Documents Preview with LibreOffice<a class="headerlink" href="#office-documents-preview-with-libreoffice" title="Permanent link">&para;</a></h1>
<blockquote>
<p>This is a deprecated feature since version 11. Integrating with CollaboraOnline or OnlyOffice is recommended.</p>
</blockquote>
<p>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, CollaboraOnline or OnlyOffice.</p>
<h2 id="version-71x-80x">Version 7.1.x - 8.0.x<a class="headerlink" href="#version-71x-80x" title="Permanent link">&para;</a></h2>
<h3 id="install-libreofficeuno">Install Libreoffice/UNO<a class="headerlink" href="#install-libreofficeuno" title="Permanent link">&para;</a></h3>
<p>Libreoffice 6.2+ and Python-uno library are required to enable office files online preview.</p>
<p>On Ubuntu/Debian:</p>
<div class="codehilite"><pre><span></span><code>sudo<span class="w"> </span>apt-get<span class="w"> </span>install<span class="w"> </span>libreoffice<span class="w"> </span>libreoffice-script-provider-python
</code></pre></div>
<blockquote>
<p>For older version of Ubuntu: <code>sudo apt-get install libreoffice python-uno</code></p>
</blockquote>
<p>On Centos/RHEL, you need to first remove the default libreoffice in the distribution:</p>
<div class="codehilite"><pre><span></span><code>yum remove --setopt=clean_requirements_on_remove=0 libreoffice-*
</code></pre></div>
<p>Then install version 6.4 or newer (<a href="https://wiki.documentfoundation.org/Documentation/Install/Linux#Terminal-Based_Install">Installation of LibreOffice on Linux</a>).</p>
<p>Also, you may need to install fonts for your language, especially for Asians, otherwise the office document may not display correctly.</p>
<h3 id="enable-office-preview">Enable Office Preview<a class="headerlink" href="#enable-office-preview" title="Permanent link">&para;</a></h3>
<p>Open file <code>seafevents.conf</code>, in the <code>OFFICE CONVERTER</code> section:</p>
<div class="codehilite"><pre><span></span><code><span class="k">[OFFICE CONVERTER]</span>
<span class="na">enabled</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">true</span>
<span class="na">host</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">127.0.0.1</span>
<span class="na">port</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">6000</span>
</code></pre></div>
<p>After modifying and saving <code>seafevents.conf</code>, restart seafile server by <code>./seafile.sh restart</code></p>
<p>The office converter process will be started and listen on 127.0.0.1:6000</p>
<p>In <code>seahub_settings.py</code>, add the following config</p>
<div class="codehilite"><pre><span></span><code>OFFICE_CONVERTOR_ROOT = &#39;http://127.0.0.1:6000/&#39;
</code></pre></div>
<p>Open a doc/ppt/xls file on Seahub, you should be about the previewing it in your browser.</p>
<h3 id="other-configurable-options">Other Configurable Options<a class="headerlink" href="#other-configurable-options" title="Permanent link">&para;</a></h3>
<p>Here are full list of options you can fine tune:</p>
<div class="codehilite"><pre><span></span><code><span class="k">[OFFICE CONVERTER]</span>
<span class="c1">## must be &quot;true&quot; to enable office file online preview</span>
<span class="na">enabled</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">true</span>
<span class="c1">## How many libreoffice worker processes to run concurrenlty</span>
<span class="na">workers</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">1</span>
<span class="c1">## where to store the converted office/pdf files. Deafult is /tmp/.</span>
<span class="na">outputdir</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">/tmp/</span>
<span class="na">host</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">127.0.0.1</span>
<span class="na">port</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">6000</span>
</code></pre></div>
<h2 id="version-90x-or-above">Version 9.0.x or above<a class="headerlink" href="#version-90x-or-above" title="Permanent link">&para;</a></h2>
<p>We use Docker to deploy LibreOffice as an example, so you need to install Docker 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.</p>
<h3 id="prepare-docker-composeyml">Prepare <code>docker-compose.yml</code><a class="headerlink" href="#prepare-docker-composeyml" title="Permanent link">&para;</a></h3>
<p>Download and change <a href="../office-preview-yml/docker-compose.yml">docker-compose.yml</a>.</p>
<div class="codehilite"><pre><span></span><code><span class="n">services</span><span class="o">:</span>
<span class="w"> </span><span class="n">office</span><span class="o">-</span><span class="n">preview</span><span class="o">:</span>
<span class="w"> </span><span class="n">image</span><span class="o">:</span><span class="w"> </span><span class="n">seafileltd</span><span class="o">/</span><span class="n">office</span><span class="o">-</span><span class="n">preview</span><span class="o">:</span><span class="n">latest</span>
<span class="w"> </span><span class="n">container_name</span><span class="o">:</span><span class="w"> </span><span class="n">seafile</span><span class="o">-</span><span class="n">office</span><span class="o">-</span><span class="n">preview</span>
<span class="w"> </span><span class="n">environment</span><span class="o">:</span>
<span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="n">IGNORE_JWT_CHECK</span><span class="o">=</span><span class="kc">true</span><span class="w"> </span><span class="err">#</span><span class="w"> </span><span class="n">Usually</span><span class="o">,</span><span class="w"> </span><span class="n">seafile</span><span class="w"> </span><span class="n">and</span><span class="w"> </span><span class="n">office</span><span class="o">-</span><span class="n">perview</span><span class="w"> </span><span class="n">are</span><span class="w"> </span><span class="n">deployed</span><span class="w"> </span><span class="n">on</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">same</span><span class="w"> </span><span class="n">machine</span><span class="w"> </span><span class="n">and</span><span class="w"> </span><span class="n">communicate</span><span class="w"> </span><span class="n">through</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">intranet</span><span class="o">,</span><span class="w"> </span><span class="n">so</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">jwt</span><span class="w"> </span><span class="n">check</span><span class="w"> </span><span class="n">can</span><span class="w"> </span><span class="n">be</span><span class="w"> </span><span class="n">ignored</span><span class="o">.</span>
<span class="w"> </span><span class="n">ports</span><span class="o">:</span>
<span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="s2">&quot;192.x.x.x:8089:8089&quot;</span><span class="w"> </span><span class="err">#</span><span class="w"> </span><span class="mi">192</span><span class="o">.</span><span class="na">x</span><span class="o">.</span><span class="na">x</span><span class="o">.</span><span class="na">x</span><span class="w"> </span><span class="k">is</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">IP</span><span class="w"> </span><span class="n">address</span><span class="w"> </span><span class="n">of</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">machine</span>
<span class="w"> </span><span class="n">command</span><span class="o">:</span><span class="w"> </span><span class="n">bash</span><span class="w"> </span><span class="n">start</span><span class="o">.</span><span class="na">sh</span>
<span class="w"> </span><span class="n">volumes</span><span class="o">:</span>
<span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="sr">/opt/office-preview/shared:/s</span><span class="n">hared</span><span class="w"> </span><span class="err">#</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="n">host</span><span class="w"> </span><span class="n">path</span><span class="w"> </span><span class="n">can</span><span class="w"> </span><span class="n">be</span><span class="w"> </span><span class="n">customized</span>
</code></pre></div>
<h3 id="start-seafile-office-preview-container">Start <code>seafile-office-preview</code> container<a class="headerlink" href="#start-seafile-office-preview-container" title="Permanent link">&para;</a></h3>
<div class="codehilite"><pre><span></span><code>docker compose up -d
</code></pre></div>
<p>Add <code>/opt/office-preview/shared/office_convertor_settings.py</code> manually.</p>
<div class="codehilite"><pre><span></span><code><span class="gh">#</span> Make sure the SECRET_KEY is the same as value in seahub_settings.py
SECRET_KEY = &quot;o@^yktib39k+oor2_busbcxqaach_$b5zq-)4l6l39v#8ky5ta&quot;
WORKERS = 10 # worker number
OUTPUT_DIR = &#39;/shared/output&#39; # output folder in container
PORT = 8089 # port in container
</code></pre></div>
<p>Restart <code>seafile-office-preview</code> container.</p>
<div class="codehilite"><pre><span></span><code>docker restart seafile-office-preview
</code></pre></div>
<h3 id="config-seahub_settingspy">Config seahub_settings.py<a class="headerlink" href="#config-seahub_settingspy" title="Permanent link">&para;</a></h3>
<p>Add the following configuration to <code>seahub_settings.py</code>.</p>
<div class="codehilite"><pre><span></span><code><span class="nx">OFFICE_CONVERTOR_ROOT</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="err">&#39;</span><span class="nx">http</span><span class="p">:</span><span class="c1">//192.x.x.x:8089&#39; # 192.x.x.x is the IP address of the machine</span>
</code></pre></div>
<p>Restart seahub.</p>
<div class="codehilite"><pre><span></span><code>./seahub.sh restart
</code></pre></div>
<h2 id="faq-about-office-document-preview">FAQ about Office document preview<a class="headerlink" href="#faq-about-office-document-preview" title="Permanent link">&para;</a></h2>
<h4 id="document-preview-doesnt-work-where-to-find-more-information">Document preview doesn't work, where to find more information?<a class="headerlink" href="#document-preview-doesnt-work-where-to-find-more-information" title="Permanent link">&para;</a></h4>
<p>You can check the log at logs/seafevents.log</p>
<h4 id="my-server-is-centos-and-i-see-errors-like-usrlib64libreofficeprogramsofficebin-x11-error-cant-open-display-how-could-i-fix-it">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?<a class="headerlink" href="#my-server-is-centos-and-i-see-errors-like-usrlib64libreofficeprogramsofficebin-x11-error-cant-open-display-how-could-i-fix-it" title="Permanent link">&para;</a></h4>
<p>This error indicates you have not installed the <code>libreoffice-headless</code> package. Install it by <code>"sudo yum install libreoffice-headless"</code>.</p>
<h4 id="document-preview-doesnt-work-on-my-ubuntudebian-server-what-can-i-do">Document preview doesn't work on my Ubuntu/Debian server, what can I do?<a class="headerlink" href="#document-preview-doesnt-work-on-my-ubuntudebian-server-what-can-i-do" title="Permanent link">&para;</a></h4>
<p>Current office online preview works with libreoffice 4.0-4.2. If the version of libreoffice installed by <code>apt-get</code> is too old or too new, you can solve this by:</p>
<p>Remove the installed libreoffice:</p>
<div class="codehilite"><pre><span></span><code>sudo apt-get remove libreoffice* python-uno python3-uno
</code></pre></div>
<p>Download libreoffice packages from <a href="https://downloadarchive.documentfoundation.org/libreoffice/old/">libreoffice official site</a></p>
<p>Install the downloaded pacakges:</p>
<div class="codehilite"><pre><span></span><code>tar xf LibreOffice_4.1.6_Linux_x86-64_deb.tar.gz
cd LibreOffice_4.1.6.2_Linux_x86-64_deb
cd DEBS
sudo dpkg -i *.deb
</code></pre></div>
<p>Restart your seafile server and try again. It should work now.</p>
<div class="codehilite"><pre><span></span><code>./seafile.sh restart
</code></pre></div>
<h4 id="the-browser-displays-document-conversion-failed-and-in-the-logs-i-see-messages-like-warning-failed-to-convert-xxx-to-what-should-i-do">The browser displays "document conversion failed", and in the logs I see messages like <code>[WARNING] failed to convert xxx to ...</code>, what should I do?<a class="headerlink" href="#the-browser-displays-document-conversion-failed-and-in-the-logs-i-see-messages-like-warning-failed-to-convert-xxx-to-what-should-i-do" title="Permanent link">&para;</a></h4>
<p>Sometimes the libreoffice process need to be restarted, especially if it's the first time seafile server is running on the server.</p>
<p>Try to kill the libreoffice process with <code>pkill -f soffice.bin</code>. 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.</p>
<h4 id="the-above-solution-does-not-solve-my-problem">The above solution does not solve my problem.<a class="headerlink" href="#the-above-solution-does-not-solve-my-problem" title="Permanent link">&para;</a></h4>
<p>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.</p>
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