Show "Jatos local" after configuration of Apache as a proxy

scfeng

Hi there,

I've deployed Jatos on an AWS server, with Apache2 as the reverse proxy and SSL encryption. Since it is actually a local installation (because the binding port is localhost:8080), the GUI for my https:/[our domain name]/jatos show "Jatos local" on top, as it is shown here (https://www.jatos.org/Deploy-to-a-server-installation.html ), which mentions that "A local JATOS installation has a black bar on top. A server installation has a light-grey bar."

When I generate links for a study, they are all like this

https://localhost:8080/publix/GI2kz1qlkio

If I replace localhost:8080 with [our domain name], I can open the correct study webpage, but I need to replace "localhost:8080" for all links generated if I want to send them to participants.

Since I use reverse proxy, I think it is supposed to be set as local. But is there a way to make it like a real server installation?

I'm using an AWS EC2 Debian 11 instance;

In the production.conf, the IP and port are set as:

play.server.http.address = "0.0.0.0"
play.server.http.port = 8080

After I start jatos, it shows

admin@myserver:~/jatos_linux_java$ JATOS uses local Java
Starting JATOS... started
To use JATOS type 127.0.0.1:8080 in your browser's address bar

In the /etc/apache2/sites-available/mysite.com.conf, I have:

Let me know if you know how to solve the problem or you need more info!

Thank you very much!😀

Sheng

kri

Hi Sheng,

I just tried it with JATOS version 3.7.4 on my machine and it worked. I can't see any obvious problems in your config.

My config is:

$ /usr/sbin/apache2 -v
Server version: Apache/2.4.52 (Ubuntu)
Server built:  2022-06-14T12:30:21

and

$ cat /etc/apache2/apache2.conf

<VirtualHost *:80>
  ServerName www.example.com
 
  # Redirect all unencrypted traffic to the respective HTTPS page
  Redirect "/" "https://www.example.com/"
</VirtualHost>

<VirtualHost *:443>
  ServerName www.example.com

  # Restrict access to JATOS GUI to local network
  #<Location "/jatos">
  #  Order deny,allow
  #  Deny from all
  #  Allow from 127.0.0.1 ::1
  #  Allow from localhost
  #  Allow from 192.168
  #</Location>

  # Needed for JATOS to get the correct host and protocol
  ProxyPreserveHost On
  RequestHeader set X-Forwarded-Proto "https"
  RequestHeader set X-Forwarded-Ssl "on"
 
  # Your certificate for encryption
  SSLEngine On
  SSLCertificateFile /etc/ssl/certs/apache-selfsigned.crt
  SSLCertificateKeyFile /etc/ssl/private/apache-selfsigned.key

  # JATOS uses WebSockets for its batch and group channels
  RewriteEngine On
  RewriteCond %{HTTP:Upgrade} =websocket [NC]
  RewriteRule /(.*)           ws://localhost:9000/$1 [P,L]
  RewriteCond %{HTTP:Upgrade} !=websocket [NC]
  RewriteRule /(.*)           http://localhost:9000/$1 [P,L]

  # Proxy everything to the JATOS running on localhost on port 9000
  ProxyPass / http://localhost:9000/
  ProxyPassReverse / http://localhost:9000/
</VirtualHost>

And I didn't change anything in JATOS' production.conf. So JATOS port is the default 9000.

Hope this helps.

Best,

Kristian

`

scfeng

Thank you Kristian!

Maybe I can try on another AWS instance.

scfeng

It is working now! It shows yellow icon on the top bar!

Although I'm not 100% sure, I can share what I did for your reference.

Some files were generated during my configuration of Apache in the directory /etc/apache2/sites-avaibable and /etc/apache2/sites-enabled, which include "mysite.com-le-ssl.conf". I removed that file in both directories and redo the

sudo a2ensite mysite.com.conf

Maybe this is the solution.