brwsr

Lightweight Linked Data Browser

Features

• Browse all resources starting with a designated URI prefix in a SPARQL endpoint
• Implements content negotiation to serve representations of these resources both as HTML, and as RDF/XML, Turtle and JSON-LD
• HTML page asynchronously calls http://preflabel.org service to retrieve preferred labels for all resources.

In short, it is a very lightweight Python-based alternative to Pubby (with a slightly more attractive interface design)

To install:

• Setup a virtualenv and activate it
• run pip install -r requirements.txt

To use:

• Rename config-template.py to config.py
• Make the appropriate settings in the file (documentation is inline)
• Start it with python run.py if you're playing around, otherwise
• Adjust the gunicorn_config.py for your system, and start brwsr with gunicorn -c gunicorn_config.py app:app to run in daemon mode on port 5000 (behind e.g. an Apache or Nginx proxy)

Example Nginx configuration for use with Gunicorn:

server {
    listen 80;
    server_name your.server.name.here;
    access_log /var/log/nginx/brwsr_access.log;
    error_log /var/log/nginx/brswr_error.log;


    location /socket.io {
        proxy_pass http://127.0.0.1:5000/socket.io;
        proxy_redirect off;
        proxy_buffering off;

        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "Upgrade";
    }

    location / {
        add_header Access-Control-Allow-Origin *;

        proxy_pass http://127.0.0.1:5000;
        proxy_redirect off;

        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

Running brwsr at a relative location other than '/'

If for some reason you want or need to run brwsr at a relative path other than '/', you should do two things:

1. Set the BEHIND_PROXY parameter in your config.py to True
2. Setup a Nginx proxy along the lines of the below example (adapted from http://flask.pocoo.org/snippets/35/):

location /myprefix {
  proxy_pass http://localhost:5000;
  proxy_set_header Host $host;
  proxy_set_header Upgrade $http_upgrade;
  proxy_set_header Connection "upgrade";
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  proxy_set_header X-Scheme $scheme;
  proxy_set_header X-Script-Name /myprefix;
}

Where myprefix should be set to the location you want to be running brwsr under

The proxy_pass setting should point to the address and port you are running brwsr at (default is localhost port 5000).

Acknowledgements

This work was funded by the Dutch national programme COMMIT/