thumb.py

from django.conf import settings
from libthumbor import CryptoURL

def thumb(url, **kwargs):
    '''
        returns a thumbor url for 'url' with **kwargs as thumbor options.

        Positional arguments:
        url -- the location of the original image

        Keyword arguments:
        For the complete list of thumbor options
        https://github.com/globocom/thumbor/wiki/Usage
        and the actual implementation for the url generation
        https://github.com/heynemann/libthumbor/blob/master/libthumbor/url.py
    '''
    if settings.THUMBOR_BASE_URL:
        # If THUMBOR_BASE_URL is explicity set, use that
        base = settings.THUMBOR_BASE_URL
    else:
        # otherwise assume that thumbor is setup behind the same
        # CDN behind the `thumbor` namespace.
        scheme, netloc = urlparse.urlsplit(url)[:2]
        base = '{}://{}/thumbor'.format(scheme, netloc)
    crypto = CryptoURL(key=settings.THUMBOR_KEY)
    
    # just for code clarity
    thumbor_kwargs = kwargs
    if not 'fit_in' in thumbor_kwargs:
        thumbor_kwargs['fit_in'] = True

    thumbor_kwargs['image_url'] = url
    path = crypto.generate(**thumbor_kwargs)
    return u'{}{}'.format(base, path)

thumbor.nginx.conf

upstream thumbor {
    server 127.0.0.1:9000;
    server 127.0.0.1:9001;
    server 127.0.0.1:9002;
    server 127.0.0.1:9003;
}

server {
    listen 8000;
    server_name thumbor.yipit.com;
    # merge_slashes needs to be off if the image src comes in with a protocol
    merge_slashes off;
    location ^~ /thumbor/ {
        rewrite /thumbor(/.*) $1 break;
        proxy_pass http://thumbor;
    }

    location / {
        proxy_pass http://thumbor;
    }


}

thumbor.supervisor.conf

[program:thumbor]
command=/var/www/thumbor-env/bin/python /var/www/thumbor-env/bin/thumbor --port=900%(process_num)s --conf=/var/www/thumbor-env/thumbor/thumbor.conf
process_name=thumbor900%(process_num)s
numprocs=4
user=ubuntu
autostart=true
autorestart=true
stdout_logfile=/var/log/supervisor/thumbor900%(process_num)s.stdout.log
stdout_logfile_backups=3
stderr_logfile=/var/log/supervisor/thumbor900%(process_num)s.stderr.log
stderr_logfile_backups=3