Install ownCloud in a subdirectory using nginx

owncloud.conf

upstream php-handler {
    server 127.0.0.1:9000;
    #server unix:/var/run/php5-fpm.sock;
}
 
server {
    listen 80;
    server_name example.com;
    return 301 https://$server_name$request_uri;
}
 
server {
    listen 443 ssl;
    server_name example.com;
 
    ssl_certificate /etc/ssl/nginx/cert.pem;
    ssl_certificate_key /etc/ssl/nginx/cert.key;
 
    root /var/www;
 
    client_max_body_size 1000M; # set max upload size
    fastcgi_buffers 64 4K;        
 
    # ownCloud blacklist
    location ~ ^/owncloud/(?:\.htaccess|data|config|db_structure\.xml|README) {
        deny all;
        error_page 403 = /owncloud/core/templates/403.php;
    }
    
    location / {
        index index.html;
    }
 
    location /owncloud/ {           
        error_page 403 = /owncloud/core/templates/403.php;
        error_page 404 = /owncloud/core/templates/404.php;
 
        rewrite ^/owncloud/caldav(.*)$ /remote.php/caldav$1 redirect;
        rewrite ^/owncloud/carddav(.*)$ /remote.php/carddav$1 redirect;
        rewrite ^/owncloud/webdav(.*)$ /remote.php/webdav$1 redirect;
 
        rewrite ^(/owncloud/core/doc[^\/]+/)$ $1/index.html;
 
        # The following rules are only needed with webfinger
        rewrite ^/owncloud/.well-known/host-meta /public.php?service=host-meta last;
        rewrite ^/owncloud/.well-known/host-meta.json /public.php?service=host-meta-json last;
        rewrite ^/owncloud/.well-known/carddav /remote.php/carddav/ redirect;
        rewrite ^/owncloud/.well-known/caldav /remote.php/caldav/ redirect;
 
        try_files $uri $uri/ index.php;
    }
 
    location ~ \.php(?:$|/) {
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
        fastcgi_param HTTPS on;
        fastcgi_pass php-handler;
    }
 
    # Optional: set long EXPIRES header on static assets
    location ~* ^/owncloud(/.+\.(jpg|jpeg|gif|bmp|ico|png|css|js|swf))$ {
        expires 30d;
        access_log off;  # Optional: Don't log access to assets
    }
}