lcrilly/sinbin.conf

## sinbin.conf
limit_req_zone $remote_addr zone=per_ip:1M rate=5r/s sync; # Cluster-aware rate limiting
limit_req_status 429;

keyval_zone zone=sinbin:1M timeout=60 sync;
keyval $remote_addr $sinbin_rate zone=sinbin;

# Frontend
#
server {
    listen 80;
    location / {
        set $limit_rate $sinbin_rate;
        limit_req zone=per_ip burst=1;
        error_page 429 = @send_to_sinbin;

        proxy_set_header sinbin $limit_rate;
        proxy_pass http://local_backend;
    }

    location @send_to_sinbin {
        # Make this look like a successful request, proxy to the backend as normal
        # but use mirror to make an async call to add to sinbin.
        #
        mirror /_api_call;
        proxy_set_header sinbin send_to_sinbin;
        proxy_pass http://local_backend;
    }

    location /_api_call {
        internal;
        if ($sinbin_rate) {
            return 204; # Don't attempt second POST (it will 409)
        }
        rewrite ^ /api/3/http/keyvals/sinbin break;
	proxy_method POST;
        proxy_set_body '{"$remote_addr":50}'; # Value is bandwidth limit (limit_rate)
        proxy_pass http://local_api; # Proxy to upstream so that we can control connections to API
    }
    location = /favicon.ico { return 204; }
    location /api/ { api write=on; }
}

server {
    listen 8081;
    location /api/ {
        allow 127.0.0.1;
        deny all;
        api write=on;
    }
}

server {
    listen 10001;
    location / {
        add_header Content-Type text/html;
        return 200 '<html>
               <head>
                 <meta http-equiv="refresh" content="2" />
                 <meta http-equiv="cache-control" content="no-cache" />
                 <meta http-equiv="expires" content="0" />
                 <title>Backend server</title>
               </head>
                 <body bgcolor=#$request_id>
                 <h2>Backend server</h2>
                 <h3>Sin bin status $http_sinbin</h3>
                 <hr size=1><tt>$time_local</tt>
               </body>
               </html>\n';

        #return 200 'This is the local backend\n\nSin Bin status: $http_sinbin\n';
    }
}

upstream local_backend {
    zone local_backend 64k;
    server 127.0.0.1:10001;
}

upstream local_api {
    zone send_to_sinbin 64k;
    server 127.0.0.1:8081 max_conns=1;
    queue 10 timeout=30;
}

# vim: syntax=nginx
	limit_req_zone $remote_addr zone=per_ip:1M rate=5r/s sync; # Cluster-aware rate limiting
	limit_req_status 429;

	keyval_zone zone=sinbin:1M timeout=60 sync;
	keyval $remote_addr $sinbin_rate zone=sinbin;

	# Frontend
	#
	server {
	listen 80;
	location / {
	set $limit_rate $sinbin_rate;
	limit_req zone=per_ip burst=1;
	error_page 429 = @send_to_sinbin;

	proxy_set_header sinbin $limit_rate;
	proxy_pass http://local_backend;
	}

	location @send_to_sinbin {
	# Make this look like a successful request, proxy to the backend as normal
	# but use mirror to make an async call to add to sinbin.
	#
	mirror /_api_call;
	proxy_set_header sinbin send_to_sinbin;
	proxy_pass http://local_backend;
	}

	location /_api_call {
	internal;
	if ($sinbin_rate) {
	return 204; # Don't attempt second POST (it will 409)
	}
	rewrite ^ /api/3/http/keyvals/sinbin break;
	proxy_method POST;
	proxy_set_body '{"$remote_addr":50}'; # Value is bandwidth limit (limit_rate)
	proxy_pass http://local_api; # Proxy to upstream so that we can control connections to API
	}
	location = /favicon.ico { return 204; }
	location /api/ { api write=on; }
	}

	server {
	listen 8081;
	location /api/ {
	allow 127.0.0.1;
	deny all;
	api write=on;
	}
	}

	server {
	listen 10001;
	location / {
	add_header Content-Type text/html;
	return 200 '<html>
	<head>
	<meta http-equiv="refresh" content="2" />
	<meta http-equiv="cache-control" content="no-cache" />
	<meta http-equiv="expires" content="0" />
	<title>Backend server</title>
	</head>
	<body bgcolor=#$request_id>
	<h2>Backend server</h2>
	<h3>Sin bin status $http_sinbin</h3>
	<hr size=1><tt>$time_local</tt>
	</body>
	</html>\n';

	#return 200 'This is the local backend\n\nSin Bin status: $http_sinbin\n';
	}
	}

	upstream local_backend {
	zone local_backend 64k;
	server 127.0.0.1:10001;
	}

	upstream local_api {
	zone send_to_sinbin 64k;
	server 127.0.0.1:8081 max_conns=1;
	queue 10 timeout=30;
	}

	# vim: syntax=nginx