Try an nginx proxy

Author: alexcrichton

.buildpacks

@@ -2,4 +2,4 @@ https://github.com/rcaught/heroku-buildpack-cmake
 https://github.com/alexcrichton/heroku-buildpack-zlib-pkgconfig
 https://github.com/alexcrichton/heroku-buildpack-rust
 https://github.com/tonycoco/heroku-buildpack-ember-cli.git
-
+https://github.com/ryandotsmith/nginx-buildpack.git

Procfile

@@ -1 +1 @@
-web: ./target/release/cargo-registry
+web: bin/start-nginx ./target/release/cargo-registry

config/nginx.conf.erb

@@ -0,0 +1,52 @@
+daemon off;
+#Heroku dynos have at least 4 cores.
+worker_processes <%= ENV['NGINX_WORKERS'] || 4 %>;
+
+events {
+	use epoll;
+	accept_mutex on;
+	worker_connections 1024;
+}
+
+http {
+        gzip on;
+        gzip_comp_level 2;
+        gzip_proxied any;
+        gzip_min_length 512;
+        gzip_types text/plain text/css application/json application/javascript application/x-javascript text/javascript text/xml application/xml application/rss+xml application/atom+xml application/rdf+xml image/svg+xml;
+
+	server_tokens off;
+
+	log_format l2met 'measure#nginx.service=$request_time request_id=$http_x_request_id';
+	access_log logs/nginx/access.log l2met;
+	error_log logs/nginx/error.log;
+
+	include mime.types;
+	default_type application/octet-stream;
+	sendfile on;
+
+	#Must read the body in 5 seconds.
+	client_body_timeout 5;
+
+	upstream app_server {
+		server localhost:8888 fail_timeout=0;
+ 	}
+
+	server {
+		listen <%= ENV["PORT"] %>;
+		server_name _;
+		keepalive_timeout 5;
+
+                location ~ ^/assets/ {
+                        add_header Cache-Control public;
+                        root dist;
+                        expires max;
+                }
+		location / {
+			proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+			proxy_set_header Host $http_host;
+			proxy_redirect off;
+			proxy_pass http://app_server;
+		}
+	}
+}

src/main.rs

@@ -6,7 +6,7 @@ extern crate git2;
 
 use std::os;
 use std::sync::Arc;
-use std::io::{mod, fs};
+use std::io::{mod, fs, File};
 use civet::Server;
 
 fn main() {
@@ -51,10 +51,18 @@ fn main() {
     }
     let app = cargo_registry::middleware(Arc::new(app));
 
-    let port = os::getenv("PORT").and_then(|s| from_str(s.as_slice()))
-                                 .unwrap_or(8888);
+    let heroku = os::getenv("HEROKU").is_some();
+    let port = if heroku {
+        8888
+    } else {
+        os::getenv("PORT").and_then(|s| from_str(s.as_slice()))
+                          .unwrap_or(8888)
+    };
     let _a = Server::start(civet::Config { port: port, threads: 8 }, app);
     println!("listening on port {}", port);
+    if heroku {
+        File::create(&Path::new("/tmp/app-initialized")).unwrap();
+    }
     wait_for_sigint();
 }