#!/bin/bash
set -e -x
export DEBIAN_FRONTEND=noninteractive
apt-get update
cd /home/ubuntu

# download nginx
curl -O http://www.nginx.org/download/nginx-0.7.65.tar.gz &&
curl -O http://pushmodule.slact.net/downloads/nginx_http_push_module-0.692.tar.gz &&
tar -xzvf nginx-0.7.65.tar.gz  &&
tar -xvzf nginx_http_push_module-0.692.tar.gz  &&
curl -L -O http://downloads.sourceforge.net/pcre/pcre-8.01.tar.gz &&
tar -xzf pcre-8.01.tar.gz &&
apt-get install libssl-dev -y

# compile nginx
cd nginx-0.7.65
./configure --add-module=../nginx_http_push_module-0.692 --with-http_flv_module --user=apache --group=apache --with-http_gzip_static_module --with-pcre=../pcre-8.01
make && make install

# configure nginx
mv /usr/local/nginx/conf/nginx.conf /usr/local/nginx/conf/orig.nginx.conf

# ec2 can't handle line breaks properly in user-data scripts
# note also the escaped dollars
echo -e "user  apache;\nworker_processes  8;\n\nerror_log  logs/error.log;\n\nevents {\n    worker_connections  100024;\n}\n\n\nhttp {\n    include       mime.types;\n    default_type  application/octet-stream;\n    \n    sendfile        on;\n    keepalive_timeout  65;\n    \n    push_max_reserved_memory 250M;\n    \n    server {\n        listen       80;\n        server_name  localhost;\n        \n        # proxy all requests to apache, which should run on a different port.\n        location / {\n            rewrite ^(.*) http://mclaren.com\$1;\n        }\n        # serve the feed ourselves\n        location /feed {\n            push_channel_group pushmodule_chat;\n            \n            location /feed/publish {\n                set \$push_channel_id mclaren; #static channel id\n                push_publisher;\n                push_message_timeout 5m;\n                push_message_buffer_length 0;\n            }\n            location /feed/subscribe {\n                set \$push_channel_id mclaren; #static channel id\n                push_subscriber;\n                send_timeout 3600; #so that nginx won't drop connections willy-nilly\n            }\n        }\n        location = /test.html {\n            root /var/www/html/test;\n        }\n    }\n}" >/usr/local/nginx/conf/nginx.conf

# add nginx user
groupadd apache
useradd -c "Apache Server" -d /dev/null -g apache -s /bin/false apache

# configure limits for performance
ulimit -n 999999
echo "*       hard    nofile          999999" >>/etc/security/limits.conf
echo "*       hard    nproc           999999" >>/etc/security/limits.conf
echo "*       soft    nofile          999999" >>/etc/security/limits.conf
echo "*       soft    nproc           999999" >>/etc/security/limits.conf
echo "1024 65535" > /proc/sys/net/ipv4/ip_local_port_range # add more ephemeral ports

# run nginx
/usr/local/nginx/sbin/nginx

echo "any subsequent errors are not the fault of nginx startup script"