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1.rewrite使用break结，使用last会对server标签重新发起请求

location /a/ {
    rewrite ^/a/(.*)$ /b/$1 break;
    proxy_pass https://www.haiyun.me;
}

2.proxy_pass结尾添加/会丢弃路径目录，如下访问/a/test.html会代理到/test.html

location /a/ {
    rewrite ^/a/(.*)$ /b/$1 break;
    proxy_pass https://www.haiyun.me/;
}

3.代理访问重定向的网址：

proxy_redirect https://www.haiyun.me/ http://$host/;

location / {
    set $bindip '';
    content_by_lua_file '/usr/local/nginx/lua/proxy.lua';
} 
location /proxy {
    proxy_pass       "http://$host$request_uri";
    proxy_bind       $bindip;
}

local action = ngx.var.request_method
if action == "POST" then
    method = ngx.HTTP_POST
else
    method = ngx.HTTP_GET
end
res = ngx.location.capture(
    '/proxy', { method = method, always_forward_body = true, copy_all_vars = true }
    )
ngx.print(res.body)
ngx.print(res.status)

git clone https://github.com/liseen/lua-resty-http.git

Nginx配置：

http
{
    llua_package_path "/path/to/lua-resty-http/lib/?.lua;;";
    server {
        location /test {
            content_by_lua_file '/usr/local/nginx/conf/lua/proxy.lua';
        }
}

Proxy.lua内容：

local http = require "resty.http"
local hc = http:new()
local url = "http://"
if ngx.var.http_host then
    url = url .. ngx.var.http_host 
end
url = url .. ngx.var.request_uri  -- 拼接完整的URL
if ngx.var.args then
    url = url .. "?" .. ngx.var.args
end
--[[
local ok, code, headers, status, body = hc:proxy_pass {
url = url,
proxy = "http://192.168.1.5:8118",
timeout = 3000,
headers = ngx.req.get_headers(), -- 传递客户端HEAD
method = ngx.var.request_method, -- 传递客户端method
method = "GET",
}
]]
local ok, code, headers, status, body = hc:request {
    url = url,
    proxy = "http://192.168.1.5:8118",
    timeout = 3000,
    headers = {UserAgent = "Mozilla/5.0"},
    headers = ngx.req.get_headers(), 
    method = ngx.var.request_method,
}
ngx.say(ok)
ngx.say(code)
ngx.say(body)
ngx.say(url)

更多：http://wendal.net/422.html

安装LuaJIT：

wget http://luajit.org/download/LuaJIT-2.0.2.tar.gz
tar zxvf LuaJIT-2.0.2.tar.gz 
make && make install PREFIX=/usr/local/luajit2.02
echo "/usr/local/luajit2.02/lib" > /etc/ld.so.conf.d/luajit.conf
export LUAJIT_LIB=/usr/local/luajit2.02/lib/
export LUAJIT_INC=/usr/local/luajit2.02/include/

安装Nginx及Ngx_lua模块：

wget http://nginx.org/download/nginx-1.4.4.tar.gz
tar zxvf nginx-1.4.4.tar.gz 
cd nginx-1.4.4/
wget -O ngx_devel_kit0.2.19.tar.gz https://github.com/simpl/ngx_devel_kit/archive/v0.2.19.tar.gz
tar zxvf ngx_devel_kit0.2.19.tar.gz
wget -O lua-nginx0.9.3.tar.gz https://github.com/chaoslawful/lua-nginx-module/archive/v0.9.3.tar.gz
tar zxvf lua-nginx0.9.3.tar.gz 
./configure --prefix=/usr/local/nginx1.4.4 --conf-path=/etc/nginx/nginx.conf --with-ipv6 \
--with-http_ssl_module --add-module=./ngx_devel_kit-0.2.19/ --add-module=./lua-nginx-module-0.9.3/ 
make && make install

测试：

location /lua {
    default_type 'text/plain';
    content_by_lua "ngx.print(ngx.var['arg_tag'], '\\n')";
}

访问：

curl -i '192.168.1.2/lua?tag=hello'

编译安装LNMP太繁琐，不易部署和管理，通过系统源安装最很方便，Centos官方源软件包较少，需先安装EPEL源。
安装MysQL：

yum install mysql-server
/etc/init.d/mysqld start
chkconfig mysqld on
/usr/bin/mysqladmin -u root password 'newpasswd'

安装PHP：

yum install php-fpm php-cli php-mysqlnd php-pdo php-xml php-gd php-opcache
/etc/init.d/php-fpm start
chkconfig php-fpm on

安装Nginx：

yum install nginx
/etc/init.d/nginx start
chkconfig nginx on