log request and response header and body with openresty | 使用 openresty 记录请求和响应 http 头和 body

nginx.conf

server {
    listen       80;
    server_name  localhost;

    #charset koi8-r;
    #access_log  /var/log/nginx/host.access.log  main;
    error_log stderr info;

    location / {
        root   /usr/local/openresty/nginx/html;
        index  index.html index.htm;
        #lua_need_request_body on;
        set $resp_body "";
        set $req_body "";
        access_by_lua '
            ngx.req.read_body();
        ';
        body_filter_by_lua '
            ngx.ctx.buffered = (ngx.ctx.buffered or "") .. ngx.arg[1]
            if ngx.arg[2] then
                ngx.var.resp_body = ngx.ctx.buffered
            end
        ';
        log_by_lua '
            ngx.log(ngx.INFO, ngx.req.raw_header());
            ngx.log(ngx.INFO, ngx.status);
            ngx.log(ngx.INFO, ngx.req.get_body_data());
            local h = ngx.req.get_headers(30)
            for k, v in pairs(h) do
                ngx.log(ngx.INFO, v);
            end
            ngx.log(ngx.INFO, ngx.var.resp_body);
        ';
    }
}