openresty(lua-API-请求相关)

init         #init_by_lua*.
init_worker    #init_worker_by_lua*.
ssl_cert        #ssl_certificate_by_lua*.
ssl_session_fetch     #ssl_session_fetch_by_lua*.
ssl_session_store     #ssl_session_store_by_lua*.
set                    #set_by_lua*.
rewrite            #rewrite_by_lua*.
balancer        #balancer_by_lua*.
access        #access_by_lua*.
content       #content_by_lua*.
header_filter    #header_filter_by_lua*.
body_filter        #body_filter_by_lua*.
log            #log_by_lua*.
timer          #ngx.timer.*.

location /test {
    default_type text/html;
    content_by_lua_block {
        ngx.print(ngx.req.raw_header())
        ngx.print(ngx.req.raw_header(true))
    }
 }
[root@192 ~]# curl localhost/test
GET /test HTTP/1.1
User-Agent: curl/7.29.0
Host: localhost
Accept: */*

User-Agent: curl/7.29.0
Host: localhost
Accept: */*

rewrite ^ /foo last;  #配置

rewrite ^ /foo break;

location /test {
     rewrite_by_lua_block {
         local uri = ngx.re.sub(ngx.var.uri, "^/test/(.*)", "/$1", "o")
         ngx.req.set_uri(uri)
     }
     proxy_pass http://my_backend;
 }

location /test {
     rewrite ^/test/(.*) /$1 break;
     proxy_pass http://my_backend;
}

rewrite ^ /foo?a=3? last;

location = /test {
     content_by_lua_block {
         local args, err = ngx.req.get_uri_args(100)

         if err == "truncated" then
             -- 超过了最大参数个数会到此
         end

         for key, val in pairs(args) do
             if type(val) == "table" then
                 ngx.say(key, ": ", table.concat(val, ", "))
             else
                 ngx.say(key, ": ", val)
             end
         end
     }
 }
[root@192 ~]# curl 'localhost/test?name=freecls&name=222&age=22&has_equal=&no_equal'
no_equal: true
name: freecls, 222
has_equal: 
age: 22

location = /test {
     content_by_lua_block {
     	 ngx.req.read_body()
         local args, err = ngx.req.get_post_args()

         if err == "truncated" then
             -- 超过了最大参数个数会到此
         end
         for key, val in pairs(args) do
             if type(val) == "table" then
                 ngx.say(key, ": ", table.concat(val, ", "))
             else
                 ngx.say(key, ": ", val)
             end
         end
     }
 }
[root@192 ~]# curl 'localhost/test' -d 'name=freecls&name=222&age=22&has_equal=&no_equal'
err:nil
no_equal: true
name: freecls, 222
has_equal: 
age: 22

location = /test {
     content_by_lua_block {
         local h, err = ngx.req.get_headers()

         if err == "truncated" then
             -- 超过最大请求头限制
         end
         for key, val in pairs(h) do
             if type(val) == "table" then
                 ngx.say(key, ": ", table.concat(val, ", "))
             else
                 ngx.say(key, ": ", val)
             end
         end
         
        --通过 nginx 内部变量获取
        -- 注意连字符 - 将会被转化为 _
         ngx.say(ngx.var["http_head_cus"])
     }
 }
[root@192 ~]# curl localhost/test -H "Head-Cus: freecls" -H "name: 1" -H "name: 2" -H "head-cus: cus2"
host: localhost
user-agent: curl/7.29.0
accept: */*
name: 1, 2
head-cus: freecls, cus2
freecls

location /test {
     set $footer '';

     proxy_pass http://some-backend;

     header_filter_by_lua_block {
         if ngx.header["X-My-Header"] == "blah" then
             ngx.var.footer = "some value"
         end
     }

     echo_after_body $footer;
 }

location = /test {
     content_by_lua_block {
         local h, err = ngx.resp.get_headers()

         if err == "truncated" then
             -- 超过最大请求头限制
         end
         for key, val in pairs(h) do
             if type(val) == "table" then
                 ngx.say(key, ": ", table.concat(val, ", "))
             else
                 ngx.say(key, ": ", val)
             end
         end
         
     }
 }
[root@192 ~]# curl localhost/test
connection: keep-alive
content-type: application/octet-stream

ngx.req.init_body(128 * 1024)  -- buffer is 128KB
for chunk in next_data_chunk() do
    ngx.req.append_body(chunk) -- 一次读取 4KB
end
ngx.req.finish_body()

location = /test {
     content_by_lua_block {

     	 ngx.say(ngx.today())
     	 ngx.say(ngx.time())
     	 ngx.say(ngx.now())
     	 ngx.say(ngx.localtime())
     	 ngx.say(ngx.utctime())
     	 ngx.say(ngx.cookie_time(ngx.time()))
     	 ngx.say(ngx.http_time(ngx.time()))
     	 ngx.say(ngx.parse_http_time("Thu, 18 Nov 2010 11:27:35 GMT"))
	          	 
     }
 }
[root@192 ~]# curl 'localhost/test'
2018-08-01
1533134658
1533134658.555
2018-08-01 22:44:18
2018-08-01 14:44:18
Wed, 01-Aug-18 14:44:18 GMT
Wed, 01 Aug 2018 14:44:18 GMT
1290079655