nginx lua api translation
The Nginx api for lua mentioned here refers to the nginx.conf file Use the *_by_lua and *_by_lua_file instructions to use lua code to provide specialized APIs for lua.
syntax:val = ngx.arg[index]
context: set_by_lua*, body_filter_by_lua*
By using valua = ngx.arg[n] , let nginx variables be passed into lua as parameters to call lua. The usage method is as follows: the value of<span>location</span> /foo <span>{</span><span>set</span><span>$a</span><span>32</span><span>;</span><span>set</span><span>$b</span><span>56</span><span>;</span>
set_by_lua <span>$sum</span><span>'return tonumber(ngx.arg[1]) + tonumber(ngx.arg[2])'</span><span>$a</span><span>$b</span><span>;</span>
echo <span>$sum</span><span>;</span><span>}</span>syntax:ngx.var.VAR_NAME
context: set_by_lua*, rewrite_by_lua*, access _by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua* , log_by_lua*You can read and write nginx variables through the following code
value = ngx.var.some_nginx_variable_namengx.var.some_nginx_variable_name=value
<span>location</span> /foo <span>{</span><span>set</span><span>$my_var</span><span>''</span><span>;</span><span><em># this line is required to create $my_var at config time</em></span>
content_by_lua <span>'
ngx.var.my_var = 123;
...
'</span><span>;</span><span>}</span>context:init_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua, *log_by_lua*, ngx.timer.*Some core constants
ngx.OK <span>(</span><span>0</span><span>)</span> ngx.ERROR <span>(</span>-<span>1</span><span>)</span> ngx.AGAIN <span>(</span>-<span>2</span><span>)</span> ngx.DONE <span>(</span>-<span>4</span><span>)</span> ngx.DECLINED <span>(</span>-<span>5</span><span>)</span>
context: init_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua, log_by_lua*, ngx.timer.*
ngx.HTTP_GET ngx.HTTP_HEAD ngx.HTTP_PUT ngx.HTTP_POST ngx.HTTP_DELETE ngx.HTTP_OPTIONS (added in the v0.5.0rc24 release) ngx.HTTP_MKCOL (added in the v0.8.2 release) ngx.HTTP_COPY (added in the v0.8.2 release) ngx.HTTP_MOVE (added in the v0.8.2 release) ngx.HTTP_PROPFIND (added in the v0.8.2 release) ngx.HTTP_PROPPATCH (added in the v0.8.2 release) ngx.HTTP_LOCK (added in the v0.8.2 release) ngx.HTTP_UNLOCK (added in the v0.8.2 release) ngx.HTTP_PATCH (added in the v0.8.2 release) ngx.HTTP_TRACE (added in the v0.8.2 release)
context:init_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua, log_by_lua*, ngx.timer.*
value <span>=</span> ngx.HTTP_OK <span>(</span><span>200</span><span>)</span> value <span>=</span> ngx.HTTP_CREATED <span>(</span><span>201</span><span>)</span> value <span>=</span> ngx.HTTP_SPECIAL_RESPONSE <span>(</span><span>300</span><span>)</span> value <span>=</span> ngx.HTTP_MOVED_PERMANENTLY <span>(</span><span>301</span><span>)</span> value <span>=</span> ngx.HTTP_MOVED_TEMPORARILY <span>(</span><span>302</span><span>)</span> value <span>=</span> ngx.HTTP_SEE_OTHER <span>(</span><span>303</span><span>)</span> value <span>=</span> ngx.HTTP_NOT_MODIFIED <span>(</span><span>304</span><span>)</span> value <span>=</span> ngx.HTTP_BAD_REQUEST <span>(</span><span>400</span><span>)</span> value <span>=</span> ngx.HTTP_UNAUTHORIZED <span>(</span><span>401</span><span>)</span> value <span>=</span> ngx.HTTP_FORBIDDEN <span>(</span><span>403</span><span>)</span> value <span>=</span> ngx.HTTP_NOT_FOUND <span>(</span><span>404</span><span>)</span> value <span>=</span> ngx.HTTP_NOT_ALLOWED <span>(</span><span>405</span><span>)</span> value <span>=</span> ngx.HTTP_GONE <span>(</span><span>410</span><span>)</span> value <span>=</span> ngx.HTTP_INTERNAL_SERVER_ERROR <span>(</span><span>500</span><span>)</span> value <span>=</span> ngx.HTTP_METHOD_NOT_IMPLEMENTED <span>(</span><span>501</span><span>)</span> value <span>=</span> ngx.HTTP_SERVICE_UNAVAILABLE <span>(</span><span>503</span><span>)</span> value <span>=</span> ngx.HTTP_GATEWAY_TIMEOUT <span>(</span><span>504</span><span>)</span><span>(</span>first added in the v0.3.1rc38 release<span>)</span>
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua, log_by_lua*, ngx.timer.*
Some level constants of
ngx.STDERR ngx.EMERG ngx.ALERT ngx.CRIT ngx.ERR ngx.WARN ngx.NOTICE ngx.INFO ngx.DEBUG
syntax: print(...)
context:init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua, log_by_lua*, ngx.timer.*This API uses the log level of ngx.NOTICE to write the parameter value into the error.log file, which is equivalent to ngx.log(ngx.NOTICE,...)
context:init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua, log_by_lua*, ngx.timer.*
ngx.ctx.xxx xxx is any variable name, ngx.ctx can be regarded as a temporary dictionary, The scope is each request, which means that different requests have different ngx.ctxAs in the example below
<span>location</span> /test <span>{</span>
rewrite_by_lua <span>'
ngx.say("foo = ", ngx.ctx.foo)
ngx.ctx.foo = 76
'</span><span>;</span>
access_by_lua <span>'
ngx.ctx.foo = ngx.ctx.foo + 3
'</span><span>;</span>
content_by_lua <span>'
ngx.say(ngx.ctx.foo)
'</span><span>;</span><span>}</span> foo = nil
<span>79</span>Look at the example below again
<span>location</span> /sub <span>{</span>
content_by_lua <span>'
ngx.say("sub pre: ", ngx.ctx.blah)
ngx.ctx.blah = 32
ngx.say("sub post: ", ngx.ctx.blah)
'</span><span>;</span><span>}</span>
<span>location</span> /main <span>{</span>
content_by_lua <span>'
ngx.ctx.blah = 73
ngx.say("main pre: ", ngx.ctx.blah)
local res = ngx.location.capture("/sub")
ngx.print(res.body)
ngx.say("main post: ", ngx.ctx.blah)
'</span><span>;</span><span>}</span> main pre: <span>73</span>
sub pre: nil
sub post: <span>32</span>
main post: <span>73</span>In addition, in the init_worker_by_lua instruction, we can initialize ngx.ctx in the form of a dictionary
ngx.ctx = {foo = 32, bar = 54}
syntax: res = ngx.location.capture(uri, options?)
context: rewrite_by_lua*, access_by_lua*, content_by_lua*通过这个api，lua可以访问本server的其他location，只能是同一个server的。用法如下
res <span>=</span> ngx.location.capture<span>(</span>uri<span>)</span>
-capture函数除了url还有其他参数可以选择，包括
-method 设置访问的method类型
-body 设置访问子请求的httpbody内容
-args设置请求的参数
ngx.location.capture<span>(</span><span>'/foo?a=1'</span>,
<span>{</span> args <span>=</span><span>{</span> b <span>=</span><span>3</span>, c <span>=</span><span>':'</span><span>}</span><span>}</span><span>)</span>ngx.location.capture<span>(</span><span>'/foo?a=1&b=3&c=%3a'</span><span>)</span>
<span>location</span> /sub <span>{</span>
content_by_lua <span>'
ngx.ctx.foo = "bar";
'</span><span>;</span><span>}</span><span>location</span> /lua <span>{</span>
content_by_lua <span>'
local ctx = {}
res = ngx.location.capture("/sub", { ctx = ctx })
ngx.say(ctx.foo);
ngx.say(ngx.ctx.foo);
'</span><span>;</span><span>}</span>结果如下,仅仅是设置ctx这个字典的值，而不是共享ngx.ctx
bar
nil<span>location</span> /other <span>{</span>
content_by_lua <span>'
ngx.say("dog = ", ngx.var.dog)
ngx.say("cat = ", ngx.var.cat)
'</span><span>;</span><span>}</span>
<span>location</span> /lua <span>{</span><span>set</span><span>$dog</span><span>''</span><span>;</span><span>set</span><span>$cat</span><span>''</span><span>;</span>
content_by_lua <span>'
res = ngx.location.capture("/other",
{ vars = { dog = "hello", cat = 32 }});
ngx.print(res.body)
'</span><span>;</span><span>}</span> dog = hello
cat = 32<span>location</span> /other <span>{</span><span>set</span><span>$dog</span><span>"$dog world"</span><span>;</span>
echo <span>"$uri dog: $dog"</span><span>;</span><span>}</span>
<span>location</span> /lua <span>{</span><span>set</span><span>$dog</span><span>'hello'</span><span>;</span>
content_by_lua <span>'
res = ngx.location.capture("/other",
{ copy_all_vars = true });
ngx.print(res.body)
ngx.say(ngx.var.uri, ": ", ngx.var.dog)
'</span><span>;</span><span>}</span> /other dog: hello world
/lua: hello<span>location</span> /other <span>{</span><span>set</span><span>$dog</span><span>"$dog world"</span><span>;</span>
echo <span>"$uri dog: $dog"</span><span>;</span><span>}</span>
<span>location</span> /lua <span>{</span><span>set</span><span>$dog</span><span>'hello'</span><span>;</span>
content_by_lua <span>'
res = ngx.location.capture("/other",
{ share_all_vars = true });
ngx.print(res.body)
ngx.say(ngx.var.uri, ": ", ngx.var.dog)
'</span><span>;</span><span>}</span> /other dog: hello world
/lua: hello world-always_forward_body 如果body属性没有设置，这个属性设置为true，那将发送父请求的httpbody给子请求。
syntax: res1, res2, ... = ngx.location.capture_multi({ {uri, options?}, {uri, options?}, ... })
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
类似于上面的ngx.location.capture ，不过支持并行请求多个子请求 res1, res2, res3 <span>=</span> ngx.location.capture_multi<span>{</span><span>{</span><span>"/foo"</span>, <span>{</span> args <span>=</span><span>"a=3&b=4"</span><span>}</span><span>}</span>,
<span>{</span><span>"/bar"</span><span>}</span>,
<span>{</span><span>"/baz"</span>, <span>{</span> method <span>=</span> ngx.HTTP_POST, body <span>=</span><span>"hello"</span><span>}</span><span>}</span>,
<span>}</span>
<span>if</span> res1.status <span>==</span> ngx.HTTP_OK <span>then</span>
...
<span>end</span>
<span>if</span> res2.body <span>==</span><span>"BLAH"</span><span>then</span>
...
<span>end</span><span><em>-- construct the requests table</em></span><span>local</span> reqs <span>=</span><span>{</span><span>}</span><span>table.insert</span><span>(</span>reqs, <span>{</span><span>"/mysql"</span><span>}</span><span>)</span><span>table.insert</span><span>(</span>reqs, <span>{</span><span>"/postgres"</span><span>}</span><span>)</span><span>table.insert</span><span>(</span>reqs, <span>{</span><span>"/redis"</span><span>}</span><span>)</span><span>table.insert</span><span>(</span>reqs, <span>{</span><span>"/memcached"</span><span>}</span><span>)</span>
<span><em>-- issue all the requests at once and wait until they all return</em></span><span>local</span> resps <span>=</span><span>{</span> ngx.location.capture_multi<span>(</span>reqs<span>)</span><span>}</span>
<span><em>-- loop over the responses table</em></span><span>for</span> i, resp <span>in</span><span>ipairs</span><span>(</span>resps<span>)</span><span>do</span><span><em>-- process the response table "resp"</em></span><span>end</span>context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua, log_by_lua*
读取或者设置当前的请求响应状态，这个应该在发送内容给浏览器之前执行
ngx.status <span>=</span> ngx.HTTP_CREATED
status <span>=</span> ngx.statussyntax: ngx.header.HEADER = VALUE
syntax: value = ngx.header.HEADER
context: rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua, log_by_lua*
获取或者设置http header的值<span><em>-- equivalent to ngx.header["Content-Type"] = 'text/plain'</em></span>
ngx.header.content_type <span>=</span><span>'text/plain'</span><span>;</span>
ngx.header<span>[</span><span>"X-My-Header"</span><span>]</span><span>=</span><span>'blah blah'</span><span>;</span> ngx.header<span>[</span><span>'Set-Cookie'</span><span>]</span><span>=</span><span>{</span><span>'a=32; path=/'</span>, <span>'b=4; path=/'</span><span>}</span> Set-Cookie: <span>a</span>=<span>32</span>; <span>path</span>=<span>/</span>
Set-Cookie: <span>b</span>=<span>4</span>; <span>path</span>=<span>/</span><span>location</span> /test <span>{</span><span>set</span><span>$footer</span><span>''</span><span>;</span>
<span>proxy_pass</span><span>http</span>://some-backend<span>;</span>
header_filter_by_lua <span>'
if ngx.header["X-My-Header"] == "blah" then
ngx.var.footer = "some value"
end
'</span><span>;</span>
echo_after_body <span>$footer</span><span>;</span><span>}</span>syntax: headers = ngx.resp.get_headers(max_headers?, raw?)
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua, log_by_lua*
<span>local</span> h <span>=</span> ngx.resp.get_headers<span>(</span><span>)</span><span>for</span> k, v <span>in</span><span>pairs</span><span>(</span>h<span>)</span><span>do</span>
...
<span>end</span>syntax: secs = ngx.req.start_time()
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*
<span>local</span> request_time <span>=</span> ngx.now<span>(</span><span>)</span> - ngx.req.start_time<span>(</span><span>)</span>
syntax: num = ngx.req.http_version()
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*
获取请求的http versionsyntax: str = ngx.req.raw_header(no_request_line?)
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*
得到原http header的字符串文本内容ngx.<span>print</span><span>(</span>ngx.req.raw_header<span>(</span><span>)</span><span>)</span>
GET /t HTTP/1.1
Host: localhost
Connection: close
Foo: barsyntax: method_name = ngx.req.get_method()
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*
获得当前请求的method 名字syntax: ngx.req.set_method(method_id)
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*
设置覆盖此次请求的method名字syntax: ngx.req.set_uri(uri, jump?)
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*
作用与rewrite相同，其中jump默认为false，false的时候ngx.req.set_uri<span>(</span><span>"/foo"</span>, <span>false</span><span>)</span>
<span>rewrite</span> ^ /foo <span>break</span><span>;</span>
ngx.req.set_uri<span>(</span><span>"/foo"</span>, <span>true</span><span>)</span>
<span>rewrite</span> ^ /foo last<span>;</span>
syntax: ngx.req.set_uri_args(args)
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*
rewrite当前的请求参数ngx.req.set_uri_args<span>(</span><span>"a=3&b=hello%20world"</span><span>)</span>
ngx.req.set_uri_args<span>(</span><span>{</span> a <span>=</span><span>3</span>, b <span>=</span><span>"hello world"</span><span>}</span><span>)</span>syntax: args = ngx.req.get_uri_args(max_args?)
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua, log_by_lua*
获得请求的参数<span>location</span><span>=</span> /test <span>{</span>
content_by_lua <span>'
local args = ngx.req.get_uri_args()
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
'</span><span>;</span><span>}</span> foo: bar
bar: baz, blahsyntax: args, err = ngx.req.get_post_args(max_args?)
context: rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua, log_by_lua*
得到post提交的参数<span>location</span><span>=</span> /test <span>{</span>
content_by_lua <span>'
ngx.req.read_body()
local args, err = ngx.req.get_post_args()
if not args then
ngx.say("failed to get post args: ", err)
return
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
'</span><span>;</span><span>}</span><span><em># Post request with the body 'foo=bar&bar=baz&bar=blah'</em></span>
$ curl <span>--data</span><span>'foo=bar&bar=baz&bar=blah'</span> localhost<span>/</span><span>test</span> foo: bar
bar: baz, blahsyntax: headers = ngx.req.get_headers(max_headers?, raw?)
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua, log_by_lua*
获取当前请求的头信息<span>local</span> h <span>=</span> ngx.req.get_headers<span>(</span><span>)</span><span>for</span> k, v <span>in</span><span>pairs</span><span>(</span>h<span>)</span><span>do</span>
...
<span>end</span>ngx.say<span>(</span><span>"Host: "</span>, ngx.req.get_headers<span>(</span><span>)</span><span>[</span><span>"Host"</span><span>]</span><span>)</span>
syntax: ngx.req.set_header(header_name, header_value)
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua
设置当前的请求头ngx.req.set_header<span>(</span><span>"Content-Type"</span>, <span>"text/css"</span><span>)</span>
ngx.req.set_header<span>(</span><span>"Foo"</span>, <span>{</span><span>"a"</span>, <span>"abc"</span><span>}</span><span>)</span>syntax: ngx.req.clear_header(header_name)
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*
清除某一个请求头syntax: ngx.req.read_body()
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
在不阻塞nginx事件轮询的情况下读取客户端请求的bodyngx.req.read_body<span>(</span><span>)</span><span>local</span> args <span>=</span> ngx.req.get_post_args<span>(</span><span>)</span>
syntax: ngx.req.discard_body()
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
明确丢弃客户端请求bodysyntax: data = ngx.req.get_body_data()
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
以字符串的形式获得客户端的请求body内容syntax: file_name = ngx.req.get_body_file()
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
当发送文件请求的时候，获得文件的名字syntax: ngx.req.set_body_data(data)
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
设置客户端请求的bodysyntax: ngx.req.set_body_data(data)
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
通过filename来指定当前请求的file data。syntax: ngx.req.init_body(buffer_size?)
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*
创建一个当前请求的空白body的buffer，后续可以自己写入请求的body。 ngx.req.init_body<span>(</span><span>128</span><span>*</span><span>1024</span><span>)</span><span><em>-- buffer is 128KB</em></span><span>for</span> chunk <span>in</span> next_data_chunk<span>(</span><span>)</span><span> do</span>
ngx.req.append_body<span>(</span>chunk<span>)</span><span><em>-- each chunk can be 4KB</em></span><span>end</span>
ngx.req.finish_body<span>(</span><span>)</span>syntax: ngx.req.append_body(data_chunk)
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*
追加当前请求的http bodysyntax: ngx.req.finish_body()
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*
标志完成ngx.req.init_body的数据追加。syntax: tcpsock, err = ngx.req.socket()
syntax: tcpsock, err = ngx.req.socket(raw)
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
这个方法会返回一个只读的cosocket对象，用来读取当前请求的request http body内容。syntax: ngx.exec(uri, args?)
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
执行内部跳转根据url和请求参数 ngx.exec<span>(</span><span>'/some-location'</span><span>)</span><span>;</span>
ngx.exec<span>(</span><span>'/some-location'</span>, <span>'a=3&b=5&c=6'</span><span>)</span><span>;</span>
ngx.exec<span>(</span><span>'/some-location?a=3&b=5'</span>, <span>'c=6'</span><span>)</span><span>;</span><span>location</span> /foo <span>{</span>
content_by_lua <span>'
ngx.exec("@bar", "a=goodbye");
'</span><span>;</span><span>}</span>
<span>location</span><span>@bar</span><span>{</span>
content_by_lua <span>'
local args = ngx.req.get_uri_args()
for key, val in pairs(args) do
if key == "a" then
ngx.say(val)
end
end
'</span><span>;</span><span>}</span>syntax: ngx.redirect(uri, status?)
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
执行301或者302的重定向。syntax: ok, err = ngx.send_headers()
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
指定响应头。syntax: value = ngx.headers_sent
context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*
判断头部是否发送给客户端了。syntax: ok, err = ngx.print(...)
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
发送数据给客户端响应页面<span>local</span><span>table</span><span>=</span><span>{</span><span>"hello, "</span>,
<span>{</span><span>"world: "</span>, <span>true</span>, <span>" or "</span>, <span>false</span>,
<span>{</span><span>": "</span>, <span>nil</span><span>}</span><span>}</span><span>}</span>
ngx.<span>print</span><span>(</span><span>table</span><span>)</span>syntax: ok, err = ngx.say(...)
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
作用类似于ngx.printsyntax: ngx.log(log_level, ...)
context: init_by_lua*, init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*
向error.log中记录日志syntax: ok, err = ngx.flush(wait?)
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
将flush内容到客户端页面syntax: ngx.exit(status)
context: rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, ngx.timer.*
ngx.status <span>=</span> ngx.HTTP_GONE
ngx.say<span>(</span><span>"This is our own content"</span><span>)</span><span><em>-- to cause quit the whole request rather than the current phase handler</em></span>
ngx.<span>exit</span><span>(</span>ngx.HTTP_OK<span>)</span>当status==0的时候，跳过此次代码片段，并且继续执行下面的。
syntax: ok, err = ngx.eof()
context: rewrite_by_lua*, access_by_lua*, content_by_lua*
<span>location</span><span>=</span> /async <span>{</span><span>keepalive_timeout</span><span>0</span><span>;</span>
content_by_lua <span>'
ngx.say("got the task!")
ngx.eof() -- a descent HTTP client will close the connection at this point
-- access MySQL, PostgreSQL, Redis, Memcached, and etc here...
'</span><span>;</span><span>}</span>以上就介绍了nginx lua api翻译，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。
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