openresty ngx_lua重定向

ngx.redirect：https://github.com/openresty/lua-nginx-module#ngxredirect

ngx.req.set_uri：https://github.com/openresty/lua-nginx-module#ngxreqset_uri

ngx.req.set_uri_args：http:// https://github.com/openresty/lua-nginx-module#ngxreqset_uri_args

ngx.exec：http:// https://github.com/openresty/lua-nginx-module#ngxexec

重定向

ngx.redirect：请求重定向

语法格式：ngx.redirect(uri, status?)
* 如果uri包含不安全的字符（控制字符），函数返回lua error
* status可选值：301、302（默认，临时重定向）、303、307、308环境：rewrite_by_lua*, access_by_lua*, content_by_lua*# 示例
return ngx.redirect("/foo")
return ngx.redirect("/foo", 301)
return ngx.redirect("/foo", 302)
return ngx.redirect("/foo", ngx.HTTP_MOVED_TEMPORARILY)return ngx.redirect("http://www.google.com")rewrite ^ /foo? redirect;  <==> return ngx.redirect('/foo')
rewrite ^ /foo? permanent; <==> return ngx.redirect('/foo', 301)return ngx.redirect('/foo?a=3&b=4')
* 带参数重定向

ngx.req.set_uri：请求重定向

语法格式：ngx.req.set_uri(uri, jump?, binary?)
* uri重写的路径参数，长度不能为0，否则会报错
* jump：是否进行服务端跳转，默认false环境：set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*# 示例
rewrite ^ /foo last;   <==>  ngx.req.set_uri("/foo", true)rewrite ^ /foo break; <==>  ngx.req.set_uri("/foo", false)ngx.req.set_uri("/foo")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;}

ngx.req.set_uri_args：设置ngx.req.set_uri的重定向参数

语法格式：ngx.req.set_uri_args(args)环境：context: set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*# 示例ngx.req.set_uri_args("a=3&b=hello%20world")ngx.req.set_uri_args({ a = 3, b = "hello world" })ngx.req.set_uri_args({ a = 3, b = {5, 6} })rewrite ^ /foo?a=3? last;  <==>ngx.req.set_uri_args("a=3")ngx.req.set_uri("/foo", true) <==>ngx.req.set_uri_args({a = 3})ngx.req.set_uri("/foo", true)

ngx.exec：内部重定向

语法格式：ngx.exec(uri, args?)环境：rewrite_by_lua*, access_by_lua*, content_by_lua*# 示例ngx.exec('/some-location')ngx.exec('/some-location', 'a=3&b=5&c=6')ngx.exec('/some-location?a=3&b=5', 'c=6')ngx.exec("/foo", { a = 3, b = "hello world" })location /foo {content_by_lua_block {ngx.exec("@bar", "a=goodbye")}}location @bar {content_by_lua_block {local args = ngx.req.get_uri_args()for key, val in pairs(args) doif key == "a" thenngx.say(val)endend}}

使用示例

default.conf

server {listen       80;server_name  localhost;location / {root   /usr/local/openresty/nginx/html;index  index.html index.htm;}#location 1location /break {root /usr/local/openresty/nginx/html2;if ( !-e $request_filename ){#rewrite ^/break/(.*)  /default/info  break;rewrite_by_lua_block {ngx.req.set_uri("/default/info", false);}}}#location 2location /break2 {root /usr/local/openresty/nginx/html2;if ( !-e $request_filename ){#rewrite ^/break2/(.*)  /default/info  break;rewrite_by_lua_block {ngx.req.set_uri("/default/info", false);}echo "break";}}#location 3location /last {if ( !-e $request_filename ){#rewrite ^/last/(.*)  /test/$1  last;rewrite_by_lua_block {ngx.req.set_uri("/test/$1", true);}echo "last";}}#location 4location /test {echo "test";}error_page   500 502 503 504  /50x.html;location = /50x.html {root   /usr/local/openresty/nginx/html;}}

本地文件

huli@hudeMacBook-Pro redirect2 % pwd
/Users/huli/lua/openresty/redirect2
huli@hudeMacBook-Pro redirect2 % ls html
default
huli@hudeMacBook-Pro redirect2 % ls html/default
info
huli@hudeMacBook-Pro redirect2 % cat html/default/info
break info

创建容器

huli@hudeMacBook-Pro redirect2 % docker run -it -d -p 4005:80 \
-v /Users/huli/lua/openresty/redirect2/html:/usr/local/openresty/nginx/html2 \
-v /Users/huli/lua/openresty/redirect2/default.conf:/etc/nginx/conf.d/default.conf \
--name open9 lihu12344/openresty

使用测试

huli@hudeMacBook-Pro redirect2 % curl localhost:4005/break
break info
huli@hudeMacBook-Pro redirect2 % curl localhost:4005/break/1
break infohuli@hudeMacBook-Pro redirect2 % curl localhost:4005/break2
breakhuli@hudeMacBook-Pro redirect2 % curl localhost:4005/last
test

使用示例 2

default2.conf

server {listen       80;server_name  localhost;#charset koi8-r;#access_log  /var/log/nginx/host.access.log  main;location / {root   /usr/share/nginx/html;index  index.html index.htm;}location /redirect {if ( !-e $request_filename ) {#rewrite ^/redirect/(.*)  /test/$1  redirect;rewrite_by_lua_block {ngx.redirect("/test/$1", 302);}}}location /permanent {if ( !-e $request_filename ) {#rewrite ^/permanent/(.*)  /test/$1 permanent;rewrite_by_lua_block {ngx.redirect("/test/$1", 301);}}}location /test {echo "test";}error_page   500 502 503 504  /50x.html;location = /50x.html {root   /usr/share/nginx/html;}}

创建容器

docker run -it -d -p 4006:80 \
-v /Users/huli/lua/openresty/redirect2/default2.conf:/etc/nginx/conf.d/default.conf \
--name open10 lihu12344/openresty

使用测试

huli@hudeMacBook-Pro redirect2 % curl -I localhost:4006/redirect
HTTP/1.1 302 Moved Temporarily
Server: openresty/1.21.4.1
Date: Mon, 11 Jul 2022 01:22:30 GMT
Content-Type: text/html
Content-Length: 151
Connection: keep-alive
Location: /test/$1huli@hudeMacBook-Pro redirect2 % curl -I localhost:4006/redirect/1
HTTP/1.1 302 Moved Temporarily
Server: openresty/1.21.4.1
Date: Mon, 11 Jul 2022 01:22:32 GMT
Content-Type: text/html
Content-Length: 151
Connection: keep-alive
Location: /test/$1huli@hudeMacBook-Pro redirect2 % curl -I localhost:4006/permanent
HTTP/1.1 301 Moved Permanently
Server: openresty/1.21.4.1
Date: Mon, 11 Jul 2022 01:22:35 GMT
Content-Type: text/html
Content-Length: 175
Connection: keep-alive
Location: /test/$1huli@hudeMacBook-Pro redirect2 % curl -I localhost:4006/permanent/1
HTTP/1.1 301 Moved Permanently
Server: openresty/1.21.4.1
Date: Mon, 11 Jul 2022 01:22:38 GMT
Content-Type: text/html
Content-Length: 175
Connection: keep-alive
Location: /test/$1