某些指令无法用于子请求 Location 配置 -------------------------------------------------------------- [ngx.location.capture](#ngxlocationcapture) 和 [ngx.location.capture_multi](#ngxlocationcapture_multi) 指令无法抓取包含以下指令的 location： [add_before_body](http://nginx.org/en/docs/http/ngx_http_addition_module.html#add_before_body), [add_after_body](http://nginx.org/en/docs/http/ngx_http_addition_module.html#add_after_body), [auth_request](http://nginx.org/en/docs/http/ngx_http_auth_request_module.html#auth_request), [echo_location](http://github.com/openresty/echo-nginx-module#echo_location), [echo_location_async](http://github.com/openresty/echo-nginx-module#echo_location_async), [echo_subrequest](http://github.com/openresty/echo-nginx-module#echo_subrequest), 或 [echo_subrequest_async](http://github.com/openresty/echo-nginx-module#echo_subrequest_async) 。 ```nginx location /foo { content_by_lua ' res = ngx.location.capture("/bar") '; } location /bar { echo_location /blah; } location /blah { echo "Success!"; } ``` ```nginx $ curl -i http://example.com/foo ``` 将不会如预期一样的工作。 > English Source The [ngx.location.capture](#ngxlocationcapture) and [ngx.location.capture_multi](#ngxlocationcapture_multi) directives cannot capture locations that include the [add_before_body](http://nginx.org/en/docs/http/ngx_http_addition_module.html#add_before_body), [add_after_body](http://nginx.org/en/docs/http/ngx_http_addition_module.html#add_after_body), [auth_request](http://nginx.org/en/docs/http/ngx_http_auth_request_module.html#auth_request), [echo_location](http://github.com/openresty/echo-nginx-module#echo_location), [echo_location_async](http://github.com/openresty/echo-nginx-module#echo_location_async), [echo_subrequest](http://github.com/openresty/echo-nginx-module#echo_subrequest), or [echo_subrequest_async](http://github.com/openresty/echo-nginx-module#echo_subrequest_async) directives. ```nginx location /foo { content_by_lua ' res = ngx.location.capture("/bar") '; } location /bar { echo_location /blah; } location /blah { echo "Success!"; } ``` ```nginx $ curl -i http://example.com/foo ``` will not work as expected. [返回目录](#nginx-api-for-lua)