我正在尝试向客户提供维护页面,以便在维护时向我的应用程序发出请求.以下是我的Nginx配置.
server {
recursive_error_pages on;
listen 80;
...
if (-f $document_root/maintenance.html) {
return 503;
}
error_page 404 /404.html;
error_page 500 502 504 /500.html;
error_page 503 @503;
location = /404.html {
root $document_root;
}
location = /500.html {
root $document_root;
}
location @503 {
error_page 405 =/maintenance.html;
if (-f $request_filename) {
break;
}
rewrite ^(.*)$/maintenance.html break;
}
}
假设我已经通过创建$document_root / maintenance.html来启用我的网站维护.当用户使用带有text / html的Accept标头发出请求时,会正确地提供此文件.
$curl http://server.com/ -i -v -X GET -H "Accept: text/html"
* Adding handle: conn: 0xf89420
* Adding handle: send: 0
* Adding handle: recv: 0
* Curl_addHandleToPipeline: length: 1
* - Conn 0 (0xf89420) send_pipe: 1,recv_pipe: 0
* About to connect() to server.com port 80 (#0)
* Trying xxx.xxx.xxx.xxx...
* Connected to server.com (xxx.xxx.xxx.xxx) port 80 (#0)
> GET / HTTP/1.1
> User-Agent: curl/7.33.0
> Host: server.com
> Accept: text/html
>
< HTTP/1.1 503 Service Temporarily Unavailable
HTTP/1.1 503 Service Temporarily Unavailable
* Server Nginx/1.1.19 is not blacklisted
< Server: Nginx/1.1.19
Server: Nginx/1.1.19
< Date: Thu,14 Nov 2013 11:16:16 GMT
Date: Thu,14 Nov 2013 11:16:16 GMT
< Content-Type: text/html
Content-Type: text/html
< Content-Length: 27
Content-Length: 27
< Connection: keep-alive
Connection: keep-alive
<
This is under maintenance.
* Connection #0 to host server.com left intact
现在一些客户端将Accept标头设置为application / json.如何向他们发送JSON响应而不是maintenance.html？
以下是将Accept设置为application / json时得到的响应.
$curl http://server.com/ -i -v -X GET -H "Accept: application/json"
* Adding handle: conn: 0x190c430
* Adding handle: send: 0
* Adding handle: recv: 0
* Curl_addHandleToPipeline: length: 1
* - Conn 0 (0x190c430) send_pipe: 1,recv_pipe: 0
* About to connect() to server.com port 80 (#0)
* Trying xxx.xxx.xxx.xxx...
* Connected to server.com (xxx.xxx.xxx.xxx) port 80 (#0)
> GET / HTTP/1.1
> User-Agent: curl/7.33.0
> Host: server.com
> Accept: application/json
>
< HTTP/1.1 503 Service Temporarily Unavailable
HTTP/1.1 503 Service Temporarily Unavailable
* Server Nginx/1.1.19 is not blacklisted
< Server: Nginx/1.1.19
Server: Nginx/1.1.19
< Date: Thu,14 Nov 2013 11:15:50 GMT
Date: Thu,14 Nov 2013 11:15:50 GMT
< Content-Type: text/html
Content-Type: text/html
< Content-Length: 27
Content-Length: 27
< Connection: keep-alive
Connection: keep-alive
<
This is under maintenance.
* Connection #0 to host server.com left intact
最佳答案
尝试使用地图
map $http_accept $maintenance_page {
default /maintenance.html;
~application/json /maintenance.json;
}
然后用$maintenance_page替换/maintenance.html
关于http://nginx.org/en/docs/http/ngx_http_map_module.html的更多细节