我在
Java Spring中不是很好,但我想在我的ResponseEntity中添加Cache-Control标头.
@RequestMapping(value = "/data/{id}",method = GET")
public ResponseEntity<String> getData(@PathVariable("id") String id) {
try {
...
HttpHeaders headers = new HttpHeaders();
headers.setCacheControl("max-age=600");
return new ResponseEntity<String>(body,headers,HttpStatus.OK);
}
}
我为HttpHeaders添加了两行代码,现在我在响应中得到两个Cache-Control头：
HTTP/1.1 200 OK Server: Apache-Coyote/1.1 X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block Cache-Control: no-cache,no-store,max-age=0,must-revalidate Pragma: no-cache Expires: 0 X-Frame-Options: DENY Strict-Transport-Security: max-age=31536000 ; includeSubDomains Cache-Control: max-age=600 Content-Type: application/json;charset=UTF-8 Content-Length: 18223 Date: Wed,29 Jun 2016 21:56:57 GMT
我做错了什么？有人能帮助我吗？
解决方法
TL; DR
只需将以下内容添加到application.properties：
security.headers.cache=false
更多细节
正如Spring Security documentation所述：
Spring Security allows users to easily inject the default security
headers to assist in protecting their application. The default for
Spring Security is to include the following headers:
Cache-Control: no-cache,must-revalidate Pragma: no-cache Expires: 0 X-Content-Type-Options: nosniff Strict-Transport-Security: max-age=31536000 ; includeSubDomains X-Frame-Options: DENY X-XSS-Protection: 1; mode=block
now I get 2 CacheControl headers in my response
其中一个由Spring Security提供.如果您不喜欢它们,可以在WebSecurityConfigurerAdapter中禁用默认的Cache-Control标头：
@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
// Other configurations
@Override
protected void configure(HttpSecurity http) throws Exception {
http
// Other configurations
.headers()
.cacheControl().disable();
}
}
由于您使用的是Spring Boot,因此可以使用security.headers.*属性实现相同功能.要禁用该默认的Cache-Control标头,只需将以下内容添加到application.properties：
security.headers.cache=false
此外,添加Cache-Control标头的更惯用的方法是使用新的cacheControl构建器：
ResponseEntity.ok()
.cacheControl(CacheControl.maxAge(600,TimeUnit.SECONDS))
.body(body);