- Access-Control-Allow-Ori
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gin: http://www.xxx.com
-
Access-Control-Max-Age:86400
-
Access-Control-Allow-Methods:GET, POST, OPTIONS, PUT, DELETE
-
Access-Control-Allow-Headers: content-type
-
Access-Control-Allow-Credentials: true
含义解释:
| CORS Header属性 | 解释 |
| Access-Control-Allow-Origin | 允许http://www.xxx.com域(自行设置,这里只做示例)发起跨域请求 |
| Access-Control-Max-Age | 设置在86400秒不需要再发送预校验请求 |
| Access-Control-Allow-Methods | 设置允许跨域请求的方法 |
| Access-Control-Allow-Headers | 允许跨域请求包含content-type |
| Access-Control-Allow-Credentials | 设置允许cookie |
二、SpringBoot跨域请求处理方式
====================
方法一、直接采用SpringBoot的注解@CrossOrigin(也支持SpringMVC)
简单粗暴的方式,Controller层在需要跨域的类或者方法上加上该注解即可
@RestController
@CrossOrigin
@RequestMapping("/situation")
public class SituationController extends PublicUtilController {
@Autowired
private SituationService situationService;
// log日志信息
private static Logger LOGGER = Logger.getLogger(SituationController.class);
}
但每个Controller都得加,太麻烦了,怎么办呢,加在Controller公共父类(PublicUtilController)中,所有Controller继承即可。
@CrossOrigin
public class PublicUtilController {
public PageInfoUtil proccedPageInfo(String currentPage, String pageSize) {
PageInfoUtil pageInfoUtil = new PageInfoUtil();
try {
pageInfoUtil.setCurrentPage(Integer.valueOf(currentPage));
pageInfoUtil.setPageSize(Integer.valueOf(pageSize));
} catch (NumberFormatException e) {
}
return pageInfoUtil;
}
}
**当然,这里虽然指SpringBoot,SpringMVC也是同样的,但要求在Spring4.2及以上的版本。**另外,如果SpringMVC框架版本不方便修改,也可以通过修改tomcat的web.xml配置文件来处理,请参照另一篇博文(nginx同理)
SpringMVC使用@CrossOrigin使用场景要求
- jdk1.8+
- Spring4.2+
方法二、处理跨域请求的Configuration
增加一个配置类,CrossOriginConfig.java。继承WebMvcConfigurerAdapter或者实现WebMvcConfigurer接口,其他都不用管,项目启动时,会自动读取配置。
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@Configuration
public class CorsConfig extends WebMvcConfigurerAdapter {
static final String ORIGINS[] = new String[] { “GET”, “POST”, “PUT”, “DELETE” };
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**").allowedOrigins("*").allowCredentials(true).allowedMethods(ORIGINS).maxAge(3600);
}
方法三、采用过滤器(filter)的方式
同方法二加配置类,增加一个CORSFilter 类,并实现Filter接口即可,其他都不用管,接口调用时,会过滤跨域的拦截。
@Component
public class CORSFilter implements Filter {
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletResponse res = (HttpServletResponse) response;
res.addHeader(“Access-Control-Allow-Credentials”, “true”);
res.addHeader(“Access-Control-Allow-Origin”, “*”);
res.addHeader(“Access-Control-Allow-Methods”, “GET, POST, DELETE, PUT”);
res.addHeader(“Access-Control-Allow-Headers”, “Content-Type,X-CAF-Authorization-Token,sessionToken,X-TOKEN”);
if (((HttpServletRequest) request).getMethod().equals(“OPTIONS”)) {
response.getWriter().println(“ok”);
return;
}



