你需要了解的第一件事是,Cors配置是在后端添加的。您不需要从Angular2应用程序每个请求都发送cors头信息。如果理解这一点,通过在spring安全配置类中添加全局CORS配置很容易解决此问题。
首先,您需要创建一个过滤器bean:
@Component
@Order(Ordered.HIGHEST_PRECEDENCE)
public class MyCorsFilter implements Filter{
public MyCorsFilter () {
super();
}
@Override
public final void doFilter(final ServletRequest req, final ServletResponse res, final FilterChain chain) throws IOException, ServletException {
final HttpServletResponse response = (HttpServletResponse) res;
response.setHeader("Access-Control-Allow-Origin", "http://localhost:3000");
// without this header jquery.ajax calls returns 401 even after successful login and SSESSIONID being succesfully stored.
response.setHeader("Access-Control-Allow-Credentials", "true");
response.setHeader("Access-Control-Allow-Methods", "POST, PUT, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "X-Requested-With, Authorization, Origin, Content-Type, Version");
response.setHeader("Access-Control-Expose-Headers", "X-Requested-With, Authorization, Origin, Content-Type");
final HttpServletRequest request = (HttpServletRequest) req;
if (!request.getMethod().equals("OPTIONS")) {
chain.doFilter(req, res);
} else {
// do not continue with filter chain for options requests
}
}
@Override
public void destroy() {
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
}
步骤2:在您的Spring安全配置类中添加:
@Autowired
private MyCorsFilter myCorsFilter;
//CORS
http.addFilterBefore(myCorsFilter, ChannelProcessingFilter.class);
编辑: 此配置假定您在本地主机上运行了位于 localhost:3000 的 angular2 应用程序。
如果你正在使用Spring 4.2及以上版本,那么跨源资源共享(CORS)将得到一流的支持。请阅读页面。
你可以通过在类级别定义以下注释来轻松实现:
@CrossOrigin(origins = "http://localhost:3000", maxAge = 3600)