Requests blocked by CORS policy in spring boot and angular
在本地启动Spring Boot后端和Angular前端调试时遇到跨域访问的问题导致前端请求失败。
错误描述
Access to XMLHttpRequest at 'http://localhost:8080/...' from origin 'http://localhost:4201' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
解决方案
添加一个Filter使后端支持跨域访问,Spring Boot会自动扫描Filter,无需手动添加。
import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Component; @Component public class SimpleCORSFilter implements Filter { private final Logger log = LoggerFactory.getLogger(SimpleCORSFilter.class); public SimpleCORSFilter() { log.info("SimpleCORSFilter init"); } @Override public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) req; HttpServletResponse response = (HttpServletResponse) res; response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin")); 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", "Content-Type, Accept, X-Requested-With, remember-me"); chain.doFilter(req, res); } @Override public void init(FilterConfig filterConfig) { } @Override public void destroy() { } }
参考:https://stackoverflow.com/questions/32319396/cors-with-spring-boot-and-angularjs-not-working
Keep it simple!
分类:
Java/Scala
, Web
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