在Spring Boot后端/ Angularjs前端应用程序中允许多个跨源？

Question

我在当前正在使用的Web应用程序中收到以下错误，这是ErrorCode：

XMLHttpRequest无法加载http://rev-final.staging.cashu.com:8080/merchants/signup 。 “ Access-Control-Allow-Origin”标头包含多个值“ *，*”，但只允许一个。 因此，不允许访问源' http：// localhost：3000 '。

所以我该怎么做才能解决这样的问题，并且解决方案必须从斜角侧或弹簧侧进行，因为我在寻找解决方案时都在两者上都找到了配置

Answer 1

只需在组件扫描包中添加下面的类，然后在spring之前一切都会处理。请参考此处以获取更多参考。

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, 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() {
}

}