java 跨域问题_java跨域问题怎么解决

cors.png

1、详细错误信息是：

Access to XMLHttpRequest at ‘[http://appservice.wogame-dev.com/h5/game/getCdkDetail](http://appservice.wogame-dev.com/h5/game/getCdkDetail)’ from origin ‘[http://app.wogame-dev.com](http://app.wogame-dev.com)’ has been blocked by CORS policy: Request header field wg-token is not allowed by Access-Control-Allow-Headers in preflight response.

抓包查看http请求和响应，发现已允许跨域。说明跨域设置是成功了，只是HTTP Header缺少了一个字段，导致的报错。

11_30_08__12_07_2018.jpg

2、这里贴出java源码：

import org.apache.commons.lang.StringUtils;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.context.annotation.Configuration;

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

* 【跨域拦截器】

*/

@Configuration

public class CorsInterceptor extends HandlerInterceptorAdapter {

@Value(“${service.corsOrigin}”)

private String corsOrigins = “http://app.wogame-dev.com”;

@Override

public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

String origin = request.getHeader(“Origin”);

if (StringUtils.isNotBlank(origin) && corsOrigins.contains(origin)) {

response.setHeader(“Access-Control-Allow-Origin”, origin);

response.setHeader(“Access-Control-Allow-Headers”, “Origin, X-Requested-With, Content-Type, Accept, ” +

“WG-App-Version, WG-Device-Id, WG-Network-Type, WG-Vendor, WG-OS-Type, WG-OS-Version, WG-Device-Model, WG-CPU, WG-Sid, WG-App-Id, WG-Token”);

response.setHeader(“Access-Control-Allow-Methods”, “POST, GET”);

response.setHeader(“Access-Control-Allow-Credentials”, “true”);

}

/**设备默认值**/

response.setContentType(“application/json;charset=UTF-8”);

return true;

}

@Override

public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)

throws Exception {

super.afterCompletion(request, response, handler, ex);

}

}

缺少HTTP Header : WG-Token ,加上就跨域正常了。

PS： 前端报错说域名不一致，注意域名末尾不需要加斜杠

跨域提示错误.png

错误提示已描述得很清楚，自己看仔细即可。

Access to XMLHttpRequest at ‘[http://appservice.wogame-dev.com/h5/uc/getUserDetail](http://appservice.wogame-dev.com/h5/uc/getUserDetail)’ from origin ‘[http://app.wogame-dev.com](http://app.wogame-dev.com)’ has been blocked by CORS policy: The ‘Access-Control-Allow-Origin’ header has a value ‘[http://app.wogame-dev.com/](http://app.wogame-dev.com/)’ that is not equal to the supplied origin