本来以为是前端写的有问题,浏览器报错如下:
WebSocket connection to ‘ws://localhost:8088/xxx’ failed…
然后百度,google各种搜,后面发现后端控制台报错信息。解决了,就连接成功了。
springboot版本 v2.5.0
后端报错:
java.lang.IllegalArgumentException: When allowCredentials is true, allowedOrigins cannot contain the special value “*”
解决:
.setAllowedOriginPatterns("*").withSockJS()
新建跨域请求配置类:
@Configuration
public class CorsConfig {
private CorsConfiguration buildConfig() {
CorsConfiguration corsConfiguration = new CorsConfiguration();
corsConfiguration.setAllowCredentials(true); //sessionid 多次访问一致
// 允许访问的客户端域名
List<String> allowedOriginPatterns = new ArrayList<>();
allowedOriginPatterns.add("*");
corsConfiguration.setAllowedOriginPatterns(allowedOriginPatterns);
// corsConfiguration.addAllowedOrigin("*"); // 允许任何域名使用
corsConfiguration.addAllowedHeader("*"); // 允许任何头
corsConfiguration.addAllowedMethod("*"); // 允许任何方法(post、get等)
return corsConfiguration;
}
@Bean
public CorsFilter corsFilter() {
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
source.registerCorsConfiguration("/**", buildConfig()); // 对接口配置跨域设置
return new CorsFilter(source);
}
}
如果出现错误:
sockjs.js?9be2:1606 GET http://xxxxxxxx:8080/sockjs-node/info?t=1583642185049 net::ERR_CONNECTION_TIMED_OUT
在\node_modules\sockjs-client\dist\sockjs.js
注释代码:(ctrl+f搜全文)
// self.xhr.send(payload);
正常后浏览器打印: