springboot vue 跨域问题的解决

1、Spring Boot跨域配置有两种方法

在后端使用Spring Boot。Spring Boot跨域非常简单，只需书写以下代码即可。

@Configuration
public class CustomCORSConfiguration {
private CorsConfiguration buildConfig() {
 CorsConfiguration corsConfiguration = new CorsConfiguration();
 corsConfiguration.addAllowedOrigin("*");
 corsConfiguration.addAllowedHeader("*");
 corsConfiguration.addAllowedMethod("*");
  corsConfiguration.setAllowCredentials(true);
  return corsConfiguration;
}

@Bean
public CorsFilter corsFilter() {
 UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
 source.registerCorsConfiguration("/**", buildConfig());
 return new CorsFilter(source);
}
}

2.Nginx跨域配置

Spring Boot应用用Nginx反向代理。而前端跨域请求的需求不减。

Nginx跨域也比较简单，只需添加以下配置即可。

location / {
proxy_pass http://localhost:8080;
if ($request_method = 'OPTIONS') {
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range,Token';
add_header 'Access-Control-Max-Age' 1728000;
add_header 'Content-Type' 'text/plain; charset=utf-8';
add_header 'Content-Length' 0;
return 204;
}
if ($request_method = 'POST') {
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range,Token';
add_header 'Access-Control-Expose-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range,Token';
}
if ($request_method = 'GET') {
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range,Token';
add_header 'Access-Control-Expose-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range,Token';
}
}

其中：add_header 'Access-Control-Expose-Headers' 务必加上你请求时所带的header。

例如本例中的“Token”，其实是前端传给后端过来的。如果记不得也没有关系，浏览器的调试器会有详细说明。

三、浏览器设置跨域

Chrome、Firefox本身是可以通过配置支持跨域请求的。

Chrome跨域：参考文档：Chrome跨域

四、前端Vue设置跨域

先设置 axios

axios.defaults.withCredentials = true;
axios.defaults.headers.common['X-Requested-With'] = 'XMLHttpRequest'; //证明是ajax 请求
psot 请求加入
headers: {
 'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
}

设置Config 文件下面的index.js 然后就可以再其它页面访问了

来源：https://blog.csdn.net/sky786905664/article/details/79189378