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); } }
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。
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
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