Flask接口签名sign原理与实例代码浅析
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2023-03-17
Spring boot跨域设置实例详解
定义:跨域是指从一个域名的网页去请求另一个域名的资源
1.原由
公司内部有多个不同的子域,比如一个是location.company.com ,而应用是放在app.company.com , 这时想从 app.company.com去访问 location.company.com 的资源就属于跨域
本人是springboot菜鸟,但是做测试框架后端需要使用Springboot和前端对接,出现跨域问题,需要设置后端Response的Header.走了不少坑,在这总结一下以备以后使用
2.使用场景
浏览器默认不允许跨域访问,包括我们平时ajax也是限制跨域访问的。
产生跨域访问的情况主要是因为请求的发起者与请求的接受者1、域名不同;2、端口号不同
如果一个网页可以随意地访问另外一个网站的资源,那么就有可能在客户完全不知情的情况下出现安全问题
3.解决方案
通过设置Access-Control-Allow-Origin来实现跨域访问
4.具体解决
刚开始使用http://jianshu.com/p/f2060a6d6e3b设置,但是由于我们使用的spring版本的问题,CorsConfiguration类需要4.2.7版本。和我们使用的spring里面版本不一致,导致版本冲突或者各种问题
@Configuration
public class CorsConfig {
private CorsConfigurationhttp:// buildConfig() {
CorsConfiguration corsConfiguration = new CorsConfiguration();
corsConfiguration.addAllowedOrigin("*"); // 1
corsConfiguration.addAllowedHeader("*"); // 2
corsConfiguration.addAllowedMethod("*"); // 3
return corsConfiguration;
}
@Bean
public CorsFilter corsFilter() {
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
source.registerCorsConfiguration("/**", buildConfig()); // 4
return new CorsFilter(source);
}
}
后来改为Filter方式
@Component
public class CorsFilter implements Filter {
final static org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(CorsFiltehttp://r.class);
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
HttpServletRequest reqs = (HttpServletRequest) req;
response.setHeader("Access-Control-Allow-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", "x-requested-with");
chain.doFilter(req, res);
}
public void ihttp://nit(FilterConfig filterConfig) {}
public void destroy() {}
}
后来改为Filter方式
@Component
public class CorsFilter implements Filter {
final static org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(CorsFilter.class);
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
HttpServletRequest reqs = (HttpServletRequest) req;
response.setHeader("Access-Control-Allow-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", "x-requested-with");
chain.doFilter(req, res);
}
public void init(FilterConfig filterConfig) {}
public void destroy() {}
}
网上很多资料都是教按以上方法设置,但是我这里就是设置不成功的。出现下面问题
Fetch API cannot load https://atfcapi.alpha.elenet.me/atfcapi/project/mainPageList. The value of the 'Access-Control-Allow-Origin'
header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. Origin 'https://atfcapi-test.faas.elenet.me' is therefore not allowed access.
目前为止,不知道为什么这样配置不可以,然后改为设置单个域名,如下显示
response.setHeader("Access-Control-Allow-Origin", "https://atfcapi-test.faas.elenet.me");
这样设置就成功了,但是我们有好几个环境,同一套代码,写死一个域名并解决不了问题,
按照很多网络文章中所说,设置多个域名如下:
response.setHeader("Access-Control-Allow-Origin", "https://atfcapi-test.faas.elenet.me,https://atfcapi-test-beta.faas.elenet.me");
但是设置完以后,并不好用,出现如下错误信息:
Fetch API cannot load https://atfcapi.alpha.elenet.me/atfcapi/project/getProjects. The 'Access-Control-Allow-Origin' header contains multiple values
'https://atfcapi-test.faas.elenet.me,https://atfcapi-test-beta.faas.elenet.me', but only one is allowed. Origin 'https://atfcapi-test.faas.elenet.me' is therefore not allowed access. Have the server send the header with a valid value, or, if an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
设置为以下方式也还是错误:
response.setHeader("Access-Control-Allow-Origin", "https://atfcapi-test.faas.elenet.me");
response.setHeader("Access-Control-Allow-Origin", "https://atfcapi-test-beta.faas.elenet.me");
最后采用了一种和设置为* 的方式一样的办法,代码如下:
@Component
public class CorsFilter implements Filter {
final static org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(CorsFilter.class);
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
HttpServletRequest reqs = (HttpServletRequest) req;
response.setHeader("Access-Control-Allow-Origin",reqs.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", "x-requested-with");
chain.doFilter(req, res);
}
public void init(FilterConfig filterConfig) {}
public void destroy() {}
}
从request 中的header中获取Origin,来做配置,最终成功并满足需求。
其实有些东西还是一知半解,但是起码曲线救国也是一种解决方法。
总结
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