简介
跨域我就不多说了，我们今天开门见山直接解决跨域的几种姿势，那就上姿势
姿势
姿势一
实现WebMvcConfigurer#addCorsMappings的方法
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class CorsConfig implements WebMvcConfigurer {
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowedOrigins("*")
.allowedMethods("GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS")
.allowCredentials(true)
.maxAge(3600)
.allowedHeaders("*");
}
}
姿势二
重新注入CorsFilter
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
/**
* 解决跨域
*/
@Configuration
public class CorsFilterConfig {
/**
* 开启跨域访问拦截器
*
* @date 2021/4/29 9:50
*/
@Bean
public CorsFilter corsFilter() {
//创建CorsConfiguration对象后添加配置
CorsConfiguration corsConfiguration = new CorsConfiguration();
//设置放行哪些原始域
corsConfiguration.addAllowedOrigin("*");
//放行哪些原始请求头部信息
corsConfiguration.addAllowedHeader("*");
//放行哪些请求方式
corsConfiguration.addAllowedMethod("*");
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
//2. 添加映射路径
source.registerCorsConfiguration("/**", corsConfiguration);
return new CorsFilter(source);
}
}
姿势三
创建一个filter解决跨域
@Slf4j
@Component
@WebFilter(urlPatterns = { "/*" }, filterName = "headerFilter")
public class HeaderFilter implements Filter {
@Override
public void doFilter(ServletRequest request, ServletResponse resp, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) resp;
//解决跨域访问报错
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "POST, PUT, GET, OPTIONS, DELETE");
//设置过期时间
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, client_id, uuid, Authorization");
// 支持HTTP 1.1.
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
// 支持HTTP 1.0. response.setHeader("Expires", "0");
response.setHeader("Pragma", "no-cache");
// 编码
response.setCharacterEncoding("UTF-8");
chain.doFilter(request, resp);
}
@Override
public void init(FilterConfig filterConfig) {
log.info("跨域过滤器启动");
}
@Override
public void destroy() {
log.info("跨域过滤器销毁");
}
}
姿势四
使用CrossOrigin 注解
可以使用在单个方法上也可以使用在类上
Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface CrossOrigin {
/** @deprecated as of Spring 5.0, in favor of {@link CorsConfiguration#applyPermitDefaultValues} */
@Deprecated
String[] DEFAULT_ORIGINS = {"*"};
/** @deprecated as of Spring 5.0, in favor of {@link CorsConfiguration#applyPermitDefaultValues} */
@Deprecated
String[] DEFAULT_ALLOWED_HEADERS = {"*"};
/** @deprecated as of Spring 5.0, in favor of {@link CorsConfiguration#applyPermitDefaultValues} */
@Deprecated
boolean DEFAULT_ALLOW_CREDENTIALS = false;
/** @deprecated as of Spring 5.0, in favor of {@link CorsConfiguration#applyPermitDefaultValues} */
@Deprecated
long DEFAULT_MAX_AGE = 1800;
/**
* Alias for {@link #origins}.
*/
@AliasFor("origins")
String[] value() default {};
/**
* A list of origins for which cross-origin requests are allowed. Please,
* see {@link CorsConfiguration#setAllowedOrigins(List)} for details.
* <p>By default all origins are allowed unless {@code originPatterns} is
* also set in which case {@code originPatterns} is used instead.
*/
@AliasFor("value")
String[] origins() default {};
/**
* Alternative to {@link #origins()} that supports origins declared via
* wildcard patterns. Please, see
* @link CorsConfiguration#setAllowedOriginPatterns(List)} for details.
* <p>By default this is not set.
* @since 5.3
*/
String[] originPatterns() default {};
/**
* The list of request headers that are permitted in actual requests,
* possibly {@code "*"} to allow all headers.
* <p>Allowed headers are listed in the {@code Access-Control-Allow-Headers}
* response header of preflight requests.
* <p>A header name is not required to be listed if it is one of:
* {@code Cache-Control}, {@code Content-Language}, {@code Expires},
* {@code Last-Modified}, or {@code Pragma} as per the CORS spec.
* <p>By default all requested headers are allowed.
*/
String[] allowedHeaders() default {};
/**
* The List of response headers that the user-agent will allow the client
* to access on an actual response, other than "simple" headers, i.e.
* {@code Cache-Control}, {@code Content-Language}, {@code Content-Type},
* {@code Expires}, {@code Last-Modified}, or {@code Pragma},
* <p>Exposed headers are listed in the {@code Access-Control-Expose-Headers}
* response header of actual CORS requests.
* <p>The special value {@code "*"} allows all headers to be exposed for
* non-credentialed requests.
* <p>By default no headers are listed as exposed.
*/
String[] exposedHeaders() default {};
/**
* The list of supported HTTP request methods.
* <p>By default the supported methods are the same as the ones to which a
* controller method is mapped.
*/
RequestMethod[] methods() default {};
/**
* Whether the browser should send credentials, such as cookies along with
* cross domain requests, to the annotated endpoint. The configured value is
* set on the {@code Access-Control-Allow-Credentials} response header of
* preflight requests.
* <p><strong>NOTE:</strong> Be aware that this option establishes a high
* level of trust with the configured domains and also increases the surface
* attack of the web application by exposing sensitive user-specific
* information such as cookies and CSRF tokens.
* <p>By default this is not set in which case the
* {@code Access-Control-Allow-Credentials} header is also not set and
* credentials are therefore not allowed.
*/
String allowCredentials() default "";
/**
* The maximum age (in seconds) of the cache duration for preflight responses.
* <p>This property controls the value of the {@code Access-Control-Max-Age}
* response header of preflight requests.
* <p>Setting this to a reasonable value can reduce the number of preflight
* request/response interactions required by the browser.
* A negative value means <em>undefined</em>.
* <p>By default this is set to {@code 1800} seconds (30 minutes).
*/
long maxAge() default -1;
以上四种姿势都学会了么？学会了三连哦
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