跨域問題,其實百度上面有一堆的解決方案
針對普通的情況其實百度上面的方案都是可行的。
我這里主要介紹2種情況。
當然我這里的配置都是基于網關的,而不是基于服務的。
1、沒有增加權限驗證。
2、增加了spring security的權限驗證(我這里是基于keyCloak),增加了Authorization
首先我們介紹第一種情況的解決方法,這個很簡單,只需要在啟動類里面配置過濾器就可以解決。
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
@Bean public CorsFilter corsFilter() { //1.添加CORS配置信息 CorsConfiguration config = new CorsConfiguration(); //放行哪些原始域 config.addAllowedOrigin( "*" ); //是否發送Cookie信息 config.setAllowCredentials( true ); //放行哪些原始域(請求方式) config.addAllowedMethod( "*" ); //放行哪些原始域(頭部信息) config.addAllowedHeader( "*" ); //暴露哪些頭部信息(因為跨域訪問默認不能獲取全部頭部信息) config.addExposedHeader( "*" ); //2.添加映射路徑 UrlBasedCorsConfigurationSource configSource = new UrlBasedCorsConfigurationSource(); configSource.registerCorsConfiguration( "/**" , config); //3.返回新的CorsFilter. return new CorsFilter(configSource); } |
我遇到情況就是第二種了,這種情況上面的方式基本沒有作用,我這里使用的是keyCloak做的權限驗證。
首先增加過濾器配置:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
@Component public class CorsControllerFilter implements Filter{ @Override public void destroy() { // TODO Auto-generated method stub } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { // TODO Auto-generated method stub HttpServletResponse res = (HttpServletResponse) response; res.setContentType( "text/html;charset=UTF-8" ); res.setHeader( "Access-Control-Allow-Origin" , "*" ); res.setHeader( "Access-Control-Allow-Methods" , "POST, GET, OPTIONS, DELETE ,PUT" ); res.setHeader( "Access-Control-Max-Age" , "3600" ); res.setHeader( "Access-Control-Allow-Headers" , "*" ); res.setHeader( "Access-Control-Allow-Credentials" , "true" ); res.setHeader( "XDomainRequestAllowed" , "1" ); chain.doFilter(request, response); } @Override public void init(FilterConfig arg0) throws ServletException { // TODO Auto-generated method stub } } |
在啟動類中增加配置
1
2
3
4
5
6
7
|
@Bean public FilterRegistrationBean filterRegistrationBean() { FilterRegistrationBean registrationBean = new FilterRegistrationBean(); CorsControllerFilter corsControllerFilter = new CorsControllerFilter(); registrationBean.setFilter(corsControllerFilter); return registrationBean; } |
但是針對某些請求,他會先請求OPTIONS請求,造成權限驗證失敗。所以增加攔截器配置,對所有的OPTIONS的請求直接放行,返回200的狀態。
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
public class OptionsInterceptor implements HandlerInterceptor { @Override public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3) throws Exception { // TODO Auto-generated method stub } @Override public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3) throws Exception { // TODO Auto-generated method stub } @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { // TODO Auto-generated method stub if (request.getMethod().equals( "OPTIONS" )){ response.setStatus(HttpServletResponse.SC_OK); return false ; } return true ; } } |
配置web配置文件,加載攔截器。
1
2
3
4
5
6
7
|
@Configuration public class WebMvcConfiguration extends WebMvcConfigurationSupport{ @Override public void addInterceptors(InterceptorRegistry registry) { registry.addInterceptor( new OptionsInterceptor()).addPathPatterns( "/**" ); } } |
本來以為這樣配置了應該是可以了,但是在請求的時候OPTIONS的請求居然還是報跨域的問題,增加攔截器允許跨域配置
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
public class CrossInterceptor implements HandlerInterceptor{ @Override public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3) throws Exception { // TODO Auto-generated method stub } @Override public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3) throws Exception { // TODO Auto-generated method stub } @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { // TODO Auto-generated method stub response.setHeader( "Access-Control-Allow-Origin" , "*" ); response.setHeader( "Access-Control-Allow-Credentials" , "true" ); response.setHeader( "Access-Control-Allow-Methods" , "POST, GET, OPTIONS, DELETE, PUT, HEAD" ); response.setHeader( "Access-Control-Allow-Headers" , "*" ); response.setHeader( "Access-Control-Max-Age" , "3600" ); return true ; } } |
在WebMvcConfiguration里面增加配置,注意要寫在OptionsInterceptor的前面
1
|
registry.addInterceptor( new CrossInterceptor()).addPathPatterns( "/**" ); |
繼續測試,跨域問題解決。對于原理其實我也不太清楚,歡迎各位溝通交流。
以上為個人經驗,希望能給大家一個參考,也希望大家多多支持服務器之家。
原文鏈接:https://blog.csdn.net/zhuwei_clark/article/details/83413763