将Access-Control-Allow-Origin添加到Web服务 [英] Add Access-Control-Allow-Origin to Web Service

问题描述

我有一个网络服务，如：

  @Controller 
 @RequestMapping（/）
 public class ApplicationController {
 
 @RequestMapping（value =/ Changes，method = RequestMethod.GET）
 public String inspect（ModelMap model）{
 model.addAttribute ，example）; 
 
 returnindex; 
} 
} 
  

localhost：8081 / ChangesPDF / Changes？...

我试图通过Alfresco得到这个webservice的响应，链接：localhost：8080 / share。我现在有不同的港口（当我有相同的港口，这工作很好），所以，与不同的港口我得到的错误在Alfresco：

跨原始请求已阻止：同源策略不允许读取
远程资源，地址为： http：// localhost： 8081 / ChangesPDF / Changes ？...（原因：标题CORS'Access-Control-Allow-Origin'缺失）。

如何添加此标头？

解决方案

您应该添加一个过滤器，原始接受域localhost：8081（*为所有）。

很可能你会在这里找到你的答案 cores-filter-not-working

p>

首先创建过滤器类

  public class CorsFilter implements Filter {
 
 private static final Logger log = Logger.getAnonymousLogger（）; 
 
 @Override 
 public void init（FilterConfig filterConfig）throws ServletException {} 
 
 @Override 
 public void doFilter（ServletRequest servletRequest，ServletResponse servletResponse，FilterChain filterChain）throws IOException，ServletException {
 HttpServletResponse response =（HttpServletResponse）servletResponse; 
 HttpServletRequest request =（HttpServletRequest）servletRequest; 
 
 //可以移动到属性
 String [] allowDomain = {localhost：8080，localhost：8081}; 
 
 
 String originHeader = request.getHeader（host）; 
 
 for（String domian：allowDomain）{
 
 if（originHeader.endsWith（domian））
 
 response.setHeader（Access- Allow-Origin，originHeader）; 
 break; 
} 
 filterChain.doFilter（servletRequest，servletResponse）; 
 
} 
 
 @Override 
 public void destroy（）{} 
} 
  

向web.xml类添加映射

 < filter& 
< filter-name> cors< / filter-name> 
< filter-class>此处的过滤器类的全名< / filter-class> 
< / filter> 
 
< filter-mapping> 
< filter-name> cors< / filter-name> 
< url-pattern> / *< / url-pattern> 
< / filter-mapping> 
  

您应该根据您的要求在web.xml配置中定义URL pattren

I have a webservice like:

@Controller
@RequestMapping("/")
public class ApplicationController {

    @RequestMapping(value="/Changes", method = RequestMethod.GET)
    public String inspect(ModelMap model) {
         model.addAttribute("msg", "example");

         return "index";
    }
}

in the link: "localhost:8081/ChangesPDF/Changes?..."

I'm trying to get the response of this webservice through Alfresco that is in the link: "localhost:8080/share". I have different ports now (when I have same ports, this works good), so, with different ports I get the error in Alfresco:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://localhost:8081/ChangesPDF/Changes?... (Reason: Header CORS 'Access-Control-Allow-Origin' missing).

How can I add this header?

解决方案

You should add a filter that sets the "Access-Control-Allow-Origin" to accepts domain "localhost:8081" (* for all).

Most probably you will find your answer here cores-filter-not-working

More explanation:

Create a filter class first

public class CorsFilter implements Filter {

    private static final Logger log = Logger.getAnonymousLogger();

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {}

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        HttpServletRequest request = (HttpServletRequest) servletRequest;

        // can be moved to properties
        String[] allowDomain = {"localhost:8080","localhost:8081"};              


        String originHeader = request.getHeader("host");

        for(String domian : allowDomain){

            if(originHeader.endsWith(domian))

            response.setHeader("Access-Control-Allow-Origin", originHeader);
            break;
        }
        filterChain.doFilter(servletRequest, servletResponse);

    }

    @Override
    public void destroy() {}
}

Add mapping to your web.xml class

<filter>
    <filter-name>cors</filter-name>
    <filter-class>full name of your filter class here</filter-class>
</filter>

<filter-mapping>
    <filter-name>cors</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

you should correclty define the URL pattren in web.xml config according to your requirnment

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