我的服务器上的CORS存在很大问题。我的服务器在localhost上的Tomcat上运行。我实现的服务器有几个RestFul资源。 例如:
@Path("user")
public class UserService {
@GET
@Path("/{username}/{password}")
@Produces("text/plain")
public String checkLoginParameter(@PathParam("username") String username, @PathParam("password") String password) {
String tempUserName = "";
String tempPassword = "";
String bool = "";
EntityManager em = createEntityManager();
try{
User user = (User)em.createQuery("SELECT u FROM User u WHERE u.username='"+username+"' AND u.password='"+password+"'").getSingleResult();
tempUserName = user.getUsername();
tempPassword = user.getPassword();
}
catch(Exception e){}
if(username.equals(tempUserName) && !username.isEmpty() && password.equals(tempPassword) && !password.isEmpty()){
bool = "true";
}
else{
bool = "false";
}
return bool;
}
}
Ressource正在运作。 现在我想从其他网站通过JavaScript访问Ressource。当我尝试这样做时,我收到一条错误消息:
XMLHttpRequest cannot load http://localhost:8080/RSAppStore/user/poc/poc. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.
我知道我已经为我的服务器添加了CORS权限。 我是这样做的:
的web.xml:
<filter>
<filter-name>CORS</filter-name>
<filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
<init-param>
<param-name>cors.allowOrigin</param-name>
<param-value>*</param-value>
</init-param>
<init-param>
<param-name>cors.supportedMethods</param-name>
<param-value>GET, POST, HEAD, PUT, DELETE</param-value>
</init-param>
<init-param>
<param-name>cors.supportedHeaders</param-name>
<param-value>*</param-value>
</init-param>
<init-param>
<param-name>cors.exposedHeaders</param-name>
<param-value>Set-Cookie</param-value>
</init-param>
<init-param>
<param-name>cors.supportsCredentials</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CORS</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
使用JavaScript访问:
<script type="text/javascript">
$(function(){
$.ajax({
type: "GET",
crossDomain: true,
url: "http://robosmart-appstore:robosmart@localhost:8080/RSAppStore/user/poc/poc",
contentType: "text/plain",
success: function( string ) {
console.log(string);
},
error:function () {
console.log("err");
}
});
});
</script>
此外,我已经添加了这两个罐子。
cors-filter-1.9.2.jar
java-property-utils-1.9.jar
我在互联网上阅读了很多例子和解释,但似乎没有任何作用,我也不知道自己做错了什么。
答案 0 :(得分:3)
我只是成功通过tomcat和angular.js传递CORS。
您可能需要配置一些内容:
将 cors.supportedHeaders 更改为:
<init-param>
<param-name>cors.supportedHeaders</param-name>
<param-value>Accept, Origin, X-Requested-With, Content-Type, Last-Modified</param-value>
</init-param>
确保您的过滤器位于任何其他过滤器之前。
尝试将 contentType 更改为:
contentType: "application/x-www-form-urlencoded; charset=utf-8"
试试吧。