我正在尝试将JSON对象发布到我的Spring MVC控制器,但我只收到Access-Control-Allow-Origin
错误。
我的控制器:
@RequestMapping(value= "/add", method = RequestMethod.POST, headers = {"content-type=application/json"})
public @ResponseBody Reponse addUser(Model model, @RequestBody @Valid @ModelAttribute("user") User user, BindingResult result) {
if (result.hasErrors()) {
Reponse error = new Reponse();
// etc......
return error;
} else {
return service.addUser(user);
}
}
我的Zepto POST:
this.addUser = function (valeur, callback) {
$.ajax({
type: 'POST',
url: 'http://127.0.0.1:8080/AgenceVoyage/user/add',
data: JSON.stringify({"mail" : "toto@toto.fr" , "password" : "titi"}),
dataType: "json",
contentType: "application/json",
success: function(data) {
if(data.reponse == "OK") {
window.location = "main.html";
} else {
alert("PROBLEM");
}
},
error: function(xhr, type) {
alert("ERROR");
}
});
};
我尝试在POST请求中没有stringify,@RequestMapping
中没有标题。
我的结果:
选项http://127.0.0.1:8080/AgenceVoyage/user/add没有 请求中存在“Access-Control-Allow-Origin”标头 资源。因此不允许来源“http://localhost:9000” 访问。 zepto.min.js:2 XMLHttpRequest无法加载
答案 0 :(得分:9)
我找到了解决方案:
首先,创建一个新的过滤器,它将设置标题响应:
@Component
public class SimpleCORSFilter implements Filter {
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
response.setHeader("Access-Control-Allow-Origin", "*");
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() {}
}
之后,在您的web.xml中添加以下行:
<filter>
<filter-name>cors</filter-name>
<filter-class>MY.PACKAGE.SimpleCORSFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>cors</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
那一切!
答案 1 :(得分:2)
这是因为页面是从http://localhost:9000
中的服务器加载的,此页面正在尝试通过ajax请求访问另一个域http://127.0.0.1:8080/AgenceVoyage/user/add
。
请注意,不同的端口号使这两个网址对应两个不同的域,即使它们都是本地主机网址也很难。
因为这两者被认为是不同的域,浏览器ajax同源策略启动并阻止请求由于安全原因而被执行(不允许针对第三方域的ajax请求)。
有关ajax Same Origin Policy的详细信息,请参阅此处,特别是原点确定政策部分,其中提到端口号是原点的一部分。
答案 2 :(得分:0)
如果您的应用程序是以编程方式配置的,那么您需要WebApplicationInitializer
实施中的下一个代码,而不是&#39; xml&#39;:
public class WebAppInitializer implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) {
... // your context configuration like in Spring.io tutorial
// Register filter to allow cross-domain requests
registerServletFilter(servletContext, new SimpleCORSFilter());
}
...
protected FilterRegistration.Dynamic registerServletFilter(ServletContext servletContext, Filter filter) {
String filterName = Conventions.getVariableName(filter);
FilterRegistration.Dynamic registration = servletContext.addFilter(filterName, filter);
registration.setAsyncSupported(true);
registration.addMappingForUrlPatterns(EnumSet.allOf(DispatcherType.class), false, "/*");
return registration;
}
}
如果过滤器是
@Component
public class SimpleCORSFilter implements Filter {
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
chain.doFilter(req, res);
}
public void init(FilterConfig filterConfig) {}
public void destroy() {}
}
答案 3 :(得分:0)
在控制器类
中插入此注释@CrossOrigin@CrossOrigin(origin = "http://domain2.com", maxAge = 3600)
@RestController
@RequestMapping("/account")
public class UserController {
}
字体: https://dzone.com/articles/cors-support-spring-framework