如何使用RestTemplate将POST请求发送到相对URL？

Question

如何POST向应用程序本身发送请求？

如果我只发送一个相对的帖子请求:java.lang.IllegalArgumentException: URI is not absolute.

@RestController
public class TestServlet {
    @RequestMapping("value = "/test", method = RequestMethod.GET)
    public void test() {
        String relativeUrl = "/posting"; //TODO how to generate like "localhost:8080/app/posting"?
        new RestTemplate().postForLocation(relativeUrl, null);
    }
}

所以使用上面的例子,我如何在url前加上绝对服务器url路径localhost:8080/app？我必须动态地找到路径.

Answer 1

您可以像下面一样重写您的方法.

@RequestMapping("value = "/test", method = RequestMethod.GET)
public void test(HttpServletRequest request) {
    String url = request.getRequestURL().toString();
    String relativeUrl = url+"/posting"; 
    new RestTemplate().postForLocation(relativeUrl, null);
}

Answer 2

发现一种基本的方式,基本上使用ServletUriComponentsBuilder以下任务自动化任务:

@RequestMapping("value = "/test", method = RequestMethod.GET)
    public void test(HttpServletRequest req) {
    UriComponents url = ServletUriComponentsBuilder.fromServletMapping(req).path("/posting").build();
        new RestTemplate().postForLocation(url.toString(), null);
    }