Question

我想用http GET调用RestTemplate并检索状态代码和重定向的url（如果有的话）。

如何实现？

Answer 1

使用自定义HttpClient创建Apache RedirectStrategy，您可以在重定向时拦截中间响应。
将默认请求工厂替换为HttpComponentsClientHttpRequestFactory和新的Apache HttpClient。

有关详细信息，请查看org.apache.http.client.RedirectStrategy。或者重复DefaultRedirectStrategy，如以下示例所示：

CloseableHttpClient httpClient = HttpClientBuilder
        .create()
        .setRedirectStrategy( new DefaultRedirectStrategy() {

            @Override
            public boolean isRedirected(HttpRequest request, HttpResponse response,
                    HttpContext context) throws ProtocolException {

                System.out.println(response);

                // If redirect intercept intermediate response.
                if (super.isRedirected(request, response, context)){
                    int statusCode  = response.getStatusLine().getStatusCode();
                    String redirectURL = response.getFirstHeader("Location").getValue();
                    System.out.println("redirectURL: " + redirectURL);
                    return true;
                }
                return false;
            }
        })
        .build();
HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory(httpClient);
RestTemplate restTemplate = new RestTemplate(factory);
.......

Answer 2

var responseEntity = restTemplate.exchange("someurl", HttpMethod.GET, null, Object.class);
HttpHeaders headers = responseEntity.getHeaders();
URI location = headers.getLocation();
location.toString();

Answer 3

使用Spring并覆盖SimpleClientHttpRequestFactory中的prepareConnection（）...

RedirectMatch 301 "^/$" "/FormTest/register/"
RedirectMatch 301 "^/index\.html$" "/FormTest/register/"
RedirectMatch 301 "^/index\.php$" "/FormTest/register/"

如何从RestTemplate获取重定向的URL？

3 个答案: