Apache HttpClient 4.5 重定向 POST 请求到 GET 请求

Question

我正在尝试访问 post 端点，但出现错误 302，当我在同一台服务器上尝试另一个 get Url 时，它给了我 200。然后我重定向了 post 使用 LaxRedirectStrategy() 的请求 post 请求正在重定向到 get 请求（相同的端点只有方法名称是 GET 和 POST）它没有从 post 方法获得响应。谁能告诉我如何使用 apahce httpClient 4.5

将 post 请求重定向到 post 请求

HttpClient client= HttpClientBuilder.create()
 .setRedirectStrategy(new LaxRedirectStrategy()).build();
HttpPost post = new HttpPost("url");
post.addHeader("content-type", " application/json");
HttpResponse response = client.execute(post);

Answer 1

我遇到了同样的问题，我通过使用 LaxRedirectStrategy 和覆盖的 getRedirect 方法解决了它。

显然，当初始重定向响应不同于 307 或 308 时，POST 请求的默认行为是将重定向调用作为 GET 请求。

见： DefaultRedirectStrategy LaxRedirectStrategy 继承自。

在我的例子中，重定向响应代码是 302。

因此，如果您想要不同的东西，您可以覆盖 getRedirect 方法并提供您自己的实现。

类似于：

new LaxRedirectStrategy() {
        @Override
        public HttpUriRequest getRedirect(HttpRequest request, HttpResponse response, HttpContext context) throws ProtocolException {
            final URI uri = getLocationURI(request, response, context);
            final String method = request.getRequestLine().getMethod();
            if (method.equalsIgnoreCase(HttpHead.METHOD_NAME)) {
                return new HttpHead(uri);
            } else if (method.equalsIgnoreCase(HttpGet.METHOD_NAME)) {
                return new HttpGet(uri);
            } else {
                final int status = response.getStatusLine().getStatusCode();
                if (status == HttpStatus.SC_TEMPORARY_REDIRECT || status == HttpStatus.SC_MOVED_TEMPORARILY) { //HttpStatus.SC_MOVED_TEMPORARILY == 302
                    return RequestBuilder.copy(request).setUri(uri).build();
                } else {
                    return new HttpGet(uri);
                }
            }
        }
    }

Answer 2

    HttpClient httpClient =
        HttpClients.custom().setRedirectStrategy(new LaxRedirectStrategy() {

            /*
             * (non-Javadoc)
             * 
             * @see org.apache.http.impl.client.DefaultRedirectStrategy#
             * getRedirect(org.apache.http.HttpRequest,
             * org.apache.http.HttpResponse,
             * org.apache.http.protocol.HttpContext)
             */
            @Override
            public HttpUriRequest getRedirect(
                HttpRequest request, HttpResponse response,
                HttpContext context) throws ProtocolException
        {

                final URI uri = getLocationURI(request, response, context);
                final String method = request.getRequestLine().getMethod();
                if (method.equalsIgnoreCase(HttpPost.METHOD_NAME)) {

                    HttpPost post = new HttpPost(uri);
                    post.setEntity(entity);
                    return post;
                } else if (method.equalsIgnoreCase(HttpHead.METHOD_NAME)) {
                    return new HttpHead(uri);
                } else if (method.equalsIgnoreCase(HttpGet.METHOD_NAME)) {
                    return new HttpGet(uri);
                } else {
                    final int status =
                        response.getStatusLine().getStatusCode();
                    return status == HttpStatus.SC_TEMPORARY_REDIRECT
                        ? RequestBuilder.copy(request).setUri(uri).build()
                        : new HttpGet(uri);
                }
            }

        })

Apache HttpClient 4.5 重定向 POST 请求到 GET 请求

Apache HttpClient 4.5 redirect POST request to GET request

java

apache-httpclient-4.x

spring-boot