Spring RestTemplate使用cookie重定向 [英] Spring RestTemplate follow redirect with cookie

问题描述

最近我遇到了一个问题，我需要对远程服务执行 GET 请求（使用我假设的简单servlet），RestTemplate返回重定向太多了！。

Recently I ran into a problem where I needed to do a GET request to a remote service (Using a simple servlet i presume), and RestTemplate returned Too many redirects!.

经过一番调查，似乎第一次向指定的远程服务发出请求，实际上只是一个302-使用一些 Set-Cookie 标题重定向（自身）。如果我使用的是普通浏览器，它会确认标题，正确设置Cookie，并按照重定向进行正常的200响应。

After some investigation, it seems like the first request made to the specified remote service, is actually just a 302-redirect (to itself) with some Set-Cookie headers. If I were using a "normal" browser, it would acknowledge the header, set the cookies correctly, and follow the redirect where it should meet a normal 200 response.

什么我发现RestTemplate不接受 Set-Cookie 标题，因此重定向会一遍又一遍地进行。

What I've found is that RestTemplate doesn't accept the Set-Cookie header, so the redirect gets made over and over again.

有没有办法让RestTemplate只为当前请求确认 Set-Cookie 标题？我最好不要让它保持状态，因为RestTemplate也用于系统的其他部分。

Is there any way to make RestTemplate acknowledge the Set-Cookie header, for the current request only? I preferably don't want it to hold state, as the RestTemplate is used from other parts of the system as well.

问候

推荐答案

Spring默认请求工厂（ SimpleClientHttpRequestFactory ）不处理cookie。将其替换为具有Apache HttpClient 的请求工厂，该工厂可以使用cookie：

Spring default request factory (SimpleClientHttpRequestFactory) does not handle cookies. Replace it with a request factory with Apache HttpClient which is capable of cookies:

import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

CloseableHttpClient httpClient = HttpClientBuilder
    .create()
    .build();
HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory(httpClient);
RestTemplate restTemplate = new RestTemplate(factory);

这篇关于Spring RestTemplate使用cookie重定向的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！