Spring RestTemplate 和代理身份验证

Question

我正在尝试使用 Spring 进行 REST 调用。据我了解，正确的方法是使用

RestTemplate

(?)。问题是，我在代理后面。

这是我现在的代码：

SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
InetSocketAddress address = new InetSocketAddress(host, 3128);
Proxy proxy = new Proxy(Proxy.Type.HTTP, address);
factory.setProxy(proxy);

RestTemplate restTemplate = new RestTemplate();
restTemplate.setRequestFactory(factory);

它似乎有效，但我需要在代理上进行身份验证，但这是如何完成的？

Proxy

类型以及

SimpleClientHttpRequestFactory

类型似乎不处理凭据。没有凭据，我只会得到 407...

Answer 1

经过相当多的不同选择后，我选择了下面的代码，因为能够在创建时为 RestTemplate 设置代理，因此我可以将其重构为单独的方法。 只是要注意它还有一个额外的依赖项，所以请记住这一点。

private RestTemplate createRestTemplate() throws Exception {
    final String username = "myusername";
    final String password = "myPass";
    final String proxyUrl = "proxy.nyc.bigtower.com";
    final int port = 8080;

    CredentialsProvider credsProvider = new BasicCredentialsProvider();
    credsProvider.setCredentials( 
        new AuthScope(proxyUrl, port), 
        new UsernamePasswordCredentials(username, password)
    );

    HttpHost myProxy = new HttpHost(proxyUrl, port);
    HttpClientBuilder clientBuilder = HttpClientBuilder.create();

    clientBuilder.setProxy(myProxy).setDefaultCredentialsProvider(credsProvider).disableCookieManagement();

    HttpClient httpClient = clientBuilder.build();
    HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
    factory.setHttpClient(httpClient);

    return new RestTemplate(factory);
}

//我使用的依赖项。

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.2</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>4.2.5.RELEASE</version>
</dependency>

Answer 2

下面的代码对我有用。

RestTemplate restTemplate = new RestTemplate();

CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials( new AuthScope("proxyHost", "proxyPort"), new UsernamePasswordCredentials("proxyUser", "proxyPass") );
HttpClientBuilder clientBuilder = HttpClientBuilder.create();

clientBuilder.useSystemProperties();
clientBuilder.setProxy(new HttpHost("proxyHost", "proxyPort"));
clientBuilder.setDefaultCredentialsProvider(credsProvider);
clientBuilder.setProxyAuthenticationStrategy(new ProxyAuthenticationStrategy());

CloseableHttpClient client = clientBuilder.build();

HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
factory.setHttpClient(client);

restTemplate.setRequestFactory(factory);

Answer 3

如果您的代理需要基本身份验证，您只需设置 HTTP 标头

Proxy-Authorization

即可处理身份验证：

final SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
final InetSocketAddress address = new InetSocketAddress(host, 3128);
final Proxy proxy = new Proxy(Proxy.Type.HTTP, address);
factory.setProxy(proxy);

final String username = "Aladdin";
final String password = "open sesame";

final RestTemplate restTemplate = new RestTemplateBuilder()
    .requestFactory(() -> factory)
    .defaultHeader(HttpHeaders.PROXY_AUTHORIZATION, "Basic " + Base64.getEncoder().encodeToString((username + ':' + password).getBytes(StandardCharsets.UTF_8)))
    .build();

您不需要为此使用额外的依赖项。

Answer 4

@matthew-fontana 的解决方案效果非常好。然而，就我而言，我将

HttpServiceProxyFactory

与

HttpExchange

一起使用。以下是我改编的版本

httpclient5:5.3.1

.

BasicCredentialsProvider credentialsProvider = new BasicCredentialsProvider();
credentialsProvider.setCredentials(
        new AuthScope(proxyUrl, proxyPort),
        new UsernamePasswordCredentials(proxyUsername, proxyPassword.toCharArray())
);

HttpHost proxy = new HttpHost(proxyUrl, proxyPort);

HttpClient httpClient = HttpClientBuilder
        .create()
        .setProxy(proxy)
        .setDefaultCredentialsProvider(credentialsProvider)
        .disableCookieManagement().build();

HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();
requestFactory.setHttpClient(httpClient);

RestClient restClient = RestClient
        .builder()
        .baseUrl(baseUrl)
        .requestFactory(requestFactory)
        .build();