72.1 Configure RestTemplate to use a proxy
As described in Section 33.1, “RestTemplate customization”, a RestTemplateCustomizer
can be used with RestTemplateBuilder
to build a customized RestTemplate
. This is the recommended approach for creating a RestTemplate
configured to use a proxy.
The exact details of the proxy configuration depend on the underlying client request factory that is being used. Here’s an example of configuring HttpComponentsClientRequestFactory
with an HttpClient
that uses a proxy for all hosts except 192.168.0.5
.
static class ProxyCustomizer implements RestTemplateCustomizer { _@Override_ public void customize(RestTemplate restTemplate) { HttpHost proxy = new HttpHost("proxy.example.com"); HttpClient httpClient = HttpClientBuilder.create() .setRoutePlanner(new DefaultProxyRoutePlanner(proxy) { _@Override_ public HttpHost determineProxy(HttpHost target, HttpRequest request, HttpContext context) throws HttpException { if (target.getHostName().equals("192.168.0.5")) { return null; } return super.determineProxy(target, request, context); } }).build(); restTemplate.setRequestFactory( new HttpComponentsClientHttpRequestFactory(httpClient)); } }