The previous answers are not wrong, but they don’t go into the depth that I like to see. There are cases when dealing with low level InputStream is not only desirable, but necessary, the most common example being streaming a large file from source (some web server) to destination (a database). If you try to … Read more
Errors you’ll see if a RestTemplate isn’t defined Consider defining a bean of type ‘org.springframework.web.client.RestTemplate’ in your configuration. or No qualifying bean of type [org.springframework.web.client.RestTemplate] found How to define a RestTemplate via annotations Depending on which technologies you’re using and what versions will influence how you define a RestTemplate in your @Configuration class. Spring >= … Read more
I wish I still had a link to the source that lead me in this direction, but this is the code that ended up working for me. By looking over the JavaDoc for X509TrustManager it looks like the way the TrustManagers work is by returning nothing on successful validation, otherwise throwing an exception. Thus, with … Read more
KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType()); keyStore.load(new FileInputStream(new File(keyStoreFile)), keyStorePassword.toCharArray()); SSLConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory( new SSLContextBuilder() .loadTrustMaterial(null, new TrustSelfSignedStrategy()) .loadKeyMaterial(keyStore, keyStorePassword.toCharArray()) .build(), NoopHostnameVerifier.INSTANCE); HttpClient httpClient = HttpClients.custom().setSSLSocketFactory( socketFactory).build(); ClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory( httpClient); RestTemplate restTemplate = new RestTemplate(requestFactory); MyRecord record = restTemplate.getForObject(uri, MyRecord.class); LOG.debug(record.toString());
@Bean public RestTemplate restTemplate() throws KeyStoreException, NoSuchAlgorithmException, KeyManagementException { TrustStrategy acceptingTrustStrategy = (X509Certificate[] chain, String authType) -> true; SSLContext sslContext = org.apache.http.ssl.SSLContexts.custom() .loadTrustMaterial(null, acceptingTrustStrategy) .build(); SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext); CloseableHttpClient httpClient = HttpClients.custom() .setSSLSocketFactory(csf) .build(); HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory(); requestFactory.setHttpClient(httpClient); RestTemplate restTemplate = new RestTemplate(requestFactory); return restTemplate; }
You can mirror/proxy all requests with this: private String server = “localhost”; private int port = 8080; @RequestMapping(“/**”) @ResponseBody public String mirrorRest(@RequestBody String body, HttpMethod method, HttpServletRequest request) throws URISyntaxException { URI uri = new URI(“http”, null, server, port, request.getRequestURI(), request.getQueryString(), null); ResponseEntity<String> responseEntity = restTemplate.exchange(uri, method, new HttpEntity<String>(body), String.class); return responseEntity.getBody(); } This will … Read more
The POST method should be sent along the HTTP request object. And the request may contain either of HTTP header or HTTP body or both. Hence let’s create an HTTP entity and send the headers and parameter in body. HttpHeaders headers = new HttpHeaders(); headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED); MultiValueMap<String, String> map= new LinkedMultiValueMap<String, String>(); map.add(“email”, “first.last@example.com”); HttpEntity<MultiValueMap<String, String>> … Read more
Here is how I do it. Based on hints from this Spring Jira issue. RestTemplate restTemplate // = …; // Optional Accept header RequestCallback requestCallback = request -> request.getHeaders() .setAccept(Arrays.asList(MediaType.APPLICATION_OCTET_STREAM, MediaType.ALL)); // Streams the response instead of loading it all in memory ResponseExtractor<Void> responseExtractor = response -> { // Here I write the response to … Read more
No, it is not a bug. It is a result of how the ParameterizedTypeReference hack works. If you look at its implementation, it uses Class#getGenericSuperclass() which states Returns the Type representing the direct superclass of the entity (class, interface, primitive type or void) represented by this Class. If the superclass is a parameterized type, the … Read more
When migrating from Spring Boot 1.x to 2.0, changed the code reading the Rest API response as import com.fasterxml.jackson.annotation.JsonCreator; import com.fasterxml.jackson.annotation.JsonProperty; import com.fasterxml.jackson.databind.JsonNode; import org.springframework.data.domain.PageImpl; import org.springframework.data.domain.PageRequest; import org.springframework.data.domain.Pageable; import java.util.ArrayList; import java.util.List; public class RestPageImpl<T> extends PageImpl<T>{ @JsonCreator(mode = JsonCreator.Mode.PROPERTIES) public RestPageImpl(@JsonProperty(“content”) List<T> content, @JsonProperty(“number”) int number, @JsonProperty(“size”) int size, @JsonProperty(“totalElements”) Long totalElements, @JsonProperty(“pageable”) … Read more