POST(BodyPublishers.ofString(requestBody)) HttpRequest request = HttpRequest.newBuilder(uri) ObjectMapper objectMapper = new ObjectMapper() public CompletableFuture postJSON(URI uri,
#Java http client how to#
The following example demonstrates how to use the Jackson library, in combination with the BodyPublishers::ofString to convert a Map of String key/value pairs into JSON. The convenience request body handlers can be used, along with a third-party library to convert the request body into that format. In many cases the request body will be in some higher-level format. Alternatively, a streaming subscriber, like ofInputStream could be used. The above example uses ofString which accumulates the response body bytes in memory. Lets dive in for examples and recipes that can be followed to perform common tasks using the Java HTTP Client Synchronous Get Response body as a String public void get(String uri) throws Exception ) The other concepts, like back-pressure and flow-control, has been provided by reactive streams through API. The new API is now providing non-blocking request and response handling by CompletableFutures. Requests sent to servers that do not yet support HTTP/2 will automatically be downgraded to HTTP/1.1. By default the client will send requests using HTTP/2. Prior to Java 11, developers had to use legacy class HttpUrlConnection which is considered to be more abstract or use third-part library such as Apache HttpClient, or OkHttp.įrom JDK11, It supports HTTP/1.1 and HTTP/2, both synchronous and asynchronous programming models, handles request and response bodies as reactive-streams, and follows the familiar builder pattern. * interfaces if you really need that behavior.An HttpClient can be used to access any resource on the web via HTTP.
You could implement the `BeforeEachCallback` and `AfterEachCallback` * I wanted to only run one server per test class and I can register handlers * but not `AfterEachCallback` and `BeforeEachCallback` for performance reasons. * Note: I chose to implement `BeforeAllCallback` and AfterAllCallback You can also see it in this gist import .HttpHandler So I’ve converted that rule into a jUnit5 Extension and here it is: I have found a jUnit4 for such server here. Public class SearchProxyServlet extends SlingSafeMethodsServlet ", context.response().getOutputAsString()) Īll good so far! But what about testing HttpClientService itself? For that, we would need an HTTP server to run before the test class runs and stop right after. ServletResolverConstants.SLING_SERVLET_SELECTORS + "=searchproxy" ServletResolverConstants.SLING_SERVLET_EXTENSIONS + "=json", ServletResolverConstants.SLING_SERVLET_RESOURCE_TYPES + "=" ServletResolverConstants.SLING_SERVLET_METHODS + "=" + HttpConstants.METHOD_GET, Import .servlets.SlingSafeMethodsServlet Ĭonstants.SERVICE_DESCRIPTION + "=Search Proxy servlet",
Import .servlets.ServletResolverConstants
#Java http client code#
VERY dudamentary code to illustrate the point Let’s look at an example servlet that proxies to a hard-coded url. The test code in this post is written with jUnit5, although most of the concepts here apply to jUnit4 as well. If you have not seen my post, The Ultimate Code Quality Setup for your AEM project, you should check it out. If you’ve ever written a proxy servlet in AEM, chances are you’ve used Apache’s HttpComponents library. While a great library, there are not many resources online for how to test it when used inside your code.
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