Http2Client communicate with third party server

[HarryXQ]

How Http2Client communicate to third party server Url:

"https://api.weixin.qq.com/sns/jscode2session?appid=AppID&secret=AppSecret"&js_code=Code&grant_type=authorization_code"

and get the response body.

[HarryXQ]

My Code:

ClientConnection connect = null;
try {
String code = requestEntity.getPathParameters().get("code").getFirst();
URL url = new URL("https://api.weixin.qq.com/sns/jscode2session?appid="+AppID+"&secret="+AppSecret+"&js_code="+code+"&grant_type=authorization_code");

        Http2Client instance = Http2Client.getInstance();
        connect = instance.connect(url.toURI(), Http2Client.WORKER, Http2Client.BUFFER_POOL, OptionMap.create(UndertowOptions.ENABLE_HTTP2, true)).get();

        final CountDownLatch latch = new CountDownLatch(1);
        final AtomicReference<ClientResponse> reference = new AtomicReference<>();
        ClientRequest request = new ClientRequest().setMethod(Methods.GET).setPath(url.getPath());
        request.getRequestHeaders().add(new HttpString("appid"), AppID);
        request.getRequestHeaders().add(new HttpString("secret"), AppSecret);
        request.getRequestHeaders().add(new HttpString("js_code"), code);
        request.getRequestHeaders().add(new HttpString("grant_type"), "authorization_code");
        request.getRequestHeaders().put(Headers.HOST, "localhost");
        connect.sendRequest(request, instance.createClientCallback(reference, latch));
        latch.await(1000, TimeUnit.MILLISECONDS);

        int statusCode = reference.get().getResponseCode();
        if (statusCode >= 300) {
            throw new Exception("Failed to call API jscode2session: " + statusCode);
        }
        String jsObj = Config.getInstance().getMapper().readValue(reference.get().getAttachment(Http2Client.RESPONSE_BODY), new TypeReference<>() {});

        HeaderMap responseHeaders = new HeaderMap();
        responseHeaders.add(Headers.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);
        return new ResponseEntity<>(jsObj, responseHeaders, HttpStatus.OK);
    } catch (Exception e) {
        Helper.loggerError(e.getMessage());
    } finally {
        IoUtils.safeClose(connect);
    }

Log: Cannot invoke "io.undertow.client.ClientResponse.getResponseCode()" because the return value of "java.util.concurrent.atomic.AtomicReference.get()" is null

[stevehu]

You might need to increase the timeout when connecting to a third-party server. Also, you have to add the third-party server certificate to the client.truststore since you are using HTTPS.

latch.await(1000, TimeUnit.MILLISECONDS);