非標準連線埠上的HTTP/HTTPS連線,用於靈活的連線埠輸出

非標準連線埠(非80/443)上的HTTP/HTTPS連線必須以AEMas a Cloud Service代理,但是它們不需要任何特殊 portForwards 規則,並可使用AEM進階網路的 AEM_PROXY_HOST 和保留的代理主機連線埠 AEM_HTTP_PROXY_PORTAEM_HTTPS_PROXY_PORT 視目的地為HTTP/HTTPS而定。

進階網路支援

下列進階網路選項支援下列程式碼範例。

確保 適當 在學習本教學課程之前,已設定進階網路設定。

CAUTION
此程式碼範例僅適用於 彈性連線埠輸出. 類似但不同的程式碼範例適用於 專用輸出IP位址和VPN的非標準連線埠上的HTTP/HTTPS連線.

程式碼範例

此Java™程式碼範例屬於OSGi服務,可在AEMas a Cloud Service中執行,與8080上的外部網頁伺服器建立HTTP連線。 與HTTPS網頁伺服器的連線使用環境變數 AEM_PROXY_HOSTAEM_HTTPS_PROXY_PORT (預設為 proxy.tunnel:3128 (在AEM版本< 6094中)。

NOTE
建議使用 Java™ 11 HTTP API 用於從AEM進行HTTP/HTTPS呼叫。
  • core/src/com/adobe/aem/wknd/examples/connections/impl/HttpExternalServiceImpl.java
package com.adobe.aem.wknd.examples.core.connections.impl;

import com.adobe.aem.wknd.examples.core.connections.ExternalService;
import org.osgi.service.component.annotations.Component;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ProxySelector;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.time.Duration;

@Component
public class HttpExternalServiceImpl implements ExternalService {
    private static final Logger log = LoggerFactory.getLogger(HttpExternalServiceImpl.class);

    @Override
    public boolean isAccessible() {
        HttpClient client;

        // Use System.getenv("AEM_PROXY_HOST") and proxy port System.getenv("AEM_HTTP_PROXY_PORT")
        // or System.getenv("AEM_HTTPS_PROXY_PORT"), depending on if the destination requires HTTP/HTTPS

        if (System.getenv("AEM_PROXY_HOST") != null) {
            // Create a ProxySelector that uses to AEM's provided AEM_PROXY_HOST, with a fallback of proxy.tunnel, and proxy port using the AEM_HTTP_PROXY_PORT variable.
            // If the destination requires HTTPS, then use the variable AEM_HTTPS_PROXY_PORT instead of AEM_HTTP_PROXY_PORT.

            ProxySelector proxySelector = ProxySelector.of(new InetSocketAddress(
                System.getenv().getOrDefault("AEM_PROXY_HOST", "proxy.tunnel"),
                Integer.parseInt(System.getenv().get("AEM_HTTP_PROXY_PORT"))));

            client = HttpClient.newBuilder().proxy(proxySelector).build();
            log.debug("Using HTTPClient with AEM_PROXY_HOST");
        } else {
            client = HttpClient.newBuilder().build();
            // If no proxy is set up (such as local dev)
            log.debug("Using HTTPClient without AEM_PROXY_HOST");
        }

        // Prepare the full URI to request, note this will have the
        // - Scheme (http/https)
        // - External host name
        // - External port
        // The external service URI, including the scheme/host/port, is defined in code, and NOT in Cloud Manager portForwards rules.
        URI uri = URI.create("http://api.example.com:8080/test.json");

        // Prepare the HttpRequest
        HttpRequest request = HttpRequest.newBuilder().uri(uri).timeout(Duration.ofSeconds(2)).build();

        // Send the HttpRequest using the configured HttpClient
        HttpResponse<String> response = null;
        try {
            // Request the URL
            response = client.send(request, HttpResponse.BodyHandlers.ofString());

            log.debug("HTTP response body: {} ", response.body());

            // Our simple example returns true is response is successful! (200 status code)
            return response.statusCode() == 200;
        } catch (IOException e) {
            return false;
        } catch (InterruptedException e) {
            return false;
        }
    }
}
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