非标准端口上的HTTP/HTTPS连接可实现灵活的端口出口

非标准端口(非80/443)上的HTTP/HTTPS连接必须在AEMas a Cloud Service之外进行代理,但它们不需要任何特殊 portForwards 规则,并可使用AEM的 AEM_PROXY_HOST 和保留的代理端口 AEM_HTTP_PROXY_PORTAEM_HTTPS_PROXY_PORT 具体取决于目标是HTTP/HTTPS。

高级网络支持

以下高级网络选项支持以下代码示例。

确保 适当 在完成本教程之前,已设置高级网络配置。

无高级网络 灵活的端口出口 专用出口IP地址 虚拟专用网
注意

此代码示例仅适用于 灵活的端口出口. 有一个相似但不同的代码示例可供使用 专用出口IP地址和VPN的非标准端口上的HTTP/HTTPS连接.

代码示例

此Java™代码示例是OSGi服务的一个示例,该服务可以在AEMas a Cloud Service中运行,该服务在8080上与外部Web服务器进行HTTP连接。 与HTTPS Web服务器的连接使用环境变量 AEM_PROXY_HOSTAEM_HTTPS_PROXY_PORT (默认为 proxy.tunnel:3128 (在AEM版本< 6094)中。

注意

建议使用 Java™ 11 HTTP API 用于从AEM发起HTTP/HTTPS调用。

  • 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.
            // The explicit fallback of 3128 will be obsoleted in Jan 2022, and only the AEM_HTTP_PROXY_PORT/AEM_HTTPS_PROXY_PORT variable will be required
            ProxySelector proxySelector = ProxySelector.of(new InetSocketAddress(
                System.getenv().getOrDefault("AEM_PROXY_HOST", "proxy.tunnel"),
                Integer.parseInt(System.getenv().getOrDefault("AEM_HTTP_PROXY_PORT", "3128"))));

            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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