API调用 示例代码修改调用环境信息后可直接调用。以下以新建工程为例，介绍如何在您的应用中调用SDK进行请求签名。 把API信息替换到HttpClientDemo.java中对应位置。 本示例以AK和SK保存在环境变量中为例，运行本示例前请先在本地环境中设置环境变量HUAWEICLOUD_SDK_AK和HUAWEICLOUD_SDK_SK。以Linux系统为例在本地将已获取的AK/SK设置为环境变量。 打开终端，输入以下命令打开环境变量配置文件。 vi ~/.bashrc 设置环境变量，保存文件并退出编辑器。 export HUAWEICLOUD_SDK_AK="已获取AK值" export HUAWEICLOUD_SDK_SK="已获取SK值" 输入以下命令使配置文件生效。 source ~/.bashrc 把API信息和已设置的环境变量替换到HttpClientDemo.java中对应位置。 HttpClientDemo中引用以下类，可在“获取SDK”包中的“src”文件下查看： Constant：demo中用到的常量。 SSLCipherSuiteUtil：tls认证配置参数的工具类，比如配置客户端不校验证书。 UnsupportProtocolException：异常处理类。 public class HttpClientDemo { private static final Logger LOG GER = LoggerFactory.getLogger(HttpClientDemo.class); public static void main(String[] args) throws Exception { // Create a new request. Request httpClientRequest = new Request(); try { // Set the request parameters. // AppKey, AppSecrect, Method and Url are required parameters. // Directly writing AK/SK in code is risky. For security, encrypt your AK/SK and store them in the configuration file or environment variables. // In this example, the AK/SK are stored in environment variables for identity authentication. // Before running this example, set environment variables HUAWEICLOUD_SDK_AK and HUAWEICLOUD_SDK_SK. httpClientRequest.setKey(System.getenv("HUAWEICLOUD_SDK_AK")); httpClientRequest.setSecret(System.getenv("HUAWEICLOUD_SDK_SK")); httpClientRequest.setMethod("POST"); // Set a request URL in the format of https://{Endpoint}/{URI}. httpClientRequest.setUrl("put your request url here"); httpClientRequest.addHeader("Content-Type", "text/plain"); // Set a body for http request. httpClientRequest.setBody("put your request body here"); } catch (Exception e) { LOGGER.error(e.getMessage()); return; } CloseableHttpClient client = null; try { // Sign the request. HttpRequestBase signedRequest = Client.sign(httpClientRequest, Constant.SIGNATURE_ALGORITHM_SDK_HMAC_SHA256); if (Constant.DO_VERIFY) { // creat httpClient and verify ssl certificate HostName.setUrlHostName(httpClientRequest.getHost()); client = (CloseableHttpClient) SSLCipherSuiteUtil.createHttpClientWithVerify(Constant.INTERNATIONAL_PROTOCOL); } else { // creat httpClient and do not verify ssl certificate client = (CloseableHttpClient) SSLCipherSuiteUtil.createHttpClient(Constant.INTERNATIONAL_PROTOCOL); } HttpResponse response = client.execute(signedRequest); // Print the body of the response. HttpEntity resEntity = response.getEntity(); if (resEntity != null) { LOGGER.info("Processing Body with name: {} and value: {}", System.getProperty("line.separator"), EntityUtils.toString(resEntity, "UTF-8")); } } catch (Exception e) { LOGGER.error(e.getMessage()); } finally { if (client != null) { client.close(); } } } } 运行HttpClientDemo.java，对请求进行签名、访问API并打印结果。 示例结果如下： [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Print the authorization: [Authorization: SDK-HMAC-SHA256 Access=3afe0280a6e1466e9cb6f23bcccdba29, SignedHeaders=host;x-sdk-date, Signature=26b2abfa40a4acf3c38b286cb6cbd9f07c2c22d1285bf0d4f6cf1f02d3bfdbf6] [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Print the status line of the response: HTTP/1.1 200 OK [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Header with name: Date and value: Fri, 26 Aug 2022 08:58:51 GMT [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Header with name: Content-Type and value: application/json [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Header with name: Transfer-Encoding and value: chunked [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Header with name: Connection and value: keep-alive [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Header with name: Server and value: api-gateway [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Header with name: X-Request-Id and value: 10955c5346b9512d23f3fd4c1bf2d181 [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Body with name: and value: {"200": "sdk success"} 显示{"200": "sdk success"}，表示签名成功，API成功请求到后端。 如果改变AK或SK的值，API网关将返回的错误信息error_msg。

API调用 示例代码修改调用环境信息后可直接调用。以下以新建工程为例，介绍如何在您的应用中调用SDK进行请求签名。 把API信息替换到HttpClientDemo.java中对应位置。 本示例以AK和SK保存在环境变量中为例，运行本示例前请先在本地环境中设置环境变量HUAWEICLOUD_SDK_AK和HUAWEICLOUD_SDK_SK。以Linux系统为例在本地将已获取的AK/SK设置为环境变量。 打开终端，输入以下命令打开环境变量配置文件。 vi ~/.bashrc 设置环境变量，保存文件并退出编辑器。 export HUAWEICLOUD_SDK_AK="已获取AK值" export HUAWEICLOUD_SDK_SK="已获取SK值" 输入以下命令使配置文件生效。 source ~/.bashrc 把API信息和已设置的环境变量替换到HttpClientDemo.java中对应位置。 HttpClientDemo中引用以下类，可在“获取SDK”包中的“src”文件下查看： Constant：demo中用到的常量。 SSLCipherSuiteUtil：tls认证配置参数的工具类，比如配置客户端不校验证书。 UnsupportProtocolException：异常处理类。 public class HttpClientDemo { private static final Logger LOGGER = LoggerFactory.getLogger(HttpClientDemo.class); public static void main(String[] args) throws Exception { // Create a new request. Request httpClientRequest = new Request(); try { // Set the request parameters. // AppKey, AppSecrect, Method and Url are required parameters. // Directly writing AK/SK in code is risky. For security, encrypt your AK/SK and store them in the configuration file or environment variables. // In this example, the AK/SK are stored in environment variables for identity authentication. // Before running this example, set environment variables HUAWEICLOUD_SDK_AK and HUAWEICLOUD_SDK_SK. httpClientRequest.setKey(System.getenv("HUAWEICLOUD_SDK_AK")); httpClientRequest.setSecret(System.getenv("HUAWEICLOUD_SDK_SK")); httpClientRequest.setMethod("POST"); // Set a request URL in the format of https://{Endpoint}/{URI}. httpClientRequest.setUrl("put your request url here"); httpClientRequest.addHeader("Content-Type", "text/plain"); // Set a body for http request. httpClientRequest.setBody("put your request body here"); } catch (Exception e) { LOGGER.error(e.getMessage()); return; } CloseableHttpClient client = null; try { // Sign the request. HttpRequestBase signedRequest = Client.sign(httpClientRequest, Constant.SIGNATURE_ALGORITHM_SDK_HMAC_SHA256); if (Constant.DO_VERIFY) { // creat httpClient and verify ssl certificate HostName.setUrlHostName(httpClientRequest.getHost()); client = (CloseableHttpClient) SSLCipherSuiteUtil.createHttpClientWithVerify(Constant.INTERNATIONAL_PROTOCOL); } else { // creat httpClient and do not verify ssl certificate client = (CloseableHttpClient) SSLCipherSuiteUtil.createHttpClient(Constant.INTERNATIONAL_PROTOCOL); } HttpResponse response = client.execute(signedRequest); // Print the body of the response. HttpEntity resEntity = response.getEntity(); if (resEntity != null) { LOGGER.info("Processing Body with name: {} and value: {}", System.getProperty("line.separator"), EntityUtils.toString(resEntity, "UTF-8")); } } catch (Exception e) { LOGGER.error(e.getMessage()); } finally { if (client != null) { client.close(); } } } } 运行HttpClientDemo.java，对请求进行签名、访问API并打印结果。 示例结果如下： [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Print the authorization: [Authorization: SDK-HMAC-SHA256 Access=3afe0280a6e1466e9cb6f23bcccdba29, SignedHeaders=host;x-sdk-date, Signature=26b2abfa40a4acf3c38b286cb6cbd9f07c2c22d1285bf0d4f6cf1f02d3bfdbf6] [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Print the status line of the response: HTTP/1.1 200 OK [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Header with name: Date and value: Fri, 26 Aug 2022 08:58:51 GMT [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Header with name: Content-Type and value: application/json [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Header with name: Transfer-Encoding and value: chunked [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Header with name: Connection and value: keep-alive [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Header with name: Server and value: api-gateway [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Header with name: X-Request-Id and value: 10955c5346b9512d23f3fd4c1bf2d181 [main] INFO com.huawei.apig.sdk.demo.HttpClientDemo - Processing Body with name: and value: {"200": "sdk success"} 显示{"200": "sdk success"}，表示签名成功，API成功请求到后端。 如果改变AK或SK的值，API网关将返回的错误信息error_msg。

获取SDK 签名SDK只包含签名功能，不包含云服务的SDK功能，云服务SDK请参见SDK。 点此下载SDK与Demo。 解压时选择解压到当前文件夹，解压后目录结构如下： 名称 说明 hasher.cpp SDK代码 hasher.h header.h RequestParams.cpp RequestParams.h signer.cpp signer.h constants.h Makefile Makefile文件 main.cpp 示例代码