1.首先打开链接：https://next.api.aliyun.com/api/Iot/2018-01-20/Pub?params={}&sdkStyle=old&tab=DEBUG&lang=CPP
在这里调试pub接口，填入正确的ProductKey，TopicFullName，MessageContent，如果是企业实例，需要选择对应的地域和IotInstanceId。
2.在SDK示例中，找到原版的c++代码，拷贝出来保存。
截图中的代码保存为 pub.cc：
#include<cstdlib>
#include<iostream>
#include<alibabacloud/core/AlibabaCloud.h>
#include<alibabacloud/core/CommonRequest.h>
#include<alibabacloud/core/CommonClient.h>
#include<alibabacloud/core/CommonResponse.h>
usingnamespace std;
usingnamespace AlibabaCloud;
int main(int argc,char** argv )
{
AlibabaCloud::InitializeSdk();
AlibabaCloud::ClientConfiguration configuration("cn-shanghai");
// specify timeout when create client.
configuration.setConnectTimeout(1500);
configuration.setReadTimeout(4000);
AlibabaCloud::Credentials credential("","");
/* use STS Token
credential.setSessionToken( "" );
*/
AlibabaCloud::CommonClient client( credential, configuration );
AlibabaCloud::CommonRequest request(AlibabaCloud::CommonRequest::RequestPattern::RpcPattern);
request.setHttpMethod(AlibabaCloud::HttpRequest::Method::Post);
request.setDomain("iot.cn-shanghai.aliyuncs.com");
request.setVersion("2018-01-20");
request.setQueryParameter("Action","Pub");
request.setQueryParameter("TopicFullName","/${productKey}/${deviceName}/user/get");
request.setQueryParameter("ProductKey","${productKey}");
request.setQueryParameter("MessageContent","dGhpcyBpcyBhIGV4YW1wbGU=");
auto response = client.commonResponse(request);
if(response.isSuccess()){
printf("request success.\n");
printf("result: %s\n", response.result().payload().c_str());
}else{
printf("error: %s\n", response.error().errorMessage().c_str());
printf("request id: %s\n", response.error().requestId().c_str());
}
AlibabaCloud::ShutdownSdk();
return0;
}
2.登录阿里云ecs服务器，我的调试环境为：Ubuntu 20.04.2 LTS (GNU/Linux 5.4.0-73-generic x86_64)。
参考github中文档中的步骤依次执行：https://github.com/aliyun/aliyun-openapi-cpp-sdk/blob/master/README-CN.md
依次执行命令：
apt-get update
sudo apt-get install libcurl4-openssl-dev libssl-dev uuid-dev libjsoncpp-dev
//如果没有安装git，需要执行 sudo apt-get install git
git clone https://github.com/aliyun/aliyun-openapi-cpp-sdk.git
cd aliyun-openapi-cpp-sdk
mkdir sdk_build
cd sdk_build
cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_PRODUCT="iot"..
make
sudo make install
到此iot库已经编译成功，下面是编译过程中的截图。
接下来编译pub测试用例，把上面的保存的代码（本示例中代码参数需要自行填入，否则会运行失败），放到服务器某个地方。
执行命令：
g++ -o pub pub.cc --std=c++11 -lalibabacloud-sdk-core -l alibabacloud-sdk-iot
./pub
下面执行效果：
