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Introduction

  • Welcome to Tencent Cloud Software Development Kit (SDK) 3.0, a companion tool for TencentCloud API 3.0. Tencent Cloud SDK 3.0 has been capable of calling the APIs of Cloud Virtual Machine (CVM), Virtual Private Cloud (VPC), and Cloud Block Storage (CBS). Tencent Cloud SDK 3.0 will extend its support for all Tencent Cloud services and products in the future. The new SDK version is unified and provides the following features for you: you can use the same SDK usage method, API call methods, error codes, and return packet formats for different programming languages.
  • This document introduces Tencent Cloud SDK for C++ to help C++ developers debug and integrate TencentCloud APIs. If you are using Tencent Cloud SDK for C++ for the first time, you can follow the sample code provided in this document.

Environmental Dependencies

Preparation

  1. Activate a desired product in the Tencent Cloud Console.
  2. Get the SecretID, SecretKey, and endpoint for calling the API of the product. An endpoint is typically in the format of *.tencentcloudapi.com. For example, the endpoint for calling the API of CVM is cvm.tencentcloudapi.com. For more information, please see the documentation of the specified product.

Compiler

  • Supports C++ 11 or later versions: GCC 4.8 or later.
  • Only supports the Linux operating system, not Windows.

Compilation tool

Install CMake 3.0 or later. Examples:

In Ubuntu, run the following command:
sudo apt-get install cmake

In CentOS, run the following command:
yum install cmake3

Dependent library

Samples:

In Ubuntu, run the following command:
sudo apt-get install libcurl4-openssl-dev

In CentOS, run the following command:
yum install libcurl-devel

Note: we recommend that you install the latest version of the libcurl library to avoid memory leaks in the libcurl library.

Samples:

In Ubuntu, run the following command:
sudo apt-get install libssl-dev

In CentOS, run the following command:
yum install openssl-devel
  • libuuid

Samples:

In Ubuntu, run the following command:
sudo apt-get install uuid-dev

In CentOS, run the following command:
yum install libuuid-devel

SDK build from source code

  1. Go to the GitHub code hosting page to download the latest source code package.

  2. Go to the directory where the SDK package is stored and create necessary build files.

cd <path/to/tencentcloud-sdk-cpp-intl-en>
mkdir sdk_build
cd sdk_build
cmake ..
make
sudo make install

Samples of Using Tencent Cloud SDK for C++

The following code samples describe how to call the DescribeInstances API of CVM.

Simplified code

#include <tencentcloud/core/TencentCloud.h>
#include <tencentcloud/core/Credential.h>
#include <tencentcloud/cvm/v20170312/CvmClient.h>
#include <tencentcloud/cvm/v20170312/model/DescribeInstancesRequest.h>
#include <tencentcloud/cvm/v20170312/model/DescribeInstancesResponse.h>
#include <tencentcloud/cvm/v20170312/model/Instance.h>

#include <iostream>
#include <string>

using namespace TencentCloud;
using namespace TencentCloud::Cvm::V20170312;
using namespace TencentCloud::Cvm::V20170312::Model;
using namespace std;

int main()
{
    TencentCloud::InitAPI();

    string secretId = "<your secret id>";
    string secretKey = "<your secret key>";
    Credential cred = Credential(secretId, secretKey);

    DescribeInstancesRequest req = DescribeInstancesRequest();

    CvmClient cvm_client = CvmClient(cred, "ap-guangzhou");

    auto outcome = cvm_client.DescribeInstances(req);
    if (!outcome.IsSuccess())
    {
        cout << outcome.GetError().PrintAll() << endl;
        TencentCloud::ShutdownAPI();
        return -1;
    }
    DescribeInstancesResponse rsp = outcome.GetResult();
    cout<<"RequestId="<<rsp.GetRequestId()<<endl;
    cout<<"TotalCount="<<rsp.GetTotalCount()<<endl;
    if (rsp.InstanceSetHasBeenSet())
    {
        vector<Instance> instanceSet = rsp.GetInstanceSet();
        for (auto itr=instanceSet.begin(); itr!=instanceSet.end(); ++itr)
        {
            cout<<(*itr).GetPlacement().GetZone()<<endl;
        }
    }

    TencentCloud::ShutdownAPI();

    return 0;
}

Detailed code

#include <tencentcloud/core/TencentCloud.h>
#include <tencentcloud/core/profile/HttpProfile.h>
#include <tencentcloud/core/profile/ClientProfile.h>
#include <tencentcloud/core/Credential.h>
#include <tencentcloud/core/NetworkProxy.h>
#include <tencentcloud/core/AsyncCallerContext.h>
#include <tencentcloud/cvm/v20170312/CvmClient.h>
#include <tencentcloud/cvm/v20170312/model/DescribeInstancesRequest.h>
#include <tencentcloud/cvm/v20170312/model/DescribeInstancesResponse.h>
#include <tencentcloud/cvm/v20170312/model/Instance.h>

#include <iostream>
#include <string>

using namespace TencentCloud;
using namespace TencentCloud::Cvm::V20170312;
using namespace TencentCloud::Cvm::V20170312::Model;
using namespace std;

int main()
{
    TencentCloud::InitAPI();

    // Use the SDK.
    // Instantiate an authentication object. Pass in secretID and secretKey of your Tencent Cloud account as the input parameters and keep them confidential.
    string secretId = "<your secret id>";
    string secretKey = "<your secret key>";
    Credential cred = Credential(secretId, secretKey);

    // (Optional) Instantiate an HTTP option.
    HttpProfile httpProfile = HttpProfile();
    httpProfile.SetKeepAlive(true);  // Specify whether to enable the keepalive feature. The default value is false.
    httpProfile.SetEndpoint("cvm.ap-guangzhou.tencentcloudapi.com");  // Specify the endpoint. If you do not specify the endpoint, nearby access is enabled by default.
    httpProfile.SetReqTimeout(30);  // Specify the request timeout value, in seconds. The default value is 60s.
    httpProfile.SetConnectTimeout(30); // Specify the response timeout value, in seconds. The default value is 60s.

    ClientProfile clientProfile = ClientProfile(httpProfile);

    DescribeInstancesRequest req = DescribeInstancesRequest();
    req.SetOffset(0);
    req.SetLimit(5);

    CvmClient cvm_client = CvmClient(cred, "ap-guangzhou", clientProfile);

    // set proxy.
    // NetworkProxy proxy = NetworkProxy(NetworkProxy::Type::HTTP, "localhost.proxy.com", 8080);
    // cvm_client.SetNetworkProxy(proxy);

    auto outcome = cvm_client.DescribeInstances(req);
    if (!outcome.IsSuccess())
    {
        cout << outcome.GetError().PrintAll() << endl;
        TencentCloud::ShutdownAPI();
        return -1;
    }
    DescribeInstancesResponse rsp = outcome.GetResult();
    cout<<"RequestId="<<rsp.GetRequestId()<<endl;
    cout<<"TotalCount="<<rsp.GetTotalCount()<<endl;
    if (rsp.InstanceSetHasBeenSet())
    {
        vector<Instance> instanceSet = rsp.GetInstanceSet();
        for (auto itr=instanceSet.begin(); itr!=instanceSet.end(); ++itr)
        {
            cout<<(*itr).GetPlacement().GetZone()<<endl;
        }
    }

    TencentCloud::ShutdownAPI();

    return 0;
}

Compile and run the demo code.

cd example/cvm/v20170312
mkdir build
cd build
cmake ..
make
./DescribeInstances

If the system returns an error indicating that a dynamic library is not found, you can specify the path to the dynamic library. Assume that the libtencentcloud-sdk-cpp-intl-en-core.so library is installed in /usr/local/lib. Then add the following line:

export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
./DescribeInstances

For more samples, please see the example directory.

Unit Testing

Creating the dependent library for gtest

Run the following commands:

git clone https://github.com/google/googletest
cd googletest
cmake CMakeLists.txt
make

Copy the generated libgtest.a libgtest_main.a static library and the header file of gtest to the system directory.

Setting environment variables

  • ENV_SecretId: enter your secret ID.
  • ENV_SecretKey: enter your secret key.

Running the test

Run the following script:

sh function_test.sh

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