Hello Amazon S3
The following code examples show how to get started using Amazon S3.
- SDK for C++
-
Note
There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository
. Code for the CMakeLists.txt CMake file.
# Set the minimum required version of CMake for this project. cmake_minimum_required(VERSION 3.13) # Set the AWS service components used by this project. set(SERVICE_COMPONENTS s3) # Set this project's name. project("hello_s3") # Set the C++ standard to use to build this target. # At least C++ 11 is required for the AWS SDK for C++. set(CMAKE_CXX_STANDARD 11) # Use the MSVC variable to determine if this is a Windows build. set(WINDOWS_BUILD ${MSVC}) if (WINDOWS_BUILD) # Set the location where CMake can find the installed libraries for the AWS SDK. string(REPLACE ";" "/aws-cpp-sdk-all;" SYSTEM_MODULE_PATH "${CMAKE_SYSTEM_PREFIX_PATH}/aws-cpp-sdk-all") list(APPEND CMAKE_PREFIX_PATH ${SYSTEM_MODULE_PATH}) endif () # Find the AWS SDK for C++ package. find_package(AWSSDK REQUIRED COMPONENTS ${SERVICE_COMPONENTS}) if (WINDOWS_BUILD AND AWSSDK_INSTALL_AS_SHARED_LIBS) # Copy relevant AWS SDK for C++ libraries into the current binary directory for running and debugging. # set(BIN_SUB_DIR "/Debug") # if you are building from the command line you may need to uncomment this # and set the proper subdirectory to the executables' location. AWSSDK_CPY_DYN_LIBS(SERVICE_COMPONENTS "" ${CMAKE_CURRENT_BINARY_DIR}${BIN_SUB_DIR}) endif () add_executable(${PROJECT_NAME} hello_s3.cpp) target_link_libraries(${PROJECT_NAME} ${AWSSDK_LINK_LIBRARIES})
Code for the hello_s3.cpp source file.
#include <aws/core/Aws.h> #include <aws/s3/S3Client.h> #include <iostream> #include <aws/core/auth/AWSCredentialsProviderChain.h> using namespace Aws; using namespace Aws::Auth; /* * A "Hello S3" starter application which initializes an Amazon Simple Storage Service (Amazon S3) client * and lists the Amazon S3 buckets in the selected region. * * main function * * Usage: 'hello_s3' * */ int main(int argc, char **argv) { Aws::SDKOptions options; // Optionally change the log level for debugging. // options.loggingOptions.logLevel = Utils::Logging::LogLevel::Debug; Aws::InitAPI(options); // Should only be called once. int result = 0; { Aws::Client::ClientConfiguration clientConfig; // Optional: Set to the AWS Region (overrides config file). // clientConfig.region = "us-east-1"; // You don't normally have to test that you are authenticated. But the S3 service permits anonymous requests, thus the s3Client will return "success" and 0 buckets even if you are unauthenticated, which can be confusing to a new user. auto provider = Aws::MakeShared<DefaultAWSCredentialsProviderChain>("alloc-tag"); auto creds = provider->GetAWSCredentials(); if (creds.IsEmpty()) { std::cerr << "Failed authentication" << std::endl; } Aws::S3::S3Client s3Client(clientConfig); auto outcome = s3Client.ListBuckets(); if (!outcome.IsSuccess()) { std::cerr << "Failed with error: " << outcome.GetError() << std::endl; result = 1; } else { std::cout << "Found " << outcome.GetResult().GetBuckets().size() << " buckets\n"; for (auto &bucket: outcome.GetResult().GetBuckets()) { std::cout << bucket.GetName() << std::endl; } } } Aws::ShutdownAPI(options); // Should only be called once. return result; }
-
For API details, see ListBuckets in AWS SDK for C++ API Reference.
-
For a complete list of AWS SDK developer guides and code examples, see Developing with Amazon S3 using the AWS SDKs. This topic also includes information about getting started and details about previous SDK versions.