D'autres AWS SDK exemples sont disponibles dans le GitHub dépôt AWS Doc SDK Examples.
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Exemples de code pour Amazon S3 utilisant AWS SDKs
Les exemples de code suivants vous montrent comment utiliser Amazon Simple Storage Service avec un kit de développement AWS logiciel (SDK).
Les principes de base sont des exemples de code qui vous montrent comment effectuer les opérations essentielles au sein d'un service.
Les actions sont des extraits de code de programmes plus larges et doivent être exécutées dans leur contexte. Alors que les actions vous montrent comment appeler des fonctions de service individuelles, vous pouvez les visualiser dans leur contexte dans leurs scénarios associés.
Les scénarios sont des exemples de code qui vous montrent comment accomplir des tâches spécifiques en appelant plusieurs fonctions au sein d'un service ou en les combinant à d'autres Services AWS.
Ressources supplémentaires
Mise en route
Les exemples de code suivants montrent comment démarrer avec Amazon S3.
- C++
-
- SDKpour C++
-
Code du fichier CMakeLists CMake .txt.
# 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 pour le fichier source hello_s3.cpp.
#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;
}
- Go
-
- SDKpour Go V2
-
package main
import (
"context"
"fmt"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/s3"
)
// main uses the AWS SDK for Go V2 to create an Amazon Simple Storage Service
// (Amazon S3) client and list up to 10 buckets in your account.
// This example uses the default settings specified in your shared credentials
// and config files.
func main() {
ctx := context.Background()
sdkConfig, err := config.LoadDefaultConfig(ctx)
if err != nil {
fmt.Println("Couldn't load default configuration. Have you set up your AWS account?")
fmt.Println(err)
return
}
s3Client := s3.NewFromConfig(sdkConfig)
count := 10
fmt.Printf("Let's list up to %v buckets for your account.\n", count)
result, err := s3Client.ListBuckets(ctx, &s3.ListBucketsInput{})
if err != nil {
fmt.Printf("Couldn't list buckets for your account. Here's why: %v\n", err)
return
}
if len(result.Buckets) == 0 {
fmt.Println("You don't have any buckets!")
} else {
if count > len(result.Buckets) {
count = len(result.Buckets)
}
for _, bucket := range result.Buckets[:count] {
fmt.Printf("\t%v\n", *bucket.Name)
}
}
}
- Java
-
- SDKpour Java 2.x
-
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.s3.S3Client;
import software.amazon.awssdk.services.s3.model.Bucket;
import software.amazon.awssdk.services.s3.model.ListBucketsResponse;
import software.amazon.awssdk.services.s3.model.S3Exception;
import java.util.List;
/**
* Before running this Java V2 code example, set up your development
* environment, including your credentials.
* <p>
* For more information, see the following documentation topic:
* <p>
* https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
*/
public class HelloS3 {
public static void main(String[] args) {
Region region = Region.US_EAST_1;
S3Client s3 = S3Client.builder()
.region(region)
.build();
listBuckets(s3);
}
/**
* Lists all the S3 buckets associated with the provided AWS S3 client.
*
* @param s3 the S3Client instance used to interact with the AWS S3 service
*/
public static void listBuckets(S3Client s3) {
try {
ListBucketsResponse response = s3.listBuckets();
List<Bucket> bucketList = response.buckets();
bucketList.forEach(bucket -> {
System.out.println("Bucket Name: " + bucket.name());
});
} catch (S3Exception e) {
System.err.println(e.awsErrorDetails().errorMessage());
System.exit(1);
}
}
}
- JavaScript
-
- SDKpour JavaScript (v3)
-
import {
paginateListBuckets,
S3Client,
S3ServiceException,
} from "@aws-sdk/client-s3";
/**
* List the S3 buckets in your configured AWS account.
*/
export const helloS3 = async () => {
// When no region or credentials are provided, the SDK will use the
// region and credentials from the local AWS config.
const client = new S3Client({});
try {
/**
* @type { import("@aws-sdk/client-s3").Bucket[] }
*/
const buckets = [];
for await (const page of paginateListBuckets({ client }, {})) {
buckets.push(...page.Buckets);
}
console.log("Buckets: ");
console.log(buckets.map((bucket) => bucket.Name).join("\n"));
return buckets;
} catch (caught) {
// ListBuckets does not throw any modeled errors. Any error caught
// here will be something generic like `AccessDenied`.
if (caught instanceof S3ServiceException) {
console.error(`${caught.name}: ${caught.message}`);
} else {
// Something besides S3 failed.
throw caught;
}
}
};
- PHP
-
- SDK pour PHP
-
use Aws\S3\S3Client;
$client = new S3Client(['region' => 'us-west-2']);
$results = $client->listBuckets();
var_dump($results);
- Python
-
- SDKpour Python (Boto3)
-
import boto3
def hello_s3():
"""
Use the AWS SDK for Python (Boto3) to create an Amazon Simple Storage Service
(Amazon S3) resource and list the buckets in your account.
This example uses the default settings specified in your shared credentials
and config files.
"""
s3_resource = boto3.resource("s3")
print("Hello, Amazon S3! Let's list your buckets:")
for bucket in s3_resource.buckets.all():
print(f"\t{bucket.name}")
if __name__ == "__main__":
hello_s3()
- Ruby
-
- SDKpour Ruby
-
# frozen_string_literal: true
# S3Manager is a class responsible for managing S3 operations
# such as listing all S3 buckets in the current AWS account.
class S3Manager
def initialize(client)
@client = client
@logger = Logger.new($stdout)
end
# Lists and prints all S3 buckets in the current AWS account.
def list_buckets
@logger.info('Here are the buckets in your account:')
response = @client.list_buckets
if response.buckets.empty?
@logger.info("You don't have any S3 buckets yet.")
else
response.buckets.each do |bucket|
@logger.info("- #{bucket.name}")
end
end
rescue Aws::Errors::ServiceError => e
@logger.error("Encountered an error while listing buckets: #{e.message}")
end
end
if $PROGRAM_NAME == __FILE__
s3_client = Aws::S3::Client.new
manager = S3Manager.new(s3_client)
manager.list_buckets
end
- Rust
-
- SDKpour Rust
-
/// S3 Hello World Example using the AWS SDK for Rust.
///
/// This example lists the objects in a bucket, uploads an object to that bucket,
/// and then retrieves the object and prints some S3 information about the object.
/// This shows a number of S3 features, including how to use built-in paginators
/// for large data sets.
///
/// # Arguments
///
/// * `client` - an S3 client configured appropriately for the environment.
/// * `bucket` - the bucket name that the object will be uploaded to. Must be present in the region the `client` is configured to use.
/// * `filename` - a reference to a path that will be read and uploaded to S3.
/// * `key` - the string key that the object will be uploaded as inside the bucket.
async fn list_bucket_and_upload_object(
client: &aws_sdk_s3::Client,
bucket: &str,
filepath: &Path,
key: &str,
) -> Result<(), S3ExampleError> {
// List the buckets in this account
let mut objects = client
.list_objects_v2()
.bucket(bucket)
.into_paginator()
.send();
println!("key\tetag\tlast_modified\tstorage_class");
while let Some(Ok(object)) = objects.next().await {
for item in object.contents() {
println!(
"{}\t{}\t{}\t{}",
item.key().unwrap_or_default(),
item.e_tag().unwrap_or_default(),
item.last_modified()
.map(|lm| format!("{lm}"))
.unwrap_or_default(),
item.storage_class()
.map(|sc| format!("{sc}"))
.unwrap_or_default()
);
}
}
// Prepare a ByteStream around the file, and upload the object using that ByteStream.
let body = aws_sdk_s3::primitives::ByteStream::from_path(filepath)
.await
.map_err(|err| {
S3ExampleError::new(format!(
"Failed to create bytestream for {filepath:?} ({err:?})"
))
})?;
let resp = client
.put_object()
.bucket(bucket)
.key(key)
.body(body)
.send()
.await?;
println!(
"Upload success. Version: {:?}",
resp.version_id()
.expect("S3 Object upload missing version ID")
);
// Retrieve the just-uploaded object.
let resp = client.get_object().bucket(bucket).key(key).send().await?;
println!("etag: {}", resp.e_tag().unwrap_or("(missing)"));
println!("version: {}", resp.version_id().unwrap_or("(missing)"));
Ok(())
}
ExampleError Utilitaires S3
/// S3ExampleError provides a From<T: ProvideErrorMetadata> impl to extract
/// client-specific error details. This serves as a consistent backup to handling
/// specific service errors, depending on what is needed by the scenario.
/// It is used throughout the code examples for the AWS SDK for Rust.
#[derive(Debug)]
pub struct S3ExampleError(String);
impl S3ExampleError {
pub fn new(value: impl Into<String>) -> Self {
S3ExampleError(value.into())
}
pub fn add_message(self, message: impl Into<String>) -> Self {
S3ExampleError(format!("{}: {}", message.into(), self.0))
}
}
impl<T: aws_sdk_s3::error::ProvideErrorMetadata> From<T> for S3ExampleError {
fn from(value: T) -> Self {
S3ExampleError(format!(
"{}: {}",
value
.code()
.map(String::from)
.unwrap_or("unknown code".into()),
value
.message()
.map(String::from)
.unwrap_or("missing reason".into()),
))
}
}
impl std::error::Error for S3ExampleError {}
impl std::fmt::Display for S3ExampleError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.0)
}
}
