来自 php 的 AWS dynamodb 查询

Question

I have a react application and i'm trying to use aws dynamodb, i installed the php sdk but i don't know how to query my db.

I copied the tutorial here and i changed the endpoint to: "https://dynamodb.us-west-2.amazonaws.com".

I get this error: {"__type":"com.amazon.coral.service#UnrecognizedClientException","message":"The security token included in the request is invalid."}. I guess i have to add a security token somewhere, i don't know where and neither where to find it.

Any suggestion?

Answer 1

Based on your error, i think you need to check your aws secret key and access key. You can try to install aws cli then create user access programmatically from aws console from this link

Then you can try your source code after that.

Answer 2

The following code example shows how to get an item from a DynamoDB table.

// '/path/to/aws-autoloader.php' to import AWS SDKs.
require 'vendor/autoload.php';

use Aws\DynamoDb\DynamoDbClient;
use Aws\Exception\AwsException;
use Aws\DynamoDb\Exception\DynamoDbException;

// Create an SDK class used to share configuration across clients.
$sdk = new Aws\Sdk([
    'region'   => 'us-west-2',
    'version'  => 'latest'
]);

// Use an Aws\Sdk class to create the dynamoDbClient object.
$dynamoDbClient = $sdk->createDynamoDb();

try {
    $dynamoDbClient->getItem([
                'Key'       => [
                    'id' => [
                        'N' => 1,
                    ],
                ],
                'TableName' => 'products',
            ]);
} catch (DynamoDbException $e) {
    // Catch a DynamoDb-specific exception.
    echo $e->getMessage();
} catch (AwsException $e) {
    // This catches the more generic AwsException. You can grab information
    // from the exception using methods of the exception object.
    echo $e->getAwsRequestId() . "\n";
    echo $e->getAwsErrorType() . "\n";
    echo $e->getAwsErrorCode() . "\n";

    // This dumps any modeled response data, if supported by the service
    // Specific members can be accessed directly (e.g. $e['MemberName'])
    var_dump($e->toArray());
}

Notice that we did not explicitly provide credentials to the client. That's because the SDK should detect the credentials from environment variables (via AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY ), an AWS credentials INI file in your HOME directory, AWS Identity and Access Management (IAM) instance profile credentials, or credential providers. If we don't provide a credentials option, the SDK attempts to load credentials from your environment in the following order:

1. Load credentials from environment variables .
2. Load credentials from a credentials.ini file .
3. Load credentials from IAM role .

We can also directly create the service-specific client object like below:

$dynamoDbClient = new DynamoDbClient(
        [
            'region'  => 'us-west-2',
            'version' => 'latest',
        ]

But AWS highly recommended that you use the Sdk class to create clients if you're using multiple client instances in your application. As per AWS docs:-

The Sdk class automatically uses the same HTTP client for each SDK client, allowing SDK clients for different services to perform nonblocking HTTP requests. If the SDK clients don't use the same HTTP client, then HTTP requests sent by the SDK client might block promise orchestration between services.

You can refer to the AWS document pages:-

1. AWS SDK PHP - BASIC USAGE
2. AWS SDK PHP - DynamoDB Examples
3. AWS SDK PHP - Configuration guide
4. AWS SDK PHP - APIs

I hope this helps.