sObject - Javascript Examples
Publisher: Psychz Networks, March 21,2025- Prerequisites
- Installing PHP SDK
- Creating Connection
- Listing Buckets
- Creating Buckets
- Listing Bucket's Content
- Deleting Bucket
- Creating Object
- Changing Object's ACL
- Deleting Object
- Downloading Object (To a File)
- Generating Object Download URL
- Conclusion
Integrating sObject with JavaScript
This guide demonstrates how to interact with sObject storage using JavaScript. The following examples use the AWS SDK for JavaScript. Replace the placeholder values with your sObject endpoint, access key, and secret key.
Installing the JavaScript SDK
To get started, ensure you have Node.js and npm installed. Install the AWS SDK for JavaScript by running:
npm install aws-sdkCreating a Connection
Create a connection to sObject by configuring the S3 client with sObject endpoint and credentials. Save the following code in a JavaScript file (for example, psychz_sobject_connection.js):
const AWS = require('aws-sdk');
const s3 = new AWS.S3({
endpoint: 'http://your-object-storage-endpoint',
accessKeyId: 'your-access-key',
secretAccessKey: 'your-secret-key',
s3ForcePathStyle: true, // Required for S3-compatible services
signatureVersion: 'v4'
});
console.log("Connected to object storage successfully.");
Listing Owned Buckets
Use the listBuckets method to retrieve and list all buckets owned by your account:
s3.listBuckets((err, data) => {
if (err) {
console.error('Error listing buckets:', err);
} else {
console.log('Buckets:');
data.Buckets.forEach(bucket => {
console.log(bucket.Name);
});
}
});
Creating A Bucket
Create a new bucket by specifying a unique bucket name:
const bucketName = 'my-new-bucket';
s3.createBucket({ Bucket: bucketName }, (err, data) => {
if (err) {
console.error('Error creating bucket:', err);
} else {
console.log(`Bucket "${bucketName}" created successfully.`);
}
});
Listing A Bucket's Content
List all objects stored in a bucket:
s3.listObjects({ Bucket: bucketName }, (err, data) => {
if (err) {
console.error('Error listing bucket contents:', err);
} else {
console.log(`Contents of "${bucketName}":`);
data.Contents.forEach(object => {
console.log(object.Key);
});
}
});
Deleting A Bucket
Ensure the bucket is empty before deletion. This example deletes all objects in the bucket and then the bucket itself.
// List objects in the bucket
s3.listObjects({ Bucket: bucketName }, (err, data) => {
if (err) {
console.error('Error listing bucket objects:', err);
} else {
const objects = data.Contents.map(object => ({ Key: object.Key }));
if (objects.length > 0) {
s3.deleteObjects({
Bucket: bucketName,
Delete: { Objects: objects }
}, (err, data) => {
if (err) {
console.error('Error deleting objects:', err);
} else {
// Delete the bucket
s3.deleteBucket({ Bucket: bucketName }, (err, data) => {
if (err) {
console.error('Error deleting bucket:', err);
} else {
console.log(`Bucket "${bucketName}" deleted successfully.`);
}
});
}
});
} else {
// If bucket is already empty
s3.deleteBucket({ Bucket: bucketName }, (err, data) => {
if (err) {
console.error('Error deleting bucket:', err);
} else {
console.log(`Bucket "${bucketName}" deleted successfully.`);
}
});
}
}
});
Creating An Object
Upload content to a new object in your bucket using the putObject method:
const objectKey = 'sample.txt';
const content = 'This is a sample object content.';
s3.putObject({
Bucket: bucketName,
Key: objectKey,
Body: content
}, (err, data) => {
if (err) {
console.error('Error creating object:', err);
} else {
console.log(`Object "${objectKey}" created successfully in bucket "${bucketName}".`);
}
});
Uploading An Object
To upload a file, use a file stream. Ensure you have the fs module available.
const fs = require('fs');
const filePath = 'path/to/your/file.txt';
const uploadKey = 'uploaded-file.txt';
const fileStream = fs.createReadStream(filePath);
fileStream.on('error', function(err) {
console.error('File Error:', err);
});
s3.upload({
Bucket: bucketName,
Key: uploadKey,
Body: fileStream
}, (err, data) => {
if (err) {
console.error('Error uploading file:', err);
} else {
console.log(`File uploaded successfully. Location: ${data.Location}`);
}
});
Download An Object
const downloadKey = 'uploaded-file.txt';
s3.getObject({ Bucket: bucketName, Key: downloadKey }, (err, data) => {
if (err) {
console.error('Error downloading object:', err);
} else {
// The downloaded content is available in data.Body as a Buffer
console.log(`Downloaded object content: ${data.Body.toString()}`);
}
});
Delete An Object
s3.deleteObject({ Bucket: bucketName, Key: objectKey }, (err, data) => {
if (err) {
console.error('Error deleting object:', err);
} else {
console.log(`Object "${objectKey}" deleted successfully from bucket "${bucketName}".`);
}
});
Change An Object's ACL
s3.putObjectAcl({
Bucket: bucketName,
Key: objectKey,
ACL: 'public-read'
}, (err, data) => {
if (err) {
console.error('Error changing object ACL:', err);
} else {
console.log(`ACL for object "${objectKey}" changed successfully.`);
}
});
Generate Object Download URL (Signed/Unsigned)
Signed URL (Temporary Access)
Generate a signed URL that expires after a specified time, or construct an unsigned URL for publicly accessible objects.
// Signed URL (expires in 20 minutes)
const signedUrl = s3.getSignedUrl('getObject', {
Bucket: bucketName,
Key: objectKey,
Expires: 60 * 20 // 20 minutes
});
console.log('Signed URL:', signedUrl);
Unsigned URL (For Public Objects)
If the object is public, you can manually construct the URL:
// Unsigned URL (for public objects)
const unsignedUrl = `${s3.endpoint.href.replace(/\/$/, '')}/${bucketName}/${objectKey}`;
console.log('Unsigned URL:', unsignedUrl);
Conclusion
These examples provide a starting point for integrating sObject into JavaScript applications. Adjust the code as needed to match your environment and security requirements. This guide provided sample code for installing the SDK, establishing a connection, and performing various bucket and object operations.
Happy coding!