Torch Object Storage
Torch Object Storage
Torch Object Storage
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- Documentation
Torch Object StorageSDK ReferenceHarmonyQuick Start (Harmony SDK)
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Quick Start (Harmony SDK)
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This document introduces how to quickly use the TOS Harmony SDK to perform common operations, such as creating buckets, uploading, downloading, and deleting objects.
Prerequisites
Create Bucket
A bucket in TOS serves as a globally unique namespace, functioning as a data container for storing object data. <SOURCE_TEXT>The following code demonstrates how to create a bucket.</SOURCE_TEXT>
import { TosClient, TosClientError, TosServerError } from '@volcengine/tos_harmonyos_sdk';
const client = new TosClient({
accessKeyId: "Provide your ak",
accessKeySecret: "Provide your sk",
securityToken: 'Provide your securityToken',
region: "Provide your region",
endpoint: "Provide your endpoint",
});
const bucketName = 'harmonyos-sdk-test-bucket';
function handleError(error: Error) {
if (error instanceof TosClientError) {
console.log('Client Err Msg:', error.message);
console.log('Client Err Stack:', error.stack);
} else if (error instanceof TosServerError) {
console.log('Request ID:', error.requestId);
console.log('Response Status Code:', error.statusCode);
console.log('Response Header:', error.headers);
console.log('Response Err Code:', error.code);
console.log('Response Err Msg:', error.message);
} else {
console.log('unexpected exception, message: ', error);
}
}
async function main() {
try {
await client.createBucket({
Bucket: bucketName,
});
const { data } = await client.listBuckets();
const theBucket = data.Buckets.find(it => it.Name === bucketName);
console.log('the bucket info', theBucket);
} catch (error) {
handleError(error);
}
}
main();
tip
Upload Object
After the storage bucket is successfully created, objects can be uploaded to the bucket. The following code demonstrates how to upload an object to the newly created bucket.
tip
import { TosClient, TosClientError, TosServerError } from '@volcengine/tos_harmonyos_sdk';
const client = new TosClient({
accessKeyId: "Provide your ak",
accessKeySecret: "Provide your sk",
securityToken: 'Provide your securityToken',
region: "Provide your region",
endpoint: "Provide your endpoint",
});
function handleError(error: Error) {
if (error instanceof TosClientError) {
console.log('Client Err Msg:', error.message);
console.log('Client Err Stack:', error.stack);
} else if (error instanceof TosServerError) {
console.log('Request ID:', error.requestId);
console.log('Response Status Code:', error.statusCode);
console.log('Response Header:', error.headers);
console.log('Response Err Code:', error.code);
console.log('Response Err Msg:', error.message);
} else {
console.log('unexpected exception, message: ', error);
}
}
async function main() {
try {
const bucketName = 'harmonyos-sdk-test-bucket';
const objectName = 'example_dir/example.txt';
await client.putObject({
Bucket: bucketName,
Key: objectName,
Content: Content: buffer.from('a123').buffer,
});
const res = await client.headObject({
Bucket: bucketName,
Key: objectName,
});
// object size: 4
console.log('object size:', res.ContentLength);
} catch (error) {
handleError(error);
}
}
main();
tip
Download Object
The following code demonstrates how to download an object from a bucket.
import { TosClient, TosClientError, TosServerError } from '@volcengine/tos_harmonyos_sdk';
const client = new TosClient({
accessKeyId: "Provide your ak",
accessKeySecret: "Provide your sk",
securityToken: 'Provide your securityToken',
region: "Provide your region",
endpoint: "Provide your endpoint",
});
function handleError(error: Error) {
if (error instanceof TosClientError) {
console.log('Client Err Msg:', error.message);
console.log('Client Err Stack:', error.stack);
} else if (error instanceof TosServerError) {
console.log('Request ID:', error.requestId);
console.log('Response Status Code:', error.statusCode);
console.log('Response Header:', error.headers);
console.log('Response Err Code:', error.code);
console.log('Response Err Msg:', error.message);
} else {
console.log('unexpected exception, message: ', error);
}
}
const toString = (arr: ArrayBuffer) => {
return buffer.from(arr).toString();
}
async function main() {
try {
const bucketName = 'harmonyos-sdk-test-bucket';
const objectName = 'example_dir/example.txt';
const res = await client.getObject({
Bucket: bucketName,
Key: objectName,
});
let allContent = ''
while (true) {
const buf = reader.read(10000);
allContent += toString(buf)
if (buf.byteLength === 0) {
reader.close();
break;
}
}
console.log('object size:', allContent.length);
} catch (error) {
handleError(error);
}
}
main();
tip
Enumeration of Objects
The following code demonstrates how to list objects in a bucket.
import { TosClient, TosClientError, TosServerError } from '@volcengine/tos_harmonyos_sdk';
const client = new TosClient({
accessKeyId: "Provide your ak",
accessKeySecret: "Provide your sk",
securityToken: 'Provide your securityToken',
region: "Provide your region",
endpoint: "Provide your endpoint",
});
function handleError(error: Error) {
if (error instanceof TosClientError) {
console.log('Client Err Msg:', error.message);
console.log('Client Err Stack:', error.stack);
} else if (error instanceof TosServerError) {
console.log('Request ID:', error.requestId);
console.log('Response Status Code:', error.statusCode);
console.log('Response Header:', error.headers);
console.log('Response Err Code:', error.code);
console.log('Response Err Msg:', error.message);
} else {
console.log('unexpected exception, message: ', error);
}
}
async function main() {
try {
const bucketName = 'harmonyos-sdk-test-bucket';
const res = await client.listObjectsType2({
Bucket: bucketName,
MaxKeys: 10,
})
console.log(`listObjectsType2 bucketName: ${bucketName}, len is ${res.Contents.length}`);
} catch (error) {
handleError(error);
}
}
main();
tip
Delete Object
The following code demonstrates how to delete an object from a bucket.
import { TosClient, TosClientError, TosServerError } from '@volcengine/tos_harmonyos_sdk';
const client = new TosClient({
accessKeyId: "Provide your ak",
accessKeySecret: "Provide your sk",
securityToken: 'Provide your securityToken',
region: "Provide your region",
endpoint: "Provide your endpoint",
});
function handleError(error: Error) {
if (error instanceof TosClientError) {
console.log('Client Err Msg:', error.message);
console.log('Client Err Stack:', error.stack);
} else if (error instanceof TosServerError) {
console.log('Request ID:', error.requestId);
console.log('Response Status Code:', error.statusCode);
console.log('Response Header:', error.headers);
console.log('Response Err Code:', error.code);
console.log('Response Err Msg:', error.message);
} else {
console.log('unexpected exception, message: ', error);
}
}
async function main() {
try {
const bucketName = 'harmonyos-sdk-test-bucket';
const objectName = 'delete-object-test';
const res = await client.deleteObject({
Bucket: bucketName,
Key: objectName,
});
console.log(`deleteObject bucketName: ${bucketName} status: ${res3.StatusCode}`);
} catch (error) {
handleError(error);
}
}
main();
tip
Last updated: 2025.09.26 19:05:16
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