Torch Object Storage
Torch Object Storage
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- Documentation
Torch Object StorageSDK ReferenceNode.jsObject InterfaceUpload objectUpload Callback (Node.js SDK)
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Download PDFUpload object
Upload Callback (Node.js SDK)
Copy pageDownload PDFUpload Callback (Node.js SDK)
Upload callback means that the client side carries the callback (Callback) parameter when the request is made. After the upload is completed, the server level sends a synchronized POST callback request to the third-party app server specified in CallBack. After the server confirms acceptance and returns the result, all the results are returned to the client side.
Sample code
Normal upload realizes upload callback
// Import SDK, if the TOS Node.JS SDK version is less than 2.5.2, please change "TosClient" to "TOS" in the code below.
import { TosClient, TosClientError, TosServerError } from '@volcengine/tos-sdk';
// Create a client.
const client = new TosClient({
accessKeyId: process.env['TOS_ACCESS_KEY'],
accessKeySecret: process.env['TOS_SECRET_KEY'],
region: "Provide your region", // Fill in the region where the Bucket is located. For example, if it is in China North 2 (Beijing), fill in "Provide your region" as cn-beijing.
endpoint: "Provide your endpoint", // Enter the domain address.
});
function handleError(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 bucketName = 'node-sdk-test-bucket';
async function main() {
try {
const callbackUrl = '*** Provide your callback url ***';
const objectKey = '*** Provide your object key ***';
// Set upload callback parameters
// The callback parameter can be set according to the requirement
const callback = `
{
"callbackUrl" : "${callbackUrl}",
"callbackBody" : ${'"{\\"bucket\\": ${bucket}, \\"object\\": ${object}, \\"key1\\": ${x:key1}}"'},
"callbackBodyType" : "application/json"
}`;
// Configure related variable parameters.
const callbackVar = `
{
"x:key1" : "ceshi"
}`;
const { requestId: putObjectRequestId } = await client.putObject({
bucket: bucketName,
key: objectKey,
body: Buffer.from('object content'),
callback: Buffer.from(callback).toString('base64'),
callbackVar: Buffer.from(callbackVar).toString('base64'),
});
console.log('putObject Request ID: ', putObjectRequestId);
} catch (error) {
handleError(error);
}
}
main();
Shard upload to achieve upload callback
// Import SDK, if the TOS Node.JS SDK version is less than 2.5.2, please change "TosClient" to "TOS" in the code below.
import { TosClient, TosClientError, TosServerError } from '@volcengine/tos-sdk';
import fsp from 'fs/promises';
// Create a client.
const client = new TosClient({
accessKeyId: process.env['TOS_ACCESS_KEY'],
accessKeySecret: process.env['TOS_SECRET_KEY'],
region: "Provide your region", // Fill in the region where the Bucket is located. For example, if it is in China North 2 (Beijing), fill in "Provide your region" as cn-beijing.
endpoint: "Provide your endpoint", // Enter the domain address.
});
function handleError(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 = 'node-sdk-test-bucket';
// The multipartExample file in the local example_dir folder.
const filePath = './example_dir/multipartExample';
const callbackUrl = '*** Provide your callback url ***';
const objectKey = '*** Provide your object key ***';
// Set upload callback parameters
// The callback parameters can be set according to the requirements.
const callback = `
{
"callbackUrl" : "${callbackUrl}",
"callbackBody" : ${'"{\\"bucket\\": ${bucket}, \\"object\\": ${object}, \\"key1\\": ${x:key1}}"'},
"callbackBodyType" : "application/json"
}`;
// Configure related variable parameters.
const callbackVar = `
{
"x:key1" : "ceshi"
}`;
// Get Upload Task ID
const {
data: { UploadId },
} = await client.createMultipartUpload({
bucket: bucketName,
key: objectKey,
});
console.log('UploadId', UploadId);
// Get local file information and prepare for segmentation
const stats = await fsp.stat(filePath);
// Total file size
const totalSize = stats.size;
let offset = 0;
let partNumber = 1;
const partsInfo = [];
// Specify chunk size during upload.
const partSize = 5 * 1024 * 1024;
while (offset < totalSize) {
const uploadResult = await client.uploadPartFromFile({
bucket: bucketName,
key: objectKey,
filePath,
partNumber,
uploadId: UploadId,
offset,
partSize,
});
const eTag = uploadResult.data.ETag;
console.log(`partNumber${partNumber} Etag:`, eTag);
partsInfo.push({
partNumber,
eTag,
});
partNumber++;
offset += partSize;
}
console.log('parts information', partsInfo);
// Complete chunked upload.
const { data, requestId: completeMultipartUploadRequestId } = await client.completeMultipartUpload({
bucket: bucketName,
key: objectKey,
uploadId: UploadId,
parts: partsInfo,
callback: Buffer.from(callback).toString('base64'),
callbackVar: Buffer.from(callbackVar).toString('base64'),
});
console.log('completeMultipartUpload Request ID: ', completeMultipartUploadRequestId);
console.log('result data:', data);
} catch (error) {
handleError(error);
}
}
main();
Last updated: 2025.09.22 18:35:47
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