The Get Picture Information function can obtain the basic information of the picture, including the length, width, size and format of the picture. If the image contains Exif information, the content is returned in JSON format. This article describes how to obtain image information through the TOS Node.js SDK.

Sample code

The following code shows how to obtain image information.

// 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 {​
    // Image Name​
    const imageKey = 'image.png';​
​
    const style = 'image/info'; /* Get image metadata. */​
    const { data, requestId, headers } = await client.getObjectV2({​
      bucket: bucketName,​
      key: imageKey,​
      dataType: 'buffer',​
      process: style,​
    });​
    console.log('getObjectV2 Request ID: ', requestId);​
    console.log('ContentType: ', headers['content-type']);​
​
    const info = JSON.parse(data.content.toString());​
    console.log('Format: ', info.Format.value);​
    console.log('ImageWidth: ', info.ImageWidth.value);​
    console.log('ImageHeight: ', info.ImageHeight.value);​
    console.log('FileSize: ', info.FileSize.value);​
  } catch (error) {​
    handleError(error);​
  }​
}​
​
main();​