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node.js Amazon s3 how to check file exists

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DreamCoder answered on March 16, 2021 Popularity 5/10 Helpfulness 2/10

answer node.js Amazon s3 how to check file exists

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node.js Amazon s3 how to check file exists

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import Promise from 'bluebird'
import AWS from 'aws-sdk'

AWS.config.accessKeyId = Config.Credentials.AWS.accessKeyId
AWS.config.secretAccessKey = Config.Credentials.AWS.secretAccessKey

const s3 = new AWS.S3
Promise.promisifyAll(s3)

const getFileFromS3 = async ({ Bucket, Key })=> {
  try {
    const result = await S3.headObjectAsync({ Bucket, Key })
    console.log(result)
    /* Output:
      { AcceptRanges: 'bytes',
          LastModified: 'Mon, 16 Jan 2017 07:30:19 GMT',
          ContentLength: '6',
          ETag: '"b1946ac92492d2347c6235b4d2611184"',
          ContentType: 'text/plain',
          Metadata: {} }
    */
  } catch (error) {
    if (error.statusCode === 404) console.log('File Not Found')
    console.error('Unexpected Error', error)
  }
}

Popularity 5/10 Helpfulness 2/10 Language javascript

Source: stackoverflow.com

Tags: amazon-s3 file-exists javascript node.js

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Contributed on Oct 22 2022

DreamCoder

0 Answers Avg Quality 2/10

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node js s3 chack file exists

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// Using callbacks
s3.headObject(params, function (err, metadata) {  
  if (err && err.name === 'NotFound') {  
    // Handle no object on cloud here  
  } else if (err) {
    // Handle other errors here....
  } else {  
    s3.getSignedUrl('getObject', params, callback);  
    // Do stuff with signedUrl
  }
});

// Using async/await
try {
  await s3.headObject(params).promise();
  const signedUrl = s3.getSignedUrl('getObject', params);
  // Do stuff with signedUrl
} catch (error) {
  if (error.name === 'NotFound') { // Note with v3 AWS-SDK use error.code
    // Handle no object on cloud here...
  } else {
    // Handle other errors here....
  }
}

Popularity 7/10 Helpfulness 4/10 Language javascript

Source: stackoverflow.com

Tags: file-exists javascript ja

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Contributed on Oct 16 2022

DreamCoder

0 Answers Avg Quality 2/10

node js s3 chack file exists

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const exists = await s3
  .headObject({
    Bucket: S3_BUCKET_NAME,
    Key: s3Key,
  })
  .promise()
  .then(
    () => true,
    err => {
      if (err.code === 'NotFound') {
        return false;
      }
      throw err;
    }
  );

Popularity 5/10 Helpfulness 2/10 Language javascript

Source: stackoverflow.com

Tags: file-exists javascript

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Contributed on Oct 16 2022

DreamCoder

0 Answers Avg Quality 2/10

aws s3 check if file exists

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Last time I saw performance comparisons getObjectMetadata was the fastest way to check if an object exists. Using the AWS cli that would be the head-object method, example:

aws s3api head-object --bucket www.codeengine.com --key index.html
which returns:

{
    "AcceptRanges": "bytes",
    "ContentType": "text/html; charset=utf-8",
    "LastModified": "Sun, 08 Jan 2017 22:49:19 GMT",
    "ContentLength": 38106,
    "ContentEncoding": "gzip",
    "ETag": "\"bda80810592763dcaa8627d44c2bf8bb\"",
    "StorageClass": "REDUCED_REDUNDANCY",
    "CacheControl": "no-cache, no-store",
    "Metadata": {}
}

Popularity 9/10 Helpfulness 2/10 Language whatever

Source: Grepper

Tags: file-exists file

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Contributed on Mar 16 2021

Santino

0 Answers Avg Quality 2/10

node.js Amazon s3 how to check file exists

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