title: Nodejs AWS SDK S3 Generate Presigned URL
body: <p>I am using the NodeJS AWS SDK to generate a presigned S3 URL. The docs give an <a href="https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3.html#getSignedUrl-property" rel="noreferrer">example of generating a presigned URL</a>.</p>
  
  <p>Here is my exact code (with sensitive info omitted):</p>
  
  <pre><code>const AWS = require('aws-sdk')
  
  const s3 = new AWS.S3()
  AWS.config.update({accessKeyId: 'id-omitted', secretAccessKey: 'key-omitted'})
  
  // Tried with and without this. Since s3 is not region-specific, I don't
  // think it should be necessary.
  // AWS.config.update({region: 'us-west-2'})
  
  const myBucket = 'bucket-name'
  const myKey = 'file-name.pdf'
  const signedUrlExpireSeconds = 60 * 5
  
  const url = s3.getSignedUrl('getObject', {
      Bucket: myBucket,
      Key: myKey,
      Expires: signedUrlExpireSeconds
  })
  
  console.log(url)
  </code></pre>
  
  <p>The URL that generates looks like this:</p>
  
  <pre><code>https://bucket-name.s3-us-west-2.amazonaws.com/file-name.pdf?AWSAccessKeyId=[access-key-omitted]&amp;Expires=1470666057&amp;Signature=[signature-omitted]
  </code></pre>
  
  <p>I am copying that URL into my browser and getting the following response:</p>
  
  <pre><code>&lt;Error&gt;
    &lt;Code&gt;NoSuchBucket&lt;/Code&gt;
    &lt;Message&gt;The specified bucket does not exist&lt;/Message&gt;
    &lt;BucketName&gt;[bucket-name-omitted]&lt;/BucketName&gt;
    &lt;RequestId&gt;D1A358D276305A5C&lt;/RequestId&gt;
    &lt;HostId&gt;
      bz2OxmZcEM2173kXEDbKIZrlX508qSv+CVydHz3w6FFPFwC0CtaCa/TqDQYDmHQdI1oMlc07wWk=
    &lt;/HostId&gt;
  &lt;/Error&gt;
  </code></pre>
  
  <p>I know the bucket exists. When I navigate to this item via the AWS Web GUI and double click on it, it opens the object with URL and works just fine:</p>
  
  <pre><code>https://s3-us-west-2.amazonaws.com/[bucket-name-omitted]/[file-name-omitted].pdf?X-Amz-Date=20160808T141832Z&amp;X-Amz-Expires=300&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Signature=[signature-omitted]&amp;X-Amz-Credential=ASIAJKXDBR5CW3XXF5VQ/20160808/us-west-2/s3/aws4_request&amp;X-Amz-SignedHeaders=Host&amp;x-amz-security-token=[really-long-key]
  </code></pre>
  
  <p>So I am led to believe that I must be doing something wrong with how I'm using the SDK.</p>