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Amudha
Contributor II
Contributor II
‎2023-12-15 10:06 AM

S3 Bucket

Hi I am using the below code in Qliksense mash for access qliksense mashup  getting below error while reloading the app

has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>S3 File Downloader</title>
</head>
<body>
 
<label for="file-list">Select File to Download:</label>
<select id="file-list"></select>
<button onclick="downloadS3File()">Download S3 File</button>
 
<script>
function myFunction() {
  // Initialize AWS SDK
  AWS.config.update({
    accessKeyId: 'Key',
    secretAccessKey: '',
    region: ''
  });
 
  const s3 = new AWS.S3();
 
  // Fetch file list from S3 and populate dropdown
  s3.listObjectsV2({ Bucket: 'Bucketname' }, (err, data) => {
    if (err) {
      console.error(err);
    } else {
      const fileList = document.getElementById('file-list');
      data.Contents.forEach(file => {
        const option = document.createElement('option');
        option.value = file.Key;
        option.textContent = file.Key;
        fileList.appendChild(option);
      });
    }
  });
 
  // Function to download S3 file dynamically
  function downloadS3File() {
    const selectedFile = document.getElementById('file-list').value;
 
    if (!selectedFile) {
      console.error('Please select a file to download.');
      return;
    }
 
    const params = {
      Bucket: 'Bucket-Name',
      Key: selectedFile
    };
 
    s3.getObject(params, (err, data) => {
      if (err) {
        console.error(err);
      } else {
        const blob = new Blob([data.Body], { type: data.ContentType });
        const link = document.createElement('a');
        link.href = URL.createObjectURL(blob);
        link.download = ${selectedFile.split('/').pop()}.xlsx; // Adjust the downloaded file name
        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
      }
    });
console.log();
  }
 
</script>
 
</body>
</html>
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anat
Master
Master
‎2023-12-27 11:15 AM

may be below links will help you to debug your error.

https://community.qlik.com/t5/Official-Support-Articles/Qlik-Sense-Response-to-preflight-request-doe...

https://community.qlik.com/t5/Official-Support-Articles/Mixed-Content-and-CORS-error-for-Access-Cont...

 

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