aws-sdk s3 upoad code example

Example: ajavascriot sdk s3

/* The following example list two objects in a bucket. */

 var params = {
  Bucket: "examplebucket", 
  MaxKeys: 2
 };
 s3.listObjects(params, function(err, data) {
   if (err) console.log(err, err.stack); // an error occurred
   else     console.log(data);           // successful response
   /*
   data = {
    Contents: [
       {
      ETag: "\"70ee1738b6b21e2c8a43f3a5ab0eee71\"", 
      Key: "example1.jpg", 
      LastModified: <Date Representation>, 
      Owner: {
       DisplayName: "myname", 
       ID: "12345example25102679df27bb0ae12b3f85be6f290b936c4393484be31bebcc"
      }, 
      Size: 11, 
      StorageClass: "STANDARD"
     }, 
       {
      ETag: "\"9c8af9a76df052144598c115ef33e511\"", 
      Key: "example2.jpg", 
      LastModified: <Date Representation>, 
      Owner: {
       DisplayName: "myname", 
       ID: "12345example25102679df27bb0ae12b3f85be6f290b936c4393484be31bebcc"
      }, 
      Size: 713193, 
      StorageClass: "STANDARD"
     }
    ], 
    NextMarker: "eyJNYXJrZXIiOiBudWxsLCAiYm90b190cnVuY2F0ZV9hbW91bnQiOiAyfQ=="
   }
   */
 });