Continuing on Mashup Guide :: listing keys with S3Ajax, here I present a Chickenfoot script to create a bucket and upload a file (specifically, it creates a bucket by the name of raymondyeetest and uploads a file (D:\Document\PersonalInfoRemixBook\examples\ch16\Exported Items.rdf from my WinXP machine) to the key exportitems.rdf in the bucket:

include("D:\\document\\JavaScriptLib\\sha1.js");
include("D:\\document\\JavaScriptLib\\S3Ajax.js");

var AWSAccessKeyId = "[AWSAccessKeyId]";
var AWSSecretAccessKey = "[AWSSecretAccessKey]";

S3Ajax.URL = 'http://s3.amazonaws.com';
S3Ajax.DEBUG = true;
S3Ajax.KEY_ID = AWSAccessKeyId;
S3Ajax.SECRET_KEY = AWSSecretAccessKey;

// function to read contents from a file

function read_file_contents(aFileURL) {
  // https://developer.mozilla.org/en/Code_snippets/File_I%2f%2fO#Binary_File

  var ios = Components.classes["@mozilla.org/network/io-service;1"]
                      .getService(Components.interfaces.nsIIOService);
  var url = ios.newURI(aFileURL, null, null);

  if (!url || !url.schemeIs("file")) throw "Expected a file URL.";
  var bFile = url.QueryInterface(Components.interfaces.nsIFileURL).file;
  var istream = Components.classes["@mozilla.org/network/file-input-stream;1"]
                          .createInstance(Components.interfaces.nsIFileInputStream);
  istream.init(bFile, -1, -1, false);
  var bstream = Components.classes["@mozilla.org/binaryinputstream;1"]
                          .createInstance(Components.interfaces.nsIBinaryInputStream);
  bstream.setInputStream(istream);
  var bytes = bstream.readBytes(bstream.available());
  return bytes;

}

// create a bucket

var newBucketName = 'raymondyeetest';

S3Ajax.createBucket(newBucketName, function() {
    output("created a buicket: " + newBucketName);
    s3_list();
}, function () {
      output ("error in createBucket");
   }
);

// add a key to a bucket

var fileURL = 'file:///D:/Document/PersonalInfoRemixBook/examples/ch16/Exported%20Items.rdf'
var content = read_file_contents(fileURL);
alert(content);

S3Ajax.put(newBucketName , "exportitems.rdf", content,
    {
       content_type: "application/xml; charset=UTF-8",
       meta:  {'creator':'Raymond Yee'},
       acl:    "public-read",
    },
    function(req) {
        output("Upload succeeded");
    },
    function(req, obj) {
        output("Upload failed");
    }
);

A few things to note about this code:

• read_file_contents() doesn't strike me as a terribly elegant way of reading contents from a file -- but that's what I have working for now
• a tricky part of getting this to work was to note that in FF 3.x,  charset=UTF-8 is automatically tacked on to content-type HTTP request header in a xmlhttprequest -- I don't know how to change the charset or whether you can -- and why UTF-8 is being tacked on.  But figuring out the charset was crucial to getting this working since the content-type HTTP header is used in the calculation of the Amazon S3 signature.

In a previous post (learning how to use S3Ajax to access Amazon S3), I show how to use Chickenfoot and S3Ajax to list S3 buckets. Here is a slight elaboration of the code to list the keys within buckets (in addition to the buckets):

include("D:\\document\\JavaScriptLib\\sha1.js");
include("D:\\document\\JavaScriptLib\\S3Ajax.js");

var AWSAccessKeyId = "[AWSAccessKeyId]";
var AWSSecretAccessKey = "[AWSSecretAccessKey]";

S3Ajax.DEBUG = true;
S3Ajax.KEY_ID = AWSAccessKeyId;
S3Ajax.SECRET_KEY = AWSSecretAccessKey;

function s3_listKeys(bucket) {
  S3Ajax.listKeys(bucket,null,
    function(req, obj) {
        var contents = obj.ListBucketResult.Contents;
        for (var i=0, item; item=contents[i]; i++) {
           output("key: " + bucket + ": " + item.Key +
            " [" + item.LastModified + '] ' +
             " (" + item.Size + ")");
        }
    },
     function(req,obj) {
        output("s3_listKeys failed at " + (new Date()));
     }
  )
} // s3_listKeys

S3Ajax.listBuckets(
    function(req, obj) {
        if (obj.ListAllMyBucketsResult) {
            var buckets = obj.ListAllMyBucketsResult.Buckets.Bucket;
            for (var i=0, bucket; bucket=buckets[i]; i++) {
              output (
                    "bucket: " + bucket.Name + ' ['+
                      bucket.CreationDate+']'
              );
              s3_listKeys(bucket.Name);
            }
        }
    },
    function(req) {
        output ("Buckets list failed at "+(new Date()));
    }
);

In a previous post ( Amazon S3 signature calculation in JavaScript), I show how to calculate using JavaScript a "signature" need to access Amazon S3. In this post, I show a code snippet for using Leslie Michael Orchard's S3Ajax, which I'm evaluating for using to connect Zotero with Amazon S3. (Like the code from my previous calculation, it too depends on the sha1.js library.). Here's a Chickenfoot script (which is a slight rewriting of a L. M. Orchard's listbuckets function in play.js) to list your S3 buckets (you need to substitute the appropriate key/secret and download S3Ajax.js and sha1.js and substitute the correct path for these libraries):

include("D:\\document\\JavaScriptLib\\sha1.js");
include("D:\\document\\JavaScriptLib\\S3Ajax.js");

var AWSAccessKeyId = "[AWSAccessKeyId]";
var AWSSecretAccessKey = "[AWSSecretAccessKey]";

S3Ajax.DEBUG = true;
S3Ajax.KEY_ID = AWSAccessKeyId;
S3Ajax.SECRET_KEY = AWSSecretAccessKey;

S3Ajax.listBuckets(
    function(req, obj) {
        if (obj.ListAllMyBucketsResult) {
            var buckets = obj.ListAllMyBucketsResult.Buckets.Bucket;
            for (var i=0, bucket; bucket=buckets[i]; i++) {
                output (
                    bucket.Name + ' ['+bucket.CreationDate+']'
                );
            }
        }
    },
    function(req) {
        output ("Buckets list failed at "+(new Date()));
    }
);

I will have to try some more sophisticated actions -- but the simple listing of buckets worked for me.