I'm have taken code from http://as3awss3lib.googlecode.com/svn/trunk to upload files into amazon s3 using flex web app.
Below is the code for that,
private function getURLRequest(method:String, resource:String, contentType:String = null, hash:String = null, secure:Boolean = true):URLRequest
{
var protocol:String = (secure) ? "https" : "http";
var req:URLRequest = new URLRequest(protocol + "://" + AMAZON_ENDPOINT + resource);
/*req.cacheResponse = false;
req.useCache = false;*/
req.method = method;
var dateString:String = getDateString(new Date());
var dateHeader:URLRequestHeader = new URLRequestHeader("Date", dateString);
var authHeader:URLRequestHeader = new URLRequestHeader("Authorization", getAuthenticationHeader(method, dateString, resource, contentType, hash));
req.requestHeaders.push(dateHeader);
req.requestHeaders.push(authHeader);
return req;
}
private function getAuthenticationHeader(verb:String,
dateString:String,
resource:String,
contentType:String = null,
hash:String = null):String
{
return ("AWS " + this.accessKey + ":" + getAuthenticationString(verb, dateString, resource, contentType, hash));
}
private function getAuthenticationString(verb:String,
dateString:String,
resource:String,
contentType:String = null,
hash:String = null):String
{
var toSign:String = verb + "\n";
toSign += (hash != null) ? hash + "\n" : "\n";
toSign += (contentType != null) ? contentType + "\n" : "\n";
toSign += dateString + "\n" + resource;
var toSignBytes:ByteArray = new ByteArray();
toSignBytes.writeUTFBytes(toSign);
var hmacBytes:ByteArray = hmac.compute(secretAccessKeyBytes, toSignBytes);
return Base64.encodeByteArray(hmacBytes);
}
