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JavaScript is good alternative to bypass AWS bucket policies 
<%@ include file="config.jsp" %> <%@page import="java.util.Calendar"%> <%@page import="java.util.Date"%> <%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head> <title>S3 Upload - JSP Demo</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <script src="sha1.js"></script> <script src="webtoolkit.base64.js"></script> <script src="script.js"></script> <script> function uploadS3() { var awsid = '<%=awsAccessKey %>'; var awskey = '<%=awsSecretKey %>'; var fileField = document.getElementById("file").value; var policyText = '{"expiration": "2015-01-01T12:00:00.000Z","conditions": [{"bucket": "<%=bucket %>" },{"acl": "<%=acl %>" },["eq", "$key", "'+fileField+'"],["starts-with", "$Content-Type", "text/"],]}'; var policyBase64 = Base64.encode(policyText); var signature = b64_hmac_sha1(awskey, policyBase64); document.getElementById("policy").value = policyBase64; document.getElementById("signature").value = signature; document.getElementById("key").value = fileField; //document.getElementById("postform").submit(); document.getElementById("result").innerHTML = '<a href="http://s3.amazonaws.com/<%=bucket %>/'+fileField+'">http://s3.amazonaws.com/<%=bucket %>/'+fileField+'</a>'; } </script> </head><body> <strong>Uploading to Amazon S3</strong> <div class="main"> <p> <form id="postform" action="http://s3.amazonaws.com/<%=bucket %>" method="post" onsubmit="return uploadS3();" enctype="multipart/form-data"> <input type="hidden" name="key" id="key" value="" /> <input type="hidden" name="acl" id="acl" value="<%=acl %>" /> <input type="hidden" name="content-type" id="content-type" value="text/plain" /> <input type="hidden" name="AWSAccessKeyId" id="AWSAccessKeyId" value="<%=awsAccessKey %>" /> <input type="hidden" name="policy" id="policy" value="" /> <input type="hidden" name="signature" id="signature" value="" /> <input name="file" id="file" type="file" /> <input name="submit" value="Upload" type="submit" /> </form> <div id="result"></div> </p> </div> </body></html>
PHP based S3 Upload Tool: http://svnlabs.com/demo/s3/
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Priya Panigrahy
