Gets or sets a value indicating whether uploaded files should be checked for integrity or not.
var u = $au.imageUploaderFlash({
//...other params...
});
var as3 = $au.amazonS3Extender(u);
as3.checkIntegrity(false);
//...other params...
u.writeHtml();
Type: Boolean
If true, each file will be uploaded along with its MD5 hash, so Amazon S3 can validate uploaded file before storing it. Otherwise, no hash values will be sent.
Default value is false.
If you enabled integrity checking, you should add hash field to the policy:
public string ConstructPolicy()
{
StringBuilder policy = new StringBuilder();
DateTime expDate = DateTime.Now.ToUniversalTime().AddSeconds(6000);
policy.AppendLine("{ \"expiration\": \"" + expDate.ToString("s") + ".000Z\"");
policy.AppendLine(", \"conditions\": [");
policy.AppendLine(" {\"acl\": \"public-read\" }");
policy.AppendLine(" , {\"bucket\": \"" + _bucket + "\" }");
policy.AppendLine(" , {\"success_action_status\": \"200\"}");
policy.AppendLine(" , [\"starts-with\", \"$key\", \"\"]");
//Add hash field to the policy
policy.AppendLine(" , [\"starts-with\", \"$Content-MD5\", \"\"]");
policy.AppendLine("]");
policy.AppendLine("}");
// Encode the policy using UTF-8.
byte[] bytes = Encoding.UTF8.GetBytes(policy.ToString());
// Encode those UTF-8 bytes using Base64.
return Convert.ToBase64String(bytes);
}