fu-s3-blog-policy2.txt

{
    //always included
    "expiration": //the expiration date of the policy, set to be 5 minutes from now, in <a href="http://www.w3.org/TR/NOTE-datetime">ISO 8601 format</a>,

    "conditions":
    [
        //always included
        {"acl": /*the "canned acl" value, specified in the objectProperties.acl option*/},

        //always included
        {"bucket": /*the name of the S3 bucket where this file will be sent*/},

        //not included in IE9 and older or Android 2.3.x and older
        {"Content-Type": /*MIME-type of the associated file, as determined by simple extension checking client-side*/},

        //not included in IE9 and older or Android 2.3.x and older
        {"success_action_status": "200" /*expected HTTP status code for the response from S3 is the upload was successful*/},

        //ONLY included in IE9 and older or Android 2.3.x and older
        {"success_action_redirect": /*corresponds to an absolute path based on the iframeSupport.localBlankPagePath*/},

        //always included
        {"key": /*key name for the associated file*/},

        //always included
        {"x-amz-meta-qqfilename": /*url-encoded filename*/},

        //not included in IE9 and older, Android 2.x.3 and older, or if no size validation options are set
        ["content-length-range", /*min file size ("0" if not specified)*/, /*max file size ("9007199254740992" if not specified)*/]
    ]
}