GET /?image-slim HTTP/1.1
Host: <BucketName-APPID>.pic.<Region>.myqcloud.com 
Date: <GMT Date>
Authorization: <Auth String>

<?xml version="1.0" encoding="UTF-8" ?>
<ImageSlim>
    <Status>off</Status>
    <SlimMode>API</SimMode>
    <Suffixs>
        <Suffix>jpg</Suffix>
        <Suffix>png</Suffix>
    </Suffixs>
</ImageSlim>

{
    "ImageSlim":{
        "Status":"on",
        "SlimMode":"Auto",
        "Suffixs":{
            "Suffix":[
                "jpg"
                "png"
            ]
        }
    }
}