Chunking enabled throw me SignatureDoesNotMatch?

[despotbg]

Everything works fine until I turn on chunking. But when chunking is turned on, I get signature matching problem
This is how my CORS configuration looks like on S3
<?xml version="1.0" encoding="UTF-8"?> <CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <CORSRule> <AllowedOrigin>*</AllowedOrigin> <AllowedMethod>GET</AllowedMethod> <AllowedMethod>POST</AllowedMethod> <AllowedMethod>PUT</AllowedMethod> <AllowedMethod>DELETE</AllowedMethod> <MaxAgeSeconds>3000</MaxAgeSeconds> <ExposeHeader>ETag</ExposeHeader> <AllowedHeader>*</AllowedHeader> </CORSRule> </CORSConfiguration>
And this is how I initialize fine uplaoder

request: {
        endpoint: '{!! $upload->getS3BucketUrl() !!}',
        accessKey: '{!! $upload->getAccessKey() !!}',
},
signature: {
        endpoint: '/uploader',
        version: 4
},
objectProperties: {
        region: 'us-east-2',
        key: function (fileId) {
             return '{!! $user->getId() !!}/' + $("#fineUploader").fineUploader("getName",fileId);
        }
},
chunking: {
       enabled: true
}

Still I get response
<Code>SignatureDoesNotMatch</Code><Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message>

[despotbg]

I found mistake. I investigated S3 response. And there they return this

<CanonicalRequest>
POST
//8a855b73-0b37-413a-aa3c-c74b48e32fb4/fronalpstockbig.jpg
uploads=
host:xyz.s3-us-east-2.amazonaws.com
x-amz-acl:private
x-amz-content-sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b854
x-amz-date:20170823T195258Z
x-amz-meta-qqfilename:fronalpstockbig.jpg

host;x-amz-acl;x-amz-content-sha256;x-amz-date;x-amz-meta-qqfilename
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b854</CanonicalRequest>

while in function signV4RestRequest inside $matches[3] I have

POST
/8a855b73-0b37-413a-aa3c-c74b48e32fb4/fronalpstockbig.jpg
uploads=
host:xyz.s3-us-east-2.amazonaws.com/
x-amz-acl:private
x-amz-content-sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b854
x-amz-date:20170823T195258Z
x-amz-meta-qqfilename:fronalpstockbig.jpg

host;x-amz-acl;x-amz-content-sha256;x-amz-date;x-amz-meta-qqfilename
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b854

Note that $matches[3] have just one "/" after POST, and have "/" after amazonaws.com
I solve this by adding next three lines

preg_match($pattern, $rawStringToSign, $matches);
$matches[3] = str_replace('amazonaws.com/', 'amazonaws.com', $matches[3]); // THIS LINE ADDED
$matches[3] = str_replace("POST\n/", "POST\n//", $matches[3]); // THIS LINE ADDED
$matches[3] = str_replace("PUT\n/", "PUT\n//", $matches[3]); // THIS LINE ADDED
$hashedCanonicalRequest = hash('sha256', $matches[3]);