Failed multi-part uploads to GCS over S3

[cyberduck]

f74c87d created the issue

Hi team,

It appears there is a persistent issue with multipart uploads when S3 protocol is used to access Google Cloud Storage. This was detected with version 7.7.2, but still present with update to 7.8.1.

There are some cases where one would prefer this method over actual GCS protocol (i.e. when only authentication method is HMAC), and this did work in older versions like 7.0.1.

I am attaching a screenshot with error log output, but it should be pretty simple to replicate.

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Attachments

• download.png (56.4 KiB)

[cyberduck]

@dkocher commented

Root cause is HTTP/1.1 400 Bad Request with error Invalid argument. POST object expects Content-Type multipart/form-data..

HTTP/1.1 400 Bad Request
X-GUploader-UploadID: ABg5-UwDlntPOW7i23FW4f7a-Syk1tRCJdaNE6ic4ydHdRXVVbyqn01uLoyX8fgJ8YtUOfAlhYxAtfm0M99QXn1g36d556dfuQ
Content-Type: application/xml; charset=UTF-8
Content-Length: 188
Vary: Origin
Date: Mon, 18 Jan 2021 20:12:23 GMT
Server: UploadServer
Alt-Svc: h3-29=":443"; ma=2592000,h3-T051=":443"; ma=2592000,h3-Q050=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"

<?xml version='1.0' encoding='UTF-8'?><Error><Code>InvalidArgument</Code><Message>Invalid argument.</Message><Details>POST object expects Content-Type multipart/form-data</Details></Error>

[cyberduck]

@dkocher commented

In 8e3c45f.