Uploading release asset to Github is corrupting file - python-requests

Question

I am trying to automate our Github release process, and as part of it I am uploading release artifacts to Github release. Artifact I am uploading is a tar.gz file. I am using following python3.7 code to upload the artifact:
with open(filepath, 'rb') as file:
response = self._request_session.post(endpoint,
params={'name': local_artifact.filename},
files={local_artifact.filename: file})
Response status code I am getting is 201, which is expected as per Github upload release asset api documentation.
However, when I am downloading artifacts from Github, I am neither able to validate sha256 of the file, nor I am able open the tarball. On running tar -zxvf test.tar.gz I am getting following error:
tar: Unrecognized archive format
tar: Error exit delayed from previous errors.
I have already tested the file on local which I am uploading and that is working fine.
Can anyone please help me in identifying the problem here?
Here is response text I get after uploading file:
{
"url":"https://api.github.com/repos/c2tarun/upload_test_repo/releases/assets/17244134",
"id":17244134,
"node_id":"MDEyOlJlbGVhc2VBc3NldDE3MjQ0MTM0",
"name":"test.tar.gz",
"label":"",
"uploader":{
"login":"c2tarun",
"id":1129670,
...truncating for readability.
"type":"User",
"site_admin":false
},
"content_type":"multipart/form-data; boundary=1a13638ee5f5f57d303508eea4e64211",
"state":"uploaded",
"size":11969682,
"download_count":0,
"created_at":"2020-01-09T23:49:54Z",
"updated_at":"2020-01-09T23:50:18Z",
"browser_download_url":"https://github.com/c2tarun/upload_test_repo/releases/download/untagged-1baa5c7dd7f5a8d506cc/test.tar.gz"
}
Interesting update: Uploading same file multiple times, gives me different sha on downloading.
More Update: I thought that may be I am providing wrong Content-Type header for tar.gz file, so I created a zip file and used Content-Type as application/zip. I am still seeing same issue. Here are my request headers for zip file:
{
'User-Agent':'python-requests/2.22.0',
'Accept-Encoding':'gzip, deflate',
'Accept':'*/*',
'Connection':'keep-alive',
'Content-Type':'application/zip',
'Content-Length':'332',
'Authorization':'Basic xxxxxxxxx'
}
Thanks

Answer 1

You should set the Content-Type is 'application/tar+gzip' or debug with
file --mime-type -b test.tar.gz
command.