[Python] Unable to post large file with python requests library

I try to post large file and read response as streaming with requests python library.

I have to send a large text file (2 million lines of log ) and receive response back as streaming. If I did by small batch (30 thousands lines), it is ok , I get immediate stream response. For large file, nothing happens and it is finished by a timeout if I specify a timeout (without timeout it is hanging indefinitely).

import requests

url='http://********:59599'
header = {'specific-app-header':'01-fr-open-edition-03'}

def post(file_path):
with open(file_path, "rb") as f:
r = requests.post(
url, headers=header, data=f, stream=True, proxies=None, timeout=180
)
for line in r.iter_lines(decode_unicode=True):
print(line)

post('/tmp/30_000_lines.log')
# .... lines is display
post('/tmp/2_000_000_lines.log')
# ... requests.exceptions.ConnectionError: ('Connection aborted.', TimeoutError('timed out'))


My configuration is:

$python -m requests.help
{
"implementation": {
"name": "CPython",
"version": "3.11.2"
},
"platform": {
"release": "6.1.0-31-amd64",
"system": "Linux"
},
"requests": {
"version": "2.32.3"
},
"urllib3": {
"version": "2.3.0"
},
.....
}

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