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HTTPSConnection double wrapping IPv6 address during CONNECT #100985
Description
Bug report
when http.client.HTTPSConnection is used with IPv6 addresses and a proxy results in the "Host:" Header being
wrapped in square brackets twice. (e.g. Host: [[fd2e:6f44:5dd8:c956::15]]:5050 )
$ cat /tmp/proxy_test.py
import http.client, ssl
conn = http.client.HTTPSConnection("fd2e:6f44:5dd8:c956::1", 8215, context=ssl._create_unverified_context())
conn.set_tunnel("[fd2e:6f44:5dd8:c956::15]", 5050)
conn.request("GET", "/", "")
response = conn.getresponse()
print(response.status, response.reason)
$ python3 /tmp/proxy_test.py
400 Bad Request
=== tcp dump showing extra squar brackets in "Host:" header ==
CONNECT [fd2e:6f44:5dd8:c956::15]:5050 HTTP/1.0
HTTP/1.1 200 Connection established
GET / HTTP/1.1
Host: [[fd2e:6f44:5dd8:c956::15]]:5050
Accept-Encoding: identity
Content-Length: 0
HTTP/1.1 400 Bad Request
Date: Thu, 12 Jan 2023 11:47:38 GMT
Server: Apache
Content-Length: 226
Connection: close
Content-Type: text/html; charset=iso-8859-1
Your environment
$ cat /etc/redhat-release
Red Hat Enterprise Linux CoreOS release 4.12
$ rpm -qf /usr/bin/python3
python3-3.9.10-4.el9_0.x86_64
Activity
pythongh-100985: Consistently wrap IPv6 IP address during CONNECT
pythongh-100985: Consistently wrap IPv6 IP address during CONNECT
pythongh-100985: Consistently wrap IPv6 IP address during CONNECT
pythongh-100985: Consistently wrap IPv6 IP address during CONNECT
pythongh-100985: Consistently wrap IPv6 IP address during CONNECT
pythongh-100985: Consistently wrap IPv6 IP address during CONNECT
pythongh-100985: Consistently wrap IPv6 IP address during CONNECT
gh-100985: Consistently wrap IPv6 IP address during CONNECT (GH-100986)
pythongh-100985: Consistently wrap IPv6 IP address during CONNECT (py…
[3.12] gh-100985: Consistently wrap IPv6 IP address during CONNECT (G…
[3.11] pythongh-100985: Consistently wrap IPv6 IP address during CONN…
[3.11] gh-100985: Consistently wrap IPv6 IP address during CONNECT (G…
pythongh-100985: Consistently wrap IPv6 IP address during CONNECT (py…
pythongh-100985: Consistently wrap IPv6 IP address during CONNECT (py…
pythongh-100985: Consistently wrap IPv6 IP address during CONNECT (py…