{http.request.remote.host} is empty when "Early-Data": "1" #6936
Description
I use Caddy as a proxy where "X-Real-IP" header is set to {http.request.remote.host}. When I see "Early-Data": "1" header present the "X-Real-IP" header becomes an empty string. I think it happens only with HTTP/3. In the same time, X-Forwarded-For still has valid IP address.
Caddy version: 2.9.1
Tested on latest chrome 135.0.7049.42.
Python script as a proxied app to reproduce the issue:
#!/usr/bin/env python3
import http.server
import json
import socketserver
class RequestHandler(http.server.BaseHTTPRequestHandler):
def do_GET(self):
self.send_response(200)
self.send_header("Content-type", "text/plain")
self.end_headers()
self.wfile.write(json.dumps(dict(self.headers), indent=4).encode())
if __name__ == "__main__":
PORT = 8000
with socketserver.TCPServer(("", PORT), RequestHandler) as httpd:
try:
httpd.serve_forever()
except KeyboardInterrupt:
passMinimal caddy config to reproduce the issue:
{
"apps": {
"http": {
"servers": {
"public": {
"listen": [":443"],
"protocols": ["h3"],
"routes": [
{
"match": [
{
"host": ["example.com"]
}
],
"handle": [
{
"handler": "reverse_proxy",
"upstreams": [
{
"dial": "127.0.0.1:8000"
}
],
"headers": {
"request": {
"set": {
"X-Real-IP": ["{http.request.remote.host}"]
}
}
}
}
],
"terminal": true
}
]
}
}
}
}
}