httr GET hanging with no response

[gmccomas]

I've created a httr::GET request that is proving very hard to troubleshoot because the host just hangs forever so I've included a timeout to force it to stop after 10 seconds. I was getting the same behavior in python using requests until I added a 'user-agent' header, but changing the user-agent in httr::GET does not yield the same result.

Here is the R code that doesn't generate a response (times out after 10 seconds so that user isn't sitting around forever)

library(httr)

resp <- GET(
    url = "https://www.cmegroup.com/",
    user_agent('Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36'),
    timeout(10),
    verbose()
)

print(resp)

Here is the python code that yields a response immediately

import requests as r

resp = r.get(
    "https://www.cmegroup.com/",
    headers = {'user-agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36'},
    timeout = 10
)

resp.status_code

print(len(resp.content))