如何使用 urllib3 捕获 http 错误 404？

Question

What I'm trying to do

I'm requesting a file from an API. If the file does't exist, I get a 404.

What I tried

I'm trying to handle this, using urllib3 .

I found a lot of great, but outdated (~10 years old), documentation how to do this with with urllib and urllib2 .

How does this work in urllib3 ?

All I found in their docs was this

try:
    http.request('GET', 'nx.example.com', retries=False)
except urllib3.exceptions.NewConnectionError:
    print('Connection failed.')

Answer 1

You can simply look at the status code:

import urllib3

http = urllib3.PoolManager()
r = http.request("GET", "httpbin.org/status/404")
if r.status == 404:
    print("404!")