How to get HTTP error stream using Python requests library?

Question

How do I access the error stream using the Python requests library? For example, using HttpURLConnection in Java, I would do something like:

InputStream errorStream = conn.getErrorStream();

Is there a function like this with requests?
I'm looking for the error message in the response that was supplied by the source, NOT the error status e.g. Internal Server Error

Well, in Java calling getInputStream, which gets the response content, would throw an exception if the response code was an error response. In that situation you'd have to call getErrorStream. Are you saying that requests treats them both the same? So calling response.text will give me whatever is available? — RTF
– RTF, Commented Oct 13, 2017 at 11:51

t.m.adam · Accepted Answer · 2017-10-13 11:58:28Z

1

requests won't raise an exception if HTTP error occurs, but you can get the error message in the response content. Example:

url = 'https://stackoverflow.com/does_not_exist'
r = requests.get(url)
print(r.status_code, r.reason)
print(r.text)

answered Oct 13, 2017 at 11:58

t.m.adam

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2 Comments

RTF Over a year ago

I'd misunderstood HTTP responses in general. I thought error responses were set in a separate part of the raw response, but presumably the Java example I posted forces you to call getErrorStream to make sure you know you're retrieving an error response, to prevent accidentally calling getInputStream thinking your response is good.

t.m.adam Over a year ago

You can raise HTTPError exceptions if you want with raise_for_status()

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