In what circumstances does the err parameter get set on a request's callback function?

[behrangsa]

Hi,

In this example from the README file:

request('http://www.google.com', function (error, response, body) {
  if (!error && response.statusCode == 200) {
    console.log(body) // Show the HTML for the Google homepage.
  }
})

In what circumstances does error get set? Looks like 4xx and 5xx responses leave error as null.

[simov]

Check out here #1558

[stale]

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