What are possible golang http response errors?

Question

As in many golang net/http articles, a request returns two values: response and error:

resp, err := http.Get("http://example.com/")
if err != nil {
    // handle error
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)

For http-related errors, it will be returned in resp with status code like 502, 400 etc. What are the possible errors returned? I need to know them before I can handle them.

@Marty I did not mean status code error, because they are returned in resp, I want to know that is returned as err in the first line of above code. — cizixs
– cizixs, Commented Nov 29, 2016 at 3:39
I was looking for this same question bur instead got an question which had 5 down votes and closed. Thanks @cizixs for asking this question. — DevX
– DevX, Commented Jun 22, 2018 at 12:23

Larry.Z · Accepted Answer · 2016-11-29 03:33:30Z

7

URL parse error
too much redirect times
tcp connect\write\read timeout
302 status, but null Location header

and so on

You can read the source code in http package. Then you can find all the errors returned by this function http.Get.

edited Nov 29, 2016 at 3:33

answered Nov 29, 2016 at 3:26

Larry.Z

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nu11p01n73R · Accepted Answer · 2016-11-29 03:24:35Z

0

Those errors will mostly network related errors, like network timeouts etc. There is no need to handle them differently. You may exit gracefully like,

resp, err := http.Get("http://google.com/")
    if err != nil {
        fmt.Println(err.Error())
        os.Exit(1)
}

answered Nov 29, 2016 at 3:24

nu11p01n73R

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Comments

Rajeev Paul · Accepted Answer · 2016-11-29 12:58:52Z

-1

there are many error responses like :-

301 (Moved Permanently)
302 (Found)
303 (See Other)
307 (Temporary Redirect)

better you go and read http.Get

answered Nov 29, 2016 at 12:58

Rajeev Paul

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