Not able to pass Bearer token in headers of a GET request in Golang

go, oauth-2.0

Solution

I was able to solve the problem. Actually the problem was two way.

1) The API end point was doing a redirect (302), which was causing a 302 response and then the other API was being called.

2) GO by default does not forward the headers, thus my bearer token was being lost in the middle.

FIX:

I had to override the client's CheckRedirect function and manually pass the headers to the new request.

client.CheckRedirect = checkRedirectFunc

Here is how I forwarded the headers manually.

func checkRedirectFunc(req *http.Request, via []*http.Request) error {
    req.Header.Add("Authorization", via[0].Header.Get("Authorization"))
    return nil
}

Problem

I am using oauth2 to access a third party API. I can get the access token alright, but when I try to call the API by passing the bearer token in the request headers it gives me 401 (Unauthorized) error. Although it works well when I try to do it via POSTMAN by passing headers as (Authorization: Bearer ). But it does not work using go. Here is the code sample. ``` url := "http://api.kounta.com/v1/companies/me.json" var bearer = "Bearer " + <ACCESS TOKEN HERE> req, err := http.NewRequest("GET", url, nil) req.Header.Add("authorization", bearer) client := urlfetch.Client(context) resp, err := client.Do(req) if err != nil { panic(err) } defer resp.Body.Close() body, _ := ioutil.ReadAll(resp.Body) writer.Write([]byte(body)) // Gives 401 Unauthorized error, though same works using POSTMAN ```

Original source