Can fetch Jira API from Terminal, but fail via Google Apps Script

[Michael Rätzsch]

We run a self-hosted Jira-Environment and set up OAUth Access to use the REST API.

I am able to fetch any API Call via Terminal (cURL) but fail each time i will try to fetch via Google Apps Script.

I guess that there is only one simple little detail missing, but i cant find it. :(

This is my cURL Call:

curl -D- -X GET -H "Authorization: Basic BASE64encoded_username:passwd" -H "Content-Type: application/json" "https://JIRA-DOMAIN.de/rest/api/2/issue/ISSUE-ID"

 And this is how i would like to fetch it via Google Apps Script: 

function getAPIFeedback() {
  var header_options = {
                       'method':'get', 
                       'headers':{
                                 'Authorization':'Basic BASE64encoded_username:passwd',
                                 'Content-Type':'application/json;charset=UTF-8' 
                                 } 
                       };

try{
 var response = UrlFetchApp.fetch('https://JIRA-DOMAIN.de/rest/api/2/issue/ISSUE-ID', header_options);
 Logger.log(response);
 }catch(err){Logger.log(err)}
}

Each time I get a 401 Error, and dont understand why.

I would be very happy if someone could help me.

Bet Regards, Michael 

[Torsten Meringer]

Any chance that there is a reverse proxy involved which requires additional authentication? ;-)

[Michael Rätzsch]

*hmm

Could be possible.
I will get in touch with my Admin and give it a try.

Thanks for your advice.

[Alfredo Fidani]

Same occurred to me.

It is fixed?

There is a workaround to solve it?