How to login to RQM using REST API?

Question

I'm trying to communicate with IBM Rational Quality Manager server using its REST API. I'm using RESTClient browser plugin, and while the browser is logged in, everything works as expected. For the record, my requests look like

https://server/qm/service/com.ibm.rqm.integration.service.IIntegrationService/resources/project/testscript/urn:com.ibm.rqm:testscript:42

However, if I wait long enough for RQM to logout, REST API says I need to login back to proceed (see below). I'm pretty sure this is possible to do via the API itself, because RQM ships with RQMUrlUtility which accepts username and password and runs basically the same REST requests I'm using:

java -jar RQMUrlUtility.jar -command GET -user JazzUserID -password JazzPassword -filepath pathtoFile -url REST_URL

So far, I have found this topic explaining how to login using HTTP basic authentication. Following this advice, I have added Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ= (not my real password) to the request, but RQM still fails to login. I have also tried setting User-Agent to a bogus value, as well as sending the value from JSESSIONID in X-Jazz-CSRF-Prevent header as described here, but regardless of all these headers being present or not, I get the same response:

Status Code: 200 OK
Cache-Control: no-cache="set-cookie, set-cookie2"
Connection: Keep-Alive
Content-Encoding: gzip
Content-Language: en-US
Content-Type: text/html; charset=UTF-8
Date: Tue, 26 Jan 2016 15:48:02 GMT
Expires: Thu, 01 Dec 1994 16:00:00 GMT
Keep-Alive: timeout=10, max=100
Set-Cookie: JazzFormAuth=Form; Path=/qm; Secure
x-com-ibm-team-scenario=ac55f959-c738-4ef0-854d-6e37648edcba%3Bname%3DInitial+Page+Load%3Bextras%3D%2Fqm%2Fauth%2Fauthrequired%2C1453823282026; Path=/
Transfer-Encoding: chunked
X-Powered-By: Servlet/3.0
X-com-ibm-team-repository-web-auth-msg: authrequired

Can anyone with experience with RQM API tell me what's wrong? Or perhaps I'm missing something basic, common to most RESP APIs out there?

Answer 1

Could it be your header name?

Authorisation: Basic dXNlcm5hbWU6cGFzc3dvcmQ= 

Should probably be:

Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ= 

Notice the "z".