how to get sas access token in proc http?

[Mayt]

Hi guys I've tried to get access token in proc http, but got errors

here are whative tried:

1.  got 404 Not Found in resp

filename resp "myapi.txt";

/* must include content-type/CT= option */
proc http 
 url="https://serviceaddress/oauth/access_token"
 in='grant_type=client_credentials&client_id=XXXXXXXX&client_secret=YYYYYYYY' 
 ct="application/x-www-form-urlencoded"
 out=resp
 method='POST'
;
run;

2. got {"error":"invalid_client","error_description":"Unauthorized grant type"}

filename resp "myapi.txt;

proc http url="https://serviceaddress/SASLogon/oauth/token"
	method='post'
	in="grant_type=password%nrstr(&username=)&USERNAME.%nrstr(&password=)&PASSWORD."
	username="&CLIENT_ID."
	password="&CLIENT_SECRET."
	out=resp
	auth_basic verbose;
	debug level=3;
run;

if I change &client_id.,&client_secret. to other id/secret I'll get  unauthorized too, but with bad credentials.

[DavidHD · Accepted solution]

Is it the same SAS Viya host in which the SAS session is running?

If you can simply use this:

* Macro variable containg the Viya Host name;
%let viyaHost = %sysfunc(getoption(SERVICESBASEURL)); 
%let folderName = <string-that-folder-name-must-contain>;

* The authentication is provided by SAS Studio - so there is no need for any of the authentication steps here;
filename folders temp;
proc http
    url = "&viyahost./folders/folders"
    out= folders
    oauth_bearer = sas_services
    query = ('limit'='5' 'filter'="contains('name', &folderName.)");
    headers
        'Accept'= 'application/vnd.sas.collection+json';
run;
libname folders json;

proc print data=folders.items noobs;
run;

If you call upon another environment or even call from SAS 9.4 then try this:

/****************************
	AUTHENTICATION TO VIYA
*****************************/
* Macro variables to configure the connection;
%let viyaHost = <Enter-your-SAS-Viya-Host-Base-URL-Here>; 
%let user = <Enter-your-SAS-Viya-username-here>;
%let pw = <Enter-your-SAS-Viya-password-here>;

filename outResp temp;
 
* Get authentication token with the scope of the SAS Viya CLI;
proc http
	url="&viyaHost./SASLogon/oauth/token"
	in="grant_type=password&username=&user.&password=&pw."
	out=outResp;
	headers 'Content-Type' = ' application/x-www-form-urlencoded';
	headers 'Authorization' = 'Basic c2FzLmNsaTo=';
run;

/*
* Explanation of the header 'Authorization' = 'Basic c2FzLmNsaTo=';
* This is the base64 encoded string sas.cli: which is used as the client scope;
data _null_;
	baseString = 'sas.cli:';
	encodedString = put(baseString, $base64x64.);
	put encodedString=;
run;
*/

libname outResp json;

* Write the access token to a macro variable named accessToken;
proc sql;
	select value into :accessToken
		from outresp.alldata
			where p1 = 'access_token';
quit;

* Clean up;
libname outResp clear;
filename outResp clear;
%symdel user pw;
/****************************
	WORK WITH VIYA APIs
*****************************/
* Parameters for the subsquent API calls;
%let folderName = <Enter-the-folder-of-interest-here>;

filename folders temp;

* Call the folders API;
proc http
    url = "&viyaHost./folders/folders"
    out= folders
    query = ('limit'='5' 'filter'="contains('name', &folderName.)");
    headers 'Accept'= 'application/vnd.sas.collection+json';
	headers 'Authorization' = "Bearer &accessToken.";
run;

libname folders json;

title "First five folders containg the &folderName. in their name";
proc print data=folders.items noobs;
run;
title;

* Clean up;
libname folders clear;
filename folders clear;
%symdel viyaHost accessToken;

[Mayt]

yes, the sas intelligent has the same host as  the sas session.

well, I want to try your first code, but I'm little confused what the variable folderName is. Is it the folder that contains sas token?

[DavidHD]

the folderName macro variable was just there as my example features the /folders/folders API endpoint and it filters for folders that have the value of that macro variable.

The SAS token is implicitly taken care of through the proc http statement oauth_bearer = sas_services - this is comfort feature that reuses your SAS sessions token to authenticate with SAS Viya.

[Mayt]

Thank you so much!! It works.