Using the Microsoft Graph API from SAS

The SAS code and macros in this project are designed to make common tasks easier when using SAS to access Microsoft 365 content. This includes OneDrive and SharePoint Online (including content in Microsoft Teams).

To use SAS or any scripting language with Microsoft 365, you must first register a client app, authenticate with your identity to grant it permissions, and obtain an authorization code. With the auth code in hand, you can then use the code routines in this project to get an access token and invoke API methods to accomplish tasks such as:

• List available drives in OneDrive
• List folders and files within OneDrive and SharePoint folders (include files within Microsoft Teams)
• Download files from OneDrive or SharePoint into your SAS session
• Upload files from SAS to a folder on OneDrive or SharePoint

For more guidance about how to register a client app for use with the Microsoft Graph API, see Using SAS with Microsoft 365.

Create the config.json file with your client app details

These macros use a file named config.json to reference your client app details, including the app ID and your Azure tenant ID. The file has this format:

{
   "tenant_id": "your-azure-tenant",
   "client_id": "your-app-client-id",
   "redirect_uri": "https://login.microsoftonline.com/common/oauth2/nativeclient",
   "resource" : "https://graph.microsoft.com"
}

Designate a secure location for this file and for your token.json file (to be created in a later step). The information within these files is sensitive and specific to you and should be protected. See How to protect your REST API credentials in SAS programs for guidance.

Download and include ms-graph-macros.sas code

This repository contains a SAS program (named ms-graph-macros.sas) with all of the macro routines you need for the remaining tasks. Download this file to a local folder and use %INCLUDE to submit in SAS.

%let src=<my-local-project>\sas-microsoft-graph-api;
%include "&src./ms-graph-macros.sas";

You can also include directly from GitHub:

/* Run just once in your session */
options dlcreatedir;
%let repopath=%sysfunc(getoption(WORK))/sas-microsoft-graph-api;
libname repo "&repopath.";
data _null_;
    rc = git_clone( 
      "https://github.com/sascommunities/sas-microsoft-graph-api", 
      "&repoPath." 
    			); 
    put 'Git repo cloned ' rc=; 
run;
%include "&repopath./ms-graph-macros.sas";

Initialize the config folder

The macro routines need to know where your config.json and token.json file are located. The initConfig macro initializes this.

/* This path must contain your config.json, and will also */
/* be the location of your token.json */
%initConfig(configPath=/u/yourId/Projects/ms365);

DO ONCE: Get an auth code

Note: you need this step only if you haven't already generated an auth code and stored in token.json. See Step 2 in this article.

This helper macro will generate the URL you can use to generate an auth code.

%generateAuthUrl();

The SAS log will contain a URL that you should copy and paste into your browser. After authenticating to Microsoft 365 and granting permissions, the URL address bar will change to include a code= value that you need for the next step. Copy only the code= value, not any other values that follow in the URL. (Again, this is covered in Step 2 of this article -- reference for the specific steps to follow!)

DO ONCE: Generate the first access token

If you just generated your auth code for the first time or needed to get a new one because the old one was revoked or expired, then you need to use the auth code to get an initial access token.

/* Note: this code can be quite long -- 700+ characters. */
%let auth_code=PASTE-YOUR-AUTH-CODE-HERE;

/*
  Now that we have an authorization code we can get the access token
  This step will write the token.json file that we can use in our
  production programs.
*/
%get_access_token(&auth_code.);

When successful, token.json will be created/updated in the config directory you specified.

You should now have both config.json and token.json in your designated config folder. This screenshot shows an example of these files in a hidden folder named "~/.creds".

Refresh access token and connect to Microsoft 365

Use the %initSessionMS365 macro routine to exchange the refresh-token stored in token.json for an active non-expired access token.

 %initSessionMS365;

Methods to list content, download files, upload files

With a valid access token to connect to Microsoft 365, we can now use various methods to discover and list content within OneDrive and SharePoint (including Teams), and also copy files from these sources into your SAS session, and copy files from SAS into Microsoft 365.

The flow for file discovery is iterative. Each method creates an output data set that can be queried/filtered to a selection of interest, and that will result in an identifier for a folder or file that feeds into the next method.

Example: List SharePoint folders files

Here's an example code flow:

/* this macro fetches the root IDs for document libraries in your site */
%listSiteLibraries(
 siteHost=mysite.sharepoint.com,
 sitePath=/sites/Department,
 out=libraries);

/* store the ID value for the library in a macro variable, where "Documents" is at root */
proc sql noprint;
 select id into: libraryId from libraries where name="Documents";
quit;

/* LIST TOP LEVEL FOLDERS/FILES */

/* special macro to pull ALL items from root folder */
%listFolderItems(driveId=&libraryId., folderId=root, out=work.paths);

Example output:

/* LIST ITEMS IN A SPECIFIC FOLDER */

/*
 At this point, if you want to act on any of the items, you just replace "root" 
 with the ID of the item. So to list the items in the "General" folder I have:
  - find the ID for that folder
  - list the items within using %listFolderItems and passing that folder ID
*/

/* Find the ID of the folder I want */
proc sql noprint;
 select id into: folder from paths
  where name="General";
quit;

/* Pull ALL items from a folder */
%listFolderItems(driveId=&libraryId., folderId=&folder., out=work.folderItems);

Example output (data set):

Example: Upload a file from SAS to SharePoint

/* Create a sample file to upload */
%let targetFile=iris.xlsx;
filename tosave "%sysfunc(getoption(WORK))/&targetFile.";
ods excel(id=upload) file=tosave;
proc print data=sashelp.iris;
run;
ods excel(id=upload) close;

/* Upload to the "General" folder, the folder ID from previous step */
%uploadFile(driveId=&libraryId.,
  folderId=&folder.,
  sourcePath=%sysfunc(getoption(WORK)),
  sourceFilename=&targetFile.);

Notes:

• The "list" methods (such as listFolderItems) have special handling to use multiple API calls to gather a complete list of results. The Microsoft Graph API methods return a max of 200 items in a response with an indicator if there are more. These SAS macros will follow through and gather the complete list.

• The uploadFile method uses the special "large file upload" handling to create an upload session that can accommodate files larger than the 4MB size that is the default size limit.