First thing you need to do is to ensure the format of the spreadsheet. You need to have rows with the headers that contain the strings ID, Comments and Total and Late. The rest are self-explanatory, ID corresponds to a unique integer Canvas assigns to students. Export the Grades CSV to get access to this info.

Vaguely, the grades spreadsheet will look like this:

We need to download a client_secret.json file to do an OAuth handshake with the Google Sheets API.

1. Go here: http://console.developers.google.com. Log in with whichever account has access to the spreadsheet.

2. Under Library, find the Sheets API link. Enable the Sheets API by creating a project. Call it CanvasGradePusher. Make sure that when you go under the Sheets API, you see it as enabled.

3. Go under Credentials, click on Create Credentials, then OAuth Client ID.

   • Application type: Other. Name it CanvasGradePusher.
   • Ignore the pop-up screen.

4. Find the credential you just created and download it. Rename the file as client_secret.json and store it in the directory where GradePusher.java lives.

All Google Sheets links will have the following format: https://docs.google.com/spreadsheets/d/<SPREADSHEET_ID>/edit. Grab that ID and set it as SPREADSHEET_ID

Here we need to create an API token from Canvas to access the information. Click on "Account" on the top left, go on "Settings", scroll down and click on "New Access Token". Use whatever configurations you want, generate a token and set CANVAS_TOKEN to be that token.

Load the assignment for which you are pushing grades on your browser. The link will look like this: https://CANVAS_LINK/courses/COURSE_ID/assignments/ASSIGNMENT_ID. Fill those variables in as appropriate.

1. Make sure that the Google Spreadsheet is published to the web. Go on File/Publish to the Web... to assure this. This won't expose the spreadsheet, just allow those with the link (and in our case, the grade pusher) to access it.
2. Compile the program by running make.
3. make run will do a test run. This will pop open a browser window. Log into your Google account to which your client_secret.json is associated to and give permission to read your program. The program will print the JSON it will send to Canvas to the screen, so look to see if everything is appropriate.
4. If everything is good to go, make push to push grades.