Github REST API full example
You were close:) Lets assume, that
1) your login: YourUsername
2) your access token: 123a321
3) repository to be updated: YourRepo
4) file to be created: file.txt
5) folder that will contains new file: f1/f2
According to those assumptions your request should be following:
type : PUT
url : https://api.github.com/repos/YourUsername/YourRepo/contents/f1/f2/file.txt
headers :
{
"Content-Type" : "application/vnd.github.v3+json",
"Authorization" : "token 123a321"
}
body :
{
"message": "my commit message",
"committer": {
"name": "My name",
"email": "my email"
},
"content": "base64encoded"
}
UPD
If you write in java, you can use GitHubFileAPI library, that I recently pushed to the maven central repository.