URL_fetchの
// Make a POST request with form data.
var resumeBlob = Utilities.newBlob('Hire me!', 'text/plain', 'resume.txt');
var formData = {
'name': 'Bob Smith',
'email': 'bob@example.com',
'resume': resumeBlob
};
// Because payload is a JavaScript object, it will be interpreted as
// as form data. (No need to specify contentType; it will automatically
// default to either 'application/x-www-form-urlencoded'
// or 'multipart/form-data')
var options = {
'method' : 'post',
'payload' : formData
};
UrlFetchApp.fetch('https://httpbin.org/post', options);
https://sites.google.com/site/gasgaidobukku/url-fetch/postmesoddoniyoru-song-xin