如何通過URLFetch使用Google App腳本調用外部API

function checkACBalance() { 
    try{ 
    var url ="http://sms.mydomain.com/api/balance.php"; 
    alert(url); 
    var payload = {authkey:'d5558466554f11aa909d565ede677d40', route:'1'}; 
    alert(payload); 
    var payload_json = encodeURIComponent(JSON.stringify(payload)); 
    alert(payload_json); 
    var options = {method:"POST",contentType:"application/json",payload:payload_json,muteHttpExceptions:true}; 
    var result = UrlFetchApp.fetch(url, options); 
    var response = result.getContentText(); 
    alert(response) 
    var res_code = result.getResponseCode(); 
    alert(res_code) 
    }catch(e){ 
    alert(e) 
    } 
}

現在的問題是，當我使用此URLFetch類調用外部API時，這不起作用。在瀏覽器控制檯錯誤已經顯示出：如何通過URLFetch使用Google App腳本調用外部API

Uncaught TypeError: Cannot read property 'fetch' of undefined

來源

2015-09-04 Aditya Khanna

這個'checkACBalance'功能在哪裏呢？在GAS'code.gs'文件中使用HTML

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