How to Convert cURL POST Request in PHP to Google Apps Script

Question

VoIP.ms offers the ability to send SMS text messages from its API. They provide the following sample code:

<?
$postfields = array(
    'api_username'=>'john@domain.com',
    'api_password'=>'password',
    'method'=>'getServersInfo',
    'server_pop'=>'1'
);

$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt($ch, CURLOPT_POST, true );
curl_setopt($ch, CURLOPT_POSTFIELDS, $postfields);
curl_setopt($ch, CURLOPT_URL, "https://voip.ms/api/v1/rest.php");
$result = curl_exec($ch);
curl_close($ch);

$data=json_decode($result,true);

echo "<pre>";
print_r($data);
echo "</pre>";
?>

When I execute the following command from the command line in Terminal, I'm able to successfully send an SMS text message from VoIP.ms:

curl -X POST -F 'api_username=john@domain.com' -F 'api_password=password' -F 'method=sendSMS' -F 'did=1234567890' -F 'dst=0987654321' -F 'message=Hello' https://voip.ms/api/v1/rest.php

By searching around on Google, I've cobbled together the following Google Apps Script:

function sendSMS() {
  var formData = {
    api_username : "john@domain.com",
    api_password : "password",
    method : "sendSMS",
    did : 1234567890,
    dst : 0987654321,
    message : "Hello"
};
  var options = {
    method : "POST",
    payload : formData
};
  UrlFetchApp.fetch("https://voip.ms/api/v1/rest.php", options);
}

When I run the script, I get the following error:

Exception: Request failed for https://voip.ms returned code 500. Truncated server response: > xml version="1.0" encoding="UTF-8"?> <env:Envelope xmlns:env="http://www.w3.org/2003/05/soap-envelope">env:Bodyenv:Faultenv:Codeenv:Value... (use muteHttpExceptions option to examine full response) sendSMS @ Code.gs:14

Any suggestions on where I'm going wrong?

Answer 1

I believe your goal is as follows.

• You want to convert the following curl command to Google Apps Script. And, your curl command works fine.

    curl -X POST -F 'api_username=john@domain.com' -F 'api_password=password' -F 'method=sendSMS' -F 'did=1234567890' -F 'dst=0987654321' -F 'message=Hello' https://voip.ms/api/v1/rest.php
  

Modification points:

• From your sample curl command, it seems that did : 1234567890 and dst : 0987654321 should be did : "1234567890" and dst : "0987654321". This has already been mentioned in the TheMaster's comment.

• In your curl command, -F is used. In this case, the content type of the request header is multipart/form-data. Unfortunately, UrlFetchApp uses application/x-www-form-urlencoded as the default content type.

When these points are reflected in tha Google Apps Script, how about the following modification?

Modified script:

function sendSMS() {
  var formData = {
    api_username: "john@domain.com",
    api_password: "password",
    method: "sendSMS",
    did: "1234567890",
    dst: "0987654321",
    message: "Hello"
  };
  var options = { payload: Object.entries(formData).reduce((o, [k, v]) => (o[k] = Utilities.newBlob(v), o), {}) };
  UrlFetchApp.fetch("https://voip.ms/api/v1/rest.php", options);
}

Note:

• This modified script supposes that your URL of https://voip.ms/api/v1/rest.php can be accessed from the Google side, and the values of your formData are valid values. Please be careful about this.

• At UrlFetchApp, the request body of multipart/form-data is automatically created in the internal server side. But, if this request body couldn't be used to your API (There is sometimes a case that this request body cannot be used.), please test the request using FetchApp (Author: me).

Reference:

• fetch(url, params)