Twilio：使用 Node.js 从特定数字中计算日志中 SMS 消息的数量

Question

I'm trying to write a Twilio server-side function ( https://console.twilio.com/us1/develop/functions/classic ) in Node.js to count the number of incoming messages from any sender.

If the number is = 0, do X.

If the number is > 0, do Y.

Obviously the code below doesn't work, and may even be wildly off. The resulting error message is: "{"message":"username is required","name":"Error","stack":"Error: username is required\\n at new Twilio (/var/task/node_modules/twilio/lib/rest/Twilio.js:141:11)"

Any assistance is appreciate. Thanks!

exports.handler = function(context, event, callback) {
    // 
    const accountSid = process.env.TWILIO_ACCOUNT_SID;
    const authToken = process.env.TWILIO_AUTH_TOKEN;
    const client = require('twilio')(accountSid, authToken);
    //
    //const Phone = event.Phone;
    
    client.messages
          .list({
             from: event.Phone
           })
          .then(messages => messages.forEach(m => console.log(m.sid)));
    //
    if(messages.length === 0)
    {
        return callback(null,"Continue");
    } else {
        //
        return callback("Error","Error");
    }
};

Answer 1

Twilio developer evangelist here.

First up, can I recommend you use a Twilio Functions Service , not classic Functions.

Your error message suggests to me that your accoundSid is blank. Within Twilio Functions, your Account Sid and Auth Token are saved as the environment variables ACCOUNT_SID and AUTH_TOKEN and should be accessed on the context object rather than process.env . To make things easier, you can create a client using context.getTwilioClient() instead.

Once you've fixed that, there will still be more to do as the call to client.messages.list is asynchronous, so you should not callback until that API request is complete.

Try something like this instead:

exports.handler = function (context, event, callback) {
  const client = context.getTwilioClient();

  client.messages
    .list({
      from: event.Phone,
    })
    .then((messages) => {
      messages.forEach((m) => console.log(m.sid));
      if (messages.length === 0) {
        return callback(null, "Continue");
      } else {
        return callback(null, "Error");
      }
    })
    .catch(error => callback(error));
};

Answer 2

From Twilio support, which aligns with Phil's answer:

exports.handler = function(context, event, callback) {
 // Make sure under the Functions Global Config tab:
 // "Add my Twilio Credentials (ACCOUNT_SID) and (AUTH_TOKEN) to ENV" is CHECKED
 const client = context.getTwilioClient();
 
 const phoneNumber = event.From_Number;

 client.messages
    .list({ from: phoneNumber, limit:20 })
    .then((result) => {
    console.log(result.length);
    return callback(null, result);
 })
    .catch((error) => {
    console.error(error);
    return callback(error, null);
 });
};

Answer 3

The version of the answer I'm actually using:

exports.handler = function (context, event, callback) {
  //
  const client = context.getTwilioClient();
  //
  client.messages
    .list({
      from: event.Phone,
    })
    .then((messages) => {
      // messages.forEach((m) => console.log(m.sid));
      if (messages.length <= 1) {
        console.log("The number of previous messages is " + messages.length);
        return callback(null, "Continue");
      } else {
        return callback("The number of previous messages is " + messages.length);
      }
    })
    .catch(error => callback(error));
};