javascript - 类型错误 : Cannot read property 'sid' of undefined

Question

我正在尝试发送一条短信(在 Twilio 的 API Explorer 中有效)，但在我的 Node 安装下似乎失败了。我刚刚完全卸载并重新安装，但无济于事。

错误

7 Oct 21:28:37 - [nodemon] starting `node scraper.js`
Free on Xbox One, Xbox 360, PS3, PS4: Tales from the Borderlands (Episode 1)
/Users/rhysedwards/Downloads/insightful/ozbargain/node_modules/twilio/node_modules/q/q.js:126
                    throw e;
                    ^

TypeError: Cannot read property 'sid' of undefined
    at /Users/rhysedwards/Downloads/insightful/ozbargain/scraper.js:39:31
    at /Users/rhysedwards/Downloads/insightful/ozbargain/node_modules/twilio/node_modules/q/q.js:1924:17
    at flush (/Users/rhysedwards/Downloads/insightful/ozbargain/node_modules/twilio/node_modules/q/q.js:108:17)
    at doNTCallback0 (node.js:408:9)
    at process._tickCallback (node.js:337:13)
7 Oct 21:28:39 - [nodemon] app crashed - waiting for file changes before starting...

剥离后的 twilio 代码出错；

7 Oct 22:24:44 - [nodemon] starting `node scraper.js`
/Users/rhysedwards/Downloads/insightful/ozbargain/node_modules/twilio/node_modules/q/q.js:126
                    throw e;
                    ^

TypeError: Cannot read property 'sid' of undefined
    at /Users/rhysedwards/Downloads/insightful/ozbargain/scraper.js:12:24
    at /Users/rhysedwards/Downloads/insightful/ozbargain/node_modules/twilio/node_modules/q/q.js:1924:17
    at flush (/Users/rhysedwards/Downloads/insightful/ozbargain/node_modules/twilio/node_modules/q/q.js:108:17)
    at doNTCallback0 (node.js:408:9)
    at process._tickCallback (node.js:337:13)
7 Oct 22:24:46 - [nodemon] app crashed - waiting for file changes before starting...

代码

var accountSid = 'AC*******';
var authToken = 'da********';

var fs = require('fs'),
    request = require('request'),
    cheerio = require('cheerio'),
    client = require('twilio')(accountSid, authToken);

url = 'http://www.ozbargain.com.au';

request(url, function(error, response, html) {
    if (!error && response.statusCode == 200) {
        var $ = cheerio.load(html);
        var $el = $("a:contains('Xbox')");

        if ($el.length) {
          client.messages.create({
            to: "61448141065",
            from: "+61418739508",
            body: "hey",
          }, function(err, message) {
            console.log(message.sid);
          });
            console.log($el.text());
        } else {
            console.log('hey');
        }
    }
});

Answer 1

client.messages.create 的回调用作

}, function(err, message) {
    console.log(message.sid);
});

当出现错误时，回调的第一个参数err将包含与错误相关的信息，第二个参数message将是undefined 。

如下更新代码以处理错误情况

}, function (err, message) {
    if (err) {
        // Handle error
        // Show appropriate message to user
    } else {
        // No error

        if (message.sid) {
            // Use sid here

        }
    }
    console.log(message.sid);
});