如何在javascript中使模块异步
如何在javascript中使模块异步
提问于 2017-08-18 22:14:26
我是javascript的新手。我有使用sendgrid发送电子邮件的简单模块：
// using SendGrid's v3 Node.js Library
// https://github.com/sendgrid/sendgrid-nodejs
var helper = require('sendgrid').mail;
var fromEmail = new helper.Email('test@test.com');
var toEmail = new helper.Email('sample@sample.com');
var subject = 'Sending with SendGrid is Fun';
var content = new helper.Content('text/plain', 'and easy to do anywhere, even with Node.js');
var mail = new helper.Mail(fromEmail, subject, toEmail, content);
var sg = require('sendgrid')("**********************");
var request = sg.emptyRequest({
method: 'POST',
path: '/v3/mail/send',
body: mail.toJSON()
});
sg.API(request, function (error, response) {
if (error) {
console.log('Error response received');
}
console.log(response.statusCode);
console.log(response.body);
console.log(response.headers);
});现在我想以异步的方式调用这个模块。我应该实现promise还是使用async，等待？
回答 1
Stack Overflow用户
回答已采纳
发布于 2017-08-19 08:44:15
根据sendgrid的docs的说法，promise已经实现了，这使得这一点变得更容易，因为您只需从模块返回该promise。例如，如果您只想使用该承诺，则可以：
//mymodule.js
var helper = require('sendgrid').mail;
var fromEmail = new helper.Email('test@test.com');
var toEmail = new helper.Email('sample@sample.com');
var subject = 'Sending with SendGrid is Fun';
var content = new helper.Content('text/plain', 'and easy to do anywhere, even with Node.js');
module.exports = function(from, subject, to, content){
var mail = new helper.Mail(fromEmail, subject, toEmail, content);
var sg = require('sendgrid')("**********************");
var request = sg.emptyRequest({
method: 'POST',
path: '/v3/mail/send',
body: mail.toJSON()
});
return sg.API(request)
}现在您可以简单地使用它，如下所示：
mail = require('./mymodule')
mail("from@example.com", "subject", "to@example.com", content)
.then(function(response) {
// use response.body etc
})页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/45758825
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