node.js: 邮件解析器不工作

Question

我想解析一封邮件，找到了 mailparser 包。（使用 "npm install mailparser" 安装）。我正在使用 windows 7。我正在尝试运行这个简单的例子，但是 "end" 事件没有被调用而且我没有看到任何日志。这就是我运行:

const MailParser = require("mailparser").MailParser;
const mailparser = new MailParser({debug: true});

let email = "From: 'Sender Name' <sender@example.com>\r\n"+
    "To: 'Receiver Name' <receiver@example.com>\r\n"+
    "Subject: Hello world!\r\n"+
    "\r\n"+
    "How are you today?";

// setup an event listener when the parsing finishes
mailparser.on("end", function(mail_object){
    console.log("From:", mail_object.from); //[{address:'sender@example.com',name:'Sender Name'}]
    console.log("Subject:", mail_object.subject); // Hello world!
    console.log("Text body:", mail_object.text); // How are you today?
});

// send the email source to the parser
mailparser.write(email);
mailparser.end();

我做错了什么？感谢

Answer 1

根据 the fine manual，只有两个事件：headers 和 data。

也许最简单的方法是使用 simpleParser instead of the lower-level (event-driven) MailParser:

const simpleParser = require('mailparser').simpleParser;
...
simpleParser(email).then(function(mail_object) {
  console.log("From:", mail_object.from.value);
  console.log("Subject:", mail_object.subject);
  console.log("Text body:", mail_object.text);
}).catch(function(err) {
  console.log('An error occurred:', err.message);
});

Answer 2

OP 似乎在询问 mazira/mailparser-mit, which is a fork of the more popular nodemailer/mailparser。

主线 mailparser 已经切换回 MIT 许可证，并且 mailparser-mit 分支在撰写本文时已经两年没有更新了。

这是一个从 mailparser 包中开始使用较低级别 MailParser class 的示例：

const {MailParser} = require('mailparser') // v3.0.1
const {createReadStream} = require('fs')

const parseEmail = async (readableStream) =>
  new Promise((resolve, reject) =>
    readableStream
      .pipe(new MailParser())
      .on('headers', (headers) => console.log('headers', headers))
      .on('data', (data) => console.log('data', data))
      .on('error', reject)
      .on('end', resolve),
  )

parseEmail(createReadStream('emails/test1.eml'))

node.js: 邮件解析器不工作

node.js: mailparser not working

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node.js