问题描述
我正在入侵使用 smtp-protocol 来捕获SMTP的Node程序发送电子邮件并处理邮件数据.该库将邮件数据作为流提供，但我不知道如何将其转换为字符串.
I'm hacking on a Node program that uses smtp-protocol to capture SMTP emails and act on the mail data. The library provides the mail data as a stream, and I don't know how to get that into a string.
我目前正在使用stream.pipe(process.stdout, { end: false })将其写入stdout，但正如我所说，我需要将流数据存储在字符串中，一旦流结束，就可以使用它.
I'm currently writing it to stdout with stream.pipe(process.stdout, { end: false }), but as I said, I need the stream data in a string instead, which I can use once the stream has ended.
如何从Node.js流中将所有数据收集到字符串中?
How do I collect all the data from a Node.js stream into a string?
推荐答案
关键是使用 data 和 end 事件https://nodejs.org/api/stream.html#stream_visible_streams"rel =" noreferrer>可读流.听这些事件:
The key is to use the data and end events of a Readable Stream. Listen to these events:
stream.on('data', (chunk) => { ... });
stream.on('end', () => { ... });
当您收到data事件时，将新的数据块添加到为收集数据而创建的缓冲区中.
When you receive the data event, add the new chunk of data to a Buffer created to collect the data.
收到end事件时，如有必要，将完成的Buffer转换为字符串.然后做你需要做的.
When you receive the end event, convert the completed Buffer into a string, if necessary. Then do what you need to do with it.
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