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nodejs 的 FileSystem相关代码
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// 同步读写 | |
fs.writeFileSync('b.txt', fs.readFileSync('a.txt')); | |
// 异步读写 | |
// 版本一 | |
fs.createReadStream('a.txt').pipe(fs.createWriteStream('b.txt')); | |
// 版本二 | |
var rs = fs.createReadStream('a.txt'); | |
var ws = fs.createWriteStream('b.txt'); | |
rs.on('data', function (chunk) { | |
ws.write(chunk); | |
}); | |
rs.on('end', function () { | |
ws.end(); | |
}); | |
// 版本三 | |
var rs = fs.createReadStream('a.txt'); | |
var ws = fs.createWriteStream('b.txt'); | |
rs.on('data', function (chunk) { | |
// 当读取的数据没有写进文件,而是在缓冲区,则停止读取数据流 | |
if (ws.write(chunk) === false) { | |
rs.pause(); | |
} | |
}); | |
rs.on('end', function () { | |
ws.end(); | |
}) | |
// 当读取的数据已经写入文件,则恢复读取数据流 | |
ws.on('drain', function () { | |
rs.resume(); | |
}); | |
// 参考:http://nqdeng.github.io/7-days-nodejs/#3.1 |
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