node 生成了一个文件的buffer, 通过writeFile()
可以吧这个buffer输出到服务器上,我想生成这个文件之后不存在服务器上,而是推送到浏览器上,直接被下载,咋搞?
res.set('Content-Type','application/force-download');
res.set('Content-Disposition','attachment;filename=aa.txt');
/*
//直接读取文件
var fReadStream = fs.createReadStream(filePath, {
encoding : 'binary',
bufferSize : 1024 * 1024
});
*/
//复用你之前得到的buffer 需要引用[stream-buffer](https://www.npmjs.com/package/stream-buffers)
var myReadableStreamBuffer = new streamBuffers.ReadableStreamBuffer({
frequency: 10 // in milliseconds.
chunkSize: 2048 // in bytes.
});
myReadableStreamBuffer.put(aBuffer);
myReadableStreamBuffer.on('data', function(chunk) {
res.write(chunk, 'binary');
});
myReadableStreamBuffer.on('end', function() {
res.end();
});