问题描述
我想将内容流式传输到可能存储在数据库中的客户端,它们将作为文件保存。
显然,res.download会很好地完成这项工作,但是没有一个响应。*函数接受流,只有文件路径。
我看了一下res.download impl,它只是设置Content-Disposition头,然后是sendfile。
所以我可以使用这个帖子作为指导。
但是,似乎我会错过res.send执行的所有包装方面。
目前正在创建临时文件,这样我就可以使用res.download现在。
您可以直接流式传输到响应对象(它是一个Stream)。 >
一个基本的文件流看起来像这样。
function(req, res,next){
if(req.url ===somethingorAnother){
res.setHeader(content-type,some / type);
fs.createReadStream(./ toSomeFile)。pipe(res);
} else {
next(); //不是我们的关心,传递给下一个中间件功能
}
}
这将负责绑定到数据
和结束
事件。
I want to stream content to clients which is possibly stored in db, which they would save as files.
Obviously res.download would do the job nicely, but none of the response.* functions accept a stream, only file paths.
I had a look at res.download impl and it just sets Content-Disposition header and then a sendfile.
So I could achieve this using this post as a guide.Node.js: pipe stream to response freezes over HTTPS
But it seems I would miss out on all the wrapping aspects that res.send performs.
Am I missing something here or should I just do the pipe and not worry about it - what is best practice here?
Currently creating temp files so I can just use res.download for now.
You can stream directly to the response object (it is a Stream).
A basic file stream would look something like this.
function(req, res, next) {
if(req.url==="somethingorAnother") {
res.setHeader("content-type", "some/type");
fs.createReadStream("./toSomeFile").pipe(res);
} else {
next(); // not our concern, pass along to next middleware function
}
}
This will take care of binding to data
and end
events.
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