Question

我正在尝试使用fs.createReadStream（）在Node.js中传输媒体文件（.mkv）。这适用于小于2MB的文件，它们正确加载为各自HTML5视频元素的src。

对于大于2MB的媒体文件，这不起作用。他们不加载。在控制台的“网络”选项卡中，GET请求在转移数据约30KB后显示状态“（已取消）”。奇怪的是，视频元素似乎显示了媒体文件的正确持续时间。

Request Method:GET
Status Code:206 Partial Content

请求标题

Accept:*/*
Accept-Encoding:identity;q=1, *;q=0
Accept-Language:nl-NL,nl;q=0.8,en-US;q=0.6,en;q=0.4,de;q=0.2,el;q=0.2
Connection:keep-alive
Host:(...)
Range:bytes=0-
Referer:yaddayadda
User-Agent:Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.57 Safari/537.36

响应标头

Accept-Ranges:bytes
Access-Control-Allow-Headers:origin, content-type
Access-Control-Allow-Methods:POST, GET, OPTIONS, DELETE
Access-Control-Allow-Origin:*
Connection:keep-alive
Content-Length:5716684
Content-Range:bytes 0-5716683/5716684
Content-Type:video/mp4
Date:Tue, 19 Nov 2013 16:29:51 GMT
X-Powered-By:Express

Serverside代码

app.get('/getStream/:u/:f', function(req, res) {
    "use strict";
    var userId = req.params.u;
    var file = req.params.f;
    var path = "/tmp/" + userId + "/" + file;
    var stat = fs.statSync(path);
    var total = stat.size;
    if (req.headers['range']) {
        var range = req.headers.range;
        var parts = range.replace(/bytes=/, "").split("-");
        var partialstart = parts[0];
        var partialend = parts[1];

        var start = parseInt(partialstart, 10);
        var end = partialend ? parseInt(partialend, 10) : total - 1;
        var chunksize = (end - start) + 1;
        console.log('RANGE: ' + start + ' - ' + end + ' = ' + chunksize);

        var file = fs.createReadStream(path, {start: start, end: end});
        res.writeHead(206, {'Content-Range': 'bytes ' + start + '-' + end + '/' + total, 'Accept-Ranges': 'bytes', 'Content-Length': chunksize, 'Content-Type': 'video/mp4'});
        file.pipe(res);
    } else {
        console.log('ALL: ' + total);
        res.writeHead(200, {'Content-Length': total, 'Content-Type': 'video/mp4'});
        fs.createReadStream(path).pipe(res);
    }
});

Serverside笔记

我尝试使用简单的stream.pipe（res），但问题仍然存在。

我希望我已经提供了足够的信息。

提前致谢

Node.js流/管道大于2 MB的文件会导致取消GET请求

0 个答案: