video streamer

gistfile1.js

var fs = require("fs");

module.exports = {
  play: function(req, res) {
    var path = "video.mp4";
    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);

      res.writeHead(206, {
        "Content-Range": "bytes " + start + "-" + end + "/" + total,
        "Accept-Ranges": "bytes",
        "Content-Length": chunksize,
        "Content-Type": "video/mp4"
      });

      fs.createReadStream(path, {
          start: start,
          end: end
        })
        .pipe(res);
      
    } else {      
      res.writeHead(200, {
        "Content-Length": total,
        "Content-Type": "video/mp4"
      });
      
      fs.createReadStream(path).pipe(res);
    }
  }
};