这是我正在使用的工作示例。但是以某种方式（也许仅以我为例），这可能会非常缓慢。
//== Server Sidess(socket).on('filedownload', function (stream, name, callback) { //== Do stuff to find your file callback({ name : "filename", size : 500 }); var MyFileStream = fs.createReadStream(name); MyFileStream.pipe(stream);});//== Client Sidefunction downloadFile(name, originalFilename) { var deferred = $.Deferred(); //== Create stream for file to be streamed to and buffer to save chunks var stream = ss.createStream(), fileBuffer = [], fileLength = 0; //== Emit/Request ss(mysocket).emit('filedownload', stream, name, function (fileError, fileInfo) { if (fileError) { deferred.reject(fileError); } else { console.log(['File Found!', fileInfo]); //== Receive data stream.on('data', function (chunk) { fileLength += chunk.length; var progress = Math.floor((fileLength / fileInfo.size) * 100); progress = Math.max(progress - 2, 1); deferred.notify(progress); fileBuffer.push(chunk); }); stream.on('end', function () { var filedata = new Uint8Array(fileLength), i = 0; //== Loop to fill the final array fileBuffer.forEach(function (buff) { for (var j = 0; j < buff.length; j++) { filedata[i] = buff[j]; i++; } }); deferred.notify(100); //== Download file in browser downloadFileFromBlob([filedata], originalFilename); deferred.resolve(); }); } }); //== Return return deferred;}var downloadFileFromBlob = (function () { var a = document.createElement("a"); document.body.appendChild(a); a.style = "display: none"; return function (data, fileName) { var blob = new Blob(data, { type : "octet/stream" }), url = window.URL.createObjectURL(blob); a.href = url; a.download = fileName; a.click(); window.URL.revokeObjectURL(url); };}());
