以前项目里有这个方法，最近在客户那里出问题了，同事说，这个方法从来就没管用过，SO，用了一天时间把这个方法给搞出来了（觉得花费的时间长了点），分享之。
代码及测试用例：
var http = require('http');var path = require('path');var fs = require('fs');function postFile(fileKeyValue, req) { var boundaryKey = Math.random().toString(16); var enddata = '/r/n----' + boundaryKey + '--'; var files = new Array(); for (var i = 0; i < fileKeyValue.length; i++) { var content = "/r/n----" + boundaryKey + "/r/n" + "Content-Type: application/octet-stream/r/n" + "Content-Disposition: form-data; name=/"" + fileKeyValue[i].urlKey + "/"; filename=/"" + path.basename(fileKeyValue[i].urlValue) + "/"/r/n" + "Content-Transfer-Encoding: binary/r/n/r/n"; var contentBinary = new Buffer(content, 'utf-8');//当编码为ascii时，中文会乱码。 files.push({contentBinary: contentBinary, filePath: fileKeyValue[i].urlValue}); } var contentLength = 0; for (var i = 0; i < files.length; i++) { var stat = fs.statSync(files[i].filePath); contentLength += files[i].contentBinary.length; contentLength += stat.size; } req.setHeader('Content-Type', 'multipart/form-data; boundary=--' + boundaryKey); req.setHeader('Content-Length', contentLength + Buffer.byteLength(enddata)); // 将参数发出 var fileindex = 0; var doOneFile = function(){ req.write(files[fileindex].contentBinary); var fileStream = fs.createReadStream(files[fileindex].filePath, {bufferSize : 4 * 1024}); fileStream.pipe(req, {end: false}); fileStream.on('end', function() { fileindex++; if(fileindex == files.length){ req.end(enddata); } else { doOneFile(); } }); }; if(fileindex == files.length){ req.end(enddata); } else { doOneFile(); } }//测试用例//http://nodejs.org/api/http.html#http_http_request_options_callbackvar files = [ {urlKey: "file1", urlValue: "E://DFBF.jpg"}, {urlKey: "file2", urlValue: "E://1.jpg"}, {urlKey: "file3", urlValue: "E://Pro 空格 中文.mp3"}]var options = { host: "localhost", port: "8908" , method: "POST", path: "/Home/Upload"}var req = http.request(options, function(res){ console.log("RES:" + res); console.log('STATUS: ' + res.statusCode); console.log('HEADERS: ' + JSON.stringify(res.headers)); //res.setEncoding("utf8"); res.on("data", function(chunk){ console.log("BODY:" + chunk); })})req.on('error', function(e){ console.log('problem with request:' + e.message); console.log(e);})postFile(files, req);console.log("done");服务端测试，用mvc在home控制器写了个upload方法，并遍历上传的文件将其保存在硬盘上了。
只是上传大文件会有问题，估计是需要服务器进行配置，暂且不管。
服务端方法（写在了Home控制器下）
[HttpPost] public string Upload() { //HttpPostedFileBase file = this.Request.Files["file"]; //file.SaveAs(file.FileName); foreach (string file in this.Request.Files) { this.Request.Files[file].SaveAs(@"E:/新建文件夹/" + this.Request.Files[file].FileName); } return @"保存成功 路径：E:/新建文件夹/"; }运行脚本：
node nodejsPostFile.js
运行结果：