nodejs 模拟form表单上传文件代码实例

var http = require('http');
var path = require('path');
var fs = require('fs');
 
function postFile(fileKeyValue, req) {
  var boundaryKey = Math.random().toString(16);
  var enddata = 'rn----' + boundaryKey + '--';
 
  var files = new Array();
  for (var i = 0; i < fileKeyValue.length; i++) {
   var content = "rn----" + boundaryKey + "rn" + "Content-Type: application/octet-streamrn" + "Content-Disposition: form-data; name="" + fileKeyValue[i].urlKey + ""; filename="" + path.basename(fileKeyValue[i].urlValue) + ""rn" + "Content-Transfer-Encoding: binaryrnrn";
   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
//http://nodejs.org/api/http.html#http_http_request_options_callback
var 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");

node nodejsPostFile.js