nodeJS 服務端文件上傳

var http = require('http');
var path = require('path');
var fs = require('fs');

function uploadFile(fileKey,absPath){

    var req = http.request(genUploadOption(), function(res){
        // console.log("RES:" + res);
        console.log('STATUS: ' + res.statusCode);
        // console.log('HEADERS: ' + JSON.stringify(res.headers));

        res.on("data", function(chunk){
            console.log("響應信息:" + chunk);
        })
    })

    req.on('error', function(e){
        console.log('上傳出現錯誤：' + e.message);
        console.log(e);
    })

    var boundaryKey = Math.random().toString(16);
    var endData = '\r\n----' + boundaryKey + '--';

    var content = "\r\n----" + boundaryKey + "\r\n"
        + "Content-Type: application/octet-stream\r\n"
        + "Content-Disposition: form-data; name=\"" + fileKey + "\"; filename=\"" + path.basename(absPath)
        + "\"\r\n" + "Content-Transfer-Encoding: binary\r\n\r\n";

    var contentBinary = new Buffer(content, 'utf-8');

    var contentLength = 0;
    var stat = fs.statSync(absPath);
    contentLength += contentBinary.length;
    contentLength += stat.size;

    req.setHeader('Content-Type', 'multipart/form-data; boundary=--' + boundaryKey);
    req.setHeader('Content-Length', contentLength + Buffer.byteLength(endData));

    req.write(contentBinary);
    var fileStream = fs.createReadStream(absPath, {bufferSize : 4 * 1024});
    fileStream.pipe(req, {end: false});
    fileStream.on('end', function() {
        req.end(endData);
    });
}

function genUploadOption(){
    const ywid = '4499'; // 單據gid、憑證的billid
    const ywkey = 'fs~XTYWBILLIMAGE~' + ywid;
    const dataType = 2; // 1：憑證；2：單據；3：單據項目；4：管理對象；5：其它
    const typeId = "54020";
    const userCode = "388610";
    const dwdh = "0001";

    return {
        hostname: 'ygfs.ygsoft.com',
        port: 9080,
        path: "/grm/gris/contentmanage.collectStageServlet"
        + "?beanId=com.ygsoft.ecp.component.contentmanage.service.context.ICollectStageContext"
        + "&method=saveUploadFile"
        + "&needSave=true"
        + "&isScan=true"
        + "&nativeType=true"
        + "&needReturnValue=true"
        + "&ywKey=" + ywkey
        + "&ywid=" + ywid
        + "&dataType=" + dataType
        + "&billType=" + typeId
        + "&userCode=" + userCode
        + "&systemCode=GRIS"
        + "&systemId=00"
        + "&bizBillTypeId=11111111111111111111111111111111"
        + "&dwdh=" + dwdh
        + "&dateCode=00"
        + "&folderId=462844",

        method: 'POST'
    };
}

uploadFile("file1",'C:\\Users\\liwenjun\\Desktop\\OffLine.jpg');