nodejs express 框架 上传文件

web 项目应用express4.0框架

html 表单post 文件上传失败，后端无法获取提交文件

express不支持文件上传。

方式一

若是图片，可以将图片转码为BASE64上传

  前端框架angularjs代码 转换代码如下

 $scope.filechange=function(index){

        var file = this.files[0];

        var url = webkitURL.createObjectURL(file);

        /* 生成图片

         * ---------------------- */

        var $img = new Image();

        $img.src = url;

        $img.onload = function () {

            //生成比例

            var width = this.width,

                height = this.height,

                scale = width / height;

            width = parseInt(800);

            height = parseInt(width / scale);

            //生成canvas

            var $canvas = $('#canvas');

            var ctx = $canvas[0].getContext('2d');

            $canvas.attr({ width: width, height: height });

            ctx.drawImage($img, 0, 0, width, height);

            var base64 = $canvas[0].toDataURL('image/jpeg', 0.5);

            var cc = $("#pic" + index);

            cc.attr("src", url);

            postdata["file" + index] = base64.substr(23);

        }



    }

    $scope.upload=function(){

        $http.post('UploadFile/FenXiangImg?wxopenid=222&orderid=111&templateid=1',$scope.postdata).success(function(data) {

            alert("sucess");

        });

    }

 

方式二

nodejs 后端引用connect-multiparty包

后端代码如下

路由

 var multipart = require('connect-multiparty');

    var multipartMiddleware = multipart();

    app.post('/q/people/insertPeoples', multipartMiddleware, function(req, res) {

        if(req.session&&req.session.account) {

            var filepath=req.files.peoples.path;

            console.log(req);

            People.insertPeoples(req,res,filepath);

        }

        else{

            res.send({error:1})

        }



    });

业务逻辑实现

function insertPeoples(req,res,filepath) {

    basemodule.checkAccountRole(req,res,function(account) {

        fs.readFile(filepath, function (err, filedata) {

            console.log(err +filedata);

            csv.parse(filedata, {comment: '#'}, function(err, output){

                fs.unlink(filepath, function (err) {

                });

                var allpeoples=[];

                var keys=['_id','idcard','wechatuid','qqnum','mac','name'];

                console.log(JSON.stringify(output));

                output.forEach(function(people){

                    var peopleobj={};

                    for(var i =0;i<keys.length;i++){

                        peopleobj[keys[i]]=people[i];

                    }

                    if(peopleobj.mac){

                        peopleobj.mac=peopleobj.mac.toUpperCase();

                    }

                    allpeoples.push(peopleobj);

                });

                if(allpeoples.length>0){

                    db.insertPeoples(allpeoples,account,function(err,doc){

                        if(!err){

                            res.redirect('/#people');



                        }else{res.send({error:1})}

                    })

                }

                else{

                    res.redirect('/#people');

                }

            });

        });

    })

}