node上传文件,上传图片(base64方法),服务端代码

tips:调用方法时,请try...catch...

 1.multiparty上传文件

 1 function uploadfile(request) {
    return new Promise(function(resolve, reject){
           var multiparty=require('multiparty'); //引入依赖
        var form = new multiparty.Form();
        //设置编码
        form.encoding = 'utf-8';
        //设置文件存储路径
        form.uploadDir = "static/files/";
        //设置单文件大小限制
        form.maxFilesSize = 20 * 1024 * 1024;
        //form.maxFields = 1000;  设置所有文件的大小总和
        //生成临时文件
        form.parse(request, function(err, fields, files) {
            if (err){
                console.log(err);
                reject({success:false})
            } else {
                console.log(files);    //文件对象
                   console.log(fields);   //附加字段参数
                if (!files||!files.file||files.file.length==0) {
                    reject({success:false});
                }
                resolve({success:true,path:files.file[0].path})
            }
        })
    })
}

2.base64上传图片

function uploadfilebase64(request) {
    return new Promise(function(resolve, reject){
        let fs =require('fs')
        let uuidV1=require('uuid/v1')   
        let imgData=request.body.imgData //前端以application/json形式传递
        let base64Data = imgData.replace(/^data:image\/png;base64,/,"");
        let dataBuffer = new Buffer(base64Data, 'base64');
        let uuid = uuidV1();
        let filePath = "static/files/"+uuid+".png";//定义文件路径及名称,无论是jpg还是png的都可以保存成png
        fs.writeFile(filePath, dataBuffer, function(err) {
            if(err){
                console.log(err);
                reject({success:false})
            }else{
                resolve({success:true,path:filePath})
            }
        });
    })
}

以上若有问题欢迎指正......

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