nodejs(express)处理图片上传

nodejs(express)处理图片上传

nodejs处理图片上传是要引入formidable模块。以下为express处理图片上传代码

    var form = new formidable.IncomingForm();   //创建上传表单
          form.encoding = 'utf-8';        //设置编辑
          form.uploadDir = 'images/upload';     //设置上传目录
          form.keepExtensions = true;     //保留后缀
          form.maxFieldsSize = 2 * 1024 * 1024;   //文件大小

          form.parse(req, function(err, fields, files) {

            if (err) {
              res.locals.error = err;
              res.render('index', { title: TITLE });
              return;
            }
            //console.log(files);

            var extName = 'png';  //后缀名
            switch (files.file.type) {
              case 'image/pjpeg':
                extName = 'jpg';
                break;
              case 'image/jpeg':
                extName = 'jpg';
                break;
              case 'image/png':
                extName = 'png';
                break;
              case 'image/x-png':
                extName = 'png';
                break;
            }

            if(extName.length == 0){
              res.locals.error = '只支持png和jpg格式图片';
              res.render('index', { title: TITLE });
              return;
            }
            //显示地址；
            var showUrl = files.file.path;
            res.json({
              "newPath":showUrl
            });
          });