node.js - Modify image obtained from loopback-component-storage -

i using loopback storing image server.

i want modify file name of file before getting saved server.

also want convert thumbnail form before getting saved.

here how doing.

at client side

upload.upload( {     url: '/api/containers/container_name/upload',     file: file,     filename: "demoimage.jpg",     //additional data file     params:{      orderid: 1,       customerid: 1     } }); 

at server side receiving query "params" not getting "file name"

my storage model name container

container.beforeremote('upload', function(ctx,  modelinstance, next) {      //ouptuts: {orderid:1, customerid:1]}     console.log(ctx.req.query);      //now want change file name of file.     //but not getting how      next(); }) 

how change file name of file getting saved @ server?

i figured out.

we have define custom function getfilename in boot/configure-storage.js.

suppose datasource loopback-component-storage presimage.

server/boot/configure-storage.js

module.exports = function(app) {     //function checking file type..     app.datasources.presimage.connector.getfilename = function(file, req, res) {          //first checking file type..         var pattern = /^image\/.+$/;         var value = pattern.test(file.type);         if(value ){             var fileextension = file.name.split('.').pop();             var container = file.container;             var time = new date().gettime();             var query = req.query;             var customerid = query.customerid;             var orderid    = query.orderid;              //now preparing file name..             //customerid_time_orderid.extension             var newfilename = '' + customerid + '_' + time + '_' + orderid + '.' + fileextension;               //and file name saved defined..             return newfilename;         }         else{             throw "filetypeerror: file of image type accepted.";         }     }; } 

common/models/container.js

now suppose container model container.

module.exports = function(container) {     container.afterremote('upload', function(ctx,  modelinstance, next) {       var files = ctx.result.result.files.file;        for(var i=0; i<files.length; i++){         var modifiedfilename = files[i].name;         console.log(modifiedfilename) //outputs modified file name.       } //for loop       next();     }); //afterremote.. }; 

now converting images thumbnail size

download quickthumb

here how use loopback.

this code copied directly loopback thumbnail view

common/models/container.js

module.exports = function(container) {      var qt = require('quickthumb');      container.afterremote('upload', function(ctx, res, next) {          var file = res.result.files.file[0];         var file_path = "./server/storage/" + file.container + "/" + file.name;         var file_thumb_path = "./server/storage/" + file.container + "/thumb/" + file.name;          qt.convert({             src: file_path,             dst: file_thumb_path,             width: 100         }, function (err, path) {          });          next();     });  };