multer-hash

upload file save as hash that wraps around multer,the file name will also with height and width if is image

Installation

npm install multer-hash

Usage

const multerHash = require('multer-hash');
const app = require('express')();
const uploader = multerHash(config,function(err,req,res,next){
	
})
app.post('/yourpath',uploader)

config

same as multer:

• dest
• limits
• field(default as Filedata)

fileFilter

same as multer,also support file extension array

{
	fileFilter:['jpg','png']
}

cachePath

a cachePath for save file to calculate file hash and image size,will choose system cache path if not specify

result handling

get file path with hashed name in req.publicPath

const multerHash = require('multer-hash');
const uploader = multerHash(config,function(err,req,res,next){
	if(err){
		// handle err
	}else{
		const publicPath = req.publicPath;
		// handle result
	}
})

error handling

specify error code:

	ERROR_CODE = {
	  'IO': 'IO',
	  'INVALID_IMAGE': 'INVALID_IMAGE',
	  'LIMIT_FILE_SIZE': 'LIMIT_FILE_SIZE',
	  'LIMIT_UNEXPECTED_FILE': 'LIMIT_UNEXPECTED_FILE',
	  'UNKNOWN': 'UNKNOWN',
	}

###exmaple

const multerHash = require('multer-hash');
const ERROR_CODE = multerHash.ERROR_CODE;
const uploader = multerHash(config,function(err,req,res,next){
	if(err){
		const errorCode = err.code;
		if(errorCode === ERROR_CODE.IO){
			//handle your io error
		}
	}
})