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
        }
    }
})