Category: and

how to store and delete s3 image using node js


const s3 = new AWS.S3(
  {  accessKeyId: IAM_USER_KEY,  /* required */# Put your iam user key 
   secretAccessKey: IAM_USER_SECRET, /* required */  # Put your iam user secret key
   Bucket: BUCKET_NAME     /* required */     # Put your bucket name
  }
);
s3.deleteObject({
  Bucket: MY_BUCKET,
  Key: 'some/subfolders/nameofthefile1.extension'
},function (err,data){})

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how to setItem and getItem in javascript in localStorage


function set(){
    var sendJSON = JSON.stringify(allMovie);
    localStorage.setItem('allMovie',sendJSON)
}
​
function get(){
    var getJSON = localStorage.getItem('allMovie');
    if (getJSON){
        allMovie = JSON.parse(getJSON)
    }
​
}

localStorage.getItem('bgcolor');

//localStorage is an object, so values are stored by key name
//data from localStorage is always stored in strings
//usually the values at each key are stringified objects in JSON format, therefore we must parse them
var data = JSON.parse(localStorage.getItem("key name"));//make sure the "key name" exists in the localStorage

var KeyName = window.localStorage.key(index);

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how to set file type and size in multer


var multer = require('multer')
var upload = multer().single('avatar')
​
app.post('/profile', function (req, res) {
  upload(req, res, function (err) {
    if (err instanceof multer.MulterError) {
      // A Multer error occurred when uploading.
    } else if (err) {
      // An unknown error occurred when uploading.
    }
​
    // Everything went fine.
  })
})
​

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How to send JSON Web Token (JWT Token) as header with Postman and golang


func ProtectedEndpoint(w http.ResponseWriter, req *http.Request) {
    params := req.URL.Query()
    token, _ := jwt.Parse(params["token"][0], func(token *jwt.Token) (interface{}, error) {
        if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
            return nil, fmt.Errorf("There was an error")
        }
        return []byte("secret"), nil
    })
    if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
        var user User
        mapstructure.Decode(claims, &user)
        json.NewEncoder(w).Encode(user)
    } else {
        json.NewEncoder(w).Encode(Exception{Message: "Invalid authorization token"})
    }
}
​

func CreateTokenEndpoint(w http.ResponseWriter, req *http.Request) {
    var user User
    _ = json.NewDecoder(req.Body).Decode(&user)
    token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
        "username": user.Username,
    })
    tokenString, error := token.SignedString([]byte("secret"))
    if error != nil {
        fmt.Println(error)
    }
    json.NewEncoder(w).Encode(JwtToken{Token: tokenString})
}
​

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