String to array nodejs

Question

I format a string (I can format the string in any way)

e.g

   id1:234,id2:4566,id3:3000

then encrypt it and pass via query string

   ?qs=djdjdjfjf57577574h33h3h3hh3h3

then decrypt it on node

   id1:234,id2:4566,id3:3000

which is the best method to format the string and then turn it into an array in node

    arr[id1] = "234";
    arr[id2] = "4566";
    arr[id3] = "3000";

can I ask what is the context for this solution? What are you doing with it? — martskins
– martskins, Commented May 19, 2014 at 15:38
What are id1, id2 and id3 supposed to be in your example? They are not variables, but string literals right? — Amberlamps
– Amberlamps, Commented May 19, 2014 at 15:42
yes because I encrypt and decript a string for security,I do not want to pass values that can be haked — Alberto Alibaba
– Alberto Alibaba, Commented May 19, 2014 at 15:45
That example is so close to JSON that for me is the obvious next step to achieve what you want. — Pablo Lozano
– Pablo Lozano, Commented May 19, 2014 at 16:01

AbstractProblemFactory · Accepted Answer · 2014-05-19 16:18:51Z

4

I think you would like to use hashmap (object) instead of array: var obj = {} then try:

"id1:234,id2:4566,id3:3000".split(",").forEach(function(e){
    var record = e.split(":");
    obj[record[0]] = record[1];
})

which give you: {id1: "234", id2: "4566", id3: "3000"}

edited May 19, 2014 at 16:18

answered May 19, 2014 at 15:41

AbstractProblemFactory

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4 Comments

Amberlamps Over a year ago

There is no each function. You can use forEach, but this is not supported for <IE8.

AbstractProblemFactory Over a year ago

It will be on NodeJS side, I assumed there is "each" since on Chrome there is :)

Amberlamps Over a year ago

There is no each function as far as I can tell

AbstractProblemFactory Over a year ago

@Amberlamps edited, thanks (seems to site on which I ran console has that method in array).

Mehran Hatami · Accepted Answer · 2014-05-19 16:26:57Z

Firstly, what you have as your object model is more of a hash like object or simply a JavaScript object with keys and values, so the best way to do that is simply using JSON.parse.

So if you can do it as you said: I can format the string in any way, you better first change your formatting to have something like:

'{"id1":234,"id2":4566,"id3":3000}'

instead of :

id1:234,id2:4566,id3:3000

you can do it using JSON.stringify on the client side JavaScript using a JavaScript object without you needing to deal with string formatting:

//on the client side
var myObj = {};
myObj.id1 = 234;
myObj.id2 = 4566;
myObj.id3 = 3000;
var objStr = JSON.stringify(myObj);

let's say you encrypt your string using a function named encrypt:

var encryptedStr = encrypt(objStr);
//so now you should use encodeURI to be able to put it in the queryString
var queryStringParam = encodeURI(encryptedStr);

now you put the queryStringParam in the queryString.

Then on the node.js side, all you should do is parsing it as a JSON object. The other important point that you probably have considered doing it is using decodeURI. For the last step, let's say you are using e function named decrypt:

//the server-side code
var decryptedStr = decrypt(decodeURI(yourQueryString));
var obj = JSON.parse(decryptedStr);

Now obj is exactly what you want.

thanks It works! but if i put the client side part is useless to encrypt the string ;)

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