How to send js array to servlet using ajax?

Question

I have a textarea where a user can enter 1 or more emails on there, each email separated by comma.

My js code:

    var emails = $("#emails").val().split(",");

    if (emails.length == 0)
    {
        window.alert("Enter an email address.");
        $("#emails").focus();
        return;
    }

    var valid = validateEmails(emails);
    var goodEmails = valid[0];
    var badEmails = valid[1];
    var json = JSON.stringify(goodEmails);

    $.ajax
    ({
        url: "/mfa/service/initiate_user",
        type: "POST",
        data: {"emails" : json},

The data I see:

["[email protected]","[email protected]]

What I was hoping for:

[email protected], [email protected]

The way I would handle it in the backend is basically stripping out the "[ ]" from it then stripping out the quotes from each email.

What is the proper way to send the emails to backend without those silly brackets and quotes?

What does validateEmails return? are the emails still split by ,? — quandrum
– quandrum, Commented Mar 4, 2013 at 22:42
@quandrum validateEmails() basically splits the emails string, then return a list of [good emails, bad emails] — iCodeLikeImDrunk
– iCodeLikeImDrunk, Commented Mar 4, 2013 at 22:46

travis · Accepted Answer · 2013-03-04 22:39:34Z

3

To get the form [email protected], [email protected] you can use the Array.join(delim) function.

Ex:

var emails = ["[email protected]", "[email protected]"];
var email_string = emails.join(", ");
// email_string:
// [email protected], [email protected]

However, I'd say you'd want to keep the emails as an array and do the follow:

var valid = validateEmails(emails);
var goodEmails = valid[0];
var badEmails = valid[1];

$.ajax
({
    url: "/mfa/service/initiate_user",
    type: "POST",
    data: {"emails" : goodEmails},
...

This will allow you to parse the JSON object coming back. Instead of having a string in emails you'll have an array. Not sure of your back-end but this may be an easier approach if you are already able to parse the JSON.

answered Mar 4, 2013 at 22:39

travis

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1 Comment

iCodeLikeImDrunk Over a year ago

ah the join! that seems to be workin. thanks! i have to use string, thats how our servlets are set up lol.

Atep · Accepted Answer · 2013-03-04 22:42:23Z

0

try to add header to ajax configuration:

headers: {'Content-type' : "application/json; charset=utf-8"}

answered Mar 4, 2013 at 22:42

Atep

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