Javascript encodeURIComponent and Java decode issue

Question

I have a certain text I am encoding in JS using encodeURIComponent. The original text is

weoowuyteeeee !_.

Test could you please resubmit again?

I am doing the following in my JS code before sending it.

var text = encodeURIComponent($("#txt11").val());

Should I not be doing that?

Once I encode it using encodeURIComponent, it becomes

weoowuyteeeee%2520!_.%252C%250A%250ATest%252C%2520%2520could%2520you%2520please%2520resubmit%2520again%253F

I'm trying to decrypt the same on the Java side using

String decodedString1 = URLDecoder.decode(myObject.getText(), "UTF-8");

but I see this as the output, not the original text. What am I doing wrong?

weoowuyteeeee%20!_.%2C%0A%0ATest%2C%20%20could%20you%20please%20resubmit%20again%3F

Updated the post. I am manually doing a encodeURIComponent. Should I not be doing that? — p0tta
– p0tta, Commented Apr 10, 2017 at 20:16
That completely depends on how your value is flowing. But it is somehow being encoded twice — SLaks
– SLaks, Commented Apr 10, 2017 at 20:27

Stenal P Jolly · Accepted Answer · 2017-04-10 19:56:56Z

3

You are encoding your data twice.

Initially, you have encoded your data and later it is encoded again.

Eg: Let your text be

Hello World

After encoding it becomes

Hello%20World

If you encode again it becomes

Hello%2520World

Reason

% from %20 is encoded to %25. So the space becomes %2520.

Normal AJAX can will automatically encode your data before sending to the server side. Check where the 2nd encoding is happening.

answered Apr 10, 2017 at 19:56

Stenal P Jolly

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3 Comments

Updated the post. I am manually doing a encodeURIComponent. Should I not be doing that?

Actually it doesn't seem like i'm double encoding. I am only encoding once in JS and decoding in Java.

You can clearly see that the data encoded is double encoded