[FIXED] Correct way to write header has multi values in Java web

Issue

I am handling HTTP header 'Content-Language' for multi languages. I have 2 ways:

1. WAY1:

    // setHeader
    response.setHeader("Content-Language", "en, fr"); // Using ',' as seperator
   

2. WAY2:

    // addHeader ----- Not setHeader
   
    response.addHeader("Content-Language", "en");
    response.addHeader("Content-Language", "fr");
   

My question is: Are these two ways equivalent? Which one should be used?

Thank you!

Solution

You can use both variants. In both cases a response header Content-Language: en, fr will be sent.

Calling response.addHeader multiple times for the same header name produces a concatenated version of the header values separated by a ", ".

Answered By - wero
Answer Checked By - Gilberto Lyons (JavaFixing Admin)