Complex string in Javascript-CodePudding

I want to send my code to this API to compile. But it throws an error cuz there is \n in my string. How can I set this string in my header?

xhr.setRequestHeader('code', 'n = 5\nwhile n > 0:\n   n -= 1\n   print(n)');

xhr.setRequestHeader('code', 
'n = 5
while n > 0:
    n -= 1
    print(n)'
);

This is the error I get :

Uncaught DOMException: Failed to execute 'setRequestHeader' on 'XMLHttpRequest': 'n = 5
while n > 0:
 n -= 1
 print(n)' is not a valid HTTP header field value.

CodePudding user response：

You are not allowed to use symbol of new line in header value.

However, you can come up with a certain sequence of characters yourself, which the backend will regard as a newline character and automatically replace this sequence with a newline.

But it is better, of course, to transmit such things in the HTTP POST request body, and not in the headers.