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Document information

Document ID:	5334
Subject:	How to add custom headers in HTTP response
Creation date:	1/2/20 11:15 AM
Last modified on:	1/2/20 11:17 AM

Adding Custom Headers in HTTP Response

Companies often want to add custom headers in HTTP response to make the communication more secure.

There are two types of custom headers:

• Hard-coded with a default value
• User Defined

Hard-coded Headers

These headers are already present in the response but their presence can be overwritten by specifying a value in server.properties file. Following tables lists their name and default values:

Parameter in server.properties	Header Name	Header Value
use.strict.transport.security.4https	Strict-Transport-Security	max-age=86400
use.x-frame.options	x-frame-options	SAMEORIGIN
use.x-xss.protection	X-XSS-Protection	1; mode=block
use.x-content.type.options	X-Content-Type-Options	nosniff
use.referrer-policy	Referrer-Policy	no-referrer
use.http.public.key.pins	Public-Key-Pins	Dynamically generated

Changing Values for Default Headers

Assume you want to change the value for the Referrer-Policy from no-referrer to origin. Add the following lines in server.properties file.

use.referrer-policy=false

Then, use the CustomHttpHeaders.txt file to specify the new value. (See below).

Adding User Defined Headers

• Add a new text file called CustomHttpHeaders.txt in $INSTALL_DIR\config folder.
• Every line in this file can hold a single pair of Header Name/Value. For example:

  Cache-Control: no-cache

• Save the file
• Restart Syncrify/SynaMan

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