RESTEasy – Enable Gzip Compression Content Encoding

JAX-RS Resteasy has automatic GZIP decompression support. If the client framework or a JAX-RS service receives a message body with a Content-Encoding of “gzip”, it will automatically decompress it. The client framework automatically sets the Accept-Encoding header to be “gzip, deflate”. So you do not have to set this header yourself.

To use gzip compression, use @GZIP annotation in following manner.

	//Output compression
	@GET
	@Path("/users")
	@GZIP
	@Produces("application/xml")
	public Users getAllUsers() 
	{
		//more code....
	}
	
	//OR
	
	//Input compression
	@POST
	@Path("/users")
	@Consumes("application/vnd.com.demo.user-management.user+xml;charset=UTF-8;version=1")
	public Response createUser(@GZIP User user,
			@DefaultValue("false") @QueryParam("allow-admin") boolean allowAdmin)
			throws URISyntaxException 
	{
		//More code...
	}

Example Usages

Example API output without gzip compression, when calling above GET REST API, will be as follows:

	Date: Sat, 03 Aug 2013 06:18:41 GMT
	Server: Apache-Coyote/1.1
	Content-Length: 277
	Content-Type: application/vnd.com.demo.user-management.users+xml;version="1";charset=UTF-8

Example API output with gzip compression using @GZIP annotation

Date: Sat, 03 Aug 2013 06:31:21 GMT
Content-Encoding: gzip
Server: Apache-Coyote/1.1
Content-Length: 165
Content-Type: application/vnd.com.demo.user-management.users+xml;version="1";charset=UTF-8

Drop me a comment, something is not clear from the post.

Happy Learning !!