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Add jax rs response filter for gzip compression

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This commit is contained in:
René Pfeuffer
2018-10-04 09:30:51 +02:00
parent 11383db0b0
commit 75aea05a8a
2 changed files with 30 additions and 1 deletions
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23
scm-core/src/main/java/sonia/scm/filter/GZipResponseFilter.java Normal file
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@@ -0,0 +1,23 @@
package sonia.scm.filter;
import lombok.extern.slf4j.Slf4j;
import sonia.scm.util.WebUtil;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;
import javax.ws.rs.ext.Provider;
import java.io.IOException;
import java.util.zip.GZIPOutputStream;
@Provider
@Slf4j
public class GZipResponseFilter implements ContainerResponseFilter {
public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) throws IOException {
if (WebUtil.isGzipSupported(requestContext::getHeaderString)) {
log.trace("compress output with gzip");
GZIPOutputStream wrappedResponse = new GZIPOutputStream(responseContext.getEntityStream());
responseContext.setEntityStream(wrappedResponse);
}
}
}

8
scm-core/src/main/java/sonia/scm/util/WebUtil.java
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@@ -49,6 +49,7 @@ import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import java.util.function.Function;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@@ -266,7 +267,12 @@ public final class WebUtil
*/
public static boolean isGzipSupported(HttpServletRequest request)
{
String enc = request.getHeader(HEADER_ACCEPTENCODING);
return isGzipSupported(request::getHeader);
}
public static boolean isGzipSupported(Function<String, String> headerResolver)
{
String enc = headerResolver.apply(HEADER_ACCEPTENCODING);
return (enc != null) && enc.contains("gzip");
}