move StaticResourceServlet to package sonia.scm

scm-webapp/src/main/java/sonia/scm/StaticResourceServlet.java

@@ -0,0 +1,50 @@
+package sonia.scm;
+
+import com.github.sdorra.webresources.CacheControl;
+import com.github.sdorra.webresources.WebResourceSender;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import sonia.scm.util.HttpUtil;
+
+import javax.inject.Singleton;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+/**
+ * Serves static resources from servlet context.
+ */
+@Singleton
+public class StaticResourceServlet extends HttpServlet {
+
+  private static final Logger LOG = LoggerFactory.getLogger(StaticResourceServlet.class);
+
+  private final WebResourceSender sender = WebResourceSender.create()
+    .withGZIP()
+    .withGZIPMinLength(512)
+    .withBufferSize(16384)
+    .withCacheControl(CacheControl.create().noCache());
+
+  @Override
+  protected void doGet(HttpServletRequest request, HttpServletResponse response) {
+    try {
+      URL resource = createResourceUrlFromRequest(request);
+      if (resource != null) {
+        sender.resource(resource).get(request, response);
+      } else {
+        response.setStatus(HttpServletResponse.SC_NOT_FOUND);
+      }
+    } catch (IOException ex) {
+      LOG.warn("failed to serve resource", ex);
+      response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+    }
+  }
+
+  private URL createResourceUrlFromRequest(HttpServletRequest request) throws MalformedURLException {
+    String uri = HttpUtil.getStrippedURI(request);
+    return request.getServletContext().getResource(uri);
+  }
+}