1 files changed, 0 insertions, 334 deletions
diff --git a/gerrit-httpd/src/main/java/com/google/gerrit/httpd/raw/ResourceServlet.java b/gerrit-httpd/src/main/java/com/google/gerrit/httpd/raw/ResourceServlet.java
deleted file mode 100644
index 3ec6bdbd73..0000000000
--- a/gerrit-httpd/src/main/java/com/google/gerrit/httpd/raw/ResourceServlet.java
+++ /dev/null
@@ -1,334 +0,0 @@
-// Copyright (C) 2015 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package com.google.gerrit.httpd.raw;
-
-import static com.google.common.base.Preconditions.checkNotNull;
-import static com.google.common.net.HttpHeaders.CONTENT_ENCODING;
-import static com.google.common.net.HttpHeaders.ETAG;
-import static com.google.common.net.HttpHeaders.IF_MODIFIED_SINCE;
-import static com.google.common.net.HttpHeaders.IF_NONE_MATCH;
-import static com.google.common.net.HttpHeaders.LAST_MODIFIED;
-import static java.util.concurrent.TimeUnit.DAYS;
-import static java.util.concurrent.TimeUnit.MINUTES;
-import static javax.servlet.http.HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
-import static javax.servlet.http.HttpServletResponse.SC_NOT_FOUND;
-import static javax.servlet.http.HttpServletResponse.SC_NOT_MODIFIED;
-
-import com.google.common.annotations.VisibleForTesting;
-import com.google.common.base.CharMatcher;
-import com.google.common.cache.Cache;
-import com.google.common.collect.ImmutableMap;
-import com.google.common.hash.Hashing;
-import com.google.gerrit.common.Nullable;
-import com.google.gerrit.httpd.HtmlDomUtil;
-import com.google.gwtexpui.server.CacheHeaders;
-import com.google.gwtjsonrpc.server.RPCServletUtils;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.nio.file.Files;
-import java.nio.file.NoSuchFileException;
-import java.nio.file.Path;
-import java.nio.file.attribute.FileTime;
-import java.util.concurrent.Callable;
-import java.util.concurrent.ExecutionException;
-import java.util.zip.GZIPOutputStream;
-import javax.servlet.http.HttpServlet;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * Base class for serving static resources.
- *
- * <p>Supports caching, ETags, basic content type detection, and limited gzip compression.
- */
-public abstract class ResourceServlet extends HttpServlet {
-  private static final long serialVersionUID = 1L;
-
-  private static final Logger log = LoggerFactory.getLogger(ResourceServlet.class);
-
-  private static final int CACHE_FILE_SIZE_LIMIT_BYTES = 100 << 10;
-
-  private static final String JS = "application/x-javascript";
-  private static final ImmutableMap<String, String> MIME_TYPES =
-      ImmutableMap.<String, String>builder()
-          .put("css", "text/css")
-          .put("gif", "image/gif")
-          .put("htm", "text/html")
-          .put("html", "text/html")
-          .put("ico", "image/x-icon")
-          .put("jpeg", "image/jpeg")
-          .put("jpg", "image/jpeg")
-          .put("js", JS)
-          .put("pdf", "application/pdf")
-          .put("png", "image/png")
-          .put("rtf", "text/rtf")
-          .put("svg", "image/svg+xml")
-          .put("text", "text/plain")
-          .put("tif", "image/tiff")
-          .put("tiff", "image/tiff")
-          .put("txt", "text/plain")
-          .put("woff", "font/woff")
-          .put("woff2", "font/woff2")
-          .build();
-
-  protected static String contentType(String name) {
-    int dot = name.lastIndexOf('.');
-    String ext = 0 < dot ? name.substring(dot + 1) : "";
-    String type = MIME_TYPES.get(ext);
-    return type != null ? type : "application/octet-stream";
-  }
-
-  private final Cache<Path, Resource> cache;
-  private final boolean refresh;
-  private final boolean cacheOnClient;
-  private final int cacheFileSizeLimitBytes;
-
-  protected ResourceServlet(Cache<Path, Resource> cache, boolean refresh) {
-    this(cache, refresh, true, CACHE_FILE_SIZE_LIMIT_BYTES);
-  }
-
-  protected ResourceServlet(Cache<Path, Resource> cache, boolean refresh, boolean cacheOnClient) {
-    this(cache, refresh, cacheOnClient, CACHE_FILE_SIZE_LIMIT_BYTES);
-  }
-
-  @VisibleForTesting
-  ResourceServlet(
-      Cache<Path, Resource> cache,
-      boolean refresh,
-      boolean cacheOnClient,
-      int cacheFileSizeLimitBytes) {
-    this.cache = checkNotNull(cache, "cache");
-    this.refresh = refresh;
-    this.cacheOnClient = cacheOnClient;
-    this.cacheFileSizeLimitBytes = cacheFileSizeLimitBytes;
-  }
-
-  /**
-   * Get the resource path on the filesystem that should be served for this request.
-   *
-   * @param pathInfo result of {@link HttpServletRequest#getPathInfo()}.
-   * @return path where static content can be found.
-   * @throws IOException if an error occurred resolving the resource.
-   */
-  protected abstract Path getResourcePath(String pathInfo) throws IOException;
-
-  protected FileTime getLastModifiedTime(Path p) throws IOException {
-    return Files.getLastModifiedTime(p);
-  }
-
-  @Override
-  protected void doGet(HttpServletRequest req, HttpServletResponse rsp) throws IOException {
-    String name;
-    if (req.getPathInfo() == null) {
-      name = "/";
-    } else {
-      name = CharMatcher.is('/').trimFrom(req.getPathInfo());
-    }
-    if (isUnreasonableName(name)) {
-      notFound(rsp);
-      return;
-    }
-    Path p = getResourcePath(name);
-    if (p == null) {
-      notFound(rsp);
-      return;
-    }
-
-    Resource r = cache.getIfPresent(p);
-    try {
-      if (r == null) {
-        if (maybeStream(p, req, rsp)) {
-          return; // Bypass cache for large resource.
-        }
-        r = cache.get(p, newLoader(p));
-      }
-      if (refresh && r.isStale(p, this)) {
-        cache.invalidate(p);
-        r = cache.get(p, newLoader(p));
-      }
-    } catch (ExecutionException e) {
-      log.warn("Cannot load static resource {}", req.getPathInfo(), e);
-      CacheHeaders.setNotCacheable(rsp);
-      rsp.setStatus(SC_INTERNAL_SERVER_ERROR);
-      return;
-    }
-    if (r == Resource.NOT_FOUND) {
-      notFound(rsp); // Cached not found response.
-      return;
-    }
-
-    String e = req.getParameter("e");
-    if (e != null && !r.etag.equals(e)) {
-      CacheHeaders.setNotCacheable(rsp);
-      rsp.setStatus(SC_NOT_FOUND);
-      return;
-    } else if (cacheOnClient && r.etag.equals(req.getHeader(IF_NONE_MATCH))) {
-      rsp.setStatus(SC_NOT_MODIFIED);
-      return;
-    }
-
-    byte[] tosend = r.raw;
-    if (!r.contentType.equals(JS) && RPCServletUtils.acceptsGzipEncoding(req)) {
-      byte[] gz = HtmlDomUtil.compress(tosend);
-      if ((gz.length + 24) < tosend.length) {
-        rsp.setHeader(CONTENT_ENCODING, "gzip");
-        tosend = gz;
-      }
-    }
-
-    if (cacheOnClient) {
-      rsp.setHeader(ETAG, r.etag);
-    } else {
-      CacheHeaders.setNotCacheable(rsp);
-    }
-    if (!CacheHeaders.hasCacheHeader(rsp)) {
-      if (e != null && r.etag.equals(e)) {
-        CacheHeaders.setCacheable(req, rsp, 360, DAYS, false);
-      } else {
-        CacheHeaders.setCacheable(req, rsp, 15, MINUTES, refresh);
-      }
-    }
-    rsp.setContentType(r.contentType);
-    rsp.setContentLength(tosend.length);
-    try (OutputStream out = rsp.getOutputStream()) {
-      out.write(tosend);
-    }
-  }
-
-  @Nullable
-  Resource getResource(String name) {
-    try {
-      Path p = getResourcePath(name);
-      if (p == null) {
-        log.warn("Path doesn't exist {}", name);
-        return null;
-      }
-      return cache.get(p, newLoader(p));
-    } catch (ExecutionException | IOException e) {
-      log.warn("Cannot load static resource {}", name, e);
-      return null;
-    }
-  }
-
-  private static void notFound(HttpServletResponse rsp) {
-    rsp.setStatus(SC_NOT_FOUND);
-    CacheHeaders.setNotCacheable(rsp);
-  }
-
-  /**
-   * Maybe stream a path to the response, depending on the properties of the file and cache headers
-   * in the request.
-   *
-   * @param p path to stream
-   * @param req HTTP request.
-   * @param rsp HTTP response.
-   * @return true if the response was written (either the file contents or an error); false if the
-   *     path is too small to stream and should be cached.
-   */
-  private boolean maybeStream(Path p, HttpServletRequest req, HttpServletResponse rsp)
-      throws IOException {
-    try {
-      if (Files.size(p) < cacheFileSizeLimitBytes) {
-        return false;
-      }
-    } catch (NoSuchFileException e) {
-      cache.put(p, Resource.NOT_FOUND);
-      notFound(rsp);
-      return true;
-    }
-
-    long lastModified = getLastModifiedTime(p).toMillis();
-    if (req.getDateHeader(IF_MODIFIED_SINCE) >= lastModified) {
-      rsp.setStatus(SC_NOT_MODIFIED);
-      return true;
-    }
-
-    if (lastModified > 0) {
-      rsp.setDateHeader(LAST_MODIFIED, lastModified);
-    }
-    if (!CacheHeaders.hasCacheHeader(rsp)) {
-      CacheHeaders.setCacheable(req, rsp, 15, MINUTES, refresh);
-    }
-    rsp.setContentType(contentType(p.toString()));
-
-    OutputStream out = rsp.getOutputStream();
-    GZIPOutputStream gz = null;
-    if (RPCServletUtils.acceptsGzipEncoding(req)) {
-      rsp.setHeader(CONTENT_ENCODING, "gzip");
-      gz = new GZIPOutputStream(out);
-      out = gz;
-    }
-    Files.copy(p, out);
-    if (gz != null) {
-      gz.finish();
-    }
-    return true;
-  }
-
-  private static boolean isUnreasonableName(String name) {
-    return name.length() < 1
-        || name.contains("\\") // no windows/dos style paths
-        || name.startsWith("../") // no "../etc/passwd"
-        || name.contains("/../") // no "foo/../etc/passwd"
-        || name.contains("/./") // "foo/./foo" is insane to ask
-        || name.contains("//"); // windows UNC path can be "//..."
-  }
-
-  private Callable<Resource> newLoader(Path p) {
-    return () -> {
-      try {
-        return new Resource(
-            getLastModifiedTime(p), contentType(p.toString()), Files.readAllBytes(p));
-      } catch (NoSuchFileException e) {
-        return Resource.NOT_FOUND;
-      }
-    };
-  }
-
-  public static class Resource {
-    static final Resource NOT_FOUND = new Resource(FileTime.fromMillis(0), "", new byte[] {});
-
-    final FileTime lastModified;
-    final String contentType;
-    final String etag;
-    final byte[] raw;
-
-    Resource(FileTime lastModified, String contentType, byte[] raw) {
-      this.lastModified = checkNotNull(lastModified, "lastModified");
-      this.contentType = checkNotNull(contentType, "contentType");
-      this.raw = checkNotNull(raw, "raw");
-      this.etag = Hashing.murmur3_128().hashBytes(raw).toString();
-    }
-
-    boolean isStale(Path p, ResourceServlet rs) throws IOException {
-      FileTime t;
-      try {
-        t = rs.getLastModifiedTime(p);
-      } catch (NoSuchFileException e) {
-        return this != NOT_FOUND;
-      }
-      return t.toMillis() == 0 || lastModified.toMillis() == 0 || !lastModified.equals(t);
-    }
-  }
-
-  public static class Weigher implements com.google.common.cache.Weigher<Path, Resource> {
-    @Override
-    public int weigh(Path p, Resource r) {
-      return 2 * p.toString().length() + r.raw.length;
-    }
-  }
-}