| /* |
| * Copyright (C) 2009-2010, Google Inc. and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.http.server; |
| |
| import static javax.servlet.http.HttpServletResponse.SC_NOT_FOUND; |
| import static javax.servlet.http.HttpServletResponse.SC_NOT_MODIFIED; |
| import static org.eclipse.jgit.http.server.ServletUtils.getRepository; |
| import static org.eclipse.jgit.util.HttpSupport.HDR_ETAG; |
| import static org.eclipse.jgit.util.HttpSupport.HDR_IF_MODIFIED_SINCE; |
| import static org.eclipse.jgit.util.HttpSupport.HDR_IF_NONE_MATCH; |
| import static org.eclipse.jgit.util.HttpSupport.HDR_LAST_MODIFIED; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.time.Instant; |
| |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.eclipse.jgit.internal.storage.file.ObjectDirectory; |
| import org.eclipse.jgit.lib.Repository; |
| |
| /** Sends any object from {@code GIT_DIR/objects/??/0 38}, or any pack file. */ |
| abstract class ObjectFileServlet extends HttpServlet { |
| private static final long serialVersionUID = 1L; |
| |
| static class Loose extends ObjectFileServlet { |
| private static final long serialVersionUID = 1L; |
| |
| Loose() { |
| super("application/x-git-loose-object"); |
| } |
| |
| @Override |
| String etag(FileSender sender) throws IOException { |
| Instant lastModified = sender.getLastModified(); |
| return Long.toHexString(lastModified.getEpochSecond()) |
| + Long.toHexString(lastModified.getNano()); |
| } |
| } |
| |
| private abstract static class PackData extends ObjectFileServlet { |
| private static final long serialVersionUID = 1L; |
| |
| PackData(String contentType) { |
| super(contentType); |
| } |
| |
| @Override |
| String etag(FileSender sender) throws IOException { |
| return sender.getTailChecksum(); |
| } |
| } |
| |
| static class Pack extends PackData { |
| private static final long serialVersionUID = 1L; |
| |
| Pack() { |
| super("application/x-git-packed-objects"); |
| } |
| } |
| |
| static class PackIdx extends PackData { |
| private static final long serialVersionUID = 1L; |
| |
| PackIdx() { |
| super("application/x-git-packed-objects-toc"); |
| } |
| } |
| |
| private final String contentType; |
| |
| ObjectFileServlet(String contentType) { |
| this.contentType = contentType; |
| } |
| |
| abstract String etag(FileSender sender) throws IOException; |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void doGet(final HttpServletRequest req, |
| final HttpServletResponse rsp) throws IOException { |
| serve(req, rsp, true); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected void doHead(final HttpServletRequest req, |
| final HttpServletResponse rsp) throws ServletException, IOException { |
| serve(req, rsp, false); |
| } |
| |
| private void serve(final HttpServletRequest req, |
| final HttpServletResponse rsp, final boolean sendBody) |
| throws IOException { |
| final File obj = new File(objects(req), req.getPathInfo()); |
| final FileSender sender; |
| try { |
| sender = new FileSender(obj); |
| } catch (FileNotFoundException e) { |
| rsp.sendError(SC_NOT_FOUND); |
| return; |
| } |
| |
| try { |
| final String etag = etag(sender); |
| // HTTP header Last-Modified header has a resolution of 1 sec, see |
| // https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.29 |
| final long lastModified = sender.getLastModified().getEpochSecond(); |
| |
| String ifNoneMatch = req.getHeader(HDR_IF_NONE_MATCH); |
| if (etag != null && etag.equals(ifNoneMatch)) { |
| rsp.sendError(SC_NOT_MODIFIED); |
| return; |
| } |
| |
| long ifModifiedSince = req.getDateHeader(HDR_IF_MODIFIED_SINCE); |
| if (0 < lastModified && lastModified < ifModifiedSince) { |
| rsp.sendError(SC_NOT_MODIFIED); |
| return; |
| } |
| |
| if (etag != null) |
| rsp.setHeader(HDR_ETAG, etag); |
| if (0 < lastModified) |
| rsp.setDateHeader(HDR_LAST_MODIFIED, lastModified); |
| rsp.setContentType(contentType); |
| sender.serve(req, rsp, sendBody); |
| } finally { |
| sender.close(); |
| } |
| } |
| |
| private static File objects(HttpServletRequest req) { |
| final Repository db = getRepository(req); |
| return ((ObjectDirectory) db.getObjectDatabase()).getDirectory(); |
| } |
| } |