123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309 |
- /*
- * Copyright (C) 2011, Google Inc.
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
- package org.eclipse.jgit.http.server;
-
- import static javax.servlet.http.HttpServletResponse.SC_FORBIDDEN;
- import static javax.servlet.http.HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
- import static javax.servlet.http.HttpServletResponse.SC_NOT_FOUND;
-
- import java.io.ByteArrayOutputStream;
- import java.io.IOException;
- import java.util.Arrays;
- import java.util.Collections;
- import java.util.List;
-
- import javax.servlet.ServletOutputStream;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
-
- import org.eclipse.jgit.lib.Constants;
- import org.eclipse.jgit.transport.PacketLineOut;
-
- /**
- * Utility functions for handling the Git-over-HTTP protocol.
- */
- public class GitSmartHttpTools {
- private static final String INFO_REFS = Constants.INFO_REFS;
-
- /** Name of the git-upload-pack service. */
- public static final String UPLOAD_PACK = "git-upload-pack";
-
- /** Name of the git-receive-pack service. */
- public static final String RECEIVE_PACK = "git-receive-pack";
-
- /** Content type supplied by the client to the /git-upload-pack handler. */
- public static final String UPLOAD_PACK_REQUEST_TYPE =
- "application/x-git-upload-pack-request";
-
- /** Content type returned from the /git-upload-pack handler. */
- public static final String UPLOAD_PACK_RESULT_TYPE =
- "application/x-git-upload-pack-result";
-
- /** Content type supplied by the client to the /git-receive-pack handler. */
- public static final String RECEIVE_PACK_REQUEST_TYPE =
- "application/x-git-receive-pack-request";
-
- /** Content type returned from the /git-receive-pack handler. */
- public static final String RECEIVE_PACK_RESULT_TYPE =
- "application/x-git-receive-pack-result";
-
- /** Git service names accepted by the /info/refs?service= handler. */
- public static final List<String> VALID_SERVICES =
- Collections.unmodifiableList(Arrays.asList(new String[] {
- UPLOAD_PACK, RECEIVE_PACK }));
-
- private static final String INFO_REFS_PATH = "/" + INFO_REFS;
- private static final String UPLOAD_PACK_PATH = "/" + UPLOAD_PACK;
- private static final String RECEIVE_PACK_PATH = "/" + RECEIVE_PACK;
-
- private static final List<String> SERVICE_SUFFIXES =
- Collections.unmodifiableList(Arrays.asList(new String[] {
- INFO_REFS_PATH, UPLOAD_PACK_PATH, RECEIVE_PACK_PATH }));
-
- /**
- * Check a request for Git-over-HTTP indicators.
- *
- * @param req
- * the current HTTP request that may have been made by Git.
- * @return true if the request is likely made by a Git client program.
- */
- public static boolean isGitClient(HttpServletRequest req) {
- return isInfoRefs(req) || isUploadPack(req) || isReceivePack(req);
- }
-
- /**
- * Send an error to the Git client or browser.
- * <p>
- * Server implementors may use this method to send customized error messages
- * to a Git protocol client using an HTTP 200 OK response with the error
- * embedded in the payload. If the request was not issued by a Git client,
- * an HTTP response code is returned instead.
- *
- * @param req
- * current request.
- * @param res
- * current response.
- * @param httpStatus
- * HTTP status code to set if the client is not a Git client.
- * @throws IOException
- * the response cannot be sent.
- */
- public static void sendError(HttpServletRequest req,
- HttpServletResponse res, int httpStatus) throws IOException {
- sendError(req, res, httpStatus, null);
- }
-
- /**
- * Send an error to the Git client or browser.
- * <p>
- * Server implementors may use this method to send customized error messages
- * to a Git protocol client using an HTTP 200 OK response with the error
- * embedded in the payload. If the request was not issued by a Git client,
- * an HTTP response code is returned instead.
- *
- * @param req
- * current request.
- * @param res
- * current response.
- * @param httpStatus
- * HTTP status code to set if the client is not a Git client.
- * @param textForGit
- * plain text message to display on the user's console. This is
- * shown only if the client is likely to be a Git client. If null
- * or the empty string a default text is chosen based on the HTTP
- * response code.
- * @throws IOException
- * the response cannot be sent.
- */
- public static void sendError(HttpServletRequest req,
- HttpServletResponse res, int httpStatus, String textForGit)
- throws IOException {
- if (textForGit == null || textForGit.length() == 0) {
- switch (httpStatus) {
- case SC_FORBIDDEN:
- textForGit = HttpServerText.get().repositoryAccessForbidden;
- break;
- case SC_NOT_FOUND:
- textForGit = HttpServerText.get().repositoryNotFound;
- break;
- case SC_INTERNAL_SERVER_ERROR:
- textForGit = HttpServerText.get().internalServerError;
- break;
- default:
- textForGit = "HTTP " + httpStatus;
- break;
- }
- }
-
- ByteArrayOutputStream buf = new ByteArrayOutputStream(128);
- PacketLineOut pck = new PacketLineOut(buf);
-
- if (isInfoRefs(req)) {
- String svc = req.getParameter("service");
- pck.writeString("# service=" + svc + "\n");
- pck.end();
- pck.writeString("ERR " + textForGit);
- send(res, infoRefsResultType(svc), buf.toByteArray());
- } else if (isUploadPack(req)) {
- pck.writeString("ERR " + textForGit);
- send(res, UPLOAD_PACK_RESULT_TYPE, buf.toByteArray());
- } else if (isReceivePack(req)) {
- pck.writeString("ERR " + textForGit);
- send(res, RECEIVE_PACK_RESULT_TYPE, buf.toByteArray());
- } else {
- res.sendError(httpStatus);
- }
- }
-
- private static void send(HttpServletResponse res, String type, byte[] buf)
- throws IOException {
- res.setStatus(HttpServletResponse.SC_OK);
- res.setContentType(type);
- res.setContentLength(buf.length);
- ServletOutputStream os = res.getOutputStream();
- try {
- os.write(buf);
- } finally {
- os.close();
- }
- }
-
- /**
- * Get the response Content-Type a client expects for the request.
- * <p>
- * This method should only be invoked if
- * {@link #isGitClient(HttpServletRequest)} is true.
- *
- * @param req
- * current request.
- * @return the Content-Type the client expects.
- * @throws IllegalArgumentException
- * the request is not a Git client request. See
- * {@link #isGitClient(HttpServletRequest)}.
- */
- public static String getResponseContentType(HttpServletRequest req) {
- if (isInfoRefs(req))
- return infoRefsResultType(req.getParameter("service"));
- else if (isUploadPack(req))
- return UPLOAD_PACK_RESULT_TYPE;
- else if (isReceivePack(req))
- return RECEIVE_PACK_RESULT_TYPE;
- else
- throw new IllegalArgumentException();
- }
-
- static String infoRefsResultType(String svc) {
- return "application/x-" + svc + "-advertisement";
- }
-
- /**
- * Strip the Git service suffix from a request path.
- *
- * Generally the suffix is stripped by the {@code SuffixPipeline} handling
- * the request, so this method is rarely needed.
- *
- * @param path
- * the path of the request.
- * @return the path up to the last path component before the service suffix;
- * the path as-is if it contains no service suffix.
- */
- public static String stripServiceSuffix(String path) {
- for (String suffix : SERVICE_SUFFIXES) {
- if (path.endsWith(suffix))
- return path.substring(0, path.length() - suffix.length());
- }
- return path;
- }
-
- /**
- * Check if the HTTP request was for the /info/refs?service= Git handler.
- *
- * @param req
- * current request.
- * @return true if the request is for the /info/refs service.
- */
- public static boolean isInfoRefs(HttpServletRequest req) {
- return req.getRequestURI().endsWith(INFO_REFS_PATH)
- && VALID_SERVICES.contains(req.getParameter("service"));
- }
-
- /**
- * Check if the HTTP request path ends with the /git-upload-pack handler.
- *
- * @param pathOrUri
- * path or URI of the request.
- * @return true if the request is for the /git-upload-pack handler.
- */
- public static boolean isUploadPack(String pathOrUri) {
- return pathOrUri != null && pathOrUri.endsWith(UPLOAD_PACK_PATH);
- }
-
- /**
- * Check if the HTTP request was for the /git-upload-pack Git handler.
- *
- * @param req
- * current request.
- * @return true if the request is for the /git-upload-pack handler.
- */
- public static boolean isUploadPack(HttpServletRequest req) {
- return isUploadPack(req.getRequestURI())
- && UPLOAD_PACK_REQUEST_TYPE.equals(req.getContentType());
- }
-
- /**
- * Check if the HTTP request was for the /git-receive-pack Git handler.
- *
- * @param req
- * current request.
- * @return true if the request is for the /git-receive-pack handler.
- */
- public static boolean isReceivePack(HttpServletRequest req) {
- String uri = req.getRequestURI();
- return uri != null && uri.endsWith(RECEIVE_PACK_PATH)
- && RECEIVE_PACK_REQUEST_TYPE.equals(req.getContentType());
- }
-
- private GitSmartHttpTools() {
- }
- }
|