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- /*
- * Copyright (C) 2015, Sasa Zivkov <sasa.zivkov@sap.com>
- * 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.lfs.server;
-
- import static java.nio.charset.StandardCharsets.UTF_8;
- import static org.apache.http.HttpStatus.SC_FORBIDDEN;
- import static org.apache.http.HttpStatus.SC_NOT_FOUND;
- import static org.apache.http.HttpStatus.SC_OK;
- import static org.apache.http.HttpStatus.SC_SERVICE_UNAVAILABLE;
- import static org.apache.http.HttpStatus.SC_UNPROCESSABLE_ENTITY;
-
- import java.io.BufferedReader;
- import java.io.BufferedWriter;
- import java.io.IOException;
- import java.io.InputStreamReader;
- import java.io.OutputStreamWriter;
- import java.io.PrintWriter;
- import java.io.Reader;
- import java.io.Writer;
- import java.util.List;
-
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
-
- import org.eclipse.jgit.lfs.errors.LfsException;
- import org.eclipse.jgit.lfs.errors.LfsRepositoryNotFound;
- import org.eclipse.jgit.lfs.errors.LfsRepositoryReadOnly;
- import org.eclipse.jgit.lfs.errors.LfsValidationError;
-
- import com.google.gson.FieldNamingPolicy;
- import com.google.gson.Gson;
- import com.google.gson.GsonBuilder;
-
- /**
- * LFS protocol handler implementing the LFS batch API [1]
- *
- * [1] https://github.com/github/git-lfs/blob/master/docs/api/v1/http-v1-batch.md
- *
- * @since 4.3
- */
- public abstract class LfsProtocolServlet extends HttpServlet {
-
- private static final long serialVersionUID = 1L;
-
- private static final String CONTENTTYPE_VND_GIT_LFS_JSON = "application/vnd.git-lfs+json"; //$NON-NLS-1$
-
- private Gson gson = createGson();
-
- /**
- * Get the large file repository for the given request and path.
- *
- * @param request
- * the request
- * @param path
- * the path
- *
- * @return the large file repository storing large files or null if the
- * request is not supported.
- * @throws LfsException
- * @since 4.5
- */
- protected abstract LargeFileRepository getLargeFileRepository(
- LfsRequest request, String path) throws LfsException;
-
- /**
- * LFS request.
- *
- * @since 4.5
- */
- protected static class LfsRequest {
- private String operation;
-
- private List<LfsObject> objects;
-
- /**
- * Get the LFS operation.
- *
- * @return the operation
- */
- public String getOperation() {
- return operation;
- }
-
- /**
- * Get the LFS objects.
- *
- * @return the objects
- */
- public List<LfsObject> getObjects() {
- return objects;
- }
- }
-
- @Override
- protected void doPost(HttpServletRequest req, HttpServletResponse res)
- throws ServletException, IOException {
- Writer w = new BufferedWriter(
- new OutputStreamWriter(res.getOutputStream(), UTF_8));
-
- Reader r = new BufferedReader(new InputStreamReader(req.getInputStream(), UTF_8));
- LfsRequest request = gson.fromJson(r, LfsRequest.class);
- String path = req.getPathInfo();
-
- LargeFileRepository repo = null;
- try {
- repo = getLargeFileRepository(request, path);
- } catch (LfsValidationError e) {
- sendError(res, SC_UNPROCESSABLE_ENTITY, e.getMessage());
- return;
- } catch (LfsRepositoryNotFound e) {
- sendError(res, SC_NOT_FOUND, e.getMessage());
- return;
- } catch (LfsRepositoryReadOnly e) {
- sendError(res, SC_FORBIDDEN, e.getMessage());
- return;
- } catch (LfsException e) {
- sendError(res, SC_SERVICE_UNAVAILABLE, e.getMessage());
- return;
- }
- if (repo == null) {
- res.setStatus(SC_SERVICE_UNAVAILABLE);
- return;
- }
-
- res.setStatus(SC_OK);
- res.setContentType(CONTENTTYPE_VND_GIT_LFS_JSON);
- TransferHandler handler = TransferHandler
- .forOperation(request.operation, repo, request.objects);
- gson.toJson(handler.process(), w);
- w.flush();
- }
-
- static class Error {
- String message;
-
- Error(String m) {
- this.message = m;
- }
- }
-
- private void sendError(HttpServletResponse rsp, int status, String message)
- throws IOException {
- rsp.setStatus(status);
- PrintWriter writer = rsp.getWriter();
- gson.toJson(new Error(message), writer);
- writer.flush();
- writer.close();
- rsp.flushBuffer();
- }
-
- private Gson createGson() {
- GsonBuilder gb = new GsonBuilder()
- .setFieldNamingPolicy(
- FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
- .setPrettyPrinting().disableHtmlEscaping();
- return gb.create();
- }
- }
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