Java tutorial
/* * Copyright 2012 JBoss Inc * * 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 org.overlord.sramp.ui.server.servlets; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.inject.Inject; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileItemFactory; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.io.FileUtils; import org.apache.commons.io.FilenameUtils; import org.apache.commons.io.IOUtils; import org.oasis_open.docs.s_ramp.ns.s_ramp_v1.BaseArtifactType; import org.overlord.sramp.atom.archive.SrampArchive; import org.overlord.sramp.atom.archive.expand.DefaultMetaDataFactory; import org.overlord.sramp.atom.archive.expand.ZipToSrampArchive; import org.overlord.sramp.atom.archive.expand.registry.ZipToSrampArchiveRegistry; import org.overlord.sramp.atom.err.SrampAtomException; import org.overlord.sramp.common.ArtifactType; import org.overlord.sramp.ui.server.api.SrampApiClientAccessor; import org.overlord.sramp.ui.server.i18n.Messages; import org.overlord.sramp.ui.server.services.ArtifactTypeGuessingService; import org.overlord.sramp.ui.server.util.ExceptionUtils; /** * A standard servlet that artifact content is POSTed to in order to add new artifacts * to the s-ramp repository. * * @author eric.wittmann@redhat.com */ public class ArtifactUploadServlet extends AbstractUploadServlet { private static final long serialVersionUID = ArtifactUploadServlet.class.hashCode(); @Inject private SrampApiClientAccessor clientAccessor; @Inject private ArtifactTypeGuessingService artifactTypeGuesser; /** * Constructor. */ public ArtifactUploadServlet() { } /** * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) */ @SuppressWarnings("unchecked") @Override protected void doPost(HttpServletRequest req, HttpServletResponse response) throws ServletException, IOException { // Extract the relevant content from the POST'd form if (ServletFileUpload.isMultipartContent(req)) { Map<String, String> responseMap; FileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); // Parse the request String artifactType = null; String fileName = null; InputStream artifactContent = null; try { List<FileItem> items = upload.parseRequest(req); for (FileItem item : items) { if (item.isFormField()) { if (item.getFieldName().equals("artifactType")) { //$NON-NLS-1$ artifactType = item.getString(); } } else { fileName = item.getName(); if (fileName != null) fileName = FilenameUtils.getName(fileName); artifactContent = item.getInputStream(); } } // Now that the content has been extracted, process it (upload the artifact to the s-ramp repo). responseMap = uploadArtifact(artifactType, fileName, artifactContent); } catch (SrampAtomException e) { responseMap = new HashMap<String, String>(); responseMap.put("exception", "true"); //$NON-NLS-1$ //$NON-NLS-2$ responseMap.put("exception-message", e.getMessage()); //$NON-NLS-1$ responseMap.put("exception-stack", ExceptionUtils.getRootStackTrace(e)); //$NON-NLS-1$ } catch (Throwable e) { responseMap = new HashMap<String, String>(); responseMap.put("exception", "true"); //$NON-NLS-1$ //$NON-NLS-2$ responseMap.put("exception-message", e.getMessage()); //$NON-NLS-1$ responseMap.put("exception-stack", ExceptionUtils.getRootStackTrace(e)); //$NON-NLS-1$ } finally { IOUtils.closeQuietly(artifactContent); } writeToResponse(responseMap, response); } else { response.sendError(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE, Messages.i18n.format("UploadServlet.ContentTypeNotSupported")); //$NON-NLS-1$ } } /** * Upload the artifact to the S-RAMP repository. * @param artifactType the type of s-ramp artifact * @param fileName the file name of the artifact being uploaded * @param artifactContent the content of the artifact * @throws Exception */ private Map<String, String> uploadArtifact(String artifactType, String fileName, InputStream artifactContent) throws Exception { File tempFile = stashResourceContent(artifactContent); Map<String, String> responseParams = new HashMap<String, String>(); if (artifactType == null || artifactType.trim().length() == 0) { artifactType = artifactTypeGuesser.guess(fileName); } try { if ("SrampArchive".equals(artifactType)) { //$NON-NLS-1$ uploadPackage(tempFile, responseParams); } else { uploadSingleArtifact(artifactType, fileName, tempFile, responseParams); } } finally { FileUtils.deleteQuietly(tempFile); } return responseParams; } /** * Uploads an S-RAMP package to the repository. * @param tempFile * @param responseParams */ private void uploadPackage(File tempFile, Map<String, String> responseParams) throws Exception { SrampArchive archive = null; try { archive = new SrampArchive(tempFile); Map<String, ?> batch = clientAccessor.getClient().uploadBatch(archive); int numSuccess = 0; int numFailed = 0; for (String key : batch.keySet()) { Object object = batch.get(key); if (object instanceof BaseArtifactType) { numSuccess++; } else { numFailed++; } } // TODO turn these things into constants responseParams.put("batch", "true"); //$NON-NLS-1$ //$NON-NLS-2$ responseParams.put("batchTotal", String.valueOf(numSuccess + numFailed)); //$NON-NLS-1$ responseParams.put("batchNumSuccess", String.valueOf(numSuccess)); //$NON-NLS-1$ responseParams.put("batchNumFailed", String.valueOf(numFailed)); //$NON-NLS-1$ } finally { SrampArchive.closeQuietly(archive); } } /** * Uploads a single artifact to the S-RAMP repository. * @param artifactType * @param fileName * @param client * @param tempFile * @param responseParams * @throws Exception */ private void uploadSingleArtifact(String artifactType, String fileName, File tempFile, Map<String, String> responseParams) throws Exception { ArtifactType at = ArtifactType.valueOf(artifactType); String uuid = null; // First, upload the artifact, no matter what kind InputStream contentStream = null; try { contentStream = FileUtils.openInputStream(tempFile); BaseArtifactType artifact = clientAccessor.getClient().uploadArtifact(at, contentStream, fileName); responseParams.put("model", at.getArtifactType().getModel()); //$NON-NLS-1$ responseParams.put("type", at.getArtifactType().getType()); //$NON-NLS-1$ responseParams.put("uuid", artifact.getUuid()); //$NON-NLS-1$ uuid = artifact.getUuid(); } finally { IOUtils.closeQuietly(contentStream); } // Check if this is an expandable file type. If it is, then expand it! ZipToSrampArchive expander = null; SrampArchive archive = null; try { expander = ZipToSrampArchiveRegistry.createExpander(at, tempFile); if (expander != null) { expander.setContextParam(DefaultMetaDataFactory.PARENT_UUID, uuid); archive = expander.createSrampArchive(); clientAccessor.getClient().uploadBatch(archive); } } finally { SrampArchive.closeQuietly(archive); ZipToSrampArchive.closeQuietly(expander); } } }