001/* 002 * (C) Copyright 2018 Nuxeo (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Funsho David 018 */ 019 020package org.nuxeo.ecm.automation.core.util; 021 022import java.io.IOException; 023 024import javax.servlet.http.HttpServletResponse; 025 026import org.nuxeo.ecm.core.api.Blob; 027import org.nuxeo.ecm.core.api.NuxeoException; 028import org.nuxeo.ecm.core.blob.BlobInfo; 029import org.nuxeo.ecm.core.blob.BlobManager; 030import org.nuxeo.ecm.core.blob.BlobProvider; 031import org.nuxeo.runtime.api.Framework; 032 033import com.fasterxml.jackson.databind.node.ObjectNode; 034 035/** 036 * Blob decoder resolving a blob from a given blob provider and a blob key. 037 * <p> 038 * Format is: 039 * 040 * <pre> 041 * { 042 * "providerId": "PROVIDER_ID", <-- the blob provider id 043 * "key": "BLOB_KEY" <-- the blob key 044 * } 045 * </pre> 046 * 047 * @since 10.2 048 */ 049public class JSONManagedBlobDecoder implements JSONBlobDecoder { 050 051 @Override 052 public Blob getBlobFromJSON(ObjectNode jsonObject) { 053 054 if (!(jsonObject.has("providerId") && jsonObject.has("key"))) { 055 return null; 056 } 057 058 String providerId = jsonObject.get("providerId").textValue(); 059 BlobProvider blobProvider = Framework.getService(BlobManager.class).getBlobProvider(providerId); 060 if (blobProvider == null) { 061 return null; 062 } 063 064 if (!blobProvider.hasCreateFromKeyPermission()) { 065 throw new NuxeoException("The current user does not have the rights to fetch the blob", 066 HttpServletResponse.SC_UNAUTHORIZED); 067 } 068 069 try { 070 BlobInfo blobInfo = new BlobInfo(); 071 blobInfo.key = providerId + ":" + jsonObject.get("key").textValue(); 072 return blobProvider.readBlob(blobInfo); 073 } catch (IOException e) { 074 throw new NuxeoException(e); 075 } 076 } 077 078}