added method to upload a resource given a file

git-svn-id: https://svn.d4science.research-infrastructures.eu/gcube/trunk/data-catalogue/ckan-util-library@134577 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/datacatalogue/ckanutillibrary/DataCatalogue.java

@@ -1,5 +1,6 @@
 package org.gcube.datacatalogue.ckanutillibrary;
 
+import java.io.File;
 import java.util.List;
 import java.util.Map;
 
@@ -351,4 +352,15 @@ public interface DataCatalogue {
 	 * @return a list of groups
 	 */
 	List<CkanGroup> getGroups();
+	
+	/**
+	 * Upload a file to ckan and attach it as resource.
+	 * @param file
+	 * @param packageId
+	 * @param authorizationToken
+	 * @param fileName
+	 * @param description
+	 * @return true on success, false otherwise
+	 */
+	boolean uploadResourceFile(File file, String packageId, String authorizationToken, String fileName, String description);
 }

src/main/java/org/gcube/datacatalogue/ckanutillibrary/DataCatalogueImpl.java

@@ -4,7 +4,9 @@ import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
 
 import java.io.BufferedReader;
+import java.io.File;
 import java.io.InputStreamReader;
+import java.nio.charset.Charset;
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.PreparedStatement;
@@ -38,11 +40,14 @@ import org.slf4j.LoggerFactory;
 import eu.trentorise.opendata.jackan.CheckedCkanClient;
 import eu.trentorise.opendata.jackan.CkanClient;
 import eu.trentorise.opendata.jackan.exceptions.JackanException;
+import eu.trentorise.opendata.jackan.internal.org.apache.http.HttpEntity;
 import eu.trentorise.opendata.jackan.internal.org.apache.http.HttpResponse;
 import eu.trentorise.opendata.jackan.internal.org.apache.http.HttpStatus;
 import eu.trentorise.opendata.jackan.internal.org.apache.http.client.methods.HttpGet;
 import eu.trentorise.opendata.jackan.internal.org.apache.http.client.methods.HttpPost;
+import eu.trentorise.opendata.jackan.internal.org.apache.http.entity.ContentType;
 import eu.trentorise.opendata.jackan.internal.org.apache.http.entity.StringEntity;
+import eu.trentorise.opendata.jackan.internal.org.apache.http.entity.mime.MultipartEntityBuilder;
 import eu.trentorise.opendata.jackan.internal.org.apache.http.impl.client.CloseableHttpClient;
 import eu.trentorise.opendata.jackan.internal.org.apache.http.impl.client.HttpClientBuilder;
 import eu.trentorise.opendata.jackan.model.CkanDataset;
@@ -1669,4 +1674,46 @@ public class DataCatalogueImpl implements DataCatalogue{
 		}
 
 	}
+
+	@Override
+	public boolean uploadResourceFile(File file, String packageId,
+			String token, String name, String description) {
+		
+		// checks
+		checkNotNull(file);
+		checkNotNull(packageId);
+		checkNotNull(token);
+		checkNotNull(name);
+
+		try (CloseableHttpClient httpClient = HttpClientBuilder.create().build()) {
+			String apiRequestUrl = CKAN_CATALOGUE_URL + "/api/3/action/resource_create";
+			HttpPost httpPostRequest = new HttpPost(apiRequestUrl);
+			httpPostRequest.setHeader("Authorization", token);
+			HttpEntity mpEntity = 
+					MultipartEntityBuilder.create()
+					.addTextBody("package_id", packageId)
+					.addTextBody("url", "upload")
+					.addTextBody("description", description == null ? "" : description)
+					.addTextBody("name", name)
+					.addBinaryBody("upload", file, 
+							ContentType.create(
+									"application/octet-stream",
+									Charset.forName("UTF-8")), 
+									name)
+							.build();
+
+			httpPostRequest.setEntity(mpEntity);
+			HttpResponse response = httpClient.execute(httpPostRequest);
+
+			if (response.getStatusLine().getStatusCode() < 200 || response.getStatusLine().getStatusCode() >= 300) {
+				throw new RuntimeException("failed to add the file to CKAN storage. response status line from "
+						+ apiRequestUrl + " was: " + response.getStatusLine());
+			}
+		} catch (Exception e) {
+			logger.error("Error while uploading file");
+			return false;
+		}
+
+		return true;
+	}
 }