package mircoders.servlet;
import java.io.InputStream;
-import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
+import java.util.Locale;
import java.util.Map;
import java.util.Vector;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
-import javax.servlet.http.HttpSession;
import mir.config.MirPropertiesConfiguration;
import mir.entity.Entity;
-import mir.entity.EntityList;
+import mir.entity.adapter.EntityAdapter;
+import mir.entity.adapter.EntityAdapterModel;
+import mir.entity.adapter.EntityIteratorAdapter;
import mir.log.LoggerWrapper;
-import mir.media.MediaHelper;
-import mir.media.MirMedia;
+import mircoders.media.MediaHelper;
+import mir.media.MediaHandler;
import mir.servlet.ServletModule;
import mir.servlet.ServletModuleExc;
import mir.servlet.ServletModuleFailure;
import mir.servlet.ServletModuleUserExc;
import mir.session.UploadedFile;
+import mir.util.CachingRewindableIterator;
import mir.util.ExceptionFunctions;
import mir.util.HTTPParsedRequest;
+import mir.util.HTTPRequestParser;
+import mir.util.JDBCStringRoutines;
+import mir.util.SQLQueryBuilder;
+import mir.util.URLBuilder;
import mircoders.entity.EntityComment;
import mircoders.entity.EntityContent;
import mircoders.entity.EntityUploadedMedia;
-import mircoders.entity.EntityUsers;
+import mircoders.global.MirGlobal;
import mircoders.media.MediaUploadProcessor;
-import mircoders.module.*;
+import mircoders.module.ModuleMediaType;
import mircoders.storage.DatabaseComment;
import mircoders.storage.DatabaseContent;
-import mircoders.storage.DatabaseMediafolder;
import org.apache.commons.fileupload.FileItem;
-import freemarker.template.SimpleHash;
-import freemarker.template.SimpleList;
-
-/*
- * ServletModuleBilder -
- * liefert HTML fuer Bilder
+/**
*
- * @version $Id: ServletModuleUploadedMedia.java,v 1.28.2.1 2003/06/19 02:24:13 zapata Exp $
- * @author RK, the mir-coders group
+ * <p>Title: </p>
+ * <p>Description: </p>
+ * <p>Copyright: Copyright (c) 2003</p>
+ * <p>Company: </p>
+ * @author the mir coders
+ * @version 1.0
*/
-public abstract class ServletModuleUploadedMedia
- extends mir.servlet.ServletModule {
-
- //private static DatabaseRights dbRights;
+public abstract class ServletModuleUploadedMedia extends ServletModule {
+ protected String moduleName = "UploadedMedia";
public static ServletModule getInstance() {
return null;
public ServletModuleUploadedMedia() {
super();
+
+ definition = "uploadedMedia";
logger = new LoggerWrapper("ServletModule.UploadedMedia");
+ try {
+ model = MirGlobal.localizer().dataModel().adapterModel();
+ }
+ catch (Throwable t) {
+ throw new ServletModuleFailure(t);
+ }
}
public void insert(HttpServletRequest aRequest, HttpServletResponse aResponse)
i=mediaList.iterator();
while (i.hasNext()) {
- entContent.attach(((EntityUploadedMedia) i.next()).getId());
+ String id = ((EntityUploadedMedia) i.next()).getId();
+
+ entContent.attach(id);
+ logAdminUsage(aRequest, id, "object attached to article " + articleid);
}
- ((ServletModuleContent) ServletModuleContent.getInstance())._showObject(articleid, aRequest, aResponse);
+ ((ServletModuleContent) ServletModuleContent.getInstance()).editObject(aRequest, aResponse, articleid);
+
return;
}
i=mediaList.iterator();
while (i.hasNext()) {
- comment.attach( ( (EntityUploadedMedia) i.next()).getId());
+ String id = ((EntityUploadedMedia) i.next()).getId();
+
+ comment.attach(id);
+
+ logAdminUsage(aRequest, id, "object attached to comment " + commentid);
}
- ((ServletModuleComment) ServletModuleComment.getInstance()).showComment(commentid, aRequest, aResponse);
+ ((ServletModuleComment) ServletModuleComment.getInstance()).editObject(aRequest, aResponse, commentid);
return;
}
- SimpleHash mergeData = new SimpleHash();
- SimpleHash popups = new SimpleHash();
- mergeData.put("contentlist", mir.generator.FreemarkerGenerator.makeAdapter(mediaList));
-
- mergeData.put("count", Integer.toString(mediaList.size()));
- mergeData.put("from", "1");
- mergeData.put("to", Integer.toString(mediaList.size()));
+ logAdminUsage(aRequest, "", mediaList.size() + " objects added");
- //fetch the popups
- popups.put("mediafolderPopupData", DatabaseMediafolder.getInstance().getPopupData());
- // raus damit
- deliver(aRequest, aResponse, mergeData, popups, templateListString);
+ returnUploadedMediaList(aRequest, aResponse, mediaList, 1, mediaList.size(), mediaList.size(), "", null, null);
}
catch (Throwable t) {
Throwable cause = ExceptionFunctions.traceCauseException(t);
mediaValues.put(field, value);
}
- mediaValues.put("to_publisher", ServletHelper.getUser(aRequest));
+ mediaValues.put("to_publisher", ServletHelper.getUser(aRequest).getId());
mediaValues.put("is_produced", "0");
if (!mediaValues.containsKey("is_published"))
mediaValues.put("is_published", "0");
String id = mainModule.set(mediaValues);
logger.debug("update: media ID = " + id);
- _edit(id, aRequest, aResponse);
+ logAdminUsage(aRequest, id, "object modified");
+
+ editUploadedMediaObject(id, aRequest, aResponse);
}
catch (Throwable e) {
throw new ServletModuleFailure("upload -- exception " + e.toString(), e);
}
+ public void returnUploadedMediaList(HttpServletRequest aRequest, HttpServletResponse aResponse,
+ Object aList, int aFrom, int aTo, int aCount,
+ String aThisUrl, String aNextUrl, String aPreviousUrl) throws ServletModuleExc {
- public void list(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc {
- // Parameter auswerten
- SimpleHash mergeData = new SimpleHash();
- SimpleHash popups = new SimpleHash();
-
- String query_text = aRequest.getParameter("query_text");
- mergeData.put("query_text", query_text);
- if (query_text != null) mergeData.put("query_text_encoded", URLEncoder.encode(query_text));
- String query_field = aRequest.getParameter("query_field");
- mergeData.put("query_field", query_field);
- String query_is_published = aRequest.getParameter("query_is_published");
- mergeData.put("query_is_published", query_is_published);
- String query_media_folder = aRequest.getParameter("query_media_folder");
- mergeData.put("query_media_folder", query_media_folder);
- String offset = aRequest.getParameter("offset");
- if (offset == null || offset.equals("")) offset = "0";
- mergeData.put("offset", offset);
-
- String order = aRequest.getParameter("order");
- if (order == null || order.equals("")) order = "webdb_lastchange desc";
-
- // if in connection mode to content
- mergeData.put("articleid", aRequest.getParameter("articleid"));
- mergeData.put("commentid", aRequest.getParameter("commentid"));
-
-
- // sql basteln
- String whereClause = "";
- boolean isFirst = true;
- if (query_text != null && !query_text.equalsIgnoreCase("")) {
- whereClause += "lower(" + query_field + ") like lower('%" + query_text + "%')";
- isFirst = false;
- }
- if (query_is_published != null && !query_is_published.equals("")) {
- if (isFirst == false) whereClause += " and ";
- whereClause += "is_published='" + query_is_published + "'";
- isFirst = false;
+ try {
+ HTTPRequestParser requestParser = new HTTPRequestParser(aRequest);
+ Map responseData = ServletHelper.makeGenerationData(aRequest, aResponse, new Locale[] {getLocale(aRequest), getFallbackLocale(aRequest)});
+
+ responseData.put("searchfield", requestParser.getParameterWithDefault("searchfield", ""));
+ responseData.put("searchtext", requestParser.getParameterWithDefault("searchtext", ""));
+ responseData.put("searchispublished", requestParser.getParameterWithDefault("searchispublished", ""));
+ responseData.put("searchmediafolder", requestParser.getParameterWithDefault("searchmediafolder", ""));
+ responseData.put("articleid", requestParser.getParameter("articleid"));
+ responseData.put("commentid", requestParser.getParameter("commentid"));
+
+ responseData.put("thisurl", aThisUrl);
+ responseData.put("nexturl", aNextUrl);
+ responseData.put("prevurl", aPreviousUrl);
+
+ responseData.put("from", Integer.toString(aFrom));
+ responseData.put("count", Integer.toString(aCount));
+ responseData.put("to", Integer.toString(aTo));
+
+ responseData.put("medialist", aList);
+
+ addExtraData(responseData);
+ ServletHelper.generateResponse(aResponse.getWriter(), responseData, listGenerator);
}
- if (query_media_folder != null && !query_media_folder.equals("")) {
- if (isFirst == false) whereClause += " and ";
- whereClause += "to_media_folder='" + query_media_folder + "'";
+ catch (Throwable t) {
+ throw new ServletModuleFailure(t);
}
- //theLog.printDebugInfo("sql-whereclause: " + whereClause + " order: " + order + " offset: " + offset);
+ }
+
+ public void returnUploadedMediaList(HttpServletRequest aRequest, HttpServletResponse aResponse,
+ String aWhereClause, String anOrderByClause, int anOffset) throws ServletModuleExc {
+
+ HTTPRequestParser requestParser = new HTTPRequestParser(aRequest);
+ URLBuilder urlBuilder = new URLBuilder();
+ EntityAdapterModel model;
+ String nextPageUrl = null;
+ String previousPageUrl = null;
+ String thisUrl = null;
+
+ int count;
- // fetch and deliver
try {
- if (query_text != null || query_is_published != null || query_media_folder != null) {
- EntityList theList = mainModule.getByWhereClause(whereClause, order, (new Integer(offset)).intValue(), 10);
- if (theList != null) {
- mergeData.put("contentlist", theList);
- if (theList.getOrder() != null) {
- mergeData.put("order", theList.getOrder());
- mergeData.put("order_encoded", URLEncoder.encode(theList.getOrder()));
- }
- mergeData.put("count", (new Integer(theList.getCount())).toString());
- mergeData.put("from", (new Integer(theList.getFrom())).toString());
- mergeData.put("to", (new Integer(theList.getTo())).toString());
- if (theList.hasNextBatch())
- mergeData.put("next", (new Integer(theList.getNextBatch())).toString());
- if (theList.hasPrevBatch())
- mergeData.put("prev", (new Integer(theList.getPrevBatch())).toString());
- }
+ model = MirGlobal.localizer().dataModel().adapterModel();
+
+ Object mediaList =
+ new CachingRewindableIterator(
+ new EntityIteratorAdapter(aWhereClause, anOrderByClause, nrEntitiesPerListPage,
+ model, definition, nrEntitiesPerListPage, anOffset)
+ );
+
+ count = mainModule.getSize(aWhereClause);
+
+ urlBuilder.setValue("module", moduleName);
+ urlBuilder.setValue("do", "list");
+ urlBuilder.setValue("where", aWhereClause);
+ urlBuilder.setValue("order", anOrderByClause);
+
+ urlBuilder.setValue("articleid", requestParser.getParameter("articleid"));
+ urlBuilder.setValue("commentid", requestParser.getParameter("commentid"));
+ urlBuilder.setValue("searchfield", requestParser.getParameter("searchfield"));
+ urlBuilder.setValue("searchtext", requestParser.getParameter("searchtext"));
+ urlBuilder.setValue("searchispublished", requestParser.getParameter("searchispublished"));
+ urlBuilder.setValue("searchmediafolder", requestParser.getParameter("searchmediafolder"));
+ urlBuilder.setValue("where", aWhereClause);
+ urlBuilder.setValue("order", anOrderByClause);
+
+ urlBuilder.setValue("offset", anOffset);
+ thisUrl = urlBuilder.getQuery();
+
+ if (count >= anOffset + nrEntitiesPerListPage) {
+ urlBuilder.setValue("offset", anOffset + nrEntitiesPerListPage);
+ nextPageUrl = urlBuilder.getQuery();
+ }
+
+ if (anOffset > 0) {
+ urlBuilder.setValue("offset", Math.max(anOffset - nrEntitiesPerListPage, 0));
+ previousPageUrl = urlBuilder.getQuery();
}
- popups.put("mediafolderPopupData", DatabaseMediafolder.getInstance().getPopupData());
- deliver(aRequest, aResponse, mergeData, popups, templateListString);
+ returnUploadedMediaList(aRequest, aResponse, mediaList,
+ anOffset+1, anOffset+nrEntitiesPerListPage, count, thisUrl,
+ nextPageUrl, previousPageUrl);
}
catch (Throwable e) {
throw new ServletModuleFailure(e);
}
}
+ public void search(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc {
+ HTTPRequestParser requestParser = new HTTPRequestParser(aRequest);
- public void add(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc {
- try {
- SimpleHash mergeData = new SimpleHash();
- SimpleHash popups = new SimpleHash();
- String maxMedia = MirPropertiesConfiguration.instance().getString("ServletModule.OpenIndy.MaxMediaUploadItems");
- String numOfMedia = aRequest.getParameter("medianum");
+ SQLQueryBuilder queryBuilder = new SQLQueryBuilder();
- mergeData.put("new", "1");
- mergeData.put("articleid", aRequest.getParameter("articleid"));
- mergeData.put("commentid", aRequest.getParameter("commentid"));
+ String queryField = "";
+ String searchField = requestParser.getParameter("searchfield");
+ String searchText = requestParser.getParameter("searchtext");
+ String searchIsPublished = requestParser.getParameter("searchispublished");
+ String searchMediaFolder = requestParser.getParameter("searchmediafolder");
- popups.put("mediafolderPopupData", DatabaseMediafolder.getInstance().getPopupData());
+ queryBuilder.appendDescendingOrder("webdb_create");
- if (numOfMedia==null || numOfMedia.equals("")) {
- numOfMedia="1";
+ if (searchIsPublished!=null)
+ if (searchIsPublished.equals("0")) {
+ queryBuilder.appendAndCondition("is_published='f'");
}
- else if(Integer.parseInt(numOfMedia) > Integer.parseInt(maxMedia)) {
- numOfMedia = maxMedia;
+ else if (searchIsPublished.equals("1")) {
+ queryBuilder.appendAndCondition("is_published='t'");
}
- int mediaNum = Integer.parseInt(numOfMedia);
- SimpleList mediaFields = new SimpleList();
- for(int i =0; i<mediaNum;i++){
- Integer mNum = new Integer(i+1);
- mediaFields.add(mNum.toString());
+ if (searchField!=null && searchText!=null && searchText.length()>0) {
+ queryBuilder.appendAndCondition(
+ "lower(" + searchField + ") like " +
+ "'%" + JDBCStringRoutines.escapeStringLiteral(searchText.toLowerCase()) + "%'");
+ }
+
+ if (searchMediaFolder!=null && searchMediaFolder.length()>0) {
+ queryBuilder.appendAndCondition("to_media_folder="+Integer.parseInt(searchMediaFolder));
+ }
+
+ returnUploadedMediaList(aRequest, aResponse,
+ queryBuilder.getWhereClause(), queryBuilder.getOrderByClause(), requestParser.getIntegerWithDefault("offset", 0));
+ }
+
+ public void list(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc {
+ HTTPRequestParser requestParser = new HTTPRequestParser(aRequest);
+
+ returnUploadedMediaList(aRequest, aResponse,
+ requestParser.getParameterWithDefault("where", ""),
+ requestParser.getParameterWithDefault("order", "webdb_create desc"),
+ requestParser.getIntegerWithDefault("offset", 0));
+ }
+
+
+ public void add(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc {
+ try {
+ HTTPRequestParser requestParser = new HTTPRequestParser(aRequest);
+ Map responseData = ServletHelper.makeGenerationData(aRequest, aResponse, new Locale[] {getLocale(aRequest), getFallbackLocale(aRequest)});
+
+ int nrMedia = requestParser.getIntegerWithDefault("nrmedia", 1);
+ int maxNrMedia=configuration.getInt("ServletModule.OpenIndy.MaxMediaUploadItems", 20);
+
+ List fields = mainModule.getStorageObject().getFields();
+ Map media = new HashMap();
+ Iterator i = fields.iterator();
+ while (i.hasNext()) {
+ media.put(i.next(), null);
}
- mergeData.put("medianum",numOfMedia);
- mergeData.put("mediafields",mediaFields);
- deliver(aRequest, aResponse, mergeData, popups, templateObjektString);
+ media.put("to_media_folder", new Integer(7));
+ responseData.put("uploadedmedia", media);
+
+ responseData.put("new", Boolean.TRUE);
+ responseData.put("articleid", requestParser.getParameter("articleid"));
+ responseData.put("commentid", requestParser.getParameter("commentid"));
+ responseData.put("returnurl", null);
+
+ if (nrMedia<=0)
+ nrMedia=1;
+ if (nrMedia>maxNrMedia)
+ nrMedia=maxNrMedia;
+
+ List mediaFields = new Vector();
+ for (int j=0; j<nrMedia; j++)
+ mediaFields.add(new Integer(j));
+
+ responseData.put("nrmedia", new Integer(nrMedia));
+ responseData.put("mediafields", mediaFields);
+
+ responseData.put("edittemplate", editGenerator);
+ responseData.put("module", moduleName);
+
+ addExtraData(responseData);
+
+ ServletHelper.generateResponse(aResponse.getWriter(), responseData, "uploadedmedia.template");
}
catch (Exception e) {
throw new ServletModuleFailure(e);
}
public void edit(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc {
- String idParam = aRequest.getParameter("id");
- _edit(idParam, aRequest, aResponse);
+ editUploadedMediaObject(aRequest.getParameter("id"), aRequest, aResponse);
}
- private void _edit(String idParam, HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc {
+ private void editUploadedMediaObject(String idParam, HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc {
if (idParam != null && !idParam.equals("")) {
try {
- SimpleHash popups = new SimpleHash();
- popups.put("mediafolderPopupData", DatabaseMediafolder.getInstance().getPopupData());
- deliver(aRequest, aResponse, mainModule.getById(idParam), popups,
- templateObjektString);
+ Map responseData = ServletHelper.makeGenerationData(aRequest, aResponse, new Locale[] {getLocale(aRequest), getFallbackLocale(aRequest)});
+ EntityAdapter object =
+ model.makeEntityAdapter(definition, mainModule.getById(idParam));
+ responseData.put("uploadedmedia", object);
+ responseData.put("new", Boolean.FALSE);
+ responseData.put("articleid", null);
+ responseData.put("commentid", null);
+ responseData.put("returnurl", null);
+ responseData.put("thisurl", null);
+
+ responseData.put("edittemplate", editGenerator);
+ responseData.put("module", moduleName);
+
+ addExtraData(responseData);
+
+ ServletHelper.generateResponse(aResponse.getWriter(), responseData, "uploadedmedia.template");
}
catch (Throwable e) {
throw new ServletModuleFailure(e);
}
}
else {
- throw new ServletModuleExc("ServletmoduleUploadedMedia :: _edit without id");
+ throw new ServletModuleExc("ServletmoduleUploadedMedia :: editUploadedMediaObject without id");
}
}
-
public void getMedia(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc {
String idParam = aRequest.getParameter("id");
+
if (idParam!=null && !idParam.equals("")) {
try {
- EntityUploadedMedia ent = (EntityUploadedMedia)mainModule.getById(idParam);
- Entity mediaType = ent.getMediaType();
- MirMedia mediaHandler;
+ EntityUploadedMedia entity = (EntityUploadedMedia)mainModule.getById(idParam);
+ Entity mediaType = entity.getMediaType();
+ MediaHandler mediaHandler;
ServletContext ctx = MirPropertiesConfiguration.getContext();
- String fName = ent.getId()+"."+mediaType.getValue("name");
+ String fName = entity.getId()+"."+mediaType.getFieldValue("name");
mediaHandler = MediaHelper.getHandler(mediaType);
- InputStream in = mediaHandler.getMedia(ent, mediaType);
+ InputStream in = mediaHandler.getMedia(entity, mediaType);
aResponse.setContentType(ctx.getMimeType(fName));
//important that before calling this aResponse.getWriter was not called first
// no exception allowed
}
- public void getIcon(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc
+
+ /**
+ * @obsolete
+ *
+ * @param aRequest
+ * @param aResponse
+ * @throws ServletModuleExc
+ */
+ public void getIcon(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc {
+ getThumbnail(aRequest, aResponse);
+
+ }
+
+ /**
+ *
+ * @param aRequest
+ * @param aResponse
+ * @throws ServletModuleExc
+ */
+ public void getThumbnail(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc
{
String idParam = aRequest.getParameter("id");
if (idParam!=null && !idParam.equals("")) {
try {
EntityUploadedMedia ent = (EntityUploadedMedia) mainModule.getById(idParam);
Entity mediaType = ent.getMediaType();
- MirMedia mediaHandler;
+ MediaHandler mediaHandler;
mediaHandler = MediaHelper.getHandler(mediaType);
- InputStream in = mediaHandler.getIcon(ent);
+ InputStream in = mediaHandler.getThumbnail(ent);
if (in==null)
throw new ServletModuleExc("no icon available");
- aResponse.setContentType(mediaHandler.getIconMimeType(ent, mediaType));
+ aResponse.setContentType(mediaHandler.getThumbnailMimeType(ent, mediaType));
//important that before calling this aResponse.getWriter was not called first
ServletOutputStream out = aResponse.getOutputStream();
}
catch (Throwable e) {
- throw new ServletModuleFailure(e);
+ logger.error("getIcon: " + e.toString());
}
}
else logger.error("getIcon: id not specified.");
// no exception allowed
}
-}
+ protected void addExtraData(Map aTarget) throws ServletModuleExc, ServletModuleFailure {
+ try {
+ aTarget.put("mediafolders",
+ new EntityIteratorAdapter("", "", 20, MirGlobal.localizer().dataModel().adapterModel(), "mediaFolder"));
+ }
+ catch (Throwable t) {
+ throw new ServletModuleFailure(t);
+ }
+ }
+ public void showarticles(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc
+ {
+ String idParam = aRequest.getParameter("id");
+ if (idParam!=null && !idParam.equals("")) {
+ try {
+ EntityUploadedMedia entity = (EntityUploadedMedia) mainModule.getById(idParam);
+ // TODO rewrite as relational sql
+ ServletModuleContent.getInstance().returnList(
+ aRequest,
+ aResponse,
+ "exists (select * from content_x_media where content_id=content.id and media_id=" + JDBCStringRoutines.escapeStringLiteral( idParam ) + ")", "", 0);
+ }
+ catch (Throwable t) {
+ throw new ServletModuleFailure(t);
+ }
+ }
+ else logger.error("showarticles: id not specified.");
+ }
+ public void showcomments(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc
+ {
+ String idParam = aRequest.getParameter("id");
+ if (idParam!=null && !idParam.equals("")) {
+ try {
+ EntityUploadedMedia entity = (EntityUploadedMedia) mainModule.getById(idParam);
+ // TODO rewrite as relational sql
+ ServletModuleComment.getInstance().returnList(
+ aRequest,
+ aResponse,
+ "exists (select * from comment_x_media where comment_id=comment.id and media_id=" + JDBCStringRoutines.escapeStringLiteral( idParam ) + ")", "", 0);
+ }
+ catch (Throwable t) {
+ throw new ServletModuleFailure(t);
+ }
+ }
+ else logger.error("showcomments: id not specified.");
+ }
+}
\ No newline at end of file
projects / mir.git / blobdiff