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Added image data URL handling to the excel cell content handler (#1237) #1239

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merged 1 commit into from
Mar 24, 2023
Merged

Added image data URL handling to the excel cell content handler (#1237) #1239

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47 changes: 30 additions & 17 deletions ...rt.emitters.excel/src/uk/co/spudsoft/birt/emitters/excel/handlers/CellContentHandler.java
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Original file line number Diff line number Diff line change
Expand Up @@ -2,13 +2,13 @@
* Copyright (c) 2011, 2012, 2013 James Talbut.
* jim-emitters@spudsoft.co.uk
*
*
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* https://www.eclipse.org/legal/epl-2.0/.
*
*
* SPDX-License-Identifier: EPL-2.0
*
*
* Contributors:
* James Talbut - Initial implementation.
************************************************************************************/
Expand All @@ -17,14 +17,14 @@

import java.io.IOException;
import java.math.BigDecimal;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;

import org.apache.commons.codec.binary.Base64;
import org.apache.poi.common.usermodel.HyperlinkType;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
Expand Down Expand Up @@ -116,6 +116,10 @@ public class CellContentHandler extends AbstractHandler {
*/
protected String hyperlinkBookmark;

private static String DATA_PROTOCOL = "data:";

private static String DATA_PROTOCOL_BASE = ";base64,";

public CellContentHandler(IContentEmitter emitter, Logger log, IHandler parent, ICellContent cell) {
super(log, parent, cell);
contentVisitor = new ContentEmitterVisitor(emitter);
Expand Down Expand Up @@ -495,20 +499,29 @@ public void recordImage(HandlerState state, Coordinate location, IImageContent i
Workbook wb = state.getWb();
String mimeType = image.getMIMEType();
if ((data == null) && (image.getURI() != null)) {
try {
URL imageUrl = new URL(image.getURI());
URLConnection conn = imageUrl.openConnection();
conn.connect();
mimeType = conn.getContentType();
int imageType = smu.poiImageTypeFromMimeType(mimeType, null);
if (imageType == 0) {
log.debug("Unrecognised/unhandled image MIME type: " + mimeType);
} else {
data = smu.downloadImage(conn);
String stringURI = image.getURI().toString().toLowerCase();
if (stringURI.startsWith(DATA_PROTOCOL) && stringURI.contains(DATA_PROTOCOL_BASE)) {
String base64[] = image.getURI().toString().split(DATA_PROTOCOL_BASE);
if (base64.length >= 2) {
data = Base64.decodeBase64(base64[1]);
}
} else {
try {
URL imageUrl = new URL(image.getURI());
URLConnection conn = imageUrl.openConnection();
conn.connect();
mimeType = conn.getContentType();
int imageType = smu.poiImageTypeFromMimeType(mimeType, null);
if (imageType == 0) {
log.debug("Unrecognised/unhandled image MIME type: " + mimeType);
} else {
data = smu.downloadImage(conn);
image.setData(data);
}
} catch (IOException ex) {
log.debug(ex.getClass(), ": ", ex.getMessage());
ex.printStackTrace();
}
} catch (IOException ex) {
log.debug(ex.getClass(), ": ", ex.getMessage());
ex.printStackTrace();
}
}
if (data != null) {
Expand Down