/*
* Copyright 1999-2101 Alibaba Group.
*
* 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 com.alibaba.simpleimage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
import javax.imageio.ImageIO;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import com.alibaba.simpleimage.io.ByteArrayOutputStream;
import com.alibaba.simpleimage.render.DrawTextParameter;
import com.alibaba.simpleimage.render.DrawTextRender;
import com.alibaba.simpleimage.render.ReadRender;
import com.alibaba.simpleimage.render.ScaleParameter;
import com.alibaba.simpleimage.render.ScaleRender;
import com.alibaba.simpleimage.render.WriteRender;
import com.alibaba.simpleimage.render.ScaleParameter.Algorithm;
import com.alibaba.simpleimage.util.ImageUtils;
/**
* 该类目前支持中文站业务处理流程。 可以根据需要， 添加不同的处理方案。
* 该类目前已经放到中文站图片银行维护，这里不再维护了
* @author wendell
*/
@Deprecated
public final class CompositeImageProcessor {
public static final int FILE_CONTENT_LOG_MAX_FILE_NUM = 50;
public static final String FILE_CONTENT_LOG_BASE_DIR_NAME = "ibankErrorLog4FileContent";
public static final long EXPIRED_PERIOD = 7 * 24 * 60 * 60 * 1000L;
private String errorDir = null;
static {
ImageIO.setUseCache(false);
}
public CompositeImageProcessor(String errorDir){
setErrorDir(errorDir);
}
public CompositeImageProcessor(){
super();
}
/**
* 根据输入的流的， 完成写水印， 缩放， 写输出流。
*
* @param is 输入图像流， 需要主动关闭
* @param dp 水印参数
* @param scaleParam 缩放参数
* @param wjp 写文件参数
* @return 输出图像流， 需要主动关闭. 如果中间处理出错， 抛出异常;
* @throws IOException
* @throws IOException
*/
public OutputStream process(InputStream inputStream, DrawTextParameter drawParam, int maxWidth, int maxHeight)
throws SimpleImageException {
ImageRender wr = null;
ByteArrayOutputStream output = null;
try {
inputStream = ImageUtils.createMemoryStream(inputStream);
output = new ByteArrayOutputStream();
ImageFormat outputFormat = ImageUtils.isGIF(inputStream) ? ImageFormat.GIF : ImageFormat.JPEG;
ScaleParameter scaleParam = new ScaleParameter(maxWidth, maxHeight, Algorithm.AUTO);
ImageRender rr = new ReadRender(inputStream, true);
ImageRender dtr = new DrawTextRender(rr, drawParam);
ImageRender sr = new ScaleRender(dtr, scaleParam);
wr = new WriteRender(sr, output, outputFormat);
wr.render();
} catch (Exception e) {
errorLog(inputStream);
IOUtils.closeQuietly(output);
if (e instanceof SimpleImageException) {
throw (SimpleImageException) e;
} else {
throw new SimpleImageException(e);
}
} finally {
try {
if (wr != null) {
wr.dispose();
}
} catch (SimpleImageException ignore) {
}
}
return output;
}
private void errorLog(InputStream is) {
if (StringUtils.isBlank(errorDir)) {
errorDir = System.getProperty("java.io.tmpdir") + File.separator + FILE_CONTENT_LOG_BASE_DIR_NAME;
}
if (StringUtils.isNotBlank(errorDir)) {
File errorPath = new File(errorDir);
if (!errorPath.exists()) {
errorPath.mkdirs();
}
if (!canWriteErrorDir(errorPath)) {
return;
}
// 错误文件夹定义存在， 及流支持重置(有些流不支持重置)
if (errorPath.exists() && is.markSupported()) {
OutputStream os = null;
try {
is.reset();
File temp = new File(errorPath, "errimg-" + UUID.randomUUID().toString().replace("-", "_") + ".jpg");
os = new FileOutputStream(temp);
// write error image stream to a temp file
byte buffer[] = new byte[1024];
int count = -1;
while ((count = is.read(buffer)) != -1) {
os.write(buffer, 0, count);
}
os.flush();
} catch (IOException igonre) {
} finally {
IOUtils.closeQuietly(os);
}
}
}
}// end errorLog
/**
* 检查错误图片存放目录是否超出限额，如果超出限额且不存在过期文件，则return false不允许写 否则return true，允许记录错误文件
*
* @param errorPath
* @return
*/
private boolean canWriteErrorDir(File errorPath) {
String[] files = errorPath.list();
if (files != null && files.length > FILE_CONTENT_LOG_MAX_FILE_NUM) {
long now = System.currentTimeMillis();
int delNum = 0;
for (String filename : files) {
File errImg = new File(errorPath, filename);
if (now - errImg.lastModified() > EXPIRED_PERIOD) {
errImg.delete();
delNum++;
}
}
if (files.length - delNum <= FILE_CONTENT_LOG_MAX_FILE_NUM) {
return true;
}
return false;
}
return true;
}
/**
* @return the errorDir
*/
public String getErrorDir() {
return errorDir;
}
/**
* @param errorDir the errorDir to set
*/
public void setErrorDir(String errorDir) {
this.errorDir = errorDir;
File errorPath = new File(errorDir);
if (!errorPath.exists()) {
errorPath.mkdirs();
}
}
}