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| package com.opensymphony.oscache.web.filter; |
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| import java.io.*; |
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| import java.util.Locale; |
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| import java.util.zip.GZIPInputStream; |
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| import javax.servlet.ServletResponse; |
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| import javax.servlet.http.HttpServletResponse; |
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| public class ResponseContent implements Serializable { |
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| private transient ByteArrayOutputStream bout = new ByteArrayOutputStream(1000); |
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| private Locale locale = null; |
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| private String contentEncoding = null; |
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| private String contentType = null; |
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| private byte[] content = null; |
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| private long expires = Long.MAX_VALUE; |
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| private long lastModified = -1; |
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| private long maxAge = -60; |
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| public String getContentType() {
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| return contentType;
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| } |
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| public void setContentType(String value) {
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| contentType = value;
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| } |
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| public long getLastModified() {
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| return lastModified;
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| } |
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| public void setLastModified(long value) {
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| lastModified = value;
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| } |
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| public String getContentEncoding() {
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| return contentEncoding;
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| } |
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| public void setContentEncoding(String contentEncoding) {
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| this.contentEncoding = contentEncoding;
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| } |
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| public void setLocale(Locale value) {
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| locale = value;
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| } |
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| public long getExpires() {
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| return expires;
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| } |
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| public void setExpires(long value) {
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| expires = value;
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| } |
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| public long getMaxAge() {
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| return maxAge;
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| } |
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| public void setMaxAge(long value) {
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| maxAge = value;
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| } |
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| public OutputStream getOutputStream() {
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| return bout;
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| } |
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| public int getSize() {
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| return (content != null) ? content.length : (-1);
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| } |
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| public void commit() {
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| if (bout != null) {
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| content = bout.toByteArray();
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| bout = null;
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| } |
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| } |
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| public void writeTo(ServletResponse response) throws IOException {
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| writeTo(response, false, false);
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| } |
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| public void writeTo(ServletResponse response, boolean fragment, boolean acceptsGZip) throws IOException {
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| if (contentType != null) {
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| response.setContentType(contentType);
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| } |
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| if (fragment) {
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| acceptsGZip = false;
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| } else { |
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| if (response instanceof HttpServletResponse) {
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| HttpServletResponse httpResponse = (HttpServletResponse) response;
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| if (lastModified != -1) {
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| httpResponse.setDateHeader(CacheFilter.HEADER_LAST_MODIFIED, lastModified);
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| } |
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| if (expires != Long.MAX_VALUE) {
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| httpResponse.setDateHeader(CacheFilter.HEADER_EXPIRES, expires);
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| } |
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| if (maxAge == CacheFilter.MAX_AGE_NO_INIT || maxAge == CacheFilter.MAX_AGE_TIME) {
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| } else if (maxAge > 0) {
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| long currentMaxAge = maxAge / 1000 - System.currentTimeMillis() / 1000;
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| if (currentMaxAge < 0) {
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| currentMaxAge = 0;
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| } |
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| httpResponse.addHeader(CacheFilter.HEADER_CACHE_CONTROL, "max-age=" + currentMaxAge);
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| } else { |
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| httpResponse.addHeader(CacheFilter.HEADER_CACHE_CONTROL, "max-age=" + (-maxAge));
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| } |
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| } |
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| } |
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| if (locale != null) {
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| response.setLocale(locale);
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| } |
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| OutputStream out = new BufferedOutputStream(response.getOutputStream());
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| if (isContentGZiped()) {
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| if (acceptsGZip) {
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| ((HttpServletResponse) response).addHeader(CacheFilter.HEADER_CONTENT_ENCODING, "gzip");
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| response.setContentLength(content.length);
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| out.write(content);
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| } else { |
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| ByteArrayInputStream bais = new ByteArrayInputStream(content);
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| GZIPInputStream zis = new GZIPInputStream(bais);
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| ByteArrayOutputStream baos = new ByteArrayOutputStream();
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| int numBytesRead = 0;
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| byte[] tempBytes = new byte[4196];
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| while ((numBytesRead = zis.read(tempBytes, 0, tempBytes.length)) != -1) {
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| baos.write(tempBytes, 0, numBytesRead);
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| } |
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| byte[] result = baos.toByteArray();
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| response.setContentLength(result.length);
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| out.write(result);
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| } |
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| } else { |
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| response.setContentLength(content.length);
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| out.write(content);
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| } |
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| out.flush();
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| } |
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| public boolean isContentGZiped() {
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| return "gzip".equals(contentEncoding);
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| } |
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| } |