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reduction of http requests to YaCy using the correct cache-control,

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expires and last-modified headers in http response.
This commit is contained in:
Michael Peter Christen 2014-12-19 11:51:14 +01:00
parent eca578a5fa
commit c9c700b510
1 changed files with 17 additions and 0 deletions
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17
source/net/yacy/http/servlets/YaCyDefaultServlet.java
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@ -480,6 +480,9 @@ public class YaCyDefaultServlet extends HttpServlet {
byte[] data = dir.getBytes("UTF-8");
response.setContentType(TEXT_HTML_UTF_8.asString());
response.setContentLength(data.length);
response.setHeader(HeaderFramework.CACHE_CONTROL, "no-cache");
response.setDateHeader(HeaderFramework.EXPIRES, System.currentTimeMillis() + 10000); // consider that directories are not modified that often
response.setDateHeader(HeaderFramework.LAST_MODIFIED, resource.lastModified());
response.getOutputStream().write(data);
}
@ -511,6 +514,9 @@ public class YaCyDefaultServlet extends HttpServlet {
out = new WriterOutputStream(response.getWriter());
}
response.setDateHeader(HeaderFramework.EXPIRES, System.currentTimeMillis() + 600000); // expires ten minutes in the future
response.setDateHeader(HeaderFramework.LAST_MODIFIED, resource.lastModified());
if (reqRanges == null || !reqRanges.hasMoreElements() || content_length < 0) {
// if there were no ranges, send entire entity
if (include) {
@ -776,6 +782,17 @@ public class YaCyDefaultServlet extends HttpServlet {
File targetClass = rewriteClassFile(_resourceBase.addPath(target).getFile());
String targetExt = target.substring(target.lastIndexOf('.') + 1);
long now = System.currentTimeMillis();
response.setDateHeader(HeaderFramework.LAST_MODIFIED, now);
if (target.endsWith(".css")) {
response.setDateHeader(HeaderFramework.EXPIRES, now + 4000); // expires in 4 seconds (which is still too often)
} else if (target.endsWith(".png")) {
response.setDateHeader(HeaderFramework.EXPIRES, now + 1000); // expires in 1 seconds (reduce heavy image creation load)
} else {
response.setDateHeader(HeaderFramework.EXPIRES, now); // expires now
response.setHeader(HeaderFramework.CACHE_CONTROL, "no-cache");
}
if ((targetClass != null)) {
serverObjects args = new serverObjects();
Enumeration<String> argNames = request.getParameterNames();