fixes to usage of no-cache: use and recognize also the no-store

directive

htroot/NetworkPicture.java

@@ -135,7 +135,7 @@ public class NetworkPicture {
                 env.getConfig(SwitchboardConstants.NETWORK_NAME, "unspecified"),
                 env.getConfig("network.unit.description", "unspecified"),
                 Long.parseLong(bgcolor, 16),
-                cyc), "png");
+                cyc), "png", false);
         lastAccessSeconds = System.currentTimeMillis() / 1000;
 
         sync.release();

source/net/yacy/crawler/retrieval/Response.java

@@ -354,7 +354,7 @@ public class Response {
             // if we have a pragma non-cache, we don't cache. usually if this is wanted from
             // the server, it makes sense
             String cacheControl = this.responseHeader.get(HeaderFramework.PRAGMA);
-            if (cacheControl != null && cacheControl.trim().toUpperCase().equals("NO-CACHE")) { return "controlled_no_cache"; }
+            if (cacheControl != null && cacheControl.trim().toUpperCase().contains("NO-CACHE")) { return "controlled_no_cache"; }
 
             // -expires in response
             // we do not care about expires, because at the time this is called the data is
@@ -443,12 +443,12 @@ public class Response {
 
             // if the client requests a un-cached copy of the resource ...
             cacheControl = this.requestHeader.get(HeaderFramework.PRAGMA);
-            if (cacheControl != null && cacheControl.trim().toUpperCase().equals("NO-CACHE")) { return false; }
+            if (cacheControl != null && cacheControl.trim().toUpperCase().contains("NO-CACHE")) { return false; }
 
             cacheControl = this.requestHeader.get(HeaderFramework.CACHE_CONTROL);
             if (cacheControl != null) {
                 cacheControl = cacheControl.trim().toUpperCase();
-                if (cacheControl.startsWith("NO-CACHE") || cacheControl.startsWith("MAX-AGE=0")) { return false; }
+                if (cacheControl.contains("NO-CACHE") || cacheControl.startsWith("MAX-AGE=0")) { return false; }
             }
 
             // -if-modified-since in request
@@ -487,7 +487,7 @@ public class Response {
             // because they cannot exist since they are not written to the cache.
             // So this IF should always fail..
             cacheControl = this.responseHeader.get(HeaderFramework.PRAGMA);
-            if (cacheControl != null && cacheControl.trim().toUpperCase().equals("NO-CACHE")) { return false; }
+            if (cacheControl != null && cacheControl.trim().toUpperCase().contains("NO-CACHE")) { return false; }
 
             // see for documentation also:
             // http://www.web-caching.com/cacheability.html
@@ -529,9 +529,9 @@ public class Response {
             // the cache-control has many value options.
             if (cacheControl != null) {
                 cacheControl = cacheControl.trim().toUpperCase();
-                if (cacheControl.startsWith("PRIVATE") ||
+                if (cacheControl.contains("PRIVATE") ||
-                    cacheControl.startsWith("NO-CACHE") ||
+                    cacheControl.contains("NO-CACHE") ||
-                    cacheControl.startsWith("NO-STORE")) {
+                    cacheControl.contains("NO-STORE")) {
                     // easy case
                     return false;
     //          } else if (cacheControl.startsWith("PUBLIC")) {
@@ -640,7 +640,7 @@ public class Response {
 
             // -pragma in cached response
             if (this.responseHeader.containsKey(HeaderFramework.PRAGMA) &&
-                (this.responseHeader.get(HeaderFramework.PRAGMA)).toUpperCase().equals("NO-CACHE")) {
+                (this.responseHeader.get(HeaderFramework.PRAGMA)).toUpperCase().contains("NO-CACHE")) {
                 return "Denied_(pragma_no_cache)";
             }
 
@@ -672,9 +672,9 @@ public class Response {
                    "private", "no-cache", "no-store" -- cannot be indexed
                    "max-age=<delta-seconds>" -- stale/fresh dependent on date
                  */
-                if (cacheControl.startsWith("PRIVATE") ||
+                if (cacheControl.contains("PRIVATE") ||
-                    cacheControl.startsWith("NO-CACHE") ||
+                    cacheControl.contains("NO-CACHE") ||
-                    cacheControl.startsWith("NO-STORE")) {
+                    cacheControl.contains("NO-STORE")) {
                     // easy case
                     return "Stale_(denied_by_cache-control=" + cacheControl + ")";
 //              } else if (cacheControl.startsWith("PUBLIC")) {

source/net/yacy/http/servlets/SolrSelectServlet.java

@@ -241,7 +241,7 @@ public class SolrSelectServlet extends HttpServlet {
                 rsp = ((EmbeddedSolrConnector) connector).query(req);
 
                 // prepare response
-                hresponse.setHeader("Cache-Control", "no-cache");
+                hresponse.setHeader("Cache-Control", "no-cache, no-store");
                 HttpCacheHeaderUtil.checkHttpCachingVeto(rsp, hresponse, reqMethod);
 
                 // check error

source/net/yacy/http/servlets/YaCyDefaultServlet.java

@@ -480,7 +480,7 @@ 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.setHeader(HeaderFramework.CACHE_CONTROL, "no-cache, no-store");
         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);
@@ -790,7 +790,6 @@ public class YaCyDefaultServlet extends HttpServlet  {
             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)) {
@@ -843,6 +842,9 @@ public class YaCyDefaultServlet extends HttpServlet  {
                 } else if (tmp instanceof EncodedImage) {
                     final EncodedImage yp = (EncodedImage) tmp;
                     result = yp.getImage();
+                    if (yp.isStatic()) {
+                        response.setDateHeader(HeaderFramework.EXPIRES, now + 600000); // expires in ten minutes
+                    }
                 } else if (tmp instanceof Image) {
                     final Image i = (Image) tmp;
 

source/net/yacy/peers/SeedDB.java

@@ -866,7 +866,7 @@ public final class SeedDB implements AlternativeDomainNames {
         // Configure http headers
         final RequestHeader reqHeader = new RequestHeader();
         reqHeader.put(HeaderFramework.PRAGMA, "no-cache");
-        reqHeader.put(HeaderFramework.CACHE_CONTROL, "no-cache"); // httpc uses HTTP/1.0 is this necessary?
+        reqHeader.put(HeaderFramework.CACHE_CONTROL, "no-cache, no-store"); // httpc uses HTTP/1.0 is this necessary?
         reqHeader.put(HeaderFramework.USER_AGENT, ClientIdentification.yacyInternetCrawlerAgent.userAgent);
 
         final HTTPClient client = new HTTPClient(ClientIdentification.yacyInternetCrawlerAgent);

source/net/yacy/search/Switchboard.java

@@ -3766,7 +3766,7 @@ public final class Switchboard extends serverSwitch {
                     //final long start = System.currentTimeMillis();
                     final RequestHeader reqHeader = new RequestHeader();
                     reqHeader.put(HeaderFramework.PRAGMA, "no-cache");
-                    reqHeader.put(HeaderFramework.CACHE_CONTROL, "no-cache");
+                    reqHeader.put(HeaderFramework.CACHE_CONTROL, "no-cache, no-store");
                     final HTTPClient client = new HTTPClient(ClientIdentification.yacyInternetCrawlerAgent, timeout);
                     client.setHeader(reqHeader.entrySet());
 

source/net/yacy/server/http/HTTPDemon.java

@@ -228,7 +228,7 @@ public final class HTTPDemon {
             header.put(HeaderFramework.DATE, systemDate);
             header.put(HeaderFramework.CONTENT_TYPE, "text/html");
             header.put(HeaderFramework.CONTENT_LENGTH, Integer.toString(result.length));
-            header.put(HeaderFramework.PRAGMA, "no-cache");
+            header.put(HeaderFramework.PRAGMA, "no-cache, no-store");
             sendRespondHeader(conProp,respond,httpVersion,httpStatusCode,httpStatusText,header);
 
             if (! method.equals(HeaderFramework.METHOD_HEAD)) {