SOLR-506 -- Emitting HTTP Cache headers can be enabled or disabled through configuration on a per-handler basis

git-svn-id: https://svn.apache.org/repos/asf/lucene/solr/trunk@683121 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -343,6 +343,9 @@ New Features
 
 68. SOLR-554: Hierarchical JDK log level selector for SOLR Admin replaces logging.jsp (Sean Timm via shalin)
 
+69. SOLR-506: Emitting HTTP Cache headers can be enabled or disabled through configuration
+              on a per-handler basis (shalin)
+    
 Changes in runtime behavior
  1. SOLR-559: use Lucene updateDocument, deleteDocuments methods.  This
    removes the maxBufferedDeletes parameter added by SOLR-310 as Lucene

src/java/org/apache/solr/handler/MoreLikeThisHandler.java

@@ -82,7 +82,6 @@ public class MoreLikeThisHandler extends RequestHandlerBase
   public void handleRequestBody(SolrQueryRequest req, SolrQueryResponse rsp) throws Exception 
   {
     RequestHandlerUtils.addExperimentalFormatWarning( rsp );
-    rsp.setHttpCaching(true);
 
     SolrParams params = req.getParams();
     SolrIndexSearcher searcher = req.getSearcher();

src/java/org/apache/solr/handler/RequestHandlerBase.java

@@ -50,6 +50,7 @@ public abstract class RequestHandlerBase implements SolrRequestHandler, SolrInfo
   protected SolrParams invariants;
   volatile long totalTime = 0;
   long handlerStart = System.currentTimeMillis();
+  protected boolean httpCaching = true;
 
   /** shorten the class references for utilities */
   private static class U extends SolrPluginUtils {
@@ -113,6 +114,11 @@ public abstract class RequestHandlerBase implements SolrRequestHandler, SolrInfo
         invariants = SolrParams.toSolrParams((NamedList)o);
       }
     }
+    
+    if (initArgs != null) {
+      Object caching = initArgs.get("httpCaching");
+      httpCaching = caching != null ? Boolean.parseBoolean(caching.toString()) : true;
+    }
   }
 
   public NamedList getInitArgs() {
@@ -125,6 +131,7 @@ public abstract class RequestHandlerBase implements SolrRequestHandler, SolrInfo
     numRequests++;
     try {
       U.setDefaults(req,defaults,appends,invariants);
+      rsp.setHttpCaching(httpCaching);
       handleRequestBody( req, rsp );
       // count timeouts
       boolean timedOut = (Boolean)rsp.getResponseHeader().get("partialResults") == null ? false : (Boolean)rsp.getResponseHeader().get("partialResults");

src/java/org/apache/solr/handler/SpellCheckerRequestHandler.java

@@ -263,7 +263,6 @@ public class SpellCheckerRequestHandler extends RequestHandlerBase implements So
   @Override
   public void handleRequestBody(SolrQueryRequest req, SolrQueryResponse rsp)
     throws Exception {
-    rsp.setHttpCaching(true);
     SolrParams p = req.getParams();
     String words = p.get("q");
     String cmd = p.get("cmd");

src/java/org/apache/solr/handler/component/SearchHandler.java

@@ -140,8 +140,6 @@ public class SearchHandler extends RequestHandlerBase implements SolrCoreAware
 
     final RTimer timer = rb.isDebug() ? new RTimer() : null;
 
-    rsp.setHttpCaching(true);
-    
     if (timer == null) {
       // non-debugging prepare phase
       for( SearchComponent c : components ) {

src/java/org/apache/solr/request/SolrQueryResponse.java

@@ -75,7 +75,7 @@ public class SolrQueryResponse {
   /**
    * Should this response be tagged with HTTP caching headers?
    */
-  protected boolean httpCaching=false;
+  protected boolean httpCaching=true;
   
   /***
    // another way of returning an error

src/test/test-files/solr/conf/solrconfig.xml

@@ -229,7 +229,9 @@
       The "standard" request handler is the default and will be used if qt
      is not specified in the request.
   -->
-  <requestHandler name="standard" class="solr.StandardRequestHandler"/>
+  <requestHandler name="standard" class="solr.StandardRequestHandler">
+  	<bool name="httpCaching">true</bool>
+  </requestHandler>
   <requestHandler name="dismaxOldStyleDefaults"
                   class="solr.DisMaxRequestHandler" >
      <!-- for historic reasons, DisMaxRequestHandler will use all of
@@ -302,7 +304,9 @@
   </requestHandler>
 
   <requestHandler name="/update"     class="solr.XmlUpdateRequestHandler"          />
-  <requestHandler name="/update/csv" class="solr.CSVRequestHandler" startup="lazy" />
+  <requestHandler name="/update/csv" class="solr.CSVRequestHandler" startup="lazy">
+  	<bool name="httpCaching">false</bool>
+  </requestHandler>
 
   <!-- test elevation -->
   <searchComponent name="elevate" class="org.apache.solr.handler.component.QueryElevationComponent" >