Merge pull request #879 from pagespeed/oschaaf-trunk-tracking-server-header

server-header: improve handling of server header

src/ngx_pagespeed.cc

@@ -542,8 +542,6 @@ ngx_int_t copy_response_headers_to_ngx(
       continue;
     } else if (STR_EQ_LITERAL(name, "Transfer-Encoding")) {
       continue;
-    } else if (STR_EQ_LITERAL(name, "Server")) {
-      continue;
     }
 
     u_char* name_s = ngx_pstrdup(r->pool, &name);

test/nginx_system_test.sh

@@ -274,6 +274,8 @@ STATISTICS_URL=http://$PRIMARY_HOSTNAME/ngx_pagespeed_statistics
 
 # An expected failure can be indicated like: "~In-place resource optimization~"
 PAGESPEED_EXPECTED_FAILURES="
+~Override server header in resource flow.~
+~Override server header in IPRO flow.~
 "
 
 # Some tests are flakey under valgrind. For now, add them to the expected
@@ -1101,6 +1103,46 @@ start_test Base config has purging disabled.  Check error message syntax.
 OUT=$($WGET_DUMP "$HOSTNAME/pagespeed_admin/cache?purge=*")
 check_from "$OUT" fgrep -q "pagespeed EnableCachePurge on;"
 
+start_test Default server header in html flow.
+URL=http://headers.example.com/mod_pagespeed_example/
+OUT=$(http_proxy=$SECONDARY_HOSTNAME $WGET_DUMP -O /dev/null -S $URL 2>&1)
+# '|| true' in the line below supresses the exit code from grep when there is no
+# match in its input (1).
+MATCHES=$(echo "$OUT" | grep -c "Server: nginx/") || true
+check [ $MATCHES -eq 1 ]
+
+start_test Default server header in resource flow.
+URL=http://headers.example.com/mod_pagespeed_example/
+URL+=combine_javascript2.js+combine_javascript1.js.pagespeed.jc.0.js
+OUT=$(http_proxy=$SECONDARY_HOSTNAME $WGET_DUMP -O /dev/null -S $URL 2>&1)
+MATCHES=$(echo "$OUT" | grep -c "Server: nginx/") || true
+check [ $MATCHES -eq 1 ]
+
+start_test Default server header in IPRO flow.
+URL=http://headers.example.com//mod_pagespeed_example/combine_javascript2.js
+OUT=$(http_proxy=$SECONDARY_HOSTNAME $WGET_DUMP -O /dev/null -S $URL 2>&1)
+MATCHES=$(echo "$OUT" | grep -c "Server: nginx/") || true
+check [ $MATCHES -eq 1 ]
+
+start_test Override server header in html flow.
+URL=http://headers.example.com/mod_pagespeed_test/whitespace.html
+OUT=$(http_proxy=$SECONDARY_HOSTNAME $WGET_DUMP -O /dev/null -S $URL 2>&1)
+MATCHES=$(echo "$OUT" | grep -c "Server: override") || true
+check [ $MATCHES -eq 1 ]
+
+start_test Override server header in resource flow.
+URL=http://headers.example.com/mod_pagespeed_test/
+URL+=A.proxy_pass.css.pagespeed.cf.0.css
+OUT=$(http_proxy=$SECONDARY_HOSTNAME $WGET_DUMP -O /dev/null -S $URL 2>&1)
+MATCHES=$(echo "$OUT" | grep -c "Server: override") || true
+check [ $MATCHES -eq 1 ]
+
+start_test Override server header in IPRO flow.
+URL=http://headers.example.com/mod_pagespeed_test/proxy_pass.css
+OUT=$(http_proxy=$SECONDARY_HOSTNAME $WGET_DUMP -O /dev/null -S $URL 2>&1)
+MATCHES=$(echo "$OUT" | grep -c "Server: override") || true
+check [ $MATCHES -eq 1 ]
+
 if $USE_VALGRIND; then
     # It is possible that there are still ProxyFetches outstanding
     # at this point in time. Give them a few extra seconds to allow

test/pagespeed_test.conf.template

@@ -1180,6 +1180,22 @@ http {
     pagespeed EnableFilters rewrite_css;
   }
 
+  server {
+    listen @@SECONDARY_PORT@@;
+    listen [::]:@@SECONDARY_PORT@@;
+    server_name headers.example.com;
+    root "@@SERVER_ROOT@@";
+    pagespeed FileCachePath "@@FILE_CACHE@@_purge";
+    pagespeed RewriteLevel CoreFilters;
+
+    pagespeed InPlaceRewriteDeadlineMs -1;
+    pagespeed LoadFromFile "http://headers.example.com/"
+              "@@SERVER_ROOT@@/";
+    location /mod_pagespeed_test/ {
+      more_set_headers "Server: overriden";
+    }
+  }
+
   server {
     listen @@PRIMARY_PORT@@;
     listen [::]:@@PRIMARY_PORT@@;