http_load_isucon2 patch

http_load.diff

--- http_load/http_load-12mar2006/http_load.c	2006-03-13 04:17:03.000000000 +0900
+++ http_load_isucon2/http_load.c	2012-10-29 01:21:42.000000000 +0900
@@ -1019,13 +1019,21 @@
 	}
     else
 	bytes = snprintf(
-	    buf, sizeof(buf), "GET %.500s HTTP/1.0\r\n",
+	    buf, sizeof(buf), "GET %.500s HTTP/1.1\r\n",
 	    urls[url_num].filename );
     bytes += snprintf(
+        &buf[bytes], sizeof(buf) - bytes, "User-Agent: %s\r\n", "ISUCON Agent 2012" );
+    bytes += snprintf(
 	&buf[bytes], sizeof(buf) - bytes, "Host: %s\r\n",
 	urls[url_num].hostname );
     bytes += snprintf(
-	&buf[bytes], sizeof(buf) - bytes, "User-Agent: %s\r\n", VERSION );
+	&buf[bytes], sizeof(buf) - bytes, "Connection: close\r\n" );
+    bytes += snprintf(
+        &buf[bytes], sizeof(buf) - bytes, "Accept-Encoding: gzip\r\n" );
+    if (  (unsigned long) random() % 100 >= 97 ) {
+        bytes += snprintf(
+            &buf[bytes], sizeof(buf) - bytes, "Cache-Control: max-age=2\r\n" );
+    }
     bytes += snprintf( &buf[bytes], sizeof(buf) - bytes, "\r\n" );
 
     /* Send the request. */
@@ -1682,6 +1690,7 @@
 	++http_status_counts[connections[cnum].http_status];
 
     url_num = connections[cnum].url_num;
+    /*
     if ( do_checksum )
 	{
 	if ( ! urls[url_num].got_checksum )
@@ -1716,6 +1725,7 @@
 		}
 	    }
 	}
+    */
     }