hack: benchmarking to use Content Type

hack: benchmarking to use Content Type: application/x-www-form-urlencoded

boom sends PUT request with Content-Type: text/html, and this cannot be parsed by etcd. It should use Content-Type: application/x-www-form-urlencoded. Post this fix the official etcd benchmarks should be updated as the keysize was not a factor as the value being set was always empty.

hack/benchmark/bench.sh

@@ -9,17 +9,17 @@ keyarray=( 64 256 )
 for keysize in ${keyarray[@]}; do
 
   echo write, 1 client, $keysize key size, to leader
-  ./boom -m PUT -n 10 -d value=`head -c $keysize < /dev/zero | tr '\0' '\141'` -c 1 $leader/v2/keys/foo | grep -e "Requests/sec" -e "Latency" -e "90%" | tr "\n" "\t" | xargs echo
+  ./boom -m PUT -n 10 -d value=`head -c $keysize < /dev/zero | tr '\0' '\141'` -c 1 -T application/x-www-form-urlencoded $leader/v2/keys/foo | grep -e "Requests/sec" -e "Latency" -e "90%" | tr "\n" "\t" | xargs echo
 
   echo write, 64 client, $keysize key size, to leader
-  ./boom -m PUT -n 640 -d value=`head -c $keysize < /dev/zero | tr '\0' '\141'` -c 64 $leader/v2/keys/foo | grep -e "Requests/sec" -e "Latency" -e "90%" | tr "\n" "\t" | xargs echo
+  ./boom -m PUT -n 640 -d value=`head -c $keysize < /dev/zero | tr '\0' '\141'` -c 64 -T application/x-www-form-urlencoded $leader/v2/keys/foo | grep -e "Requests/sec" -e "Latency" -e "90%" | tr "\n" "\t" | xargs echo
 
   echo write, 256 client, $keysize key size, to leader
-  ./boom -m PUT -n 2560 -d value=`head -c $keysize < /dev/zero | tr '\0' '\141'` -c 256 $leader/v2/keys/foo | grep -e "Requests/sec" -e "Latency" -e "90%" | tr "\n" "\t" | xargs echo
+  ./boom -m PUT -n 2560 -d value=`head -c $keysize < /dev/zero | tr '\0' '\141'` -c 256 -T application/x-www-form-urlencoded $leader/v2/keys/foo | grep -e "Requests/sec" -e "Latency" -e "90%" | tr "\n" "\t" | xargs echo
 
   echo write, 64 client, $keysize key size, to all servers
   for i in ${servers[@]}; do
-    ./boom -m PUT -n 210 -d value=`head -c $keysize < /dev/zero | tr '\0' '\141'` -c 21 $i/v2/keys/foo | grep -e "Requests/sec" -e "Latency" -e "90%" | tr "\n" "\t" | xargs echo &
+    ./boom -m PUT -n 210 -d value=`head -c $keysize < /dev/zero | tr '\0' '\141'` -c 21 -T application/x-www-form-urlencoded $i/v2/keys/foo | grep -e "Requests/sec" -e "Latency" -e "90%" | tr "\n" "\t" | xargs echo &
   done
   # wait for all booms to start running
   sleep 3
@@ -32,7 +32,7 @@ for keysize in ${keyarray[@]}; do
 
   echo write, 256 client, $keysize key size, to all servers
   for i in ${servers[@]}; do
-    ./boom -m PUT -n 850 -d value=`head -c $keysize < /dev/zero | tr '\0' '\141'` -c 85 $i/v2/keys/foo | grep -e "Requests/sec" -e "Latency" -e "90%" | tr "\n" "\t" | xargs echo &
+    ./boom -m PUT -n 850 -d value=`head -c $keysize < /dev/zero | tr '\0' '\141'` -c 85 -T application/x-www-form-urlencoded $i/v2/keys/foo | grep -e "Requests/sec" -e "Latency" -e "90%" | tr "\n" "\t" | xargs echo &
   done
   sleep 3
   for pid in $(pgrep 'boom'); do