Bash while loop with two string conditions

I have run into a bit of a problem with my bash script. My script among other things is starting a server that takes some time to get going. In order to combat the long startup, I have put in a while loop that queries the server to see if its running yet. ``` while [ $running -eq 0 ]; do echo "===" $response "==="; if [ "$response" == "" ] || [ "$response" == *"404 Not Found"* ]; then sleep 1; response=$(curl $ip:4502/libs/granite/core/content/login.html); else running=1; fi done ``` When exiting the loop $response equals the "404" string. If thats the case, the thing should still be in the loop, shouldn't it? Seems my loop is exiting prematurely. Joe