Validate stuff returned by the curl.

docker/update_description.sh

@@ -14,6 +14,14 @@ DOCKERHUB_PASS="${DOCKERHUB_PASS}"
 
 # Get the JWT token
 TOKEN="$(curl -s -H "Content-Type: application/json" -X POST -d '{"username": "'${DOCKERHUB_USER}'", "password": "'${DOCKERHUB_PASS}'"}' https://hub.docker.com/v2/users/login/ | jq -r .token)"
+if [ -z "${TOKEN}" -o "${TOKEN}" = "null" ]
+then
+  echo "ERROR: Invalid or no JWT TOKEN returned!" 1>&2
+  exit 1
+fi
+
+BCSUM1="`jq -r .nonce < /dev/null | md5sum_q`"
+BCSUM2="`echo | md5sum_q`"
 
 OLDCSUM="`curl -s -H "Authorization: JWT ${TOKEN}" "https://hub.docker.com/v2/repositories/${DOCKER_REPO}/" | jq -r .full_description | md5sum_q`"
 NEWCSUM="`md5sum_q "${1}"`"
@@ -22,6 +30,11 @@ then
   # description is up to date already
   exit 0
 fi
+if [ "${OLDCSUM}" = "${BCSUM1}" -o "${OLDCSUM}" = "${BCSUM2}" ]
+then
+  echo "ERROR: Empty description read!" 1>&2
+  exit 1
+fi
 
 MYNAME="`basename "${0}"`"
 DESCRIPTION_FILE="`mktemp -t ${MYNAME}.XXXXXXX`"