api: show non JSON data as error message

dns-api.sh

@@ -17,6 +17,7 @@
 # 2022-01-14  v1.0  <axel.hahn@iml.unibe.ch>  1st public version
 # 2022-03-03  v1.1  <axel.hahn@iml.unibe.ch>  colored output if jq is found
 # 2022-06-14  v1.2  <axel.hahn@iml.unibe.ch>  debug comments are written to stderr 
+# 2022-09-14  v1.3  <axel.hahn@iml.unibe.ch>  show non JSON data as error message
 # ======================================================================
 
 
@@ -43,7 +44,13 @@ relUrl="$1"
 # ----- make curl request
 >&2 echo "; === DNS API :: $method ${relUrl}"
 
-curl -u $myauth -X $method "${mybaseurl}${relUrl}" 2>/dev/null \
-    | ( if which jq >/dev/null 2>&1; then jq; else cat; echo ; fi )
+out=$(curl -u $myauth -X $method "${mybaseurl}${relUrl}" 2>/dev/null)
+if echo "$out" | head -1 | grep '^[\[\{}]' >/dev/null ; then
+    echo "$out" | ( if which jq >/dev/null 2>&1; then jq; else cat; echo ; fi )
+else
+    echo ERROR:
+    echo "$out"
+    exit 1
+fi
 
 # ----------------------------------------------------------------------
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