fix https://github.com/Neilpang/acme.sh/issues/2503

acme.sh

@@ -1702,16 +1702,32 @@ _post() {
     fi
     _debug "_CURL" "$_CURL"
     if [ "$needbase64" ]; then
-      if [ "$_postContentType" ]; then
-        response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "Content-Type: $_postContentType" -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" --data "$body" "$_post_url" | _base64)"
+      if [ "$body" ]; then
+        if [ "$_postContentType" ]; then
+          response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "Content-Type: $_postContentType" -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" --data "$body" "$_post_url" | _base64)"
+        else
+          response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" --data "$body" "$_post_url" | _base64)"
+        fi
       else
-        response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" --data "$body" "$_post_url" | _base64)"
+        if [ "$_postContentType" ]; then
+          response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "Content-Type: $_postContentType" -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" "$_post_url" | _base64)"
+        else
+          response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" "$_post_url" | _base64)"
+        fi
       fi
     else
-      if [ "$_postContentType" ]; then
-        response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "Content-Type: $_postContentType" -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" --data "$body" "$_post_url")"
+      if [ "$body" ]; then
+        if [ "$_postContentType" ]; then
+          response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "Content-Type: $_postContentType" -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" --data "$body" "$_post_url")"
+        else
+          response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" --data "$body" "$_post_url")"
+        fi
       else
-        response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" --data "$body" "$_post_url")"
+        if [ "$_postContentType" ]; then
+          response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "Content-Type: $_postContentType" -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" "$_post_url")"
+        else
+          response="$($_CURL --user-agent "$USER_AGENT" -X $httpmethod -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" "$_post_url")"
+        fi
       fi
     fi
     _ret="$?"
@@ -1890,7 +1906,7 @@ _send_signed_request() {
       if [ "$ACME_NEW_NONCE" ]; then
         _debug2 "Get nonce with HEAD. ACME_NEW_NONCE" "$ACME_NEW_NONCE"
         nonceurl="$ACME_NEW_NONCE"
-        if _post "" "$nonceurl" "" "HEAD" "$__request_conent_type"; then
+        if _post "" "$nonceurl" "" "HEAD" "$__request_conent_type" >/dev/null; then
           _headers="$(cat "$HTTP_HEADER")"
           _debug2 _headers "$_headers"
           _CACHED_NONCE="$(echo "$_headers" | grep -i "Replay-Nonce:" | _head_n 1 | tr -d "\r\n " | cut -d ':' -f 2)"