remotebackend: Treat NULL as empty string in POST parameters

asString() cannot convert NULL to ""

(cherry picked from commit 4b8967c5f793810ad8ce399d155946c93e909bef)

diff --git a/modules/remotebackend/httpconnector.cc b/modules/remotebackend/httpconnector.cc
index bdafa3a80c84f2ff89d8afa2458f38730aff10fd..a154da134d516a9dcef568d378d1d7af0d6ece2a 100644 (file)
--- a/modules/remotebackend/httpconnector.cc
+++ b/modules/remotebackend/httpconnector.cc
@@ -80,10 +80,11 @@ std::string HTTPConnector::buildMemberListArgs(std::string prefix, const Json& a
     for(const auto& pair: args.object_items()) {
         if (pair.second.is_bool()) {
           stream << (pair.second.bool_value()?"1":"0");
+        } else if (pair.second.is_null()) {
+          stream << prefix << "[" << pair.first << "]=";
         } else {
           stream << prefix << "[" << pair.first << "]=" << this->asString(pair.second);
         }
-
         stream << "&";
     }