Fix: API queries on non-existant objects cause exception

fixes #11088

lib/remote/actionshandler.cpp

@@ -64,8 +64,8 @@ bool ActionsHandler::HandleRequest(const ApiUser::Ptr& user, HttpRequest& reques
 		try {
 			objs = FilterUtility::GetFilterTargets(qd, params, user);
 		} catch (const std::exception& ex) {
-			HttpUtility::SendJsonError(response, 400,
-			    "Type/Filter was required but not provided or was invalid.",
+			HttpUtility::SendJsonError(response, 404,
+			    "No objects found.",
 			    HttpUtility::GetLastParameter(params, "verboseErrors") ? DiagnosticInformation(ex) : "");
 			return true;
 		}

lib/remote/deleteobjecthandler.cpp

@@ -61,7 +61,16 @@ bool DeleteObjectHandler::HandleRequest(const ApiUser::Ptr& user, HttpRequest& r
 		params->Set(attr, request.RequestUrl->GetPath()[3]);
 	}
 
-	std::vector<Value> objs = FilterUtility::GetFilterTargets(qd, params, user);
+	std::vector<Value> objs;
+
+	try {
+		objs = FilterUtility::GetFilterTargets(qd, params, user);
+	} catch (const std::exception& ex) {
+		HttpUtility::SendJsonError(response, 404,
+		    "No objects found.",
+		    HttpUtility::GetLastParameter(params, "verboseErrors") ? DiagnosticInformation(ex) : "");
+		return true;
+	}
 
 	bool cascade = HttpUtility::GetLastParameter(params, "cascade");
 

lib/remote/modifyobjecthandler.cpp

@@ -59,7 +59,16 @@ bool ModifyObjectHandler::HandleRequest(const ApiUser::Ptr& user, HttpRequest& r
 		params->Set(attr, request.RequestUrl->GetPath()[3]);
 	}
 
-	std::vector<Value> objs = FilterUtility::GetFilterTargets(qd, params, user);
+	std::vector<Value> objs;
+
+	try {
+		objs = FilterUtility::GetFilterTargets(qd, params, user);
+	} catch (const std::exception& ex) {
+		HttpUtility::SendJsonError(response, 404,
+		    "No objects found.",
+		    HttpUtility::GetLastParameter(params, "verboseErrors") ? DiagnosticInformation(ex) : "");
+		return true;
+	}
 
 	Dictionary::Ptr attrs = params->Get("attrs");
 

lib/remote/objectqueryhandler.cpp

@@ -142,7 +142,16 @@ bool ObjectQueryHandler::HandleRequest(const ApiUser::Ptr& user, HttpRequest& re
 		params->Set(attr, request.RequestUrl->GetPath()[3]);
 	}
 
-	std::vector<Value> objs = FilterUtility::GetFilterTargets(qd, params, user);
+	std::vector<Value> objs;
+
+	try {
+		objs = FilterUtility::GetFilterTargets(qd, params, user);
+	} catch (const std::exception& ex) {
+		HttpUtility::SendJsonError(response, 404,
+		    "No objects found.",
+		    HttpUtility::GetLastParameter(params, "verboseErrors") ? DiagnosticInformation(ex) : "");
+		return true;
+	}
 
 	Array::Ptr results = new Array();
 	results->Reserve(objs.size());

lib/remote/statushandler.cpp

@@ -92,7 +92,16 @@ bool StatusHandler::HandleRequest(const ApiUser::Ptr& user, HttpRequest& request
 	if (request.RequestUrl->GetPath().size() >= 3)
 		params->Set("status", request.RequestUrl->GetPath()[2]);
 
-	std::vector<Value> objs = FilterUtility::GetFilterTargets(qd, params, user);
+	std::vector<Value> objs;
+
+	try {
+		objs = FilterUtility::GetFilterTargets(qd, params, user);
+	} catch (const std::exception& ex) {
+		HttpUtility::SendJsonError(response, 404,
+		    "No objects found.",
+		    HttpUtility::GetLastParameter(params, "verboseErrors") ? DiagnosticInformation(ex) : "");
+		return true;
+	}
 
 	Array::Ptr results = Array::FromVector(objs);
 

lib/remote/typequeryhandler.cpp

@@ -97,7 +97,16 @@ bool TypeQueryHandler::HandleRequest(const ApiUser::Ptr& user, HttpRequest& requ
 	if (request.RequestUrl->GetPath().size() >= 3)
 		params->Set("name", request.RequestUrl->GetPath()[2]);
 
-	std::vector<Value> objs = FilterUtility::GetFilterTargets(qd, params, user);
+	std::vector<Value> objs;
+
+	try {
+		objs = FilterUtility::GetFilterTargets(qd, params, user);
+	} catch (const std::exception& ex) {
+		HttpUtility::SendJsonError(response, 404,
+		    "No objects found.",
+		    HttpUtility::GetLastParameter(params, "verboseErrors") ? DiagnosticInformation(ex) : "");
+		return true;
+	}
 
 	Array::Ptr results = new Array();