Adds verbose message when a resource is not found.

Fix #1309

Author: Felipe Zimmerle

src/operators/pm_from_file.cc

@@ -38,11 +38,12 @@ bool PmFromFile::init(const std::string &config, std::string *error) {
         }
         iss = new std::stringstream(client.content);
     } else {
-        std::string resource = utils::find_resource(m_param, config);
+        std::string err;
+        std::string resource = utils::find_resource(m_param, config, &err);
         iss = new std::ifstream(resource, std::ios::in);
 
         if (((std::ifstream *)iss)->is_open() == false) {
-            error->assign("Failed to open file: " + m_param);
+            error->assign("Failed to open file: " + m_param + ". " + err);
             delete iss;
             return false;
         }

src/operators/validate_dtd.cc

@@ -26,9 +26,10 @@ namespace operators {
 
 
 bool ValidateDTD::init(const std::string &file, std::string *error) {
-    m_resource = utils::find_resource(m_param, file);
+    std::string err;
+    m_resource = utils::find_resource(m_param, file, &err);
     if (m_resource == "") {
-        error->assign("XML: File not found: " + m_param + ".");
+        error->assign("XML: File not found: " + m_param + ". " + err);
         return false;
     }
 

src/operators/validate_schema.cc

@@ -26,9 +26,10 @@ namespace modsecurity {
 namespace operators {
 
 bool ValidateSchema::init(const std::string &file, std::string *error) {
-    m_resource = utils::find_resource(m_param, file);
+    std::string err;
+    m_resource = utils::find_resource(m_param, file, &err);
     if (m_resource == "") {
-        error->assign("XML: File not found: " + m_param + ".");
+        error->assign("XML: File not found: " + m_param + ". " + err);
         return false;
     }