Adds support to WEBAPPID variable

src/variables/web_app_id.h

@@ -0,0 +1,50 @@
+/*
+ * ModSecurity, http://www.modsecurity.org/
+ * Copyright (c) 2015 Trustwave Holdings, Inc. (http://www.trustwave.com/)
+ *
+ * You may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * If any of the files related to licensing are missing or if you have any
+ * other questions related to licensing please contact Trustwave Holdings, Inc.
+ * directly using the email address security@modsecurity.org.
+ *
+ */
+
+#include <iostream>
+#include <string>
+#include <vector>
+#include <list>
+#include <utility>
+
+#ifndef SRC_VARIABLES_WEB_APP_ID_H_
+#define SRC_VARIABLES_WEB_APP_ID_H_
+
+#include "src/variables/variable.h"
+#include "modsecurity/rule.h"
+
+namespace modsecurity {
+
+class Transaction;
+namespace Variables {
+
+class WebAppId : public Variable {
+ public:
+    explicit WebAppId()
+        : Variable("WEBAPPID") { }
+
+    void evaluate(Transaction *transaction,
+        Rule *rule,
+        std::vector<const collection::Variable *> *l) override {
+        const std::string name("WEBAPPID");
+        const std::string rname = transaction->m_rules->m_secWebAppId.m_value;
+        l->push_back(new collection::Variable(&m_name, &rname));
+    }
+};
+
+}  // namespace Variables
+}  // namespace modsecurity
+
+#endif  // SRC_VARIABLES_WEB_APP_ID_H_