From aa8edadf684ec511e8bffaf78efc10b9264140bf Mon Sep 17 00:00:00 2001
From: Leonardo Grasso <me@leonardograsso.com>
Date: Tue, 22 Sep 2020 17:44:57 +0200
Subject: [PATCH] new(userspace/falco): http output C++ impl

Signed-off-by: Leonardo Grasso <me@leonardograsso.com>
---
 userspace/falco/falco_outputs_http.cpp | 54 ++++++++++++++++++++++++++
 userspace/falco/falco_outputs_http.h   | 35 +++++++++++++++++
 2 files changed, 89 insertions(+)
 create mode 100644 userspace/falco/falco_outputs_http.cpp
 create mode 100644 userspace/falco/falco_outputs_http.h

diff --git a/userspace/falco/falco_outputs_http.cpp b/userspace/falco/falco_outputs_http.cpp
new file mode 100644
index 00000000..c32a113c
--- /dev/null
+++ b/userspace/falco/falco_outputs_http.cpp
@@ -0,0 +1,54 @@
+/*
+Copyright (C) 2020 The Falco Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+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
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#include "falco_outputs_http.h"
+#include "logger.h"
+#include "banned.h" // This raises a compilation error when certain functions are used
+
+void falco::outputs::output_http::output_event(gen_event *evt, std::string &rule, std::string &source,
+					       falco_common::priority_type priority, std::string &format, std::string &msg)
+{
+	output_msg(priority, msg);
+}
+
+void falco::outputs::output_http::output_msg(falco_common::priority_type priority, std::string &msg)
+{
+	CURL *curl = NULL;
+	CURLcode res = CURLE_FAILED_INIT;
+	struct curl_slist *slist1;
+	slist1 = NULL;
+
+	curl = curl_easy_init();
+	if(curl)
+	{
+		slist1 = curl_slist_append(slist1, "Content-Type: application/json");
+		curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist1);
+		curl_easy_setopt(curl, CURLOPT_URL, m_oc.options["url"].c_str());
+		curl_easy_setopt(curl, CURLOPT_POSTFIELDS, msg.c_str());
+		curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, -1L);
+
+		res = curl_easy_perform(curl);
+
+		if(res != CURLE_OK)
+		{
+			falco_logger::log(LOG_ERR, "libcurl error: " + string(curl_easy_strerror(res)));
+		}
+		curl_easy_cleanup(curl);
+		curl = NULL;
+		curl_slist_free_all(slist1);
+		slist1 = NULL;
+	}
+}
\ No newline at end of file
diff --git a/userspace/falco/falco_outputs_http.h b/userspace/falco/falco_outputs_http.h
new file mode 100644
index 00000000..39d01511
--- /dev/null
+++ b/userspace/falco/falco_outputs_http.h
@@ -0,0 +1,35 @@
+/*
+Copyright (C) 2020 The Falco Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+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
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#pragma once
+
+#include "falco_output.h"
+
+namespace falco
+{
+namespace outputs
+{
+
+class output_http : public output
+{
+	void output_event(gen_event *evt, std::string &rule, std::string &source,
+			  falco_common::priority_type priority, std::string &format, std::string &msg);
+
+	void output_msg(falco_common::priority_type priority, std::string &msg);
+};
+
+} // namespace outputs
+} // namespace falco