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+# Copyright (C) 2016 Christopher Baines <mail@cbaines.net>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+from prometheus_client.exposition import MetricsHandler
+
+index_page = """
+<!doctype html>
+
+<html lang="en">
+<head>
+ <meta charset="utf-8">
+
+ <title>Prometheus HAProxy Log Exporter</title>
+</head>
+
+<body>
+ <h1>HAProxy Log exporter for Prometheus</h1>
+
+ <p>
+ This is a highly configurable exporter for HAProxy.
+ </p>
+
+ <a href="/metrics">View metrics</a>
+
+ <h2>Example Configuration</h2>
+ <p>
+ You must configure Prometheus to scrape the metrics exported here. The port
+ is 9129, and the configuration should look something like the example
+ below.
+ </p>
+ <pre><code>
+ scrape_configs:
+ - job_name: haproxy_log
+ target_groups:
+ - targets:
+ - MACHINE_ADDRESS:9129
+ </code></pre>
+
+ <h2>Information</h2>
+ <p>
+ Copyright (C) 2016 Christopher Baines <mail@cbaines.net><br>
+ <a href="/licence">View Licence</a>
+ </p>
+
+ <p>
+ The source may be obtained from
+ <a href="http://git.cbaines.net/prometheus-haproxy-log-exporter/">
+ this Git repository</a>
+ </p>
+
+ <p>
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+ </p>
+
+ <p>
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Affero General Public License for more details.
+ </p>
+</body>
+</html>
+"""
+
+
+def create_request_handler(licence_location):
+ class RequestHandler(MetricsHandler):
+ def do_GET(self):
+ if self.path == "/metrics":
+ return super().do_GET()
+
+ self.send_response(200)
+ self.end_headers()
+
+ if self.path == "/licence":
+ with open(
+ licence_location,
+ 'rb',
+ ) as licence:
+ self.wfile.write(licence.read())
+ else:
+ self.wfile.write(index_page.encode('UTF-8'))
+
+ return RequestHandler