pdns/ixfrdist-web.cc

   1 /*
   2  * This file is part of PowerDNS or dnsdist.
   3  * Copyright -- PowerDNS.COM B.V. and its contributors
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * In addition, for the avoidance of any doubt, permission is granted to
  10  * link this program with OpenSSL and to (re)distribute the binaries
  11  * produced as the result of such linking.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22 #include "ixfrdist-web.hh"
  23 #include <thread>
  24 #include "threadname.hh"
  25 #include "iputils.hh"
  26 #include "ixfrdist-stats.hh"
  27
  28 string doGetStats();
  29
  30 IXFRDistWebServer::IXFRDistWebServer(const ComboAddress &listenAddress, const NetmaskGroup &acl) :
  31   d_ws(std::unique_ptr<WebServer>(new WebServer(listenAddress.toString(), listenAddress.getPort())))
  32 {
  33   d_ws->setACL(acl);
  34   d_ws->registerWebHandler("/metrics", boost::bind(&IXFRDistWebServer::getMetrics, this, _1, _2));
  35   d_ws->bind();
  36 }
  37
  38 void IXFRDistWebServer::go() {
  39   setThreadName("ixfrdist/web");
  40   d_ws->go();
  41 }
  42
  43 void IXFRDistWebServer::getMetrics(HttpRequest* req, HttpResponse* resp) {
  44   if(req->method != "GET")
  45     throw HttpMethodNotAllowedException();
  46
  47   resp->body = doGetStats();
  48   resp->headers["Content-Type"] = "text/plain; version=0.0.4"; // https://prometheus.io/docs/instrumenting/exposition_formats/#text-based-format
  49   resp->status = 200;
  50 }