Merge pull request #1312 from zeha/api-set-ptr

[thirdparty/pdns.git] / pdns / ws-auth.cc

/*
    Copyright (C) 2002 - 2014  PowerDNS.COM BV

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License version 2
    as published by the Free Software Foundation

    Additionally, the license of this program contains a special
    exception which allows to distribute the program in binary form when
    it is linked against OpenSSL.

    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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
#include "utility.hh"
#include "dynlistener.hh"
#include "ws-auth.hh"
#include "json.hh"
#include "webserver.hh"
#include "logger.hh"
#include "packetcache.hh"
#include "statbag.hh"
#include "misc.hh"
#include "arguments.hh"
#include "dns.hh"
#include "comment.hh"
#include "ueberbackend.hh"
#include <boost/format.hpp>
#include <boost/foreach.hpp>
#include "namespaces.hh"
#include "rapidjson/document.h"
#include "rapidjson/stringbuffer.h"
#include "rapidjson/writer.h"
#include "ws-api.hh"
#include "version.hh"
#include <iomanip>

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif // HAVE_CONFIG_H

using namespace rapidjson;

extern StatBag S;

AuthWebServer::AuthWebServer()
{
  d_start=time(0);
  d_min10=d_min5=d_min1=0;
  d_ws = 0;
  d_tid = 0;
  if(arg().mustDo("webserver"))
    d_ws = new WebServer(arg()["webserver-address"], arg().asNum("webserver-port"),arg()["webserver-password"]);
}

void AuthWebServer::go()
{
  if(arg().mustDo("webserver"))
  {
    S.doRings();
    pthread_create(&d_tid, 0, webThreadHelper, this);
    pthread_create(&d_tid, 0, statThreadHelper, this);
  }
}

void AuthWebServer::statThread()
{
  try {
    for(;;) {
      d_queries.submit(S.read("udp-queries"));
      d_cachehits.submit(S.read("packetcache-hit"));
      d_cachemisses.submit(S.read("packetcache-miss"));
      d_qcachehits.submit(S.read("query-cache-hit"));
      d_qcachemisses.submit(S.read("query-cache-miss"));
      Utility::sleep(1);
    }
  }
  catch(...) {
    L<<Logger::Error<<"Webserver statThread caught an exception, dying"<<endl;
    exit(1);
  }
}

void *AuthWebServer::statThreadHelper(void *p)
{
  AuthWebServer *self=static_cast<AuthWebServer *>(p);
  self->statThread();
  return 0; // never reached
}

void *AuthWebServer::webThreadHelper(void *p)
{
  AuthWebServer *self=static_cast<AuthWebServer *>(p);
  self->webThread();
  return 0; // never reached
}

static string htmlescape(const string &s) {
  string result;
  for(string::const_iterator it=s.begin(); it!=s.end(); ++it) {
    switch (*it) {
    case '&':
      result += "&amp;";
      break;
    case '<':
      result += "&lt;";
      break;
    case '>':
      result += "&gt;";
      break;
    default:
      result += *it;
    }
  }
  return result;
}

void printtable(ostringstream &ret, const string &ringname, const string &title, int limit=10)
{
  int tot=0;
  int entries=0;
  vector<pair <string,unsigned int> >ring=S.getRing(ringname);

  for(vector<pair<string, unsigned int> >::const_iterator i=ring.begin(); i!=ring.end();++i) {
    tot+=i->second;
    entries++;
  }

  ret<<"<div class=\"panel\">";
  ret<<"<span class=resetring><i></i><a href=\"?resetring="<<ringname<<"\">Reset</a></span>"<<endl;
  ret<<"<h2>"<<title<<"</h2>"<<endl;
  ret<<"<div class=ringmeta>";
  ret<<"<a class=topXofY href=\"?ring="<<ringname<<"\">Showing: Top "<<limit<<" of "<<entries<<"</a>"<<endl;
  ret<<"<span class=resizering>Resize: ";
  unsigned int sizes[]={10,100,500,1000,10000,500000,0};
  for(int i=0;sizes[i];++i) {
    if(S.getRingSize(ringname)!=sizes[i])
      ret<<"<a href=\"?resizering="<<ringname<<"&amp;size="<<sizes[i]<<"\">"<<sizes[i]<<"</a> ";
    else
      ret<<"("<<sizes[i]<<") ";
  }
  ret<<"</span></div>";

  ret<<"<table class=\"data\">";
  int printed=0;
  int total=max(1,tot);
  for(vector<pair<string,unsigned int> >::const_iterator i=ring.begin();limit && i!=ring.end();++i,--limit) {
    ret<<"<tr><td>"<<htmlescape(i->first)<<"</td><td>"<<i->second<<"</td><td align=right>"<< AuthWebServer::makePercentage(i->second*100.0/total)<<"</td>"<<endl;
    printed+=i->second;
  }
  ret<<"<tr><td colspan=3></td></tr>"<<endl;
  if(printed!=tot)
    ret<<"<tr><td><b>Rest:</b></td><td><b>"<<tot-printed<<"</b></td><td align=right><b>"<< AuthWebServer::makePercentage((tot-printed)*100.0/total)<<"</b></td>"<<endl;

  ret<<"<tr><td><b>Total:</b></td><td><b>"<<tot<<"</b></td><td align=right><b>100%</b></td>";
  ret<<"</table></div>"<<endl;
}

void AuthWebServer::printvars(ostringstream &ret)
{
  ret<<"<div class=panel><h2>Variables</h2><table class=\"data\">"<<endl;

  vector<string>entries=S.getEntries();
  for(vector<string>::const_iterator i=entries.begin();i!=entries.end();++i) {
    ret<<"<tr><td>"<<*i<<"</td><td>"<<S.read(*i)<<"</td><td>"<<S.getDescrip(*i)<<"</td>"<<endl;
  }

  ret<<"</table></div>"<<endl;
}

void AuthWebServer::printargs(ostringstream &ret)
{
  ret<<"<table border=1><tr><td colspan=3 bgcolor=\"#0000ff\"><font color=\"#ffffff\">Arguments</font></td>"<<endl;

  vector<string>entries=arg().list();
  for(vector<string>::const_iterator i=entries.begin();i!=entries.end();++i) {
    ret<<"<tr><td>"<<*i<<"</td><td>"<<arg()[*i]<<"</td><td>"<<arg().getHelp(*i)<<"</td>"<<endl;
  }
}

string AuthWebServer::makePercentage(const double& val)
{
  return (boost::format("%.01f%%") % val).str();
}

void AuthWebServer::indexfunction(HttpRequest* req, HttpResponse* resp)
{
  if(!req->parameters["resetring"].empty()) {
    if (S.ringExists(req->parameters["resetring"]))
      S.resetRing(req->parameters["resetring"]);
    resp->status = 301;
    resp->headers["Location"] = "/";
    return;
  }
  if(!req->parameters["resizering"].empty()){
    int size=atoi(req->parameters["size"].c_str());
    if (S.ringExists(req->parameters["resizering"]) && size > 0 && size <= 500000)
      S.resizeRing(req->parameters["resizering"], atoi(req->parameters["size"].c_str()));
    resp->status = 301;
    resp->headers["Location"] = "/";
    return;
  }

  ostringstream ret;

  ret<<"<!DOCTYPE html>"<<endl;
  ret<<"<html><head>"<<endl;
  ret<<"<title>PowerDNS Authoritative Server Monitor</title>"<<endl;
  ret<<"<link rel=\"stylesheet\" href=\"style.css\"/>"<<endl;
  ret<<"</head><body>"<<endl;

  ret<<"<div class=\"row\">"<<endl;
  ret<<"<div class=\"headl columns\">";
  ret<<"<a href=\"/\" id=\"appname\">PowerDNS "VERSION;
  if(!arg()["config-name"].empty()) {
    ret<<" ["<<arg()["config-name"]<<"]";
  }
  ret<<"</a></div>"<<endl;
  ret<<"<div class=\"headr columns\"></div></div>";
  ret<<"<div class=\"row\"><div class=\"all columns\">";

  time_t passed=time(0)-s_starttime;

  ret<<"<p>Uptime: "<<
    humanDuration(passed)<<
    "<br>"<<endl;

  ret<<"Queries/second, 1, 5, 10 minute averages:  "<<std::setprecision(3)<<
    d_queries.get1()<<", "<<
    d_queries.get5()<<", "<<
    d_queries.get10()<<". Max queries/second: "<<d_queries.getMax()<<
    "<br>"<<endl;
  
  if(d_cachemisses.get10()+d_cachehits.get10()>0)
    ret<<"Cache hitrate, 1, 5, 10 minute averages: "<<
      makePercentage((d_cachehits.get1()*100.0)/((d_cachehits.get1())+(d_cachemisses.get1())))<<", "<<
      makePercentage((d_cachehits.get5()*100.0)/((d_cachehits.get5())+(d_cachemisses.get5())))<<", "<<
      makePercentage((d_cachehits.get10()*100.0)/((d_cachehits.get10())+(d_cachemisses.get10())))<<
      "<br>"<<endl;

  if(d_qcachemisses.get10()+d_qcachehits.get10()>0)
    ret<<"Backend query cache hitrate, 1, 5, 10 minute averages: "<<std::setprecision(2)<<
      makePercentage((d_qcachehits.get1()*100.0)/((d_qcachehits.get1())+(d_qcachemisses.get1())))<<", "<<
      makePercentage((d_qcachehits.get5()*100.0)/((d_qcachehits.get5())+(d_qcachemisses.get5())))<<", "<<
      makePercentage((d_qcachehits.get10()*100.0)/((d_qcachehits.get10())+(d_qcachemisses.get10())))<<
      "<br>"<<endl;

  ret<<"Backend query load, 1, 5, 10 minute averages: "<<std::setprecision(3)<<
    d_qcachemisses.get1()<<", "<<
    d_qcachemisses.get5()<<", "<<
    d_qcachemisses.get10()<<". Max queries/second: "<<d_qcachemisses.getMax()<<
    "<br>"<<endl;

  ret<<"Total queries: "<<S.read("udp-queries")<<". Question/answer latency: "<<S.read("latency")/1000.0<<"ms</p><br>"<<endl;
  if(req->parameters["ring"].empty()) {
    vector<string>entries=S.listRings();
    for(vector<string>::const_iterator i=entries.begin();i!=entries.end();++i)
      printtable(ret,*i,S.getRingTitle(*i));

    printvars(ret);
    if(arg().mustDo("webserver-print-arguments"))
      printargs(ret);
  }
  else
    printtable(ret,req->parameters["ring"],S.getRingTitle(req->parameters["ring"]),100);

  ret<<"</div></div>"<<endl;
  ret<<"<footer class=\"row\">"<<fullVersionString()<<"<br>&copy; 2013 <a href=\"http://www.powerdns.com/\">PowerDNS.COM BV</a>.</footer>"<<endl;
  ret<<"</body></html>"<<endl;

  resp->body = ret.str();
}

static void fillZone(const string& zonename, HttpResponse* resp) {
  UeberBackend B;
  DomainInfo di;
  if(!B.getDomainInfo(zonename, di))
    throw ApiException("Could not find domain '"+zonename+"'");

  Document doc;
  doc.SetObject();

  // id is the canonical lookup key, which doesn't actually match the name (in some cases)
  string zoneId = apiZoneNameToId(di.zone);
  Value jzoneId(zoneId.c_str(), doc.GetAllocator()); // copy
  doc.AddMember("id", jzoneId, doc.GetAllocator());
  string url = "/servers/localhost/zones/" + zoneId;
  Value jurl(url.c_str(), doc.GetAllocator()); // copy
  doc.AddMember("url", jurl, doc.GetAllocator());
  doc.AddMember("name", di.zone.c_str(), doc.GetAllocator());
  doc.AddMember("type", "Zone", doc.GetAllocator());
  doc.AddMember("kind", di.getKindString(), doc.GetAllocator());
  Value masters;
  masters.SetArray();
  BOOST_FOREACH(const string& master, di.masters) {
    Value value(master.c_str(), doc.GetAllocator());
    masters.PushBack(value, doc.GetAllocator());
  }
  doc.AddMember("masters", masters, doc.GetAllocator());
  doc.AddMember("serial", di.serial, doc.GetAllocator());
  doc.AddMember("notified_serial", di.notified_serial, doc.GetAllocator());
  doc.AddMember("last_check", (unsigned int) di.last_check, doc.GetAllocator());

  // fill records
  DNSResourceRecord rr;
  Value records;
  records.SetArray();
  di.backend->list(zonename, di.id, true); // incl. disabled
  while(di.backend->get(rr)) {
    if (!rr.qtype.getCode())
      continue; // skip empty non-terminals

    Value object;
    object.SetObject();
    Value jname(rr.qname.c_str(), doc.GetAllocator()); // copy
    object.AddMember("name", jname, doc.GetAllocator());
    Value jtype(rr.qtype.getName().c_str(), doc.GetAllocator()); // copy
    object.AddMember("type", jtype, doc.GetAllocator());
    object.AddMember("ttl", rr.ttl, doc.GetAllocator());
    object.AddMember("priority", rr.priority, doc.GetAllocator());
    object.AddMember("disabled", rr.disabled, doc.GetAllocator());
    Value jcontent(rr.content.c_str(), doc.GetAllocator()); // copy
    object.AddMember("content", jcontent, doc.GetAllocator());
    records.PushBack(object, doc.GetAllocator());
  }
  doc.AddMember("records", records, doc.GetAllocator());

  // fill comments
  Comment comment;
  Value comments;
  comments.SetArray();
  di.backend->listComments(di.id);
  while(di.backend->getComment(comment)) {
    Value object;
    object.SetObject();
    Value jname(comment.qname.c_str(), doc.GetAllocator()); // copy
    object.AddMember("name", jname, doc.GetAllocator());
    Value jtype(comment.qtype.getName().c_str(), doc.GetAllocator()); // copy
    object.AddMember("type", jtype, doc.GetAllocator());
    object.AddMember("modified_at", (unsigned int) comment.modified_at, doc.GetAllocator());
    Value jaccount(comment.account.c_str(), doc.GetAllocator()); // copy
    object.AddMember("account", jaccount, doc.GetAllocator());
    Value jcontent(comment.content.c_str(), doc.GetAllocator()); // copy
    object.AddMember("content", jcontent, doc.GetAllocator());
    comments.PushBack(object, doc.GetAllocator());
  }
  doc.AddMember("comments", comments, doc.GetAllocator());

  resp->setBody(doc);
}

void productServerStatisticsFetch(map<string,string>& out)
{
  vector<string> items = S.getEntries();
  BOOST_FOREACH(const string& item, items) {
    out[item] = lexical_cast<string>(S.read(item));
  }

  // add uptime
  out["uptime"] = lexical_cast<string>(time(0) - s_starttime);
}

static void apiServerZoneRRset(HttpRequest* req, HttpResponse* resp);

static void apiServerZones(HttpRequest* req, HttpResponse* resp) {
  UeberBackend B;
  if (req->method == "POST") {
    DomainInfo di;
    Document document;
    req->json(document);
    string zonename = stringFromJson(document, "name");
    // TODO: better validation of zonename
    if(zonename.empty())
      throw ApiException("Zone name empty");

    string kind = stringFromJson(document, "kind");

    bool exists = B.getDomainInfo(zonename, di);
    if(exists)
      throw ApiException("Domain '"+zonename+"' already exists");

    const Value &nameservers = document["nameservers"];
    if (!nameservers.IsArray() || nameservers.Size() == 0)
      throw ApiException("Need at least one nameserver");

    string master;
    const Value &masters = document["masters"];
    if (masters.IsArray()) {
      for (SizeType i = 0; i < masters.Size(); ++i) {
        master += masters[i].GetString();
        master += " ";
      }
    }

    // no going back after this
    if(!B.createDomain(zonename))
      throw ApiException("Creating domain '"+zonename+"' failed");

    if(!B.getDomainInfo(zonename, di))
      throw ApiException("Creating domain '"+zonename+"' failed: lookup of domain ID failed");

    vector<DNSResourceRecord> rrset;

    // create SOA record so zone "really" exists
    DNSResourceRecord rr;
    rr.qname = zonename;
    rr.content = (boost::format("%s hostmaster@%s %d")
                  % nameservers[SizeType(0)].GetString()
                  % zonename
                  % intFromJson(document, "serial", 1)
      ).str();
    SOAData sd;
    fillSOAData(rr.content, sd);
    rr.content = serializeSOAData(sd);
    rr.qtype = "SOA";
    rr.domain_id = di.id;
    rr.auth = 1;
    rr.ttl = ::arg().asNum( "default-ttl" );
    rr.priority = 0;
    rrset.push_back(rr);

    for (SizeType i = 0; i < nameservers.Size(); ++i) {
      rr.content = nameservers[i].GetString();
      rr.qtype = "NS";
      rrset.push_back(rr);
    }

    di.backend->startTransaction(zonename, di.id);
    BOOST_FOREACH(rr, rrset) {
      di.backend->feedRecord(rr);
    }
    di.backend->commitTransaction();

    di.backend->setKind(zonename, DomainInfo::stringToKind(kind));
    di.backend->setMaster(zonename, master);

    fillZone(zonename, resp);
    return;
  }

  if(req->method != "GET")
    throw HttpMethodNotAllowedException();

  vector<DomainInfo> domains;
  B.getAllDomains(&domains, true); // incl. disabled

  Document doc;
  doc.SetArray();

  BOOST_FOREACH(const DomainInfo& di, domains) {
    Value jdi;
    jdi.SetObject();
    // id is the canonical lookup key, which doesn't actually match the name (in some cases)
    string zoneId = apiZoneNameToId(di.zone);
    Value jzoneId(zoneId.c_str(), doc.GetAllocator()); // copy
    jdi.AddMember("id", jzoneId, doc.GetAllocator());
    string url = "/servers/localhost/zones/" + zoneId;
    Value jurl(url.c_str(), doc.GetAllocator()); // copy
    jdi.AddMember("url", jurl, doc.GetAllocator());
    jdi.AddMember("name", di.zone.c_str(), doc.GetAllocator());
    jdi.AddMember("kind", di.getKindString(), doc.GetAllocator());
    Value masters;
    masters.SetArray();
    BOOST_FOREACH(const string& master, di.masters) {
      Value value(master.c_str(), doc.GetAllocator());
      masters.PushBack(value, doc.GetAllocator());
    }
    jdi.AddMember("masters", masters, doc.GetAllocator());
    jdi.AddMember("serial", di.serial, doc.GetAllocator());
    jdi.AddMember("notified_serial", di.notified_serial, doc.GetAllocator());
    jdi.AddMember("last_check", (unsigned int) di.last_check, doc.GetAllocator());
    doc.PushBack(jdi, doc.GetAllocator());
  }
  resp->setBody(doc);
}

static void apiServerZoneDetail(HttpRequest* req, HttpResponse* resp) {
  string zonename = apiZoneIdToName(req->path_parameters["id"]);

  if(req->method == "PUT") {
    // update domain settings
    UeberBackend B;
    DomainInfo di;
    if(!B.getDomainInfo(zonename, di))
      throw ApiException("Could not find domain '"+zonename+"'");

    Document document;
    req->json(document);

    string master;
    const Value &masters = document["masters"];
    if (masters.IsArray()) {
      for(SizeType i = 0; i < masters.Size(); ++i) {
        master += masters[i].GetString();
        master += " ";
      }
    }

    di.backend->setKind(zonename, DomainInfo::stringToKind(stringFromJson(document, "kind")));
    di.backend->setMaster(zonename, master);
    fillZone(zonename, resp);
    return;
  }
  else if(req->method == "DELETE") {
    // delete domain
    UeberBackend B;
    DomainInfo di;
    if(!B.getDomainInfo(zonename, di))
      throw ApiException("Could not find domain '"+zonename+"'");

    if(!di.backend->deleteDomain(zonename))
      throw ApiException("Deleting domain '"+zonename+"' failed: backend delete failed/unsupported");

    // empty body on success
    resp->body = "";
    return;
  } else if (req->method == "PATCH") {
    apiServerZoneRRset(req, resp);
    return;
  } else if (req->method == "GET") {
    fillZone(zonename, resp);
    return;
  }

  throw HttpMethodNotAllowedException();
}

static void makePtr(const DNSResourceRecord& rr, DNSResourceRecord* ptr) {
  if (rr.qtype.getCode() == QType::A) {
    uint32_t ip;
    if (!IpToU32(rr.content, &ip)) {
      throw ApiException("PTR: Invalid IP address given");
    }
    ptr->qname = (boost::format("%u.%u.%u.%u.in-addr.arpa")
                  % ((ip >> 24) & 0xff)
                  % ((ip >> 16) & 0xff)
                  % ((ip >>  8) & 0xff)
                  % ((ip      ) & 0xff)
      ).str();
  } else if (rr.qtype.getCode() == QType::AAAA) {
    ComboAddress ca(rr.content);
    string tmp;
    for (int group = 0; group < 8; ++group) {
      tmp += (boost::format("%04x") % ntohs(ca.sin6.sin6_addr.s6_addr16[group])).str();
    }
    ostringstream ss;
    size_t npos = tmp.size();
    while (npos--) {
      ss << tmp[npos] << ".";
    }
    ss << "ip6.arpa";
    ptr->qname = ss.str();
  } else {
    throw ApiException("Unsupported PTR source '" + rr.qname + "' type '" + rr.qtype.getName() + "'");
  }

  ptr->qtype = "PTR";
  ptr->ttl = rr.ttl;
  ptr->disabled = rr.disabled;
  ptr->priority = 0;
  ptr->content = rr.qname;
}

static void apiServerZoneRRset(HttpRequest* req, HttpResponse* resp) {
  if(req->method != "PATCH")
    throw HttpMethodNotAllowedException();

  UeberBackend B;
  DomainInfo di;
  string zonename = apiZoneIdToName(req->path_parameters["id"]);
  if(!B.getDomainInfo(zonename, di))
    throw ApiException("Could not find domain '"+zonename+"'");

  Document document;
  req->json(document);

  string qname, changetype;
  QType qtype;
  qname = stringFromJson(document, "name");
  qtype = stringFromJson(document, "type");
  changetype = toUpper(stringFromJson(document, "changetype"));

  string dotsuffix = "." + zonename;
  if(!iends_with(qname, dotsuffix) && qname != zonename)
    throw ApiException("RRset "+qname+" IN "+qtype.getName()+": Name is out of zone");

  if (changetype == "DELETE") {
    // delete all matching qname/qtype RRs (and, implictly comments).
    if (!di.backend->replaceRRSet(di.id, qname, qtype, vector<DNSResourceRecord>())) {
      throw ApiException("Hosting backend does not support editing records.");
    }
  }
  else if (changetype == "REPLACE") {
    vector<DNSResourceRecord> new_records;
    vector<Comment> new_comments;
    vector<DNSResourceRecord> new_ptrs;
    bool replace_records = false;
    bool replace_comments = false;

    // gather records
    DNSResourceRecord rr;
    const Value& records = document["records"];
    if (records.IsArray()) {
      replace_records = true;
      for(SizeType idx = 0; idx < records.Size(); ++idx) {
        const Value& record = records[idx];
        rr.qname = stringFromJson(record, "name");
        rr.content = stringFromJson(record, "content");
        rr.qtype = stringFromJson(record, "type");
        rr.domain_id = di.id;
        rr.auth = 1;
        rr.ttl = intFromJson(record, "ttl");
        rr.priority = intFromJson(record, "priority");
        rr.disabled = boolFromJson(record, "disabled");

        if(rr.qtype.getCode() == QType::MX || rr.qtype.getCode() == QType::SRV)
          rr.content = lexical_cast<string>(rr.priority)+" "+rr.content;

        if(rr.qname != qname || rr.qtype != qtype)
          throw ApiException("Record "+rr.qname+" IN "+rr.qtype.getName()+" "+rr.content+": Record bundled with wrong RRset");

        try {
          shared_ptr<DNSRecordContent> drc(DNSRecordContent::mastermake(rr.qtype.getCode(), 1, rr.content));
          string tmp = drc->serialize(rr.qname);
        }
        catch(std::exception& e)
        {
          throw ApiException("Record "+rr.qname+" IN "+rr.qtype.getName()+" "+rr.content+": "+e.what());
        }

        if ((rr.qtype.getCode() == QType::A || rr.qtype.getCode() == QType::AAAA) &&
            boolFromJson(record, "set-ptr", false) == true) {
          DNSResourceRecord ptr;
          makePtr(rr, &ptr);

          // verify that there's a zone for the PTR
          DNSPacket fakePacket;
          SOAData sd;
          fakePacket.qtype = QType::PTR;
          if (!B.getAuth(&fakePacket, &sd, ptr.qname, 0))
            throw ApiException("Could not find domain for PTR '"+ptr.qname+"' requested for '"+ptr.content+"'");

          ptr.domain_id = sd.domain_id;
          new_ptrs.push_back(ptr);
        }

        new_records.push_back(rr);
      }
    }

    // gather comments
    Comment c;
    c.domain_id = di.id;
    c.qname = qname;
    c.qtype = qtype;
    time_t now = time(0);
    const Value& comments = document["comments"];
    if (comments.IsArray()) {
      replace_comments = true;
      for(SizeType idx = 0; idx < comments.Size(); ++idx) {
        const Value& comment = comments[idx];
        c.modified_at = intFromJson(comment, "modified_at", now);
        c.content = stringFromJson(comment, "content");
        c.account = stringFromJson(comment, "account");
        new_comments.push_back(c);
      }
    }

    if (!replace_records && !replace_comments) {
      throw ApiException("No change");
    }

    // Actually store the change(s).
    di.backend->startTransaction(qname);
    if (replace_records) {
      if (!di.backend->replaceRRSet(di.id, qname, qtype, new_records)) {
        throw ApiException("Hosting backend does not support editing records.");
      }
    }
    if (replace_comments) {
      if (!di.backend->replaceComments(di.id, qname, qtype, new_comments)) {
        throw ApiException("Hosting backend does not support editing comments.");
      }
    }
    di.backend->commitTransaction();

    // now the PTRs
    BOOST_FOREACH(const DNSResourceRecord& rr, new_ptrs) {
      DNSPacket fakePacket;
      SOAData sd;
      sd.db = (DNSBackend *)-1;
      fakePacket.qtype = QType::PTR;

      if (!B.getAuth(&fakePacket, &sd, rr.qname, 0))
        throw ApiException("Could not find domain for PTR '"+rr.qname+"' requested for '"+rr.content+"' (while saving)");

      sd.db->startTransaction(rr.qname);
      if (!sd.db->replaceRRSet(sd.domain_id, rr.qname, rr.qtype, vector<DNSResourceRecord>(1, rr))) {
        throw ApiException("PTR-Hosting backend does not support editing records.");
      }
      sd.db->commitTransaction();
    }

  }
  else
    throw ApiException("Changetype not understood");

  extern PacketCache PC;
  PC.purge(qname);

  // success
  resp->body = "{}";
}

void AuthWebServer::jsonstat(HttpRequest* req, HttpResponse* resp)
{
  string command;

  if(req->parameters.count("command")) {
    command = req->parameters["command"];
    req->parameters.erase("command");
  }

  if(command == "flush-cache") {
    extern PacketCache PC;
    int number; 
    if(req->parameters["domain"].empty())
      number = PC.purge();
    else
      number = PC.purge(req->parameters["domain"]);
      
    map<string, string> object;
    object["number"]=lexical_cast<string>(number);
    //cerr<<"Flushed cache for '"<<parameters["domain"]<<"', cleaned "<<number<<" records"<<endl;
    resp->body = returnJsonObject(object);
    return;
  }
  else if(command == "pdns-control") {
    if(req->method!="POST")
      throw HttpMethodNotAllowedException();
    // cout<<"post: "<<post<<endl;
    rapidjson::Document document;
    req->json(document);
    // cout<<"Parameters: '"<<document["parameters"].GetString()<<"'\n";
    vector<string> parameters;
    stringtok(parameters, document["parameters"].GetString(), " \t");
    
    DynListener::g_funk_t* ptr=0;
    if(!parameters.empty())
      ptr = DynListener::getFunc(toUpper(parameters[0]));
    map<string, string> m;
    
    if(ptr) {
      m["result"] = (*ptr)(parameters, 0);
    } else {
      resp->status = 404;
      m["error"]="No such function "+toUpper(parameters[0]);
    }
    resp->body = returnJsonObject(m);
    return;
  }
  else if(command=="log-grep") {
    // legacy parameter name hack
    req->parameters["q"] = req->parameters["needle"];
    apiServerSearchLog(req, resp);
    return;
  }

  resp->body = returnJsonError("No or unknown command given");
  resp->status = 404;
  return;
}

void AuthWebServer::cssfunction(HttpRequest* req, HttpResponse* resp)
{
  resp->headers["Cache-Control"] = "max-age=86400";
  resp->headers["Content-Type"] = "text/css";

  ostringstream ret;
  ret<<"* { box-sizing: border-box; margin: 0; padding: 0; }"<<endl;
  ret<<"body { color: black; background: white; margin-top: 1em; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 10pt; position: relative; }"<<endl;
  ret<<"a { color: #0959c2; }"<<endl;
  ret<<"a:hover { color: #3B8EC8; }"<<endl;
  ret<<".row { width: 940px; max-width: 100%; min-width: 768px; margin: 0 auto; }"<<endl;
  ret<<".row:before, .row:after { display: table; content:\" \"; }"<<endl;
  ret<<".row:after { clear: both; }"<<endl;
  ret<<".columns { position: relative; min-height: 1px; float: left; }"<<endl;
  ret<<".all { width: 100%; }"<<endl;
  ret<<".headl { width: 60%; }"<<endl;
  ret<<".headr { width: 39.5%; float: right; background-repeat: no-repeat; margin-top: 7px; ";
  ret<<"background-image: url(data:image/png;base64,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);";
  ret<<" width: 154px; height: 20px; }"<<endl;
  ret<<"a#appname { margin: 0; font-size: 27px; color: #666; text-decoration: none; font-weight: bold; display: block; }"<<endl;
  ret<<"footer { border-top:  1px solid #ddd; padding-top: 4px; font-size: 12px; }"<<endl;
  ret<<"footer.row { margin-top: 1em; margin-bottom: 1em; }"<<endl;
  ret<<".panel { background: #f2f2f2; border: 1px solid #e6e6e6; margin: 0 0 22px 0; padding: 20px; }"<<endl;
  ret<<"table.data { width: 100%; border-spacing: 0; border-top: 1px solid #333; }"<<endl;
  ret<<"table.data td { border-bottom: 1px solid #333; padding: 2px; }"<<endl;
  ret<<"table.data tr:nth-child(2n) { background: #e2e2e2; }"<<endl;
  ret<<"table.data tr:hover { background: white; }"<<endl;
  ret<<".ringmeta { margin-bottom: 5px; }"<<endl;
  ret<<".resetring {float: right; }"<<endl;
  ret<<".resetring i { background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAA/klEQVQY01XPP04UUBgE8N/33vd2XZUWEuzYuMZEG4KFCQn2NhA4AIewAOMBPIG2xhNYeAcKGqkNCdmYlVBZGBIT4FHsbuE0U8xk/kAbqm9TOfI/nicfhmwgDNhvylUT58kxCp4l31L8SfH9IetJ2ev6PwyIwyZWsdb11/gbTK55Co+r8rmJaRPTFJcpZil+pTit7C5awMpA+Zpi1sRFE9MqflYOloYCjY2uP8EdYiGU4CVGUBubxKfOOLjrtOBmzvEilbVb/aQWvhRl0unBZVXe4XdnK+bprwqnhoyTsyZ+JG8Wk0apfExxlcp7PFruXH8gdxamWB4cyW2sIO4BG3czIp78jUIAAAAASUVORK5CYII=); width: 10px; height: 10px; margin-right: 2px; display: inline-block; background-repeat: no-repeat; }"<<endl;
  ret<<".resetring:hover i { background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAA2ElEQVQY013PMUoDcRDF4c+kEzxCsNNCrBQvIGhnlcYm11EkBxAraw8gglgIoiJpAoKIYlBcgrgopsma3c3fwt1k9cHA480M8xvQp/nMjorOWY5ov7IAYlpjQk7aYxcuWBpwFQgJnUcaYk7GhEDIGL5w+MVpKLIRyR2b4JOjvGhUKzHTv2W7iuSN479Dvu9plf1awbQ6y3x1sU5tjpVJcMbakF6Ycoas8Dl5xEHJ160wRdfqzXfa6XQ4PLDlicWUjxHxZfndL/N+RhiwNzl/Q6PDhn/qsl76H7prcApk2B1aAAAAAElFTkSuQmCC);}"<<endl;
  ret<<".resizering {float: right;}"<<endl;
  resp->body = ret.str();
}

void AuthWebServer::webThread()
{
  try {
    if(::arg().mustDo("experimental-json-interface")) {
      d_ws->registerApiHandler("/servers/localhost/config", &apiServerConfig);
      d_ws->registerApiHandler("/servers/localhost/search-log", &apiServerSearchLog);
      d_ws->registerApiHandler("/servers/localhost/statistics", &apiServerStatistics);
      d_ws->registerApiHandler("/servers/localhost/zones/<id>/rrset", &apiServerZoneRRset);
      d_ws->registerApiHandler("/servers/localhost/zones/<id>", &apiServerZoneDetail);
      d_ws->registerApiHandler("/servers/localhost/zones", &apiServerZones);
      d_ws->registerApiHandler("/servers/localhost", &apiServerDetail);
      d_ws->registerApiHandler("/servers", &apiServer);
      // legacy dispatch
      d_ws->registerApiHandler("/jsonstat", boost::bind(&AuthWebServer::jsonstat, this, _1, _2));
    }
    d_ws->registerHandler("/style.css", boost::bind(&AuthWebServer::cssfunction, this, _1, _2));
    d_ws->registerHandler("/", boost::bind(&AuthWebServer::indexfunction, this, _1, _2));
    d_ws->go();
  }
  catch(...) {
    L<<Logger::Error<<"AuthWebServer thread caught an exception, dying"<<endl;
    exit(1);
  }
}