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

/*
    Copyright (C) 2002 - 2012  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.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 "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 "version.hh"
#include "session.hh"

using namespace rapidjson;

extern StatBag S;

typedef map<string,string> varmap_t;

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

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


void *StatWebServer::threadHelper(void *p)
{
  StatWebServer *sws=static_cast<StatWebServer *>(p);
  sws->launch();
  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>"<< StatWebServer::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>"<< StatWebServer::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 StatWebServer::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 StatWebServer::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 StatWebServer::makePercentage(const double& val)
{
  return (boost::format("%.01f%%") % val).str();
}

string StatWebServer::indexfunction(HttpRequest* req, bool *custom)
{
  if(!req->queryArgs["resetring"].empty()){
    *custom=true;
    S.resetRing(req->queryArgs["resetring"]);
    return "HTTP/1.1 301 Moved Permanently\nLocation: /\nConnection: close\n\n";
  }
  if(!req->queryArgs["resizering"].empty()){
    *custom=true;
    S.resizeRing(req->queryArgs["resizering"], atoi(req->queryArgs["size"].c_str()));
    return "HTTP/1.1 301 Moved Permanently\nLocation: /\nConnection: close\n\n";
  }

  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->queryArgs["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->queryArgs["ring"],S.getRingTitle(req->queryArgs["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;

  return ret.str();
}

static int intFromJson(const Value& val) {
  if (val.IsInt()) {
    return val.GetInt();
  } else if (val.IsString()) {
    return atoi(val.GetString());
  } else {
    throw PDNSException("Value not an Integer");
  }
}

static string getZone(const string& zonename) {
  UeberBackend B;
  DomainInfo di;
  if(!B.getDomainInfo(zonename, di))
    return returnJSONError("Could not find domain '"+zonename+"'");

  Document doc;
  doc.SetObject();

  Value root;
  root.SetObject();
  root.AddMember("name", zonename.c_str(), doc.GetAllocator());
  root.AddMember("type", "Zone", doc.GetAllocator());
  root.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());
  }
  root.AddMember("masters", masters, doc.GetAllocator());
  root.AddMember("serial", di.serial, doc.GetAllocator());
  root.AddMember("notified_serial", di.notified_serial, doc.GetAllocator());
  root.AddMember("last_check", (unsigned int) di.last_check, doc.GetAllocator());

  DNSResourceRecord rr;
  Value records;
  records.SetArray();
  di.backend->list(zonename, di.id);
  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());
    Value jcontent(rr.content.c_str(), doc.GetAllocator()); // copy
    object.AddMember("content", jcontent, doc.GetAllocator());
    records.PushBack(object, doc.GetAllocator());
  }
  root.AddMember("records", records, doc.GetAllocator());

  doc.AddMember("zone", root, doc.GetAllocator());
  return makeStringFromDocument(doc);
}

static string createOrUpdateZone(const string& zonename, bool onlyCreate, varmap_t& varmap) {
  UeberBackend B;
  DomainInfo di;

  bool exists = B.getDomainInfo(zonename, di);
  if(exists && onlyCreate)
    return returnJSONError("Domain '"+zonename+"' already exists");

  if(!exists) {
    if(!B.createDomain(zonename))
      return returnJSONError("Creating domain '"+zonename+"' failed");

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

    // create SOA record so zone "really" exists
    DNSResourceRecord soa;
    soa.qname = zonename;
    soa.content = "1";
    soa.qtype = "SOA";
    soa.domain_id = di.id;
    soa.auth = 0;
    soa.ttl = ::arg().asNum( "default-ttl" );
    soa.priority = 0;

    di.backend->startTransaction(zonename, di.id);
    di.backend->feedRecord(soa);
    di.backend->commitTransaction();
  }

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

  return getZone(zonename);
}

static string apiServerConfig(HttpRequest* req) {
  if(req->method != "GET")
    throw HttpMethodNotAllowedException();

  vector<string> items = ::arg().list();
  Document doc;
  doc.SetArray();
  BOOST_FOREACH(const string& var, items) {
    Value kv, key, value;
    kv.SetArray();
    key.SetString(var.c_str(), var.length());
    kv.PushBack(key, doc.GetAllocator());

    if(var.find("password") != string::npos)
      value="*****";
    else
      value.SetString(::arg()[var].c_str(), ::arg()[var].length(), doc.GetAllocator());

    kv.PushBack(value, doc.GetAllocator());
    doc.PushBack(kv, doc.GetAllocator());
  }
  return makeStringFromDocument(doc);
}

static string apiServerSearchLog(HttpRequest* req) {
  if(req->method != "GET")
    throw HttpMethodNotAllowedException();

  return makeLogGrepJSON(req->queryArgs["q"], ::arg()["experimental-logfile"], " pdns[");
}

static string apiServerZones(HttpRequest* req) {
  if(req->method != "GET")
    throw HttpMethodNotAllowedException();

  UeberBackend B;
  vector<DomainInfo> domains;
  B.getAllDomains(&domains);

  Document doc;
  doc.SetObject();

  Value jdomains;
  jdomains.SetArray();

  BOOST_FOREACH(const DomainInfo& di, domains) {
    Value jdi;
    jdi.SetObject();
    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());
    jdomains.PushBack(jdi, doc.GetAllocator());
  }
  doc.AddMember("domains", jdomains, doc.GetAllocator());
  return makeStringFromDocument(doc);
}

static string jsonDispatch(HttpRequest* req, const string& command) {
  if(command=="get") {
    if(req->queryArgs.empty()) {
      vector<string> entries = S.getEntries();
      BOOST_FOREACH(string& ent, entries) {
        req->queryArgs[ent];
      }
      req->queryArgs["version"];
      req->queryArgs["uptime"];
    }

    string variable, value;
    
    Document doc;
    doc.SetObject();
    for(varmap_t::const_iterator iter = req->queryArgs.begin(); iter != req->queryArgs.end() ; ++iter) {
      variable = iter->first;
      if(variable == "version") {
        value = VERSION;
      }
      else if(variable == "uptime") {
        value = lexical_cast<string>(time(0) - s_starttime);
      }
      else 
        value = lexical_cast<string>(S.read(variable));
      Value jval;
      jval.SetString(value.c_str(), value.length(), doc.GetAllocator());
      doc.AddMember(variable.c_str(), jval, doc.GetAllocator());
    }
    return makeStringFromDocument(doc);
  }
  else if(command=="config") {
    return apiServerConfig(req);
  }
  else if(command == "flush-cache") {
    extern PacketCache PC;
    int number; 
    if(req->queryArgs["domain"].empty())
      number = PC.purge();
    else
      number = PC.purge(req->queryArgs["domain"]);
      
    map<string, string> object;
    object["number"]=lexical_cast<string>(number);
    //cerr<<"Flushed cache for '"<<queryArgs["domain"]<<"', cleaned "<<number<<" records"<<endl;
    return returnJSONObject(object);
  }
  else if(command == "pdns-control") {
    if(req->method!="POST")
      throw HttpMethodNotAllowedException();
    // cout<<"post: "<<post<<endl;
    rapidjson::Document document;
    if(document.Parse<0>(req->body.c_str()).HasParseError())
      return returnJSONError("Unable to parse JSON");
    // 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 {
      m["error"]="No such function "+toUpper(parameters[0]);
    }
    return returnJSONObject(m);
  }
  else if(command == "zone-rest") { // http://jsonstat?command=zone-rest&rest=/powerdns.nl/www.powerdns.nl/a
    vector<string> parts;
    stringtok(parts, req->queryArgs["rest"], "/");
    if(parts.size() != 3) 
      return returnJSONError("Could not parse rest parameter");
    UeberBackend B;
    SOAData sd;
    sd.db = (DNSBackend*)-1;
    if(!B.getSOA(parts[0], sd) || !sd.db)
      return returnJSONError("Could not find domain '"+parts[0]+"'");
    
    QType qtype;
    qtype=parts[2];
    string qname=parts[1];
    extern PacketCache PC;
    PC.purge(qname);
    // cerr<<"domain id: "<<sd.domain_id<<", lookup name: '"<<parts[1]<<"', for type: '"<<qtype.getName()<<"'"<<endl;
    
    if(req->method == "GET") {
      B.lookup(qtype, parts[1], 0, sd.domain_id);
      
      DNSResourceRecord rr;
      string ret = "{ \"records\": [";
      map<string, string> object;
      bool first=1;
      
      while(B.get(rr)) {
        if(!first) ret += ", ";
          first=false;
        object.clear();
        object["name"] = rr.qname;
        object["type"] = rr.qtype.getName();
        object["ttl"] = lexical_cast<string>(rr.ttl);
        object["priority"] = lexical_cast<string>(rr.priority);
        object["content"] = rr.content;
        ret+=returnJSONObject(object);
      }
      ret+="]}";
      return ret;
    }
    else if(req->method=="DELETE") {
      sd.db->replaceRRSet(sd.domain_id, qname, qtype, vector<DNSResourceRecord>());
      
    }
    else if(req->method=="POST") {
      rapidjson::Document document;
      if(document.Parse<0>(req->body.c_str()).HasParseError())
        return returnJSONError("Unable to parse JSON");
      
      DNSResourceRecord rr;
      vector<DNSResourceRecord> rrset;
      const rapidjson::Value &records= document["records"];
      for(rapidjson::SizeType i = 0; i < records.Size(); ++i) {
        const rapidjson::Value& record = records[i];
        rr.qname=record["name"].GetString();
        rr.content=record["content"].GetString();
        rr.qtype=record["type"].GetString();
        rr.domain_id = sd.domain_id;
        rr.auth=0;
        rr.ttl=intFromJson(record["ttl"]);
        rr.priority=intFromJson(record["priority"]);
        
        rrset.push_back(rr);
        
        if(rr.qtype.getCode() == QType::MX || rr.qtype.getCode() == QType::SRV) 
          rr.content = lexical_cast<string>(rr.priority)+" "+rr.content;
          
        try {
          shared_ptr<DNSRecordContent> drc(DNSRecordContent::mastermake(rr.qtype.getCode(), 1, rr.content));
          string tmp=drc->serialize(rr.qname);
        }
        catch(std::exception& e) 
        {
          return returnJSONError("Following record had a problem: "+rr.qname+" IN " +rr.qtype.getName()+ " " + rr.content+": "+e.what());
        }
      }
      // but now what
      sd.db->startTransaction(qname);
      sd.db->replaceRRSet(sd.domain_id, qname, qtype, rrset);
      sd.db->commitTransaction();
      return req->body;
    }  
  }
  else if(command == "zone") {
    string zonename = req->queryArgs["zone"];
    if (zonename.empty())
      return returnJSONError("Must give zone parameter");

    if(req->method == "GET") {
      // get current zone
      return getZone(zonename);
    } else if (req->method == "POST") {
      // create
      return createOrUpdateZone(zonename, true, req->queryArgs);
    } else if (req->method == "PUT") {
      // update or create
      return createOrUpdateZone(zonename, false, req->queryArgs);
    } else if (req->method == "DELETE") {
      // delete
      UeberBackend B;
      DomainInfo di;
      if(!B.getDomainInfo(zonename, di))
        return returnJSONError("Deleting domain '"+zonename+"' failed: domain does not exist");
      if(!di.backend->deleteDomain(zonename))
        return returnJSONError("Deleting domain '"+zonename+"' failed: backend delete failed/unsupported");
      map<string, string> success; // empty success object
      return returnJSONObject(success);
    } else {
      throw HttpMethodNotAllowedException();
    }
  }
  else if(command=="log-grep") {
    return makeLogGrepJSON(req->queryArgs["needle"], ::arg()["experimental-logfile"], " pdns[");
  }
  else if(command=="domains") {
    return apiServerZones(req);
  }

  return returnJSONError("No or unknown command given");
}

static string apiWrapper(boost::function<string(HttpRequest*)> handler, HttpRequest* req, bool *custom) {
  *custom=1; // indicates we build the response
  string ret="HTTP/1.1 200 OK\r\n"
  "Server: PowerDNS/"VERSION"\r\n"
  "Connection: close\r\n"
  "Access-Control-Allow-Origin: *\r\n"
  "Content-Type: application/json\r\n"
  "\r\n" ;

  string callback;

  if(req->queryArgs.count("callback")) {
    callback=req->queryArgs["callback"];
    req->queryArgs.erase("callback");
  }
  
  req->queryArgs.erase("_"); // jQuery cache buster

  if(!callback.empty())
      ret += callback+"(";

  ret += handler(req);

  if(!callback.empty()) {
    ret += ");";
  }
  return ret;
}

void StatWebServer::registerApiHandler(const string& url, boost::function<string(HttpRequest*)> handler) {
  WebServer::HandlerFunction f = boost::bind(&apiWrapper, handler, _1, _2);
  d_ws->registerHandler(url, f);
}

string StatWebServer::jsonstat(HttpRequest* req)
{
  string command;

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

  return jsonDispatch(req, command);
}

string StatWebServer::cssfunction(HttpRequest* req, bool *custom)
{
  *custom=1; // indicates we build the response
  ostringstream ret;
  ret<<"HTTP/1.1 200 OK\r\n"
  "Server: PowerDNS/"VERSION"\r\n"
  "Connection: close\r\n"
  "Cache-Control: max-age=86400\r\n"
  "Content-Type: text/css\r\n"
  "\r\n";

  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;
  return ret.str();
}

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