ws: clean up how we return errors as JSON

[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

    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(const string& method, const string& post, const map<string,string> &varmap, void *ptr, bool *custom)
{
  StatWebServer *sws=static_cast<StatWebServer *>(ptr);
  map<string,string>rvarmap=varmap;
  if(!rvarmap["resetring"].empty()){
    *custom=true;
    S.resetRing(rvarmap["resetring"]);
    return "HTTP/1.1 301 Moved Permanently\nLocation: /\nConnection: close\n\n";
  }
  if(!rvarmap["resizering"].empty()){
    *custom=true;
    S.resizeRing(rvarmap["resizering"], atoi(rvarmap["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)<<
    sws->d_queries.get1()<<", "<<
    sws->d_queries.get5()<<", "<<
    sws->d_queries.get10()<<". Max queries/second: "<<sws->d_queries.getMax()<<
    "<br>"<<endl;
  
  if(sws->d_cachemisses.get10()+sws->d_cachehits.get10()>0)
    ret<<"Cache hitrate, 1, 5, 10 minute averages: "<<
      makePercentage((sws->d_cachehits.get1()*100.0)/((sws->d_cachehits.get1())+(sws->d_cachemisses.get1())))<<", "<<
      makePercentage((sws->d_cachehits.get5()*100.0)/((sws->d_cachehits.get5())+(sws->d_cachemisses.get5())))<<", "<<
      makePercentage((sws->d_cachehits.get10()*100.0)/((sws->d_cachehits.get10())+(sws->d_cachemisses.get10())))<<
      "<br>"<<endl;

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

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

    sws->printvars(ret);
    if(arg().mustDo("webserver-print-arguments"))
      sws->printargs(ret);
  }
  else
    printtable(ret,rvarmap["ring"],S.getRingTitle(rvarmap["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 Exception("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, &di.backend))
      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 jsonDispatch(const string& method, const string& post, varmap_t& varmap, const string& command) {
  if(command=="get") {
    if(varmap.empty()) {
      vector<string> entries = S.getEntries();
      BOOST_FOREACH(string& ent, entries) {
        varmap[ent];
      }
      varmap["version"];
      varmap["uptime"];
    }

    string variable, value;
    
    Document doc;
    doc.SetObject();
    for(varmap_t::const_iterator iter = varmap.begin(); iter != varmap.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") {
    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);
  }
  else if(command == "flush-cache") {
    extern PacketCache PC;
    int number; 
    if(varmap["domain"].empty())
      number = PC.purge();
    else
      number = PC.purge(varmap["domain"]);
      
    map<string, string> object;
    object["number"]=lexical_cast<string>(number);
    //cerr<<"Flushed cache for '"<<varmap["domain"]<<"', cleaned "<<number<<" records"<<endl;
    return returnJSONObject(object);
  }
  else if(command == "pdns-control") {
    // TODO: turn this into a 405
    if(method!="POST")
      return returnJSONError("pdns-control requires a POST");
    // cout<<"post: "<<post<<endl;
    rapidjson::Document document;
    if(document.Parse<0>(post.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, varmap["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(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(method=="DELETE") {
      sd.db->replaceRRSet(sd.domain_id, qname, qtype, vector<DNSResourceRecord>());
      
    }
    else if(method=="POST") {
      rapidjson::Document document;
      if(document.Parse<0>(post.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 post;
    }  
  }
  else if(command == "zone") {
    string zonename = varmap["zone"];
    if (zonename.empty())
      return returnJSONError("Must give zone parameter");

    if(method == "GET") {
      // get current zone
      return getZone(zonename);
    } else if (method == "POST") {
      // create
      return createOrUpdateZone(zonename, true, varmap);
    } else if (method == "PUT") {
      // update or create
      return createOrUpdateZone(zonename, false, varmap);
    } else if (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 {
      // TODO: turn this into a 405
      return returnJSONError("Method not allowed");
    }
  }
  else if(command=="log-grep") {
    return makeLogGrepJSON(varmap, ::arg()["experimental-logfile"], " pdns[");
  }
  else if(command=="domains") {
    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);
  }

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

string StatWebServer::jsonstat(const string& method, const string& post, const map<string,string> &varmap, void *ptr, 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" ;

  varmap_t ourvarmap=varmap;
  string callback;
  string command;

  if(ourvarmap.count("callback")) {
    callback=ourvarmap["callback"];
    ourvarmap.erase("callback");
  }
  
  if(ourvarmap.count("command")) {
    command=ourvarmap["command"];
    ourvarmap.erase("command");
  }

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

  ret += jsonDispatch(method, post, ourvarmap, command);

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

string StatWebServer::cssfunction(const string& method, const string& post, const map<string,string> &varmap, void *ptr, 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,iVBORw0KGgoAAAANSUhEUgAAAJoAAAAUCAYAAAB1RSS/AAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAAACtgAAArYBAHIqtQAAABl0RVh0U29mdHdhcmUAd3d3Lmlua3NjYXBlLm9yZ5vuPBoAABBTSURBVGiBtVp7cFRVmv9u3763b7/f9It00iFACBohgCEyQYgKI49CLV3cWaoEZBcfo2shu7KOtZbjrqOuVQtVWFuOrPqPRU3NgOIDlkgyJEYJwUAqjzEJedFJupN0p9/v+9o/mtve7r790HF+VbeSPue7555zz+98z4ucOXNmgWVZBH4AK5PJGIPBQBqNxpTNZkthGMZCCUxMTBCDg4PyiYkJWTQaRc1mc7Kuri7a1NQU4ssxDAOffPKJAQCynvnII494ESTddO3aNaXT6SS4TplMRj/44IM+7ndXV5dqfn5ewh9306ZNQZqmobu7W11qri0tLX6tVkv19vYqpqampPw+BEFYtVpNGQwG0mKxpJYsWUIKjTE6OiodGBhQ8NcgkUgYjUZDORyOhM1mSxV6fjAYFF+6dEnLb9NoNOR9990X4H53dHSovV4vzpfZvn27T6FQ0Py2sbExorOzU+N2uwmWZUGv15N33nlnuLGxMZy7byyVQEJ//nd9Yuz/lJR/HBdrHSlJ9baIuuV1L4LJ8/Y49pc/KcJX39WRC4MEgskY3Lourmn5rQdbckfe2ijfOBZo+40xNXtNysR9KLZkdVK+9oBf0fBkCABA3NraamTZwjxSKpXUAw884G1paQkUIty5c+f0Fy5cWMIfx+l0Snt6ejTt7e26AwcOuKxWawoAQCQSQW9vr3pxcTHrJTY3Nwe5Tb18+bJ2bGxMzvWhKMpu27bNj6IoCwDQ1tamd7lcRM79genpaaK1tdVQcDG3sXbt2rBWq6X6+/sV3d3d2mKyy5cvj+7cudO7atWqGL99bGxMWuxZOp0utX37du+9994b5A4Qh2AwiObei6Ioe/fdd4eVSiUNAHD16lX1+Pi4nC+zadOmIJ9oZ8+eNeTu3/T0tLSvr0/V3d0dPXr0qJNrZ+KL6MKpjZWUbyxzQMmFIYJcGCISw5+qjE9+M4UqLJmx/RdeWBK+elKfGTjuR+OhWSxx86JS/9D/zsrufDzMdSXGv5J5/vBYBZuKiLi25HS3LDndLUuMX1IYHjvtynQUQjgcFp89e9b8zjvv2BmGyepjWRbeffdd2/nz55cUIqvT6ZSeOHHC7vf7xVyb3W6P58rNzc1liOfxeLJISNM04na7Me63z+fD+P1SqZQupHn+Wty8eVN+4sSJyv7+fnlp6R/g8/nw06dPW0+ePLmUJEmklDxN08iVK1dU5Y7f0dGhvnjxYkElQVFU1jP9Xz5j4pMsSzYwifvPPWnhfsdHPpdnkYwHlk4ivi9/baFDM2IAACYZEi1++qSVTzI+YkN/VEe++726JNE4TE1Nyc6cOWPkt3322Wf6/v7+ki8nEAhgH3zwQWYhDoejINGSyaQoFAphuf2zs7MSAIBIJIImEgmU32ez2RLlruOngGVZ+Oijj6w+n09cWjobg4ODyg8//NBSWhLgu+++K4toJEkin376qancObBkFIl/f7bo2ImxC0om5kUBACK9pzTFZJlEAI0O/kEJABAf+UJOh115+8VH5MZHGkGimc3mRK66BwBoa2szBAIBMUB6w1tbW415QgUwOjqqGB4elgIA1NTU5BGN02IulwsXOqUul0sCADA/P5+3qIqKip+NaARBMBiGMbnt0Wg0z68qF729vepr164pS8k5nU7ZwsJC0U0DAOjp6VHGYjE0t10kEgmqt5TrOwIYqqRWTbmuSQAASM9fiFKy5Fx/Wnaur7Ss53tC8IQ+/fTTM/F4HH3rrbcc/E1nWRYmJyeJtWvXRr7++mt1rnoGANi6devipk2bgsePH7dHIpGs8Ts7O7W1tbXxqqqqJIZhLN+keDweDADA7XbjuWPebpcAACwsLOT1V1VVFSSayWRKvvLKK5P8tmLBTVNTk//hhx/2vv/++5aBgYEsLeB0OqWF7gMAsFqtiYqKivj169c1ueaytbVVv2HDhnChewHS7/fKlSuqPXv2LBaTyw1gAABqa2sjhw4dck1PT0vOnz9v4O+NWFNdlluBqispAABUYSEp/6TgPmRkVba0rGppybFRpZksaDodDkeioqIiT/M4nU4JAMDIyEiez1JTUxN9/PHHFyoqKpJbtmzx5faPj4/LANKOr9VqzRqbi7D4vhof8/PzOMAPhMyZa948OSAIAjiOs/xLSFvzIZFImO3bt+fNn9OqhaDRaMiDBw/Obd26NY8oTqdTWmhtfPT29paMmkOhUJ6CkEgkjFKppOvq6mIvvviis76+PkNqVF1BiQ21yWJjoiobiRlWpQAACMeWaKk5EMu2RQEAiOr7YyBCi2YliMrN0aI+Wjwez+vn/KOZmZk8lbl69eoI97+QeQwEAhgXFFRVVWX1+/1+nGVZyE1bcPB6vRKWZSE35JdKpbTJZCp4qiiKQmZmZnDuEiKqEITWTtN0SfMDALBjx45FiUSSZ35HRkaKakQAgPn5ecnU1FRRQuv1+rz0Qn9/v+ry5ctqgPTh2rFjR9ZB0e78Hzcgedb2NhDQ7vq9C24fQNXm3/gww8qCxJTX/4OfcGyJAwBgS+pSqo3/XFADo0oLqdn2lkeQaAzDIB0dHWqPx5O3YK1WSzIMA7lmEQDAaDSSQv/zEQwGUQCA6urqLKJRFIV4PB6MH3GqVCqS3z83N4cvLi5mEaVUIOD1evHXX399GXedOnXKWkweIJ3r++abb/IcYqPRWDA3xodUKmWEyMCZ/1IolQvMfXcAabN7+vRp68cff2wS8nElVVvihl99cQtV27PmhapspOHvzzmJ5Tsy6RtELGGX7G+7JV2xIysHiqAYq/rFv3h0e96f57drHnjTo2n57TwiJrIOl6SyOWo6cPmWiNAwgj7am2++6Ugmk4IkrK2tjUWjUVRoMXK5PJOHkclkdJ4AAESjURQAYPny5YKRJ59odXV1EX6ea2ZmRpKbf/s5AwEAgO+//17+8ssv1/j9/jzNt3HjxmC542g0GjI318etXQgoirKcxrx+/brKYDAUJPW6desiFy5ciM/MzORpyM7OTl04HEYPHz7synURiJpfxizPj4+T8/0S0jOEiw2rUrh5TRJE+TRAFWba+KvPZung9Hxy9iohwpUMvnRjQkSo8zQ1ICJQbX7Zp2h8LpCa7ZEwUY8Yt21IiHXLMopCkEyFSFZZWRmz2+0FVSqXUL39v6AM5yTr9XpKrVZnab2RkRFZKpXKPHvlypUxvuM+PT0tCQaDWW+lWCDwUzA3N0cIkay2tjbS0tLiL3ccoYNWzPRWVVXFcBxnAACCwSAmRCIOCILA/v373QqFghLqv3Hjhrq9vb1gioIFBNLFoLI8gbKBILdHRNi8ocvOC6nVavLw4cOzAAAKhYJGEARytRo/5A6Hw4JMk8lkmRNht9vjAwMDmU0dGhril3TAbDanDAZD0u12EwAAw8PDCoZhspZQLBD4KRBa17Zt27wPPfSQVyQqO+0IQumHQloeIB0Jr169Onzjxg01QOHDzqGioiJ55MiRW8ePH68UCg6+/PJLY0tLS4Cv1RJjF2W+z5+2UEFnxiqgKhup2/muW7pyV1YAQEfmUN9n/2SOj57PRN4IirHKphe86q2vLSIozktHMBDq+p0u3PkfRpZKZOYtqWyOavd86BZrlxWOOjMTQVH2jjvuCL/wwgtOvV5PAaQ3QyqV5r20SCSSebmhUEiQaCqVKnNfLkk4QnEwmUyk2WzOaNDp6emsU14qEABIO87Hjh2b5K79+/e7i8kLVS0UCgXF19blINfEAwCoVCpBDcShsbExVKw/FzabLXXs2LFJIT81Go2K+YFPYqpDuvDx7ko+yQAA6NAs5jn9sD1+84KMa2OpJLLw0X2VfJIBALA0iYS6/svoO/ePWcni4KWXjKH2V0x8kgEAJG99Lfd8uLmSSfiFj+j999/v3bt3r/vgwYMzb7zxxthzzz03w9UqOVit1rzFjY6OZiY7NDSUl/4gCIIxmUyZcZYtW1ZQG0mlUloul9Nmszkjn1sCK6cigGEY63A4EtxlsViKOvQOhyOm0WiyyNve3q4vN+IESKeAhKJnISeej/r6+ijfzy2Evr4+Oad19Xo9dejQoVkhbev1ejNE83/xjAXYfPcqDRZ8nz9lhdtjhjr/U0d6RwoGLtH+j7WJyctSAADSM4SHu/9bsFwFAECHXVjwq381ChKtubk50NLSEmhsbAxrNBrBU7hixYq8XMvg4KByamqKmJubw7799ts8H6GqqirGV+XV1dWJQppCq9WSAABWq7WgT/hzBwIAaW3d0NCQpVkCgQDW1dVVVnnI5XLhp06dsuW24zjO1NTUFJ0viqJsfX19Sa3W09Ojfu+996xcCkapVNIoiuaxyGAwkAAAdHBaXIw4AGnNRnqHcQCAxOTlknXdxHirHAAgOXFJBkzxQ5ic6pD/6Nodh9uRT1YxPRaLoW+//XaVWCxmhXyMe+65J8D/jeM4a7FYEkKOL5ceWLp0aUGiVVZWliSax+PBX3rppRp+27PPPjtdLKhpamoKtre3Z53Sr776yrB58+a8LzH4GB4eVr722muCpaaGhoYgQRCFVEoGGzduDF65cqVkqevGjRvqgYEBld1uj8/NzUlIMtsNwnGc4VJMlH+yrNwhFbglxoyrUnTEXVKeDs2K039nSstG5rDyvdscLF26NNnQ0JAX7tM0jQiRzGQyJdevXx/Jba+srBQ0J3q9ngRIBwRisVhQ65UTCNA0jQQCAYx/CZXO+LDb7UmLxZJFYo/Hg1+9erVovTLXtHMgCILevXt30bISh5UrV8ZzTXchUBSFTExMyIQCj7q6ugh3KHDbugSIhN8hHxLb+iQAAGasK+2SmOvTsuY1pWWNqxI/mWgAAI8++uiCTqcrmcTEMIzZt2+fW8hMFvJbuNMoEokEM+FSqZQ2m81/k0+DAADWr1+fZ8IuXrxY8lu3XKAoyu7bt8/NmbFSEDLdPxYSiYTZu3dvJqmKYHJWturhomNKa34ZFskMNACAYt2hQDFZEaGh5XfsDQMAECt2R1Glreja5GsOBP4qoul0Ouro0aO3TCZTQTOkUqnII0eO3FqxYoUgoYRKVQAA/ISl0Ph/60+Dmpqa8syky+Ui+vr6yv4uTavVks8///ytUsV0oWf/GHk+pFIp/cQTT8zqdLos31q36+S8WFcjuE9iTVVK99CpTDQuXbk7qmz8taAGRlAJq9t50o2qllIAACKJitHu+cCF4ApBdS5d/XdB+fqnguLq6upobm4Kx/GyQ3m9Xk+9+uqrk21tbZquri6t1+vFWZYFi8WSdDgcsV27di1qtdqCYb3ZbCZra2sjueaW/yl0XV1dNBwOZ/mT/KIxB6VSSTkcjlhuey44X8lkMqVy5TmC6/V6qrGx0Z8bPY6OjsrWrFkT1el0ec9CUZRVqVSUWq2mqqur4xs2bAgL+XQSiYTJvZcf9Njt9uRdd90Vys2PcQnd5ubmAMMwcPPmTXk0GhUDpCsRVVVVsccee2yBS0PxIZLqacszfZPBP7+qj4+1Kilf+lNuYtkDEU3La3mfcmsfPL4gqfxFrJxPuYll22Kmp/omgpf+zZia7ZEyCT+KGVcn5WsP+uUNh0IAAP8PaQRnE4MgdzkAAAAASUVORK5CYII=);";
  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->setCaller(this);
    d_ws->registerHandler("",&indexfunction);
    d_ws->registerHandler("style.css",&cssfunction);
    if(::arg().mustDo("experimental-json-interface"))
      d_ws->registerHandler("jsonstat", &jsonstat);
    d_ws->go();
  }
  catch(...) {
    L<<Logger::Error<<"StatWebserver thread caught an exception, dying"<<endl;
    exit(1);
  }
}