added srv://

.clang-format

@@ -0,0 +1,4 @@
+BasedOnStyle: Google
+DerivePointerAlignment: false
+PointerAlignment: Left
+Standard: Cpp11

CHANGELOG

@@ -10,6 +10,9 @@ v2.8.5 (2016-03-XX)
 
 * improve nullptr handling in logger.
 
+* added new endpoint "srv://" for DNS service records
+
+
 v2.8.4 (2016-03-01)
 -------------------
 

Makefile.in

@@ -525,12 +525,12 @@ am__lib_libarango_a_SOURCES_DIST = lib/Basics/application-exit.cpp \
 	lib/Rest/EndpointList.cpp lib/Rest/Endpoint.cpp \
 	lib/Rest/EndpointIp.cpp lib/Rest/EndpointIpV4.cpp \
 	lib/Rest/EndpointIpV6.cpp lib/Rest/EndpointUnixDomain.cpp \
-	lib/Rest/HttpRequest.cpp lib/Rest/HttpResponse.cpp \
+	lib/Rest/EndpointSrv.cpp lib/Rest/HttpRequest.cpp \
-	lib/Rest/InitializeRest.cpp lib/Rest/SslInterface.cpp \
+	lib/Rest/HttpResponse.cpp lib/Rest/InitializeRest.cpp \
-	lib/Rest/Version.cpp lib/Utilities/DummyShell.cpp \
+	lib/Rest/SslInterface.cpp lib/Rest/Version.cpp \
-	lib/Utilities/LineEditor.cpp lib/Utilities/ScriptLoader.cpp \
+	lib/Utilities/DummyShell.cpp lib/Utilities/LineEditor.cpp \
-	lib/Utilities/ShellBase.cpp lib/Zip/ioapi.cpp \
+	lib/Utilities/ScriptLoader.cpp lib/Utilities/ShellBase.cpp \
-	lib/Zip/unzip.cpp lib/Zip/zip.cpp \
+	lib/Zip/ioapi.cpp lib/Zip/unzip.cpp lib/Zip/zip.cpp \
 	3rdParty/linenoise-ng/src/linenoise.cpp \
 	3rdParty/linenoise-ng/src/ConvertUTF.cpp \
 	3rdParty/linenoise-ng/src/wcwidth.cpp \
@@ -623,6 +623,7 @@ am_lib_libarango_a_OBJECTS =  \
 	lib/Rest/lib_libarango_a-EndpointIpV4.$(OBJEXT) \
 	lib/Rest/lib_libarango_a-EndpointIpV6.$(OBJEXT) \
 	lib/Rest/lib_libarango_a-EndpointUnixDomain.$(OBJEXT) \
+	lib/Rest/lib_libarango_a-EndpointSrv.$(OBJEXT) \
 	lib/Rest/lib_libarango_a-HttpRequest.$(OBJEXT) \
 	lib/Rest/lib_libarango_a-HttpResponse.$(OBJEXT) \
 	lib/Rest/lib_libarango_a-InitializeRest.$(OBJEXT) \
@@ -1363,12 +1364,13 @@ lib_libarango_a_SOURCES = lib/Basics/application-exit.cpp \
 	lib/Rest/EndpointList.cpp lib/Rest/Endpoint.cpp \
 	lib/Rest/EndpointIp.cpp lib/Rest/EndpointIpV4.cpp \
 	lib/Rest/EndpointIpV6.cpp lib/Rest/EndpointUnixDomain.cpp \
-	lib/Rest/HttpRequest.cpp lib/Rest/HttpResponse.cpp \
+	lib/Rest/EndpointSrv.cpp lib/Rest/HttpRequest.cpp \
-	lib/Rest/InitializeRest.cpp lib/Rest/SslInterface.cpp \
+	lib/Rest/HttpResponse.cpp lib/Rest/InitializeRest.cpp \
-	lib/Rest/Version.cpp lib/Utilities/DummyShell.cpp \
+	lib/Rest/SslInterface.cpp lib/Rest/Version.cpp \
-	lib/Utilities/LineEditor.cpp lib/Utilities/ScriptLoader.cpp \
+	lib/Utilities/DummyShell.cpp lib/Utilities/LineEditor.cpp \
-	lib/Utilities/ShellBase.cpp lib/Zip/ioapi.cpp \
+	lib/Utilities/ScriptLoader.cpp lib/Utilities/ShellBase.cpp \
-	lib/Zip/unzip.cpp lib/Zip/zip.cpp $(am__append_3) \
+	lib/Zip/ioapi.cpp lib/Zip/unzip.cpp lib/Zip/zip.cpp \
+	$(am__append_3) \
 	3rdParty/velocypack/src/AttributeTranslator.cpp \
 	3rdParty/velocypack/src/Builder.cpp \
 	3rdParty/velocypack/src/Collection.cpp \
@@ -3246,6 +3248,8 @@ lib/Rest/lib_libarango_a-EndpointIpV6.$(OBJEXT):  \
 	lib/Rest/$(am__dirstamp) lib/Rest/$(DEPDIR)/$(am__dirstamp)
 lib/Rest/lib_libarango_a-EndpointUnixDomain.$(OBJEXT):  \
 	lib/Rest/$(am__dirstamp) lib/Rest/$(DEPDIR)/$(am__dirstamp)
+lib/Rest/lib_libarango_a-EndpointSrv.$(OBJEXT):  \
+	lib/Rest/$(am__dirstamp) lib/Rest/$(DEPDIR)/$(am__dirstamp)
 lib/Rest/lib_libarango_a-HttpRequest.$(OBJEXT):  \
 	lib/Rest/$(am__dirstamp) lib/Rest/$(DEPDIR)/$(am__dirstamp)
 lib/Rest/lib_libarango_a-HttpResponse.$(OBJEXT):  \
@@ -4166,6 +4170,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@lib/Rest/$(DEPDIR)/lib_libarango_a-EndpointIpV4.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@lib/Rest/$(DEPDIR)/lib_libarango_a-EndpointIpV6.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@lib/Rest/$(DEPDIR)/lib_libarango_a-EndpointList.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@lib/Rest/$(DEPDIR)/lib_libarango_a-EndpointSrv.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@lib/Rest/$(DEPDIR)/lib_libarango_a-EndpointUnixDomain.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@lib/Rest/$(DEPDIR)/lib_libarango_a-HttpRequest.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@lib/Rest/$(DEPDIR)/lib_libarango_a-HttpResponse.Po@am__quote@
@@ -8258,6 +8263,20 @@ lib/Rest/lib_libarango_a-EndpointUnixDomain.obj: lib/Rest/EndpointUnixDomain.cpp
 @AMDEP_TRUE@@am__fastdepCXX_FALSE@	DEPDIR=$(DEPDIR) $(CXXDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCXX_FALSE@	$(AM_V_CXX@am__nodep@)$(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(lib_libarango_a_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -c -o lib/Rest/lib_libarango_a-EndpointUnixDomain.obj `if test -f 'lib/Rest/EndpointUnixDomain.cpp'; then $(CYGPATH_W) 'lib/Rest/EndpointUnixDomain.cpp'; else $(CYGPATH_W) '$(srcdir)/lib/Rest/EndpointUnixDomain.cpp'; fi`
 
+lib/Rest/lib_libarango_a-EndpointSrv.o: lib/Rest/EndpointSrv.cpp
+@am__fastdepCXX_TRUE@	$(AM_V_CXX)$(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(lib_libarango_a_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -MT lib/Rest/lib_libarango_a-EndpointSrv.o -MD -MP -MF lib/Rest/$(DEPDIR)/lib_libarango_a-EndpointSrv.Tpo -c -o lib/Rest/lib_libarango_a-EndpointSrv.o `test -f 'lib/Rest/EndpointSrv.cpp' || echo '$(srcdir)/'`lib/Rest/EndpointSrv.cpp
+@am__fastdepCXX_TRUE@	$(AM_V_at)$(am__mv) lib/Rest/$(DEPDIR)/lib_libarango_a-EndpointSrv.Tpo lib/Rest/$(DEPDIR)/lib_libarango_a-EndpointSrv.Po
+@AMDEP_TRUE@@am__fastdepCXX_FALSE@	$(AM_V_CXX)source='lib/Rest/EndpointSrv.cpp' object='lib/Rest/lib_libarango_a-EndpointSrv.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCXX_FALSE@	DEPDIR=$(DEPDIR) $(CXXDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCXX_FALSE@	$(AM_V_CXX@am__nodep@)$(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(lib_libarango_a_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -c -o lib/Rest/lib_libarango_a-EndpointSrv.o `test -f 'lib/Rest/EndpointSrv.cpp' || echo '$(srcdir)/'`lib/Rest/EndpointSrv.cpp
+
+lib/Rest/lib_libarango_a-EndpointSrv.obj: lib/Rest/EndpointSrv.cpp
+@am__fastdepCXX_TRUE@	$(AM_V_CXX)$(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(lib_libarango_a_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -MT lib/Rest/lib_libarango_a-EndpointSrv.obj -MD -MP -MF lib/Rest/$(DEPDIR)/lib_libarango_a-EndpointSrv.Tpo -c -o lib/Rest/lib_libarango_a-EndpointSrv.obj `if test -f 'lib/Rest/EndpointSrv.cpp'; then $(CYGPATH_W) 'lib/Rest/EndpointSrv.cpp'; else $(CYGPATH_W) '$(srcdir)/lib/Rest/EndpointSrv.cpp'; fi`
+@am__fastdepCXX_TRUE@	$(AM_V_at)$(am__mv) lib/Rest/$(DEPDIR)/lib_libarango_a-EndpointSrv.Tpo lib/Rest/$(DEPDIR)/lib_libarango_a-EndpointSrv.Po
+@AMDEP_TRUE@@am__fastdepCXX_FALSE@	$(AM_V_CXX)source='lib/Rest/EndpointSrv.cpp' object='lib/Rest/lib_libarango_a-EndpointSrv.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCXX_FALSE@	DEPDIR=$(DEPDIR) $(CXXDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCXX_FALSE@	$(AM_V_CXX@am__nodep@)$(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(lib_libarango_a_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -c -o lib/Rest/lib_libarango_a-EndpointSrv.obj `if test -f 'lib/Rest/EndpointSrv.cpp'; then $(CYGPATH_W) 'lib/Rest/EndpointSrv.cpp'; else $(CYGPATH_W) '$(srcdir)/lib/Rest/EndpointSrv.cpp'; fi`
+
 lib/Rest/lib_libarango_a-HttpRequest.o: lib/Rest/HttpRequest.cpp
 @am__fastdepCXX_TRUE@	$(AM_V_CXX)$(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(lib_libarango_a_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -MT lib/Rest/lib_libarango_a-HttpRequest.o -MD -MP -MF lib/Rest/$(DEPDIR)/lib_libarango_a-HttpRequest.Tpo -c -o lib/Rest/lib_libarango_a-HttpRequest.o `test -f 'lib/Rest/HttpRequest.cpp' || echo '$(srcdir)/'`lib/Rest/HttpRequest.cpp
 @am__fastdepCXX_TRUE@	$(AM_V_at)$(am__mv) lib/Rest/$(DEPDIR)/lib_libarango_a-HttpRequest.Tpo lib/Rest/$(DEPDIR)/lib_libarango_a-HttpRequest.Po

lib/CMakeLists.txt

@@ -139,6 +139,7 @@ add_library(
     Rest/EndpointIp.cpp
     Rest/EndpointIpV4.cpp
     Rest/EndpointIpV6.cpp
+    Rest/EndpointSrv.cpp
     Rest/HttpRequest.cpp
     Rest/HttpResponse.cpp
     Rest/InitializeRest.cpp

lib/Makefile.files

@@ -80,6 +80,7 @@ lib_libarango_a_SOURCES = \
 	lib/Rest/EndpointIpV4.cpp \
 	lib/Rest/EndpointIpV6.cpp \
 	lib/Rest/EndpointUnixDomain.cpp \
+	lib/Rest/EndpointSrv.cpp \
 	lib/Rest/HttpRequest.cpp \
 	lib/Rest/HttpResponse.cpp \
 	lib/Rest/InitializeRest.cpp \

lib/Rest/Endpoint.cpp

@@ -39,6 +39,7 @@
 #endif
 #include "Rest/EndpointIpV4.h"
 #include "Rest/EndpointIpV6.h"
+#include "Rest/EndpointSrv.h"
 
 using namespace std;
 using namespace triagens::basics;
@@ -116,25 +117,19 @@ std::string Endpoint::getUnifiedForm (const std::string& specification) {
     return "";
   }
 #endif
+  else if (StringUtils::isPrefix(copy, "srv://")) {
+    return copy;
+  }
   else if (! StringUtils::isPrefix(copy, "ssl://") &&
            ! StringUtils::isPrefix(copy, "tcp://")) {
     // invalid type
     return "";
   }
 
-  size_t found;
-  /*
-  // turn "localhost" into "127.0.0.1"
-  // technically this is not always correct, but circumvents obvious problems
-  // when the configuration contains both "127.0.0.1" and "localhost" endpoints
-  found = copy.find("localhost");
-  if (found != string::npos && found >= 6 && found < 10) {
-    copy = copy.replace(found, strlen("localhost"), "127.0.0.1");
-  }
-  */
-
   // tcp/ip or ssl
+  size_t found;
   string temp = copy.substr(6, copy.length()); // strip tcp:// or ssl://
+
   if (temp[0] == '[') {
     // ipv6
     found = temp.find("]:", 1);
@@ -144,6 +139,7 @@ std::string Endpoint::getUnifiedForm (const std::string& specification) {
     }
 
     found = temp.find("]", 1);
+
     if (found != string::npos && found > 2 && found + 1 == temp.size()) {
       // hostname only (e.g. [address])
       return copy + ":" + StringUtils::itoa(EndpointIp::_defaultPort);
@@ -227,7 +223,6 @@ Endpoint* Endpoint::factory (const Endpoint::EndpointType type,
   EncryptionType encryption = ENCRYPTION_NONE;
   string domainType = StringUtils::tolower(copy.substr(0, 7));
 
-
   if (StringUtils::isPrefix(domainType, "ssl://")) {
     // ssl
     encryption = ENCRYPTION_SSL;
@@ -246,6 +241,14 @@ Endpoint* Endpoint::factory (const Endpoint::EndpointType type,
   }
 #endif
 
+  else if (StringUtils::isPrefix(domainType, "srv://")) {
+    if (type != ENDPOINT_CLIENT) {
+      return nullptr;
+    }
+    
+    return new EndpointSrv(specification.substr(6));
+  }
+
   else if (! StringUtils::isPrefix(domainType, "tcp://")) {
     // invalid type
     return nullptr;

lib/Rest/Endpoint.h

@@ -88,7 +88,8 @@ namespace triagens {
           DOMAIN_UNKNOWN = 0,
           DOMAIN_UNIX,
           DOMAIN_IPV4,
-          DOMAIN_IPV6
+          DOMAIN_IPV6,
+          DOMAIN_SRV
         };
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -205,7 +206,7 @@ namespace triagens {
 /// @brief return whether the endpoint is connected
 ////////////////////////////////////////////////////////////////////////////////
 
-        bool isConnected () const {
+        virtual bool isConnected () const {
           return _connected;
         }
 
@@ -221,7 +222,7 @@ namespace triagens {
 /// @brief get the domain type of an endpoint
 ////////////////////////////////////////////////////////////////////////////////
 
-        DomainType getDomainType () const {
+        virtual DomainType getDomainType () const {
           return _domainType;
         }
 

lib/Rest/EndpointIp.cpp

@@ -126,6 +126,7 @@ TRI_socket_t EndpointIp::connectSocket (const struct addrinfo* aip,
 #ifdef _WIN32
   char windowsErrorBuf[256];
 #endif
+
   // set address and port
   char host[NI_MAXHOST];
   char serv[NI_MAXSERV];

lib/Rest/EndpointSrv.cpp

@@ -0,0 +1,257 @@
+////////////////////////////////////////////////////////////////////////////////
+/// DISCLAIMER
+///
+/// Copyright 2016 ArangoDB GmbH, Cologne, Germany
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     http://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+///
+/// Copyright holder is ArangoDB GmbH, Cologne, Germany
+///
+/// @author Dr. Frank Celler
+/// @author Copyright 2016, ArangoDB GmbH, Cologne, Germany
+////////////////////////////////////////////////////////////////////////////////
+
+#include "EndpointSrv.h"
+
+#ifndef _WIN32
+
+#define BIND_4_COMPAT 1  // LINUX
+#define BIND_8_COMPAT 1  // MACOSX
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+
+#include "Basics/logging.h"
+#include "Rest/EndpointIp.h"
+
+using namespace triagens::basics;
+using namespace triagens::rest;
+
+#if PACKETSZ > 1024
+#define MAXPACKET PACKETSZ
+#else
+#define MAXPACKET 1024
+#endif
+
+union QueryBuffer {
+  ::HEADER header;
+  unsigned char buffer[MAXPACKET];
+};
+
+struct SrvRecord {
+  int priority;
+  int weight;
+  int port;
+  std::string name;
+};
+
+std::vector<SrvRecord> srvRecords(std::string specification) {
+  res_init();
+
+  char const* dname = specification.c_str();
+  int nclass = ns_c_in;
+  int type = ns_t_srv;
+
+  QueryBuffer answer;
+  int anslen = sizeof(answer);
+
+  int n = res_search(dname, nclass, type, answer.buffer, anslen);
+
+  std::vector<SrvRecord> services;
+
+  if (n != -1) {
+    HEADER* hp = &answer.header;
+
+    int qdcount = ntohs(hp->qdcount);
+    int ancount = ntohs(hp->ancount);
+
+    unsigned char* msg = answer.buffer;
+    unsigned char* eom = msg + n;
+    unsigned char* cp = msg + sizeof(HEADER);
+
+    unsigned char hostbuf[256];
+
+    while (0 < qdcount-- && cp < eom) {
+      n = dn_expand(msg, eom, cp, (char*)hostbuf, 256);
+
+      if (n < 0) {
+        LOG_WARNING("DNS record for '%s' is corrupt", specification.c_str());
+        return {};
+      }
+
+      cp += n + QFIXEDSZ;
+    }
+
+    // loop through the answer buffer and extract SRV records
+    while (0 < ancount-- && cp < eom) {
+      n = dn_expand(msg, eom, cp, (char*)hostbuf, 256);
+
+      if (n < 0) {
+        LOG_WARNING("DNS record for '%s' is corrupt", specification.c_str());
+        return {};
+      }
+
+      cp += n;
+
+      int type = _getshort(cp);
+      cp += 2;
+
+      int nclass = _getshort(cp);
+      cp += 2;
+
+      int ttl = _getlong(cp);
+      cp += 4;
+
+      int dlen = _getshort(cp);
+      cp += 2;
+
+      int priority = _getshort(cp);
+      cp += 2;
+
+      int weight = _getshort(cp);
+      cp += 2;
+
+      int port = _getshort(cp);
+      cp += 2;
+
+      n = dn_expand(msg, eom, cp, (char*)hostbuf, 256);
+
+      if (n < 0) {
+        LOG_WARNING("DNS record for '%s' is corrupt", specification.c_str());
+        break;
+      }
+
+      cp += n;
+
+      LOG_TRACE("DNS record for '%s': type %d, class %d, ttl %d, len %d, prio %d, "
+                " weight %d, port %d, host '%s'", specification.c_str(),
+                type, nclass, ttl, dlen, priority, weight, port, hostbuf);
+
+      if (type != T_SRV) {
+        continue;
+      }
+
+      SrvRecord srv;
+
+      srv.weight = weight;
+      srv.priority = priority;
+      srv.port = port;
+      srv.name = (char*)hostbuf;
+
+      services.push_back(srv);
+    }
+  } else {
+    LOG_WARNING("DNS record for '%s' not found", specification.c_str());
+  }
+
+  std::sort(services.begin(), services.end(),
+            [](SrvRecord const& lhs, SrvRecord const& rhs) {
+              if (lhs.priority != rhs.priority) {
+                return lhs.priority < rhs.priority;
+              }
+
+              return lhs.weight > rhs.weight;
+            });
+
+  return services;
+}
+
+#else
+
+std::vector<SrvRecord> srvRecords(std::string specification) {
+  return {};
+}
+
+#endif
+
+EndpointSrv::EndpointSrv(std::string const& specification)
+    : Endpoint(ENDPOINT_CLIENT, DOMAIN_SRV, ENCRYPTION_NONE, specification, 0) {
+  LOG_ERROR("%s", specification.c_str());
+}
+
+EndpointSrv::~EndpointSrv() {}
+
+bool EndpointSrv::isConnected() const {
+  if (_endpoint != nullptr) {
+    return _endpoint->isConnected();
+  }
+  
+  return false;
+}
+
+TRI_socket_t EndpointSrv::connect(double connectTimeout,
+                                  double requestTimeout) {
+  LOG_ERROR("connecting to ip endpoint '%s'", _specification.c_str());
+
+  auto services = srvRecords(_specification);
+
+  TRI_socket_t res;
+
+  for (auto service : services) {
+    std::string spec =
+        "tcp://" + service.name + ":" + StringUtils::itoa(service.port);
+
+    _endpoint.reset(Endpoint::clientFactory(spec));
+
+    res = _endpoint->connect(connectTimeout, requestTimeout);
+
+    if (_endpoint->isConnected()) {
+      return res;
+    }
+  }
+
+  TRI_invalidatesocket(&res);
+  return res;
+}
+
+void EndpointSrv::disconnect() {
+  if (_endpoint != nullptr) {
+    _endpoint->disconnect();
+  }
+}
+
+bool EndpointSrv::initIncoming(TRI_socket_t) { return false; }
+
+int EndpointSrv::getDomain() const {
+  if (_endpoint != nullptr) {
+    return _endpoint->getDomain();
+  }
+
+  return -1;
+}
+
+int EndpointSrv::getPort() const {
+  if (_endpoint != nullptr) {
+    return _endpoint->getPort();
+  }
+
+  return -1;
+}
+
+std::string EndpointSrv::getHost() const {
+  if (_endpoint != nullptr) {
+    return _endpoint->getHost();
+  }
+
+  return "";
+}
+
+std::string EndpointSrv::getHostString() const {
+  if (_endpoint != nullptr) {
+    return _endpoint->getHostString();
+  }
+
+  return "";
+}

lib/Rest/EndpointSrv.h

@@ -0,0 +1,53 @@
+////////////////////////////////////////////////////////////////////////////////
+/// DISCLAIMER
+///
+/// Copyright 2016 ArangoDB GmbH, Cologne, Germany
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     http://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+///
+/// Copyright holder is ArangoDB GmbH, Cologne, Germany
+///
+/// @author Dr. Frank Celler
+/// @author Copyright 2016, ArangoDB GmbH, Cologne, Germany
+////////////////////////////////////////////////////////////////////////////////
+
+#ifndef ARANGODB_REST_ENDPOINT_SRV_H
+#define ARANGODB_REST_ENDPOINT_SRV_H 1
+
+#include "Rest/Endpoint.h"
+
+namespace triagens {
+namespace rest {
+class EndpointSrv final : public Endpoint {
+ public:
+  explicit EndpointSrv(std::string const&);
+
+  ~EndpointSrv();
+
+ public:
+  bool isConnected() const override;
+  TRI_socket_t connect(double, double) override;
+  void disconnect() override;
+  bool initIncoming(TRI_socket_t) override;
+  int getDomain() const override;
+  int getPort() const override;
+  std::string getHost() const override;
+  std::string getHostString() const override;
+
+ private:
+  std::unique_ptr<Endpoint> _endpoint;
+};
+}
+}
+
+#endif