--- a/Resources/Orthanc/CMake/DownloadOrthancFramework.cmake	Tue Apr 07 13:02:17 2026 +0200
+++ b/Resources/Orthanc/CMake/DownloadOrthancFramework.cmake	Tue Apr 07 13:03:02 2026 +0200
@@ -231,6 +231,11 @@
         # for BlockingSharedMessageQueue.WaitEmpty()
         set(ORTHANC_FRAMEWORK_PRE_RELEASE ON)
         set(ORTHANC_FRAMEWORK_MD5 "c037cd2ddbe1b65b431692855483161b")
+      elseif (ORTHANC_FRAMEWORK_VERSION STREQUAL "56eb61c86f93")
+        # OE2 1.11.0 (framework post-1.12.10)
+        # for HttpClient that returns the answer body in case of HTTP error
+        set(ORTHANC_FRAMEWORK_PRE_RELEASE ON)
+        set(ORTHANC_FRAMEWORK_MD5 "665f8aa70d7c5091bc20da37cf664910")
       endif()
     endif()
   endif()

--- a/Resources/Orthanc/Plugins/OrthancPluginCppWrapper.cpp	Tue Apr 07 13:02:17 2026 +0200
+++ b/Resources/Orthanc/Plugins/OrthancPluginCppWrapper.cpp	Tue Apr 07 13:03:02 2026 +0200
@@ -1544,11 +1544,25 @@
 
 #endif /* HAS_ORTHANC_PLUGIN_FIND_MATCHER == 1 */
 
+  static void CheckAnswerSizeIsLessThan4GB(const std::string& answer)
+  {
+    if (answer.size() > static_cast<size_t>(std::numeric_limits<uint32_t>::max()))
+    {
+  #if HAS_ORTHANC_EXCEPTION == 1
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange, "Cannot send HTTP response larger than 4GB");
+  #else
+      ORTHANC_PLUGINS_LOG_ERROR("Cannot send HTTP response larger than 4GB");
+      ORTHANC_PLUGINS_THROW_PLUGIN_ERROR_CODE(OrthancPluginErrorCode_ParameterOutOfRange);          
+  #endif
+    }
+  }
+
   void AnswerJson(const Json::Value& value,
                   OrthancPluginRestOutput* output)
   {
     std::string bodyString;
-    WriteStyledJson(bodyString, value);    
+    WriteStyledJson(bodyString, value);
+    CheckAnswerSizeIsLessThan4GB(bodyString);    
     OrthancPluginAnswerBuffer(GetGlobalContext(), output, bodyString.c_str(), bodyString.size(), "application/json");
   }
 
@@ -1556,6 +1570,7 @@
                     const char* mimeType,
                     OrthancPluginRestOutput* output)
   {
+    CheckAnswerSizeIsLessThan4GB(answer);
     OrthancPluginAnswerBuffer(GetGlobalContext(), output, answer.c_str(), answer.size(), mimeType);
   }
 
@@ -1564,6 +1579,26 @@
     OrthancPluginSendHttpStatusCode(GetGlobalContext(), output, httpError);
   }
 
+  void AnswerHttpError(uint16_t httpError,
+                       OrthancPluginRestOutput* output,
+                       const std::string& answer,
+                       const char* mimeType)
+  {
+    CheckAnswerSizeIsLessThan4GB(answer);
+
+    OrthancPluginSetHttpHeader(GetGlobalContext(),
+                               output,
+                               "content-type",
+                               mimeType);
+                               
+    OrthancPluginSendHttpStatus(GetGlobalContext(),
+                                output,
+                                httpError,
+                                answer.c_str(),
+                                static_cast<uint32_t>(answer.size()));
+  }
+
+
   void AnswerMethodNotAllowed(OrthancPluginRestOutput *output, const char* allowedMethods)
   {
     OrthancPluginSendMethodNotAllowed(GetGlobalContext(), output, allowedMethods);

--- a/Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h	Tue Apr 07 13:02:17 2026 +0200
+++ b/Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h	Tue Apr 07 13:03:02 2026 +0200
@@ -690,6 +690,11 @@
   void AnswerHttpError(uint16_t httpError,
                        OrthancPluginRestOutput* output);
 
+  void AnswerHttpError(uint16_t httpError,
+                       OrthancPluginRestOutput* output,
+                       const std::string& answer,
+                       const char* mimeType);
+
   void AnswerMethodNotAllowed(OrthancPluginRestOutput* output, const char* allowedMethods);
 
 #if ORTHANC_PLUGINS_VERSION_IS_ABOVE(1, 5, 0)
@@ -1026,6 +1031,13 @@
                                  value, OrthancPluginMetricsType_Default);
   }
 
+  inline void SetMetricsValue(const char* name,
+                              int64_t value)
+  {
+    OrthancPluginSetMetricsIntegerValue(GetGlobalContext(), name,
+                                        value, OrthancPluginMetricsType_Default);
+  }
+
   class MetricsTimer : public boost::noncopyable
   {
   private: