--- a/OrthancFramework/Sources/HttpServer/HttpContentNegociation.cpp	Wed Jun 28 08:29:43 2023 +0200
+++ b/OrthancFramework/Sources/HttpServer/HttpContentNegociation.cpp	Wed Jun 28 10:32:58 2023 +0200
@@ -66,7 +66,6 @@
     const Handler&  handler_;
     uint8_t         level_;
     float           quality_;
-    std::string     application_;
     Dictionary      parameters_;
 
     static float GetQuality(const Dictionary& parameters)
@@ -111,7 +110,6 @@
               const Dictionary& parameters) :
       handler_(handler),
       quality_(GetQuality(parameters)),
-      application_(type + "/" + subtype),
       parameters_(parameters)
     {
       if (type == "*" && subtype == "*")
@@ -248,7 +246,17 @@
         {
           std::string key, value;
           
-          if (!SplitPair(key, value, tokens[i], '='))
+          if (SplitPair(key, value, tokens[i], '='))
+          {
+            // Remove the enclosing quotes, if present
+            if (!value.empty() &&
+                value[0] == '"' &&
+                value[value.size() - 1] == '"')
+            {
+              value = value.substr(1, value.size() - 2);
+            }
+          }
+          else
           {
             key = Toolbox::StripSpaces(tokens[i]);
             value = "";

--- a/OrthancFramework/UnitTestsSources/RestApiTests.cpp	Wed Jun 28 08:29:43 2023 +0200
+++ b/OrthancFramework/UnitTestsSources/RestApiTests.cpp	Wed Jun 28 10:32:58 2023 +0200
@@ -461,7 +461,7 @@
   // preferred media types, but if they do not exist, then send the
   // text/x-dvi entity, and if that does not exist, send the
   // text/plain entity.""
-  const std::string T1 = "text/plain; q=0.5, text/html ;  hello  = world   , text/x-dvi; q=0.8, text/x-c";
+  const std::string T1 = "text/plain; q=0.5, text/html ;  hello  = \"world\"   , text/x-dvi; q=0.8, text/x-c";
   
   {
     HttpContentNegociation d;
@@ -526,6 +526,49 @@
     ASSERT_EQ(1u, h.GetParameters().size());
     ASSERT_EQ("0.5", h.GetParameters() ["q"]);
   }
+
+  // Below are the tests from issue 216:
+  // https://bugs.orthanc-server.com/show_bug.cgi?id=216
+
+  {
+    HttpContentNegociation d;
+    d.Register("application/dicom+json", h);
+    ASSERT_TRUE(d.Apply("image/webp, */*;q=0.8, text/html, application/xhtml+xml, application/xml;q=0.9"));
+    ASSERT_EQ("application", h.GetType());
+    ASSERT_EQ("dicom+json", h.GetSubType());
+    ASSERT_EQ(1u, h.GetParameters().size());
+    ASSERT_EQ("0.8", h.GetParameters() ["q"]);
+  }
+
+  {
+    HttpContentNegociation d;
+    d.Register("application/dicom+json", h);
+    ASSERT_TRUE(d.Apply("image/webp, */*; q  = \"0.8\"  , text/html, application/xhtml+xml, application/xml;q=0.9"));
+    ASSERT_EQ("application", h.GetType());
+    ASSERT_EQ("dicom+json", h.GetSubType());
+    ASSERT_EQ(1u, h.GetParameters().size());
+    ASSERT_EQ("0.8", h.GetParameters() ["q"]);
+  }
+
+  {
+    HttpContentNegociation d;
+    d.Register("application/dicom+json", h);
+    ASSERT_TRUE(d.Apply("text/html, application/xhtml+xml, application/xml, image/webp, */*;q=0.8"));
+    ASSERT_EQ("application", h.GetType());
+    ASSERT_EQ("dicom+json", h.GetSubType());
+    ASSERT_EQ(1u, h.GetParameters().size());
+    ASSERT_EQ("0.8", h.GetParameters() ["q"]);
+  }
+
+  {
+    HttpContentNegociation d;
+    d.Register("application/dicom+json", h);
+    ASSERT_TRUE(d.Apply("text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"));
+    ASSERT_EQ("application", h.GetType());
+    ASSERT_EQ("dicom+json", h.GetSubType());
+    ASSERT_EQ(1u, h.GetParameters().size());
+    ASSERT_EQ(".2", h.GetParameters() ["q"]);
+  }
 }