- Fixed encoding of multibyte UTF-8 sequences to JSON (fixes #96).

- Added test case for converting multibyte UTF-8 sequences to JSON.

CHANGELOG.md

@@ -1,3 +1,10 @@
+v0.6.1
+======
+Bug fixes.
+
+- Fixed encoding of multibyte UTF-8 sequences to JSON (fixes #96).
+- Added test case for converting multibyte UTF-8 sequences to JSON.
+
 v0.6.0
 ======
 Better support for asynchronous RPC and event handlers.

cppwamp/include/cppwamp/internal/json.ipp

@@ -204,9 +204,9 @@ struct EncodeJson : public Visitor<>
         case '\t': writeChar(buf, '\\'); writeChar(buf, 't'); return;
         }
 
-        if (c <= 0x1f)
+        auto n = static_cast<unsigned int>(c);
+        if (n <= 0x1f)
         {
-            auto n = static_cast<unsigned int>(c);
             char str[8];
             auto length = std::snprintf(str, sizeof(str), "\\u%04X", n);
             assert(length < sizeof(str));

cppwamp/include/cppwamp/version.hpp

@@ -20,10 +20,10 @@
 #define CPPWAMP_MINOR_VERSION 6
 
 /// Patch version for backwards-compatible bug fixes.
-#define CPPWAMP_PATCH_VERSION 6
+#define CPPWAMP_PATCH_VERSION 1
 
 /// Integer version number, computed as `(major*10000) + (minor*100) + patch`
-#define CPPWAMP_VERSION 600
+#define CPPWAMP_VERSION 601
 
 namespace wamp
 {

test/codectestjson.cpp

@@ -322,6 +322,24 @@ GIVEN( "an object Variant with control characters in a key" )
         }
     }
 }
+GIVEN( "a string Variant with multi-byte UTF-8 characters" )
+{
+    std::string s = "\u0080\u07ff\u0800\uffff\u00010000\u0010ffff";
+    Variant v = s;
+
+    WHEN( "encoding to JSON and decoding back" )
+    {
+        std::string encoded;
+        Json::encode(v, encoded);
+        Variant decoded;
+        Json::decode(encoded, decoded);
+
+        THEN( "the decoded Variant matches the original" )
+        {
+            CHECK( decoded == v );
+        }
+    }
+}
 }
 
 #endif // #if CPPWAMP_TESTING_CODEC