.Net Protocol Buffers to JSON, JsonFormatReader class does not handle outmost curly braces? -

i working on using google protocol buffers, using protobuf-csharp-port library (https://code.google.com/p/protobuf-csharp-port/). google.protocolbuffers.serialization class has jsonformatreader / jsonformatwriter class, when use them not place beginning , ending curly braces json document, nor can read same document write if add beginning , ending braces.

so example calling

        pb.protobufmessage message = createmymessage();          string json;         using (stringwriter sw = new stringwriter())         {             icodedoutputstream output = jsonformatwriter.createinstance(sw);              message.writeto(output);             output.flush();             json = sw.tostring();         } 

creates:

"\"field1\":\"prop1\",\"field2\":1,\"subitem\":{\"x\":0,\"y\":0,\"z\":0}" 

if try parse

string jsonmessage = "{\"field1\":\"prop1\",\"field2\":1,\"subitem\":{\"x\":0,\"y\":0,\"z\":0}}" 

using

    pb.protobufmessage copy;     icodedinputstream input = jsonformatreader.createinstance(jsonmessage);     copy = pb.protobufmessage.createbuilder().mergefrom(input).build(); 

i following:

(1:1) error: unexpected token '{', expected: '"'.     @ google.protocolbuffers.serialization.jsoncursor.assert(boolean cond, char expected)    @ google.protocolbuffers.serialization.jsoncursor.consume(char ch)    @ google.protocolbuffers.serialization.jsoncursor.readstring()    @ google.protocolbuffers.serialization.jsonformatreader.peeknext(string& field)    @ google.protocolbuffers.serialization.abstractreader.google.protocolbuffers.icodedinputstream.readtag(uint32& fieldtag, string& fieldname)    @ ... 

why { } missing, , valid json?

you need write/read message start/end. like:

output.writemessagestart(); message.writeto(output); output.writemessageend(); 

similary wilhe reading:

input.readmessagestart(); builder.mergefrom(input); input.readmessageend(); 

the above code works json , binary reader/writers.