You have to use the –proto_path command-line flag (aka -I) to tell protoc where to look for .proto files. If you don’t provide a path, by default it will only search the current directory. See the documentation (under “Generating Your Classes” at the end of the page), or type protoc –help.
Option 1 – Use stream: rpc GetItems (ItemsQuery) returns (stream Item) { } Option 2 – Set a response message which will use a repeated object: service MyService { rpc GetItem (ItemQuery) returns (ItemResponse) { } } message ItemQuery { int id = 1; } message ItemResponse { repeated Item items = 1; } message … Read more
Edit: Since Oct 23,2018 the gRPC-Web project is GA, which might be the most official/standardized way to solve your problem. (Even if it’s already 2018 now… đ ) From the GA-Blog: “gRPC-Web, just like gRPC, lets you define the service âcontractâ between client (web) and backend gRPC services using Protocol Buffers. The client can then … Read more
Had the same issue and I resolved it by using : conda install protobuf
You have to specify an input type. If you don’t want the method to take any parameters, define an empty message type, like: message WhoAreYouParams {} The reason this is required is so that if you later need to add an optional parameter, you can do so without breaking existing code.
There’s an expired IETF proposal that suggests application/protobuf. It does not address the question how the receiving side could determine the particular message type. Previous discussions suggested using a parameter to specify package and message, e.g. application/protobuf; proto=org.some.Message In practice, the types you listed seem to be indeed the ones in use, for example the … Read more
[edit] Google’s open source implementation of protocol buffers is available on GitHub The official protobuf project support only Java, C++, and Python. Not JavaScript. According to the Wiki of the project, there are three projects porting protocol buffers to JavaScript. Protobuf.js: https://github.com/dcodeIO/ProtoBuf.js protobuf-js: http://code.google.com/p/protobuf-js/ protojs: http://github.com/sirikata/protojs Protobuf.js is up to date. protobuf-js has not been … Read more
This post compares serialization speeds and sizes in .NET, including JSON, BSON and XML. http://james.newtonking.com/archive/2010/01/01/net-serialization-performance-comparison.aspx
I’d recommend using protobufâjson converters from google’s protobuf library: from google.protobuf.json_format import MessageToJson json_obj = MessageToJson(org) You can also serialise the protobuf to a dictionary: from google.protobuf.json_format import MessageToDict dict_obj = MessageToDict(org) Refer to the protobuf package API documentation: https://developers.google.com/protocol-buffers/docs/reference/python/ (see module google.protobuf.json_format).
The protoc version I got through pip show protobuf and protoc –version were different. The version in pip was a bit outdated. After I upgraded the pip version with pip install –upgrade protobuf the problem was solved.