Erlang uses protobuf In the Erlang Project

Protobuf is a serialization framework of Google. Similar to XML and JSON, protobuf is based on binary and is much shorter than XML to indicate the same content. You can also define some optional fields, it is widely used for communication between the server and the client. This article focuses on how to use protobuf in Erlang.

First, Google does not provide direct support for the Erlang language, so the third-party protobuf Library (erlang_protobuffs) used here)

Define a protobuf structure and save it as test. proto, as follows:

message Person {  required int32 age = 1;  required string name = 2;}message Family {  repeated Person person = 1;}

Compile the protobuf structure and generate the corresponding Erlang code:

% 生成相应的erl和hrl文件protobuffs_compile:scan_file_src("test.proto").% 生成相应的beam和hrl文件protobuffs_compile:scan_file("test.proto").

The following is an example of how to use it:

-module(test).-compile([export_all]).-include("test_pb.hrl").encode() ->Person = #person{age=25, name="John"},test_pb:encode_person(Person).decode() ->Data = encode(),test_pb:decode_person(Data).encode_repeat() ->RepeatData =[#person{age=25, name="John"},#person{age=23, name="Lucy"},#person{age=2, name="Tony"}],Family = #family{person=RepeatData},test_pb:encode_family(Family).decode_repeat() ->Data = encode_repeat(),test_pb:decode_family(Data).

Run the Code as follows:

6> c(test).{ok,test}7> test:encode().<<8,25,18,4,74,111,104,110>>8> test:decode().{person,25,"John"}9> test:encode_repeat().<<10,8,8,25,18,4,74,111,104,110,10,8,8,23,18,4,76,117,99,  121,10,8,8,2,18,4,84,111,110,...>>10> test:decode_repeat().{family,[{person,25,"John"},         {person,23,"Lucy"},         {person,2,"Tony"}]}

Erlang uses protobuf In the Erlang Project