Erlang中使用protobuff

Erlang中使用protobuff

github:

https://github.com/ngerakines/erlang_protobuffs/tree/master

下载压缩包

编译src中的4个文件

pokemon_pb.erl 

protobuffs.erl

protobuffs_compile.erl

protobuffs_parser.erl

分别生成

pokemon_pb.beam

protobuffs.beam

protobuffs_compile.beam

protobuffs_parser.beam

erl命令

protobuffs_compile:scan_file("文件路径/文件名.proto").

即可生成和文件名相对应的

文件名_pb.beam

文件名_pb.hrl

例如test.proto

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

message Family {
  repeated Person person = 1;
}

运行命令

protobuffs_compile:scan_file("test.proto").

对应生成test_pb.hrl文件和test_pb.beam文件

关键代码

-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).

测试

1> c(test).
{ok,test}

2> test:encode().
<<8,25,18,4,74,111,104,110>>

8> test:decode().
{person,25,"John"}

3> 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,...>>

4> test:decode_repeat().
{family,[{person,25,"John"},
         {person,23,"Lucy"},
         {person,2,"Tony"}]}