Question

我正在用protobuffs（basho）编写一个erlang牧场应用程序，并且我在开始时包含了test_pb.hrl，（include("test_pb.hrl")）。但当我制作应用程序并运行时，它收到错误： {'module could not be loaded', [{protobuffs,next_field_num,[<<10,5,116,101,115,116,49>>],[]}, {test_pb,decode,3,[{file,"src/test_pb.erl"},{line,143}]}, {test_pb,decode,2,[{file,"src/test_pb.erl"},{line,138}]}, {reverse_protocol,handle_info,2, [{file,"src/reverse_protocol.erl"},{line,47}]}, {gen_server,handle_msg,5,[{file,"gen_server.erl"},{line,604}]}, {proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,239}]}]}

和第47行是：Msgdata = test_pb:decode_test(Data),

整个源文件是： ` %%您可以随意使用，重复使用和滥用此文件中的代码。

-module(reverse_protocol). 
-behaviour(gen_server).
-behaviour(ranch_protocol).
-import(lists, [reverse/1]).
-include("test_pb.hrl").
%% API.
-export([start_link/4]).

%% gen_server.
-export([init/1]).
-export([init/4]).
-export([handle_call/3]).
-export([handle_cast/2]).
-export([handle_info/2]).
-export([terminate/2]).
-export([code_change/3]).

-define(TIMEOUT, 5000).

-record(state, {socket, transport}).

%% API.

start_link(Ref, Socket, Transport, Opts) ->
proc_lib:start_link(?MODULE, init, [Ref, Socket, Transport, Opts]).

%% gen_server.

%% This function is never called. We only define it so that
%% we can use the -behaviour(gen_server) attribute.
init([]) -> {ok, undefined}.

init(Ref, Socket, Transport, _Opts = []) ->
ok = proc_lib:init_ack({ok, self()}),
ok = ranch:accept_ack(Ref),
ok = Transport:setopts(Socket, [{active, once}]),
gen_server:enter_loop(?MODULE, [],
    #state{socket=Socket, transport=Transport},
    ?TIMEOUT).

handle_info({tcp, Socket, Data}, State=#state{
    socket=Socket, transport=Transport}) ->
Transport:setopts(Socket, [{active, once}]),
io:format("receive data ~p~n", [Data]),
Msgdata = test_pb:decode_test(Data),
io:format("receive data unpack ~p~n", [Msgdata]),
Transport:send(Socket, reverse_binary(Data)),
{noreply, State, ?TIMEOUT};
handle_info({tcp_closed, _Socket}, State) ->
{stop, normal, State};
handle_info({tcp_error, _, Reason}, State) ->
{stop, Reason, State};
handle_info(timeout, State) ->
{stop, normal, State};
handle_info(_Info, State) ->
{stop, normal, State}.

handle_call(_Request, _From, State) ->
{reply, ok, State}.

handle_cast(_Msg, State) ->
{noreply, State}.

terminate(_Reason, _State) ->
ok.

code_change(_OldVsn, State, _Extra) ->
{ok, State}.

%% Internal.

reverse_binary(B) when is_binary(B) ->
[list_to_binary(lists:reverse(binary_to_list(
    binary:part(B, {0, byte_size(B)-2})
))), "\r\n"].

`

Answer 1

虚拟机无法找到protobuffs模块。如果您在deps文件夹中有protobuffs应用程序，请尝试将-pz deps/*/ebin添加到启动选项中。

Answer 2

如果您不确定模块是否已加载，请在erlang shell中尝试XXXX：module_info（）。如果错误，则不在路径中并尝试使用代码：paths（＆＃34; xxxxxx / ebin＆＃34;）来添加它。

erlang protobuf错误：无法加载模块

2 个答案: