Question

我正在使用dcodeIO/protobuf.js lib（版本6.8.4）来解析浏览器中的protobuf消息。我可以使用简单的原型文件，只要不导入另一个原型文件。

在主要文件中导入其他原型文件会破坏一切。

这就是我所拥有的：

文件结构

- assets/
    |-api/
    |    |-v1/
    |    |    |-messageB.proto
    |    |-messageA.proto
- foo.js

messageA.proto

syntax = "proto3";
package com.assets.api;
import "api/v1/messageB.proto";

message MessageA{
    MessageB foo = 0;
}

messageB.proto

syntax = "proto3";
package com.assets.api.v1;

message MessageB {
    string bar= 0;
}

与6.8.4：

var MessageProto = null;
protobuf.load({root:"assets", file:"api/messageA.proto"}, function (err, root) {
    if (root) { MessageAProto = root.lookupType("com.assets.api.MessageA");
}});
data = MessageProto .decode(rawData);

    Error: no such type

at Root.lookupType (http://localhost:63342/xx/build/app/vendor/protobuf/dist/protobuf.js:3463:15)
at http://localhost:63342/xx/build/app/src/app/asset/asset.module.js:320:53
at finish (http://localhost:63342/xx/build/app/vendor/protobuf/dist/protobuf.js:5212:9)
at Root.load (http://localhost:63342/xx/build/app/vendor/protobuf/dist/protobuf.js:5316:9)
at Object.load (http://localhost:63342/xx/build/app/vendor/protobuf/dist/protobuf.js:2547:17)
at new <anonymous> (http://localhost:63342/xx/build/app/src/app/asset/asset.module.js:316:22)
at Object.instantiate (http://localhost:63342/xx/build/app/vendor/angular/angular.js:4786:14)
at $controller (http://localhost:63342/xx/build/app/vendor/angular/angular.js:10607:28)
at Object.<anonymous> (http://localhost:63342/xx/build/app/vendor/angular-ui-router/release/angular-ui-router.js:4081:28)
at http://localhost:63342/xx/build/app/vendor/angular/angular.js:1259:18

5.0：

var MessageProto = null;
dcodeIO.ProtoBuf.convertFieldsToCamelCase = true;
dcodeIO.ProtoBuf.loadProtoFile({root: "assets", file: "api/messageA.proto"}, function (err, builder) {
    if (builder) { MessageProto = builder.build("com.assets.api.MessageA");
 }});
data = MessageProto .decode(rawData);

。

OK

Answer 1

您需要首先检查protobuf.load是否已加载您的组件。如果没有加载它就不会工作。

您可以将负载更改为loadSync

    var MessageProto = null;
    protobuf.loadSync({root:"assets", file:"api/messageA.proto"}, function(err, root) {
        if (root) { MessageAProto = root.lookupType("com.assets.api.MessageA");
    }});

data = MessageProto .decode（rawData）;

您可以选择使用静态方法。

    import { AwesomeMessage } from "./bundle.js";

    // example code
    let message = AwesomeMessage.create({ awesomeField: "hello" });
    let buffer  = AwesomeMessage.encode(message).finish();
    let decoded = AwesomeMessage.decode(buffer);

创建静态文件

pbjs -t json-module -w commonjs -o bundle.js file1.proto file2.proto

如何使用导入加载proto文件

1 个答案: