如何使用 Protobuf.js 解码原始文件的 Json 格式?
How to decode Json Format for the proto files using Protobuf.js?
我想了解一下,ProtoBuf.js
是如何工作的?
ProtoBuf - https://github.com/dcodeIO/ProtoBuf.js
我的原型文件 gameSetting.proto
看起来像:
message GameSettings {
required string gameName = 1;
repeated Category categories = 2;
}
message Category {
required int32 categoryId = 1;
required string categoryAbbreviation = 2;
required string categoryName = 3;
required string numberInSquad = 4;
required string numberInTeam = 5;
required string captain = 6;
}
在这里,我正在实施 JavaScript 代码解码和编码数据:
var ProtoBuf = dcodeIO.ProtoBuf;
var protoURL = '../_doc/protobuf/gameSettings.proto';
var dataURL = '../xmlapi?type=game-settings&competitionid=1&outputtype=text';
var builder = ProtoBuf.loadProtoFile( protoURL, function(err, builder) {
// WE CAN ALSO TRY USING JSON FORMAT FOR THE PROTO FILES:
// https://github.com/dcodeIO/ProtoBuf.js/wiki/Builder#using-json-without-the-proto-parser
// encoding test
var GS_build = builder.build( 'GameSettings' );
var GS = new GS_build({
"gameName": "games Test 2015",
"categories": [{
"categoryId": 1,
"categoryAbbreviation": "GK",
"categoryName": "Goalkeeper",
"numberInSquad": "2-2",
"numberInTeam": "1-1",
"captain": "0-1"
}]
});
// encode various types to test
var GS_buffer = GS.encode();
var GS_base64 = GS.encode64(); // this looks like something to use with AJAX
var GS_arrayBuffer = GS_buffer.toArrayBuffer();
// decoding test
var GS_buffer_decoded = GS_build.decode( GS_buffer );
var GS_buffer_decoded_raw = GS_buffer_decoded.toRaw();
var GS_base64_decoded = GS_build.decode64( GS_base64 );
var GS_base64_decoded_raw = GS_base64_decoded.toRaw();
var GS_arrayBuffer_decoded = GS_build.decode( GS_arrayBuffer );
var GS_arrayBuffer_decoded_raw = GS_arrayBuffer_decoded.toRaw();
// decoding AJAX test
$.get( dataURL, function( data ){
var GS = GS_build.decode( data );
});
});
The code // encoding test
and // decoding test
- works fine.
但是代码有问题:
var GS = GS_build.decode( data )
我该如何解决?
这里的API是:
Message.decode(buffer:Uint8Array|ArrayBuffer|Buffer|string, encoding:string=)
with encoding
仅当缓冲区是字符串时才需要。因此,为了能够解码一大块数据,您必须确保它是一个 ArrayBuffer/Uint8Array 或者,如果它是一个字符串,则提供正确的编码。
使用 jQuery 的 $.get
而没有任何选项可能会损坏数据。
我想了解一下,ProtoBuf.js
是如何工作的?
ProtoBuf - https://github.com/dcodeIO/ProtoBuf.js
我的原型文件 gameSetting.proto
看起来像:
message GameSettings {
required string gameName = 1;
repeated Category categories = 2;
}
message Category {
required int32 categoryId = 1;
required string categoryAbbreviation = 2;
required string categoryName = 3;
required string numberInSquad = 4;
required string numberInTeam = 5;
required string captain = 6;
}
在这里,我正在实施 JavaScript 代码解码和编码数据:
var ProtoBuf = dcodeIO.ProtoBuf;
var protoURL = '../_doc/protobuf/gameSettings.proto';
var dataURL = '../xmlapi?type=game-settings&competitionid=1&outputtype=text';
var builder = ProtoBuf.loadProtoFile( protoURL, function(err, builder) {
// WE CAN ALSO TRY USING JSON FORMAT FOR THE PROTO FILES:
// https://github.com/dcodeIO/ProtoBuf.js/wiki/Builder#using-json-without-the-proto-parser
// encoding test
var GS_build = builder.build( 'GameSettings' );
var GS = new GS_build({
"gameName": "games Test 2015",
"categories": [{
"categoryId": 1,
"categoryAbbreviation": "GK",
"categoryName": "Goalkeeper",
"numberInSquad": "2-2",
"numberInTeam": "1-1",
"captain": "0-1"
}]
});
// encode various types to test
var GS_buffer = GS.encode();
var GS_base64 = GS.encode64(); // this looks like something to use with AJAX
var GS_arrayBuffer = GS_buffer.toArrayBuffer();
// decoding test
var GS_buffer_decoded = GS_build.decode( GS_buffer );
var GS_buffer_decoded_raw = GS_buffer_decoded.toRaw();
var GS_base64_decoded = GS_build.decode64( GS_base64 );
var GS_base64_decoded_raw = GS_base64_decoded.toRaw();
var GS_arrayBuffer_decoded = GS_build.decode( GS_arrayBuffer );
var GS_arrayBuffer_decoded_raw = GS_arrayBuffer_decoded.toRaw();
// decoding AJAX test
$.get( dataURL, function( data ){
var GS = GS_build.decode( data );
});
});
The code
// encoding test
and// decoding test
- works fine.
但是代码有问题:
var GS = GS_build.decode( data )
我该如何解决?
这里的API是:
Message.decode(buffer:Uint8Array|ArrayBuffer|Buffer|string, encoding:string=)
with encoding
仅当缓冲区是字符串时才需要。因此,为了能够解码一大块数据,您必须确保它是一个 ArrayBuffer/Uint8Array 或者,如果它是一个字符串,则提供正确的编码。
使用 jQuery 的 $.get
而没有任何选项可能会损坏数据。