+-
在Java中从Http请求检索Msgpack
我试图在AsyncTask中检索由我的Rails服务器发送的msgpack对象.

Rails控制器-Rails

respond_to do |format|
      format.json { render json: data.to_json }
      format.msgpack { render msgpack: data.to_msgpack }
end

AsyncTask-Java

        HttpEntity messageEntity = httpResponse.getEntity();

            if (messageEntity != null) {
                MessagePack msgpack = new MessagePack();

                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                messageEntity.writeTo(baos);
                byte[] bytes = baos.toByteArray();

                msgpack.read(bytes);    

                [...]
            } 

我的对象如下图所示

{
    "aspects": {
        "1438166757890": {
            "deleted": "0",
            "name": "Choc",
            "updated": "1438166757889"
        },
    [...]
    },
    "items": {
        "1438166757872": {
            "aspects": [
                1438166757890,
                1438166757905,
                1438166757929,
                1438166757947,
                1438166757964,
                1438166757980,
                1438166757997
            ],
            "deleted": "0",
            "name": "OTHER",
            "updated": "1438166757872"
        },
    [...]
    }
}

但是当我试图用我的msgpack对象读取它时

值v = msgpack.read(bytes);

我有这个错误

java.io.IOException:无效字节:-39

或者当我使用那种模板时

Map< String,Map< Integer,Map< String,String>> v = msgpack.read(bytes,k);

我正进入(状态

org.msgpack.MessageTypeException:意外的数组值
要么
org.msgpack.MessageTypeException:意外的映射值

我在Stack或Google上找不到任何有关这种阅读方式的好的文档. Msgpack官方网站将List< String>序列化和反序列化.

List<String> src = new ArrayList<String>();
src.add("msgpack");
src.add("kumofs");
src.add("viver");

MessagePack msgpack = new MessagePack();

byte[] raw = msgpack.write(src);

Value dynamic = msgpack.read(raw);
List<String> dst2 = new Converter(dynamic)
    .read(Templates.tList(Templates.TString));

有人已经遇到了这个问题吗?如果是的话,如何在Java中管理Msgpack模板?

编辑:

我使用msgpack.read(bytes);时的Stacktrace;没有模板:

W/System.err( 2999): java.io.IOException: Invalid byte: -39
W/System.err( 2999): at org.msgpack.unpacker.MessagePackUnpacker.readOneWithoutStackLarge(MessagePackUnpacker.java:323)
W/System.err( 2999): at org.msgpack.unpacker.MessagePackUnpacker.readOneWithoutStack(MessagePackUnpacker.java:139)
W/System.err( 2999): at org.msgpack.unpacker.MessagePackUnpacker.readOne(MessagePackUnpacker.java:73)
W/System.err( 2999): at org.msgpack.unpacker.MessagePackUnpacker.readValue(MessagePackUnpacker.java:559)
W/System.err( 2999): at org.msgpack.unpacker.AbstractUnpacker.readValue(AbstractUnpacker.java:65)
W/System.err( 2999): at org.msgpack.MessagePack.read(MessagePack.java:297)
W/System.err( 2999): at org.msgpack.MessagePack.read(MessagePack.java:283)

当我使用

Template<Map<String, String>> map2 = Templates.tMap(Templates.TString, Templates.TString);

Map<String, String> v = msgpack.read(bytes, map2);

堆栈跟踪 :

W/System.err( 1510): org.msgpack.MessageTypeException: Unexpected array value
W/System.err( 1510): at org.msgpack.unpacker.Accept.acceptArray(Accept.java:79)
W/System.err( 1510): at org.msgpack.unpacker.MessagePackUnpacker.readOneWithoutStackLarge(MessagePackUnpacker.java:264)
W/System.err( 1510): at org.msgpack.unpacker.MessagePackUnpacker.readOneWithoutStack(MessagePackUnpacker.java:139)
W/System.err( 1510): at org.msgpack.unpacker.MessagePackUnpacker.readOne(MessagePackUnpacker.java:73)
W/System.err( 1510): at org.msgpack.unpacker.MessagePackUnpacker.readString(MessagePackUnpacker.java:472)
W/System.err( 1510): at org.msgpack.template.StringTemplate.read(StringTemplate.java:46)
W/System.err( 1510): at org.msgpack.template.StringTemplate.read(StringTemplate.java:25)
W/System.err( 1510): at org.msgpack.template.AbstractTemplate.read(AbstractTemplate.java:31)
W/System.err( 1510): at org.msgpack.template.MapTemplate.read(MapTemplate.java:72)
W/System.err( 1510): at org.msgpack.template.MapTemplate.read(MapTemplate.java:27)
W/System.err( 1510): at org.msgpack.template.AbstractTemplate.read(AbstractTemplate.java:31)
W/System.err( 1510): at org.msgpack.template.MapTemplate.read(MapTemplate.java:72)
W/System.err( 1510): at org.msgpack.template.MapTemplate.read(MapTemplate.java:27)
W/System.err( 1510): at org.msgpack.template.AbstractTemplate.read(AbstractTemplate.java:31)
W/System.err( 1510): at org.msgpack.template.MapTemplate.read(MapTemplate.java:72)
W/System.err( 1510): at org.msgpack.template.MapTemplate.read(MapTemplate.java:27)
W/System.err( 1510): at org.msgpack.template.AbstractTemplate.read(AbstractTemplate.java:31)
W/System.err( 1510): at org.msgpack.MessagePack.read(MessagePack.java:510)
W/System.err( 1510): at org.msgpack.MessagePack.read(MessagePack.java:479)
最佳答案
感谢@naXa分析,我决定在git上找到另一个msgpack回购.经过一番研究,我发现了 MessagePack for Java.

提取文件后,我使用sbt使用./sbt publish local命令从那里构建我的.jar文件.

构建完成后,我将主文件,源文件和javadoc .jar文件放入以下目录中:〜/ msgpack-java-07-develop / msgpack-core / target.

我将所有.jar文件导入到Eclipse项目中,更改了构建路径,然后,为了检索msgpack内容,我可以编写这些简单的行来获取包含值的Map:

HttpEntity messageEntity = httpResponse.getEntity();

if (messageEntity != null) {
    MessagePack msgpack = new MessagePack();

    MessageUnpacker u = msgpack.newUnpacker(messageEntity.getContent());
    MapValue mv = (MapValue) u.unpackValue();

    Map<Value, Value> map = mv.map();
点击查看更多相关文章

转载注明原文:在Java中从Http请求检索Msgpack - 乐贴网