json文本协议

json：对象－字符串－byte[] －传输－byte[]－字符串－对象

pb：对象－byte[]－传输byte[]－对象

另一个例子在：pb协议 jdk序列化协议，考虑到文章太长，放于此instead of the bottom

client：

    String wholeUrl = String.format("%s?sdkappid=%d&random=%d", URL, SDKAPPID, rnd);

        java.net.URL object = new URL(wholeUrl);
        HttpURLConnection con = (HttpURLConnection) object.openConnection();
        con.setDoOutput(true);
        con.setDoInput(true);
        con.setRequestProperty("Content-Type", "application/json");
        con.setRequestProperty("Accept", "application/json");
        con.setRequestMethod("POST");
        JSONObject data = new JSONObject();
        JSONObject tel = new JSONObject();
        tel.put("nationcode", nationCode);
        String phone = phoneNumber;
        tel.put("phone", phone);
        data.put("type", "0");
        data.put("msg", content);
        String sig = stringMD5(APPKEY.concat(phone));
        data.put("sig", sig);
        data.put("tel", tel);
        OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream(), "utf-8");
        wr.write(data.toString());
        wr.flush();

        // 显示 POST 请求返回的内容
        StringBuilder sb = new StringBuilder();
        int HttpResult = con.getResponseCode();
        if (HttpResult == HttpURLConnection.HTTP_OK)
        {
            BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(), "utf-8"));
            String line;
            while ((line = br.readLine()) != null)
            {
                sb.append(line + "
");
            }
            br.close();
            JSONObject reObj = new JSONObject(sb.toString());
            String res = (String)reObj.get("result");
            if(!"0".equals(res)) {
                System.out.println("" + sb.toString());
                LOGGER.error("SmsSender::sendMsg" + "-" + phoneNumber + ","+(String)reObj.get("errmsg"));
            } else {

            }


        } else
        {
            LOGGER.error("send failed and rps is: " + con.getResponseMessage());
            throw new SmsException("send failed and rps is: " + con.getResponseMessage());
        }

请求：

JSONObject data = new JSONObject();
OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream(), "utf-8");
wr.write(data.toString());

应答：

BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(), "utf-8"));
String line;
while ((line = br.readLine()) != null)
{
    sb.append(line + "
");
}
br.close();
JSONObject reObj = new JSONObject(sb.toString());
String res = (String)reObj.get("result");

server：

基于netty的http server

响应请求，读取参数：

HttpServerHandler

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) throws Exception {

        // 获取channel中的URI
        Attribute<String> attr = ctx.channel().attr(AttributeMapConstant.NETTY_CHANNEL_KEY_HTTP_REQ_URI);
        String uri = attr.get();

        byte[] bs = new byte[msg.readableBytes()];
        msg.readBytes(bs);
        String json = new String(bs);

BaseReq baseReq = JSON.parseObject(json, BaseReq.class);

返回应答：

tws：

HttpServerHandler

    public static void rspTws(RequestIdentity ri, BaseDto dto) {
        String json = JSON.toJSONString(dto);

        Channel channel = ri.getClientChannel();
        if (channel != null && channel.isActive()) {
            logger.info("3.返回http客户端:{}，流水号：{}", json, ri.getReqId());

            channel.writeAndFlush(getJsonBuffer(json))

 String json = JSON.toJSONString(dto);

    /**
     * JSON转ByteBuf
     *
     * @param json
     * @return
     */
    private static ByteBuf getJsonBuffer(String json) {
        ByteBuf buffer = Unpooled.buffer();
        buffer.writeBytes(json.getBytes());
        return buffer;
    }

 json.getBytes()

/**
 * HTTP消息体编码器
 * @author shane
 *
 */
public class HttpBodyEncoder extends MessageToMessageEncoder<ByteBuf> {

	@Override
	protected void encode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) throws Exception {
		out.add(HttpCreateor.buildFullHttpResponse(msg).retain());
	}

}

	public static FullHttpResponse buildFullHttpResponse(ByteBuf msg) {
		// 返回信息
		FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK, msg);
		response.headers().set(HttpHeaderNames.CONTENT_TYPE, String.format("%s;charset=UTF-8", HttpHeaderValues.TEXT_PLAIN));
		response.headers().set(HttpHeaderNames.CONTENT_LENGTH, response.content().readableBytes());
        // 返回
        return response;
	}

action：

public class BodyToResponseEncoder extends MessageToMessageEncoder<ResponseMessage> {

    @Override
    protected void encode(ChannelHandlerContext channelHandlerContext, ResponseMessage responseMessage, List<Object> list) throws Exception {

        String json = JSON.toJSONString(responseMessage);

        FullHttpResponse response = new DefaultFullHttpResponse(
                HttpVersion.HTTP_1_1,
                HttpResponseStatus.OK,
                Unpooled.wrappedBuffer(json.getBytes("utf-8")));
        response.headers().set(HttpHeaders.Names.CONTENT_TYPE, "application/json;charset=UTF-8");
        response.headers().set(HttpHeaders.Names.CONTENT_LENGTH, response.content().readableBytes());
        response.headers().set(HttpHeaders.Names.CONNECTION, HttpHeaders.Values.KEEP_ALIVE);

        // 下面2个支持跨域
        response.headers().set(HttpHeaders.Names.ACCESS_CONTROL_ALLOW_ORIGIN, "*");
        response.headers().set(HttpHeaders.Names.ACCESS_CONTROL_ALLOW_HEADERS, HttpHeaders.Names.CONTENT_TYPE);

        list.add(response);
    }
}

 String json = JSON.toJSONString(responseMessage);

json.getBytes("utf-8")