com.touwolf.esl.impl.EslMessageDecoder.java Source code

Introduction

Here is the source code for com.touwolf.esl.impl.EslMessageDecoder.java

Source

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package com.touwolf.esl.impl;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import java.net.URLDecoder;
import java.util.List;

/**
 *
 */
public class EslMessageDecoder extends ByteToMessageDecoder {
    private EslMessageImpl eslMsg = new EslMessageImpl();

    private StringBuilder sb = new StringBuilder();

    private String header = null;

    private String value = null;

    private boolean isHeader = true;

    private boolean isBody = false;

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
        while (in.isReadable()) {
            char ch = (char) in.readByte();
            if (isBody && ch == '\n') {
                eslMsg.setBody(decode(sb.toString()));
                out.add(eslMsg);
                isHeader = true;
                isBody = false;
                sb = new StringBuilder();
                eslMsg = new EslMessageImpl();
            } else if (isHeader && ch == '\n' && header == null && !isBody) {
                if ("api/response".equalsIgnoreCase(eslMsg.get("Content-Type"))) {
                    isHeader = false;
                    isBody = true;
                } else {
                    if (!eslMsg.getHeaders().isEmpty()) {
                        out.add(eslMsg);
                    }
                    eslMsg = new EslMessageImpl();
                }
                sb = new StringBuilder();
                header = null;
                value = null;
            } else if (isHeader && ch == ':' && !isBody) {
                header = sb.toString();
                sb = new StringBuilder();
                isHeader = false;
            } else if (ch == '\n' && !isBody) {
                value = decode(sb.toString());
                isHeader = true;
                sb = new StringBuilder();
                if (header != null && value != null) {
                    eslMsg.getHeaders().put(header.trim(), value.trim());
                }
                header = null;
                value = null;
            } else {
                sb.append(ch);
            }
        }
    }

    private String decode(String toString) {
        return toString.replace("%23", "#");
    }

}