com.zhuowenfeng.devtool.hs_server.handler.HttpServiceHandler.java Source code

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Here is the source code for com.zhuowenfeng.devtool.hs_server.handler.HttpServiceHandler.java

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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package com.zhuowenfeng.devtool.hs_server.handler;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.DecoderResult;
import io.netty.handler.codec.http.Cookie;
import io.netty.handler.codec.http.CookieDecoder;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpContent;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpObject;
import io.netty.handler.codec.http.HttpRequest;
import io.netty.handler.codec.http.LastHttpContent;
import io.netty.handler.codec.http.QueryStringDecoder;
import io.netty.handler.codec.http.ServerCookieEncoder;
import io.netty.util.CharsetUtil;

import java.nio.charset.Charset;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import net.sf.json.JSON;
import net.sf.json.JSONObject;

import com.sun.tools.attach.VirtualMachine;
import com.sun.tools.attach.VirtualMachineDescriptor;
import com.zhuowenfeng.devtool.hs_server.HSServerContext;

import static io.netty.handler.codec.http.HttpHeaders.Names.*;
import static io.netty.handler.codec.http.HttpHeaders.*;
import static io.netty.handler.codec.http.HttpResponseStatus.*;
import static io.netty.handler.codec.http.HttpVersion.*;

public class HttpServiceHandler extends SimpleChannelInboundHandler<Object> {

    private HttpRequest request;

    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
        ctx.flush();
    }

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, Object msg) {
        HSServerContext hsContext = new HSServerContext();
        if (msg instanceof HttpRequest) {
            HttpRequest request = this.request = (HttpRequest) msg;
            hsContext.setRequest(request);

            String uri = request.getUri();
            hsContext.setRequestUri(uri);

            if (is100ContinueExpected(request)) {
                send100Continue(ctx);
            }

            QueryStringDecoder queryStringDecoder = new QueryStringDecoder(request.getUri());
            Map<String, List<String>> params = queryStringDecoder.parameters();
            JSONObject pathVariables = new JSONObject();
            if (!params.isEmpty()) {
                for (Entry<String, List<String>> p : params.entrySet()) {
                    String key = p.getKey();
                    List<String> vals = p.getValue();
                    for (String val : vals) {
                        pathVariables.put(key, val);
                    }
                }
            }
            hsContext.setPathVariables(pathVariables);
        }

        if (msg instanceof HttpContent) {
            HttpContent httpContent = (HttpContent) msg;
            ByteBuf content = httpContent.content();
            JSONObject requestContent = new JSONObject();
            if (content.isReadable()) {
                requestContent = JSONObject.fromObject(content.toString(CharsetUtil.UTF_8));
            }
            hsContext.setRequestContent(requestContent);
            if (msg instanceof LastHttpContent) {
                LastHttpContent trailer = (LastHttpContent) msg;
                JSONObject result = HttpServiceDispatcher.dispatch(hsContext);
                writeResponse(trailer, ctx, result);
            }
        }
    }

    private boolean writeResponse(HttpObject currentObj, ChannelHandlerContext ctx, JSONObject result) {

        boolean keepAlive = isKeepAlive(request);
        FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1,
                currentObj.getDecoderResult().isSuccess() ? OK : BAD_REQUEST,
                Unpooled.copiedBuffer(result.toString(), CharsetUtil.UTF_8));
        response.headers().set(CONTENT_TYPE, "application/json; charset=UTF-8");
        if (keepAlive) {
            response.headers().set(CONTENT_LENGTH, response.content().readableBytes());
            response.headers().set(CONNECTION, HttpHeaders.Values.KEEP_ALIVE);
        }
        String cookieString = request.headers().get(COOKIE);
        if (cookieString != null) {
            Set<Cookie> cookies = CookieDecoder.decode(cookieString);
            if (!cookies.isEmpty()) {
                for (Cookie cookie : cookies) {
                    response.headers().add(SET_COOKIE, ServerCookieEncoder.encode(cookie));
                }
            }
        } else {
            response.headers().add(SET_COOKIE, ServerCookieEncoder.encode("key1", "value1"));
            response.headers().add(SET_COOKIE, ServerCookieEncoder.encode("key2", "value2"));
        }
        ctx.write(response);
        return keepAlive;
    }

    private static void send100Continue(ChannelHandlerContext ctx) {
        FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, CONTINUE);
        ctx.write(response);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}