本人用netty4.0做Http服務器模塊時,出現了一個Bug,從平臺發送過來的充值請求接收不到,充值請求是Post方式,自己寫了個post工具模擬充值請求,發現:能收到HttpRequest,但收不到HttpContent。
消息分發器代碼:
protected void channelRead0(ChannelHandlerContext ctx, Object data)
throws Exception {
if (data instanceof HttpRequest) {
.....
}
else if(data instanceof HttpContent){
....
}
}
這是以前沒出問題時的部分代碼,Post請求是分兩次收到的,一次是HttpRequest,只有Http 協議頭,一次是HttpContent,內容是data form數據。
消息處理鏈代碼:
ChannelPipeline pipeline = channel.pipeline();
pipeline.addLast(new HttpServerCodec());
pipeline.addLast(HANDLER);
之後修改了消息處理鏈的代碼,因爲不能響應太長數據消息:
@Override
protected void initChannel(SocketChannel channel) throws Exception {
ChannelPipeline pipeline = channel.pipeline();
pipeline.addLast(new HttpServerCodec());
pipeline.addLast( new HttpObjectAggregator(65536));
pipeline.addLast(new ChunkedWriteHandler());
// pipeline.addLast(new HttpRequestDecoder());
pipeline.addLast(HANDLER);
添加HttpObjectAggregator和ChunkedWriteHandler,結果就出現了這個問題
相應的分發器代碼也要改
protected void channelRead0(ChannelHandlerContext ctx, Object data)
throws Exception {
//DefaultHttpRequest
//FullHttpRequest
if(data instanceof FullHttpRequest){
FullHttpRequest fhr = (FullHttpRequest)data;
String uri = fhr.getUri();
int platType = -1;
int action = 0;
if(uri.startsWith("/exchange")){
platType = PlatformTypes.QIHOO;
action = PlatformManager.ACTION_EXCHANGE;
int len = fhr.content().readableBytes();
if(len > 0){
byte[] content = new byte[len];
fhr.content().readBytes(content);
String contentStr = new String(content, "UTF-8");
Map<String, String> paramMap = HttpUtil.url2Map(contentStr);
PlatformManager.getInstance().doAction(platType, action, paramMap, ctx.channel());
}
return;
}
}
FullHttpRequest的協議頭和Form數據是在一起的,不用分開讀,之前分開接收的是DefaultHttpRequest與HttpContent,FullHttpRequest把兩者合在一起了,Netty不熟悉就是容易出錯。