【发布时间】：2015-01-19 17:19:17
【问题描述】：
我正在使用 httpcomponenets nio 服务器来处理发布请求。
以下是示例代码。它使用 EntityUtils.toByteArray() 获取字节数组中的完整数据。如果请求者发送一个大文件，这将失败。
我不知道如何分块读取请求中的数据。 HttpEntity.getContent().read() 总是返回 null
public static void main(String[] args) throws Exception {
int port = 8280;
// Create HTTP protocol processing chain
HttpProcessor httpproc = HttpProcessorBuilder.create()
.add(new ResponseDate())
.add(new ResponseServer("Test/1.1"))
.add(new ResponseContent())
.add(new ResponseConnControl()).build();
// Create request handler registry
UriHttpAsyncRequestHandlerMapper reqistry = new UriHttpAsyncRequestHandlerMapper();
// Register the default handler for all URIs
reqistry.register("/test*", new RequestHandler());
// Create server-side HTTP protocol handler
HttpAsyncService protocolHandler = new HttpAsyncService(httpproc, reqistry) {
@Override
public void connected(final NHttpServerConnection conn) {
System.out.println(conn + ": connection open");
super.connected(conn);
}
@Override
public void closed(final NHttpServerConnection conn) {
System.out.println(conn + ": connection closed");
super.closed(conn);
}
};
// Create HTTP connection factory
NHttpConnectionFactory<DefaultNHttpServerConnection> connFactory;
connFactory = new DefaultNHttpServerConnectionFactory(
ConnectionConfig.DEFAULT);
// Create server-side I/O event dispatch
IOEventDispatch ioEventDispatch = new DefaultHttpServerIODispatch(protocolHandler, connFactory);
// Set I/O reactor defaults
IOReactorConfig config = IOReactorConfig.custom()
.setIoThreadCount(1)
.setSoTimeout(3000)
.setConnectTimeout(3000)
.build();
// Create server-side I/O reactor
ListeningIOReactor ioReactor = new DefaultListeningIOReactor(config);
try {
// Listen of the given port
ioReactor.listen(new InetSocketAddress(port));
// Ready to go!
ioReactor.execute(ioEventDispatch);
} catch (InterruptedIOException ex) {
System.err.println("Interrupted");
} catch (IOException e) {
System.err.println("I/O error: " + e.getMessage());
}
System.out.println("Shutdown");
}
public static class RequestHandler implements HttpAsyncRequestHandler<HttpRequest> {
public void handleInternal(HttpRequest httpRequest, HttpResponse httpResponse, HttpContext httpContext) throws HttpException, IOException {
HttpEntity entity = null;
if (httpRequest instanceof HttpEntityEnclosingRequest)
entity = ((HttpEntityEnclosingRequest)httpRequest).getEntity();
byte[] data;
if (entity == null) {
data = new byte [0];
} else {
data = EntityUtils.toByteArray(entity);
}
System.out.println(new String(data));
httpResponse.setEntity(new StringEntity("success response"));
}
@Override public HttpAsyncRequestConsumer<HttpRequest> processRequest(HttpRequest request, HttpContext context) throws HttpException, IOException {
return new BasicAsyncRequestConsumer();
}
@Override
public void handle(HttpRequest request, HttpAsyncExchange httpExchange, HttpContext context) throws HttpException, IOException {
HttpResponse response = httpExchange.getResponse();
handleInternal(request, response, context);
httpExchange.submitResponse(new BasicAsyncResponseProducer(response));
}
}
【问题讨论】：