Apache Camel - Netty Http File Provider

原始需求是要提供遠端存取檔案，而又不想架一個http server。剛好看到可以透過Netty Http元件簡單達到此目的，所以也試驗了一下。

java

	public static class FileProvider {
		public static File provide(Exchange exchange){
			NettyHttpMessage message = exchange.getIn().getBody(NettyHttpMessage.class);
			HttpRequest request = message.getHttpRequest();
			System.out.println(request.getUri());
 
			String uri = request.getUri();
			File file = new File(uri);
 
			file = new File("./", file.getName());
			if( file.exists() )
				return file;
 
			exchange.getOut().setHeader(Exchange.HTTP_RESPONSE_CODE, 404);
			return null;
		}
	}
 
	@Test
	public void test() throws Exception {
 
		CamelContext context = new DefaultCamelContext();
		try {
			context.addRoutes(new RouteBuilder() {
				@Override
				public void configure() throws Exception {
					String uri = "netty-http:http://0.0.0.0:8080/?sync=true&matchOnUriPrefix=true";
					from(uri).bean(FileProvider.class, "provide");
				}
			});
 
			context.start();
 
			System.out.println("Enter");
			Scanner s = new Scanner(System.in);
			s.next();
			s.close();
		} finally {
			context.stop();
		}
	}

ivy.xml dependency

	<dependency org="org.apache.camel" name="camel-netty" rev="latest.integration"/>
	<dependency org="org.apache.camel" name="camel-netty-http" rev="latest.integration"/>
	<dependency org="io.netty" name="netty" rev="latest.integration"/>
	<dependency org="org.apache.camel" name="camel-core" rev="latest.integration"/>

Reference

• Apache Camel: Syslog
• Apache Camel: Netty
• Apache Camel: Netty Http