Created
October 21, 2013 20:07
-
-
Save itzg/7090082 to your computer and use it in GitHub Desktop.
Just enough Groovy code to implement a GET'able HTTP server with regex based path routing.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import org.jboss.netty.bootstrap.ServerBootstrap | |
| import org.jboss.netty.buffer.ChannelBuffers | |
| import org.jboss.netty.channel.ChannelHandlerContext | |
| import org.jboss.netty.channel.ChannelPipeline | |
| import org.jboss.netty.channel.ChannelPipelineFactory | |
| import org.jboss.netty.channel.Channels | |
| import org.jboss.netty.channel.MessageEvent | |
| import org.jboss.netty.channel.SimpleChannelUpstreamHandler | |
| import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory | |
| import org.jboss.netty.handler.codec.http.DefaultHttpResponse | |
| import org.jboss.netty.handler.codec.http.HttpHeaders | |
| import org.jboss.netty.handler.codec.http.HttpMethod | |
| import org.jboss.netty.handler.codec.http.HttpRequest | |
| import org.jboss.netty.handler.codec.http.HttpResponse | |
| import org.jboss.netty.handler.codec.http.HttpResponseStatus | |
| import org.jboss.netty.handler.codec.http.HttpServerCodec | |
| import org.jboss.netty.handler.codec.http.HttpVersion | |
| import org.slf4j.Logger | |
| import org.slf4j.LoggerFactory | |
| class SmallServer { | |
| protected static Logger logger = LoggerFactory.getLogger(SmallServer) | |
| protected final routes = [ | |
| '/content.json': { req -> | |
| '{"field":"value"}' | |
| }, | |
| '/': { | |
| """<body> | |
| Success. Here's <a href='/missing'>a link to missing content</a> | |
| </body> | |
| """ | |
| } | |
| ] | |
| protected static HttpResponse createBadResponse(HttpResponseStatus status) { | |
| def response = new DefaultHttpResponse(HttpVersion.HTTP_1_0, status) | |
| response.addHeader(HttpHeaders.Names.CONTENT_LENGTH, 0) | |
| return response | |
| } | |
| int startServer() { | |
| final def us = this | |
| ServerBootstrap serverBootstrap = new ServerBootstrap(new NioServerSocketChannelFactory()) | |
| serverBootstrap.pipelineFactory = new ChannelPipelineFactory() { | |
| ChannelPipeline getPipeline() throws Exception { | |
| Channels.pipeline(new HttpServerCodec(), new SimpleChannelUpstreamHandler() { | |
| void messageReceived(ChannelHandlerContext ctx, MessageEvent evt) throws Exception { | |
| if (evt.message instanceof HttpRequest && evt.message.method == HttpMethod.GET) { | |
| HttpRequest req = evt.message | |
| def routeHandlerEntry = us.routes.find { it.key.isCase(req.uri) } | |
| if (routeHandlerEntry) { | |
| SmallServer.logger.info("Routing ${req.uri}") | |
| def response = new DefaultHttpResponse(HttpVersion.HTTP_1_0, HttpResponseStatus.OK) | |
| try { | |
| def stringContent = routeHandlerEntry.value.call(req) | |
| def content = ChannelBuffers.copiedBuffer(stringContent, Charset.forName('UTF-8')) | |
| response.content = content | |
| response.addHeader(HttpHeaders.Names.CONTENT_LENGTH, content.readableBytes()) | |
| if (stringContent[0] in ['<']) { | |
| response.addHeader(HttpHeaders.Names.CONTENT_TYPE, 'text/html') | |
| } | |
| else if (stringContent[0] in ['[','{']) { | |
| response.addHeader(HttpHeaders.Names.CONTENT_TYPE, 'application/json') | |
| } | |
| evt.channel.write(response) | |
| } | |
| catch (Exception e) { | |
| SmallServer.logger.error("Handler ${req.uri} failed", e) | |
| evt.channel.write(createBadResponse(HttpResponseStatus.INTERNAL_SERVER_ERROR)) | |
| } | |
| } | |
| else { | |
| SmallServer.logger.warn("Not found: ${req.uri}") | |
| evt.channel.write(createBadResponse(HttpResponseStatus.NOT_FOUND)) | |
| } | |
| } | |
| else { | |
| SmallServer.logger.warn("Bad request: ${req}") | |
| evt.channel.write(createBadResponse(HttpResponseStatus.BAD_REQUEST)) | |
| } | |
| } | |
| }) | |
| } | |
| } | |
| def serverPort = serverBootstrap.bind(new InetSocketAddress(0)).localAddress.port | |
| println "Server is ready at http://localhost:${serverPort}" | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Hi, what would be @grab()
?