Vert.x Web FailureHandler reroute to index.html

[Denis Ivanov]

Hi there!

I have a single page app on angularjs. It has a lot internal URL for routing inside the app. When I copy some nonexistent URL and GET it server should send me an index.html page. After that client sinde app parse URL and do some work.

On a server side I have StatisHandler:

// static handler
router.route().handler(
    StaticHandler
        .create()
        .setWebRoot("webroot")
        .setCachingEnabled(true)
);
// and default page
router.get("/").handler(
    routingContext -> {
        routingContext.response()
            .putHeader("content-type","text/html")
            .putHeader("Cache-Control","max-age=864000") // 10 Days Caching
            .putHeader("accept-encoding","gzip, deflate")
            .sendFile("index.html");
    }
);

I'd like to send index.html in response without changing URL.

I tried this:

router.route("/*").handler(Hdl -> {
    System.out.println("rerouted");
    Hdl.reroute("/");
});

looks like recursive error and I have to stop this process manually:

java.lang.StackOverflowError

        at java.security.AccessController.doPrivileged(Native Method)

        at java.io.PrintWriter.<init>(PrintWriter.java:116)

        at java.io.PrintWriter.<init>(PrintWriter.java:100)

        at java.util.logging.SimpleFormatter.format(SimpleFormatter.java:155)

        at java.util.logging.StreamHandler.publish(StreamHandler.java:211)

        at java.util.logging.ConsoleHandler.publish(ConsoleHandler.java:116)

        at java.util.logging.Logger.log(Logger.java:738)

        at io.vertx.core.logging.JULLogDelegate.log(JULLogDelegate.java:162)

        at io.vertx.core.logging.JULLogDelegate.log(JULLogDelegate.java:166)

        at io.vertx.core.logging.JULLogDelegate.error(JULLogDelegate.java:66)

        at io.vertx.core.logging.Logger.error(Logger.java:70)

        at io.vertx.ext.web.impl.RoutingContextImplBase.unhandledFailure(RoutingContextImplBase.java:106)

        at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:88)

        at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:93)

        at io.vertx.ext.web.impl.RoutingContextImplBase.restart(RoutingContextImplBase.java:63)

        at io.vertx.ext.web.impl.RoutingContextImpl.reroute(RoutingContextImpl.java:279)

        at io.vertx.ext.web.RoutingContext.reroute(RoutingContext.java:355)

        at TestWebServer.lambda$start$0(TestWebServer.java:32)

        at io.vertx.ext.web.impl.RouteImpl.handleFailure(RouteImpl.java:227)

        at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:76)

        at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:93)

        at io.vertx.ext.web.impl.RoutingContextImplBase.restart(RoutingContextImplBase.java:63)

        at io.vertx.ext.web.impl.RoutingContextImpl.reroute(RoutingContextImpl.java:279)

        at io.vertx.ext.web.RoutingContext.reroute(RoutingContext.java:355)

I checked this version:

router.route("/*").failureHandler(fHdl -> {
    fHdl.response()
        .putHeader("content-type","text/html")
        .putHeader("Cache-Control","max-age=864000") // 10 Days Caching
        .putHeader("accept-encoding","gzip, deflate")
        .sendFile("webroot/index.html");
});

It works. Browser receives index.html page but it generates an exception on the server without stopping webserver. It continues working...

Unexpected exception in route

java.lang.IllegalStateException: Response has already been written

        at io.vertx.core.http.impl.HttpServerResponseImpl.checkWritten(HttpServerResponseImpl.java:561)

        at io.vertx.core.http.impl.HttpServerResponseImpl.putHeader(HttpServerResponseImpl.java:154)

        at io.vertx.core.http.impl.HttpServerResponseImpl.putHeader(HttpServerResponseImpl.java:52)

        at TestWebServer.lambda$start$0(TestWebServer.java:33)

        at io.vertx.ext.web.impl.RouteImpl.handleFailure(RouteImpl.java:227)

        at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:76)

        at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:93)

        at io.vertx.ext.web.impl.RoutingContextImpl.doFail(RoutingContextImpl.java:349)

        at io.vertx.ext.web.impl.RoutingContextImpl.fail(RoutingContextImpl.java:118)

        at io.vertx.ext.web.handler.impl.StaticHandlerImpl.lambda$sendStatic$2(StaticHandlerImpl.java:189)

        at io.vertx.ext.web.handler.impl.StaticHandlerImpl.getFileProps(StaticHandlerImpl.java:284)

        at io.vertx.ext.web.handler.impl.StaticHandlerImpl.sendStatic(StaticHandlerImpl.java:184)

        at io.vertx.ext.web.handler.impl.StaticHandlerImpl.handle(StaticHandlerImpl.java:141)

        at io.vertx.ext.web.handler.impl.StaticHandlerImpl.handle(StaticHandlerImpl.java:51)

        at io.vertx.ext.web.impl.RouteImpl.handleContext(RouteImpl.java:221)

        at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:78)

        at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:93)

        at io.vertx.ext.web.impl.RouterImpl.accept(RouterImpl.java:79)

        at io.vertx.core.http.impl.ServerConnection.handleRequest(ServerConnection.java:274)

        at io.vertx.core.http.impl.ServerConnection.processMessage(ServerConnection.java:392)

        at io.vertx.core.http.impl.ServerConnection.handleMessage(ServerConnection.java:134)

        at io.vertx.core.http.impl.HttpServerImpl$ServerHandler.doMessageReceived(HttpServerImpl.java:471)

        at io.vertx.core.http.impl.HttpServerImpl$ServerHandler.doMessageReceived(HttpServerImpl.java:420)

        at io.vertx.core.http.impl.VertxHttpHandler.lambda$channelRead$18(VertxHttpHandler.java:80)

        at io.vertx.core.impl.ContextImpl.lambda$wrapTask$16(ContextImpl.java:333)

        at io.vertx.core.impl.ContextImpl.executeFromIO(ContextImpl.java:225)

        at io.vertx.core.http.impl.VertxHttpHandler.channelRead(VertxHttpHandler.java:80)

        at io.vertx.core.net.impl.VertxHandler.channelRead(VertxHandler.java:124)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)

        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)

        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:276)

        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:263)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)

        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)

        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:846)

        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)

        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)

        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)

        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)

        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)

        at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112)

        at java.lang.Thread.run(Thread.java:745)