Default error handling

When a route action throws an exception, the server prints an html page with the error’s stack-trace with an internal server error 500 status code.

import topinambur.http

@Test
fun `default error handling`() {
    HttpServer {
        get("/foo") { _, _ -> throw RuntimeException() }
        get("/bar") { _, res -> res.write("Hello")}
    }.start().use {
        assertThat("http://localhost:4545/foo".http.get().statusCode).isEqualTo(INTERNAL_SERVER_ERROR_500)
        assertThat("http://localhost:4545/foo".http.get().body).contains("<h3>Caused by:</h3><pre>java.lang.RuntimeException")
    }
}

Override default error handling

In the example below when you make a request to /foo the servers prints the stackTrace to the standard error, and responds with a 500 status code with an empty body.

import topinambur.http

@Test
fun `overrides default error handling`() {
    HttpServer {
        exception(RuntimeException::class.java) { req, res, exception ->
            exception.printStackTrace()
            res.status(INTERNAL_SERVER_ERROR_500)
        }
        get("/foo") { _, _ -> throw RuntimeException() }
        get("/bar") { _, res -> res.write("Hello")}
    }.start().use {
        assertThat("http://localhost:4545/foo".http.get().statusCode).isEqualTo(INTERNAL_SERVER_ERROR_500)
        assertThat("http://localhost:4545/foo".http.get().body).isEqualTo("")
    }
}