Examples with TrailersTransformer io.servicetalk.http.api.TrailersTransformer used on opensource projects

Example 1 with TrailersTransformer

use of io.servicetalk.http.api.TrailersTransformer in project servicetalk by apple.

the class ConsumeRequestPayloadOnResponsePathTest method test.

private void test(final BiFunction<Single<StreamingHttpResponse>, StreamingHttpRequest, Single<StreamingHttpResponse>> consumeRequestPayload) throws Exception {
    try (ServerContext serverContext = HttpServers.forAddress(localAddress(0)).appendServiceFilter(service -> new StreamingHttpServiceFilter(service) {

        @Override
        public Single<StreamingHttpResponse> handle(final HttpServiceContext ctx, final StreamingHttpRequest request, final StreamingHttpResponseFactory responseFactory) {
            return consumeRequestPayload.apply(delegate().handle(ctx, request, responseFactory), request);
        }
    }).listenStreamingAndAwait((ctx, request, responseFactory) -> {
        final StreamingHttpResponse response = responseFactory.ok().addHeader(TRAILER, X_TOTAL_LENGTH).payloadBody(from("Response\n", "Payload\n", "Body\n"), appSerializerUtf8FixLen()).transform(new TrailersTransformer<AtomicInteger, Buffer>() {

            @Override
            public AtomicInteger newState() {
                return new AtomicInteger();
            }

            @Override
            public Buffer accept(final AtomicInteger total, final Buffer chunk) {
                total.addAndGet(chunk.readableBytes());
                return chunk;
            }

            @Override
            public HttpHeaders payloadComplete(final AtomicInteger total, final HttpHeaders trailers) {
                trailers.add(X_TOTAL_LENGTH, String.valueOf(total.get()));
                return trailers;
            }

            @Override
            public HttpHeaders catchPayloadFailure(final AtomicInteger __, final Throwable ___, final HttpHeaders trailers) {
                return trailers;
            }
        });
        return succeeded(response);
    })) {
        HttpResponse response;
        try (BlockingHttpClient client = HttpClients.forSingleAddress(AddressUtils.serverHostAndPort(serverContext)).buildBlocking()) {
            response = client.request(client.post("/").payloadBody(EXPECTED_REQUEST_PAYLOAD, textSerializerUtf8()));
            serverLatch.await();
        }
        assertThat(response.status(), is(OK));
        assertThat("Request payload body might be consumed by someone else", errorRef.get(), is(nullValue()));
        assertThat(receivedPayload.toString(), is(EXPECTED_REQUEST_PAYLOAD));
        assertThat(response.headers().contains(TRAILER, X_TOTAL_LENGTH), is(true));
        assertThat(response.trailers().contains(X_TOTAL_LENGTH), is(true));
        CharSequence trailerLength = response.trailers().get(X_TOTAL_LENGTH);
        assertNotNull(trailerLength);
        assertThat("Unexpected response payload: '" + response.payloadBody().toString(UTF_8) + "'", trailerLength.toString(), is(Integer.toString(response.payloadBody().readableBytes())));
    }
}