Examples with HEAD javax.ws.rs.HttpMethod.HEAD used on opensource projects

Example 1 with HEAD

use of javax.ws.rs.HttpMethod.HEAD in project servicetalk by apple.

the class DefaultContainerResponseWriter method sendResponse.

private void sendResponse(final long contentLength, @Nullable final Publisher<Buffer> content, final ContainerResponse containerResponse) {
    final HttpResponseStatus status = getStatus(containerResponse);
    final StreamingHttpResponse response;
    if (content != null && !isHeadRequest()) {
        final HttpExecutionStrategy executionStrategy = getResponseExecutionStrategy(request);
        // TODO(scott): use request factory methods that accept a payload body to avoid overhead of payloadBody.
        final Publisher<Buffer> payloadBody = (executionStrategy != null && executionStrategy.isSendOffloaded() ? content.subscribeOn(serviceCtx.executionContext().executor(), IoThreadFactory.IoThread::currentThreadIsIoThread) : content).beforeCancel(// Cleanup internal state if server cancels response body
        this::cancelResponse);
        response = responseFactory.newResponse(status).version(protocolVersion).payloadBody(payloadBody);
    } else {
        response = responseFactory.newResponse(status).version(protocolVersion);
    }
    final HttpHeaders headers = response.headers();
    // If we use HTTP/2 protocol all headers MUST be in lower case
    final boolean isH2 = response.version().major() == 2;
    containerResponse.getHeaders().forEach((k, vs) -> vs.forEach(v -> {
        headers.add(isH2 ? k.toLowerCase() : k, v == null ? emptyAsciiString() : asCharSequence(v));
    }));
    if (!headers.contains(CONTENT_LENGTH)) {
        if (contentLength == UNKNOWN_RESPONSE_LENGTH) {
            // We can omit Transfer-Encoding for HEAD per https://tools.ietf.org/html/rfc7231#section-4.3.2
            if (!isHeadRequest() && !HTTP_1_0.equals(protocolVersion)) {
                headers.set(TRANSFER_ENCODING, CHUNKED);
            }
        } else {
            headers.set(CONTENT_LENGTH, contentLength == 0 ? ZERO : Long.toString(contentLength));
            headers.removeIgnoreCase(TRANSFER_ENCODING, CHUNKED);
        }
    }
    responseSubscriber.onSuccess(response);
}

Example 2 with HEAD

use of javax.ws.rs.HttpMethod.HEAD in project trellis by trellis-ldp.

the class MementoResource method getTimeMapBuilder.

/**
 * Create a response builder for a TimeMap response.
 *
 * @param mementos the mementos
 * @param baseUrl the base URL
 * @param req the LDP request
 * @return a response builder object
 */
public ResponseBuilder getTimeMapBuilder(final SortedSet<Instant> mementos, final TrellisRequest req, final String baseUrl) {
    final List<MediaType> acceptableTypes = req.getAcceptableMediaTypes();
    final String identifier = HttpUtils.buildResourceUrl(req, baseUrl);
    final List<Link> allLinks = getMementoLinks(identifier, mementos).collect(toList());
    final ResponseBuilder builder = ok().link(identifier, ORIGINAL + " " + TIMEGATE);
    builder.links(getMementoHeaders(identifier, mementos).map(this::filterLinkParams).toArray(Link[]::new)).link(Resource.getIRIString(), TYPE).link(RDFSource.getIRIString(), TYPE).header(ALLOW, join(",", GET, HEAD, OPTIONS));
    final RDFSyntax syntax = getSyntax(trellis.getIOService(), acceptableTypes, APPLICATION_LINK_FORMAT);
    if (syntax != null) {
        final IRI profile = getProfile(acceptableTypes, syntax);
        final IRI jsonldProfile = profile != null ? profile : compacted;
        return builder.type(syntax.mediaType()).entity((StreamingOutput) out -> trellis.getIOService().write(trellis.getTimemapGenerator().asRdf(identifier, allLinks), out, syntax, baseUrl, jsonldProfile));
    }
    return builder.type(APPLICATION_LINK_FORMAT).entity(allLinks.stream().map(this::filterLinkParams).map(Link::toString).collect(joining(",\n")) + "\n");
}

Example 3 with HEAD

use of javax.ws.rs.HttpMethod.HEAD in project trellis by trellis-ldp.

the class GetHandler method getLdpNr.

private CompletionStage<ResponseBuilder> getLdpNr(final ResponseBuilder builder) {
    final EntityTag etag = generateEtag(getResource().getRevision());
    checkCache(getResource().getModified(), etag);
    final IRI dsid = getResource().getBinaryMetadata().map(BinaryMetadata::getIdentifier).orElse(null);
    // Add standard headers
    builder.header(ACCEPT_RANGES, "bytes").tag(etag);
    addAllowHeaders(builder);
    // Short circuit HEAD requests
    if (HEAD.equals(getRequest().getMethod())) {
        return completedFuture(builder);
    }
    // Stream the binary content
    return getBinaryStream(dsid, getRequest()).thenApply(in -> (StreamingOutput) out -> copy(in, out)).thenApply(builder::entity);
}

Example 4 with HEAD

use of javax.ws.rs.HttpMethod.HEAD in project trellis by trellis-ldp.

the class GetHandler method getLdpRs.

private ResponseBuilder getLdpRs(final ResponseBuilder builder, final RDFSyntax syntax, final IRI profile) {
    final Prefer prefer = getRequest().getPrefer();
    // Check for a cache hit
    if (!RDFSyntax.RDFA.equals(syntax)) {
        final EntityTag etag = generateEtag(getResource().getRevision(), weakEtags);
        checkCache(getResource().getModified(), etag);
        builder.tag(etag);
    }
    addAllowHeaders(builder);
    if (prefer != null) {
        builder.header(PREFERENCE_APPLIED, PREFER_RETURN + "=" + prefer.getPreference().orElse(PREFER_REPRESENTATION));
        if (prefer.getPreference().filter(PREFER_MINIMAL::equals).isPresent()) {
            return builder.status(NO_CONTENT);
        }
    }
    // Short circuit HEAD requests
    if (HEAD.equals(getRequest().getMethod())) {
        return builder;
    }
    // Stream the rdf content
    return builder.entity((StreamingOutput) out -> {
        try (final Stream<Quad> stream = getResource().stream(getPreferredGraphs(prefer))) {
            getServices().getIOService().write(stream.map(Quad::asTriple).map(unskolemizeTriples(getServices().getResourceService(), getBaseUrl())), out, syntax, getIdentifier(), getJsonLdProfile(profile, syntax));
        }
    });
}