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A bundle project producing JAX-RS RI bundles. The primary artifact is an "all-in-one" OSGi-fied JAX-RS RI bundle (jaxrs-ri.jar). Attached to that are two compressed JAX-RS RI archives. The first archive (jaxrs-ri.zip) consists of binary RI bits and contains the API jar (under "api" directory), RI libraries (under "lib" directory) as well as all external RI dependencies (under "ext" directory). The secondary archive (jaxrs-ri-src.zip) contains buildable JAX-RS RI source bundle and contains the API jar (under "api" directory), RI sources (under "src" directory) as well as all external RI dependencies (under "ext" directory). The second archive also contains "build.xml" ANT script that builds the RI sources. To build the JAX-RS RI simply unzip the archive, cd to the created jaxrs-ri directory and invoke "ant" from the command line.

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/*
 * Copyright (c) 2022 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.glassfish.jersey.client.innate;

import org.glassfish.jersey.client.ClientProperties;
import org.glassfish.jersey.client.ClientRequest;
import org.glassfish.jersey.client.RequestEntityProcessing;

/**
 * Utility class to check whether it's possible to send the Expect header within request.
 */
public final class Expect100ContinueUsage {

    private Expect100ContinueUsage() {
        //do not instantiate
    }

    /**
     * Checks if usage of the Expect header with 100-Continue value is allowed
     *
     * @param request client's request
     * @param requestMethod method of the request (GET, POST, PUT etc).
     * @return true if the Expect header is allowed.
     */
    public static boolean isAllowed(ClientRequest request, String requestMethod) {

        long requestLength = request.getLengthLong();

        final RequestEntityProcessing entityProcessing = request.resolveProperty(
                ClientProperties.REQUEST_ENTITY_PROCESSING, RequestEntityProcessing.class);

        final Boolean expectContinueActivated = request.resolveProperty(
                ClientProperties.EXPECT_100_CONTINUE, Boolean.class);
        final Long expectContinueSizeThreshold = request.resolveProperty(
                ClientProperties.EXPECT_100_CONTINUE_THRESHOLD_SIZE,
                ClientProperties.DEFAULT_EXPECT_100_CONTINUE_THRESHOLD_SIZE);

        final boolean allowStreaming = requestLength > expectContinueSizeThreshold
                || entityProcessing == RequestEntityProcessing.CHUNKED;

        return !(!Boolean.TRUE.equals(expectContinueActivated)
                || !("POST".equals(requestMethod) || "PUT".equals(requestMethod))
                || !allowStreaming
        );
    }
}