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94 lines
3.6 KiB
Java
94 lines
3.6 KiB
Java
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/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package ch.boye.httpclientandroidlib.protocol;
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import java.io.IOException;
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import ch.boye.httpclientandroidlib.HttpEntity;
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import ch.boye.httpclientandroidlib.HttpEntityEnclosingRequest;
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import ch.boye.httpclientandroidlib.HttpException;
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import ch.boye.httpclientandroidlib.HttpRequest;
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import ch.boye.httpclientandroidlib.HttpRequestInterceptor;
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import ch.boye.httpclientandroidlib.HttpVersion;
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import ch.boye.httpclientandroidlib.ProtocolVersion;
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import ch.boye.httpclientandroidlib.annotation.Immutable;
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import ch.boye.httpclientandroidlib.params.CoreProtocolPNames;
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import ch.boye.httpclientandroidlib.util.Args;
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/**
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* RequestExpectContinue is responsible for enabling the 'expect-continue'
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* handshake by adding <code>Expect</code> header. This interceptor is
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* recommended for client side protocol processors.
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*
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* @since 4.0
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*/
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@Immutable
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@SuppressWarnings("deprecation")
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public class RequestExpectContinue implements HttpRequestInterceptor {
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private final boolean activeByDefault;
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/**
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* @deprecated (4.3) use {@link ch.boye.httpclientandroidlib.protocol.RequestExpectContinue#RequestExpectContinue(boolean)}
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*/
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@Deprecated
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public RequestExpectContinue() {
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this(false);
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}
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/**
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* @since 4.3
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*/
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public RequestExpectContinue(final boolean activeByDefault) {
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super();
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this.activeByDefault = activeByDefault;
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}
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public void process(final HttpRequest request, final HttpContext context)
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throws HttpException, IOException {
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Args.notNull(request, "HTTP request");
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if (!request.containsHeader(HTTP.EXPECT_DIRECTIVE)) {
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if (request instanceof HttpEntityEnclosingRequest) {
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final ProtocolVersion ver = request.getRequestLine().getProtocolVersion();
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final HttpEntity entity = ((HttpEntityEnclosingRequest)request).getEntity();
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// Do not send the expect header if request body is known to be empty
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if (entity != null
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&& entity.getContentLength() != 0 && !ver.lessEquals(HttpVersion.HTTP_1_0)) {
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final boolean active = request.getParams().getBooleanParameter(
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CoreProtocolPNames.USE_EXPECT_CONTINUE, this.activeByDefault);
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if (active) {
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request.addHeader(HTTP.EXPECT_DIRECTIVE, HTTP.EXPECT_CONTINUE);
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}
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}
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}
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}
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}
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}
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