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92 lines
3.7 KiB
Java
92 lines
3.7 KiB
Java
/*
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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.impl.entity;
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import ch.boye.httpclientandroidlib.Header;
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import ch.boye.httpclientandroidlib.HttpException;
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import ch.boye.httpclientandroidlib.HttpMessage;
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import ch.boye.httpclientandroidlib.HttpVersion;
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import ch.boye.httpclientandroidlib.ProtocolException;
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import ch.boye.httpclientandroidlib.entity.ContentLengthStrategy;
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import ch.boye.httpclientandroidlib.protocol.HTTP;
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/**
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* The strict implementation of the content length strategy. This class
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* will throw {@link ProtocolException} if it encounters an unsupported
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* transfer encoding or a malformed <code>Content-Length</code> header
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* value.
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* <p>
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* This class recognizes "chunked" and "identitiy" transfer-coding only.
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*
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* @since 4.0
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*/
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public class StrictContentLengthStrategy implements ContentLengthStrategy {
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public StrictContentLengthStrategy() {
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super();
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}
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public long determineLength(final HttpMessage message) throws HttpException {
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if (message == null) {
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throw new IllegalArgumentException("HTTP message may not be null");
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}
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// Although Transfer-Encoding is specified as a list, in practice
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// it is either missing or has the single value "chunked". So we
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// treat it as a single-valued header here.
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Header transferEncodingHeader = message.getFirstHeader(HTTP.TRANSFER_ENCODING);
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Header contentLengthHeader = message.getFirstHeader(HTTP.CONTENT_LEN);
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if (transferEncodingHeader != null) {
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String s = transferEncodingHeader.getValue();
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if (HTTP.CHUNK_CODING.equalsIgnoreCase(s)) {
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if (message.getProtocolVersion().lessEquals(HttpVersion.HTTP_1_0)) {
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throw new ProtocolException(
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"Chunked transfer encoding not allowed for " +
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message.getProtocolVersion());
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}
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return CHUNKED;
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} else if (HTTP.IDENTITY_CODING.equalsIgnoreCase(s)) {
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return IDENTITY;
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} else {
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throw new ProtocolException(
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"Unsupported transfer encoding: " + s);
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}
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} else if (contentLengthHeader != null) {
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String s = contentLengthHeader.getValue();
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try {
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long len = Long.parseLong(s);
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return len;
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} catch (NumberFormatException e) {
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throw new ProtocolException("Invalid content length: " + s);
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}
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} else {
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return IDENTITY;
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}
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}
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}
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