1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/entity/LaxContentLengthStrategy.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,135 @@
1.4 +/*
1.5 + * ====================================================================
1.6 + * Licensed to the Apache Software Foundation (ASF) under one
1.7 + * or more contributor license agreements. See the NOTICE file
1.8 + * distributed with this work for additional information
1.9 + * regarding copyright ownership. The ASF licenses this file
1.10 + * to you under the Apache License, Version 2.0 (the
1.11 + * "License"); you may not use this file except in compliance
1.12 + * with the License. You may obtain a copy of the License at
1.13 + *
1.14 + * http://www.apache.org/licenses/LICENSE-2.0
1.15 + *
1.16 + * Unless required by applicable law or agreed to in writing,
1.17 + * software distributed under the License is distributed on an
1.18 + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
1.19 + * KIND, either express or implied. See the License for the
1.20 + * specific language governing permissions and limitations
1.21 + * under the License.
1.22 + * ====================================================================
1.23 + *
1.24 + * This software consists of voluntary contributions made by many
1.25 + * individuals on behalf of the Apache Software Foundation. For more
1.26 + * information on the Apache Software Foundation, please see
1.27 + * <http://www.apache.org/>.
1.28 + *
1.29 + */
1.30 +
1.31 +package ch.boye.httpclientandroidlib.impl.entity;
1.32 +
1.33 +import ch.boye.httpclientandroidlib.Header;
1.34 +import ch.boye.httpclientandroidlib.HeaderElement;
1.35 +import ch.boye.httpclientandroidlib.HttpException;
1.36 +import ch.boye.httpclientandroidlib.HttpMessage;
1.37 +import ch.boye.httpclientandroidlib.ParseException;
1.38 +import ch.boye.httpclientandroidlib.ProtocolException;
1.39 +import ch.boye.httpclientandroidlib.entity.ContentLengthStrategy;
1.40 +import ch.boye.httpclientandroidlib.params.HttpParams;
1.41 +import ch.boye.httpclientandroidlib.params.CoreProtocolPNames;
1.42 +import ch.boye.httpclientandroidlib.protocol.HTTP;
1.43 +
1.44 +/**
1.45 + * The lax implementation of the content length strategy. This class will ignore
1.46 + * unrecognized transfer encodings and malformed <code>Content-Length</code>
1.47 + * header values if the {@link CoreProtocolPNames#STRICT_TRANSFER_ENCODING}
1.48 + * parameter of the given message is not set or set to <code>false</code>.
1.49 + * <p>
1.50 + * This class recognizes "chunked" and "identitiy" transfer-coding only.
1.51 + * <p>
1.52 + * The following parameters can be used to customize the behavior of this class:
1.53 + * <ul>
1.54 + * <li>{@link ch.boye.httpclientandroidlib.params.CoreProtocolPNames#STRICT_TRANSFER_ENCODING}</li>
1.55 + * </ul>
1.56 + *
1.57 + * @since 4.0
1.58 + */
1.59 +public class LaxContentLengthStrategy implements ContentLengthStrategy {
1.60 +
1.61 + public LaxContentLengthStrategy() {
1.62 + super();
1.63 + }
1.64 +
1.65 + public long determineLength(final HttpMessage message) throws HttpException {
1.66 + if (message == null) {
1.67 + throw new IllegalArgumentException("HTTP message may not be null");
1.68 + }
1.69 +
1.70 + HttpParams params = message.getParams();
1.71 + boolean strict = params.isParameterTrue(CoreProtocolPNames.STRICT_TRANSFER_ENCODING);
1.72 +
1.73 + Header transferEncodingHeader = message.getFirstHeader(HTTP.TRANSFER_ENCODING);
1.74 + Header contentLengthHeader = message.getFirstHeader(HTTP.CONTENT_LEN);
1.75 + // We use Transfer-Encoding if present and ignore Content-Length.
1.76 + // RFC2616, 4.4 item number 3
1.77 + if (transferEncodingHeader != null) {
1.78 + HeaderElement[] encodings = null;
1.79 + try {
1.80 + encodings = transferEncodingHeader.getElements();
1.81 + } catch (ParseException px) {
1.82 + throw new ProtocolException
1.83 + ("Invalid Transfer-Encoding header value: " +
1.84 + transferEncodingHeader, px);
1.85 + }
1.86 + if (strict) {
1.87 + // Currently only chunk and identity are supported
1.88 + for (int i = 0; i < encodings.length; i++) {
1.89 + String encoding = encodings[i].getName();
1.90 + if (encoding != null && encoding.length() > 0
1.91 + && !encoding.equalsIgnoreCase(HTTP.CHUNK_CODING)
1.92 + && !encoding.equalsIgnoreCase(HTTP.IDENTITY_CODING)) {
1.93 + throw new ProtocolException("Unsupported transfer encoding: " + encoding);
1.94 + }
1.95 + }
1.96 + }
1.97 + // The chunked encoding must be the last one applied RFC2616, 14.41
1.98 + int len = encodings.length;
1.99 + if (HTTP.IDENTITY_CODING.equalsIgnoreCase(transferEncodingHeader.getValue())) {
1.100 + return IDENTITY;
1.101 + } else if ((len > 0) && (HTTP.CHUNK_CODING.equalsIgnoreCase(
1.102 + encodings[len - 1].getName()))) {
1.103 + return CHUNKED;
1.104 + } else {
1.105 + if (strict) {
1.106 + throw new ProtocolException("Chunk-encoding must be the last one applied");
1.107 + }
1.108 + return IDENTITY;
1.109 + }
1.110 + } else if (contentLengthHeader != null) {
1.111 + long contentlen = -1;
1.112 + Header[] headers = message.getHeaders(HTTP.CONTENT_LEN);
1.113 + if (strict && headers.length > 1) {
1.114 + throw new ProtocolException("Multiple content length headers");
1.115 + }
1.116 + for (int i = headers.length - 1; i >= 0; i--) {
1.117 + Header header = headers[i];
1.118 + try {
1.119 + contentlen = Long.parseLong(header.getValue());
1.120 + break;
1.121 + } catch (NumberFormatException e) {
1.122 + if (strict) {
1.123 + throw new ProtocolException("Invalid content length: " + header.getValue());
1.124 + }
1.125 + }
1.126 + // See if we can have better luck with another header, if present
1.127 + }
1.128 + if (contentlen >= 0) {
1.129 + return contentlen;
1.130 + } else {
1.131 + return IDENTITY;
1.132 + }
1.133 + } else {
1.134 + return IDENTITY;
1.135 + }
1.136 + }
1.137 +
1.138 +}
