mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/entity/LaxContentLengthStrategy.java@6474c204b198 (annotated)
mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/entity/LaxContentLengthStrategy.java
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* |
| michael@0 | 2 | * ==================================================================== |
| michael@0 | 3 | * Licensed to the Apache Software Foundation (ASF) under one |
| michael@0 | 4 | * or more contributor license agreements. See the NOTICE file |
| michael@0 | 5 | * distributed with this work for additional information |
| michael@0 | 6 | * regarding copyright ownership. The ASF licenses this file |
| michael@0 | 7 | * to you under the Apache License, Version 2.0 (the |
| michael@0 | 8 | * "License"); you may not use this file except in compliance |
| michael@0 | 9 | * with the License. You may obtain a copy of the License at |
| michael@0 | 10 | * |
| michael@0 | 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
| michael@0 | 12 | * |
| michael@0 | 13 | * Unless required by applicable law or agreed to in writing, |
| michael@0 | 14 | * software distributed under the License is distributed on an |
| michael@0 | 15 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| michael@0 | 16 | * KIND, either express or implied. See the License for the |
| michael@0 | 17 | * specific language governing permissions and limitations |
| michael@0 | 18 | * under the License. |
| michael@0 | 19 | * ==================================================================== |
| michael@0 | 20 | * |
| michael@0 | 21 | * This software consists of voluntary contributions made by many |
| michael@0 | 22 | * individuals on behalf of the Apache Software Foundation. For more |
| michael@0 | 23 | * information on the Apache Software Foundation, please see |
| michael@0 | 24 | * <http://www.apache.org/>. |
| michael@0 | 25 | * |
| michael@0 | 26 | */ |
| michael@0 | 27 | |
| michael@0 | 28 | package ch.boye.httpclientandroidlib.impl.entity; |
| michael@0 | 29 | |
| michael@0 | 30 | import ch.boye.httpclientandroidlib.Header; |
| michael@0 | 31 | import ch.boye.httpclientandroidlib.HeaderElement; |
| michael@0 | 32 | import ch.boye.httpclientandroidlib.HttpException; |
| michael@0 | 33 | import ch.boye.httpclientandroidlib.HttpMessage; |
| michael@0 | 34 | import ch.boye.httpclientandroidlib.ParseException; |
| michael@0 | 35 | import ch.boye.httpclientandroidlib.ProtocolException; |
| michael@0 | 36 | import ch.boye.httpclientandroidlib.entity.ContentLengthStrategy; |
| michael@0 | 37 | import ch.boye.httpclientandroidlib.params.HttpParams; |
| michael@0 | 38 | import ch.boye.httpclientandroidlib.params.CoreProtocolPNames; |
| michael@0 | 39 | import ch.boye.httpclientandroidlib.protocol.HTTP; |
| michael@0 | 40 | |
| michael@0 | 41 | /** |
| michael@0 | 42 | * The lax implementation of the content length strategy. This class will ignore |
| michael@0 | 43 | * unrecognized transfer encodings and malformed <code>Content-Length</code> |
| michael@0 | 44 | * header values if the {@link CoreProtocolPNames#STRICT_TRANSFER_ENCODING} |
| michael@0 | 45 | * parameter of the given message is not set or set to <code>false</code>. |
| michael@0 | 46 | * <p> |
| michael@0 | 47 | * This class recognizes "chunked" and "identitiy" transfer-coding only. |
| michael@0 | 48 | * <p> |
| michael@0 | 49 | * The following parameters can be used to customize the behavior of this class: |
| michael@0 | 50 | * <ul> |
| michael@0 | 51 | * <li>{@link ch.boye.httpclientandroidlib.params.CoreProtocolPNames#STRICT_TRANSFER_ENCODING}</li> |
| michael@0 | 52 | * </ul> |
| michael@0 | 53 | * |
| michael@0 | 54 | * @since 4.0 |
| michael@0 | 55 | */ |
| michael@0 | 56 | public class LaxContentLengthStrategy implements ContentLengthStrategy { |
| michael@0 | 57 | |
| michael@0 | 58 | public LaxContentLengthStrategy() { |
| michael@0 | 59 | super(); |
| michael@0 | 60 | } |
| michael@0 | 61 | |
| michael@0 | 62 | public long determineLength(final HttpMessage message) throws HttpException { |
| michael@0 | 63 | if (message == null) { |
| michael@0 | 64 | throw new IllegalArgumentException("HTTP message may not be null"); |
| michael@0 | 65 | } |
| michael@0 | 66 | |
| michael@0 | 67 | HttpParams params = message.getParams(); |
| michael@0 | 68 | boolean strict = params.isParameterTrue(CoreProtocolPNames.STRICT_TRANSFER_ENCODING); |
| michael@0 | 69 | |
| michael@0 | 70 | Header transferEncodingHeader = message.getFirstHeader(HTTP.TRANSFER_ENCODING); |
| michael@0 | 71 | Header contentLengthHeader = message.getFirstHeader(HTTP.CONTENT_LEN); |
| michael@0 | 72 | // We use Transfer-Encoding if present and ignore Content-Length. |
| michael@0 | 73 | // RFC2616, 4.4 item number 3 |
| michael@0 | 74 | if (transferEncodingHeader != null) { |
| michael@0 | 75 | HeaderElement[] encodings = null; |
| michael@0 | 76 | try { |
| michael@0 | 77 | encodings = transferEncodingHeader.getElements(); |
| michael@0 | 78 | } catch (ParseException px) { |
| michael@0 | 79 | throw new ProtocolException |
| michael@0 | 80 | ("Invalid Transfer-Encoding header value: " + |
| michael@0 | 81 | transferEncodingHeader, px); |
| michael@0 | 82 | } |
| michael@0 | 83 | if (strict) { |
| michael@0 | 84 | // Currently only chunk and identity are supported |
| michael@0 | 85 | for (int i = 0; i < encodings.length; i++) { |
| michael@0 | 86 | String encoding = encodings[i].getName(); |
| michael@0 | 87 | if (encoding != null && encoding.length() > 0 |
| michael@0 | 88 | && !encoding.equalsIgnoreCase(HTTP.CHUNK_CODING) |
| michael@0 | 89 | && !encoding.equalsIgnoreCase(HTTP.IDENTITY_CODING)) { |
| michael@0 | 90 | throw new ProtocolException("Unsupported transfer encoding: " + encoding); |
| michael@0 | 91 | } |
| michael@0 | 92 | } |
| michael@0 | 93 | } |
| michael@0 | 94 | // The chunked encoding must be the last one applied RFC2616, 14.41 |
| michael@0 | 95 | int len = encodings.length; |
| michael@0 | 96 | if (HTTP.IDENTITY_CODING.equalsIgnoreCase(transferEncodingHeader.getValue())) { |
| michael@0 | 97 | return IDENTITY; |
| michael@0 | 98 | } else if ((len > 0) && (HTTP.CHUNK_CODING.equalsIgnoreCase( |
| michael@0 | 99 | encodings[len - 1].getName()))) { |
| michael@0 | 100 | return CHUNKED; |
| michael@0 | 101 | } else { |
| michael@0 | 102 | if (strict) { |
| michael@0 | 103 | throw new ProtocolException("Chunk-encoding must be the last one applied"); |
| michael@0 | 104 | } |
| michael@0 | 105 | return IDENTITY; |
| michael@0 | 106 | } |
| michael@0 | 107 | } else if (contentLengthHeader != null) { |
| michael@0 | 108 | long contentlen = -1; |
| michael@0 | 109 | Header[] headers = message.getHeaders(HTTP.CONTENT_LEN); |
| michael@0 | 110 | if (strict && headers.length > 1) { |
| michael@0 | 111 | throw new ProtocolException("Multiple content length headers"); |
| michael@0 | 112 | } |
| michael@0 | 113 | for (int i = headers.length - 1; i >= 0; i--) { |
| michael@0 | 114 | Header header = headers[i]; |
| michael@0 | 115 | try { |
| michael@0 | 116 | contentlen = Long.parseLong(header.getValue()); |
| michael@0 | 117 | break; |
| michael@0 | 118 | } catch (NumberFormatException e) { |
| michael@0 | 119 | if (strict) { |
| michael@0 | 120 | throw new ProtocolException("Invalid content length: " + header.getValue()); |
| michael@0 | 121 | } |
| michael@0 | 122 | } |
| michael@0 | 123 | // See if we can have better luck with another header, if present |
| michael@0 | 124 | } |
| michael@0 | 125 | if (contentlen >= 0) { |
| michael@0 | 126 | return contentlen; |
| michael@0 | 127 | } else { |
| michael@0 | 128 | return IDENTITY; |
| michael@0 | 129 | } |
| michael@0 | 130 | } else { |
| michael@0 | 131 | return IDENTITY; |
| michael@0 | 132 | } |
| michael@0 | 133 | } |
| michael@0 | 134 | |
| michael@0 | 135 | } |
