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Diffstat (limited to 'mobile/android/thirdparty/ch/boye/httpclientandroidlib/client/protocol/ResponseContentEncoding.java')
-rw-r--r-- | mobile/android/thirdparty/ch/boye/httpclientandroidlib/client/protocol/ResponseContentEncoding.java | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/mobile/android/thirdparty/ch/boye/httpclientandroidlib/client/protocol/ResponseContentEncoding.java b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/client/protocol/ResponseContentEncoding.java new file mode 100644 index 000000000..df3ee4457 --- /dev/null +++ b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/client/protocol/ResponseContentEncoding.java @@ -0,0 +1,110 @@ +/* + * ==================================================================== + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + * ==================================================================== + * + * This software consists of voluntary contributions made by many + * individuals on behalf of the Apache Software Foundation. For more + * information on the Apache Software Foundation, please see + * <http://www.apache.org/>. + * + */ +package ch.boye.httpclientandroidlib.client.protocol; + +import java.io.IOException; +import java.util.Locale; + +import ch.boye.httpclientandroidlib.Header; +import ch.boye.httpclientandroidlib.HeaderElement; +import ch.boye.httpclientandroidlib.HttpEntity; +import ch.boye.httpclientandroidlib.HttpException; +import ch.boye.httpclientandroidlib.HttpResponse; +import ch.boye.httpclientandroidlib.HttpResponseInterceptor; +import ch.boye.httpclientandroidlib.annotation.Immutable; +import ch.boye.httpclientandroidlib.client.entity.DeflateDecompressingEntity; +import ch.boye.httpclientandroidlib.client.entity.GzipDecompressingEntity; +import ch.boye.httpclientandroidlib.protocol.HttpContext; + +/** + * {@link HttpResponseInterceptor} responsible for processing Content-Encoding + * responses. + * <p> + * Instances of this class are stateless and immutable, therefore threadsafe. + * + * @since 4.1 + * + */ +@Immutable +public class ResponseContentEncoding implements HttpResponseInterceptor { + + public static final String UNCOMPRESSED = "http.client.response.uncompressed"; + + /** + * Handles the following {@code Content-Encoding}s by + * using the appropriate decompressor to wrap the response Entity: + * <ul> + * <li>gzip - see {@link GzipDecompressingEntity}</li> + * <li>deflate - see {@link DeflateDecompressingEntity}</li> + * <li>identity - no action needed</li> + * </ul> + * + * @param response the response which contains the entity + * @param context not currently used + * + * @throws HttpException if the {@code Content-Encoding} is none of the above + */ + public void process( + final HttpResponse response, + final HttpContext context) throws HttpException, IOException { + final HttpEntity entity = response.getEntity(); + + // entity can be null in case of 304 Not Modified, 204 No Content or similar + // check for zero length entity. + if (entity != null && entity.getContentLength() != 0) { + final Header ceheader = entity.getContentEncoding(); + if (ceheader != null) { + final HeaderElement[] codecs = ceheader.getElements(); + boolean uncompressed = false; + for (final HeaderElement codec : codecs) { + final String codecname = codec.getName().toLowerCase(Locale.ENGLISH); + if ("gzip".equals(codecname) || "x-gzip".equals(codecname)) { + response.setEntity(new GzipDecompressingEntity(response.getEntity())); + uncompressed = true; + break; + } else if ("deflate".equals(codecname)) { + response.setEntity(new DeflateDecompressingEntity(response.getEntity())); + uncompressed = true; + break; + } else if ("identity".equals(codecname)) { + + /* Don't need to transform the content - no-op */ + return; + } else { + throw new HttpException("Unsupported Content-Coding: " + codec.getName()); + } + } + if (uncompressed) { + response.removeHeaders("Content-Length"); + response.removeHeaders("Content-Encoding"); + response.removeHeaders("Content-MD5"); + } + } + } + } + +} |