| /* |
| * ==================================================================== |
| * 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 org.apache.hc.core5.http.impl; |
| |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| import org.apache.hc.core5.http.ContentLengthStrategy; |
| import org.apache.hc.core5.http.Header; |
| import org.apache.hc.core5.http.HeaderElements; |
| import org.apache.hc.core5.http.HttpException; |
| import org.apache.hc.core5.http.HttpHeaders; |
| import org.apache.hc.core5.http.HttpMessage; |
| import org.apache.hc.core5.http.NotImplementedException; |
| import org.apache.hc.core5.http.ProtocolException; |
| import org.apache.hc.core5.util.Args; |
| |
| /** |
| * The default implementation of the content length strategy. This class |
| * will throw {@link ProtocolException} if it encounters an unsupported |
| * transfer encoding, multiple {@code Content-Length} header |
| * values or a malformed {@code Content-Length} header value. |
| * <p> |
| * This class recognizes "chunked" transfer-coding only. |
| * |
| * @since 5.0 |
| */ |
| @Contract(threading = ThreadingBehavior.IMMUTABLE) |
| public class DefaultContentLengthStrategy implements ContentLengthStrategy { |
| |
| public static final DefaultContentLengthStrategy INSTANCE = new DefaultContentLengthStrategy(); |
| |
| /** |
| * Creates {@code DefaultContentLengthStrategy} instance. {@link ContentLengthStrategy#UNDEFINED} |
| * is used per default when content length is not explicitly specified in the message. |
| */ |
| public DefaultContentLengthStrategy() { |
| } |
| |
| @Override |
| public long determineLength(final HttpMessage message) throws HttpException { |
| Args.notNull(message, "HTTP message"); |
| // Although Transfer-Encoding is specified as a list, in practice |
| // it is either missing or has the single value "chunked". So we |
| // treat it as a single-valued header here. |
| final Header transferEncodingHeader = message.getFirstHeader(HttpHeaders.TRANSFER_ENCODING); |
| if (transferEncodingHeader != null) { |
| final String headerValue = transferEncodingHeader.getValue(); |
| if (HeaderElements.CHUNKED_ENCODING.equalsIgnoreCase(headerValue)) { |
| return CHUNKED; |
| } |
| throw new NotImplementedException("Unsupported transfer encoding: " + headerValue); |
| } |
| if (message.countHeaders(HttpHeaders.CONTENT_LENGTH) > 1) { |
| throw new ProtocolException("Multiple Content-Length headers"); |
| } |
| final Header contentLengthHeader = message.getFirstHeader(HttpHeaders.CONTENT_LENGTH); |
| if (contentLengthHeader != null) { |
| final String s = contentLengthHeader.getValue(); |
| try { |
| final long len = Long.parseLong(s); |
| if (len < 0) { |
| throw new ProtocolException("Negative content length: " + s); |
| } |
| return len; |
| } catch (final NumberFormatException e) { |
| throw new ProtocolException("Invalid content length: " + s); |
| } |
| } |
| return UNDEFINED; |
| } |
| |
| } |