| /* |
| * ==================================================================== |
| * 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.protocol; |
| |
| import java.io.IOException; |
| |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| import org.apache.hc.core5.http.EntityDetails; |
| 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.HttpRequest; |
| import org.apache.hc.core5.http.HttpRequestInterceptor; |
| import org.apache.hc.core5.http.HttpVersion; |
| import org.apache.hc.core5.http.Method; |
| import org.apache.hc.core5.http.ProtocolException; |
| import org.apache.hc.core5.http.ProtocolVersion; |
| import org.apache.hc.core5.http.message.MessageSupport; |
| import org.apache.hc.core5.util.Args; |
| |
| /** |
| * RequestContent is the most important interceptor for outgoing requests. |
| * It is responsible for delimiting content length by adding |
| * {@code Content-Length} or {@code Transfer-Content} headers based |
| * on the properties of the enclosed entity and the protocol version. |
| * This interceptor is required for correct functioning of client side protocol |
| * processors. |
| * |
| * @since 4.0 |
| */ |
| @Contract(threading = ThreadingBehavior.IMMUTABLE) |
| public class RequestContent implements HttpRequestInterceptor { |
| |
| private final boolean overwrite; |
| |
| /** |
| * Default constructor. The {@code Content-Length} or {@code Transfer-Encoding} |
| * will cause the interceptor to throw {@link ProtocolException} if already present in the |
| * response message. |
| */ |
| public RequestContent() { |
| this(false); |
| } |
| |
| /** |
| * Constructor that can be used to fine-tune behavior of this interceptor. |
| * |
| * @param overwrite If set to {@code true} the {@code Content-Length} and |
| * {@code Transfer-Encoding} headers will be created or updated if already present. |
| * If set to {@code false} the {@code Content-Length} and |
| * {@code Transfer-Encoding} headers will cause the interceptor to throw |
| * {@link ProtocolException} if already present in the response message. |
| * |
| * @since 4.2 |
| */ |
| public RequestContent(final boolean overwrite) { |
| super(); |
| this.overwrite = overwrite; |
| } |
| |
| @Override |
| public void process(final HttpRequest request, final EntityDetails entity, final HttpContext context) |
| throws HttpException, IOException { |
| Args.notNull(request, "HTTP request"); |
| final String method = request.getMethod(); |
| if (Method.TRACE.isSame(method) && entity != null) { |
| throw new ProtocolException("TRACE request may not enclose an entity"); |
| } |
| if (this.overwrite) { |
| request.removeHeaders(HttpHeaders.TRANSFER_ENCODING); |
| request.removeHeaders(HttpHeaders.CONTENT_LENGTH); |
| } else { |
| if (request.containsHeader(HttpHeaders.TRANSFER_ENCODING)) { |
| throw new ProtocolException("Transfer-encoding header already present"); |
| } |
| if (request.containsHeader(HttpHeaders.CONTENT_LENGTH)) { |
| throw new ProtocolException("Content-Length header already present"); |
| } |
| } |
| if (entity != null) { |
| final ProtocolVersion ver = context.getProtocolVersion(); |
| // Must specify a transfer encoding or a content length |
| if (entity.isChunked() || entity.getContentLength() < 0) { |
| if (ver.lessEquals(HttpVersion.HTTP_1_0)) { |
| throw new ProtocolException( |
| "Chunked transfer encoding not allowed for " + ver); |
| } |
| request.addHeader(HttpHeaders.TRANSFER_ENCODING, HeaderElements.CHUNKED_ENCODING); |
| MessageSupport.addTrailerHeader(request, entity); |
| } else { |
| request.addHeader(HttpHeaders.CONTENT_LENGTH, Long.toString(entity.getContentLength())); |
| } |
| MessageSupport.addContentTypeHeader(request, entity); |
| MessageSupport.addContentEncodingHeader(request, entity); |
| } |
| } |
| |
| } |