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80 lines
2.7 KiB
Java
80 lines
2.7 KiB
Java
/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package ch.boye.httpclientandroidlib.protocol;
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import java.io.IOException;
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import ch.boye.httpclientandroidlib.HttpException;
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import ch.boye.httpclientandroidlib.HttpRequest;
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import ch.boye.httpclientandroidlib.HttpRequestInterceptor;
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import ch.boye.httpclientandroidlib.annotation.Immutable;
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import ch.boye.httpclientandroidlib.params.CoreProtocolPNames;
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import ch.boye.httpclientandroidlib.params.HttpParams;
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import ch.boye.httpclientandroidlib.util.Args;
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/**
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* RequestUserAgent is responsible for adding <code>User-Agent</code> header.
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* This interceptor is recommended for client side protocol processors.
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*
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* @since 4.0
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*/
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@SuppressWarnings("deprecation")
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@Immutable
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public class RequestUserAgent implements HttpRequestInterceptor {
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private final String userAgent;
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public RequestUserAgent(final String userAgent) {
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super();
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this.userAgent = userAgent;
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}
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public RequestUserAgent() {
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this(null);
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}
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public void process(final HttpRequest request, final HttpContext context)
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throws HttpException, IOException {
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Args.notNull(request, "HTTP request");
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if (!request.containsHeader(HTTP.USER_AGENT)) {
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String s = null;
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final HttpParams params = request.getParams();
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if (params != null) {
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s = (String) params.getParameter(CoreProtocolPNames.USER_AGENT);
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}
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if (s == null) {
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s = this.userAgent;
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}
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if (s != null) {
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request.addHeader(HTTP.USER_AGENT, s);
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}
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}
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}
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}
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