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100 lines
3.8 KiB
Java
100 lines
3.8 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.impl.io;
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import java.io.IOException;
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import java.util.Iterator;
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import ch.boye.httpclientandroidlib.Header;
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import ch.boye.httpclientandroidlib.HttpException;
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import ch.boye.httpclientandroidlib.HttpMessage;
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import ch.boye.httpclientandroidlib.io.HttpMessageWriter;
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import ch.boye.httpclientandroidlib.io.SessionOutputBuffer;
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import ch.boye.httpclientandroidlib.message.LineFormatter;
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import ch.boye.httpclientandroidlib.message.BasicLineFormatter;
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import ch.boye.httpclientandroidlib.params.HttpParams;
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import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
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/**
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* Abstract base class for HTTP message writers that serialize output to
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* an instance of {@link SessionOutputBuffer}.
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*
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* @since 4.0
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*/
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public abstract class AbstractMessageWriter implements HttpMessageWriter {
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protected final SessionOutputBuffer sessionBuffer;
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protected final CharArrayBuffer lineBuf;
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protected final LineFormatter lineFormatter;
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/**
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* Creates an instance of AbstractMessageWriter.
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*
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* @param buffer the session output buffer.
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* @param formatter the line formatter.
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* @param params HTTP parameters.
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*/
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public AbstractMessageWriter(final SessionOutputBuffer buffer,
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final LineFormatter formatter,
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final HttpParams params) {
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super();
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if (buffer == null) {
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throw new IllegalArgumentException("Session input buffer may not be null");
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}
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this.sessionBuffer = buffer;
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this.lineBuf = new CharArrayBuffer(128);
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this.lineFormatter = (formatter != null) ?
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formatter : BasicLineFormatter.DEFAULT;
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}
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/**
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* Subclasses must override this method to write out the first header line
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* based on the {@link HttpMessage} passed as a parameter.
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*
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* @param message the message whose first line is to be written out.
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* @throws IOException in case of an I/O error.
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*/
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protected abstract void writeHeadLine(HttpMessage message) throws IOException;
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public void write(
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final HttpMessage message) throws IOException, HttpException {
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if (message == null) {
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throw new IllegalArgumentException("HTTP message may not be null");
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}
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writeHeadLine(message);
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for (Iterator it = message.headerIterator(); it.hasNext(); ) {
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Header header = (Header) it.next();
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this.sessionBuffer.writeLine
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(lineFormatter.formatHeader(this.lineBuf, header));
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}
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this.lineBuf.clear();
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this.sessionBuffer.writeLine(this.lineBuf);
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}
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}
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