The Tor Browser: mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/AbstractMessageParser.java@fc2d59ddac77 (annotated)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/AbstractMessageParser.java@fc2d59ddac77 (annotated)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/AbstractMessageParser.java

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /*
  * ====================================================================
  * 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.impl.io;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import ch.boye.httpclientandroidlib.Header;
 import ch.boye.httpclientandroidlib.HttpException;
 import ch.boye.httpclientandroidlib.HttpMessage;
 import ch.boye.httpclientandroidlib.ParseException;
 import ch.boye.httpclientandroidlib.ProtocolException;
 import ch.boye.httpclientandroidlib.io.HttpMessageParser;
 import ch.boye.httpclientandroidlib.io.SessionInputBuffer;
 import ch.boye.httpclientandroidlib.message.LineParser;
 import ch.boye.httpclientandroidlib.message.BasicLineParser;
 import ch.boye.httpclientandroidlib.params.CoreConnectionPNames;
 import ch.boye.httpclientandroidlib.params.HttpParams;
 import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
 /**
  * Abstract base class for HTTP message parsers that obtain input from
  * an instance of {@link SessionInputBuffer}.
  * <p>
  * The following parameters can be used to customize the behavior of this
  * class:
  * <ul>
  *  <li>{@link ch.boye.httpclientandroidlib.params.CoreConnectionPNames#MAX_HEADER_COUNT}</li>
  *  <li>{@link ch.boye.httpclientandroidlib.params.CoreConnectionPNames#MAX_LINE_LENGTH}</li>
  * </ul>
  *
  * @since 4.0
  */
 public abstract class AbstractMessageParser implements HttpMessageParser {
     private static final int HEAD_LINE    = 0;
     private static final int HEADERS      = 1;
     private final SessionInputBuffer sessionBuffer;
     private final int maxHeaderCount;
     private final int maxLineLen;
     private final List headerLines;
     protected final LineParser lineParser;
     private int state;
     private HttpMessage message;
     /**
      * Creates an instance of this class.
      *
      * @param buffer the session input buffer.
      * @param parser the line parser.
      * @param params HTTP parameters.
      */
     public AbstractMessageParser(
             final SessionInputBuffer buffer,
             final LineParser parser,
             final HttpParams params) {
         super();
         if (buffer == null) {
             throw new IllegalArgumentException("Session input buffer may not be null");
         }
         if (params == null) {
             throw new IllegalArgumentException("HTTP parameters may not be null");
         }
         this.sessionBuffer = buffer;
         this.maxHeaderCount = params.getIntParameter(
                 CoreConnectionPNames.MAX_HEADER_COUNT, -1);
         this.maxLineLen = params.getIntParameter(
                 CoreConnectionPNames.MAX_LINE_LENGTH, -1);
         this.lineParser = (parser != null) ? parser : BasicLineParser.DEFAULT;
         this.headerLines = new ArrayList();
         this.state = HEAD_LINE;
     }
     /**
      * Parses HTTP headers from the data receiver stream according to the generic
      * format as given in Section 3.1 of RFC 822, RFC-2616 Section 4 and 19.3.
      *
      * @param inbuffer Session input buffer
      * @param maxHeaderCount maximum number of headers allowed. If the number
      *  of headers received from the data stream exceeds maxCount value, an
      *  IOException will be thrown. Setting this parameter to a negative value
      *  or zero will disable the check.
      * @param maxLineLen maximum number of characters for a header line,
      *  including the continuation lines. Setting this parameter to a negative
      *  value or zero will disable the check.
      * @return array of HTTP headers
      * @param parser line parser to use. Can be <code>null</code>, in which case
      *  the default implementation of this interface will be used.
      *
      * @throws IOException in case of an I/O error
      * @throws HttpException in case of HTTP protocol violation
      */
     public static Header[] parseHeaders(
             final SessionInputBuffer inbuffer,
             int maxHeaderCount,
             int maxLineLen,
             LineParser parser)
         throws HttpException, IOException {
         if (parser == null) {
             parser = BasicLineParser.DEFAULT;
         }
         List headerLines = new ArrayList();
         return parseHeaders(inbuffer, maxHeaderCount, maxLineLen, parser, headerLines);
     }
     /**
      * Parses HTTP headers from the data receiver stream according to the generic
      * format as given in Section 3.1 of RFC 822, RFC-2616 Section 4 and 19.3.
      *
      * @param inbuffer Session input buffer
      * @param maxHeaderCount maximum number of headers allowed. If the number
      *  of headers received from the data stream exceeds maxCount value, an
      *  IOException will be thrown. Setting this parameter to a negative value
      *  or zero will disable the check.
      * @param maxLineLen maximum number of characters for a header line,
      *  including the continuation lines. Setting this parameter to a negative
      *  value or zero will disable the check.
      * @param parser line parser to use.
      * @param headerLines List of header lines. This list will be used to store
      *   intermediate results. This makes it possible to resume parsing of
      *   headers in case of a {@link java.io.InterruptedIOException}.
      *
      * @return array of HTTP headers
      *
      * @throws IOException in case of an I/O error
      * @throws HttpException in case of HTTP protocol violation
      *
      * @since 4.1
      */
     public static Header[] parseHeaders(
             final SessionInputBuffer inbuffer,
             int maxHeaderCount,
             int maxLineLen,
             final LineParser parser,
             final List headerLines)
         throws HttpException, IOException {
         if (inbuffer == null) {
             throw new IllegalArgumentException("Session input buffer may not be null");
         }
         if (parser == null) {
             throw new IllegalArgumentException("Line parser may not be null");
         }
         if (headerLines == null) {
             throw new IllegalArgumentException("Header line list may not be null");
         }
         CharArrayBuffer current = null;
         CharArrayBuffer previous = null;
         for (;;) {
             if (current == null) {
                 current = new CharArrayBuffer(64);
             } else {
                 current.clear();
             }
             int l = inbuffer.readLine(current);
             if (l == -1 || current.length() < 1) {
                 break;
             }
             // Parse the header name and value
             // Check for folded headers first
             // Detect LWS-char see HTTP/1.0 or HTTP/1.1 Section 2.2
             // discussion on folded headers
             if ((current.charAt(0) == ' ' || current.charAt(0) == '\t') && previous != null) {
                 // we have continuation folded header
                 // so append value
                 int i = 0;
                 while (i < current.length()) {
                     char ch = current.charAt(i);
                     if (ch != ' ' && ch != '\t') {
                         break;
                     }
                     i++;
                 }
                 if (maxLineLen > 0
                         && previous.length() + 1 + current.length() - i > maxLineLen) {
                     throw new IOException("Maximum line length limit exceeded");
                 }
                 previous.append(' ');
                 previous.append(current, i, current.length() - i);
             } else {
                 headerLines.add(current);
                 previous = current;
                 current = null;
             }
             if (maxHeaderCount > 0 && headerLines.size() >= maxHeaderCount) {
                 throw new IOException("Maximum header count exceeded");
             }
         }
         Header[] headers = new Header[headerLines.size()];
         for (int i = 0; i < headerLines.size(); i++) {
             CharArrayBuffer buffer = (CharArrayBuffer) headerLines.get(i);
             try {
                 headers[i] = parser.parseHeader(buffer);
             } catch (ParseException ex) {
                 throw new ProtocolException(ex.getMessage());
             }
         }
         return headers;
     }
     /**
      * Subclasses must override this method to generate an instance of
      * {@link HttpMessage} based on the initial input from the session buffer.
      * <p>
      * Usually this method is expected to read just the very first line or
      * the very first valid from the data stream and based on the input generate
      * an appropriate instance of {@link HttpMessage}.
      *
      * @param sessionBuffer the session input buffer.
      * @return HTTP message based on the input from the session buffer.
      * @throws IOException in case of an I/O error.
      * @throws HttpException in case of HTTP protocol violation.
      * @throws ParseException in case of a parse error.
      */
     protected abstract HttpMessage parseHead(SessionInputBuffer sessionBuffer)
         throws IOException, HttpException, ParseException;
     public HttpMessage parse() throws IOException, HttpException {
         int st = this.state;
         switch (st) {
         case HEAD_LINE:
             try {
                 this.message = parseHead(this.sessionBuffer);
             } catch (ParseException px) {
                 throw new ProtocolException(px.getMessage(), px);
             }
             this.state = HEADERS;
             //$FALL-THROUGH$
         case HEADERS:
             Header[] headers = AbstractMessageParser.parseHeaders(
                     this.sessionBuffer,
                     this.maxHeaderCount,
                     this.maxLineLen,
                     this.lineParser,
                     this.headerLines);
             this.message.setHeaders(headers);
             HttpMessage result = this.message;
             this.message = null;
             this.headerLines.clear();
             this.state = HEAD_LINE;
             return result;
         default:
             throw new IllegalStateException("Inconsistent parser state");
         }
     }
 }

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mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/AbstractMessageParser.java@fc2d59ddac77 (annotated)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/AbstractMessageParser.java