unixhttpurlinputstream.hpp

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/*
 * 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.
 */

/*
 * $Id: UnixHTTPURLInputStream.hpp 568078 2007-08-21 11:43:25Z amassari $
 */

#if !defined(UNIXHTTPURLINPUTSTREAM_HPP)
#define UNIXHTTPURLINPUTSTREAM_HPP


#include <xercesc/util/XMLURL.hpp>
#include <xercesc/util/XMLExceptMsgs.hpp>
#include <xercesc/util/BinInputStream.hpp>
#include <xercesc/util/XMLNetAccessor.hpp>

XERCES_CPP_NAMESPACE_BEGIN

//
// This class implements the BinInputStream interface specified by the XML
// parser.
//

class XMLUTIL_EXPORT UnixHTTPURLInputStream : public BinInputStream
{
public :
    UnixHTTPURLInputStream(const XMLURL&  urlSource, const XMLNetHTTPInfo* httpInfo=0);
    ~UnixHTTPURLInputStream();

    unsigned int curPos() const;
    unsigned int readBytes
    (
                XMLByte* const  toFill
        , const unsigned int    maxToRead
    );


private :
    // -----------------------------------------------------------------------
    //  Unimplemented constructors and operators
    // -----------------------------------------------------------------------
    UnixHTTPURLInputStream(const UnixHTTPURLInputStream&);
    UnixHTTPURLInputStream& operator=(const UnixHTTPURLInputStream&);

    // -----------------------------------------------------------------------
    //  Private data members
    //
    //  fSocket
    //      The socket representing the connection to the remote file.
    //  fBytesProcessed
    //      Its a rolling count of the number of bytes processed off this
    //      input stream.
    //  fBuffer
    //      Holds the http header, plus the first part of the actual
    //      data.  Filled at the time the stream is opened, data goes
    //      out to user in response to readBytes().
    //  fBufferPos, fBufferEnd
    //      Pointers into fBuffer, showing start and end+1 of content
    //      that readBytes must return.
    // -----------------------------------------------------------------------

    int                 fSocket;
    unsigned int        fBytesProcessed;
    char                fBuffer[4000];
    char *              fBufferEnd;
    char *              fBufferPos;
    MemoryManager*      fMemoryManager;
}; // UnixHTTPURLInputStream


inline unsigned int UnixHTTPURLInputStream::curPos() const
{
    return fBytesProcessed;
}

XERCES_CPP_NAMESPACE_END

#endif // UNIXHTTPURLINPUTSTREAM_HPP