/*

 * 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: BinHTTPURLInputStream.hpp 568078 2007-08-21 11:43:25Z amassari $

 */

#if !defined(BINHTTPURLINPUTSTREAM_HPP)

#define BINHTTPURLINPUTSTREAM_HPP

#include <xercesc/util/XMLURL.hpp>

#include <xercesc/util/XMLExceptMsgs.hpp>

#include <xercesc/util/BinInputStream.hpp>

#include <xercesc/util/Mutexes.hpp>

#include <xercesc/util/XMLNetAccessor.hpp>

//

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

// parser.

//

struct hostent;

struct sockaddr;

XERCES_CPP_NAMESPACE_BEGIN

class XMLUTIL_EXPORT BinHTTPURLInputStream : public BinInputStream

{

public :

    BinHTTPURLInputStream(const XMLURL&  urlSource, const XMLNetHTTPInfo* httpInfo=0);

    ~BinHTTPURLInputStream();

    unsigned int curPos() const;

    unsigned int readBytes

    (

                XMLByte* const  toFill

        , const unsigned int    maxToRead

    );

	static void Cleanup();

private :

    // -----------------------------------------------------------------------

    //  Unimplemented constructors and operators

    // -----------------------------------------------------------------------

    BinHTTPURLInputStream(const BinHTTPURLInputStream&);

    BinHTTPURLInputStream& operator=(const BinHTTPURLInputStream&); 

    // -----------------------------------------------------------------------

    //  Private data members

    //

    //  fSocketHandle

    //      The socket representing the connection to the remote file.

    //      We deliberately did not define the type to be SOCKET, so as to

    //      avoid bringing in any Windows header into this 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.

    // -----------------------------------------------------------------------

    MemoryManager*      fMemoryManager;

    unsigned int        fSocketHandle;

    unsigned int        fBytesProcessed;

    char                fBuffer[4000];

    char *              fBufferEnd;

    char *              fBufferPos;

    static bool         fInitialized;

    static XMLMutex*        fInitMutex;

	static void Initialize(MemoryManager* const manager  = XMLPlatformUtils::fgMemoryManager);

	inline static hostent* gethostbyname(const char* name);

	inline static unsigned long inet_addr(const char* cp);

	inline static hostent* gethostbyaddr(const char* addr,int len,int type);

	inline static unsigned short htons(unsigned short hostshort);

	inline static unsigned int socket(int af,int type,int protocol);

	inline static int connect(unsigned int s,const sockaddr* name,int namelen);

	inline static int send(unsigned int s,const char* buf,int len,int flags);

	inline static int recv(unsigned int s,char* buf,int len,int flags);

	inline static int shutdown(unsigned int s,int how);

	inline static int closesocket(unsigned int socket);

    friend class SocketJanitor;

};

inline unsigned int BinHTTPURLInputStream::curPos() const

{

    return fBytesProcessed;

}

XERCES_CPP_NAMESPACE_END

#endif // BINHTTPURLINPUTSTREAM_HPP