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XSECBinHTTPURIInputStream.hpp

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00001 /*
00002  * The Apache Software License, Version 1.1
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00004  *
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00007  *
00008  * Redistribution and use in source and binary forms, with or without
00009  * modification, are permitted provided that the following conditions
00010  * are met:
00011  *
00012  * 1. Redistributions of source code must retain the above copyright
00013  *    notice, this list of conditions and the following disclaimer. 
00014  *
00015  * 2. Redistributions in binary form must reproduce the above copyright
00016  *    notice, this list of conditions and the following disclaimer in
00017  *    the documentation and/or other materials provided with the
00018  *    distribution.
00019  *
00020  * 3. The end-user documentation included with the redistribution,
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00024  *    Alternately, this acknowledgment may appear in the software itself,
00025  *    if and wherever such third-party acknowledgments normally appear.
00026  *
00027  * 4. The names "<WebSig>" and "Apache Software Foundation" must
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00059 
00060 /*
00061  * XSEC
00062  *
00063  * XSECBinHTTPURIInputStream := Re-implementation of the Xerces
00064  *                              BinHTTPURLInputStream.  Allows us to make
00065  *                              some small changes to support the requirements
00066  *                              of XMLDSIG (notably re-directs)
00067  *
00068  * NOTE: Much code taken from Xerces, and the cross platform interfacing is
00069  * no-where near as nice.
00070  *
00071  * Author(s): Berin Lautenbach
00072  *
00073  * $Id: XSECBinHTTPURIInputStream.hpp,v 1.1 2003/02/12 09:45:29 blautenb Exp $
00074  *
00075  * $Log: XSECBinHTTPURIInputStream.hpp,v $
00076  * Revision 1.1  2003/02/12 09:45:29  blautenb
00077  * Win32 Re-implementation of Xerces URIResolver to support re-directs
00078  *
00079  *
00080  */
00081 
00082 
00083 #ifndef XSECBINHTTPURIINPUTSTREAM_HEADER
00084 #define XSECBINHTTPURIINPUTSTREAM_HEADER
00085 
00086 #include <xsec/framework/XSECDefs.hpp>
00087 
00088 #include <xercesc/util/XMLUri.hpp>
00089 #include <xercesc/util/XMLExceptMsgs.hpp>
00090 #include <xercesc/util/BinInputStream.hpp>
00091 #include <xercesc/util/Mutexes.hpp>
00092 
00093 XSEC_USING_XERCES(BinInputStream);
00094 XSEC_USING_XERCES(XMLUri);
00095 XSEC_USING_XERCES(XMLMutex);
00096 
00097 //
00098 // This class implements the BinInputStream interface specified by the XML
00099 // parser.
00100 //
00101 
00102 struct hostent;
00103 struct sockaddr;
00104 
00105 
00106 class DSIG_EXPORT XSECBinHTTPURIInputStream : public BinInputStream
00107 {
00108 public :
00109 
00110     XSECBinHTTPURIInputStream(const XMLUri&  urlSource);
00111     ~XSECBinHTTPURIInputStream();
00112 
00113     unsigned int curPos() const;
00114     unsigned int readBytes(XMLByte* const  toFill, const unsigned int    maxToRead);
00115 
00116     static void Cleanup();
00117 
00118 
00119 private :
00120     // -----------------------------------------------------------------------
00121     //  Private data members
00122     //
00123     //  fSocketHandle
00124     //      The socket representing the connection to the remote file.
00125     //      We deliberately did not define the type to be SOCKET, so as to
00126     //      avoid bringing in any Windows header into this file.
00127     //  fBytesProcessed
00128     //      Its a rolling count of the number of bytes processed off this
00129     //      input stream.
00130     //  fBuffer
00131     //      Holds the http header, plus the first part of the actual
00132     //      data.  Filled at the time the stream is opened, data goes
00133     //      out to user in response to readBytes().
00134     //  fBufferPos, fBufferEnd
00135     //      Pointers into fBuffer, showing start and end+1 of content
00136     //      that readBytes must return.
00137     // -----------------------------------------------------------------------
00138 
00139     unsigned int        fSocketHandle;
00140     unsigned int        fBytesProcessed;
00141     char                fBuffer[4000];
00142     char *              fBufferEnd;
00143     char *              fBufferPos;
00144     static bool         fInitialized;
00145     static XMLMutex*    fInitMutex;
00146 
00147     static void Initialize();
00148     unsigned int getSocketHandle(const XMLUri&  urlSource);
00149 
00150     inline static hostent* gethostbyname(const char* name);
00151     inline static unsigned long inet_addr(const char* cp);
00152     inline static hostent* gethostbyaddr(const char* addr,int len,int type);
00153     inline static unsigned short htons(unsigned short hostshort);
00154     inline static unsigned short socket(int af,int type,int protocol);
00155     inline static int connect(unsigned short s,const sockaddr* name,int namelen);
00156     inline static int send(unsigned short s,const char* buf,int len,int flags);
00157     inline static int recv(unsigned short s,char* buf,int len,int flags);
00158     inline static int shutdown(unsigned int s,int how);
00159     inline static int closesocket(unsigned int socket);
00160 };
00161 
00162 
00163 inline unsigned int XSECBinHTTPURIInputStream::curPos() const
00164 {
00165     return fBytesProcessed;
00166 }
00167 
00168 
00169 #endif // XSECBINHTTPURIINPUTSTREAM_HEADER

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