LocalFileInputSource.cpp
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上传日期:2013-06-25
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词法分析
开发平台:
Visual C++
- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999-2000 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xerces" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation, and was
- * originally based on software copyright (c) 1999, International
- * Business Machines, Inc., http://www.ibm.com . For more information
- * on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- // ---------------------------------------------------------------------------
- // Includes
- // ---------------------------------------------------------------------------
- #include <xercesc/framework/LocalFileInputSource.hpp>
- #include <xercesc/util/BinFileInputStream.hpp>
- #include <xercesc/util/PlatformUtils.hpp>
- #include <xercesc/util/XMLString.hpp>
- #include <xercesc/util/XMLUniDefs.hpp>
- XERCES_CPP_NAMESPACE_BEGIN
- /***
- *
- * Originated by Chris larsson
- *
- * Issue:
- *
- * There is an inconsistency in URI resolution in the case where the file itself is a
- * symbolic link to another path (or the path has path segment which is a symbolic
- * link to another path). So, is the base path the directory where the symbolic link resides
- * or the directory where the real file resides? I'm sure one could argue either way,
- * but I think that having the base path be the directory where the symbolic link resides
- * is more intuitive.
- *
- * Defining it this way would then make the behavior consistent with using an absolute
- * path as well as with the java behavior.
- *
- * Proposal:
- *
- * The URI is resolved within the parser code, and is somewhat independant of the OS.
- *
- * A relative path is resolved by querying the current directory and appending the
- * relative part onto the returned current directory string to obtain the base URI.
- * An absolute path is simply used as the base URI.
- * Then remove all "./" and "../" path segments using an algorithm like weavepath to obtain
- * the resolved base URI.
- *
- * When you need to access another file such as a dtd, use the resolved base URI and add on
- * the relative URI of the dtd file. Then resolve it using the same weavepath algorithm.
- *
- * Note:
- *
- * Java parser behaves differently for a path containning symbolic path segment. When
- * it is given an absolute path, it can locate the primary instance document, while given
- * relative path, it might not.
- *
- * It is because Java parser uses URI solution where "/segment/../" is required to be removed
- * from the resultant path if a relative URI is merged to a baseURI. While this is NOT required
- * for an absolute URI.
- *
- * So if a path segment, which is symbolic link, happen to be followed by the '/../', it is
- * NOT removed from the path if it is given in absolute form, and the underlying file system
- * will locate the file, if in relative form, that symbolic link path segment together with
- * '../' is removed from the resultant path, and the file system may NOT be able to locate
- * the file, if there is a one, it is definitely not the one expected, in fact by accident.
- *
- * Therefore, to keep consistent with Java parser, for now, we do not apply removeDotDotSlash()
- * for absolute path.
- *
- ***/
- // ---------------------------------------------------------------------------
- // LocalFileInputSource: Constructors and Destructor
- // ---------------------------------------------------------------------------
- LocalFileInputSource::LocalFileInputSource( const XMLCh* const basePath
- , const XMLCh* const relativePath
- , MemoryManager* const manager)
- : InputSource(manager)
- {
- //
- // If the relative part is really relative, then weave it together
- // with the base path. If not, just take the relative path as the
- // entire path.
- //
- if (XMLPlatformUtils::isRelative(relativePath))
- {
- XMLCh* tmpBuf = XMLPlatformUtils::weavePaths(basePath, relativePath);
- setSystemId(tmpBuf);
- XMLPlatformUtils::fgMemoryManager->deallocate(tmpBuf); //delete [] tmpBuf;
- }
- else
- {
- XMLCh* tmpBuf = XMLString::replicate(relativePath, getMemoryManager());
- XMLPlatformUtils::removeDotSlash(tmpBuf);
- setSystemId(tmpBuf);
- getMemoryManager()->deallocate(tmpBuf);//delete [] tmpBuf;
- }
- }
- LocalFileInputSource::LocalFileInputSource(const XMLCh* const filePath,
- MemoryManager* const manager)
- : InputSource(manager)
- {
- //
- // If the path is relative, then complete it acording to the current
- // working directory rules of the current platform. Else, just take
- // it as is.
- //
- if (XMLPlatformUtils::isRelative(filePath))
- {
- XMLCh* curDir = XMLPlatformUtils::getCurrentDirectory(getMemoryManager());
- int curDirLen = XMLString::stringLen(curDir);
- int filePathLen = XMLString::stringLen(filePath);
- XMLCh* fullDir = (XMLCh*) getMemoryManager()->allocate
- (
- (curDirLen + filePathLen + 2) * sizeof(XMLCh)
- );//new XMLCh [ curDirLen + filePathLen + 2];
- XMLString::copyString(fullDir, curDir);
- fullDir[curDirLen] = chForwardSlash;
- XMLString::copyString(&fullDir[curDirLen+1], filePath);
- XMLPlatformUtils::removeDotSlash(fullDir);
- XMLPlatformUtils::removeDotDotSlash(fullDir);
- setSystemId(fullDir);
- getMemoryManager()->deallocate(curDir);//delete [] curDir;
- getMemoryManager()->deallocate(fullDir);//delete [] fullDir;
- }
- else
- {
- XMLCh* tmpBuf = XMLString::replicate(filePath, getMemoryManager());
- XMLPlatformUtils::removeDotSlash(tmpBuf);
- setSystemId(tmpBuf);
- getMemoryManager()->deallocate(tmpBuf);//delete [] tmpBuf;
- }
- }
- LocalFileInputSource::~LocalFileInputSource()
- {
- }
- // ---------------------------------------------------------------------------
- // LocalFileInputSource: InputSource interface implementation
- // ---------------------------------------------------------------------------
- BinInputStream* LocalFileInputSource::makeStream() const
- {
- BinFileInputStream* retStrm = new (getMemoryManager()) BinFileInputStream(getSystemId());
- if (!retStrm->getIsOpen())
- {
- delete retStrm;
- return 0;
- }
- return retStrm;
- }
- XERCES_CPP_NAMESPACE_END